KR20160009744A - Cargo for liquefied gas and manufacturing method thereof - Google Patents

Abstract

Disclosed are a liquefied gas tank including a barrier having a corrugation part and a manufacturing method thereof. The liquefied gas tank according to an embodiment of the present invention, which is to store liquefied gas therein, comprises: an insulation panel structure which is installed on an outer wall to insulate liquefied gas from the outside and includes flat panels installed in flat plate parts and corner panels installed in corner parts; and a barrier which is fixed to the insulation panel structure to seal the insulation panel structure and includes flat parts and corrugation parts. At least one from the corrugation parts of the flat barrier fixed to the flat panels in both sides of the corner panels is arranged to not meet the corrugation parts of the corner barrier fixed to the corner panels, and the ends of the corrugation parts arranged to not meet the corrugation parts of the corner barrier are connected to the flat parts of the adjacent barrier to maintain the sealed state.

Description

Technical Field [0001] The present invention relates to a liquefied gas holding window,

The present invention relates to a liquefied gas holding window and a method of manufacturing the same, and more particularly, to a liquefied gas holding window including a barrier provided with a wrinkle portion and a method of manufacturing the same.

The liquefied gas is a gas which is cooled or compressed to be made into a liquid. For convenience of transportation, the gas which is gas at room temperature is used as a liquid. One of the important uses in liquefied gas is liquefied natural gas. Liquefied natural gas (LNG) refers to a colorless transparent cryogenic liquid with a methane-based natural gas cooled to -162 ° C, reducing its volume by one-sixth.

As such liquefied natural gas is used as an energy source, an efficient transportation method that can transport the gas from the production base to the purchase site of the customer site has been examined in order to use this gas as energy. As a result of this effort, a large amount of liquefied gas A liquefied gas transport vessel capable of transporting liquefied natural gas to the sea was developed.

However, the liquefied gas transportation vessel is required to have a cargo that can store and store the liquefied gas liquefied at an extremely low temperature.

That is, since the liquefied natural gas has a higher vapor pressure than the atmospheric pressure and has a boiling temperature of about -162 ° C, in order to safely store and store such liquefied natural gas, For example, it should be made of aluminum steel, stainless steel, 35% nickel steel, etc. It should be designed with a unique insulation panel structure which is resistant to thermal stress and heat shrinkage and prevents heat penetration. Such a liquefied gas holding window can be divided into a self-supporting type and a membrane type according to its structure.

If the liquefied gas leaks to the inside of the heat insulating panel, it may cause damage to the cargo window due to rapid volume expansion due to temperature increase. Thus having a membrane barrier to seal the liquefied gas inside the cargo hold.

In the liquefied gas holding window, a plurality of barrier sheets are combined to form a membrane barrier. The barrier walls are thermally shrunk due to cryogenic liquefied gas, and when the thermal shrinkage occurs, the welded portion may be damaged by thermal stress.

Because of this problem, the barrier has a corrugation to have low in-plane stiffness. The reinforced corrugated part is deformed by a certain amount when heat shrinkage occurs, thereby reducing the thermal stress at the welded part.

Japanese Patent Application Laid-Open No. 10-2013-0092238 discloses a heat insulation structure of a liquefied natural gas storage window.

Published Japanese Patent Application No. 10-2013-0092238 (published on Aug. 20,

An embodiment of the present invention is to provide a liquefied gas holding window that can be installed easily, can shorten a manufacturing time and can maintain airtightness, and a method of manufacturing the same. And also to provide a liquefied gas holding window capable of improving resistance to thermal stress at a cryogenic temperature and a method of manufacturing the same.

According to an aspect of the present invention, there is provided a liquefied gas holding container for storing a liquefied gas, comprising: a flat panel provided on an outer wall for inspecting liquefied gas from the outside and provided on a flat plate portion; Insulation panel structure; And a barrier wall which is fixed on the heat insulating panel structure and seals the heat insulating panel structure, the barrier wall including a flat surface portion and a corrugation portion, wherein any one of the corrugations of the flat panel barrier fixed on the flat panel on both sides of the corner panel At least one of which is disposed so as to be offset from the corrugated portion of the corner barrier fixed on the corner panel and the end portion of the corrugated portion arranged to be shifted is connected to the flat portion of the adjacent barrier to maintain the sealed state, Can be provided.

