KR100782737B1 - Insulation system having the secondary barrier welded and its fabrication procedure for lng cargo containment system - Google Patents

Abstract

An insulation system for an LNG storage container having a welded secondary barrier and a method for constructing the same are provided to improve the structural safety of the secondary barrier by connecting the secondary barrier to a secondary insulation plate. In an insulation system for an LNG storage container, corner portions of a plurality of secondary insulation plates(20) are connected to a hull. A secondary barrier is formed at an upper portion of the secondary insulation plate by integrating a strake formed with a metal plate. After a bonding layer is formed at an upper portion of the secondary barrier, a primary insulation plate(10) is installed so as to cross the secondary insulation plate by a bonding layer. A primary barrier(40) is installed at an upper portion of the primary insulation plate. In the primary insulation plate, an upper veneer board is integrally formed with the upper surface of the insulation material.

Description

Insulation system having the secondary barrier welded and its fabrication procedure for LNG cargo containment system}

1 is a cross-sectional view showing a schematic configuration according to the present invention

2 is an enlarged view of a portion A of FIG. 1;

Figure 3 is a cross-sectional view showing a first modification according to the present invention

Figure 4 is a cross-sectional view showing a second modified example according to the present invention

5 is a cross-sectional view showing a welding state of the second modification according to the present invention;

6 is an enlarged view of a portion B of FIG. 1;

Figure 7 is an illustration showing the configuration of the fastening means according to the invention

8 is an exemplary view showing a first modified state of the fastening means according to the present invention;

9 is an exemplary view showing a second modified state of the fastening means according to the present invention.

10 is an exemplary view showing a third modified state of the fastening means according to the present invention.

11 is an exemplary view showing a fourth modified state of the fastening means according to the present invention.

12 is an exemplary view showing a fifth modified state of the fastening means according to the present invention.

13 is an exemplary view showing a sixth modified state of the fastening means according to the present invention;

14 is an exemplary view showing a seventh modified state of the fastening means according to the present invention;

15 is an exemplary view showing the configuration of a secondary barrier formed of a thin metal plate according to the present invention;

Figure 16 is a flow chart showing the installation process according to the present invention

17 is an exemplary view showing an installation process according to the present invention.

18 is a partial exemplary view showing an installation state according to the present invention;

Figure 19 is an exploded perspective view showing the installation according to the present invention

20 is an exemplary view showing an installation state according to the present invention

21 is an exemplary view showing a heat insulation structure of a conventional LNG cargo ship cargo hold

* Explanation of symbols for main parts of the drawings

(10): primary insulation board (11): upper plywood

(12): Insert metal for welding (13): Insulation

(14): clearance part (20): secondary insulation board

21: upper plywood 22: lower plate

(23): Insulation material (24): Tongue insertion hole

25: tongue 26: insert insulation

(27): clearance part (28): insertion groove

(29): hole (29`): coupling hole

(40): primary barrier (42): corrugation

(50,50a, 50b): Secondary Barrier (54,54a, 54b): Thin Metal Strike

(55,55b): welded part (56,56a, 56b): welded part

(51a, 51b): Insert metal for welding

60: adhesive layer 61: space part

(70): hull (80): hull / heat insulation

(81): Level wedge (82): Mastic

(90): fastening means

90a: fastening means showing the first deformation state

90b: fastening means showing a second deformation state

90c: fastening means showing the third deformation state

90d: fastening means showing a fourth deformation state

90e: Fastening means showing the fifth deformation state

90f: fastening means showing a sixth deformation state

(90g): Fastening means showing the seventh deformation state

(91,91a, 91b, 91c, 91d, 91e, 91f, 91g): Fixed bolt

(92,92a, 92b, 92c, 92e, 92f): support

(93,93a, 93b, 93c, 93d, 93e, 93f, 93g): fixing nut

(94,94a, 94b, 94c, 94e, 94f): hole

(95b): joining table

92d: first support 94d: coupling tool

(95d): Thread (96d): Support Plate

97d: insertion hole 98d: second support stand

(95c, 95f): wing (96c, 96f): first wing

(97c, 97f): Second wing (100): Primary insulation layer

(200): secondary insulation layer

The present invention relates to a thermal insulation system for a LNG storage container having a welded secondary barrier, and a construction method thereof, wherein the secondary insulation plate is firmly fixed to the hull by a fastening means, and the secondary barrier is invar alloy and stainless steel. And integrally installed by welding of a strike made of a thin metal plate such as aluminum alloy, and alternately stacking the primary heat insulating plate and the secondary heat insulating plate to alternate with each other, and adhesively installing the primary heat insulating plate on the secondary barrier by adhesive. The present invention relates to a thermal insulation system for liquefied natural gas storage containers having a welded secondary barrier with improved airtightness and workability, and a construction method thereof.

Today, a low temperature liquefaction method is mainly used to store and transport large quantities of substances such as hydrogen, oxygen, and natural gas, and thus, an insulation container for storing and transporting cryogenic liquefied gas is very important. In the design of the heat insulation container, the heat insulation technology for preventing the boiling of the liquefied gas by the heat transfer from the outside and the leak prevention technology of the liquefied gas are most important.

Currently, commercially available thermal insulation methods include an external insulation method and an internal insulation method, and the internal insulation method can control the temperature of the container enclosure similar to the outside temperature, thus limiting the use of materials such as the application of low-temperature materials. There is no advantage to this. As such an internal insulation method, a membrane-type insulation system of GTT, France, which has a double barrier structure based on the middle barrier structure (US Patent No. 484358) of McDonald Douglas, USA, is known.

FIG. 21 illustrates a heat insulation structure of a conventional LNG carrier cargo hold, wherein the heat insulation system includes a membrane primary barrier 550 formed of an upper primary insulating plate 510 and a lower secondary insulating plate 520 and stainless steel. It is composed of a double barrier structure of the secondary barrier 530 made of a triplex, the thickness thereof is provided with 100mm, 170mm, respectively. In addition, when the insulation board is installed on the inner wall of the insulation container, the insulation system is adhesively sealed with a secondary barrier material 531 called a flexible triplex for the purpose of ensuring airtightness at the junction of the secondary barrier. The upper part is installed by a two-stage operation that works with the connecting plate 540 of the same material as the primary insulation plate, which not only takes a lot of time, but also requires considerable construction precautions to ensure airtightness at the secondary barrier joint. There are many problems such as needing.

