JP2010528241A - Thermal insulation system for liquefied natural gas storage container with welded secondary barrier and its construction method - Google Patents

Abstract

The present invention relates to a heat insulation system for a liquefied natural gas storage container having a welded type secondary barrier and its construction method, and its purpose is to form a secondary barrier by integrating strakes processed into a metal thin plate by welding. Welding type secondary barrier that shortens the work process and work time and improves the firmness of the heat insulation layer by bonding the primary heat insulation plate to the secondary barrier integrally with the secondary heat insulation plate alternately. It is providing the heat insulation system for liquefied natural gas storage containers provided with, and its construction method.
In the present invention, a plurality of secondary heat insulating plates that are continuously installed so as to be connected to the hull are connected and installed to the hull by fastening means, and the strake processed into a metal thin plate is integrally formed on the upper portion of the secondary heat insulating plate by welding. A secondary barrier is formed, and an adhesive layer is formed on the upper portion of the secondary barrier, and then the primary heat insulating plate is bonded and installed alternately with the secondary heat insulating plate using the adhesive layer. A primary barrier is installed on top of the insulation board.

Description

  The present invention relates to a heat insulation system for a liquefied natural gas storage container having a welded type secondary barrier and its construction method. The secondary heat insulating plate is firmly fixed to the hull by a fastening means, and the secondary barrier is made of Invar alloy. It is installed in a single unit by welding of the strakes processed into thin metal plates such as stainless steel and aluminum alloy, and alternately laminated at the corners of the primary and secondary insulation plates. The present invention relates to a heat insulation system for a liquefied natural gas storage container having a welded secondary barrier in which a heat insulating plate is bonded and installed with an adhesive to dramatically improve heat insulation, air tightness, and workability, and a construction method thereof.

  Insulating containers that store and transport cryogenic liquefied gas are very important today, mainly using low temperature liquefaction methods to store and transport large quantities of materials such as hydrogen, oxygen and natural gas. . In designing an insulated container, a thermal insulation technique for preventing boiling of the liquefied gas due to heat transfer from the outside and a technique for preventing the exposure of the liquefied gas are the most important.

  The heat insulation methods currently applied commercially include an external heat insulation method and an internal heat insulation method, and the internal heat insulation method can control the temperature of the container box in a similar manner to the outside air temperature. There is an advantage that there are no restrictions on the use of such materials.

  FIG. 31 shows a heat insulation structure of a conventional LNG carrier cargo hold. The heat insulation system includes a double barrier structure including an upper primary heat insulation plate 510, a lower secondary heat insulation plate 520, a membrane primary barrier wall 550 made of stainless steel, and a triple secondary barrier wall 530. These thicknesses are 100 mm and 170 mm, respectively. Also, in such a heat insulation system, when the heat insulating plate is installed on the inner wall of the heat insulating container, the joint between the heat insulating plate and the heat insulating plate is called a flexible triplex for the purpose of ensuring airtightness from the joint of the secondary barrier. Adhering and sealing with the secondary barrier material 531, it is installed by a two-stage operation in which the top is again used with the connection plate 540 made of the same material as the primary heat insulating plate, and it takes a lot of time for the operation. In addition, there are many problems such as requiring considerable construction attention to ensure airtightness at the secondary barrier joint.

  In addition, the conventional heat insulation system as described above is configured such that the primary heat insulation plate is preliminarily joined to the center of the upper surface of the secondary heat insulation plate, and when the secondary heat insulation plate is fixed to the hull, In order to avoid interference, a fastening hole is processed on both sides of the secondary heat insulating plate, and the secondary heat insulating plate is fixed to the hull through the fastening hole.

  However, in such a conventional heat insulation system, the flatness in the length direction can be controlled by a jig by arranging fastening holes on both sides of the secondary heat insulation plate, but the center of the secondary heat insulation plate in the width direction can be controlled. The flatness cannot be controlled because the fastening hole of the fastening plate of the secondary heat insulating plate is located at the end of the heat insulating plate by pre-bonding the primary heat insulating plate, and the secondary heat insulating plate is used to reinforce this. There was a problem that a plurality of fastening holes had to be arranged on both sides of the plate.

  In particular, when such a number of fastening holes are machined, there may be an adverse effect on the performance of the heat insulation system, and there are various problems such as the assembly process requiring a lot of time and the work being delayed. there were.

  The present invention is intended to solve the above-described problems, and its purpose is to integrate a stretch machined into a metal thin plate by welding to form a secondary barrier, and to form a secondary insulation on the secondary barrier. A heat insulation system for a liquefied natural gas storage container having a welded secondary barrier that can shorten the work process and the work time and improve the firmness of the heat insulation layer, and a construction method thereof are provided. That is.

  Another object of the present invention is to provide a heat insulation system for a liquefied natural gas storage container and its construction method, which can easily and firmly support a secondary heat insulation plate on a hull by a fastening means, and can improve assembly and overall workability. It is to be.

  Another object of the present invention is to form a metal material secondary barrier mostly by resistance welding, shorten the work process and work period, and improve productivity.

  Still another object of the present invention is to provide a welded secondary barrier that can form excellent heat insulation, airtightness and workability by integrally forming a heat insulation system by welding and adhesive, improving workability and assembly. It is providing the heat insulation system for liquefied natural gas storage containers and its construction method.

  Another object of the present invention is to protect the secondary heat insulating plate when welding the inserted metal inserted on the secondary heat insulating plate and processing the metal processed into a thin metal plate, and to prevent the welding type inserted metal and the It is providing the heat insulation system for liquefied natural gas storage containers which has the welding type secondary barrier which improved the airtightness of the secondary barrier by welding, and its construction method.

  Another object of the present invention is to provide an integrated secondary body having excellent hermeticity by installing a tongue-like member on a secondary heat insulating plate and welding the tongue-like member and a strake processed into a metal thin plate. Is to provide a barrier.

  Still another object of the present invention is to arrange a fastening hole in the center of the secondary heat insulating plate to form a uniform bolt fastening pressure in the length and width directions of the secondary heat insulating plate, through which the length and width directions are formed. It is to provide a heat insulation system for a liquefied natural gas storage container having a welded type secondary barrier capable of improving the flatness control and the fastening degree, and a construction method thereof.

  Another object of the present invention is for a liquefied natural gas storage container having a welded secondary barrier capable of firmly fixing a secondary heat insulating plate to a hull while improving assembly and workability through a reduction in the number of fastening holes. It is to provide an insulation system and its construction method.

  Still another object of the present invention is to provide a welding mold 2 that can improve the overall heat insulation performance of the heat insulation system by alternately bonding and installing the primary heat insulation plates on the upper side of the secondary heat insulation plate in which the fastening holes are formed. It is providing the heat insulation system for liquefied natural gas storage containers which comprise a secondary barrier, and its construction method.

  In the present invention, a plurality of secondary heat insulating plates that are continuously installed so as to be connected to the hull are connected and installed to the hull by fastening means, and the strake processed into a metal thin plate is integrated on the upper portion of the secondary heat insulating plate by welding. After forming a secondary barrier and forming an adhesive layer on the upper side of the secondary barrier, the primary heat insulating plate is bonded and installed alternately with the secondary heat insulating plate by using this, and the primary heat insulating material that is bonded and installed A primary barrier is installed at the top of the plate.

  In the present invention, a fastening hole is arranged at the center of the secondary heat insulating plate, and the secondary heat insulating plate is fixed to the hull using a fastening means in the fastening hole, and then a fastening plug is inserted into the fastening hole and finished. The corners of the secondary heat insulating plate and the corners of the primary heat insulating plate are alternately installed with the primary heat insulating plate.

