KR101390308B1 - Cargo tank and manufacturing method thereof - Google Patents

Abstract

A cargo hold and a method of manufacturing the same are disclosed. According to an embodiment of the present invention, the cargo hold has a primary barrier having a corrugated region, and has a corrugated region corresponding to the primary barrier to be spaced apart from the primary barrier to form a barrier space between the primary barrier. A liquefied gas barrier portion having a secondary barrier; A deformation prevention part disposed in the barrier space of the liquefied gas barrier part to absorb and block an impact; And a heat insulation wall portion provided and disposed between the hull in which the liquefied gas barrier portion is disposed and the liquefied gas barrier portion.

Description

Cargo hold and manufacturing method {CARGO TANK AND MANUFACTURING METHOD THEREOF}

The present invention relates to a cargo hold and a method for manufacturing the same, and more particularly, a gas carrier, a floating offshore structure (LNG) for carrying liquefied natural gas (LNG), liquefied petroleum gas (LPG), or the like. The present invention relates to a cargo hold for storing a gas (including a liquid state) in an FPSO, LNG-FSRU) and an LNG regasification vessel (LNG-RV), and a manufacturing method thereof.

Gas carriers are vessels designed to carry liquefied natural gas (LNG) or liquefied ammonia, ethylene, liquefied petroleum gas (LPG), and the like.

Since gas occupies much less volume in the liquefied state than in the gaseous state, the cargo hold must be kept at high and low temperatures to prevent vaporization.

Therefore, the cargo hold of ship should be made of special material that can withstand the stress from high pressure and low temperature, and should be equipped with refrigeration system and insulation structure to keep low temperature.

Liquefied petroleum gas (LPG) is typical of propane gas (boiling point -42 ℃) and butane gas (boiling point -5 ℃) and pressurized (liquefied by increasing pressure at room temperature) and low temperature (at atmospheric pressure) according to the method of liquefying gas. Liquefy by lowering the temperature in the air).

Liquefied natural gas (LNG) is also called Liquefied Methane Gas (LMG) because methane (boiling point -162 ℃) is the main component and accounts for more than 90%. The volume of liquefied methane is reduced to one-sixth of the gas-state volume and the specific gravity is about 0.42. Liquefied natural gas (LNG) carriers carrying these gases require significantly higher drying techniques.

Liquefied natural gas (LNG) carriers transport large volumes of liquefied natural gas (LNG) from liquefied natural gas (LNG) production bases to acquisition sites in order to use these gases as energy sources as liquefied natural gas emerges as energy resources. do.

However, the cargo hold of such a LNG carrier is very demanding because it needs to be able to store and store the LNG, which is liquefied at an almost cryogenic state.

That is, since liquefied natural gas has a vapor pressure higher than atmospheric pressure and a boiling temperature of about 163 ° C., a cargo hold for safely storing and storing such liquefied natural gas is a material that can withstand cryogenic temperatures, such as aluminum. It must be made of steel, stainless steel, 36% nickel steel, etc., and is made of a unique insulating structure that is resistant to other thermal stresses and heat shrinkages and prevents heat ingress.

Here, the cargo hold applied in the LNG carrier is composed of a primary barrier, a secondary barrier, and an insulator to safely transport cryogenic cargo to its destination. In particular, primary and secondary barriers require a high degree of tightness for cryogenic cargo.

The primary barrier is hermetic by welding, and there is a corrugation that acts as a shrinkage / expansion for cryogenic cargo, which has a round profile.

In addition, the secondary barrier is a triple structure of glass cloth and aluminum foil, and airtightness must be secured by bonding between the triple structures.

This conventional cargo hold is due to the complexities of complex welding and bonding operations for the primary barrier, secondary barrier, and insulation, and the fabrication structure that allows the insulation to be placed between the primary and secondary barriers. When the impact on the primary barrier is applied, there is a problem that a minute leakage occurs in the welding or bonding portion of the primary and secondary barriers.

Korea Patent Publication No. 10-2011-00050239 (Daewoo Shipbuilding & Marine Engineering Co., Ltd.) 2011.05.13 Korean Patent Publication No. 10-2011-0019999 (Samsung Heavy Industries Co., Ltd.) 2011.03.02

One embodiment of the present invention to properly absorb and disperse vibration and shock applied to the primary and secondary barriers coupled to the interior of the cargo hold to safely store and safely transport the liquefied gas in the cargo hold, It is an object of the present invention to provide a cargo hold and a method of manufacturing the same, which can prevent leakage caused by fracture or cracking of a welding or bonding site.

