KR101110846B1 - Insulation structure of liquefied natural gas tank for ship - Google Patents

Abstract

An insulation structure of a marine LNG storage tank is disclosed. A first secondary barrier portion including a plurality of second thermal insulation members disposed adjacent to each other inside the hull, a glass fiber covering the second thermal insulation member and impregnated with a light-transmissive fluororesin or a fluororesin; An insulator unit having a first heat insulating member provided on one side of the first secondary barrier unit; A flat joint inserted into the gap to seal a gap formed between the second insulating members adjacent to each other; A second secondary barrier portion covering a connection area of the first secondary barrier portion adjacent to each other and including a transparent fluorine resin or glass fiber impregnated with the fluorine resin; And a heat insulating structure of the liquefied natural gas storage tank for ship including a welding portion provided at a boundary area between the first secondary barrier portion and the second secondary barrier portion, the secondary barrier portion including a light-transmitting material. By providing, the adhesive state of the adhesive member can be easily visually confirmed, reducing the manpower and time required for the adhesive state and quality inspection.
In addition, embodiments of the present invention, the secondary barrier portion for sealing the heat insulating material unit and the flat joint can be firmly installed by the welding portion, can reduce the manpower and time required for quality inspection, the construction can be simplified.

Description

INSULATION STRUCTURE OF LIQUEFIED NATURAL GAS TANK FOR SHIP}

The present invention relates to a heat insulating structure of a liquefied natural gas storage tank for ships.

In general, liquefied natural gas (LNG) refers to a colorless transparent cryogenic liquid whose natural gas containing methane (methane) is cooled to minus 163 ° C and its volume is reduced to one hundredth.

As such liquefied natural gas emerges as an energy resource, the liquefied natural gas is transported in large quantities from the production base to the demand site in order to use the gas as energy.

However, the LNG carrier is provided with a storage tank as a cargo tank for storing and storing liquefied natural gas liquefied in a cryogenic state, and the storage tank has a gap between the insulation unit and the insulation unit. Only by effectively sealing, the insulation performance of the insulation structure can be improved and stability can be ensured.

In general, in order to insulate the insulating structure, the insulating structure of the LNG storage tank is a flat joint is inserted into the gap formed between the adjacent insulating unit, and the secondary barrier portion adhesive to seal between the insulating unit and the flat joint. It is bonded using. However, as the adhesive is cured, bubbles are generated, and the bubbles are generated, and there is a concern that the re-installation is not necessary because the adhesion is not smoothly performed. In particular, the secondary barrier portion of the opaque material is difficult to visually determine whether the bubble is generated may have a lot of difficulties in construction.

Embodiments of the present invention to provide a heat insulating structure of a liquefied natural gas storage tank for ships by having a secondary barrier portion made of a light-transmitting material, which can visually easily check the adhesion state of the adhesive member.

In addition, embodiments of the present invention to provide a heat insulating structure of a liquefied natural gas storage tank for ships that can be firmly installed secondary barrier portion sealing the heat insulating material unit and the flat joint.

According to an aspect of the present invention, a plurality of second insulating member is installed adjacent to each other inside the hull, and the second insulating member comprising a glass fiber covering the second insulating member and impregnated with a light-transmitting fluorine resin A heat insulating unit having a secondary barrier portion of 1 and a first heat insulating member provided on one side of the first secondary barrier portion; A flat joint inserted into the gap to seal a gap formed between the second insulating members adjacent to each other; A second secondary barrier portion covering a connection area of the first secondary barrier portion adjacent to each other and including a transparent fluorine resin or glass fiber impregnated with the fluorine resin; And a heat insulating structure of the liquefied natural gas storage tank for ship including a welding portion provided in the boundary region of the first secondary barrier portion and the second secondary barrier portion can be provided.