The end portions of the corrugated portion of the corner barrier arranged to be shifted are connected with the planar portions of the adjacent planar barriers to maintain a sealed state and the end portions of the corrugated portions of the planar barrier ribs arranged to be shifted from each other, A liquefied gas holding window connected and held in a sealed state can be provided.

Both ends of the corrugated portion of the corner barrier may be provided so as to be aligned with the corrugated portion of the flat wall.

A liquefied gas holding window may be provided in which one end of the corrugation of the corner barrier is connected to the corrugation of the flat plate barrier and the other end of the corrugation is arranged to be offset from the corrugation of the flat barrier.

And an end portion of the corrugated portion of the corner barrier which is disposed to be offset from the corrugated portion of the flat plate wall may be provided with a liquefied gas holding window that is closed by the first end cap to maintain the sealed state.

The first end cap may be provided with a liquefied gas holding window wherein one side is fixed on an end of the corrugation of the corner barrier and the other side is fixed on the flat barrier.

An end portion of the end portion of the wrinkle portion of the flat barriers disposed so as to be offset from the corrugated portion of the corner barrier may be provided with a liquefied gas holding window that is closed by the second end cap to maintain the sealed state.

The second end cap may be provided with a liquefied gas holding window, one side of which is fixed on the end of the corrugation of the flat wall and the other side is fixed on the corner wall.

The corner barrier may be provided with a liquefied gas holding window including a plane portion continuously disposed and a corrugation portion of a corner barrier provided in a gap between the adjacent two plane portions.

The corner barrier may further include a first end cap to close the end of the corrugation of the corner barrier to maintain the sealed state.

The flat wall may be provided with a liquefied gas holding window including a first cut at an edge that meets the corrugation of the corner barrier.

Wherein the corner barrier is fixed on one end of the corrugation of the corner barrier and the other side is fixed on the flat barrier to close an end of the corrugation of the corner barrier to maintain the sealing state of the corner barrier, A liquefied gas holding window including a first end cap for receiving the incision portion therein may be provided.

The corner barrier may be provided with a liquefied gas holding window including a second cut at an edge that meets the corrugation of the flat barrier.

Wherein the flat barriers are fixed on one end of the corrugations of the flat barriers and the other side is fixed on the corner barriers to close end portions of the corrugations of the flat barriers to maintain the flat barriers in a sealed state, A liquefied gas holding window including a second end cap for receiving the cutout portion therein may be provided.

The flat barriers may be provided with a liquefied gas cargo hold including a corrugation of the corner barriers and an extending finishing corrugation.

The liquefied gas storage window may be provided on the upper portion of the heat insulating panel structure, and the gas flow passage communicating with the space inside the wrinkle portion arranged to be shifted and provided with a gas flow path for inspecting the airtightness of the barrier is provided.

According to another aspect of the present invention, there is provided a method of manufacturing a liquefied gas holding window for storing a liquefied gas, the method comprising the steps of: providing a heat insulating panel structure on an outer wall of a flat panel panel, A flat panel wall is provided on the flat panel, a corner wall is provided on the corner panel, and the flat panel and the corner barrier are provided on the flat panel and the corner panel, respectively. The corrugated portion of the flat wall and the corrugated portion of the corner wall are disposed so as to be offset from each other.

And a closed state of the barrier is maintained by closing the open end of the shifted wrinkle portion.

The liquefied gas holding window and the method of manufacturing the same according to the embodiment of the present invention do not require a marking operation for matching the corrugated portion of the flat surface portion and the corrugated portion of the corner portion.

Further, the thermal stress can be eliminated by including the cutout portion connected to the wrinkle portion.

