KR20200023749A - Insulation panel and insulation system including the same - Google Patents

Abstract

An insulation panel according to one embodiment of the present invention includes: a plurality of unit panels (U) disposed at regular intervals; and one or more connecting members (300, 301, 302, 303, 304) inserted into an end unit of the unit panel (U) exposed to a gap (G) to connect the neighboring unit panels (U). Therefore, the present invention does not reduce the insulating performance thereof while minimizing damage to a membrane.

Description

INSULATION PANEL AND INSULATION SYSTEM INCLUDING THE SAME}

The present invention relates to an insulation panel and an insulation system including the same, and more particularly, to an insulation panel for a liquefied gas storage tank and an insulation system including the same, and more particularly to an insulation panel for a membrane liquefied gas storage tank and the same. It relates to an insulation system.

In general, natural gas is a fossil fuel containing methane as a main component and a small amount of ethane, propane, etc., and has recently been spotlighted as a low pollution energy source in various technical fields. .

Natural gas is transported in gaseous form via onshore or offshore gas piping, or to remote consumers while stored in LNG carriers in the form of liquefied liquefied natural gas. Liquefied natural gas is obtained by cooling natural gas to cryogenic temperature of -163 ° C, and its volume is reduced to about one hundredth of that of natural gas in gas state, so it is very suitable for long distance transportation by sea.

The liquefied natural gas carrier is provided with a storage tank for storing and storing the liquefied natural gas liquefied by cooling the natural gas. Since the boiling point of liquefied natural gas is about -162 ° C at atmospheric pressure, the storage tank of liquefied natural gas is made of ultra-low temperature materials such as aluminum steel, stainless steel, invar, etc. to store and store liquefied natural gas safely. It is designed to be resistant to thermal stress and heat shrinkage and to prevent thermal intrusion.

A liquefied natural gas carrier for liquefied natural gas to be discharged to land demand by loading the liquefied natural gas, and liquefied natural gas after arriving at the land demand by navigating the sea to reclaim the stored liquefied natural gas into natural gas. Liquefied natural gas storage tanks are also installed in floating offshore structures such as LNG RVs that are unloaded, and recently, LNG FPSOs and LNG FSRUs.

These storage tanks are classified into an independent tank type and a membrane type according to whether a load of cargo directly acts on the insulation.

In general, the membrane type storage tank is a stacked structure of a primary membrane in direct contact with liquefied natural gas, a primary insulation layer including a primary insulation panel, a secondary insulation layer including a secondary membrane and a secondary insulation panel. The secondary heat insulation layer is a structure fixed to the hull. The primary membrane is a part directly in contact with the liquefied natural gas stored in the storage tank, and may be made of a low temperature brittle metal such as aluminum alloy, invar, 9% nickel steel, and stainless steel, and the secondary membrane is made of aluminum alloy, invar, and 9%. It may be made of a material such as nickel steel, stainless steel, and triplex. In addition, the primary insulation panel and the secondary insulation panel may be used, such as polyurethane foam having excellent insulation performance.

At this time, the primary insulation panel and the secondary insulation panel have a significant difference between the temperature at the time of initial installation and the temperature when the liquefied natural gas is stored in the liquefied natural gas storage tank. Will receive. These stresses can result in deformation of the membrane and the like, which is one of the major burdens on the membrane.

In addition, in the case of a membrane-type storage tank installed directly on the hull, the vertical step difference between the insulation panels is caused by the hull deformation, etc. This is one of the other factors causing the deformation of the membrane.

In order to prevent such a problem, a bridge may be installed between the insulation panels to minimize deformation, but in this case, there is a problem that the shrinkage deformation of the insulation panel is prevented and the allowable stress of the insulation panel is exceeded.

In addition, slits or grooves can be machined on the top or bottom of the insulation panel to avoid exceeding the permissible stress, but this results in the formation of voids and consequent increase in convection to reduce insulation performance. Have

The present invention has been made to solve the problems of the prior art, an object of the present invention is to provide a thermal insulation panel and a thermal insulation system comprising the same while minimizing damage to the membrane by deformation due to stress, the thermal insulation performance is not reduced. There is.

Insulating panel according to an embodiment of the present invention is a plurality of unit panels (U) arranged with a predetermined gap, the unit panel (inserted adjacent to the end of the unit panel (U) exposed to the gap (G) ( U) one or more connecting members (300, 301, 302, 303, 304) for connecting.