The present invention is to solve the above problems, the object of the work is to form a secondary barrier by integrally forming a secondary barrier by welding the metal plate is processed by welding, by integrally bonding the primary insulation plate to the secondary barrier, It is to provide a thermal insulation system for a liquefied natural gas storage container having a welded secondary barrier that can shorten the process and work time, and improve the robustness of the thermal insulation layer and a construction method thereof.

Still another object of the present invention is to provide an insulation system for a liquefied natural gas storage container and a construction method thereof that can easily and firmly support a secondary insulation plate to a hull by fastening means to improve assemblability and overall constructability.

It is still another object of the present invention to improve productivity by shortening the working process and working period by forming a metal secondary barrier mostly by resistance welding.

Another object of the present invention is to form a thermal insulation system integrally by welding and adhesive to improve the workability and assemblability, liquefied natural gas having a welded secondary barrier that can be provided with excellent thermal insulation, airtightness and workability It is to provide an insulation system for storage containers and a construction method thereof.

Still another object of the present invention is to install a welded insert metal on a secondary heat insulating plate to protect the secondary heat insulating plate during welding of a metal sheet, and to protect the secondary heat insulating plate by welding the inserted metal and the strike secondary. The present invention provides a thermal insulation system for a liquefied natural gas storage container having a welded secondary barrier with improved airtightness and a construction method thereof.

It is still another object of the present invention to provide an integrated secondary barrier having excellent airtightness by installing a tongue on a secondary heat insulating plate and welding the tongue and a strike machined from a thin metal plate.

The present invention is connected to the hull 70 by the fastening means 90 to the corners of the plurality of secondary insulation plates 20 that are continuously installed to be connected to the hull 70, the upper portion of the secondary insulation plate 20 After forming the secondary barrier 50 by integrating the strike 54 processed by the thin metal plate by welding, and after forming the adhesive layer 60 on the secondary barrier 50, the secondary using the secondary The primary insulating plate 10 is adhesively installed so as to cross the insulating plate 20, and the primary barrier 40 is installed on the adhesively installed primary insulating plate 10.

That is, the present invention is a plurality of secondary heat insulating plate 20 which is continuously installed to be connected to the hull 70 by the hull / insulation plate connecting portion 80,

A fastening means 90 installed to be positioned between the one side secondary insulation plate and another secondary insulation plate adjacent thereto and fixing the corner of the secondary insulation plate to the hull 70;

A secondary barrier unit 50 which is formed on the upper part of the secondary heat insulating plate and integrally formed by welding of the strike processed into a thin metal plate;

A primary heat insulating plate 10 disposed on the upper side of the secondary barrier and installed to alternate with a secondary heat insulating plate positioned below;

An adhesive layer 60 disposed between the primary insulation plate 10 and the secondary barrier 50 to integrally bond the primary insulation plate 10 and the secondary barrier 50 to each other;

The primary barrier 40 is welded to the upper surface of the primary heat insulating plate 10 to be installed.

The primary barrier 40 installed above the primary insulation board has a corrugation 42 which is convexly raised in the upward direction to facilitate expansion and contraction of the primary barrier 40 in response to a temperature change caused by the load. ) Are formed in large numbers.

The secondary barrier is made of a metal material such as Invar alloy, stainless steel, aluminum alloy, etc., integrally formed to maintain airtightness by welding, and is firmly fixed to the secondary insulation plate.

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

1 is a cross-sectional view showing a schematic configuration according to the present invention, FIG. 2 is an enlarged view of a portion A of FIG. 1, FIG. 3 is a cross-sectional view showing a first modified example according to the present invention, FIG. 5 is a cross-sectional view illustrating a second modified example according to the present invention, FIG. 5 is a cross-sectional view illustrating a welding state of the second modified example according to the present invention, and FIG.

In the present invention, a plurality of secondary insulation plates 20 are installed continuously to form a secondary insulation layer 200, and a plurality of primary insulation plates 10 are continuously installed on the upper portion of the primary insulation layer 100. ) And a secondary barrier 50 is disposed between the primary insulation layer 100 and the secondary insulation layer 200, and the primary barrier 40 is installed on the primary insulation layer 100. In the insulation system for the LNG storage container,

The secondary insulation plate is firmly fixed to the hull by the fastening means,

The secondary barrier is integrally connected to the secondary heat insulating plate by welding of the strike machined with the metal thin plate,

The primary heat insulating plate is laminated so as to alternate with the secondary heat insulating plate located at the bottom by the adhesive layer formed on the secondary barrier,

The primary barrier is formed on the upper portion of the primary insulation plate.

The secondary barrier 50 is installed to be located above the secondary insulation plate, and as shown in FIGS. 1 and 15, the tongue 25 installed on one side of the secondary insulation plate and another secondary insulation plate adjacent thereto. A strike 54 is inserted between the tongues 25, and both sides of the metal strike 54 are welded and integrated into the tongues 25 in contact with each other.

That is, the secondary barrier 50 positioned above the secondary insulation plate 20 is formed by welding the tongue 25 and the strike 54 inserted into the tongue insertion hole 24 of the secondary insulation plate.

The tongue 25 supports the secondary barrier formed by welding to the secondary heat insulating plate, and is installed in one direction of the secondary heat insulating plate. That is, the tongue 25 is installed so that the lower portion is inserted through the upper plywood of the secondary insulation plate, the upper portion protrudes outside the upper plywood of the secondary insulation plate.

As shown in FIGS. 1 and 15, the strike 54 processed by the thin metal plate includes welds 55 at both ends, and both ends of the strike 54 are upper portions of the strike 54. It is bent so as to protrude in a direction and is formed in one piece. That is, the strike 54 is bent so that both ends have the same height in the upper direction, and a portion of the bent portion so as to protrude in this way corresponds to the welding portion 56 is welded substantially.

The welding portion 55 is a portion that comes into contact with the tongue 25 installed to protrude in the center of the secondary insulation plate 20 when the strike 54 is installed, and welding with the tongue 25 as shown in FIG. 15. Are integrated by.

That is, the welding portions 55 located on both sides of the strike 54 are welded on both sides of the tongue 25 provided on one side secondary heat insulating plate and the tongue 25 provided on another secondary heat insulating plate adjacent thereto. 55 is installed to be in contact, and the welding portion 55 and the tongue 25 to be contacted are integrated to maintain airtightness by resistance welding or the like.

