KR101412489B1 - Cargo for liquefied gas carrier ship - Google Patents

Abstract

A cargo hold of a liquefied gas transportation vessel comprising a plurality of insulating panels is disclosed. A cargo hold of a liquefied gas carrier according to an embodiment of the present invention includes a main wall enclosing an accommodating space in which liquefied gas is received, an upper adiabatic panel structure surrounding the main wall, a lower adiabatic panel structure surrounding the upper adiabatic panel structure, And an outer wall surrounding the lower adiabatic panel structure, and an auxiliary barrier located on the lower adiabatic panel structure between the upper adiabatic panel structure and the lower adiabatic panel structure, and an impact absorbing layer located on the auxiliary barrier, , The shock absorbing layer, the auxiliary barrier, and the lower adiabatic panel structure are joined in the z-axis direction by the coupling unit.

Description

{CARGO FOR LIQUEFIED GAS CARRIER SHIP}

The present invention relates to a cargo hold of a liquefied gas transportation vessel, and more particularly to a cargo hold of a liquefied gas transportation vessel including an impact absorbing layer.

Liquefied gas refers to a colorless transparent cryogenic liquid that reduces the volume of methane-based natural gas to -162 ° C and reduces its volume by one-sixth.

As such liquefied gas is used as an energy source, an efficient transportation method that can transport a large amount from the production base to the place of purchase of the demand site has been examined in order to utilize this gas as energy. As a part of this effort, A liquefied gas transport vessel capable of being transported by sea was developed.

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

That is, since the liquefied gas has a vapor pressure higher than atmospheric pressure and has a boiling temperature of approximately -162 ° C, in order to safely store and store such a liquefied gas, the cargo window storing the liquefied gas is a material which can withstand extremely low temperatures, It should be made of aluminum steel, stainless steel, 35% nickel steel, etc. It should be designed with a unique insulation panel structure which is resistant to thermal stress and heat shrinkage and prevents heat intrusion.

The cargo hold of the liquefied gas carrier is subjected to a sloshing shock by the liquefied gas stored therein. Sloshing is a phenomenon in which liquid substances contained in a cargo hold flow when a ship or floating structure moves in various sea conditions. If there is a certain amount of liquid in the cargo hold, the cargo hold insulation panel will be severely impacted by sloshing due to the flow of liquid, which is called sloshing shock.

The above-mentioned sloshing phenomenon is necessarily caused by the dynamic movement of the ship during the operation of the ship, and the cargo hold is to be designed to have sufficient strength to withstand the load by sloshing.

Korean Patent Laid-Open Publication No. 2010-0124552 discloses a cargo hold of a liquefied natural gas carrier.

[Patent Literature]

Korean Unexamined Patent Publication No. 2010-0124552 (2010. 11. 29. Announcement)

An embodiment of the present invention is to provide a cargo hold of a liquefied gas transportation vessel capable of reducing an impact load between an upper insulating panel structure and an auxiliary barrier.

It is also desirable to use the coupling unit to join the lower and upper insulation panel structures without bonding the impact absorbing layer and the upper or lower secondary panels or the impact absorbing layer to the secondary barrier.

In addition, it is desired to solve the thermal stress of the auxiliary barrier by using the coupling unit.

According to an aspect of the present invention there is provided a method of manufacturing a lower insulation panel structure, comprising the steps of: forming a cavity wall surrounding a containment space in which liquefied gas is contained, an upper insulation panel structure surrounding the kitchen wall, a lower insulation panel structure surrounding the upper insulation panel structure, A cargo hold of a liquefied gas transportation vessel comprising an outer wall surrounding a structure, comprising: an auxiliary barrier positioned on the lower insulation panel structure between the upper and the lower insulation panel structures; Wherein the upper insulating panel structure, the impact absorbing layer, the auxiliary barrier, and the lower adiabatic panel structure are provided with a cargo hold of a liquefied gas transportation vessel which is coupled in the z-axis direction by a coupling unit.

Further, the auxiliary barrier may be welded to the coupling unit, and the coupling unit may be provided with a cargo hold of a liquefied gas transportation vessel capable of sliding motion in the vertical direction of the z-axis.

The auxiliary barrier rib and the shock absorbing layer may be positioned between spaces maintained at a predetermined distance by the spacers. The auxiliary barrier rib and the shock absorbing layer may be disposed between the upper and lower insulation panel structures. A cargo hold of a liquefied gas transportation vessel capable of sliding motion by thermal shrinkage or thermal expansion of the barrier can be provided.

Further, the spacer may be fixed to the coupling unit, and the coupling unit may be provided with a cargo hold of a liquefied gas transportation vessel capable of sliding movement in the vertical direction of the z-axis.

The coupling unit may include a block inserted into a depression formed in the lower adiabatic panel structure; A fixing piece for supporting a part of an upper surface of the block and engaging with the lower adiabatic panel structure; And a coupling member for fixing the block to the upper insulation panel structure, wherein the block is provided with a cargo hold of a liquefied gas transportation vessel that is spaced apart from the fixed piece or the lower insulation panel structure in a direction perpendicular to the z axis have.