According to an aspect of the present invention, the secondary barrier having a waveform region and the secondary barrier having a waveform region corresponding to the primary barrier and spaced apart from the primary barrier to form a barrier space between the primary barrier and the primary barrier. Liquefied gas barrier unit having a barrier; A deformation prevention part disposed in the barrier space of the liquefied gas barrier part to absorb and block an impact; A hull in which the liquefied gas barrier is disposed; And it may provide a cargo hold including a heat insulation wall portion provided provided between the liquefied gas barrier portion.

The cross section of the waveform region may have a trapezoidal shape.

The trapezoidal shape is formed such that the width gradually becomes narrower toward the top, the edge of the trapezoidal shape may be rounded.

At least one of the primary barrier and the secondary barrier may be made of stainless steel or stainless alloy, and may include a plurality of unit barrier panels joined to each other by overlapping welding.

The deformation preventing part may include a spacer spaced apart from the primary barrier and the secondary barrier.

The spacer may include: a first plywood member disposed in the trapezoidal upper space of the barrier space and formed of fly wood; A reinforcement foam member disposed in the trapezoidal side space of the barrier space and provided as a reinforcement foam; And a second plywood member disposed in the barrier space except for the trapezoidal shape among the barrier spaces and provided as the fly wood.

The insulating wall portion, the upper layer member coupled to the liquefied gas barrier portion; A lower layer member coupled to the hull; And a heat insulation layer member disposed between the upper layer member and the lower layer member and coupled to the upper layer member and the lower layer member.

According to an aspect of the invention, the step of providing a heat insulating wall portion coupled to the hull; Installing the heat insulation wall part in the hull; Coupling a secondary barrier having a corrugated region to the insulating wall portion; Coupling a strain relief to the secondary barrier to absorb shock; And coupling the primary barrier having the waveform region to the deformation preventing unit to correspond to the secondary barrier.

The insulating wall portion, the upper layer member coupled to the liquefied gas barrier portion; A lower layer member coupled to the hull; And an insulation layer member disposed between the upper layer member and the lower layer member and coupled to the upper layer member and the lower layer member, wherein the insulation wall portion is integrally coupled to the upper layer member, the lower layer member, and the insulation layer member. Can be installed on

The cross section of the corrugated region has a trapezoidal shape, and the deformation preventing part includes a spacer installed to space the primary barrier and the secondary barrier from each other, and the installing of the spacer may include an upper portion of the trapezoidal shape. Engaging a first flywood member provided with a fly wood; Coupling a reinforcement foam member provided with a reinforcement foam to a side of the trapezoidal shape; And coupling a second flywood member provided with the flywood to the secondary barrier except for the trapezoidal shape.

According to an embodiment of the present invention, the liquefied gas barrier by arranging a barrier space and the deformation prevention portion between the primary barrier and the secondary barrier coupled to the inside of the cargo hold to safely store and safely transport the liquefied gas in the cargo hold By appropriately absorbing and dispersing vibrations and shocks applied to the device, it is possible to prevent breakage caused by fatigue or leakage caused by cracks in the welding or bonding areas, and the trapezoidal shape in which the conventional primary barrier waveform area is applied to the container box. In addition to improving the angular shape of the shape and at the same time round the corner portion to prevent brittle fracture due to thermal stress can provide a cargo hold having a structure resistant to impact in the cryogenic state and easy to manufacture and its manufacturing method.

1 is a partial perspective view showing a cross section of the cargo hold according to an embodiment of the present invention.
2 is a front view of Fig.
3 is an enlarged view of the waveform region of FIG. 1.
4 is a flow chart of the cargo hold manufacturing method according to an embodiment of the present invention.

In order to fully understand the present invention, operational advantages of the present invention, and objects achieved by the practice of the present invention, reference should be made to the accompanying drawings and the accompanying drawings which illustrate preferred embodiments of the present invention.

The present invention is a gas carrier that carries liquefied natural gas (LNG) or liquefied petroleum gas (LPG), floating marine structures (LNG-FPSO, LNG-FSRU) and LNG regasification vessel (LNG). -VV may be applied to the cargo hold for storing gas (including liquid state), but for the convenience of description, the following description will be given by taking a gas carrier, particularly a LNG carrier. . Here, in order to facilitate the understanding and explanation of the present invention, a cargo hold provided in a LNG carrier is described as an example, but as described above, the present invention is not limited thereto.