1 is a cross-sectional view showing the structure of a liquefied gas holding window.
2 is a perspective view showing a corrugated portion connecting structure of a corner portion of a general cargo hold.
3 is a perspective view illustrating a connection structure of a corrugated portion of a corner portion of a cargo hold according to an embodiment of the present invention.
Fig. 4 is an exploded perspective view showing the wrinkle joint structure of Fig. 3;
5 is a perspective view illustrating a connection structure of a corrugated portion of a cargo hold corner according to another embodiment of the present invention.
Fig. 6 is an exploded perspective view showing the wrinkle joint structure of Fig. 5;
7 is an exploded perspective view showing a wrinkled portion coupling structure of a cargo hold corner portion including a cut portion.
8 is an exploded perspective view showing a wrinkle fitting structure of a corner portion of a cargo hold including a wrinkle portion in place of a cut portion on a flat portion barrier wall.
9 is a perspective view showing a gas flow passage of a cargo hold corner portion.

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

The embodiments described below are provided by way of example so that those skilled in the art will be able to fully understand the spirit of the present invention. The present invention is not limited to the embodiments described below and may be embodied in other forms. In order to clearly explain the present invention, parts not related to the description are omitted from the drawings, and the width, length, thickness, etc. of the components may be exaggerated for convenience. Like reference numerals designate like elements throughout the specification.

Liquefied gas storage is a facility for storing cryogenic fluid such as LNG (Liquefied Natural Gas) or LPG (Liquefied Petroleum Gas). It is used for transporting liquefied gas such as RV (Regasification Vessel), FPSO (Floating, Production, Storage and Offloading), FSRU (Floating Storage and Regasification Unit), SRV (Shuttle and Regasification Vessel) and the like, and a gas storage structure installed on the land.

The structure of the liquefied gas holding space insulation panel will now be described with reference to the accompanying drawings. 1 is a cross-sectional view showing the structure of a liquefied gas holding window.

The liquefied gas holding window includes a kitchen wall 50 and a two-layered heat insulating panel structure (U, L) for sealing the receiving space of the liquefied gas in order to ensure airtightness stability. The upper insulating panel structure (U) It is common to include an auxiliary barrier 30 between the lower insulating panel structures L. [ Further, the heat insulating panel can generally be made of a lightweight material such as a polyurethane foam which is excellent in heat insulation performance.

The lower insulating panel structure L may include a lower heat insulating panel 20 and a lower reinforcing panel 21. [ The bottom insulation panel 20 is installed on the inner surface of the outer wall 10 of the liquefied gas transportation vessel and is fixed by an epoxy mastic 11 through a lower reinforcement panel 21 And is mechanically fixed by a stud bolt 12 at the same time. The outer wall 10 can support the load of the storage fluid, and an inner hull can be used.

More specifically, the mastic 11 is adhered to the outer wall 10 after being applied to the lower surface of the lower reinforcing panel 21 with an elastic adhesive material. The mastic 11 can adjust the level difference of the lower heat insulating panel 20 and absorb the load applied to the lower heat insulating panel 20. A stud bolt 12 is welded to the inner surface of the outer wall 10 and the lower thermal insulating panel 20 forms a through hole 22 so that the stud bolt 12 can be inserted. When the stud bolt 12 is inserted into the through hole 22, the lower reinforcing panel 21 and the stud bolt 12 are firmly fixed by using the nut 13. Thereafter, a cylindrical plug 23 is inserted into the through hole 22 to finish the lower heat insulating panel 20.

The adjacent lower heat insulating panels 20 are coupled with each other with a gap therebetween and a flat joint made of glass wool is attached to the interval between the lower heat insulating panels 20 after the lower heat insulating panel 20 is fixed. ; 24) are filled.

An auxiliary barrier 30, which is made of rigid triplex or SUS (stainless steel), is attached and fixed on the lower insulating panel 20. The adjoining auxiliary wall 30 is connected by the auxiliary connecting wall 31 so that the sealing of the auxiliary wall 30 is completed. The auxiliary connection barrier 31 may be a supple triplex 31 attached to a rigid triplex 30 using epoxy glue.