The secondary heat insulating plate 20 is made of a polyurethane insulating material 23, is installed to be located on the hull / heat insulating plate connecting portion, the upper and lower surfaces of the upper plywood 21 and wood made of synthetic resin Alternatively, the lower plate member 22 composed of a synthetic resin or a metal thin plate is integrally formed.

In addition, the secondary heat insulating plate 20 is formed such that the lower plate material 22 protrudes from the heat insulating material 23 of the polyurethane material, or the lower plate material 22 and the heat insulating material 23 have the same length, but the lower plate material ( An insertion groove 28 having a predetermined depth may be formed at a lower edge portion of the heat insulating material 23 in contact with the upper surface of the 22.

That is, the insertion groove 28 is formed in the inward direction of the heat insulating material, the upper surface of the corner portion of the lower plate member 22 is exposed by the insertion groove 28.

In addition, as shown in FIGS. 1 and 2, the upper portion of the upper plywood 21 of the secondary insulation board “T” is installed with the tongue 25 of the secondary barrier inserted in one direction of the secondary insulation board 20. Alternatively, the tongue insertion opening 24 of the "L" shape is formed. That is, the tongue 25 of the secondary barrier is inserted into the tongue insertion opening 24 formed in the upper middle of the upper insulation board of the secondary insulation plate to support the primary insulation plate to be subsequently coupled with the secondary barrier.

The tongue insertion opening 24 is formed by mechanically processing the upper plywood 21 and the portion where the secondary heat insulating plate 20 is in contact with the upper plywood 21, as shown in FIG. By forming a groove having a depth of 1 to 5 mm enough to insert the tongue 25 in the upper central portion of the 20, and by adhesively bonding the upper plywood 21 divided into two or more portions thereon The tongue insertion opening 24 is comprised in one direction of the vehicle heat insulation board 20.

The tongue insertion hole 24 configured by the above method is easier to inspect for manufacturing and defects than a method of providing a connection groove in a reinforcement plate made of a conventional wood material, and the secondary insulation layer 200 including the tongue insertion hole 24 is provided. ) Provides many advantages.

As described above, the secondary barrier of the present invention has a tongue inserted into a tongue insertion hole formed in one direction at the center of the upper surface of the secondary insulation plate 20, and a stripe is formed on a portion of the tongue 25 protruding to the upper portion of the secondary insulation plate. Welded portions 55 formed on both sides of the rake 54 are welded to form a single piece.

The secondary barrier 50 is welded on both sides of the strike 54 is welded to the tongue 25, the bent portion of the welded tongue 25 is the upper plywood 21 of the secondary insulation plate 20 The lower portion of the strike 54 and the streak constituting the secondary barrier in order to increase the strength of the secondary barrier 50 and the secondary insulating plate 20, but is supported and fixed by the inner tongue insertion hole 24. The upper plywood 21 of the secondary heat insulating plate 20 to which the rake 54 is in contact may be bonded and fixed by an adhesive.

In addition, the tongue 25 and the strike 54 forming the secondary barrier 50 have a length capable of covering a plurality of secondary insulation plates so as to continuously seal the secondary insulation plates installed continuously.

In addition, as shown in FIGS. 3 to 5, the welding type secondary barrier inserts and inserts a welding insert metal into the upper plywood of the secondary insulation board, and applies two or more adjacent strikes on the welding insert metal. Alternatively, the welding insert metal installed on the upper plywood of the secondary insulating plate and the strike contact therewith may be formed, and the strike may be formed by welding another neighboring strike and the side end.

That is, Figure 3 shows a cross-sectional view showing a first modified example of the secondary barrier according to the present invention, the secondary barrier 50b is a welding insert metal 51b to the upper plywood of the secondary insulation plate And welding one side of the welding insert metal 51b and the strike 54b in contact therewith, and contacting one side of the strike 54b and the edge of another strike 54b adjacent thereto by contact welding. It is supposed to be integrated. At this time, welds 55b for welding are formed on both sides of the strike 54b.

That is, according to the present invention, one or more welding inserting metals 51b are respectively installed on the upper plywood of the secondary heat insulating plate, and the welding inserting metals and a part of the strike 54b in contact therewith are welded together. The welded portions of the strike are welded to each other to form an integrated secondary barrier 50b.

As shown in FIG. 3, the welding insert metal 51b is installed at each corner of both sides of the upper plywood of the secondary insulation board, or at least one is installed at an arbitrary position, and the contact of the strike 54b. A portion is welded at the weld site 56b.

4 is a cross-sectional view illustrating a second modified example of the secondary barrier according to the present invention, wherein the secondary barrier 50a is provided with a welding insert metal 51a on an upper portion of the secondary insulation plate. The two or more strikes 54a adjacent to each other on the welding insert metal 51a are welded together with the welding insert metal 51a to be integrated. That is, the secondary barrier 50a is configured such that two or more strikes adjacent to the welding insertion metal are integrated by welding on the welding insertion metal 51a.

At this time, the strike 54a is integrated by fillet welding, butt welding, overlap welding, or the like, as shown in FIG.

As described above, the secondary barriers 50a, 50b, and 50 of the present invention are provided with a welding insert metal 51a, 51b or a tongue 25 inserted into a secondary heat insulating plate, and the welding insert metals 51a, 51b are installed. Or the tongues (25a), which are machined with thin metal plates (54a, 54b, 54), are welded to form an integrated body. The welded secondary barrier of the present invention is not limited to the above modification. A weldable secondary barrier integrated by welding.

In addition, the adhesive is applied to the upper portion of the secondary barrier (50, 50a, 50b), that is, the upper portion of the strike (54a, 54b, 54) of the present invention made as described above and the modification according to the present invention, the adhesive layer ( 60 is formed, and the primary heat insulating plate 10 is bonded to the formed adhesive layer 60 to be integrated.

The lower plate material 22 is made of wood or synthetic resin or metal foil, is installed to be located on the hull / insulation plate connecting portion 80, the edge portion is in direct contact with the fastening means 90 by pressing the fastening means It is fixedly supported. That is, the entire secondary heat insulating plate 20 is fixed by the fixing support of the lower plate member 22.

The hull / heat insulation plate connection portion 80 is a level wedge (81) having a supporting force when installing the secondary insulation plate by the fastening means, and a mastic (82), which is an adhesive for fixing the secondary insulation plate to the hull. consist of.