Hereinafter, the present invention will be described in detail with reference to the embodiments of the present invention with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements.

1 is a partial perspective view showing a cross section of the cargo hold according to an embodiment of the present invention, Figure 2 is a front view of Figure 1, Figure 3 is an enlarged view of the waveform region of Figure 1.

1 to 3, the cargo hold according to an embodiment of the present invention has a corrugated region 100 corresponding to a primary barrier 101 having a corrugated region 100 and a primary barrier 101. Liquefied gas barrier unit 110, liquefied gas barrier unit having a secondary barrier 102, which is spaced apart from the primary barrier 101 and forms a barrier space 105 between the primary barrier 101 The deformation preventing part 115 disposed in the barrier space 105 of the 110 to absorb and block an impact, and between the hull 150 and the liquefied gas barrier part 110 in which the liquefied gas barrier part 110 is disposed. And a heat insulation wall portion 120 provided and disposed.

In the cargo hold according to the present embodiment, the secondary barrier 102 having the same structure is disposed directly below the primary barrier 101, and the deformation preventing unit 115 is disposed therebetween, thereby deforming the primary barrier 101. Supported and buffered by the preventer 115, the secondary barrier 102 receives the shock applied to the primary barrier 101 in a damped state by the strain preventer 115. That is, the shock applied to the primary barrier 101 may be absorbed by the deformation preventing unit 115, is transmitted to the secondary barrier 102 in an attenuated state, and is dispersed and dissipated through the secondary barrier 102. .

According to this embodiment, the liquefied gas barrier unit 110 may have a double panel structure consisting of the primary barrier 101 and the secondary barrier 102, but is not limited thereto, and the primary barrier 101 Depending on the amount of impact applied through the third barrier (not shown) or may further include a fourth barrier (not shown).

At this time, between the secondary barrier 102 and the third barrier (not shown) or the fourth barrier (not shown) may be filled with the deformation preventing part 115 using various materials, or a simple support structure may be disposed. In addition, a variety of structures may be adopted for the deformation preventing unit 115 according to the present embodiment. For example, a structure such as a honeycomb may be adopted.

According to the present embodiment, unlike the conventional cargo hold structure, the heat insulation wall part 120 does not exist between the primary barrier 101 and the secondary barrier 102, and may be disposed below the secondary barrier 102. Before the construction of the primary barrier 101 and the secondary barrier 102 on the hull 150, it may be prepared and provided in one piece in advance in another place, thereby providing convenience in construction.

The liquefied gas barrier unit 110 is manufactured by combining the primary barrier 101 and the secondary barrier 102 having the corrugated region 100, and the cross section of the corrugated region 100 has a trapezoidal shape 122. It may be. At this time, the trapezoidal shape 122 is formed to gradually narrow the width toward the top, the edge 123 of the trapezoidal shape 122 is rounded.

The liquefied gas barrier unit 110 is a wall unit for barriering the liquefied gas stored in the cargo hold. Cargo sloshing liquefied gas fluttering during operation of the vessel may continuously impact the liquefied gas barrier unit 110. At this time, the contact portion of the liquefied gas barrier portion 110 in contact with the liquefied gas is formed in the waveform region 100 of the trapezoidal shape 122, it can disperse and absorb the impact when the liquefied gas collides. In addition, the liquefied gas barrier unit 110 in which the waveform region 100 of the trapezoidal shape 122 is formed provides a structure in which bending rigidity is enhanced along the direction of the waveform region 100.

The corrugated region 100 of the liquefied gas barrier unit 110 is formed by overlapping the corrugated region 100 of the primary barrier 101 and the secondary barrier 102 to provide a firm impact against the impact of the liquefied gas. Absorption and support structures can be provided. At this time, the trapezoidal shape 122 can be easily formed in the primary barrier 101 and the secondary barrier 102 made of a metal material, it can provide the efficiency of mass production. That is, the primary barrier 101 and the secondary barrier 102 may be manufactured by plastic working using a die (not shown) in which a trapezoidal shape 122 is formed-pressing or rolling a metal sheet.

According to the present embodiment, the trapezoidal shape 122 has a shape that is formed to become narrower gradually toward the upper portion than the shape formed with the width of the upper portion wider than the lower portion, and is easily processed by plastic, and the impact applied to the upper portion gradually widens from the upper portion to the lower portion. It can provide a stable structure that can be easily dispersed and absorbed.