Further, according to another aspect of the present invention, a plurality of second thermal insulation member installed adjacent to each other inside the hull, the connection region of the second thermal insulation member adjacent to each other and cover the second thermal insulation member and a light-transmissive fluorine resin Or a heat insulation unit comprising a secondary barrier portion comprising a glass fiber impregnated with a fluorine resin, and a first insulating member provided on one side of the secondary barrier portion; A flat joint inserted into the gap to seal a gap formed between the second insulating members adjacent to each other; And a heat insulating structure of the liquefied natural gas storage tank for ship including a welding portion provided in the boundary region between the adjacent second barrier portion may be provided.

In addition, according to another aspect of the present invention, a plurality of second insulating member is installed adjacent to each other inside the hull, and includes a glass fiber covering the second insulating member and impregnated with a light-transmissive fluorine resin or fluorine resin A heat insulating material unit having a first secondary barrier portion and a first heat insulating member provided on one side of the first secondary barrier portion; A flat joint inserted into the gap to seal a gap formed between the second insulating members adjacent to each other; A second secondary barrier portion covering the connection area between the first secondary barrier portion and the flat joint and including a transparent fluorine resin or glass fiber impregnated with the fluororesin; And an insulating member interposed between the first secondary barrier portion and the second secondary barrier portion, the insulation structure of the liquefied natural gas storage tank for ships can be provided.

Herein, the method may further include an adhesive member between the first secondary barrier portion and the second secondary barrier portion, wherein at least one surface of the first and second secondary barrier portions may be etched to increase adhesive strength. have.

Here, the welding part may include a per fluoro alkoxy (PFA).

Here, the secondary barrier portion may include a bent portion extending from the end of the second heat insulating member to cover the flat joint when the secondary barrier portion is contracted.

Here, at least one surface of the first and second secondary barrier parts may be etched to increase adhesion.

According to embodiments of the present invention, by providing a secondary barrier portion made of a light-transmissive material, it is possible to easily check the adhesion state of the adhesive member, thereby reducing the manpower and time required for the adhesion state and quality inspection Can be reduced.

In addition, embodiments of the present invention, the secondary barrier portion for sealing the heat insulating material unit and the flat joint can be firmly installed by the welding portion, can reduce the manpower and time required for quality inspection, the construction can be simplified.

1 is a perspective view showing an insulating structure of a liquefied natural gas storage tank according to a first embodiment of the present invention.
Figure 2 is a cross-sectional view showing an insulating structure of the liquefied natural gas storage tank according to the first embodiment of the present invention.
Figure 3 is a cross-sectional view showing an insulating structure of the liquefied natural gas storage tank according to a second embodiment of the present invention.
Figure 4 is a cross-sectional view showing an insulating structure of the liquefied natural gas storage tank according to a third embodiment of the present invention.
5 is a cross-sectional view showing an insulating structure of a liquefied natural gas storage tank according to a fourth embodiment of the present invention.

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

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

1 is a perspective view showing an insulating structure of the liquefied natural gas storage tank according to the first embodiment of the present invention, Figure 2 is a cross-sectional view showing an insulating structure of the liquefied natural gas storage tank according to the first embodiment of the present invention. to be.

1 and 2, the heat insulation structure 100 may include a heat insulation material unit 110, a flat joint 120, a second secondary barrier portion 130, and an adhesive member 140. . The heat insulating material unit 110 may include a second heat insulating member 111, a first secondary barrier portion 114, and a first heat insulating member 115.

Here, the first heat insulating member 115 may function to primarily heat the liquefied natural gas in a configuration adjacent to the liquefied natural gas (LNG) as compared to the second heat insulating member 111. The second heat insulating member 111 may be installed inside the hull to function to secondary heat the liquefied natural gas. As described above, the first and second terms are used for convenience of description and should not be limited by the terms.

A plurality of heat insulating material units 110 constituting the heat insulating structure 100 is provided inside the hull together with the flat joint 120, the second secondary barrier portion 130 and the adhesive member 140, the liquefied natural gas Can be safely stored and stored.

The second heat insulating member 111 may include a lower plywood 112 and a lower insulation panel 113. Each of the lower plywood 112 and the lower insulation panel 113 may be bonded to each other in turn to be integrally formed. The first insulation member 115 may be integrally formed by bonding the upper insulation panel 116 and the upper plywood 117 by bonding.