  In the present invention, the secondary barrier is integrally formed by welding, and the secondary barrier and the primary heat insulating plate are connected by bonding, and the primary heat insulating plate is firmly fixed without any separate connecting means. It is possible to secure the airtightness and improve the heat insulation performance between the first and second heat insulation layers.

  Further, the present invention is such that the primary heat insulating plate is integrally installed on the secondary barrier by an adhesive, and has excellent assembly and workability as compared with the fixing of the primary heat insulating plate by the conventional coupling means. .

  In the present invention, the insertion metal for welding is inserted and installed in the secondary heat insulating plate and the primary heat insulating plate, and when the secondary barrier is formed by welding, the heat insulating plate can be prevented from being damaged by welding.

  Moreover, the present invention is adapted to weld the inserted metal for welding installed on the secondary heat insulating plate and the strake processed into the metal thin plate, and further improve the airtightness of the secondary barrier.

  In addition, when the present invention is compared with the production of the existing secondary barrier by triple bonding, the production period can be shortened to about half from about 50 days to about 20 days, thereby improving work efficiency and production efficiency.

  In addition, the corners of the primary heat insulating plate and the secondary heat insulating plate are alternately laminated, and the insertion heat insulating agent is inserted into the gap portion where the fastening means is installed, and the gap portion is sealed in a double manner. This improves the airtightness and improves the reliability and heat insulation performance of the secondary barrier.

  Moreover, the space | interval of the clearance gap between the primary heat insulation board and the other primary heat insulation board which adjoins this (space | gap part of a primary heat insulation layer) can be maintained at about 3-5 mm, Preferably about 4 mm, The heat insulation performance can be further improved.

  In the present invention, the secondary heat insulating plates located on both sides are fixedly supported by the fastening means at the same time so that the construction of the secondary heat insulating plates can be facilitated and the working time can be shortened.

  Further, according to the present invention, both sides of the secondary heat insulating plate are fixedly supported by the fastening means, so that the operator can easily work, thereby improving the work efficiency.

  In the present invention, a fastening hole for fixing the secondary heat insulating plate is arranged at the center of the secondary heat insulating plate, and a uniform bolt fastening pressure acts in the length and width directions of the secondary heat insulating plate. Thus, the length of the secondary heat insulating plate and the flatness in the width direction can be improved, and the amount of deformation can be minimized.

  Further, according to the present invention, the secondary heat insulating plate can be firmly fixed even with a small number of fastening holes, thereby increasing the assembling property and workability.

  In addition, the present invention has many effects such that the corners of the primary heat insulating plate and the secondary heat insulating plate are alternately arranged to prevent the heat insulating performance from being deteriorated by the fixed portion of the primary heat insulating plate and the fixed portion of the secondary heat insulating plate. is there.

It is sectional drawing which shows the schematic structure by this invention. It is the A section enlarged view of FIG. It is sectional drawing which shows the 1st modification by this invention. It is sectional drawing which shows the 2nd modification by this invention. It is sectional drawing which shows the welding state of the 2nd modification by this invention. It is the B section enlarged view of FIG. It is a figure which shows the structure of the fastening means by this invention. It is a figure which shows the 1st deformation state of the fastening means by this invention. It is a figure which shows the 2nd deformation state of the fastening means by this invention. It is a figure which shows the 3rd deformation state of the fastening means by this invention. It is a figure which shows the 4th deformation state of the fastening means by this invention. It is a figure which shows the 5th deformation state of the fastening means by this invention. It is a figure which shows the 6th deformation state of the fastening means by this invention. It is a figure which shows the 7th deformation state of the fastening means by this invention. It is a figure which shows the structure of the secondary barrier formed from the metal material thin plate by this invention. 4 is a flowchart illustrating an installation process according to the present invention. It is a figure which shows the installation process by this invention. It is a fragmentary figure which shows the installation state by this invention. It is a disassembled perspective view which shows the installation by this invention. It is a figure which shows the installation state by this invention. It is a figure which shows the assembly structure of the secondary heat insulation board using a fastening hole. It is a figure which shows arrangement | positioning of the fastening hole by this invention. It is a figure which shows the top view and deformation | transformation degree of the secondary heat insulation board assembled using the fastening hole by this invention. It is a figure which shows the arrangement | positioning relationship of the secondary heat insulating board assembled using the fastening hole by this invention, and a primary heat insulating board. It is a figure which shows the distortion grade by the Example of this invention. It is a figure which shows the 1st arrangement | positioning state by which the fastening hole by this invention was deform | transformed. It is a figure which shows the 2nd arrangement | positioning state by which the fastening hole by this invention was deform | transformed. It is a figure which shows the 3rd arrangement | positioning state by which the fastening hole by this invention was deform | transformed. It is a figure which shows arrangement | positioning of the conventional fastening hole. It is a figure which shows the distortion grade by arrangement | positioning of the conventional fastening hole. It is a figure which shows the heat insulation structure of the cargo hold of the conventional LNG cargo ship.

  In the present invention, a plurality of secondary heat insulating plates 20 to be continuously installed so as to be connected to the hull 70 are connected to the hull 70 by fastening means 90 and processed into a thin metal plate on the secondary heat insulating plate 20. After the formed streak 54 is integrated by welding to form a secondary barrier 50 and an adhesive layer 60 is formed on the upper portion of the secondary barrier 50, the primary heat insulating plate 10 and the secondary heat insulating plate 20 are alternately used. The primary barrier 40 is installed on the upper part of the primary heat insulating plate 10 which is bonded and installed.

  That is, the present invention includes a plurality of secondary heat insulating plates 20 to be continuously installed so as to be connected to the hull 70 by the hull / heat insulating plate connecting portion 80, the one side secondary heat insulating plate, and the other side adjacent thereto. Fastening means 90 installed between the secondary heat insulating plate and the secondary heat insulating plate fixedly installed on the hull 70, and a strage processed into a thin metal plate located above the secondary heat insulating plate. A secondary barrier 50 formed integrally by welding, a primary heat insulating plate 10 positioned at the upper part of the secondary barrier and having a lower secondary heat insulating plate and corners alternately installed, and a primary heat insulating plate 10 and the secondary barrier 50, the adhesive layer 60 which adheres the primary heat insulating board 10 and the secondary barrier 50 integrally, and the primary welded and installed on the upper surface of the primary heat insulating board 10 And a barrier 40.

  The primary barrier 40 installed on the upper portion of the primary heat insulating plate has a plurality of corrugations 42 that are raised upwardly so as to facilitate expansion and contraction of the primary barrier 40 in response to temperature changes caused by the loaded cargo. Is formed.

  The secondary barrier is made of a metal material such as Invar alloy, stainless steel, aluminum alloy, etc., and is integrally formed so as to maintain airtightness by welding, and is connected to a secondary heat insulating plate and fixedly installed. .

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

  1 is a sectional view showing a schematic configuration according to the present invention, FIG. 2 is an enlarged view of a portion A in FIG. 1, FIG. 3 is a sectional view showing a first modification according to the present invention, and FIG. 4 is a second modification according to the present invention. FIG. 5 is a cross-sectional view showing a welding state of a second modification according to the present invention, and FIG. 6 is an enlarged view of a portion B in FIG.