In addition, the connecting member is characterized in that the plate-shaped long formed in the longitudinal direction of the gap (G).

In addition, the connecting member is a first connecting portion 31 is formed along the end of the unit panel (U) in which the connecting member is inserted, the first connecting portion perpendicularly to the first connecting portion 31 and is located in the gap It characterized in that it comprises two connecting portion (32).

In addition, the connection member is connected to the second connecting portion 32 perpendicular to, characterized in that it further comprises a third connecting portion 33 facing each other with the first connecting portion 31.

In addition, the lower surface of the third connecting portion 33 is in contact with the upper surface or the lower surface of the unit panel (U).

In addition, the first connecting portion 31 and the second connecting portion 32 is characterized in that cross cross.

In addition, the connecting member is located on an imaginary center line that bisects the unit panel U in the thickness direction.

In addition, the connecting member may be positioned closer to the upper surface or the lower surface of the unit panel U than to an imaginary center line bisecting the unit panel U in the thickness direction.

The connecting member may be symmetrically positioned with respect to an imaginary center line that bisects the unit panel U in the thickness direction.

Insulation system including an insulation panel according to an embodiment of the present invention is a thermal insulation system for liquefied gas storage for storing the liquefied gas, the secondary insulation layer 130 is installed on the inner wall of the hull and includes a secondary insulation panel 13 ); A secondary membrane 120 formed on the secondary heat insulation layer 130; A primary insulation layer 110 formed on the secondary membrane 120 and including a primary insulation panel 12; And a primary membrane 100 formed on the primary insulation layer 110. It includes, and the at least one of the secondary heat insulating panel 13 and the primary heat insulating panel 12 is characterized in that it comprises a heat insulating panel according to an embodiment of the present invention.

In addition, the secondary insulation panel 13 or the primary insulation panel 12 is characterized in that it comprises a polyurethane foam.

In addition, the secondary heat insulation layer 130 includes a lower protection plate, the secondary insulation panel 13 and an upper protection plate, wherein the lower protection plate and the upper protection plate is characterized in that it comprises a plywood.

In addition, the primary insulation layer 110 includes a lower protection plate, the primary insulation panel 12 and the upper protection plate, the lower protection plate and the upper protection plate is characterized in that it comprises a plywood.

In addition, the primary membrane 100 is characterized in that it has a pleat portion 8 protruding from the primary heat insulating layer (110).

In addition, a protective plate for reinforcing the strength of the pleats 8 is formed inside the pleats 8.

When the insulation panel is formed as in one embodiment of the present invention, the heat shrinkage in the horizontal direction is free and the burden on the membrane can be minimized by controlling the movement in the vertical direction.

1 is a schematic perspective view of a unit panel for a heat insulation panel according to an embodiment of the present invention.
FIG. 2 is an enlarged view of a connection part of the insulation panel of FIG. 1.
3 is a view for explaining the movement of the thermal insulation panel according to an embodiment of the present invention.
4 is a view showing a connection of the insulating panel according to another embodiment of the present invention.
5 is a schematic perspective view of an insulation panel according to an embodiment of the present invention.
6 is a view showing a connection of the insulating panel according to another embodiment of the present invention.
7 is a schematic perspective view of a connection member of a heat insulating panel according to another embodiment of the present invention.
8 is a schematic perspective view of a thermal insulation panel according to another embodiment of the present invention.
9 is a schematic cross-sectional view of an insulation system including an insulation panel according to an embodiment of the present invention.

As the present invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description.

However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In describing the drawings, similar reference numerals are used for similar elements.

And / or the term “and” include any combination of a plurality of related description items or a plurality of related description items.

When a component is said to be “connected” or “connected” to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may exist in the middle. Should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms “comprise” or “have” are intended to indicate that there is a feature, number, step, action, component part, or a combination thereof described in the specification, and that one or more other features It should be understood that it does not exclude in advance the possibility of the presence or addition of numbers, steps, operations, components, parts or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art, and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

1 is a schematic perspective view of a unit panel for a thermal insulation panel according to an embodiment of the present invention, Figure 2 is an enlarged view showing the connection of the thermal insulation panel of FIG.

1 and 2, the thermal insulation panel 200 according to an embodiment of the present invention includes a plurality of unit panels U. Referring to FIG.