The fastening means 90 is to firmly support the secondary heat insulating plate to the hull, by fixing the secondary heat insulating plate 20 to the hull 70 by fastening the fixing bolt and the fixing nut.

That is, the fastening means is provided with a fixing bolt fixed to the hull, a support through which the fixing bolt is penetrated and pressed into the lower plate of the secondary insulation plate, coupled to the end of the fixing bolt through the hole of the support In the case of the secondary insulating plate formed of a fixing nut for fixing the support, the lower plate is formed to protrude more than the insulating material of the polyurethane material, the fastening means of the present invention by the fixing bolt and the fixing nut without the support bottom of the secondary insulating plate The plate may also be supported directly.

In addition, in order to smoothly fasten the bolt and the nut, a washer having an elasticity may be inserted into the lower portion of the fixing nut 93.

Referring to the fastening means according to the present invention in detail with reference to the accompanying drawings as follows. In addition, the fastening means according to the present invention can be configured by various modifications as shown in Figures 6 to 14 according to the configuration of the secondary insulating plate and the configuration of the support.

6 to 11 are fastening means for the secondary heat insulating plate formed by protruding the lower plate of the secondary heat insulating plate than the polyurethane heat insulating material, Figures 12 and 13 are formed with an insertion groove in the corner of the lower portion of the heat insulating material in contact with the lower plate Figure 14 shows the fastening means for fixing the secondary insulating plate by the fixing bolt and the fixing nut without the installation of the support for the secondary insulating plate formed by protruding the lower plate edge of the secondary insulating plate protruding than the polyurethane insulating material. It is.

Figure 6 is an enlarged view of the portion B of Figure 1, Figure 7 shows an exemplary view showing the configuration of the fastening means, the fastening means 90 according to the present invention is one side secondary heat insulating plate and another secondary neighboring thereto Fixing bolt 91 is fixed to the hull so as to be located between the insulating plate, the hole 94 is inserted into the fixing bolt is formed at equal intervals and the lower both sides of the upper surface of the lower plate edge of the secondary insulating plate 20 The support 92 is in contact with, and the fixing nut 93 is fastened to the end of the fixing bolt 91 protruding through the hole 94 of the support.

The fastening means 90 configured as described above is supported by the lower both sides of the support 92 in contact with the upper surface of the lower plate member 22 protruding from the secondary heat insulating plate, so that the fixing nut 93 and the fixing bolt 91 are fastened. By simultaneously pressing-supporting the lower plate material 22 of the secondary heat insulation board in which 92 is located on both sides, the secondary heat insulation board 20 is fixed.

That is, the fastening means 90 of the present invention shown in FIGS. 6 and 7 is the edge of the secondary insulating plate 20 located at both sides by one support 92 into which a plurality of fixing bolts 91 are inserted. Support the site at the same time.

Figure 8 shows an exemplary view showing a first deformation state of the fastening means according to the present invention, the fastening means (90a) showing the first deformation state between one side of the secondary insulating plate and another secondary insulating plate neighboring thereto Fixing bolt (91a) is fixed to the hull so as to be located in, and a support hole (92a) having one hole (94a) into which the fixing bolt is inserted, the lower both sides contact the upper surface edge of the lower plate of the secondary insulation plate And a fixing nut 93a fastened to the end of the fixing bolt 91a protruding through the hole 94a of the support.

That is, the fastening means 90a showing the first deformation state shown in FIG. 8 is a modification of the configuration of the support shown in the fastening means of FIGS. 6 and 7, and the fastening means 90 of FIGS. 6 and 7. While the support 92 shown in FIG. 8 has a long plate shape in which a plurality of holes 94 into which fixing bolts are inserted are formed at equal intervals, the support 92a of the fastening means 90a shown in FIG. Only one hole 94a into which the fixing bolt is inserted has a short plate shape.

As such, the support of the fastening means shown in FIGS. 6 and 7 may support the secondary insulation plates positioned at both sides by one support, but the support in the first modified state shown in FIG. By supporting the secondary insulation plates located on both sides by the above, the fastening means as described above has its advantages in the assembly construction and a firm fixed state and the like.

In addition, Figure 9 shows an exemplary view showing a second modified state of the fastening means according to the present invention, the fastening means (90b) showing the second modified state is one side of the secondary insulating plate and another secondary adjacent thereto A fixing bolt 91b fixed to the hull so as to be positioned between the heat insulating plates, and one hole 94b into which the fixing bolts are inserted are formed, and a coupling table 95b protruding downward on both sides is provided at the bottom of the secondary heat insulating plate. It consists of a support 92b inserted into the coupling hole 29` formed at the edge of the plate and a fixing nut 93b fastened to the end of the fixing bolt 91b protruding through the hole 94b of the support. have.

That is, the support 92b of the fastening means 90b showing the second deformed state has a coupling stand 95b protruding downward at both ends thereof, and a coupling hole in the protruding lower plate 22 of the secondary insulation plate. (96b) is formed, the support is installed so that the coupling is inserted into the coupling hole formed in the lower plate of the secondary heat insulating plate, the fixing nut is fastened to the end of the fixing bolt through the hole of the support, the secondary heat insulating plate To be supported.

Fastening means (90b) having such a configuration is that the coupling table of the support is coupled to the coupling hole formed in the lower plate of the secondary heat insulating plate, it is possible to more firmly fix the secondary heat insulating plate.

In addition, Figure 10 shows an exemplary view showing a third modified state of the fastening means according to the present invention, the fastening means (90c) is the hull to be located between one side secondary insulating plate and another secondary insulating plate adjacent thereto Fixing bolt 91c fixedly installed in the hole, and the hole 94c into which the fixing bolt is inserted are formed at equal intervals, and the wing portions 95c protruding upward in both directions contact the upper surface of the lower plate of the secondary insulating plate. It consists of a support 92c and a fixing nut 93c fastened to the end of the fixing bolt protruding through the hole of the support.

That is, the support of the fastening means showing the third deformed state has a wing portion (95c) protruding in the upper direction on both side ends, the wing portion (95c) and the first wing (96c) protruding in the upper direction And a second wing 97c protruding outwardly in a direction orthogonal to the first wing on the upper end of the first wing.

Fastening means (90c) showing a third modified state of the present invention configured as described above, when fastening the fixing bolt 91c and the fixing nut (93c), both sides of the first wing (96c) of the support (92c) is a secondary insulating plate The lower plate side of the contact surface, the lower surface of the second wing (97c) is in contact with the upper surface of the lower plate edge portion of the secondary heat insulating plate to support the secondary heat insulating plate.