In addition, since the edge 123 of the trapezoidal shape 122 is rounded, brittle fracture due to thermal stress or the like can be prevented. The liquefied gas is stored in the cargo hold in a cryogenic state to contact the trapezoidal shape 122, the cryogenic state provides an extreme environment that can be easily broken in shock than room temperature or low temperature. At this time, since the round shape processed one step can alleviate the stress concentration, rather than the angular shape that can be easily broken by the impact due to the stress concentration, the trapezoidal shape 122 can be prevented from cryogenic brittle fracture.

According to the present embodiment, at least one of the primary barrier 101 and the secondary barrier 102 of the liquefied gas barrier unit 110 is made of stainless steel or stainless alloy steel. In this case, the primary barrier may be essentially made of stainless steel or stainless alloy, but is not limited thereto, and other types of materials may be applicable.

At this time, the primary barrier 101 and the secondary barrier 102 are combined into one wall. The primary barrier 101 and the secondary barrier 102 include a plurality of unit barrier panels 125 that are coupled to each other by overlapping welding in an adjacently arranged state. That is, the plurality of unit barrier panels 125 may be overlapped and welded to form the primary barrier 101 or the secondary barrier 102.

The unit barrier panel 125 is a state in which the corrugated region 100 of the trapezoidal shape 122 is formed by plastic working, and the boundary portion thereof is joined by overlapping welding to form one barrier. The overlapping welding is a welding method in which a welding material is overlapped with a welding portion of the unit barrier panel 125 buttted as a base material.

The deformation preventing part 115 includes a spacer 127 spaced apart from the primary barrier 101 and the secondary barrier 102. According to the present embodiment, the spacer 127 is disposed in the upper space 129 of the trapezoidal shape 122 among the barrier spaces 105 of the liquefied gas barrier part 110, and is provided as fly wood. The reinforcement foam member 133 disposed in the side space 132 of the trapezoidal shape 122 of the barrier space 105 and the reinforcement foam and the trapezoid of the barrier space 105. The second flywood member 135 is disposed in the barrier space 105 except for the shape 122 and is formed of fly wood.

Deformation preventing portion 115 is a spacer 127, the primary barrier 101 on the secondary barrier 102 by filling the barrier space 105 formed between the primary barrier 101 and the secondary barrier 102. ) And provide a structure for absorbing and blocking shocks. According to this embodiment, plywood and reinforcement foams are adopted as the shock absorbing and blocking material, but other wood having similar insulation and rigidity. However, the foam material or other alternative material may be selected, but is not necessarily limited thereto.

In particular, the upper space 129 of the trapezoidal shape 122 is subjected to the impact of the liquefied gas at the forefront, the first plywood member 131 disposed in the upper space 129 is provided as a plywood, the upper space 129 By stacking along the bending rigidity against the impact applied in a direction crossing the upper space 129 relatively.

In addition, the reinforcement foam member 133 provided as a reinforcement foam in the side space 132 of the trapezoidal shape 122 not only supports the primary barrier 101 to the secondary barrier 102, but also the secondary barrier ( 102 has a structure capable of absorbing the shock transmitted to, and absorbs the shock transmitted to the lower portion from the upper space 129 side.

In addition, the second plywood member 135, which is provided as a plywood in the remaining barrier space except the upper space 129 and the side space 132, is disposed in the widest area, so that the primary barrier 101 is the secondary barrier. It is to support the (102), by combining the primary barrier 101 and the secondary barrier 102 to perform the role of the liquefied gas barrier unit 110, and secondary from the primary barrier (101) Impact delivered to the barrier 102 may be attenuated or blocked.

The heat insulation wall part 120 includes an upper layer member 141 coupled to the liquefied gas barrier unit 110, a lower layer member 142 coupled to the hull 150, and an upper layer member 141 and the lower layer member 142. It is disposed in the upper layer member 141 and the lower layer member 142 includes a heat insulating layer member 143. According to the present embodiment, the heat insulation wall part 120 is provided in a three-layer structure, but is not limited thereto, and is provided in a multi-layer structure in which a plurality of heat insulators are provided in preparation for a cryogenic state, so as to store liquefied gas stored in a cargo hold. It is possible if the structure that can keep the liquefied gas in a cryogenic state by blocking the external heat.

