KR102561816B1 - Insulation panel and insulation system including the same - Google Patents

Abstract

Insulation panel according to an embodiment of the present invention is a plurality of unit panels (U) arranged with a predetermined gap, inserted into the end of the unit panel (U) exposed to the gap (G) adjacent to the unit panel ( It is characterized in that it comprises one or more connecting members (300, 301, 302, 303, 304) connecting U).

Description

Insulation panel and insulation system including the same {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 specifically, to an insulation panel for a liquefied gas storage tank and an insulation system including the same, and more specifically to an insulation panel for a membrane liquefied gas storage tank and including the same It is about an insulation system that does.

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-emission energy source in various technical fields. .

Natural gas is transported in a gaseous state through onshore or offshore gas pipelines, or stored in an LNG carrier in the form of liquefied liquefied natural gas and transported to a distant consumer. Liquefied natural gas is obtained by cooling natural gas to a cryogenic temperature of -163 ° C, and its volume is reduced to about 1/600 of that of natural gas in a gaseous state, so it is very suitable for long-distance transportation through sea.

A liquefied natural gas carrier is equipped with a storage tank capable of storing and storing liquefied natural gas obtained by cooling and liquefying natural gas. Since the boiling point of liquefied natural gas is about -162℃ at atmospheric pressure, the storage tank of liquefied natural gas must be made of materials that can withstand cryogenic temperatures such as aluminum steel, stainless steel, and invar to safely store and store liquefied natural gas. It is designed with a structure that is strong against thermal stress and heat shrinkage and can prevent heat intrusion.

A liquefied natural gas carrier for loading and unloading liquefied natural gas to a place of demand on land by navigating the sea with liquefied natural gas, navigating the sea with liquefied natural gas and arriving at the place of demand on land, regasifying the stored liquefied natural gas into natural gas Liquefied natural gas storage tanks are also installed in floating offshore structures such as unloading LNG RVs, recently LNG FPSOs, and LNG FSRUs.

These storage tanks are divided into an independent tank type and a membrane type depending on whether the load of the cargo directly acts on the insulation material.

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

At this time, the primary insulation panel and the secondary insulation panel have a severe 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, so stress due to thermal contraction when the liquefied natural gas is stored. will receive As a result, this stress may cause deformation of the membrane and is one of the elements that impose a heavy burden on the membrane.

In addition, in the case of a membrane type storage tank installed directly on a hull, deformation of vertical steps between insulation panels occurs due to deformation of the hull, etc., which is another factor that causes deformation of the membrane as a result.

In order to prevent this problem, it is possible to minimize deformation by installing a bridge between the insulation panels, but in this case, there is a problem in that the shrinkage deformation of the insulation panels is prevented and exceeds the allowable stress of the insulation panels.

In addition, a slit or groove may be processed on the top or bottom of the insulation panel in order to prevent exceeding the allowable stress, but this creates an empty space and consequently increases the convection phenomenon, thereby reducing the problem of lowering the insulation performance. have

The present invention has been made to solve the problems of the prior art, and an object of the present invention is to provide an insulation panel that minimizes damage to the membrane due to deformation due to stress and does not reduce insulation performance, and an insulation system including the same. is to do

Insulation panel according to an embodiment of the present invention is a plurality of unit panels (U) arranged with a predetermined gap, inserted into the end of the unit panel (U) exposed to the gap (G) adjacent to the unit panel ( It is characterized in that it comprises one or more connecting members (300, 301, 302, 303, 304) connecting U).

In addition, the connecting member is characterized in that it is formed in a plate shape elongated along the longitudinal direction of the gap (G).

In addition, the connecting member is vertically connected to the first connecting portion 31 formed long along the end of the unit panel U into which the connecting member is inserted, and the first connecting portion 31 is positioned in the gap. 2 characterized in that it comprises a connecting portion (32).

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

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

In addition, the first connection part 31 and the second connection part 32 are characterized in that they cross each other crosswise.

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

In addition, the connecting member is characterized in that located closer to the upper surface or the lower surface of the unit panel (U) than an imaginary center line that bisects the unit panel (U) in the thickness direction.

In addition, the connecting member is characterized in that it is located symmetrically with respect to the imaginary center line that bisects the unit panel (U) in the thickness direction.

A thermal insulation system including a thermal insulation panel according to an embodiment of the present invention is a thermal insulation system for storing liquefied gas, which is installed on the inner wall of a hull and includes a secondary thermal insulation panel 13. The secondary thermal insulation layer 130 ); a secondary membrane 120 formed on the secondary thermal insulation layer 130; A primary thermal insulation layer 110 formed on the secondary membrane 120 and including a primary thermal insulation panel 12; and a primary membrane 100 formed on the primary thermal insulation layer 110; Including, at least one of the secondary insulation panel 13 and the primary insulation panel 12 is characterized in that it comprises a insulation 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 insulating layer 130 includes a lower protective plate, the secondary insulating panel 13 and an upper protective plate, and the lower protective plate and the upper protective plate are characterized in that they include plywood.