A plurality of heat insulation units 110 may be installed at intervals adjacent to each other inside the hull. Installation of the heat insulating material unit 110 may be installed so that the second insulating member 111 is coupled to the inner hull. The first secondary barrier part 114 may be installed to cover one surface of the second heat insulating member 111. The first secondary barrier part 114 may include transparent or translucent light-transmissive fluorocarbon resin or glass fiber impregnated with fluorocarbon resin. Here, the glass fiber impregnated with the fluorine resin is not shown in the drawing, for example, it may be formed in a form surrounding all of the outer side of the glass fiber. That is, the glass fiber may be interposed inside the fluororesin. The same may be true in the following embodiments.

The first heat insulating member 115 may be installed on one surface of the first secondary barrier portion 114. Each of the second thermal insulation member 111, the first secondary barrier portion 114, and the first thermal insulation member 115 may be stacked in a row, and each may be coupled by bonding.

When the lower plywood 112 is attached to the storage tank, the flat joint 120 made of fiberglass material may be inserted into a gap formed between each other so that the lower plywood 112 may be spaced apart from each other with a gap therebetween. do. The flat joint 120 is provided in the gap between the adjacent heat insulating material units 110 to seal the gap, thereby preventing the heat of one heat insulating material unit 110 from conducting to another adjacent heat insulating material unit 110 to prevent heat transfer. Can be.

The second secondary barrier portion 130 may be installed on the first secondary barrier portion 114 to cover the connection area between the heat insulating material unit 110 and the flat joint 120. The second secondary barrier unit 130 may include a transparent or translucent light-transmissive fluorine resin or glass fiber impregnated with the fluorine resin, thereby visually confirming the adhesion state of the adhesive member 140 to be described later. have. Accordingly, it is possible to reduce the manpower and time required for adhesion and quality inspection. For example, the fluororesin may be attached to at least one surface of the glass fiber. The fluororesin may be, for example, poly tetra fluoro ethylene (PTFE), fluorinated ethylene propylene (FEP), per fluoro alkoxy (PFA), ethylene tetra fluoro ethylene (ETFE), or chloro trifluoro ethylene (CTFE).

And the adhesive member 140 is provided between the first secondary barrier portion 114 and the second secondary barrier portion 130, the first secondary barrier portion 114 and the second secondary barrier portion 130 may be bonded. Here, at least one surface of the first and second secondary barrier parts 114 and 130 may be etched to increase the adhesive force. For example, an upper surface of the first secondary barrier portion 114 facing the adhesive member 140 may be etched and a lower surface of the second secondary barrier portion 130 facing the adhesive member 140. This may be etched. Alternatively, both surfaces of the first and second secondary barrier parts 114 and 130 may be etched.

In addition, in the boundary region between the first secondary barrier portion 114 and the second secondary barrier portion 130, the second secondary barrier portion 130 and the first secondary barrier portion 114 are formed. The welding unit 150 may be further provided to secure the coupling. As an example, the welder 150 may be provided on a circumferential surface of the second secondary barrier unit 130. The welding unit 150 may include perfluorofluorolkoxy (PFA) to enable welding to the first secondary barrier unit 114 and the second secondary barrier unit 130. The welding part 150 may have a configuration in which the heated PFA is applied to the circumferential surface of the second secondary barrier part 130. In this case, the welding part 150 contains heat, and thus the first and second secondary barrier parts 114 and 130 and the welding part 150 may be fused to each other.

An embodiment of a method for manufacturing a liquefied natural gas storage tank for ships including such an insulating structure will be described below.

First, a plurality of heat insulating material units 110 may be installed adjacent to each other inside the hull. As described above, the heat insulating material unit 110 may include a second heat insulating member 111, a first secondary barrier portion 114, and a first heat insulating member 115. The installation of the heat insulating material unit 110 allows the lower plywood 112 to be attached to the inner side of the hull, so that the flat joint 120 of the glass fiber material may be inserted into the gap formed between each other, and the lower plywood 112 may be inserted into the gap. Allow gaps to be spaced apart from each other.