In addition, according to the present embodiment, the upper layer member 141 and the lower layer member 142 may be provided using a plywood material, and the heat insulating layer member 143 may be provided using a reinforced foam material. At this time, the heat insulation wall portion 120 according to the present embodiment, but the plywood or reinforced foam is selected as the material, but other wood or foam material or other alternative material having similar insulation and rigidity can be selected, but not necessarily limited thereto. Does not.

As such, the cargo hold according to the present embodiment improves the conventional primary barrier 101 corrugated region 100 (Corrugation) to a trapezoidal angular shape applied to a container box and is subjected to thermal stress. In order to prevent brittle fracture due to the rounded corner portion 123, it is possible to provide a structure resistant to impact and easy to manufacture.

In addition, in the case of the secondary barrier 102, by applying a secondary barrier 102 composed of a conventional triplex (metal, SUS304L or alloy steel) of the same metal as the primary barrier 101, the airtightness Since it is improved and positioned below the primary barrier 101 and coupled to the heat insulation wall 120, it is possible to provide a structure that is easy to construct.

In addition, the barrier space 105 of the primary barrier 101 and the secondary barrier 102 may be formed by applying a spacer 127 such as plywood and polyurethane foam (PUF). A role of improving load bearing and strength of the primary barrier 101 can be expected.

In the case of the heat insulation wall part 120, since the internal secondary barrier 102 is eliminated as in the prior art, the division of the top / bottom pad is eliminated, so that an integral structure can be applied, and thus the pre-fabrication is performed in advance. Provides an installation advantage that can be coupled to the cargo hold wall directly at the construction site.

Hereinafter, a method of manufacturing a cargo hold according to an embodiment of the present invention will be described in detail.

4 is a flow chart of the cargo hold manufacturing method according to an embodiment of the present invention.

1 to 4, according to one embodiment of the present invention, the method of manufacturing a cargo hold includes providing a heat insulation wall part 120 coupled to the hull 150 (S10) and a heat insulation wall part 120. Installing in the hull 150 (S20), and the step (S30) for coupling the secondary barrier 102 having the corrugated region 100 to the thermal insulation wall portion 120, and the deformation preventing portion for absorbing the impact ( Coupling the 115 to the secondary barrier 102 (S40), and coupling the primary barrier 101 having the corrugated region 100 to the deformation preventing unit 115 corresponding to the secondary barrier 102. Step S50 is included.

In the method of manufacturing a cargo hold according to an embodiment of the present invention, first, a step (S10) of providing a heat insulation wall part 120 is performed, and then, a step (S20) of installing the heat insulation wall part 120 on the hull 150 is performed. Is performed.

As described above, the heat insulation wall part 120 includes an upper layer member 141 coupled to the liquefied gas barrier 110, a lower layer member 142 coupled to the hull 150, an upper layer member 141, and a lower layer member. The insulating layer member 143 is disposed between the upper and lower layers 141 and 142, and the insulating layer member 143 is coupled to the upper layer member 141 and the lower layer member 142.

Subsequently, a step (S20) of installing the heat insulation wall part 120 to the hull 150 is performed, wherein the heat insulation wall part 120 is integrally formed with the upper layer member 141, the lower layer member 142, and the heat insulation layer member 143. Installed in the hull 150 in a coupled state. At this time, the method of attaching the insulation wall is not limited to a specific method, and various methods of attachment such as a bonding method / bolt nut using method may be applied. According to the present embodiment, the primary barrier 101 and the secondary barrier 102 are manufactured so that the cross section of the waveform region 100 has a trapezoidal shape 122.

Thereafter, the step S30 of coupling the secondary barrier 102 having the corrugated region 100 to the thermal insulation wall portion 120 is performed, and then the secondary barrier 102 is provided with the deformation preventing portion 115 for absorbing the impact. Step S40 is performed.

In the step S40 of coupling the deformation preventing part 115 to the secondary barrier 102 according to the present embodiment, a spacer 127 is installed to space the primary barrier 101 and the secondary barrier 102 apart from each other. It includes a step. At this time, the step of installing the spacer 127, the step of coupling the first flywood member 131, which is provided with a fly wood (fly wood) on the upper portion of the trapezoidal shape 122, and on the side of the trapezoidal shape (122) Coupling the reinforcement foam member 133 formed of the reinforcement foam, and coupling the second plywood member 135 formed of fly wood to the secondary barrier 102 excluding the trapezoidal shape 122. It comprises the step of.