Further, the block may be provided with a cargo hold of a liquefied gas transportation vessel welded to the auxiliary barrier.

The upper insulating panel structure may include a reinforcing panel on a surface contacting the impact absorbing layer, and the engaging member may include: a bolt connected to the block; A washer located on the upper surface of the reinforcing panel; And a nut fastened to the bolt and applying pressure to the washer.

The lower insulation panel structure may include a reinforcing panel on a side contacting the auxiliary barrier, the depression may be formed in the reinforcing panel, and the holding piece may be provided with a cargo hold of a liquefied gas transportation vessel coupled to the reinforcing panel .

Further, the coupling unit may include: a fixing block for fixedly coupling the upper insulating panel structure and the impact absorbing layer; A movable block coupled with the fixed block in a z-axis direction and spaced apart in a direction perpendicular to the z-axis, the movable block engaging with the auxiliary barrier and slidable in a direction perpendicular to the z-axis; And a fixing piece coupled to the moving block in the z-axis direction and spaced apart in the vertical direction of the z-axis and fixedly coupled to the lower heat-insulating panel structure.

The fixed block includes:

And a coupling portion which has a support surface for supporting a lower surface of the impact absorbing layer and is coupled with the nut through the impact absorbing layer and a lower portion of the upper heat insulating panel structure body, And a supporting piece interposed between the supporting surfaces of the fixed block.

In addition, the moving block may be provided with a cargo hold of a liquefied gas transportation vessel welded to the auxiliary barrier.

The cargo hold of the liquefied gas transportation vessel according to the embodiment of the present invention can protect the cargo hold from impact by sloshing or the like.

In addition, thermal stress of the impact absorbing layer can be solved by joining the lower heat insulating panel structure and the upper heat insulating panel structure without bonding the impact absorbing layer, the upper auxiliary panel or the impact absorbing layer and the auxiliary wall.

Further, by using the coupling unit, the thermal insulation of the impact absorbing layer or the auxiliary barrier can be relieved, and the lower insulating panel structure and the upper insulating panel structure can be firmly coupled.

1 is a cross-sectional view showing a cargo hold of a liquefied gas transportation vessel according to an embodiment of the present invention.
2 is a cross-sectional view of a coupling unit according to an embodiment of the present invention installed on an insulating panel assembly.
3 is an exploded perspective view of a coupling unit according to an embodiment of the present invention.
FIG. 4 is a perspective view showing a coupling unit according to an embodiment of the present invention moving by thermal deformation of an auxiliary barrier. FIG.
5 is a cross-sectional view of a coupling unit according to another embodiment of the present invention installed in an insulating panel assembly.
6 is an exploded perspective view of a coupling unit according to another embodiment of the present invention.

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

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

1 is a cross-sectional view showing a cargo hold of a liquefied gas transportation vessel according to an embodiment of the present invention.

A cargo hold of a liquefied gas carrier according to an embodiment of the present invention includes a main wall 10 surrounding an accommodation space in which liquefied gas is received, an insulation panel assembly 20 surrounding the main wall 10, 20 which surround the outer wall 30.

The heat insulating panel structure located in the direction (downward direction or -z direction) where the outer wall 30 is positioned with respect to the auxiliary barrier 400 is referred to as a lower heat insulating panel structure 21, (Upward or + z direction) in which the heat sink 10 is located is referred to as an upper heat insulating panel structure 22.

The lower insulating panel structure 21 may be coupled to the outer wall 30 by a mastic or the like and may include a lower auxiliary panel 200 fixed to the lower insulating panel 100 and the + can do. The upper insulating panel structure 22 includes an upper auxiliary panel 600 positioned on the + z direction surface of the auxiliary barrier 400 and an upper insulating panel 700 fixed on the + z direction surface of the upper auxiliary panel 600 can do. Generally, the heat insulating panel is made of a lightweight material such as a polyurethane foam which is excellent in heat insulation performance.

An auxiliary barrier 400 is provided between the lower insulation panel 100 near the outer wall 30 and the upper insulation panel 700 near the kitchen wall 10 in case the kitchen wall 10 allows outside entry Located.

The auxiliary panels 200 and 600 may be inserted between the heat insulating panels 100 and 700 and the auxiliary barrier 400 to reduce thermal stress and improve airtightness. That is, the lower sub-panel 200 is fixed to the lower heat-insulating panel 100, and the upper sub-panel 600 is fixed to the upper heat- The auxiliary panel may be usually plywood or the like, and the auxiliary barrier 400 may be made of SUS or the like.

The cargo hold of a liquefied gas carrier according to an embodiment of the present invention may include an impact absorbing layer 500. The shock absorbing layer 500 may be a melamine foam. The melamine foam is an open type foam based on a melamine resin based on an amino resin system and can be suitably used as the impact absorbing layer 500 to be inserted into the heat insulating panel assembly 20 because it can absorb impact and has excellent heat insulating performance. However, the embodiment of the present invention does not limit the material and the properties of the impact absorbing layer 500, and if the insulation panel assembly 20 can be protected from a sloshing impact caused by the liquefied gas accommodated in the cargo hold, And the impact absorbing layer 500 according to the present invention.