As shown in FIGS. 1 and 2, each unit panel U is in a plate shape, and is formed along a groove H and a first direction X formed along a first direction X of one end portion. It includes a protrusion (P) formed at the other end. The grooves H and the protrusions P of the neighboring unit panels U are coupled to engage with each other.

In this case, each of the grooves H and the protrusions P has a pair of sidewalls parallel to the top and bottom surfaces of the unit panel U, and the sidewalls of the grooves H and the sidewalls of the protrusions P are in contact with each other. Can be.

The depth L1 of the groove H may be equal to or greater than the height L3 of the protrusion P, and the upper surface of the protrusion P may be spaced apart from the bottom surface of the groove H.

3 is a view for explaining the movement of the thermal insulation panel according to an embodiment of the present invention.

Referring to FIG. 3, when shrinkage occurs in the unit panel U by heat, heat shrinkage occurs in the grooves H and the protrusions P, and a space is formed therebetween. The horizontal movement of the unit panel is freed by the space, while the movement in the vertical direction can be limited. As such, when the movement in the horizontal direction is free, excessive generation of stress due to thermal contraction can be prevented. In addition, since the vertical movement is limited, the step difference between neighboring unit panels U may be reduced.

4 is a view showing a connection of the insulating panel according to another embodiment of the present invention.

As shown in (a) of FIG. 4, the grooves H and the protrusions P may be formed in plural along the second direction Y, which is the thickness direction of the unit panel U, and may be arranged at regular intervals. . In this case, the depths L1 of the plurality of grooves H may be identically formed.

In addition, as shown in FIGS. 4B and 4C, the depth L1 of the plurality of grooves H and the protrusions P, and the width L2 of the grooves H and the protrusions P are shown. May be formed differently.

In the unit panel U illustrated in FIGS. 1 and 4, the groove H and the protrusion P may be disposed to be symmetrical with respect to an imaginary center line that bisects the thickness of the unit panel U. FIG.

The above unit panels can be connected through the connecting member to further reduce the vertical displacement.

5 is a schematic perspective view of an insulation panel according to an embodiment of the present invention.

As shown in FIG. 5, each unit panel U may be disposed in a plate shape with a predetermined gap G. In this case, two neighboring unit panels U may be connected to the connection member 300.

The connecting member 300 is inserted into an end portion of the unit panel U exposed to the gap G to connect two neighboring unit panels U. The connection member 300 may be inserted along the end of the unit panel U in a long plate shape in one direction.

When the connecting member 300 is inserted as in the present invention, even if heat shrinkage occurs in the neighboring unit panel U, deformation can be minimized. That is, when thermal contraction occurs, the unit panel U may be displaced not only in a horizontal direction but also in a vertical direction (thickness direction of the unit panel), and different displacements may occur in neighboring unit panels U. FIG.

At this time, the connecting member 300 is inserted into the neighboring unit panel (U) to limit the movement in the vertical direction, the neighboring unit panel (U) is connected to the connecting member 300, so that the two unit panels (U) Make the displacement the same. Therefore, the connecting member 300 may be made of a material that is more rigid than the unit panel U, for example, metal or reinforced plastic, and when the connecting member 300 divides the thickness of the unit panel U in half, The upper and / or lower portions of the unit panel U may be installed respectively. In addition, the connection member 300 may be installed in a virtual center line that bisects the thickness of the unit panel U, or may be symmetrically installed with respect to the virtual center line.

6 is a view showing a connection of the insulating panel according to another embodiment of the present invention, Figure 7 is a schematic perspective view of a connecting member of the insulating panel according to another embodiment of the present invention.

As shown in FIG. 6, the connecting member 301 may include a first connecting portion 31 inserted into an end of a neighboring unit panel U and a second connecting portion 32 vertically connected to the first connecting portion 31. have. At this time, the second connecting portion 32 is located in the gap G.

In addition, as illustrated in FIG. 7A, the connection member 302 may include a first connection portion 31 and a third connection portion 33 facing each other with respect to the second connection portion 32. In this case, the first connecting portion 31 is inserted into an end portion of the unit panel U exposed to the gap G (see FIG. 6), and the lower surface of the third connecting portion 33 is an upper surface of the unit panel U or It may be installed to contact the lower surface (see FIG. 9). Of course, as shown in FIG. 6, the first connection part 31 and the third connection part 33 may be inserted into the unit panel U, and thus may not be exposed out of the unit panel U.