  In the present invention, a plurality of secondary heat insulating plates 20 to be installed are continuously installed to form a secondary heat insulating layer 200, and a plurality of primary heat insulating plates 10 are continuously installed on top of the primary heat insulating plate. Layer 100 is formed. A heat insulation system for a liquefied natural gas storage container in which a secondary barrier is located between the primary heat insulation layer 100 and the secondary heat insulation layer 200, and the primary barrier 40 is installed on top of the primary heat insulation layer 100. The secondary heat insulating plate is firmly fixed and supported on the hull by fastening means, and the secondary barrier is integrally connected to the secondary heat insulating plate by welding of a strake processed into a metal thin plate. The heat insulating plate is laminated and installed by the adhesive layer applied and formed on the secondary barrier so that the corners of the secondary heat insulating plate located at the lower portion and the corners are alternated, and the primary barrier is formed on the upper portion of the primary heat insulating plate. The

  The secondary barrier 50 is installed so as to be positioned above the secondary heat insulating plate. As shown in FIGS. 1 and 15, the tongue-like member 25 installed on the secondary heat insulating plate on one side, and this Is inserted between the tongue member 25 on the other side of the secondary heat insulating plate adjacent to the other and the metal material strake 54 is welded and integrated with the tongue member 25 in contact with the both sides.

  That is, the secondary barrier wall 50 located on the upper part of the secondary heat insulating plate 20 is formed by welding the tongue-like member 25 inserted into the tongue-like member insertion port 24 of the secondary heat insulating plate and the strake 54.

  The tongue-like member 25 is connected to and supported by a secondary heat insulating plate for a secondary barrier formed by welding, and is inserted and installed in one direction of the secondary heat insulating plate. That is, the tongue-like member 25 is installed so that the lower part penetrates the upper plywood of the secondary heat insulating plate and the upper part protrudes outside the upper plywood of the secondary heat insulating plate.

  As shown in FIG. 1 and FIG. 15, the strake 54 processed into the metal thin plate has welded portions 55 on both side ends, and the welded portion 55 is folded so that both end portions of the strake 54 protrude upward. It is formed. That is, the strake 54 corresponds to a welded portion 56 in which both side ends are bent so as to have the same height in the upper direction, and a part of the bent portion that protrudes in this way is substantially welded.

  The welded portion 55 is a portion that comes into contact with the tongue-like member 25 installed so as to protrude from the center of the secondary heat insulating plate 20 when the strake 54 is installed, and is integrated with the tongue-like member 25 by welding as shown in FIG. Is done.

  That is, the welded portions 55 located on both sides of the strake 54 are the tongue-like member 25 installed on the secondary heat insulating plate on one side and the tongue-like member 25 installed on the secondary heat insulating plate on the other side adjacent thereto. The welded portions 55 on both sides are in contact with each other, and the welded portions 55 and the tongue member 25 in contact with each other are integrated so as to maintain airtightness by resistance welding or the like.

  The secondary heat insulating plate 20 is made of a heat insulating material 23 made of polyurethane material, and is placed on the hull / heat insulating plate connecting portion. An upper plywood 21 made of wood or synthetic resin and a lower thin plate 22 made of wood, synthetic resin or metal thin plate are integrally formed on the upper and lower surfaces.

  The secondary heat insulating plate 20 is formed such that the lower plate 22 protrudes from the polyurethane heat insulating material 23. The lower plate material 22 and the heat insulating material 23 have the same length. An insertion groove 28 having a predetermined length may be formed at a lower corner portion of the heat insulating material 23 that contacts the upper surface of the lower plate material 22.

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

  Further, as shown in FIGS. 1 and 2, a tongue-like member 25 of the secondary barrier wall is inserted and installed in one direction of the secondary heat insulating plate 20 in the upper central portion of the upper plywood 21 of the secondary heat insulating plate “T”. A “L” -shaped tongue-shaped member insertion port 24 is formed. That is, the tongue-like member 25 of the secondary barrier is inserted and installed in the tongue-like member insertion port 24 formed in the upper central portion of the upper plywood of the secondary heat insulating plate, and then the primary heat insulating plate to be joined to the secondary barrier thereafter. Will be supported.

  The tongue-shaped member insertion port 24 is formed by mechanically processing the portion where the secondary heat insulating plate 20 contacts the upper plywood 21 and the upper plywood 21, and as shown in FIG. A secondary heat insulating plate is formed by forming a groove having a depth of 1 to 5 mm so that the tongue-like member 25 can be inserted in the central portion, and adhesively bonding an upper plywood 21 which is cut into two or more portions and divided into the upper portion thereof. The tongue-shaped member insertion port 24 is configured in one direction.

  The tongue-like member insertion port 24 configured by the above-described method is easier to manufacture and inspect for defects than the conventional method of providing a connecting groove inside a woody reinforcing plate, and includes the tongue-like member insertion port 24. There are many advantages to producing the secondary thermal insulation layer 200.

  As described above, the secondary barrier according to the present invention is inserted and installed in the tongue-shaped member insertion opening formed in one direction at the center of the upper surface of the secondary heat insulating plate 20 and protrudes above the secondary heat insulating plate. A welded portion 55 formed on both sides of the strake 54 is welded to a part of the tongue-like member 25 so as to be integrally formed.

  In the secondary barrier 50, the welded portions 55 on both sides of the strake 54 are welded to the tongue-like member 25, and the bent portion of the welded tongue-like member 25 is a tongue-like shape in the upper plywood 21 of the secondary heat insulating plate 20. Although supported and fixed by the member insertion port 24, the secondary surface where the strake 54 comes into contact with a part of the lower surface of the strake 54 constituting the secondary barrier in order to increase the fastening strength of the secondary barrier 50 and the secondary heat insulating plate 20. A part of the upper plywood 21 of the heat insulating plate 20 may be bonded and fixed with an adhesive.

  In addition, the tongue-like member 25 and the strake 54 forming the secondary barrier 50 have a length that can cover a plurality of secondary heat insulating plates so that the continuously installed secondary heat insulating plates can be continuously sealed. Prepare.

  Further, as shown in FIGS. 3 to 5, the welding type secondary barrier is formed by inserting and inserting a welding insert metal into the upper plywood of the secondary heat insulating plate, so that two or more adjacent welding metal inserts on the welding insert metal. We can form the above-mentioned strake by welding the adjacent metal and the other end of the adjacent strake, by welding the strake or by welding the welding metal inserted in the upper plywood of the secondary insulation board and the striking contact. .

  That is, FIG. 3 is a cross-sectional view showing a first modification of the secondary barrier according to the present invention. The secondary barrier 50b has a welding insert metal 51b installed on the upper plywood of the secondary heat insulating plate, and the welding insert metal 51b. And one side of the strake 54b in contact therewith are welded, and the one-side l-strike 54b and the corner of the other-side streak 54b are contact-welded and integrated with each other. At this time, weld portions 55b for welding are formed on both sides of the strake 54b.

  That is, according to the present invention, one or more welding insertion metals 51b are respectively installed on the upper plywood of the secondary heat insulating plate, and the welding insertion metal and a portion of the strake 54b in contact with the welding insertion metal are welded simultaneously. The welded portions of the strake are contact-welded with each other to form an integrated secondary barrier 50b.

  As shown in FIG. 3, the welding insert metal 51b is installed at each corner portion on both sides of the upper plywood of the secondary heat insulating plate, or one or more are installed at arbitrary positions. A portion is welded at weld site 56b.

  FIG. 4 is a sectional view showing a second modification of the secondary barrier according to the present invention. The secondary barrier 50a has a welding insert metal 51a installed on the upper portion of the secondary heat insulating plate, and the welding insert metal 51a. Two or more strakes 54a adjacent to each other are welded together with the welding insertion metal 51a to be integrated. That is, the secondary barrier wall 50a is configured such that two or more strakes adjacent to the welding insertion metal are integrated by welding on the welding insertion metal 51a.