Next, the flat joint 120 may be inserted into the gap to seal the gap formed between the insulation units 110 adjacent to each other. The flat joint 120 is provided in a gap between adjacent heat insulating material units 110 to seal the gap, thereby preventing heat from one heat insulating material unit 110 from conducting to another adjacent heat insulating material unit 110 to prevent heat transfer. Can be.

Next, a transparent or translucent light-transmissive fluorocarbon resin or fluorine on one surface of the first secondary barrier portion 114 to cover the connection area between the heat insulating material unit 110 and the flat joint 120. The second secondary barrier portion 130 including the glass fiber impregnated with resin can be laminated.

In addition, in the boundary region between the first secondary barrier portion 114 and the second secondary barrier portion 130, the second secondary barrier portion 130 and the first secondary barrier portion 114 are formed. The welding unit 150 may be further provided to secure the coupling. For example, the welding unit 150 may be provided on the circumferential surface of the second secondary barrier unit 130 and welded thereto. Here, the welding part 150 may include a PFA. The welding unit 150 may firmly couple the second secondary barrier unit 130 and the first secondary barrier unit 114. The welding part 150 may have a configuration in which the heated PFA is applied to the circumferential surface of the second secondary barrier part 130. In this case, the welding part 150 contains heat, and thus the first and second secondary barrier parts 114 and 130 and the welding part 150 may be fused to each other.

3 is a cross-sectional view showing an insulating structure of a liquefied natural gas storage tank according to a second embodiment of the present invention. The same names and functions as those of the first embodiment will be denoted by the same reference numerals, and redundant description thereof will be omitted.

Referring to FIG. 3, the heat insulation structure 200 may include a heat insulation material unit 110, a flat joint 120, a second secondary barrier portion 230, and a weld portion 150.

The insulation unit 110 and the flat joint 120 may be provided inside the hull.

The second secondary barrier portion 230 may be installed in the first secondary barrier portion 114 to cover the connection area between the heat insulating material unit 110 and the flat joint 120. The second secondary barrier portion 230 may include a transparent or translucent light-transmissive fluorocarbon resin or glass fiber impregnated with the fluorocarbon resin, thereby facilitating welding with the weld 150 described later.

And a second secondary barrier portion in the boundary region of the first secondary barrier portion 114 and the second secondary barrier portion 230 without using the adhesive member 140 (see FIG. 1) of the first embodiment. The welding unit 150 may be provided to secure the coupling between the 230 and the first secondary barrier unit 114. For example, the welder 150 may be provided on a circumferential surface of the second secondary barrier portion 230. For example, the welding part 150 may be formed on the circumferential surface of the second secondary barrier portion 230 so as to secure the coupling between the second secondary barrier portion 230 and the first secondary barrier portion 114. Can be prepared. The welder 150 may include a PFA to enable welding to the second secondary barrier portion 230.

The welding unit 150 may eliminate the need to separately use the adhesive member 140 by firmly coupling the second secondary barrier unit 230 and the first secondary barrier unit 114. Although the adhesive member used in the general thermal insulation structure was required to be reconstructed as bubbles were generated while hardening, in the present embodiment, the welding portion 150 was used to form the second secondary barrier portion 230 and the thermal insulation unit 110. Since the bonding can be achieved, there is no need to inspect the adhesive state separately, the construction can be simplified.

An embodiment of a method for manufacturing a liquefied natural gas storage tank for ships including such an insulating structure will be described below. And redundant description of the process of forming a configuration having the same function as the above-described embodiment will be omitted.

First, a plurality of heat insulating material units 110 may be installed adjacent to each other inside the hull. As described above, the heat insulating material unit 110 may include a second heat insulating member 111, a first secondary barrier portion 114, and a first heat insulating member 115. After installing the heat insulating material unit 110, the flat joint 120 may be inserted into the gap to seal the gap formed between the heat insulating material unit 110 adjacent to each other.