Thereafter, the step S50 of coupling the primary barrier 101 having the corrugated region 100 to the deformation preventing unit 115 to correspond to the secondary barrier 102 is performed, thereby providing a method of manufacturing a cargo hold according to the present embodiment. The main process is completed.

Such a cargo hold manufacturing method according to the present embodiment can be more easily produced in the fabrication step of the supplier (Fabrication) due to the corrugation shape (100, Corrugation) shape of the simple trapezoidal shape 122, 100, Corrugation shape can reduce deformation due to cargo sloshing.

In addition, the airtightness can be improved by changing the secondary barrier 102 to a metal material (metal, SUS304L), or the like by bonding to a weld joint, and between the primary barrier 101 and the secondary barrier 102. Deformation due to cargo sloshing can be reduced by applying a spacer 127 to the spacer.

In addition, although not shown, due to the secondary barrier is not applied between the top / bottom pad (Top / Bottom Pad), unlike the conventional heat insulating wall 120, the top / bottom pad (Top / Bottom Pad) It is possible to manufacture and install in one piece without distinction.

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 or scope of the invention. Accordingly, such modifications or variations are intended to fall within the scope of the appended claims.

100: waveform region 101: primary barrier
102: secondary barrier 105: barrier space
110: liquefied gas barrier portion 115: deformation preventing portion
120: heat insulation wall 122: trapezoidal shape
123: corner 125: unit barrier panel
127: spacer 129: upper space
131: first plywood member 132: side space
133: reinforced foam member 135: second plywood member
141: upper layer member 142: lower layer member
143: heat insulating layer member 150: hull

Claims (10)

Liquefied gas barrier section having a primary barrier having a corrugated region and a secondary barrier having a corrugated region corresponding to the primary barrier and spaced apart from the primary barrier to form a barrier space between the primary barrier and the primary barrier. ;
A deformation prevention part disposed in the barrier space of the liquefied gas barrier part to absorb and block an impact;
A hull in which the liquefied gas barrier is disposed; And
A heat insulation wall portion provided and disposed between the liquefied gas barrier portion and the hull,
The cross section of the waveform region has a trapezoidal shape,
The deformation preventing part includes a spacer spaced apart from the primary barrier and the secondary barrier,
The spacer
A first flywood member disposed in the trapezoidal upper space of the barrier space and provided as a flywood;
A reinforcement foam member disposed in the trapezoidal side space of the barrier space and provided as a reinforcement foam; And
A cargo hold including a second plywood member disposed in the barrier space except for the trapezoidal shape among the barrier spaces and provided as the flywood. delete The method of claim 1,
The trapezoidal shape is formed to gradually narrow the width toward the top,
The trapezoidal shape is round the cargo hold. The method of claim 1,
At least one of the primary barrier and the secondary barrier is a cargo hold comprising a plurality of unit barrier panels are made of stainless steel or stainless steel alloy, and coupled to each other by overlapping welding. delete delete The method of claim 1,
The heat insulation wall part,
An upper layer member coupled to the liquefied gas barrier;
A lower layer member coupled to the hull; And
A cargo hold comprising a heat insulation layer member disposed between the upper layer member and the lower layer member and coupled to the upper layer member and the lower layer member. Providing a thermal insulation wall coupled to the hull;
Installing the heat insulation wall part in the hull;
Coupling a secondary barrier having a corrugated region to the insulating wall portion;
Coupling a strain relief to the secondary barrier to absorb shock; And
Coupling a primary barrier having a corrugated region to the strain relief to correspond to the secondary barrier,
The cross section of the waveform region has a trapezoidal shape,
The deformation preventing part includes a spacer installed to space the primary barrier and the secondary barrier,
Installing the spacers,
Coupling a first flywood member provided with a flywood on an upper portion of the trapezoidal shape;
Coupling a reinforcement foam member provided with a reinforcement foam to a side of the trapezoidal shape; And
Coupling a second plywood member provided with the flywood to the secondary barrier except for the trapezoidal shape. 9. The method of claim 8,
The heat insulation wall part,
An upper layer member coupled to the liquefied gas barrier portion having a primary barrier and a secondary barrier spaced apart from the primary barrier to form a barrier space between the primary barrier and the primary barrier;
A lower layer member coupled to the hull; And
A heat insulation layer member disposed between the upper layer member and the lower layer member and coupled to the upper layer member and the lower layer member,
The heat insulation wall portion is a manufacturing method of the cargo hold is installed on the hull is integrally coupled to the upper layer member, the lower layer member and the heat insulation layer member. delete

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