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

  As described above, the secondary barrier walls 50a, 50b, and 50 of the present invention have the welding metal inserts 51a, 51b or the tongue-like member 25 inserted and installed in the secondary heat insulating plate, and the welding metal inserts 51a, 51b or tongue. Strikes 54a, 54b, 54 processed into a metal thin plate are welded to the shaped member 25 to be integrally formed, and such a welded type secondary barrier according to the present invention is limited to the above modification. Not including a welding type secondary barrier integrated by welding.

  Further, an adhesive is applied to the upper part of the secondary barriers 50, 50a, 50b of the present invention and the modification according to the present invention configured as described above, that is, the upper part of the strakes 54a, 54b, 54 so as to adhere to each other. The agent layer 60 is formed, and the secondary heat insulating plate 10 is bonded and integrated with the formed adhesive layer 60.

  The lower plate member 22 is made of wood, synthetic resin, or metal thin plate, and is installed so as to be positioned on the hull / heat insulating plate connecting portion 80. The corner portion is directly bonded to the fastening means 90 and is fixedly supported by crimping of the fastening means. . That is, the entire secondary heat insulating plate 20 is fixed by the fixing support of the lower plate member 22 as described above.

  The hull / heat insulating plate connecting portion 80 includes a level wedge 81 having a supporting force and a mastic 82 that is an adhesive for fixing the secondary heat insulating plate to the hull when the secondary heat insulating plate is installed by the fastening means. Become.

  The fastening means 90 firmly supports the secondary heat insulating plate on the hull, and the secondary heat insulating plate 20 is fixedly installed on the hull 70 by fastening a fixing bolt and a fixing nut.

  That is, the fastening means includes a fixing bolt fixedly supported on the hull, a hole through which the fixing bolt penetrates, a support that is pressure-bonded to the lower plate of the secondary heat insulating plate, and a hole in the support. It consists of a fixing nut that is connected to the end of the fixing bolt that penetrates and fixes the support. In the case of the secondary heat insulating plate formed so that the lower plate material protrudes from the polyurethane heat insulating material, the fastening means of the present invention can directly support the lower plate material of the secondary heat insulating plate by the fixing bolt and the fixing nut without the support. Good.

  Further, an elastic washer may be inserted and installed in the lower portion of the fixed nut 93 for smooth fastening of the bolt and nut.

  Next, the fastening means according to the present invention will be described in detail with reference to the accompanying drawings. Further, the fastening means according to the present invention can be variously modified as shown in FIGS. 6 to 14 depending on the structure of the secondary heat insulating plate and the structure of the support.

  6 to 11 show fastening means for the secondary heat insulating plate in which the lower plate of the secondary heat insulating plate protrudes from the polyurethane heat insulating material. 12 and 13 show a fastening means for the secondary heat insulating plate in which an insertion groove is formed at a corner portion of the lower portion of the heat insulating material that comes into contact with the lower plate material. FIG. 14 shows a fastening means for fixing the secondary heat insulating plate formed by protruding the lower plate member of the secondary heat insulating plate from the polyurethane heat insulating material with fixing bolts and fixing nuts without installing a support.

  6 is an enlarged view of a portion B in FIG. 1, and FIG. 7 is a diagram showing the configuration of the fastening means. The fastening means 90 according to the present invention includes a fixing bolt 91 fixedly installed on the hull so as to be positioned between the secondary heat insulating plate on one side and the secondary heat insulating plate on the other side, and the fixing bolt is inserted. Holes 94 are formed at equal intervals, and both lower sides are bonded to the upper surface of the corner portion of the lower plate member of the secondary heat insulating plate 20, and fixing bolts 91 that protrude through the holes 94 of the support member. And a fixing nut 93 that is fastened to the end.

  The fastening means 90 configured as described above is such that the lower side of the support body 92 is bonded and supported to the upper surface of the lower plate member 22 from which the secondary heat insulating plate protrudes, and when the fixing nut 93 and the fixing bolt 91 are fastened, the support body 92 is supported. The secondary heat insulating plate 20 is fixed by simultaneously pressing and supporting the lower plate material 22 of the secondary heat insulating plate located on both sides.

  That is, the fastening means 90 of the present invention shown in FIGS. 6 and 7 simultaneously supports the corner portions of the secondary heat insulating plate 20 located on both sides by a single support 92 into which a plurality of fixing bolts 91 are inserted. .

  FIG. 8 is a view showing a first deformation state of the fastening means according to the present invention. The fastening means 90a indicating the first deformation state includes a fixing bolt 91a fixedly installed on the hull so as to be positioned between the secondary heat insulating plate on one side and the secondary heat insulating plate on the other side. A support 92a having a hole 94a into which the fixing bolt is inserted and having both lower sides in contact with the upper surface of the corner portion of the lower plate of the secondary heat insulating plate, and protruding through the hole 94a of the support And a fixing nut 93a fastened to the end of the fixing bolt 91a.

  That is, the fastening means 90a showing the first deformed state shown in FIG. 8 is a modification of the structure of the support shown in the fastening means shown in FIGS. 6 and 7, and the support shown in the fastening means 90 shown in FIGS. In contrast to the plate 92 having 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. It has a plate shape with a short length in which only one hole 94a is inserted.

  As described above, the support body of the fastening means shown in FIGS. 6 and 7 can support the secondary heat insulating plates located on both sides by one support body, but there are a plurality of support bodies in the first deformation state shown in FIG. The secondary heat insulating plates located on both sides are supported by the support body, and the fastening means as described above has respective advantages in assembling work and a firm fixed state.

  Moreover, FIG. 9 shows the figure which shows the 2nd deformation | transformation state of the fastening means by this invention. The fastening means 90b showing the second deformation state includes a fixing bolt 91b fixedly installed on the hull so as to be positioned between the secondary heat insulating plate on one side and the secondary heat insulating plate on the other side. One hole 94b into which the fixing bolt is inserted is formed, and a coupling body 95b protruding downward on both sides is inserted into a coupling hole 29 ′ formed in a corner portion of the lower plate member of the secondary heat insulating plate. The support 92b and a fixing nut 93b fastened to the end of the fixing bolt 91b protruding through the hole 94b of the support.

  That is, the support body 92b of the fastening means 90b showing the second deformed state is formed with the coupling body 95b projecting downward at both ends, and the coupling plate 29 'is formed in the projecting lower plate material 22 of the secondary heat insulating plate. The supporting body is installed so that the joined body is inserted into the coupling hole formed in the lower plate of the secondary heat insulating plate, and the fixing nut is fixed to the end of the fixing bolt that penetrates the hole of the supporting body. Are fastened to support the secondary heat insulating plate.

  The fastening means 90b having such a configuration is such that the combined body of the support body is coupled into a coupling hole formed in the lower plate material of the secondary heat insulating plate, and the secondary heat insulating plate is more firmly fixed. can do.

  FIG. 10 is a view showing a third deformation state of the fastening means according to the present invention. The fastening means 90c includes a fixing bolt 91c fixedly installed on the hull so as to be positioned between the secondary heat insulating plate on one side and the secondary heat insulating plate on the other side, and a hole into which the fixing bolt is inserted. 94c is formed at equal intervals, and a blade portion 95c protruding upward in both sides is protruded through a support 92c contacting the upper surface of the lower plate member of the secondary heat insulating plate, and through the hole of the support The fixing nut 93c is fastened to the end of the fixing bolt.