Next, a transparent or translucent light-transmitting fluorine resin or glass fiber impregnated with a fluorine resin on one surface of the heat insulating material unit 110 to cover the connection area between the heat insulating material unit 110 and the flat joint 120 Secondary barrier portion 230 of two may be stacked. This may be performed by installing a second secondary barrier portion 230 on the first secondary barrier portion 114 to cover the connection area between the heat insulating material unit 110 and the flat joint 120.

Next, the welding unit 150 may be provided on the circumferential surface of the second secondary barrier unit 230 and welded thereto. Here, the welding part 150 may include a PFA.

In this embodiment, there is no use of the adhesive member 140 (refer to FIG. 1) of the first embodiment described above, and thus the lamination process of the adhesive member is omitted. Although the adhesive member used in the general thermal insulation structure was required to be reconstructed as bubbles were generated while hardening, in the present embodiment, the second secondary barrier portion 230 and the first secondary barrier were welded by using the welder 150. Since the combination of the parts 114 can be achieved, the construction can be simplified.

4 is a cross-sectional view showing an insulating structure of the liquefied natural gas storage tank according to the third embodiment of the present invention. The same names and functions as those of the first and second embodiments are given the same reference numerals, and redundant descriptions thereof will be omitted.

Referring to FIG. 4, the heat insulating structure 300 may include a heat insulating material unit 310, a flat joint 120, and a weld 350. The heat insulating material unit 310 may include a second heat insulating member 111, a secondary barrier portion 314, and a first heat insulating member 115.

A plurality of heat insulating material unit 310 and the flat joint 120 may be formed inside the hull.

The second insulating member 111 may be integrally formed by bonding the lower plywood 112 and the lower insulation panel 113 by bonding, and the first insulating member 115 may include the upper insulation panel 116 and the upper ply. The wood 117 may be integrally formed by bonding.

The first heat insulating member 115 may be installed on one surface of the secondary barrier portion 314. Each of the second thermal insulation member 111, the secondary barrier portion 314, and the first thermal insulation member 115 may be stacked in a row, and each may be coupled by bonding. That is, a secondary barrier portion 314 may be provided between the second heat insulating member 111 and the first heat insulating member 115. Accordingly, the lower insulation panel 113, the secondary barrier portion 314, and the upper insulation panel 116 may be stacked and combined in this order.

Here, the plurality of second heat insulating members 111 may be installed at intervals adjacent to each other inside the hull. The secondary barrier part 314 may be installed to cover the connection area of the second insulating member 111 adjacent to each other and one surface of the second insulating member 111.

Although not shown in the drawings, the plurality of heat insulating material units 310 may be arranged in a horizontal line, and the secondary barrier part 314 may cover the connection regions of the second heat insulating members 111 adjacent to each other. It may protrude to both sides of the lower insulation panel 113.

The secondary barrier portion 314 may include a transparent or translucent light-transmissive fluorocarbon resin or glass fiber impregnated with the fluorocarbon resin.

In the present embodiment, the secondary barrier portion 130 of the first and second embodiments is not provided separately, and the secondary barrier portion 314 is adjacent to the upper front surface of the lower insulation panel 113. Each end of the secondary barrier portion 314 may be provided on the connection area. In the present exemplary embodiment, since the secondary barrier portion 314 functions as the second secondary barrier portion 130, it is not necessary to use the second secondary barrier portion 130, thereby reducing material costs. .

The secondary barrier portion 314 is bonded to the lower insulation panel 113 and the upper insulation panel 116 to bond the second insulation member 111 and the first insulation member 115 to form an insulation unit 310. ) Can be achieved. The secondary barrier portion 314 may include a transparent or translucent light-transmissive fluorocarbon resin or glass fiber impregnated with the fluorocarbon resin, thereby facilitating welding with the weld 350 described later.