The upper insulating panel structure U may include an upper insulating panel 40, a connecting panel 41, and an upper reinforcing panel 42. A top insulation panel 40 is laminated and fixed on the lower insulation panel 20 and a connection panel 41 (or a top bridge panel) is installed between the adjacent upper insulation panels 40 . The connection panel 41 may be fixedly mounted on the support triplex 31 using an epoxy glue.

After the installation of the upper insulating panel 40 and the connecting panel 41 is completed, a kitchen wall 50 using a metal membrane is mounted on the upper insulating panel 40 and the connecting panel 41 with an anchor strip (not shown) And thus the cargo window is completed. The kitchen wall 50 can be fixed on the upper insulating panel 40 and the connecting panel 41 via the upper reinforcing panel 42. [

The upper insulating panel 40 may include slits 43 at regular intervals. The thermal stress applied to the upper heat insulating panel 40 can be eliminated and the durability can be improved.

The kitchen wall 50 is for airtightly protecting the heat insulating panel structures (U, L) from the liquefied gas, and a plurality of sheets are joined by welding or the like to block the heat insulating panel structures (U, L) from the liquefied gas. Although the kitchen wall 50 can use various materials, generally stainless steel (SUS) or aluminum can be used.

Next, the corrugated portion of the barrier wall will be described with reference to Fig. 2 is a perspective view showing a corrugated portion connecting structure of a corner portion of a general cargo hold.

The kitchen wall 50 is of a metallic material that is in direct contact with the cryogenic liquefied gas and is subject to large thermal stress. Thus, the kitchen wall 50 may include two-directional folds 52 (52a, 52b) that intersect each other to relieve thermal stress. For example, the kitchen wall 50 includes a planar portion 51, a first wrinkle portion 52 that is bent in the direction from the planar portion 51 toward the accommodation space and arranged in different directions to facilitate shrinking or stretching by thermal deformation, And a crossing portion 52c in which the first wrinkle portion 52a and the second wrinkle portion 52b and the two directional wrinkles 52a and 52b intersect each other. Hereinafter, the corrugated portion 52 includes the intersection 52c. The intersection portion 52c is also a portion where the two folding portions 52a and 52b meet each other.

In the drawings of the present invention, two-directional wrinkles 52a and 52b arranged vertically to each other are shown, but may include three or more wrinkles as necessary. For example, the three corrugations may be arranged at an angle of 60 degrees with respect to each other.

The thermal stress acting in the in-plane direction of the kitchen wall 50 can be eliminated by the two-direction wrinkles 52a and 52b. Since the corrugated portion 52 has a room for deformation in the width direction, the corrugated portion 52 can cope with thermal stress. The thermal stress acting in the longitudinal direction of the first corrugated portion 52a is eliminated by the stretchability of the second corrugated portion 52b and the thermal stress acting in the longitudinal direction of the second corrugated portion 52b is reduced, Can be solved by the elasticity of the elastic member 52a.

Next, the connection structure of the corrugated part of the corner portion of a general cargo hold will be described with reference to FIG.

The adiabatic panel structure includes a flat panel panel provided on a flat surface portion and a corner panel (60) provided on a corner portion. The barrier also includes a flat barrier fixed on the flat panel and a corner barrier (54) secured on the corner panel (60).

As shown in FIG. 2, the corrugated portions 52 of the flat plate walls disposed on both sides of the general cargo hold with the corner wall 54 therebetween are connected to each other by the corrugated portion 55 of the corner wall. However, in order to arrange the corrugated portion 55 of the corner barrier wall and the corrugated portion 52 of the flat wall barrier to each other, it is necessary to perform a separate marking operation, and a problem that the operation difficulty is high and the installation period is long Lt; / RTI >

Hereinafter, the connection structure of the corrugated part of the corner portion of the cargo hold 100 according to the embodiment of the present invention will be described with reference to FIG. 3 to FIG. FIG. 3 is a perspective view showing a corrugated portion connecting structure of a corner portion of the cargo hold 100 according to an embodiment of the present invention, and FIG. 4 is an exploded perspective view showing a corrugated portion connecting structure of FIG. 5 is a perspective view showing a connection structure of the corrugated portion of the corner portion of the cargo hold 100-1 according to another embodiment of the present invention, and FIG. 6 is an exploded perspective view showing the connection structure of the corrugated portion of FIG.