  That is, the support body of the fastening means showing the third deformed state has a blade portion 95c protruding upward at both ends, the blade portion 95c protruding upward and the first blade portion 96c, A second blade 97c is provided at the upper end of the first blade portion so as to protrude in a direction perpendicular to the first blade and outward.

  The fastening means 90c configured as described above and showing the third deformation state of the present invention is such that when the fixing bolt 91c and the fixing nut 93c are fastened, both side surfaces of the first blade 96c of the support 92c are the lower part of the secondary heat insulating plate. The lower surface of the second blade 97c is in contact with the side surface of the plate material, and is in contact with the upper surface of the corner portion of the lower plate material of the secondary heat insulating plate to support the secondary heat insulating plate.

  Moreover, FIG. 11 is a figure which shows the 4th deformation state of the fastening means by this invention. The fastening means 90d is screwed to the fixing bolt 91d and a fixing bolt 91d fixedly installed on the hull so as to be positioned between the secondary heat insulating plate on one side and the secondary heat insulating plate on the other side. A first support 92d having a coupling port 94d and having a screw thread 95d on the outer surface and a support plate 96d in contact with the lower surface of the lower plate member on the lower surface, and a first support body 92d on which the screw thread 95d is formed. The second support body 98d is provided with an insertion port 97d into which the lower surface is brought into contact with the upper surface of the lower plate member, and the second support body 98d is projected through the insertion port 97d of the second support body. It is comprised from the fixing nut 93d fastened to the thread 95d of 1 support body.

  In other words, the fastening means 90d in the fourth deformed state first fastens the first support 92d to the fixing bolt 91d to continuously position the secondary heat insulating plate, and then the upper portion of the lower plate of the secondary heat insulating plate. The second support 98d is installed on the first support 92d so as to come into contact with the surface, and the fixing nut 93d is fastened to the thread 95d of the first support that protrudes through the insertion port 97d of the second support. The secondary heat insulating plate is firmly fixed by the first and second supports 92d and 98d.

  FIG. 12 is a view showing a fifth deformation state of the fastening means according to the present invention. The fastening means 90e includes a fixing bolt 91e that is fixedly installed on the hull so as to be positioned between the secondary heat insulating plate on one side and the secondary heat insulating plate on the other side, and one bolt into which the fixing bolt is inserted. The holes 94e are provided and both end portions are inserted into the insertion grooves 28 formed in the heat insulating material of the secondary heat insulating plate, and the lower portions on both sides are brought into contact with the upper surfaces of the corner portions of the lower plate material of the secondary heat insulating plate. And a fixing nut 93e fastened to the end of the fixing bolt 91e protruding through the hole 94e of the supporting body.

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

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

  FIG. 13 is a view showing a sixth deformation state of the fastening means according to the present invention. The fastening means 90f includes a fixing bolt 91f fixedly installed on the hull so as to be positioned between the secondary heat insulating plate on one side and the secondary heat insulating plate on the other side, and one fastening bolt is inserted. A support body 92f that has holes 94f and protrudes upwards on both sides in contact with the upper surface of the lower plate member of the secondary heat insulating plate, and a fixing that protrudes through the holes 94f of the support body. The fixing nut 93f is fastened to the end of the bolt 91f.

  In other words, the support body of the fastening means showing the sixth deformed state has a blade portion 95f protruding upward at both ends, and the blade portion 95f has a first blade 96f protruding upward and a first blade The upper end of 96f is configured to include a second blade 97f protruding in the direction orthogonal to the first blade and outward.

  The fastening means showing the sixth deformation state of the present invention configured as described above is such that when the fixing bolt and the fixing nut are fastened, both side surfaces of the first blade of the support come into contact with the side surface of the lower plate of the secondary heat insulating plate. Then, the lower surface of the second blade is brought into contact with the upper surface of the corner portion of the lower plate of the secondary heat insulating plate to support the secondary heat insulating plate.

  The support shown in the fastening means in the sixth deformed state configured as described above is formed with only one hole into which the fixing bolt is inserted, but supports the fastening means in the third deformed state shown in FIG. In the body, a plurality of holes into which fixing bolts are inserted are formed at equal intervals.

  That is, the support body of the fastening means showing the sixth deformation state shown in FIG. 13 is adapted to support the secondary heat insulating plates located on both sides by a plurality of support bodies, but the third deformation state shown in FIG. The support in the state can simultaneously support the secondary heat insulating plates located on both sides by one support, and the blade portion of the support is inserted into the insertion groove formed in the heat insulating material of the secondary heat insulating plate. Thus, the secondary heat insulating plate can be firmly fixed while having excellent heat insulating performance.

  FIG. 14 is a view showing a seventh modified state of the fastening means according to the present invention. The fastening means 90g in the seventh deformed state shown in FIG. 14 fixes the secondary heat insulating plate only with a fixing bolt and a fixing nut without installing a support. That is, a fixing bolt 91g is installed in the hull 70, and a hole 29 through which the fixing bolt 91g is inserted and penetrated is formed at a corner portion of the lower plate member formed so as to protrude from the polyurethane heat insulating material. A fixing nut 93g can be fastened to the end of the protruding fixing bolt 91g to directly fix the secondary heat insulating plate.

  The fastening means installed in this manner directly fixes the lower plate material protruding from the heat insulating material of the secondary heat insulating plate, and can be provided with excellent assemblability and firm support force.

  As described above, in the present invention, the secondary heat insulating plate is continuously and firmly fixed and installed on the hull by the fastening means configured as shown in FIGS.

  Further, the secondary heat insulating layer formed by the secondary heat insulating plate continuously installed as described above is fastened between the secondary heat insulating plate on one side and the secondary heat insulating plate on the other side. The gap portion 27 where the means is installed is generated, and the insertion heat insulating material 26 is inserted into the gap portion 27. At this time, the inserted heat insulating material 26 is the same inserted heat insulating material as that of the primary and secondary heat insulating plates 10 and 20 or a known high-performance heat insulating material.

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

  In addition, the adhesive layer 60 may have a width of about 60% or more, desirably about 70% or more and less than 99% of the width of both ends of the strake. That is, when the width of the adhesive layer 60 is formed to be less than 60%, the fixing force of the primary heat insulating plate may be reduced. It is desirable to adhere to.

  The primary heat insulating plate 10 is installed by an adhesive layer applied and formed on the secondary barrier. 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 material. Is formed.

  In addition, when the primary barrier 40 is welded to the primary heat insulating plate 10 at the upper portion of the upper plywood 11, an insertion metal 12 for welding is installed so that the primary heat insulating plate 10 can be easily protected and welded. Yes.

  Further, the heat insulating material 13 of the polyurethane material of the primary heat insulating plate 10 and the upper plywood 11 are formed by mutual bonding, and the heat insulating material 23 of the polyurethane material of the secondary heat insulating plate 20, the upper plywood, and the lower plate materials 21, 22 are also formed. It is formed by mutual adhesion.

  In addition, a gap portion 14 where a welding portion of the tongue-like member and the stroke is located is generated between the primary heat insulating plate and another primary heat insulating plate adjacent thereto, and such a gap portion 14 is It has a width of about 3-5 mm, preferably about 4 mm.

  That is, since the primary heat insulating plate is integrally bonded to the secondary barrier by the adhesive layer, there is a gap between the primary heat insulating plate on one side and the primary heat insulating plate on the other side. The primary heat insulating plates are densely installed so as to be as narrow as about 3 to 5 mm, thereby improving the heat insulating performance.