In addition, the primary heat insulating layer 110 includes a lower protective plate, the primary insulating panel 12 and an upper protective plate, and the lower protective plate and the upper protective plate are characterized in that they include plywood.

In addition, the primary membrane 100 is characterized by having wrinkles 8 protruding from the primary thermal insulation layer 110 .

In addition, it is characterized in that a protective plate for reinforcing the strength of the wrinkles (8) is formed on the inside of the wrinkles (8).

Forming the heat insulation panel as in one embodiment of the present invention, heat shrinkage in the horizontal direction is free, and the load applied to 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 insulating panel according to an embodiment of the present invention.
Figure 2 is an enlarged view of the connecting portion of the insulation panel of Figure 1;
Figure 3 is a view for explaining the movement of the insulation panel according to an embodiment of the present invention.
4 is a view showing a connection portion of a heat insulating panel according to another embodiment of the present invention.
5 is a schematic perspective view of an insulating panel according to an embodiment of the present invention.
6 is a view showing a connection portion of a heat insulating panel according to another embodiment of the present invention.
7 is a schematic perspective view of a connecting member of an insulating panel according to another embodiment of the present invention.
8 is a schematic perspective view of an insulating 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.

Since the present invention can make various changes and have various embodiments, specific embodiments are illustrated in the drawings and described in detail.

However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. Like reference numerals have been used for like elements throughout the description of each figure.

When the terms and/or appear, this includes a combination of a plurality of related items or any one of a plurality of related items.

It is understood that when an element is referred to as being “connected” or “connected” to another element, it may be directly connected or connected to the other element, but other elements may exist in the middle. It should be. On the other hand, when a component is referred to as “directly connected” or “directly connected” to another component, it should be understood that no other component exists in the middle.

Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as “comprise” or “having” are intended to designate that there is a feature, number, step, operation, component part, or combination thereof described in the specification, but one or more other features or It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

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 to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in this application, it should not be interpreted in an ideal or excessively formal meaning. don't

1 is a schematic perspective view of a unit panel for a heat insulating panel according to an embodiment of the present invention, and FIG. 2 is an enlarged view of a connecting portion of the heat insulating panel of FIG. 1 .

As shown in Figures 1 and 2, the insulation panel 200 according to an embodiment of the present invention includes a plurality of unit panels (U).

As shown in FIGS. 1 and 2, each unit panel U has a plate-like shape, and has a groove H formed along a first direction X at one end and a groove H along the first direction X. It includes a protrusion (P) formed on the other end. Grooves (H) and protrusions (P) of adjacent unit panels (U) are coupled so as to engage with each other.

At this time, the groove H and the protrusion P each have a pair of side walls parallel to the upper and lower surfaces of the unit panel U, and the side walls of the groove H and the side walls of the protrusion P are in contact with each other. can

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

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

Referring to FIG. 3 , when shrinkage occurs in the unit panel U due to heat, heat shrinkage also occurs in the grooves H and the protrusions P, and a space is formed between them. While horizontal movement of the unit panel is freed by the space, vertical movement may be limited. As such, if the movement in the horizontal direction is free, excessive generation of stress due to heat shrinkage can be prevented. In addition, since movement in the vertical direction is restricted, a level difference between adjacent unit panels U may be reduced.

4 is a view showing a connection portion of a heat 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 plurality along the second direction Y, which is the thickness direction of the unit panel U, and may be arranged at regular intervals. . At this time, the plurality of grooves H may have the same depth L1.

In addition, as shown in FIG. 4(b) and FIG. 4(c), the depth L1 of the plurality of grooves H and the protrusion P, the width L2 of the groove H and the protrusion P may be formed differently.

In the unit panel U shown in FIGS. 1 and 4 , the grooves H and the protrusions P may be symmetrical with respect to an imaginary center line that halves the thickness of the unit panel U.

The above unit panels may be connected through a connecting member to further reduce displacement in the vertical direction.

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

As shown in FIG. 5 , each unit panel U may be arranged in a plate shape with a predetermined gap G therebetween. At this time, two adjacent unit panels U may be connected by the connecting member 300 .

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

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

At this time, the connecting member 300 is inserted into the adjacent unit panel U to restrict movement in the vertical direction, and the neighboring unit panel U is connected to the connecting member 300 so that the two unit panels U are connected. equalize displacement. 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 halves the thickness of the unit panel U, It may be respectively installed on the top and/or bottom of the unit panel U. In addition, the connection member 300 may be installed on a virtual center line that bisects the thickness of the unit panel U, or may be installed symmetrically with respect to this virtual center line.