The impact absorbing layer 500 may be laminated by adhering to an adiabatic panel or an auxiliary panel. In this case, the stacking position of the impact absorbing layer 500 is preferably located between the upper sub-panel 600 and the auxiliary barrier 400. The auxiliary barrier 400 inserted between the lower sub-panel 200 and the upper sub-panel 600 may also be joined to the sub-panels 200 and 600 on both sides by adhesion or the like.

As described above, the heat insulating panel assembly 20 according to the embodiment of the present invention is formed by stacking layers of different materials. At this time, as a method of lamination bonding, there is a method of using an adhesive or a mechanical bonding. The adhesive bonding is advantageous in that it is easy to construct and the manufacturing cost is low.

However, when different materials are bonded by bonding, in a liquefied gas holding window, such as a liquefied gas, which carries a material having a considerable variation in temperature, heat shrinkage varies depending on materials to be laminated, . This thermal stress can weaken or break the bond site, which can be a threat to the airtightness as well as the structural stability of the insulation panel assembly 20.

The heat insulating panel assembly 20 according to the embodiment of the present invention may not bond between the auxiliary panels 200 and 600, the auxiliary barrier 400, or the impact absorbing layer 500. Mechanical coupling is performed using the coupling units 23 and 24 in order to join the lower and upper thermal insulation panel structures 21 and 22 without adhering thereto.

The coupling units 23 and 24 are for laminating the shock absorbing layer 500 and the auxiliary barrier 400 therebetween while coupling the lower insulating panel structure 21 and the upper insulating panel structure 22 together. The coupling units 23 and 24 are laminated in the order of the lower and upper thermal insulation panel structures 21, the auxiliary barrier 400, the impact absorption layer 500 and the upper insulation panel structure 22, The auxiliary barrier 400, the auxiliary barrier 400 and the impact absorbing layer 500, and the impact absorbing layer 500 and the upper insulating panel structure 22 without bonding.

The coupling units 23 and 24 can be coupled to each other without adhering the auxiliary barrier 400 and the impact absorbing layer 500 between the lower insulating panel structure 21 and the upper insulating panel structure 22 regardless of the shape thereof Functions will be included in the combining unit 23, 24 according to an embodiment of the present invention.

2 is a cross-sectional view of the coupling unit 23 according to the embodiment of the present invention installed in the insulating panel assembly 20, and Fig. 3 is an exploded perspective view of the coupling unit 23. Fig.

The coupling unit 23 according to an embodiment of the present invention may include a coupling unit 300 to allow the auxiliary barrier 400 to move vertically to the z axis by thermal contraction or thermal expansion while maintaining the airtightness of the auxiliary barrier 400. [ And a fixing piece 320. [0034]

The block 300 is inserted into the first depression 210 formed on the + z direction surface (upper surface) of the lower sub panel 200 and is coupled to the auxiliary barrier 400 by welding or the like (see A in FIG. 2) do. The reason of being joined by the method of welding or the like is to keep airtightness by being continuously connected with the auxiliary barrier 400. It is preferable that the first depressed portion 210 does not pass through the lower sub-panel 200. The bottom insulating panel 100 may be exposed when the coupling A between the auxiliary barrier 400 and the block 300 is penetrated, which means that the airtightness is weakened.

When the lower insulation panel structure 21 does not include the lower sub-panel 200, the first sub-recess 210 is formed in the lower sub-panel 200, Or may be formed directly on the lower insulating panel 100.

When the block 300 is inserted into the first depression 210, the block 300 is spaced apart from the first depression 210 in the direction perpendicular to the z-axis (or x-y plane direction). When the auxiliary barrier 400 is thermally shrunk or thermally expanded through the spaced space, the block 300 can slide in the direction of contraction or expansion of the auxiliary barrier 400. The contraction range of the auxiliary barrier 400 is calculated and the width of the first depression 210 is determined so that the block 300 and the lower sub-panel 200 are spaced apart in the x-y plane direction by the resultant value.

The first depressed portion 210 and the block 300 may have a cylindrical shape or a circular cross-sectional shape perpendicular to the z-axis. That is, the diameter of the first depression 210 in the x-y plane direction is larger than the diameter of the auxiliary barrier 400 in the xy plane direction or larger than the diameter of the auxiliary barrier 400 in the xy plane direction. In the case of a circular shape, it is possible to slide evenly along the shrinkage direction and it is easy to manufacture.

The height of the central part 302 and the peripheral part 303 of the block 300 may be different from each other. The central portion 302 is a portion where the auxiliary barriers 400 are engaged and the peripheral portion 303 prevents the block 300 from deviating in the + z direction by the fixing pieces 320 coupled with the lower sub- .

The lower sub-panel 200 can create a second depression 220 around the first depression 210. [ The second depression 220 includes a first depression 210 at the center and a wider recess in the direction perpendicular to the z axis than the first depression 210. Also, the depth may be shallower than the first depression 210. Of course, the shape of the second indentation 220 can be changed according to the shape of the fixing piece 320. When the second depressed portion 220 has the same depth as the first depressed portion 210, the fixing piece 320 may be formed with a locking protrusion that covers the peripheral portion 303 of the block 300.