In addition, Figure 11 shows an exemplary view showing a fourth modified state of the fastening means according to the present invention, the fastening means (90d) is a hull so as to be located between one side secondary insulating plate and another secondary insulating plate adjacent thereto A fixing bolt 91d fixedly installed at the fixing bolt and a coupling hole 94d screwed to the fixing bolt 91d, and having a screw thread 95d at an outer surface thereof, and having a lower portion of the lower plate material in contact with the lower plate member. A first support 92d having a plate 96d and an insertion hole 97d into which the first support 92d having the thread 95d is inserted are installed so that the lower surface contacts the upper surface of the lower plate member. And a fixing nut (93d) fastened to the thread (95d) of the first support projecting through the insertion opening (97d) of the second support.

That is, the fastening means 90d of the fourth deformed state first fastens the first support 92d to the fixing bolt 91d, and the secondary insulation plate is continuously positioned, and then to the upper surface of the lower plate of the secondary insulation plate. The second support 98d is installed on the first support 92d so as to be in contact, and the fixing nut 93d is fastened to the thread 95d of the first support protruding through the insertion hole 97d of the second support. The secondary heat insulating plates are firmly fixed by the first and second support stands 92d and 98d.

In addition, Figure 12 shows an exemplary view showing a fifth modified state of the fastening means according to the present invention, the fastening means (90e) is located between the one side secondary heat insulating plate and another secondary heat insulating plate adjacent to the hull A fixing bolt 91e fixedly installed at one side and one hole 94e into which the fixing bolt is inserted, and both ends of the fixing bolt 91e are inserted into the insertion groove 28 formed in the heat insulating material of the secondary insulation plate. It consists of a support (92e) in contact with the upper surface of the lower edge portion of the secondary insulating plate, and a fixing nut (93e) fastened to the end of the fixing bolt 91e protruding through the hole (94e) of the support. .

That is, the support of the fastening means showing the fifth deformation state is for fixing the secondary insulation plate having the insertion groove 28, the fixing bolt 91e is installed on the hull, the fixing bolt is a hole of the support The support is installed so as to penetrate, but both ends of the support are inserted into the insertion groove formed in the heat insulating material of the secondary heat insulating plate so that the lower sides of the support are installed in contact with the upper surface of the lower plate material of the secondary heat insulating plate, and then through The fixing nut is fastened to one fixing bolt to support the secondary insulation plate.

The fastening means (90e) having such a configuration is such that the lower plate of the secondary heat insulating plate to be installed does not protrude from the heat insulating material and has the same length as the heat insulating material, so that the second heat insulating plate is firmly fixed while having excellent heat insulating performance. can do.

In addition, Figure 13 shows an exemplary view showing a sixth modified state of the fastening means according to the present invention, the fastening means (90f) is located between the one side secondary heat insulating plate and another secondary heat insulating plate adjacent to the hull A fixing bolt 91f fixedly installed at one side thereof and one hole 94f into which the fixing bolt is inserted, and the wing portions 95f protruding upward in both directions are in contact with the upper surface of the lower plate of the secondary insulation plate. It consists of a support 92f and a fixing nut 93f fastened to the end of the fixing bolt 91f protruding through the hole 94f of the support.

That is, the support of the fastening means showing the sixth deformation state has a wing portion (95f) protruding in the upper direction at both side ends, the wing portion (95f) and the first wing (96f) protruding in the upper direction It is comprised so that the 2nd blade | wing 97f which protrudes in the direction orthogonal to a 1st blade | wing and the outward direction may be provided in the upper end of the said 1st blade | wing 96f.

The fastening means showing the sixth modified state of the present invention configured as described above, when the fixing bolt and the fixing nut are fastened, both sides of the first wing of the support contact the side of the lower plate of the secondary insulation plate, and the second wing bottom surface is 2 It is in contact with the upper surface of the lower plate edge portion of the vehicle insulation plate to support the secondary insulation plate.

 The support shown in the fastening means of the sixth deformed state configured as described above has only one hole into which the fixing bolt is inserted, but the support of the third deformed fastening means shown in FIG. Holes are formed at equal intervals.

That is, the support of the fastening means showing the sixth deformation state shown in FIG. 13 is configured to support secondary insulation plates positioned on both sides by a plurality of supports, but the support of the third deformation state shown in FIG. The support can support the secondary insulation plates located on both sides at the same time, and the wing portion of the support is inserted into the insertion groove formed in the insulation of the secondary insulation plate, so that the secondary insulation plate is firmly fixed while providing excellent insulation performance. can do.

Figure 14 shows an exemplary view showing a seventh modified state of the fastening means according to the present invention, the fastening means (90g) of the seventh modified state shown in Figure 14 is a fixed bolt and a fixing nut only 2 without the installation of the support 2 Fix the car insulation board. That is, the fixing bolt (91g) is installed in the hull 70, and the hole (29) through which the fixing bolt (91g) is inserted into the corner of the lower plate formed so as to protrude than the polyurethane heat insulating material is formed, the hole (29) ) Can be directly fixed to the secondary insulating plate by fastening the fixing nut (93g) to the end of the fixing bolt (91g) protruding upward.

The fastening means installed in this way is to directly fix the lower plate member protruding than the secondary heat insulating plate heat insulating material, it can be provided with excellent assembly properties and solid support.

As described above, in the present invention, the secondary insulation plate is continuously and firmly fixed to the hull by the fastening means configured as shown in FIGS. 6 to 14.

In addition, in the secondary insulation layer formed by the secondary insulation plates continuously installed as described above, a gap portion 27 in which a fastening means is installed between the secondary insulation plate on one side and another secondary insulation plate adjacent thereto is generated. The insertion portion 26 is inserted into the portion 27. At this time, the insert insulation 26 is the same insert insulation as the insulation of the primary and secondary insulation plates 10 and 20, or a known high performance insulation.

The adhesive layer 60 is formed by being applied to the secondary barrier 50 integrally formed by welding. As shown in FIGS. 1 and 2, both ends of the adhesive layer 60 are welded to the strike. In order not to reach 55, that is, the space 61 is formed between the welded portion 55 and the end of the adhesive layer 60, and is formed on the secondary barrier while maintaining a predetermined interval. At this time, it is preferable that the adhesive layer 60 uses a polyurethane adhesive.