The barrier according to an embodiment of the present invention includes a flat barrier 101 fixed on a flat panel and a corner barrier 102 fixed on the corner panel 60. [

The cargo hold 100 according to the embodiment of the present invention is disposed such that at least one of the corrugations 101a of the flat wall disposed on both sides of the corner wall 102 is offset from the corrugated portion 110 of the corner barrier. At this time, the ends of the wrinkles 101a or 110 arranged to be shifted can be connected to the flat portion 101b or 102a of the adjacent barrier 101 or 102 to maintain a sealed state.

The walls of the cargo hold 100 according to the embodiment of the present invention shown in FIG. 3 are formed such that the corrugations 101a of the flat wall arranged on both sides of the corner wall 102 are deviated from the corrugations 110 of the corner wall And the both ends of the corrugated portion 110 of the corner barrier wall are also arranged so as to be offset from the corrugated portion 101a of the flat wall.

5, the corrugation 101a of the flat wall disposed at one side of the corner wall 102 may be divided into the corrugated portion 110 of the corner wall, And the corrugated portion 101c of the flat plate wall disposed at the other side is arranged to be connected to the corrugated portion 110 of the corner barrier. Likewise, one end of the corrugated portion 110 of the corner barrier wall is disposed to be offset from the corrugated portion 101a of the flat wall, and the other end is connected to the corrugated portion 101c of the flat wall.

The corrugated portion 101a of the flat plate wall and the corrugated portion 110 of the corner wall are arranged so as to be shifted from each other to save labor and time required to align the corrugated portion 101a of the flat plate wall with the corrugated portion 110 of the corner wall can do. Although the wall of the cargo hold 100 according to another embodiment of the present invention shown in FIG. 5 has the corrugated portion 101c of the flat wall disposed at one side thereof connected to the corrugated portion 110 of the corner wall, The corrugated portion 101a of the flat plate wall disposed on the other side is disposed to be offset from the corrugated portion 110 of the corner wall so that the corrugated portion 101a of the flat plate wall and the corrugated portion 110 ≪ RTI ID = 0.0 > and / or < / RTI > Therefore, in any case, there is an advantage in that it can be easily manufactured when compared with the connection structure of the corrugated portion of the corner portion of the general cargo hold 100.

Since the corrugated portion 52 of the flat plate wall of the cargo hold shown in FIG. 2 is connected to the corrugated portion 55 of the corner wall, it is possible to maintain the sealed state of the barrier wall. However, Since the flat wall of the hold 100 and the corrugations 101a and 110 of the corner barrier are arranged to be offset from each other, it is necessary to seal the ends of the corrugations 101a and 110 and seal them. The wrinkle portion is usually formed to bend in the barrier sheet. Therefore, when the wrinkle portion and the flat portion meet, the space (see 53 in Fig. 1) of the wrinkle portion is exposed to the outside. When the space of the corrugated portion is exposed, it is not possible to seal the barrier for blocking the heat insulating panel structure from the outside, so that the end of the opened corrugated portion needs to be closed.

The edge portions of the corrugated portion 110 of the corner barrier wall which are arranged so as to be shifted to maintain the sealing state of the corrugated portion are connected to the flat portion 101b of the adjacent flat wall 101, 101a may be connected to the flat surface portion 102a of the adjacent corner barrier wall 102. [

For this, an end portion of the corrugated barrel which is disposed so as to be shifted from the corrugated portion 101a of the flat plate barrier in both ends of the corrugated portion 110 can be closed by the first end cap 111 to maintain the sealed state, The side plate 111 may be fixed on one end of the corrugation 110 of the corner barrier and the other side thereof may be fixed on the flat plate 101.