The block 300 is inserted into the first depression 210 and then the fixing piece 320 is inserted into the second depression 220 and coupled with the lower sub panel 200. At this time, the fixing can be done by bolts or rivets 322 and by adhesion. Hereinafter, bonding and adhesion by bolts or rivets 322 are collectively referred to as bonding.

The auxiliary barrier 400, the block 300, and the fixing piece 320 may be made of the same material. Therefore, it may be paradoxical to connect the lower sub-panel 200 and the fixing member 320, as compared with the case where the sub-barrier 400 and the lower sub-panel 200 are not bonded. However, since the area of the joint between the fixing member 320 and the lower sub-panel 200 is very small, the degree of deformation due to thermal stress is small and bonding is possible. In contrast, since the auxiliary barrier 400 and the lower sub-panel 200 are in contact with the front surface of the lower adiabatic panel structure 21, the generation of thermal stress becomes very large when these surfaces are bonded. It is also conceivable to combine with bolts or rivets 322 for a more rigid connection.

The shape of the fixing piece 320 may be a shape of a hollow ring. The center portion 302 of the block 300 is located in the hollow portion and the peripheral portion 303 of the block 300 is located below the ring surface. That is, the peripheral portion 303 of the block 300 is positioned between the fixing piece 320 and the lower sub-panel 200. Therefore, the movement of the block 300 in the + z direction is restricted by the fixed fixing piece 320.

The fixing piece 320 and the peripheral portion 303 of the block 300 may be in contact with each other or spaced apart from each other by a predetermined distance. However, since the block 300 may be shaken in the z-axis direction as much as the spacing, the structural stability of the heat insulating panel assembly 20 may be deteriorated. Conversely, if the fixing part 320 and the peripheral part 303 of the block 300 are in close contact with each other, the free movement of the block 300 can be restricted.

The central portion 302 of the block 300 has a height corresponding to the + z direction of the lower sub-panel 200 and the peripheral portion 303 has a height corresponding to the second recess And has a height corresponding to the depth of the portion 220. In this case, the corresponding height does not mean the same height.

Generally, the plywood used as the material of the lower sub-panel 200 has a greater degree of shrinkage in the z-axis direction at the cryogenic temperature as compared with the metal that can be used as the material of the block 300 and the fixing piece 320. The height of the fixing piece 320 is lower than the height of the central portion 302 of the lower sub-panel 200 in the + z direction and lower than the height corresponding to the depth of the second depressed portion 220, The height of the lower surface 303 becomes lower. The height of the blocks 300 and the fixing pieces 320 becomes higher relative to the auxiliary barrier 400 and the impact absorbing layer 500 to cause thermal stress or to weaken the bond between the lower insulating panel structure 21 and the upper insulating panel structure 22.

The coupling member 800 is a member for coupling the block 300 and the upper sub-panel 600 in the z-axis direction. The block 300 is joined to the auxiliary barrier 400 by welding or the like and is coupled to the lower sub-panel 200 in the z-axis direction by the fixing piece 320. Accordingly, the coupling member 800 joins the lower sub-panel 200 and the upper sub-panel 600 in the z-axis direction via the block 300, and as a result, the lower and upper insulation panel structures 21, (22).

The coupling member 800 is connected to the block 300 and connects the upper sub-panel 600 and the block 300 by tightening the nut 830 through the upper sub-panel 600. Associating with the block 300 includes coupling with the block 300 as a separate member as well as being formed integrally with the block 300.

The mating member 800 according to an embodiment of the present invention may include a stud bolt 810 coupled to the block 300. A hole may be formed at the center of the block 300 and a threaded hole 301 may be formed at the outer surface of the hole. A stud bolt 810 can be inserted into the threaded hole 301 through the upper and lower auxiliary panels 600 and 400. The washer 820 and the nut 830 can be fastened to the + z-axis surface of the upper sub-panel 600. At this time, it is also possible to form a groove in the upper sub-panel 600 for insertion of the washer 820.

The washer 820 and the nut 830 are fastened to the upper and lower sub-panels 600 and 600. However, when the upper sub-panel 600 is not interposed, As well as the engagement member 800, as shown in FIG.

The coupling unit 23 according to an embodiment of the present invention may include a spacer 900 positioned between the nut 830 and the block 300 to maintain a predetermined distance therebetween.

The spacing between the upper and lower sub panels 600 and 300 becomes narrower as the nut 830 is tightened and the auxiliary barriers 400 interposed between the block 300 and the upper sub- And the impact absorbing layer 500 are subjected to the pressure by the tightening of the nut 830. Therefore, the auxiliary barrier 400 receives a pressure in close contact with the lower sub-panel 200 located at the lower portion or the upper portion of the impact absorbing layer 500, and the vertical movement of the auxiliary barrier 400 is disturbed to the z-axis. This obstructs the object of the present invention to solve the thermal stress due to heat shrinkage or thermal expansion of the auxiliary barrier 400. The auxiliary barrier 400 is maintained at a constant distance between the block 300 and the upper auxiliary panel 600, It is preferable to allow the free movement of the block 300.