In addition, as shown in FIG. 7B, the connection member 303 may include at least one fourth connection portion 34 between the first connection portion 31 and the third connection portion 33. The fourth connection part 34 may be installed to face the first connection part 31 and the third connection part 33, and may be inserted into an end of the unit panel U to connect neighboring unit panels U to each other.

In addition, as shown in (c) of FIG. 7, the connection member 304 may have a cross structure by crossing the first connection portion 31 and the second connection portion 32.

8 is a schematic perspective view of a thermal insulation panel according to another embodiment of the present invention.

As shown in FIG. 8, the heat insulation panel 210 according to an embodiment of the present invention may be connected to form a plurality of unit panels U in a matrix.

In this case, as shown in FIGS. 1 and 2, the unit panel U connected in the row direction, that is, the third direction Z may be coupled to each other by the groove H and the protrusion P being engaged with each other. In addition, the unit panels U connected in the column direction, that is, the first direction X may be connected to each other through the connection member 302, as shown in FIGS. 6 and 7.

The upper and / or lower portion of the unit panel U may further include a protective plate (see numerals 11 and 14 of FIG. 9), and the grooves H and the protrusions may be disposed after the unit panel U is disposed at regular intervals on the protective plate. Connect so that (P) is engaged. Then, the connecting member 302 is inserted between the unit panel U adjacent in the direction perpendicular to the direction in which the groove H and the protrusion P extend. The connecting member 302 may be inserted into the groove H formed at the end of the unit panel U in a sliding manner.

The above insulation panel can be used in the insulation system for liquefied cargo storage tank, which will be described with reference to FIG.

9 is a schematic cross-sectional view of an insulation system including an insulation panel according to an embodiment of the present invention.

As shown in FIG. 9, an insulation system including an insulation panel according to an embodiment of the present invention is installed inside the hull 1, and in a sequence far from the inside of the hull 1, the primary membrane 100. The primary insulation layer 110, the secondary membrane 120, and the secondary insulation layer 130 are sequentially stacked to seal and protect the interior of the liquefied cargo storage tank. At this time, the secondary heat insulating layer 130 may be fixed to the hull with an adhesive 3 such as epoxy mastic.

Since the primary membrane 100 is in direct contact with the liquefied natural gas in the cryogenic state, it may be made of a metal material resistant to low temperature brittleness such as aluminum alloy, invar, 9% nickel steel, stainless steel, etc. to cope with stress change. have. The central portion may have a plurality of corrugations 8 raised in the center to facilitate expansion and contraction even with repeated temperature changes and load changes of the storage liquid. Inside the pleats 8 may be filled with a protective plate (not shown) to reinforce the strength of the pleats 8.

The primary membrane 100 is sealed welded on the primary insulating layer 110, and may be, for example, carried out by a lapping welding or a seam welding method.

The primary heat insulation layer 110 may include an upper protection plate 11 and a primary insulation panel 12, and may include a lower protection plate (not shown). The upper protection plate 11 and the lower protection plate (not shown) may be made of wood such as plywood, and the primary insulation panel 12 may be made of a material such as polyurethane foam having excellent thermal insulation. .

In the primary insulation panel 12, a plurality of unit panels U may be connected in a matrix as illustrated in FIG. 8. The neighboring unit panel U may be connected to the groove H and the protrusion P. In addition, end portions of the unit panel U where the grooves H and the protrusions P are not formed may be connected through the connection member 302. In this case, the connection member 302 may be installed on the upper and / or lower portions of the primary insulation panel 12, respectively. In addition, the connecting member 302 may be installed at a virtual center line bisecting the thickness of the unit panel U, or may be installed symmetrically with respect to the virtual center line.

Polyurethane foam used as the primary insulation panel 12 may be deformed by shrinkage and expansion in the cryogenic environment, but connects the end of the unit panel to the groove (H) and the protrusion (P), as in the present invention, By connecting through the connection member 302 it is possible to minimize the deformation due to shrinkage, expansion.

The secondary membrane 120 may comprise one of fiber reinforced composite materials such as stainless steel, aluminum, brass, zinc and glass fibers, or may be a triplex membrane. For example, it may be formed by attaching a glass-fiber composite between a pair of aluminum foils facing each other.

The secondary insulation layer 130 may include a lower protection plate 14 and a secondary insulation panel 13, and may include an upper protection plate (not shown). The lower guard plate 14 and the upper guard plate (not shown) may be made of wood such as plywood.