The end portion of the end portion of the corrugated portion 101a of the flat plate wall that is disposed so as to be offset from the corrugated portion 110 of the corner barrier can be closed by the second end cap 112 to maintain the sealed state, (112) can be fixed on one end of the corrugation part (101a) of the flat plate wall and the other side can be fixed on the corner wall (102).

The first end cap 111 and the second end cap 112 may include a step for airtight contact with the barrier. The corner barriers 102 and the flat barriers 101 may be joined by welding or the like in a state where a part of the corner portions are overlapped. In this case, a step is generated in the overlapping portion. The first and second end caps 111 and 112 may hermetically contact the barrier wall having a different height, including a step corresponding to the stepped portion.

In the figure, separate end caps 111 and 112 are shown mounted and fixed on the barrier. Alternatively, the barrier cap and the end cap are integrally formed. That is, the corrugated portion 101a of the flat plate barrier can be closed while converging on the flat portion 101b without continuing to the corners, and the corrugated portion 110 of the corner barrier is closed so that both ends converge on the flat portion 102a . However, in the case where the end caps 111 and 112 are provided by separate members, efforts and costs for forming the corrugations 101a and 110 of the barrier ribs can be reduced.

FIG. 4 shows a corner panel 60 in which slits 61 are formed at regular intervals. The slit 42 of the upper insulating panel 40 described in Fig. 1 can also be applied to the corner panel 60. Fig. The slit 61 in FIG. 4 includes a gap between the adjacent slit and the adjacent corner panel 60 on the top of the corner panel 60. The thermal stress applied to the corner panel 60 in the longitudinal direction of the corner portion by the slit 61 can be relieved.

The corner barrier 102 may include a continuously extending planar portion 102a and a corrugated portion 110 of a corner barrier provided in a gap 102b between two adjacent planar portions 102a. The corner barriers 102 may be respectively attached on a unit corner panel in which a flat portion 102a provided by a flat sheet is divided by a slit 61. [ Therefore, a gap 102b can also be formed between the planar portions 102a of the adjacent corner barriers.

The corrugated portion 110 of the corner barrier may be provided so as to cover the slit 61 and may be attached on the flat portion 102a of the adjacent corner barrier at both side ends thereof. The corner barriers 102 of the corner barriers can relieve the thermal stress acting in the width direction of the corrugations 110 of the corner barriers while maintaining airtightness. Both ends of the corrugated portion 110 of the corner barrier can be closed by the first end cap 111. [

7 is an exploded perspective view showing a coupling structure of the corrugation 52 of the corner portion of the cargo hold 100-2 including the cutouts 113 and 114. As shown in Fig.

The flat end wall 101 may include a first cutout 113 at an edge that meets the corrugation 110 of the corner barrie and the first end cap 111 may include a corrugated portion 110 on one side, And the other side is fixed on the flat plate wall 101 to close the end of the corrugated portion 110 of the corner barriers to keep the corner barriers 102 in a sealed state, Can be accommodated therein.

The first incision part 113 can relieve the thermal stress acting on the first end cap 111. When the thermal stress acts in the longitudinal direction of the corner (or the width direction of the corrugated portion 110 of the corner barrier), the interval between the flat portions 102a of the corner barrier may be varied, and the corrugated portion 110 of the corner barrier may have a width By changing the directional displacement, thermal stress can be solved. The width of the first end cap connected to the corner barrier wall 102 may be varied and the width of the first end cap 113 formed on the flat barrier wall 101 may be greater than the width of the first end cap 111. [ Directional displacement can be tolerated.

Although the slit 102b of the corner barrier wall 102 and the first cutout 113 are shown to be aligned with each other in the figure, the first cutout 113 is received in the first end cap 111 Suffice. Therefore, it may not be contrary to the object of the present invention to facilitate the installation of the corner barriers 102 but eliminate the thermal stress.

The corner barriers 102 may include a second cutout 114 at an edge that meets the corrugation 101a of the plate wall and the second end cap 112 may have one side that includes the corrugations 101a of the plate wall, And the other side is fixed on the corner wall 102 to close the end of the corrugated portion 101a of the flat wall to maintain the sealing state of the flat wall 101. In the second cut portion 114, Can be accommodated therein.