In addition, the adhesive layer 60 is preferably such that the width formed by the coating has about 60% or more, preferably about 70% or more and less than 99% of the width of both ends of the strike. That is, when the width of the adhesive layer 60 is less than 60%, since the fixing force of the primary heat insulating plate may be lowered, it is preferable to apply the coating to have a width greater than that to bond the primary heat insulating plate to the secondary barrier. Do.

The primary heat insulating plate 10 is installed by an adhesive layer formed on the secondary barrier, and the upper plywood 11 made of wood or synthetic resin is integrally formed on the upper surface of the heat insulating material 13 made of polyurethane.

In addition, in the upper part of the upper plywood 11, when the primary barrier 40 is welded to the primary heat insulating plate 10, the welding insert metal to facilitate the protection and welding of the primary heat insulating plate 10 ( 12) is installed.

In addition, the polyurethane material heat insulating material 13 and the upper plywood 11 of the primary heat insulating plate 10 is formed by mutual bonding, the polyurethane material heat insulating material 23 of the secondary heat insulating plate 20, the upper plywood and The lower plate members 21 and 22 are also formed by mutual bonding.

In addition, a gap 14 is formed between the primary insulation plate and another primary insulation plate adjacent thereto, where the welding portion of the tongue and the strike is located, and the clearance portion 14 is preferably about 3 to 5 mm. Has a width of about 4 mm.

That is, since the primary insulation board is integrally bonded to the secondary barrier by an adhesive layer, the primary insulation board is densely arranged so that the gap between the primary insulation board on one side and another primary insulation board adjacent thereto is narrow to about 3 to 5 mm. It can be installed, thereby improving the thermal insulation performance.

The primary barrier 40 is installed so as to be positioned above the primary heat insulating plate 10, and the primary barrier is formed by continuously installing a stainless steel metal panel having a corrugation 42 on the primary heat insulating plate 10. 40 will be formed. In this case, the stainless steel metal panel having the corrugation is formed by forming a primary barrier 40 by overlapping and welding two or more stainless steel metal panels adjacent to each other in the welding insert metal 12 of the primary insulation plate.

In addition, the present invention is formed so that the corrugation 42 of the primary barrier is located at both ends and the central portion of the primary heat insulating plate so that it is located wider than the gap between the corrugation of the existing primary barrier. It is.

Figure 16 is a flow chart showing the installation process according to the invention, Figure 17 is an exemplary view showing the installation process according to the invention, Figure 18 is a partial illustrative view showing an installation state according to the present invention, Figure 19 is the present invention 20 is an exploded perspective view showing an installation according to the present invention, and FIG. 20 is an exemplary view showing an installation state according to the present invention.

A first installation step of installing the fixing bolts of the hull / heat insulating plate connecting portion 80 and the fastening means on the hull;

A secondary insulation plate installation step of continuously installing a secondary insulation plate 20 on the hull / heat insulation plate connection unit;

A fastening step of simultaneously fixing the continuously installed one side secondary heat insulating plate 20 and another secondary heat insulating plate 20 adjacent thereto by a fastening means;

A secondary barrier forming step of forming a secondary barrier by integrating a plurality of strikes processed by a thin metal plate on the upper part of the fixed secondary insulating plate 20 by welding;

Forming an adhesive layer (60) by applying an adhesive to the formed secondary barrier (50);

A primary heat insulation plate installation step of adhesively installing the primary heat insulation plate 10 using the coated adhesive layer 60;

A stainless steel metal panel having a corrugation 42 is welded to the upper portion of the fixed primary insulation plate 10, but the primary barrier 10 is disposed so that the corrugation 42 is located at both ends and the center of the primary insulation plate. ) Consists of a primary barrier forming step.

The first installation step is to install a fixed bolt of the hull / heat insulation plate connecting portion 80 and the fastening means on the hull, a plurality of fixed bolts at regular intervals so that the insulation system of the cargo hold for loading LNG fixedly connected to the hull. Installed, a plurality of hull / insulation plate connecting portion 80 for supporting and fixing the insulation system to the hull 70 between the fixing bolts, the level wedge 81 is installed in a portion close to the fixing bolt, the level It is to install a plurality of mastic 82 to be located between the wedges.

The secondary insulation plate installation step is a continuous installation of a plurality of secondary insulation plates so that the secondary insulation plate 20 is located on the level wedges located on both sides and the mastic located between them.

In the fastening step, the fixing bolt fixed to the hull is inserted into the hole formed in the support, and the fixing nut is fastened to the end of the fixing bolt penetrating the hole, so that the lower plate material of the secondary insulation plate positioned on both sides by one support. Fixed at the same time, or

The fixing bolt fixed to the hull is installed to penetrate the lower plate of the secondary insulation plate, and the fixing nut is fastened to the fixing bolt to penetrate the edge of the lower plate to fix the secondary insulation plate.

The secondary barrier forming step may include a tongue installation step of inserting and installing a tongue 25 on the upper portion of the secondary insulation plate 20, and inserting a strike 54 between the installed tongue 25 and the tongue 5. It consists of a welding step of welding both sides of the strike 54 to the tongue, respectively.

In addition, the secondary barrier forming step may be performed by welding two or more neighboring strikes and a welding insertion metal together on the welding insertion metal integrally formed on the upper plywood of the secondary insulation board, or welding installed on the upper plywood of the secondary insulation board. The insert metal for welding and the strike in contact with it may be formed by welding the side ends of the adjacent strike.

In addition, in order to increase the fastening strength between the secondary barrier 50 and the secondary insulation plate 20, the secondary insulation plate 20, in which the lower portion of the strike 54 forming the secondary barrier and the strike 54 are in contact with each other. The upper plywood 21 of) can be fixed by adhesive bonding.

The adhesive layer forming step is formed by applying an adhesive on the upper portion of the secondary barrier so that the space portion 61 in which the adhesive layer is not formed is formed between the welded portion 55 and the end of the adhesive layer 60.

The primary insulation plate installation step is to integrate the primary insulation plate and the secondary barrier by the adhesive layer, the adhesive layer 60 formed between the secondary barrier 50 and the primary insulation plate 10 of the primary insulation plate The lower part is adhesively installed on the secondary barrier.

In the primary barrier forming step, overlapping welding of two or more neighboring stainless steel metal panels on the welding insert metal 12 installed on the primary insulating plate 10 to form an integrated primary barrier.