In addition, the secondary insulation panel 13 may be connected to form a plurality of unit panels in a matrix as shown in FIG. The neighboring unit panel U may be connected to the groove H and the protrusion P. In addition, end portions of the unit panel U where the grooves H and the protrusions P are not formed may be connected through the connection member 302. In this case, the connection member 302 may be installed at the upper and / or lower portions of the secondary insulation panel 13, respectively. In addition, as described above, the connecting member 302 may be installed on an imaginary center line that bisects the thickness of the unit panel U, or symmetrically with respect to the imaginary center line.

According to the above configuration, even if shrinkage occurs in the unit panel due to heat, movement in the horizontal direction is free and stress can be prevented from being excessively deformed, and the deformation in the vertical direction is minimized, The displacement of the unit panel can be made the same.

As such, when the displacement of two neighboring unit panels is changed to the same, there is no step difference caused by the displacement between the two unit panels, thereby preventing the primary membrane or the secondary membrane located at the top from being deformed and damaged by the step difference. have.

In addition, in the present invention, it is possible to block the movement of air to the gap by installing the connecting member to cross the gap. Therefore, it is possible to minimize the occurrence of convection phenomenon or increase the convection phenomenon to increase the thermal insulation.

The present invention is not limited to the above embodiments, and various modifications or changes may be made without departing from the technical scope of the present invention, which will be apparent to those of ordinary skill in the art. It is.

100: primary membrane 110: primary insulating layer
120: secondary membrane 130: secondary insulating layer

Claims (15)

A plurality of unit panels (U) disposed with a predetermined gap,
One or more connecting members 300, 301, 302, 303, and 304 which are inserted into an end of the unit panel U exposed to the gap G and connect the neighboring unit panels U.
Thermal insulation panel comprising a. The method of claim 1,
The connecting member is a heat insulation panel, characterized in that the plate is formed long along the longitudinal direction of the gap (G). The method of claim 1,
The connection member may include a first connection part 31 formed along an end of the unit panel U into which the connection member is inserted,
A second connecting portion 32 perpendicular to the first connecting portion 31 and positioned in the gap;
Thermal insulation panel comprising a. The method of claim 3, wherein
The connecting member is vertically connected to the second connecting portion 32, and the third connecting portion 33 facing each other with the first connecting portion 31.
Insulation panel, characterized in that it further comprises. The method of claim 4, wherein
The lower surface of the third connecting portion 33 is in contact with the upper surface or the lower surface of the unit panel (U). The method of claim 3, wherein
Insulation panel, characterized in that the first connecting portion (31) and the second connecting portion (32) cross cross. The method of claim 1,
The connecting member is insulated panel, characterized in that located in the imaginary center line bisecting the unit panel (U) in the thickness direction. The method of claim 1,
The connecting member is positioned to be closer to the upper surface or the lower surface of the unit panel (U) than an imaginary center line bisecting the unit panel (U) in the thickness direction. The method of claim 1,
The connecting member is insulated panel, characterized in that located symmetrically with respect to the imaginary center line bisecting the unit panel (U) in the thickness direction. An insulation system for liquefied gas storage for storing liquefied gas,
A secondary heat insulation layer 130 installed on the inner wall of the hull and including a secondary heat insulation panel 13;
A secondary membrane 120 formed on the secondary heat insulation layer 130;
A primary insulation layer 110 formed on the secondary membrane 120 and including a primary insulation panel 12; And
A primary membrane 100 formed on the primary thermal insulation layer 110;
Including,
At least one of said secondary insulation panel (13) and said primary insulation panel (12) comprises an insulation panel according to any one of the preceding claims. The method of claim 10,
Said secondary insulation panel (13) or primary insulation panel (12) is characterized in that it comprises a polyurethane foam. The method of claim 10,
The secondary heat insulation layer 130 includes a lower protection plate, the secondary insulation panel 13 and an upper protection plate,
And said lower guard plate and said upper guard plate comprise plywood. The method of claim 10,
The primary insulation layer 110 includes a lower protection plate, the primary insulation panel 12 and the upper protection plate,
And said lower guard plate and said upper guard plate comprise plywood. The method of claim 10,
The primary membrane (100) is characterized in that it has a corrugated portion (8) of the shape protruding from the primary heat insulating layer (110). The method of claim 14,
Insulation system, characterized in that the inner side of the wrinkle portion (8) is formed with a protective plate to reinforce the strength of the wrinkle portion (8).

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