In addition, without using the adhesive member 140 (see FIG. 1) of the first embodiment, a weld 350 may be provided at a boundary area between adjacent secondary barrier portions 314. As an example, the weld part 350 may be provided on the circumferential surface of the secondary barrier part 314. Here, the weld 350 may strengthen the coupling between the adjacent secondary barriers 314. The welding unit 350 may include a PFA to enable welding to the secondary barrier unit 314. In this way, the welding unit 350 may harden the coupling between the adjacent secondary barrier portion 314 to eliminate the need to use the adhesive member 140 separately. The adhesive member used in the general thermal insulation structure was required to be reconstructed as bubbles were generated while hardening, but in this embodiment, the welding unit 350 may be used to form a coupling between adjacent secondary barrier parts 314. Can be simplified.

An embodiment of a method for manufacturing a liquefied natural gas storage tank for ships including such an insulating structure will be described below. In addition, redundant description of the process of forming a configuration having the same function as the above-described embodiments will be omitted.

First, a plurality of heat insulating material units 310 may be installed adjacent to each other inside the hull. As described above, the heat insulating material unit 310 may include a second heat insulating member 111, a secondary barrier portion 314, and a first heat insulating member 115. Installation of the insulation unit 310 may allow the lower plywood 112 to be attached to the inside of the hull.

In addition, the flat joint 120 may be inserted into a gap formed between the insulation unit 310 adjacent to each other. Since the secondary barrier part 314 is made of fluorine resin, it may have ductility. Before inserting the flat joint 120, the secondary barrier portion 314 may be spread out of the gap to allow the flat joint 120 to be inserted therein. The flat joint 120 is provided in the gap between the adjacent heat insulating material units 310 to seal the gap, thereby preventing heat from one heat insulating material unit 310 from conducting to another adjacent heat insulating material unit 310 to prevent heat transfer. Can be.

Next, the welding unit 350 may be provided on the circumferential surface of the secondary barrier unit 314 to weld it. For example, contact regions facing between adjacent secondary barrier portions 314 may be welded. Here, the weld 350 may include a PFA.

In this embodiment, there is no use of the adhesive member 140 (refer to FIG. 1) of the first embodiment described above, and thus the lamination process of the adhesive member is omitted. The adhesive member used in the general thermal insulation structure was required to be reconstructed as bubbles were generated while hardening, but in this embodiment, the welding unit 350 may be used to form a coupling between adjacent secondary barrier parts 314. Can be simplified.

In addition, the secondary barrier portion 314 is adjacent to the upper insulation of the lower insulation panel 113 without providing the second secondary barrier portions 130 and 230 of the first and second embodiments separately. Each end of the secondary barrier portion 314 can be provided on the connection area, it is possible to reduce the material cost.

5 is a cross-sectional view showing an insulating structure of a liquefied natural gas storage tank according to a fourth embodiment of the present invention. The same names and functions as those of the first to third embodiments have the same reference numerals, and redundant descriptions thereof will be omitted.

Referring to FIG. 5, the heat insulation structure 400 may include a heat insulation material unit 410, a flat joint 120, and a weld portion 450. The heat insulating material unit 410 may include a second heat insulating member 111, a secondary barrier portion 414, and a first heat insulating member 115.

The second insulating member 111 may be integrally formed by bonding the lower plywood 112 and the lower insulation panel 113 by bonding, and the first insulating member 115 may include the upper insulation panel 116 and the upper ply. The wood 117 may be integrally formed by bonding.

In addition, the secondary barrier portion 414 may be provided between the lower insulation panel 113 and the upper insulation panel 116. In this embodiment, the second secondary barrier portion of the first and second embodiments is provided. Without providing 130 and 230 separately, each end of the adjacent secondary barrier portion 414 may be provided on the connection area while the secondary barrier portion 414 covers the upper front surface of the lower insulation panel 113. Can be. In addition, it includes a bent portion 433 extending from the end of the heat insulating material unit 410 to cover the flat joint 120 even when the secondary barrier portion 414 is contracted by the natural gas of minus 163 ℃. can do.