Spacer 900 may be positioned between washer 820 and block 300 for this purpose. As a result, the spacer 900 is positioned between the nut 830 and the block 300 and serves to maintain a constant distance between the two members, and can be included in the embodiment of the present invention regardless of its shape . In accordance with one embodiment of the present invention, a spacer 900 having a hollow cylindrical shape is shown.

A method of joining the heat insulating panel assembly 20 according to an embodiment of the present invention will be described. The block 300 is inserted into the first depression 210 formed in the lower sub-panel 200 after the lower adiabatic panel structure 21 is installed on the outer wall 30. The fixing member 320 is inserted into the second depression 220 formed in the lower subpanel 200 and the fixing member 320 is coupled with the lower subpanel 200 using a rivet 322 or the like. By this combination, the block 300 is coupled with the lower sub-panel 200 in the z-axis direction and is not separated.

Next, the auxiliary barrier 400 is positioned on the lower sub-panel 200 and the hole corresponding to the block 300 formed on the auxiliary barrier 400 is aligned with the position of the block 300. Then, the auxiliary barrier 400 and the block 300 are joined by welding or the like. Since the airtightness of the auxiliary barrier 400 is determined by the coupling with the block 300, it is necessary to work carefully with welding or the like. The auxiliary barriers 400 are coupled to the lower sub-panel 200 in the z-axis direction and are not separated from each other and the block 300 and the lower sub-panel 200, the block 300, The auxiliary barrier 400 and the block 300 are movable by a distance in the z-axis vertical direction.

An impact absorbing layer 500 is laminated on the auxiliary barrier 400. At this time, the impact absorbing layer 500 may be a panel having a hole corresponding to the block 300 as in the case of the auxiliary barrier 400, or may be a split panel Lt; / RTI >

Subsequently, the upper sub-panel 600 is positioned on the auxiliary barrier 400 and the hole corresponding to the block 300 formed on the upper sub-panel 600 is aligned with the position of the block 300. The stud bolt 810 is then coupled to the threaded bore 301 of the hole formed in the central portion 302 of the block 300. At this time, the assembling order of the stud bolts 810 may be before the installation of the auxiliary barrier 400, and the order of work is not limited.

The spacer 900 and the washer 820 are then inserted around the stud bolt 810. Finally, the nut 830 is fastened to complete the coupling of the coupling member 800. The spacer 900 maintains the distance between the nut 830 and the block 300 even if the nut 830 is tightened tightly so that the block 300 slides along the thermal deformation of the auxiliary barrier 400 It can be easy.

Finally, the upper insulating panel 700 is laminated to complete the upper insulating panel structure 22, and the main wall is laminated. The upper insulating panel 700 may be coupled with the coupling unit 23 while being adhesively coupled to the upper auxiliary panel 600 and may be bonded after the coupling of the upper auxiliary panel 600.

The fastening furnace block 300 and the upper insulating panel structure 22 of the joining member 800 are coupled in the z-axis direction and consequently the lower insulating panel structure 21, the auxiliary barrier 400 and the upper insulating panel structure 22 are completed by the coupling unit 23 in the z-axis direction.

4 is a perspective view showing a state in which the coupling unit 23 according to an embodiment of the present invention is moved by thermal deformation of the auxiliary barrier 400. FIG.

The fixing part 320 or the block 300 has a space between the first depression 210 and the second depression 220 in a direction perpendicular to the z axis and the height is also equal to the width of the peripheral part of the block 300 The central portion 302 may be lower than the bottom surface of the second sub-panel 220, and the middle portion 302 may be lower than the + z-plane of the sub- Although the auxiliary barrier 400 is omitted in FIG. 4, since the auxiliary barrier 400 is heat-shrunk in the xy plane direction, the block 300 coupled with the auxiliary barrier 400 by welding or the like moves along the auxiliary barrier 400 Respectively.

Although the first depression 210 is formed in the lower sub-panel 200 located on the + z-direction of the lower insulation panel 100 in the embodiment of the present invention, the lower sub-panel 200 is deleted And a first depression (210) is formed in the lower adiabatic panel (100).

In an embodiment of the present invention, the first and second depressions 210 and 220 are formed in the lower insulation panel 100 or the lower sub-panel 200, A first depressed portion (not shown) and a second depressed portion (not shown) are formed on the upper insulating panel 700 or the upper auxiliary panel 600, (300) and the coupling member (800) are combined.

The shape of the coupling unit 23 is not limited to one embodiment but includes other embodiments.

5 is a cross-sectional view of the coupling unit 24 according to another embodiment of the present invention installed in the insulating panel assembly 20, and FIG. 6 is an exploded perspective view of the coupling unit 24. As shown in FIG.

The coupling unit 24 according to another embodiment of the present invention maintains the airtightness of the auxiliary barrier 400 while the lower and the upper thermal barrier structures 21 and 22 are coupled and the auxiliary barrier 400 is heat- And includes a moving block 310 and a fixing piece 340 to allow movement in a direction perpendicular to the z-axis by thermal expansion.