Figure 6 is a view showing the connecting portion of the insulating panel according to another embodiment of the present invention, Figure 7 is a schematic perspective view of the 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. there is. At this time, the second connection portion 32 is located in the gap (G).

In addition, as shown in (a) of FIG. 7 , the connecting member 302 may include a first connecting portion 31 and a third connecting portion 33 facing each other with the second connecting portion 32 as the center. At this time, the first connecting portion 31 is inserted into the end of the unit panel U exposed in the gap G (see FIG. 6), and the lower surface of the third connecting portion 33 is the 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 not exposed outside the unit panel U.

Also, as shown in (b) of FIG. 7 , the connecting member 303 may include at least one fourth connecting portion 34 between the first connecting portion 31 and the third connecting portion 33 . The fourth connection part 34 is installed to face the first connection part 31 and the third connection part 33, and is inserted into an end of the unit panel U to connect adjacent unit panels U.

In addition, as shown in (c) of FIG. 7 , the connecting member 304 may have a cross-shaped structure in which the first connecting portion 31 and the second connecting portion 32 intersect.

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

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

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

A protective plate (see reference numerals 11 and 14 in FIG. 9 ) may be further formed on the upper and/or lower portion of the unit panel U, and after the unit panel U is disposed on the protective plate at regular intervals, the grooves H and the protrusions may be formed. Connect so that (P) interlocks. Then, a connecting member 302 is inserted between adjacent unit panels U in a direction perpendicular to the direction in which the grooves H and protrusions 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 may be used in an insulation system for a liquefied cargo storage tank, which will be described with reference to FIG. 9 .

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

Since the primary membrane 100 comes into direct contact with liquefied natural gas in a cryogenic state, it may be made of a metal material resistant to low temperature brittleness such as aluminum alloy, invar, 9% nickel steel, and stainless steel that can respond to stress changes. there is. In addition, it may have a plurality of wrinkles 8 with a central portion raised so as to easily expand and contract despite repeated temperature changes and load changes of stored liquid. A protective plate (not shown) reinforcing the strength of the wrinkles 8 may be filled inside the wrinkles 8 .

The first membrane 100 is sealed welded on the first heat insulating layer 110, and may be performed by, for example, lapping welding or seam welding.

The primary heat insulating layer 110 includes an upper protective plate 11 and a primary insulating panel 12, and may include a lower protective plate (not shown). The upper protective plate 11 and the lower protective plate (not shown) are 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 properties. .

In the primary insulation panel 12, a plurality of unit panels U may be connected in a matrix as shown in FIG. Adjacent unit panels (U) may be connected by grooves (H) and protrusions (P). Also, end portions of the unit panel U in which the grooves H and the protrusions P are not formed may be connected through the connecting member 302 . At this time, the connecting member 302 may be respectively installed on the top and / or bottom of the primary insulation panel (12). In addition, the connecting member 302 may be installed on an imaginary center line that bisects the thickness of the unit panel U, or may be installed symmetrically with respect to this imaginary center line.

Polyurethane foam used as the primary insulation panel 12 may be deformed by contraction and expansion in a cryogenic environment, but as in the present invention, the end of the unit panel is connected with a groove (H) and a protrusion (P), By connecting through the connecting member 302, deformation due to contraction and expansion can be minimized.

The secondary membrane 120 may include one of fiber-reinforced composite materials such as stainless steel, aluminum, brass, zinc, and glass fiber, 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 insulating layer 130 includes a lower protective plate 14 and a secondary insulating panel 13, and may include an upper protective plate (not shown). The lower protective plate 14 and the upper protective plate (not shown) may be made of wood such as plywood.

In addition, a plurality of unit panels of the secondary insulation panel 13 may be connected in a matrix as shown in FIG. 8 . Adjacent unit panels (U) may be connected by grooves (H) and protrusions (P). Also, end portions of the unit panel U in which the grooves H and the protrusions P are not formed may be connected through the connecting member 302 . At this time, the connecting member 302 may be installed on 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 a virtual center line that bisects the thickness of the unit panel U, or may be installed symmetrically with respect to this virtual center line.

According to the above configuration, even if shrinkage occurs in the unit panel due to heat, it is free to move in the horizontal direction, thereby preventing excessive deformation of the insulation panel due to concentration of stress, minimizing deformation in the vertical direction, or The displacement of the unit panel can be made the same.

In this way, when the displacements of two adjacent unit panels change equally, a step difference due to the displacement does not occur between the two unit panels, so that the primary or secondary membrane located on the upper side is prevented from being deformed and damaged due to the step difference. there is.