Although not shown in the drawings, the plurality of insulation units 410 may be arranged in a horizontal line, and the secondary barrier unit 414 may cover the connection regions of the second insulation members 111 adjacent to each other. It may protrude to both sides of the lower insulation panel 113.

The secondary barrier part 414 is bonded to the lower insulation panel 113 and the upper insulation panel 116 to form a second heat insulating member 111 and a first heat insulating member 115 integrally with the heat insulating material unit 410. ) Can be achieved. The secondary barrier portion 414 may include a transparent or translucent light-transmissive fluorocarbon resin or glass fiber impregnated with the fluorocarbon resin, thereby facilitating welding with the welding portion 450 described later.

In addition, without using the adhesive member 140 (see FIG. 1) of the first embodiment, a welding portion 450 is provided on the circumferential surface of the secondary barrier portion 414 so as to firmly engage the adjacent secondary barrier portions 414. Can be. The welding part 450 may include a PFA to enable welding to the secondary barrier part 414. Such a welding portion 450 may harden the coupling between the adjacent secondary barrier portion 414, there is no need to use the adhesive member 140 separately. The adhesive member used in the general thermal insulation structure was required to be reconstructed as bubbles are generated while hardening, but in this embodiment, the welding part 450 may be used to form a coupling between adjacent secondary barrier parts 314. Can be simplified.

An embodiment of a method for manufacturing a liquefied natural gas storage tank for ships including such an insulating structure will be described below. In addition, redundant description of the process of forming a configuration having the same function as the above-described embodiments will be omitted.

First, a plurality of heat insulating material units 410 may be installed adjacent to each other inside the hull. As described above, the heat insulating material unit 410 may include a second heat insulating member 111, a secondary barrier portion 414, and a first heat insulating member 115. Installation of the heat insulating material unit 410 is such that the lower plywood 112 is attached to the inside of the hull, the glass joint is formed in a shape that is inserted into the gap formed between the second heat insulating member 111 of the flat joint 120 Can be. That is, the adjacent second heat insulating member 111 and the flat joint 120 may be installed in a line in the horizontal direction. Here, the secondary barrier portion 414 may cover the connection region between the lower insulation panel 113 and the flat joint 120.

Here, the secondary made of transparent or translucent light-transmissive fluorine resin or glass fiber impregnated fluorine resin on one surface of the heat insulating material unit 410 to cover the connection area between the heat insulating material unit 410 and the flat joint 120 The barrier portion 414 can be stacked. This may be performed by installing the secondary barrier portion 414 between the lower insulation panel 113 and the upper insulation panel 116 so as to cover the connection area between the heat insulating material unit 410 and the flat joint 120. Each end of the secondary barrier portion 414 can be performed in the connection area. In addition, the secondary barrier portion 414 includes a bent portion 433 extending from an end portion of the insulation unit 410 to cover the flat joint 120 when the secondary barrier portion 414 is contracted. can do

The flat joint 120 may be inserted into the gap to seal the gap formed between the insulation units 410 adjacent to each other. The flat joint 120 is provided in a gap between adjacent heat insulating material units 410 to seal the gap, thereby preventing heat from one heat insulating material unit 410 from conducting to another adjacent heat insulating material unit 410 to prevent heat transfer. Can be. Since the secondary barrier part 414 is made of fluorine resin, it may have ductility. Before inserting the flat joint 120, the secondary barrier portion 414 may be spread out of the gap so that the flat joint 120 can be inserted.

Next, the welding unit 450 may be provided on the circumferential surface of the secondary barrier unit 414 to weld it. For example, contact regions facing between adjacent secondary barrier portions 414 may be welded. Here, the welding part 450 may include a PFA.

In this embodiment, there is no use of the adhesive member 140 (refer to FIG. 1) of the first embodiment described above, and thus the lamination process of the adhesive member is omitted. The adhesive member used in the general thermal insulation structure was required to be re-constructed as bubbles are generated while hardening, but in this embodiment, the welding unit 450 may be used to form a coupling between adjacent secondary barrier portions 414. Can be simplified.