The moving block 310 and the fixing pieces 340 are inserted into the depressions 230 generated in the + z direction (upper surface) of the lower sub panel 200. The moving block 310 is coupled to the auxiliary barrier 400 by welding or the like (see FIG. 5A). The reason of being joined by the method of welding or the like is to keep airtightness by being continuously connected with the auxiliary barrier 400. It is preferable that the depressed portion 230 does not pass through the lower sub-panel 200. The bottom insulating panel 100 may be exposed when the coupling A between the auxiliary barrier 400 and the block 300 is penetrated, which means that the airtightness is weakened.

When the lower insulation panel structure 21 does not include the lower sub-panel 200, the depression 230 is formed in the lower sub-panel 200, 100, as shown in FIG.

When the movable block 310 is inserted into the depression 230, the movable block 310 is spaced apart from the depression 230 or the fixed piece 340 in the direction perpendicular to the z-axis (or x-y plane direction). When the auxiliary barrier 400 thermally shrinks or thermally expands through the spaced space, the moving block 310 can slide in the contraction or expansion direction of the auxiliary barrier 400. The width of the depressed portion 230 is calculated such that the movable block 310 and the lower sub panel 200 or the fixing pieces 340 inserted therein are spaced apart in the xy plane direction by the calculated value, And the size of the fixing piece 340 is determined.

The depressed portion 230 and the moving block 310 may have a cylindrical shape or a circular shape in cross section perpendicular to the z axis. In the case of a circular shape, it is possible to slide evenly along the shrinkage direction and it is easy to manufacture.

The fixing piece 340 is a member inserted to restrict movement of the moving block 310 inserted in the depression 230 in the z-axis direction. The moving block 310 may include a first locking part 312 on the outer surface thereof and the fixing piece 340 may include a first locking step 341 for covering the upper surface of the first locking part 312. The first engaging portion 312 and the first engaging jaw 341 may be in contact with each other or may be spaced apart from each other by a predetermined distance. However, since the movable block 310 may be shaken in the z-axis direction by a space that is just spaced apart, the structural stability of the heat insulating panel assembly 20 may be deteriorated. On the contrary, if the first locking part 312 and the first locking step 341 are brought into close contact with each other, the free movement of the moving block 310 can be restricted.

The fixing piece 340 is engaged with the lower sub-panel 200. At this time, the fixing can be done by bolts or rivets 342 and by adhesion. Hereinafter, bonding and adhesion by bolts or rivets 342 are collectively referred to as bonding.

The fixed piece 340 and the moving block 310 are spaced from each other in a direction perpendicular to the z-axis. This is to allow the moving block 310 to move in a direction perpendicular to the z-axis by contraction of the auxiliary barrier 400 or the like. At this time, the spacing distance should be selected to the extent that the first latching part 312 and the first latching latch 341 are not separated from each other.

Generally, the plywood used as the material of the lower sub-panel 200 has a greater degree of shrinkage in the z-axis direction at the cryogenic temperature as compared with the metal that can be used as the material of the moving block 310 and the fixing piece 340. Therefore, the height of the moving block 310 and the fixing piece 340 may be smaller than the depth of the depressed portion 230 in anticipation of the degree of contraction. The lower sub-panel 200 made of plywood shrinks in the z-axis direction to relatively increase the height of the moving block 310 and the fixing piece 340, So as to prevent thermal stress from occurring or to weaken the bond between the lower insulating panel structure 21 and the upper insulating panel structure 22.

The coupling unit 24 according to another embodiment of the present invention may include the fixing block 330. [ The fixing block 330 is a member for joining the moving block 310 and the upper insulating panel structure 22 in the z direction. The moving block 310 is coupled to the auxiliary barrier 400 by welding or the like and is coupled so as not to be separated in the z-axis direction from the lower auxiliary panel 200 by the fixing piece 340. Accordingly, the fixing block 330 joins the lower sub-panel 200 and the upper sub-panel 600 in the z-axis direction through the moving block 310, and as a result, the lower insulating panel structure 21 and the upper heat- Thereby joining the structure 22.

The moving block 310 may include a first locking portion 312 and a second locking protrusion 314. The first locking part 312 is inserted into the lower surface of the first locking step 341 of the fixing piece 340 to restrict movement in the z axis direction and the second locking step 314 is a part of the fixing block 330 Is a portion that covers the upper surface of the second latching portion 331 and restricts movement of the fixing block 330 in the z-axis direction.

The moving block 310 may include a body portion 311 having a first latching portion 312 and a coupling portion 313 having a second latching protrusion 314. The body portion 311 and the engaging portion 313 can be separated from each other to insert the fixing block 330. The body portion 311 includes a lower surface capable of supporting the fixing block 330. The upper surface of the body portion 311 is engaged with the auxiliary barrier 400. At this time, the body 311 should not include a hole or the like to secure the airtightness of the auxiliary barrier 400. That is, the upper and lower portions of the auxiliary barrier 400 must be blocked from the portion coupled with the auxiliary barrier 400.