At this time, the primary barrier is formed so that the protruding corrugation 42 is located at both ends and the central portion of the primary insulation plate.

The present invention made as described above has a structure in which the secondary heat insulating plate 20 is firmly fixed to the hull by the fastening means, and the primary heat insulating plate 10 and the secondary heat insulating plate 20 are alternately stacked so as to alternate with each other. The secondary barrier 50 is formed between the primary heat insulating plate 10 and the secondary heat insulating plate 20 by welding the strike 54 and the tongue 25 processed from the thin metal plate, and at the same time, the secondary barrier The primary insulating plate 10 is integrally bonded to the 50 by an adhesive, so that excellent assembly and airtightness can be secured, and the air required for conventional secondary barrier adhesion construction and airtightness inspection can be greatly shortened. have.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

As described above, the present invention is to form a secondary barrier integrally by welding, and to connect the secondary barrier and the primary insulation plate by adhesion, so that the primary insulation plate can be firmly fixed without a separate coupling means, and Securing airtightness and the heat insulating performance between the primary and secondary heat insulating layers can be improved.

In addition, the present invention is to be connected to the secondary barrier and the secondary insulation plate, there is an effect to further improve the structural safety of the secondary barrier.

In addition, the present invention is to integrally install the primary heat insulating plate to the secondary barrier by an adhesive, and has excellent assemblability and workability compared to the fixing of the primary heat insulating plate by a conventional coupling means.

In addition, the present invention is inserted into the insertion metal for welding in the secondary heat insulating plate and the primary heat insulating plate, it is possible to prevent damage to the heat insulating plate due to welding when forming the secondary barrier by welding.

In addition, the present invention is to weld the welding insert metal provided on the secondary heat insulating plate and the strike processed by a metal thin plate, it is possible to further improve the airtightness of the secondary barrier.

In addition, the present invention can reduce the production air to less than half from about 50 days to about 20 days when compared to the production of the secondary barrier by the conventional triplex adhesion, thereby improving the work efficiency and production efficiency have.

In addition, the primary insulation plate and the secondary insulation plate are stacked so as to cross each other, and the insertion insulation material is inserted into the gap portion where the fastening means is installed, so that the gap portion can be double sealed, thereby improving airtightness, and It can improve the reliability and heat insulation performance of car barriers.

In addition, the gap between the primary insulation board and another neighboring primary insulation board (gap portion of the primary insulation layer) can be maintained at about 3 to 5 mm, preferably about 4 mm, to further improve insulation performance. Can be.

In addition, the present invention is to stop the secondary heat insulating plates located on both sides at the same time by the fastening means to facilitate the construction of the secondary heat insulating plate, it is possible to shorten the working time.

In addition, the present invention is to be fixed to both sides of the secondary insulating plate by the fastening means, so that the operator can easily work, thereby improving the work efficiency there are many effects.

Claims (28)