  The primary barrier 40 is installed so as to be positioned above the primary heat insulating plate 10, and a stainless steel metal panel including a corrugation 42 is continuously installed on the upper portion of the primary heat insulating plate 10 to form the primary barrier 40. At this time, the stainless steel metal panel having the corrugation is formed on the primary barrier 40 by lap welding two or more stainless steel metal panels adjacent to each other with the insertion metal 12 for welding the primary heat insulating plate.

  Further, in the present invention, the corrugation 42 of the primary barrier is formed so as to be positioned at both side ends and the central portion of the primary heat insulating plate, and is positioned wider than the gap between the corrugations of the existing primary barrier.

  FIG. 16 is a flowchart showing an installation process according to the present invention. FIG. 17 is a diagram showing an installation process according to the present invention. FIG. 18 is a partial view showing an installation state according to the present invention. FIG. 19 is an exploded perspective view showing installation according to the present invention. FIG. 20 is a diagram showing an installation state according to the present invention. The present invention includes a primary installation stage in which a hull / insulation plate connecting part 80 and a fastening bolt for fastening means are installed in the hull, a secondary insulation board installation stage in which the secondary heat insulating board 20 is continuously installed in the hull / insulation board connection part, A fastening stage in which the secondary heat insulating plate 20 on one side continuously installed and the secondary heat insulating plate 20 adjacent thereto are simultaneously fixed by a fastening means, and a metal thin plate is formed on the upper portion of the secondary heat insulating plate 20 fixedly installed. A secondary barrier forming step in which a plurality of processed strakes are integrated by welding to form a secondary barrier, and an adhesive layer 60 is formed to apply an adhesive to the formed secondary barrier 50 to form an adhesive layer 60 A step of installing a primary heat insulating plate by using the adhesive layer 60 formed by coating, and a step of attaching a primary heat insulating plate, and a stainless steel metal having a corrugation 42 on the fixed primary heat insulating plate 10. Welding panels But consists of a primary barrier forming step of forming a primary barrier 10 so that the corrugations 42 are located at both side ends and the central portion of the primary insulation panels.

  In the primary installation stage, the hull / insulation plate connecting portion 80 and fastening bolts for fastening means are installed on the hull, and a plurality of fixed parts are fixed at regular intervals so that the heat insulation system of the cargo hold for loading LNG is fixedly connected to the hull. Bolts are installed on the hull, and a plurality of hull / heat insulation plate connecting portions 80 are installed to support and fix the heat insulation system to the hull 70 between the bolts. A level wedge 81 is installed at a portion close to the fixing bolt, and a plurality of mastics 82 are installed so as to be positioned between the level wedge.

  In the step of installing the secondary heat insulating plate, a plurality of secondary heat insulating plates are continuously installed such that the secondary heat insulating plate 20 is positioned above the level wedges located on both sides and the mastic located therebetween.

  In the fastening stage, a fixing bolt fixedly installed on the hull is inserted into a hole formed in the support body, and a fixing nut is fastened to the end of the fixing bolt penetrating the hole, and the fixing bolt is positioned on both sides by one support body. The lower plate of the secondary insulation plate is fixed and supported at the same time, or the fixing bolt fixedly installed on the hull is installed so as to penetrate the lower plate of the secondary insulation plate, and fixed to the fixing bolt that penetrates the corner of the lower plate A secondary heat insulating plate is fixedly supported by fastening a nut.

  The secondary barrier forming step includes a tongue-like member installation step in which a tongue-like member 25 is inserted and installed on the upper part of the secondary heat insulating plate 20, and a streak 54 between the installed tongue-like member 25 and the tongue-like member 25. And a welding step in which both sides of the strake 54 are welded to the tongue-like members.

  In the second barrier forming step, two or more adjacent strakes and the welding insert metal are welded together on the welding insert metal integrally formed on the upper plywood of the secondary insulation plate, or the secondary insulation is formed. The welding insert metal installed on the upper plywood of the plate can be welded to the striking contact with the inserted metal, and the side ends of adjacent strakes can be welded together.

  In addition, in order to increase the fastening strength between the secondary barrier 50 and the secondary heat insulating plate 20, the lower ply 54 constituting the secondary barrier and the upper plywood 21 of the secondary heat insulating plate 20 in contact with the strake 54 are bonded and fixed with an adhesive. can do.

  In the adhesive layer forming step, an adhesive is applied to the upper portion of the secondary barrier so as to form a space portion 61 where no adhesive layer is formed between the welded portion 55 and the end of the adhesive layer 60.

  The primary heat insulating plate installation step is to integrate the primary heat insulating plate and the secondary barrier by an adhesive layer, and by the adhesive layer 60 formed between the secondary barrier 50 and the primary heat insulating plate 10. The lower part of the primary heat insulating plate is bonded to the secondary barrier.

  In the primary barrier forming step, two or more adjacent stainless steel metal panels are welded on the welding metal insert 12 installed on the primary heat insulating plate 10 to form an integrated primary barrier.

  At this time, the primary barrier is formed such that the corrugation 42 formed to protrude is located at both side ends and the central portion of the primary heat insulating plate.

  According to the present invention configured as described above, the secondary heat insulating plate 20 is firmly fixed and supported on the hull by the fastening means, and the corners of the primary heat insulating plate 10 and the secondary heat insulating plate 20 are alternately changed. An integrated secondary barrier 50 is formed between the primary heat insulating plate 10 and the secondary heat insulating plate 20 by welding the strake 54 processed into a thin metal plate and the tongue-like member 25. At the same time, the primary heat insulating plate 10 is integrally bonded to the secondary barrier 50 by an adhesive, so that excellent assemblability and airtightness can be ensured. It is possible to greatly reduce the air required for sex inspection and the like.

  Further, in the present invention, as shown in FIGS. 21 to 30, the fastening of the secondary heat insulating plate and the hull is performed by arranging a fastening hole in the central portion of the secondary heat insulating plate and using the fastening means in the fastening hole. After fixing to the hull, the plug can be inserted into the fastening hole and finished, and the primary heat insulating plate can be installed so that the corners of the secondary heat insulating plate and the corners of the primary heat insulating plate are alternated. At the same time, portions not described in detail from the configuration described below are installed by using the technique described in FIGS.

  Hereinafter, the above configuration will be described in detail with reference to FIGS. FIG. 21 is a view showing an assembly configuration of a secondary heat insulating plate using a fastening hole. FIG. 22 is a view showing the arrangement of the fastening holes according to the present invention. FIG. 23 shows a plan view of the secondary heat insulating plate assembled using the fastening holes and a diagram predicting the degree of deformation. FIG. 24 is a diagram showing a positional relationship between the secondary heat insulating plate and the primary heat insulating plate assembled using the fastening holes.

  The secondary heat insulating plate 20 is fastened with fastening means 90 through a plurality of fastening holes 20a arranged in the center, the secondary heat insulating plate 20 is firmly fixed and supported by the hull 70, and the secondary barrier 50 is a thin metal plate. The members and the like processed in the above are integrally connected to the secondary heat insulating plate 20 by welding, and the corners of the primary heat insulating plate 10 are bonded and laminated so that the corners of the secondary heat insulating plate 20 alternate with each other.

  That is, a plurality of fastening holes 20a are formed at the center of a plurality of secondary heat insulating plates 20 that are continuously installed so as to be connected to the hull 70, and the secondary heat insulating plates are inserted and fastened by the fastening means 90 through the fastening holes 20a. After connecting 20 to the hull 70 and fixedly installed, a plug of a heat insulating material is inserted into the fastening hole and finished, and a member processed into a thin metal plate is integrated on the upper part of the secondary heat insulating plate 20 by welding to form a secondary barrier 50 is formed, primary heat insulating plates are alternately bonded and installed on the upper part of the secondary barrier 50.