The engaging portion 313 is a portion that is inserted after the fixing block 330 is inserted into the body portion 311 and is engaged to restrict the movement of the engaging portion 313 in the z-axis direction. And the engagement of the body portion 311 and the engaging portion 313 includes a screw connection. In addition, it is possible to combine welds, but screwing is an advantage when considering the convenience of work and the working time.

The fixing block 330 may include a second latching portion 331, a supporting surface 332 for supporting the lower surface of the upper insulating panel structure 22, and a fastening portion 333 fastened through the sub-panel .

The second latching portion 331 is inserted into a lower portion of the second latching jaw 314 of the moving block 310 to limit the z-axis movement. The support surface 332 does not substantially support the load of the lower adiabatic panel structure 21. Only the support surface 332 abuts the lower portion of the lower adiabatic panel structure 21 to allow the fixing block 330 to firmly engage the lower adiabatic panel structure 21. [

The fastening portion 333 may be a separate member that engages with the fixing block 330 or may be a portion. The engaging unit 24 according to another embodiment of the present invention includes a fastening portion 333 formed integrally with the fastening block 330. [ The fastening portion 333 may include a threaded portion 334 having an upper thread. That is, the fastening portion 333 penetrates through the sub-panel and is firmly coupled to the washer 820 and the nut 830. The fixing block 330 is engaged with the upper insulating panel structure 22 and the second locking portion 331 of the fixing block 330 is moved in the z-axis direction by the second locking step 314 of the moving block 310 Movement is limited.

The coupling unit 24 according to another embodiment of the present invention includes a fastening portion 333 which is a separate member from the fastening block 330. [ The fastening portion 333 may be a stud bolt 810 coupled to the fastening block 330. A hole may be formed in the center of the fixing block 330 and a threaded hole 301 may be formed on the outer surface of the hole. A stud bolt 810 can be inserted into the threaded hole 301 through the upper and lower auxiliary panels 600 and 400. The washer 820 and the nut 830 can be fastened to the + z-axis surface of the upper sub-panel 600.

The washer 820 and the nut 830 are fastened to the upper and lower sub-panels 600 and 600. However, when the upper sub-panel 600 is not interposed, As well as the fastening portion 333 of the fastening block 330.

The coupling unit 24 according to another embodiment of the present invention may include a support piece 910. When the nut 830 is tightened, the upper sub-panel 600 is compressed by the supporting surface 332 of the fixing block 330. At this time, a support piece 910 may be interposed between the upper sub-panel 600 and the support surface 332 to disperse the force by the support surface 332. The support piece 910 may be ring-shaped, like the washer 820.

A method of joining the heat insulating panel assembly 20 according to another embodiment of the present invention will be described. The lower insulating panel structure 21 is installed on the outer wall 30 and then the moving block 310 is inserted into the depressed portion 230 formed in the lower subpanel 200. The fixing member 340 is inserted into the outer periphery of the depression 230 formed in the lower sub panel 200 and the first fixing portion 312 of the moving block 310 is fixed to the upper surface of the first fixing portion 312 of the first fixing panel 340, So that the latching jaw 341 can be covered. Thereafter, the fixing piece 340 and the lower sub-panel 200 are coupled using a rivet 342 or the like. In this connection, the moving block 310 is coupled with the lower sub-panel 200 in the z-axis direction and is not separated.

The auxiliary barrier 400 is positioned on the lower sub-panel 200 and the hole corresponding to the movable block 310 formed on the auxiliary barrier 400 is aligned with the position of the moving block 310. Thereafter, the auxiliary barrier 400 and the moving block 310 are joined by welding or the like. At this time, the airtightness of the auxiliary barrier 400 is determined by the coupling with the moving block 310, so it is necessary to work carefully with welding or the like. The auxiliary barriers 400 are coupled to the lower sub-panel 200 in the z-axis direction and are not separated from each other and the movable block 310 and the lower sub-panel 200 or the moving block 310 and the fixing pieces The auxiliary barrier 400 and the block 300 are movable by a distance in the z-axis vertical direction between the auxiliary barrier 400 and the block 300. [

The combination of the movable block 310 and the fixed block 330 is not related to the installation of the movable block 310 or the installation thereof. The fixing block 330 is inserted into the body 311 of the moving block 310 and then the engaging portion 313 of the moving block 310 is inserted into the body 310. [ So that the fixed block 330 and the moving block 310 are coupled in the z-axis direction so as not to be separated.

A step of positioning the supporting piece 910 on the supporting surface 332 of the fixing block 330 while the fixing block 330 is installed on the moving block 310 may be inserted.

An impact absorbing layer 500 is laminated on the auxiliary barrier 400. At this time, the impact absorbing layer 500 may be a panel having a hole corresponding to the block 300, like the auxiliary barrier 400, or may be a split panel having a fastening position of the fastening unit 24 Lt; / RTI >

The upper sub-panel 600 may then be placed on the secondary barrier 400 and the washer 820 may be inserted into the fastening portion 333. Finally, the nut 830 is fastened to complete the coupling of the coupling member 800.