The edges of a plurality of secondary insulation plates that are continuously installed to be connected to the hull are connected to the hull by fastening means, Forming a secondary barrier by integrating a strike processed by a thin metal plate on the secondary insulating plate by welding; After the adhesive layer is formed on the secondary barrier, the primary insulating plate is bonded to the secondary insulating plate by the adhesive layer, Install a primary barrier on the adhesive installed primary insulation plate. The primary insulation plate is a heat insulation system for a LNG storage container having a welded secondary barrier, characterized in that the upper plywood consisting of wood or synthetic resin integrally formed on the upper surface of the insulation. The method of claim 1; The secondary barrier is provided with a tongue in one direction of the secondary insulating plate in the center of the upper surface of the secondary insulating plate, both sides of the strike welded to the tongue of the one side secondary insulating plate and the tongue of another secondary insulating plate adjacent thereto. Insulating system for a liquefied natural gas storage container having a welded secondary barrier, characterized in that formed. The method of claim 1; The secondary barrier is a liquefaction having a weldable secondary barrier, characterized in that the welding insert metal is installed on the upper portion of the secondary insulating plate, two or more neighboring strikes are welded and integrated on the welding insert metal. Insulation system for natural gas storage container. The method of claim 1; The secondary barrier is provided with a welding insert metal on the secondary insulating plate, the welding insert metal and one side of the strike contact with the weld is welded at the same time, the edge of one side of the strike and another strike adjacent thereto Insulating system for liquefied natural gas storage container having a welded secondary barrier, characterized in that the contact welding is integrated. The method according to any one of claims 1 to 4; The secondary barrier is a thermal insulation system for a liquefied natural gas storage container having a welded secondary barrier, characterized in that it comprises a material selected from the metal material of Invar alloy, stainless steel, aluminum alloy. The method of claim 2 or 4; The strike is a thermal insulation system for liquefied natural gas storage container having a welded secondary barrier, characterized in that formed by bending so as to protrude in the upper direction welded on both sides. The method of claim 1; The secondary insulation plate is installed on the upper surface of the insulation, the upper plywood consisting of wood or synthetic resin, the lower surface of the insulation is installed integrally with the lower plate consisting of wood or synthetic resin or metal foil, The secondary heat insulating plate is formed so that the lower plate protrudes than the heat insulating material, The secondary heat insulating plate has a lower plate and the heat insulating material having the same length, the liquefaction having a welded secondary barrier, characterized in that the insertion groove is formed in the inner direction on the lower edge portion of the heat insulating material in contact with the upper surface of the lower plate. Insulation system for natural gas storage container. The method of claim 7; The secondary insulation plate is a heat insulating system for a LNG storage container having a welded secondary barrier, characterized in that the tongue insertion opening is installed in the center of the upper plywood in one direction of the secondary insulation plate. The method of claim 8; The tongue insertion opening is a thermal insulation system for a LNG storage container having a welded secondary barrier, characterized in that having a "T" or "L" shape. The method of claim 8 or 9; The tongue insertion opening is separated into two parts and maintains a predetermined interval, characterized in that formed in one direction of the secondary insulating plate by the upper plywood adhesively bonded to the upper portion of the heat insulating material, and the groove formed in the upper center of the polyurethane contacting the upper plywood. Insulating system for liquefied natural gas storage container having a welded secondary barrier. The method of claim 1; The fastening means includes a fixing bolt fixed to the hull so as to be positioned between the secondary insulating plate on one side and another secondary insulating plate adjacent thereto, and the holes into which the fixing bolt is inserted are formed at equal intervals and the lower both sides of the secondary insulating plate. Liquefied natural gas storage container having a support-type secondary barrier, characterized in that it comprises a support for contacting the upper surface of the lower edge portion of the lower plate, and a fixing nut fastened to the end of the fixing bolt protruding through the hole of the support. Insulation system. The method of claim 1; The fastening means has a fixing bolt fixed to the hull so as to be located between one side of the secondary insulation plate and another secondary insulation plate adjacent to it, and one hole into which the fixing bolt is inserted, the lower both sides of the lower portion of the secondary insulation plate Liquefied natural gas storage container having a welded secondary barrier, characterized in that it comprises a support that is in contact with the upper surface of the edge portion of the plate, and a fixing nut fastened to the end of the fixing bolt protruding through the hole of the support. Insulation system. The method of claim 1; The fastening means includes a fixing bolt fixed to the hull so as to be located between one side of the secondary insulating plate and another secondary insulating plate adjacent thereto, and a hole into which the fixing bolt is inserted and formed to protrude downward on both sides. Welded secondary barrier is characterized in that it comprises a support is inserted into the coupling hole formed in the lower end of the lower plate of the secondary heat insulating plate, and a fixing nut fastened to the end of the fixing bolt protruding through the hole of the support. Insulation system for LNG storage containers. The method of claim 1; The fastening means is a fixed bolt that is fixed to the hull so as to be located between one side of the secondary insulating plate and another secondary insulating plate adjacent to it, and the holes for inserting the fixing bolt is formed at equal intervals and protruded upwards on both sides Liquefaction having a welded secondary barrier, characterized in that the wing portion includes a support for contacting the upper surface of the lower plate of the secondary insulation plate and a fixing nut fastened to the end of the fixing bolt protruding through the hole of the support. Insulation system for natural gas storage container. The method of claim 1; The fastening means is provided with a fixing bolt fixed to the hull so as to be located between one side of the secondary insulating plate and another secondary insulating plate adjacent to it, and a coupling hole screwed to the fixing bolt and having a screw thread on the outer surface A first support having a support plate in contact with the lower surface of the lower plate material, a second support having an insertion hole into which the first support formed with the thread is inserted, and having a lower surface contacted with the upper surface of the lower plate material; And a fixing nut fastened to a screw thread of the first support projecting through the insertion opening of the second support. The method of claim 1; The fastening means is provided with a fixing bolt fixed to the hull so as to be located between one side of the secondary insulation plate and another secondary insulation plate adjacent to it, and one hole into which the fixing bolt is inserted, both ends of the insulation of the secondary insulation plate And a support nut inserted into an insertion groove formed in the support groove, the lower end of which is inserted into contact with the upper surface of the lower plate member of the secondary insulation plate, and a fixing nut fastened to the end of the fixing bolt protruding through the hole of the support. Insulating system for liquefied natural gas storage container having a welded secondary barrier. The method of claim 1; The fastening means has a fixed bolt that is fixed to the hull so as to be located between one side of the secondary insulating plate and another secondary insulating plate adjacent to it, and a wing having one hole into which the fixing bolt is inserted and protrudes upward on both sides Liquefied natural having a welded secondary barrier, characterized in that it comprises a support for contacting the upper surface of the lower plate of the secondary secondary insulating plate, and a fixing nut fastened to the end of the fixing bolt protruding through the hole of the support. Insulation system for gas storage containers. 18. The method of claim 14 or 17; The wing portion includes a first wing protruding upward and a second wing protruding outwardly and in a direction perpendicular to the first wing at an upper end of the first wing. Insulation system for liquefied natural gas storage container having a. The method of claim 1; The fastening means is provided with a fixing bolt on the hull, and formed a hole through which the fixing bolt is inserted through the corner of the lower plate formed to protrude outward from the polyurethane insulation material, the fixing bolt protruding upward through the hole Insulating system for liquefied natural gas storage container having a welded secondary barrier, characterized in that by fixing the nut on the end of the fixing the secondary insulating plate. The method of any one of claims 1, 11, 12, 13, 14, 15, 16, 17, 19; Thermal insulation system for a LNG storage container having a welded secondary barrier, characterized in that the insertion insulating material is installed between the secondary insulation plate and another secondary insulation plate neighboring thereto. The method of claim 1; The adhesive layer is a thermal insulation system for a liquefied natural gas storage container having a welded secondary barrier, characterized in that the width formed by coating is provided with more than 60% or more than 99% of the width of both ends of the strike. delete The method of claim 1; Insulating system for liquefied natural gas storage container having a welded secondary barrier, characterized in that the upper plywood of the primary insulating plate is integrally formed with a metal insert for welding welding of metal material. The method of claim 1 or 23; The primary insulation plate is a thermal insulation system for a LNG storage container having a welded secondary barrier, characterized in that installed to maintain a gap between the neighboring primary insulation plate and 3 to 5mm. The method of claim 1; The primary barrier is a thermal insulation system for liquefied natural gas storage container having a welded secondary barrier, characterized in that the corrugation is formed at both ends and the central portion of the primary insulation plate. The method according to any one of claims 1 to 4; Insulation system for liquefied natural gas storage container having a welded secondary barrier, characterized in that the lower portion of the strike constituting the secondary barrier and the upper plywood of the secondary insulation plate which the strike is in contact with the adhesive. . A first installation step of installing a fixing bolt of the hull / heat insulation plate connection portion and the fastening means on the hull; A secondary insulation plate installation step of continuously installing a secondary insulation plate on the hull / heat insulation plate connection unit; A fastening step of simultaneously fixing the continuously installed one side secondary heat insulating plate and another secondary heat insulating plate adjacent thereto by a fastening means; A secondary barrier forming step of forming a secondary barrier by integrating a plurality of strikes processed by a metal thin plate on the upper part of the fixed secondary insulating plate by welding; An adhesive layer forming step of forming an adhesive layer by applying an adhesive to the formed secondary barrier; A primary insulation plate installation step of adhesively installing the primary insulation plate using the coated adhesive layer; Insulating construction method for a liquefied natural gas storage container having a welded secondary barrier consisting of forming a primary barrier having a corrugation on top of the adhesively installed primary insulating plate. 28. The method of claim 27; The secondary barrier forming step is a welding type, characterized in that the tongue is inserted into the upper portion of the fixed secondary insulating plate is installed, the strike is inserted between the tongue and the tongue installed, and weld both sides of the strike to the tongue, respectively. Insulation construction method for LNG container with secondary barrier.

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