The second cut portion 114 can dissipate the thermal stress acting on the second end cap 112. In the case where thermal stress acts in the width direction of the flat plate wall corrugated portion 101a, the corrugated portion 101a of the flat plate wall can relieve the thermal stress by changing the width direction displacement. The width of the second end cap 112 connected to the flat wall 101 may be varied and the width of the second end cap 114 formed on the corner wall 102 may be greater than the width of the second end cap 112. [ Directional displacement can be tolerated.

The inner end portions of the first incision portion 113 and the second incision portion 114 may be rounded. When the incision portions 113 and 114 repeatedly contract or expand, fatigue is concentrated on the incision portions 113 and 114, and a crack may occur. At this time, the ends of the cut-out portions 113 and 114 are rounded to prevent crack propagation.

8 is an exploded perspective view showing a corrugated joint structure of the corners of the cargo hold 100-3 including the corrugations 115 instead of the cutouts 113 in the flat wall 101. [

The flattened barrier 101 may include a corrugated portion 110 of the corner barrier and an extending finishing corrugation 115. The finishing corrugations 115 are integrally provided on the flat plate wall 101 and do not require a separate first end cap 111 (see FIG. 7). In addition, since the finish wrinkle part 115 can generate a displacement in the width direction and can relieve the thermal stress, the first cut-out part 113 is not required.

The corrugated portion 110 of the corner barrier wall and the finishing corrugated portion 115 of the flat wall 101 may be connected to each other to maintain a sealed state. For example, the edge portion of the corrugated portion 110 of the corner barrier may be provided to partially cover the finish wrinkle portion 115 and may be fixed by welding or the like.

The connection structure of the corners of the cargo holds 100, 100-1, 100-2, and 100-3 according to the embodiment of the present invention is applied to the cargo hold's walls and includes a main wall 50 (see FIG. 1) 30, Fig. 1). 3 to 7 illustrate embodiments that are applied to the kitchen wall 50, the above description may be similarly applied to the auxiliary barrier 30.

9 is a perspective view showing a gas flow passage of the corner portion of the cargo hold 100-4.

The corrugation portions 101a and 110 of the cargo hold 100-4 can be used as a passage through which the inspection gas for checking the airtightness of the barrier wall flows. The corner portion of the cargo hold 100-4 according to an embodiment of the present invention may include a gas flow passage 120 through which the inspection gas can flow. The gas flow passage 120 may be a recessed groove formed in the corner panel 60 so as to communicate with the lower portion of the corrugation 110 of the corner barrier.

The corrugated portion 110 of the corner barrier can be communicated through the gap 102b between the adjacent flat portion 102a of the corner barrier 102 and the gap of the slit 61 of the lower insulating panel or the adjacent lower insulating panel have. A gas flow hole 121 communicating with the gas flow passage 120 may be provided under the first end cap 111, the second end cap 112, or the finish wrinkle portion 115.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, You will understand. Accordingly, the true scope of the invention should be determined only by the appended claims.

10: outer wall, 11: mastic,
12: stud bolt, 13: nut,
20: lower insulation panel, 21: lower reinforcement panel,
22: through hole, 23: foam plug,
24: flat joint, 30: secondary barrier,
31: auxiliary connection barrier, 40: upper insulation panel,
41: connecting panel, 42: upper reinforcing panel,
43: slit, 50: kitchen wall,
51: plane portion, 52: wrinkle portion,
52a: first wrinkle portion, 52b: second wrinkle portion,
52c: intersection, 53: space,
54: Corner barrier, 55: Corner barrier,
60: corner panel, 61: slit,
100: cargo hold, 101: flat plate barrier,
102: corner barrier, 110: corners of the corner barrier,
111: first end cap, 112: second end cap,
113: first incision, 114: second incision,
115: finish wrinkle portion, 120: gas flow passage,
121: gas flow hole.