Finally, the upper insulating panel 700 is laminated to complete the upper insulating panel structure 22, and the main wall is laminated. The fixing block 330 and the upper heat insulating panel structure 22 are coupled in the z-axis direction by fastening the fastening portion 333 of the fixing block 330 and the nut 830 and consequently the lower heat insulating panel structure 21, The auxiliary barrier 400 and the upper insulating panel structure 22 are completed in the z-axis direction by the coupling unit 24.

In another embodiment of the present invention, the depression 230 is formed in the lower sub-panel 200 located on the + z direction of the lower insulation panel 100. However, the lower sub-panel 200 may be omitted, And a depression 230 is formed in the panel 100. [

In another embodiment of the present invention, the depressions 230 are formed in the lower insulating panel 100 or the lower sub-panel 200, so that the relationship between the moving block 310 and the fixing block 330 A depression (not shown) is formed in the upper insulating panel 700 or the upper sub-panel 600 so that the moving block 310 and the fixing block 330 are coupled to each other.

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

10: Kitchen wall, 20: Insulation panel assembly,
21: lower insulation panel structure, 22: upper insulation panel structure,
23, 24: coupling unit, 30: outer wall,
31: mastic, 100: bottom insulating panel,
200: lower sub-panel, 210: first depression,
220: second depression, 230: depression,
300: block, 301: thread,
302: central portion, 303: peripheral portion,
310: moving block, 311: body part,
312: first latching portion, 313: engaging portion,
314: second stopping jaw, 320,340: fastening piece,
341: first stopping jaw, 322, 342: rivet,
330: fixed block 331: second engaging part,
332: support surface, 333: fastening portion,
334: threaded portion, 400: secondary barrier,
500: shock absorbing layer, 600: upper auxiliary panel,
700: Upper insulation panel, 800: Coupling member,
810: Stud bolt, 820: Washer,
830: nut, 900: spacer,
910:

Claims (11)

A main wall enclosing an accommodating space in which liquefied gas is contained, an upper insulating panel structure surrounding the kitchen wall, a lower adiabatic panel structure surrounding the upper adiabatic panel structure, and an outer wall surrounding the lower adiabatic panel structure In a cargo hold of a liquefied gas carrier,
Between the upper and lower thermal insulation panel structures,
An auxiliary barrier positioned on the lower insulating panel structure,
And an impact absorbing layer located on the auxiliary barrier,
Wherein the upper insulating panel structure, the shock absorbing layer, the auxiliary barrier, and the lower heat insulating panel structure are joined by a coupling unit,
Wherein the auxiliary barrier is welded to the coupling unit,
Wherein the coupling unit is capable of sliding movement in a direction perpendicular to the direction in which the kitchen wall, the upper and lower thermal insulation panel structures are stacked (hereinafter referred to as "stacking direction"). delete The method according to claim 1,
And a spacer that maintains a predetermined distance between the upper and lower thermal insulation panel structures,
Wherein the auxiliary barrier and the impact absorbing layer are positioned between spaces maintained at a predetermined distance by the spacer, and the auxiliary barrier is capable of sliding motion by heat shrinkage or thermal expansion. The method of claim 3,
Wherein the spacer is fixed to the coupling unit,
Wherein the coupling unit is capable of sliding movement in the vertical direction in the stacking direction. The method according to claim 1,
The coupling unit includes:
A block inserted into a depression formed in the lower adiabatic panel structure;
A fixing piece for supporting a part of an upper surface of the block and engaging with the lower adiabatic panel structure; And
And an engaging member for fixing the block to the upper adiabatic panel structure,
Wherein the block is spaced apart from the fixed piece or the lower heat-insulating panel structure in a direction perpendicular to the stacking direction. 6. The method of claim 5,
Said block being welded to said secondary barrier. 6. The method of claim 5,
Wherein the upper insulating panel structure includes a reinforcing panel on a surface contacting the impact absorbing layer,
The coupling member
A bolt connected to the block;
A washer located on the upper surface of the reinforcing panel; And
And a nut which is fastened to the bolt and applies pressure to the washer. 6. The method of claim 5,
Wherein the lower insulating panel structure includes a reinforcing panel on a side contacting the auxiliary barrier,
Wherein the depression is formed in the reinforcing panel,
And the fixing piece is coupled to the reinforcing panel. The method according to claim 1,
The coupling unit includes:
A fixing block for fixedly coupling the upper insulating panel structure and the impact absorbing layer;
A movable block coupled with the fixed block in a stacking direction and spaced apart in a direction perpendicular to the stacking direction and slidable in a direction perpendicular to the stacking direction in association with the auxiliary wall; And
And a fixing piece coupled to the moving block in a stacking direction and spaced apart in the vertical direction of the stacking direction and fixedly coupled to the lower heat insulating panel structure. 10. The method of claim 9,
The fixed block includes:
And a support surface for supporting the lower surface of the impact absorbing layer,
And a fastening part penetrating the impact absorbing layer and a lower portion of the upper heat insulating panel structure and fastened to the nut,
Wherein the coupling unit further comprises a support piece interposed between a lower surface of the impact absorbing layer and a support surface of the fixed block. 10. The method of claim 9,
Wherein the moving block is welded to the secondary barrier.

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