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

It is obvious to those skilled in the art that the present invention is not limited to the above embodiments and can be variously modified or modified without departing from the technical gist of the present invention. it did

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

Claims (15)

A plurality of unit panels (U) disposed with a predetermined gap (G);
One or more connecting members 300, 301, 302, 303, 304 inserted into the end of the unit panel U exposed in the predetermined gap G to connect the adjacent unit panels U,
A plurality of the unit panels (U),
A groove (H) formed along the first direction (X) at one end of the third direction (Z), and a protrusion formed along the first direction (X) at the other end of the third direction (Z). Each has (P),
The first direction (X) is the width direction of the unit panel (U), the third direction (Z) is perpendicular to the first direction (X) but is the length direction of the unit panel (U), The direction (Y) is perpendicular to the first direction (X) and the third direction (Z), respectively, and is the thickness direction of the unit panel (U),
The grooves H and the protrusions P of the unit panels U adjacent to each other along the third direction Z are coupled so as to be interdigitated, so that even if heat shrinkage occurs in the unit panel U, the third To secure the degree of freedom of movement in the direction (Z),
A plurality of the unit panels (U),
The unit panels (U) disposed along the first direction (X) with the predetermined gap (G) adjacent to each other along the first direction (X) are the connecting members (300, 301, 303, 304) connected through
The connecting member (300, 301, 302, 303, 304),
A plate-shaped member extending along the third direction (Z), configured to include a first connection portion (31) extending along the third direction (Z), the exposed portion of the predetermined gap (G) It is inserted into the end of the unit panel (U) and is spaced apart at a predetermined interval in the second direction (Y), and a plurality of pieces are inserted to prevent movement in the second direction (Y) even if heat shrinkage occurs in the unit panel (U). Insulation panel, characterized in that to limit and to suppress the occurrence of convection by the predetermined gap (G). delete According to claim 1,
The connecting members 301, 302, 303, and 304,
Insulation panel characterized in that it is connected perpendicular to the first connection portion 31 and further comprises a second connection portion 32 positioned in the predetermined gap (G). According to claim 3,
The connecting members (302, 303) are vertically connected to the second connecting portion (32) and further include a third connecting portion (33) facing the first connecting portion (31). According to claim 4,
Insulation panel, characterized in that the lower surface of the third connection portion 33 is in contact with the upper or lower surface of the unit panel (U). According to claim 3,
Insulation panel, characterized in that the first connection portion 31 and the second connection portion 32 cross crosswise. According to claim 1,
The connecting member (300, 301, 302, 303, 304),
Insulation panel, characterized in that located on the imaginary center line that bisects the unit panel (U) in the thickness direction. According to claim 1,
The connecting member (300, 301, 302, 303, 304),
It is located closer to the upper surface of the unit panel U than a virtual center line that bisects the unit panel U in the thickness direction, or is located closer to the upper surface of the unit panel U than a virtual center line that bisects the unit panel U in the thickness direction. Insulation panel, characterized in that located adjacent to the lower surface of (U). According to claim 1,
The connecting member (300, 301, 302, 303, 304),
Insulation panel, characterized in that located symmetrically with respect to the imaginary center line that bisects the unit panel (U) in the thickness direction. As an insulation system for storing liquefied gas,
A secondary insulation layer 130 installed on the inner wall of the hull and including a secondary insulation panel 13;
a secondary membrane 120 formed on the secondary thermal insulation layer 130;
A primary thermal insulation layer 110 formed on the secondary membrane 120 and including a primary thermal insulation panel 12; and
a primary membrane 100 formed on the primary thermal insulation layer 110;
including,
At least one of the secondary insulation panel 13 and the primary insulation panel 12 comprises the insulation panel according to any one of claims 1, 3 to 9. Insulation system. According to claim 10,
The secondary insulation panel 13 or the primary insulation panel 12 is an insulation system, characterized in that it comprises a polyurethane foam. According to claim 10,
The secondary insulating layer 130 includes a lower protective plate, the secondary insulating panel 13 and an upper protective plate,
Insulation system, characterized in that the lower protective plate and the upper protective plate comprises a plywood. According to claim 10,
The primary insulating layer 110 includes a lower protective plate, the primary insulating panel 12 and an upper protective plate,
Insulation system, characterized in that the lower protective plate and the upper protective plate comprises a plywood. According to claim 10,
The primary membrane 100 has a heat insulation system, characterized in that it has a wrinkled portion (8) protruding from the primary thermal insulation layer (110). 15. The method of claim 14,
Insulation system, characterized in that a protective plate for reinforcing the strength of the corrugated portion (8) is formed on the inside of the corrugated portion (8).