Claims (18)

A liquefied gas cargo hold for storing liquefied gas,
A heat insulating panel structure disposed on the outer wall to insulate the liquefied gas from the outside and including a flat panel and a corner panel; And
A barrier wall fixed on the heat insulating panel structure to seal the heat insulating panel structure and including a flat surface portion and a wrinkle portion,
Wherein at least one of the corrugations of the flat panel wall fixed on the flat panel at both sides of the corner panel is arranged to be offset from the corrugation of the corner barrier fixed on the corner panel,
And the end portion of the wrinkled portion disposed to be shifted is connected to the flat portion of the adjacent barrier wall to maintain the sealed state. The method according to claim 1,
Wherein the edge portion of the corrugated portion of the corner barrier arranged to be shifted is connected to the flat portion of the adjacent flat plate barrier to maintain a sealed state,
And the end of the wrinkle portion of the flat plate barrier arranged to be shifted is connected to the flat portion of the adjacent corner barrier to maintain the sealed state. 3. The method of claim 2,
And both ends of the corrugated portion of the corner barrier wall are disposed to be flush with the corrugations of the flat wall. 3. The method of claim 2,
Wherein one end of the corrugated portion of the corner barrier is connected to the corrugation of the flat plate barrier and the other end is disposed to be offset from the corrugation of the flat plate barrier. 5. The method according to any one of claims 1 to 4,
And an end portion of the corrugated portion of the corner barrier arranged so as to be offset from the corrugated portion of the flat plate wall is closed by the first end cap to maintain the sealed state. 6. The method of claim 5,
Wherein the first end cap is fixed on one end of the corrugation of the corner barrier at one side and the other end is fixed atop the flat barrier. 5. The method according to any one of claims 1 to 4,
And an end portion of the end portion of the corrugated portion of the flat barriers disposed so as to be offset from the corrugated portion of the corner barrier is closed by the second end cap to maintain the sealed state. 8. The method of claim 7,
Wherein the second end cap has one side fixed on an end of the corrugation of the flat wall and the other side fixed on the corner barrier. 3. The method according to claim 1 or 2,
Wherein the corner barrier comprises a planar portion continuously disposed and a corrugation of a corner barrier provided in a gap between the adjacent two planar portions. 10. The method of claim 9,
Wherein the corner barrier further comprises a first end cap to close the end of the corrugation of the corner barrier to maintain a sealed condition. 10. The method of claim 9,
Wherein the flat barrier comprises a first incision at an edge that meets the corrugation of the corner barrier. 12. The method of claim 11,
Wherein the corner barrier is fixed on one end of the corrugation of the corner barrier and the other side is fixed on the flat barrier to close an end of the corrugation of the corner barrier to maintain the sealing state of the corner barrier, A liquefied gas hold comprising a first end cap for receiving an incision therein. 10. The method of claim 9,
Wherein the corner barrier comprises a second cut at an edge that meets the corrugation of the flattened barrier. 14. The method of claim 13,
Wherein the flat barriers are fixed on one end of the corrugations of the flat barriers and the other side is fixed on the corner barriers to close end portions of the corrugations of the flat barriers to maintain the flat barriers in a sealed state, And a second end cap for receiving the cut-out portion therein. 10. The method of claim 9,
Wherein the flat barriers include a corrugation of the corner barrier and an extended finish wrinkle. The method according to claim 1,
And a gas flow passage communicating with a space inside the corrugated portion arranged to be shifted and provided with an inspection gas for checking the airtightness of the barrier is provided on the upper part of the heat insulating panel structure. A method of manufacturing a liquefied gas holding window for storing liquefied gas,
Wherein a flat panel panel is provided on a flat surface, a corner panel is provided between flat panel panels arranged in different directions,
A barrier wall including a flat surface portion and a wrinkle portion is provided on the heat insulating panel structure, a flat panel barrier is provided on the flat panel panel, a corner barrier is provided on the corner panel,
Wherein the flat barriers and the corner barriers are disposed such that the corrugations of the flat barriers and the corrugations of the corner barriers are offset from each other. 18. The method of claim 17,
And the closed end of the folded wrinkle portion is closed to maintain the sealed state of the barrier.

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