  The fastening holes 20a are for inserting fastening means 90 such as bolts and nuts to fix the secondary heat insulating plate 20 to the hull 70, as shown in FIGS. 21 to 28 so as to penetrate the upper plywood 21 of the secondary heat insulating plate. A plurality of secondary heat insulating plates 20 are formed. The fastening hole 20a is preferably located within a range of 15% to 85% of both end portions of the secondary heat insulating plate when viewed in the width direction.

  In addition, the fastening hole 20a has a uniform bolt fastening pressure applied to the entire secondary heat insulating plate, improves the flatness of the secondary heat insulating plate, and minimizes the amount of deformation in the center of the secondary heat insulating plate. They are formed symmetrically or vertically symmetrical.

  As shown in FIG. 22, the fastening holes as described above have six fastening holes located symmetrically on the left and right sides when viewed in the width direction. It is formed one by one. That is, the fastening holes for fixing the secondary heat insulating plate to the hull in the conventional heat insulating system are located at both end portions of the secondary heat insulating plate in order to eliminate interference with the primary heat insulating plate as shown in FIG. However, the fastening holes according to the present invention are not located on both side portions of the secondary heat insulating plate, but are located between the 15% and 85% points on both ends when viewed in the width direction. The lower plate 22 of the secondary heat insulating plate has the same length as the heat insulating plate 23.

  In the present invention configured as described above, when the primary heat insulating plate is laminated on the upper portion of the secondary heat insulating plate, the corners of the secondary heat insulating plate are alternately alternated with the corners of the primary heat insulating plate as shown in FIG. The primary heat insulating plate is laminated and installed on the upper portion of the secondary heat insulating plate.

  FIG. 26 is a diagram illustrating a first arrangement state in which the fastening holes according to the present invention are deformed. Fastening holes are formed at the four corners of the secondary heat insulating plate, and three fastening holes are formed in the length direction so as to maintain an equal interval at the center, and a uniform bolt fastening pressure is applied.

  FIG. 27 is a view showing a second arrangement state in which the fastening holes according to the present invention are deformed. A fastening hole is formed in a rhombus shape symmetrically in the vertical direction on the secondary heat insulating plate.

  That is, according to the present invention, a fastening hole is formed at the center of the weight of the secondary heat insulating plate, and the fastening holes are formed and arranged in two rhombus shapes so as to include the formed fastening hole, and a uniform bolt fastening pressure acts. It has come to be.

  FIG. 28 is a view showing a third arrangement state in which the fastening holes according to the present invention are deformed. The fastening holes formed in the secondary heat insulating plate are the fastening holes arranged at regular intervals in the corner portions and the fastening holes located at the points where the length direction and width direction dividing lines such as the corner portion fastening holes intersect. It comes to form.

  That is, the fastening holes are formed on the left and right sides so as to be located at the same distance from the fastening hole formed in the central portion, and a uniform bolt fastening pressure is applied.

Hereinafter, the present invention for strengthening the fastening between the secondary heat insulating plate and the hull will be described in detail by way of examples.
(Example)
6 holes of 45 mm diameter are formed symmetrically on the left side and 3 on the right side at 25% and 75% in the width direction of the secondary heat insulating plate having a length of 3030 mm, a width of 990 mm, and a thickness of 170 mm. However, after forming each fastening hole to have a width direction interval of 495 mm and a length direction interval of 1010 mm, the amount of droop or distortion due to bolt-nut fastening using this was evaluated (at this time, The thickness of the upper plywood and the lower board is 9 mm).

FIG. 25 is a diagram showing the degree of distortion according to the embodiment of the present invention. It can be seen that the maximum strain amount is 0.048 mm in the length direction (Y direction), and the strain phenomenon occurs narrowly only at the end portion in the length direction.
(Comparative example)
Like the formation of the secondary heat insulation plate fastening holes of the conventional heat insulation system on the secondary heat insulation plate having a length of 3030 mm, a width of 990 mm, and a thickness of 170 mm, five fastening holes having a diameter of 45 mm are provided at the left end, and the right side. 5 pieces are formed symmetrically with respect to each other at the end portion, and after forming each fastening hole to have a width direction interval of 880 mm and a length direction interval of 730 mm, the amount of distortion due to bolt and nut fastening using this (At this time, the thickness of the lower plywood is 9 mm).

  FIG. 30 is a diagram showing the degree of distortion according to the comparative example of the present invention. It can be seen that the maximum strain amount is 0.050 mm in the length direction (Y direction), and the strain phenomenon occurs widely throughout the length direction.

  The present invention is not limited to the preferred embodiments described above, and various modifications may be made by anyone having ordinary knowledge in the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Of course, such modifications are within the scope of the appended claims.

DESCRIPTION OF SYMBOLS 10 Primary heat insulating board 11 Upper plywood 12 Insertion metal 13 for welding Heat insulating material 14 Crevice part 20 Secondary heat insulating board 21 Upper plywood 22 Lower board material 23 Heat insulating material 24 Tongue member insertion port 25 Tongue member 26 Insert heat insulating material 27 Crevice part 28 Insertion groove 29 Hole 29 'Coupling hole 20a Fastening hole 20b Fastening hole (conventional heat insulation system)
20c Insertion heat insulating material 40 Primary barrier 42 Corrugation 50, 50a, 50b Secondary barrier 54, 54a, 54b Metal sheet thin plate 55, 55b Welded portions 56, 56a, 56b, Welded parts 51a, 51b Welded insert metal 60 Adhesive Layer 61 Space 70 Hull 80 Hull / Heat Insulation Plate Connection 81 Level Wedge 82 Mastic 90 Fastening Means 90a Fastening Means 90b Showing the First Deformation State Fastening Means 90c Showing the Second Deformation State Fastening Means 90d Showing the Third Deformation State Fastening means 90e showing the fourth deformation state Fastening means 90f showing the fifth deformation state Fastening means 90g showing the sixth deformation state Fastening means 91, 91a, 91b, 91c, 91d, 91e, 91f, 91g showing the seventh deformation state Bolts 92, 92a, 92b, 92c, 92e, 92f Supports 93, 93a, 93b 93c, 93d, 93e, 93f, 93g Fixing nuts 94, 94a, 94b, 94c, 94f Hole 95b Combined body 92d First support body 94d Joint port 95b Combined body 95d Thread 96d Support plate 97d Insertion port 98d Second support body 95c , 95f blade part 96c, 96f first blade 97c, 97f second blade 100 primary heat insulation layer 200 secondary heat insulation layer

Claims (23)