In addition, without providing the second secondary barrier portions 130 and 230 of the first embodiment and the second embodiment separately, the secondary barrier portion 414 is adjacent to the upper insulation of the lower insulation panel 113 while covering the upper surface. Each end of the secondary barrier portion 414 can be provided on the connection area, it can reduce the material cost. In addition, unlike the third embodiment, the bent portion 433 may be further provided to stably cover the flat joint 120 even when the secondary barrier portion 414 is contracted.

Although the heat insulating structure of the liquefied natural gas storage tank for ships according to an embodiment of the present invention has been described above, the spirit of the present invention is not limited to the embodiments presented herein, and those skilled in the art to understand the spirit of the present invention Within the scope of the same idea, other embodiments may be easily proposed by adding, changing, deleting or adding components, but this will also fall within the scope of the present invention.

100, 200, 300, 400: insulation structure
110, 310, 410: insulation unit 111: second heat insulating member
114: first secondary barrier portion 115: first heat insulating member
120: flat joint 130, 230: second secondary barrier portion 140: adhesive member 150, 350, 450: weld
433: bend

Claims (7)

A first secondary barrier portion including a plurality of second thermal insulation members disposed adjacent to each other inside the hull, a glass fiber covering the second thermal insulation member and impregnated with a light-transmissive fluororesin or a fluororesin; An insulator unit having a first heat insulating member provided on one side of the first secondary barrier unit;
A flat joint inserted into the gap to seal a gap formed between the second insulating members adjacent to each other;
A second secondary barrier portion covering a connection area of the first secondary barrier portion adjacent to each other and including a transparent fluorine resin or glass fiber impregnated with the fluorine resin; And
Insulating structure of a liquefied natural gas storage tank for a ship comprising a welding portion provided in the boundary region of the first secondary barrier portion and the second secondary barrier portion.
The method of claim 1,
Further comprising an adhesive member between the first secondary barrier portion and the second secondary barrier portion,
At least one surface of the first and second secondary barrier portion is an insulating structure of the liquefied natural gas storage tank for ships, characterized in that the at least one surface is etched.
A plurality of second thermal insulation members disposed adjacent to each other inside the hull, and a connection region of the second thermal insulation members adjacent to each other and the second thermal insulation member, and a glass fiber impregnated with a light-transmissive fluorocarbon resin or fluorine resin; A heat insulating material unit having a secondary barrier portion formed thereon and a first heat insulating member provided on one side of the secondary barrier portion;
A flat joint inserted into the gap to seal a gap formed between the second insulating members adjacent to each other; And
Insulating structure of a liquefied natural gas storage tank for ship comprising a welding portion provided in the boundary region between the adjacent secondary barrier portion.
The method according to claim 1 or 3,
Insulation structure of a liquefied natural gas storage tank for ships, characterized in that the weld comprises a PFA (per fluoro alkoxy).
The method of claim 3,
The secondary barrier portion is a heat insulating structure of a liquefied natural gas storage tank for ships, characterized in that it comprises a bent portion extending from the end of the second insulating member to cover the flat joint when the secondary barrier portion is contracted .
A first secondary barrier portion including a plurality of second thermal insulation members disposed adjacent to each other inside the hull, a glass fiber covering the second thermal insulation member and impregnated with a light-transmissive fluororesin or a fluororesin; An insulator unit having a first heat insulating member provided on one side of the first secondary barrier unit;
A flat joint inserted into the gap to seal a gap formed between the second insulating members adjacent to each other;
A second secondary barrier portion covering the connection area between the first secondary barrier portion and the flat joint and including a transparent fluorine resin or glass fiber impregnated with the fluororesin; And
Insulating structure of a liquefied natural gas storage tank for a ship comprising an adhesive member interposed between the first secondary barrier portion and the second secondary barrier portion.
The method of claim 6,
At least one surface of the first and second secondary barrier portion is an insulating structure of the liquefied natural gas storage tank for ships, characterized in that the at least one surface is etched.

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