A plurality of secondary heat insulating plates that should be continuously installed to be connected to the hull are connected to the hull by fastening means,
A secondary barrier is formed by integrating a strake processed into a metal thin plate on the upper part of the secondary heat insulating plate by welding,
After forming an adhesive layer on the upper part of the secondary barrier, the primary heat insulating plate is bonded and installed alternately with the secondary heat insulating plate by the adhesive layer,
A primary barrier is installed on top of the primary insulation board that is bonded and installed.
The primary heat insulating plate is formed by integrally forming an upper plywood made of wood or synthetic resin on an upper surface of a heat insulating material, and a liquefied natural gas storage container having a welded secondary barrier Insulation system.   The secondary barrier has a tongue-like member installed in one direction of the secondary heat insulating plate at a central portion of the upper surface of the secondary heat insulating plate, and is adjacent to the tongue member of the secondary heat insulating plate on the one side. 2. The heat insulation system for a liquefied natural gas storage container with a welded type secondary barrier according to claim 1, wherein both sides of the strake are welded to the tongue-like member of the other side secondary heat insulation plate to form an integral type. .   2. The secondary barrier wall according to claim 1, wherein an insertion metal for welding is installed on an upper portion of a secondary heat insulating plate, and two or more adjacent strakes are welded and integrated on the insertion metal for welding. A heat insulation system for a liquefied natural gas storage container comprising the welded type secondary barrier described in 1.   In the secondary barrier, one or more welding insertion metals are installed on a secondary heat insulating plate, and the welding insertion metal and one side of the striking contact with the welding metal are welded at the same time. The heat insulation system for a liquefied natural gas storage container having a welded type secondary barrier according to claim 1, wherein the corners of the strake adjacent to and on the other side are welded and integrated with each other.   The said secondary barrier is provided with the raw material selected from the metal raw material of an Invar alloy, stainless steel, and an aluminum alloy, The welding type | mold secondary barrier as described in any one of Claim 1 thru | or 4 characterized by the above-mentioned. Thermal insulation system for liquefied natural gas storage containers.   5. The heat insulation system for a liquefied natural gas storage container having a welded type secondary barrier according to claim 2, wherein the strakes are formed so that the welded portion is bent at both side ends so as to protrude upward.   An upper plywood whose upper surface is made of wood or synthetic resin and a lower plate whose lower surface is made of wood, synthetic resin or metal thin plate are integrally installed in the secondary heat insulating plate. A heat insulation system for a liquefied natural gas storage container, comprising the welded type secondary barrier according to Item 1.   8. The welding die according to claim 7, wherein the secondary heat insulating plate is formed with a tongue-shaped member insertion port in which a tongue-shaped member is installed in one direction of the secondary heat insulating plate at a central portion of the upper plywood. A heat insulation system for a liquefied natural gas storage container having a secondary barrier.   The heat insulation system for a liquefied natural gas storage container having a welded type secondary barrier according to claim 8, wherein the tongue-like member insertion port has a "T" or "L" shape.   The fastening means has a fixing bolt fixedly installed on the hull so as to be positioned between the secondary heat insulating plate on one side and the secondary heat insulating plate on the other side, and a hole into which the fixing bolt is inserted. A support body formed at equal intervals and having both lower sides in contact with the upper surface of the corner portion of the lower plate member of the secondary heat insulating plate, and fastened to the end of a fixing bolt protruding through the hole of the support body A heat insulation system for a liquefied natural gas storage container having a welded type secondary barrier according to claim 1, further comprising a fixing nut.   The fastening means includes a fixing bolt that is fixedly installed on the hull so as to be positioned between the secondary heat insulating plate on one side and the secondary heat insulating plate on the other side, and one bolt into which the fixing bolt is inserted. A support body provided with a hole and having both lower sides in contact with the upper surface of the corner portion of the lower plate member of the secondary heat insulating plate, and a fixing nut fastened to an end of a fixing bolt protruding through the hole of the support body; The heat insulation system for liquefied natural gas storage containers provided with the welding type | mold secondary barrier of Claim 1 characterized by the above-mentioned.   The fastening means includes a fixing bolt fixedly installed on the hull so as to be positioned between the secondary heat insulating plate on one side and the heat insulating plate adjacent to the other side, and one hole into which the fixing bolt is inserted. A support body in which both side ends are inserted into insertion grooves formed in the heat insulating material of the secondary heat insulating plate and the lower portions on both sides are in contact with the upper surface of the lower plate material of the secondary heat insulating plate; A heat insulation system for a liquefied natural gas storage container having a welded type secondary barrier according to claim 1, further comprising a fixing nut that is fastened to an end of a fixing bolt that penetrates through the fixing bolt.   The fastening means includes a fixing bolt installed in the hull, and a hole through which the fixing bolt is inserted and penetrated is formed at a corner portion of a lower plate member formed so as to protrude outward from the polyurethane heat insulating material. The heat insulation system for a liquefied natural gas storage container having a welded type secondary barrier according to claim 1, wherein a fixing nut is fastened to an end of a fixing bolt projecting to the base and a secondary heat insulating plate is fixed.   The insertion heat insulating material is installed between the secondary heat insulating plate and another secondary heat insulating plate adjacent to the secondary heat insulating plate so as to be positioned above the fastening means. , 12 and 13, a heat insulation system for a liquefied natural gas storage container, comprising the welded type secondary barrier.   The liquefied natural gas storage container having a welded type secondary barrier according to claim 1, wherein the adhesive layer has a width of about 60% or more and less than 99% of a width of both ends of the strake. Insulation system.   2. The heat insulation system for a liquefied natural gas storage container having a welded type secondary barrier according to claim 1, wherein the upper plywood of the primary heat insulation plate is integrally formed with a metal insertion metal for welding. .   2. The heat insulation system for a liquefied natural gas storage container having a welded secondary barrier according to claim 1, wherein the primary barrier is formed so that corrugations are positioned at both side ends and a central portion of the primary heat insulating plate. .   The partial surface of the lower part of the striking that constitutes the secondary barrier and the partial surface of the upper plywood of the secondary heat insulating plate that the strake is in contact with are bonded with an adhesive. A heat insulation system for a liquefied natural gas storage container, comprising the welded type secondary barrier according to claim 1.   2. The welding mold secondary according to claim 1, wherein a fastening means is inserted and fastened through a plurality of fastening holes disposed in a central portion of the heat insulating plate, and the secondary heat insulating plate is firmly fixed and supported on the hull. Insulation system for liquefied natural gas storage container with barrier.   The fastening holes formed in the secondary heat insulating plate are arranged so as to be equidistant from each other within a range of 15% to 85% of both ends of the secondary heat insulating plate symmetrically to the left and right. Item 20. A heat insulation system for a liquefied natural gas storage container, comprising the welded type secondary barrier according to item 19.   The fastening holes formed in the secondary heat insulating plate are characterized in that fastening holes arranged at corner portions and fastening holes arranged at equal intervals in the central length direction of the secondary heat insulating plate are arranged. A heat insulation system for a liquefied natural gas storage container, comprising the welded type secondary barrier according to claim 19. A primary installation stage in which a hull / insulation plate connecting part and a fastening bolt for fastening means are installed on the hull;
A secondary heat insulating plate installation stage in which a secondary heat insulating plate is continuously installed at the connecting part of the hull / heat insulating plate;
A fastening stage in which the secondary heat insulating plate on one side continuously installed and the secondary heat insulating plate on the other side adjacent thereto are fixed simultaneously by fastening means,
A secondary barrier forming step for forming a secondary barrier by integrating a plurality of strakes processed into a metal thin plate on the upper part of the fixedly installed secondary heat insulating plate by welding;
An adhesive layer forming step of applying an adhesive to the formed secondary barrier to form an adhesive layer;
A primary heat insulating plate installation step of bonding and installing a primary heat insulating plate using the coated and formed adhesive layer, and a step of forming a primary barrier having a corrugation on the upper side of the bonded heat insulating plate A heat insulation construction method for a liquefied natural gas storage container comprising a welded secondary barrier.   In the step of forming the secondary barrier, a tongue-like member is inserted and installed on the upper part of the fixed secondary heat insulating plate, and a streak is inserted between the installed tongue-like member and the tongue-like member. 23. The heat insulation construction method for a liquefied natural gas storage container provided with a welded type secondary barrier according to claim 22, wherein each of the tongue members is welded.