Insulation panel

Abstract

The present invention relates to an insulating panel comprising: an insulating layer including an insulating material; a first protective layer having an adhesive surface that is bonded to the insulating layer; a second protective layer disposed on top of the first protective layer, wherein glass fibers are arranged in an in-plane direction; and a third protective layer disposed on top of the second protective layer, wherein the third protective layer has fire resistance, and the first to third protective layers may have a higher structural strength than the insulating layer.

Description

Technology Field

[0001] The present invention relates to an insulating panel, and more specifically, to an insulating panel capable of effectively insulating a cargo hold inside a ship in which cryogenic liquefied gas is stored. Background Technology

[0002] Liquefying gas reduces its volume, making storage and transportation easier. Gas in this state is called liquefied gas. For example, among liquefied gases, LNG has a liquefaction temperature of -163 degrees Celsius at atmospheric pressure, so the internal temperature of the cargo tank must be maintained at an extremely low temperature to store and transport it. In the case of liquefied hydrogen, the liquefaction temperature is -235 degrees Celsius, which is lower than that of LNG, so the internal temperature of the cargo tank must be maintained at an even lower temperature than that of LNG.

[0003] Therefore, liquefied gas carriers may require an insulation system capable of maintaining the internal temperature of the cargo tanks at cryogenic levels. If the insulation of the cargo tanks is insufficient and the thermal conductivity of the storage tanks is high, the liquefied gas may vaporize, generating Boil-off Gas (BOG). The generation of BOG can reduce the remaining amount of transported liquefied gas, leading to significant economic losses. Accordingly, to minimize BOG and maximize the remaining amount of liquefied gas, insulation panels with excellent thermal performance may be installed in the cargo holds.

[0004] In particular, since ultra-low temperature liquefied gases such as hydrogen are sometimes installed in vacuum spaces, there is a need to address challenges such as the reduction in vacuum level due to outgassing or the need to enhance insulation performance. The problem to be solved

[0005] The present invention relates to an insulating panel, and more specifically, aims to provide an insulating panel capable of effectively insulating a cargo hold inside a ship in which cryogenic liquefied gas is stored. means of solving the problem

[0006] The insulation panel of the present invention comprises: an insulation layer including an insulating material; a first protective layer having an adhesive surface that is bonded to the insulation layer; a second protective layer disposed on top of the first protective layer, wherein glass fibers are arranged in an in-plane direction; and a third protective layer disposed on top of the second protective layer, wherein the third protective layer has fire resistance, and at least one of the first to third protective layers may have a structural strength higher than that of the insulating material of the insulation layer.

[0007] In one example, the first protective layer may have an uneven surface on the side that is joined to the insulating layer.

[0008] In one example, the second protective layer comprises a plurality of second-1 protective layers in which the glass fibers are arranged in a first direction; and a plurality of second-2 protective layers in which the glass fibers are arranged in a second direction, wherein the first direction and the second direction are orthogonal to each other, and the number of the second-1 protective layers and the second-2 protective layers may be the same.

[0009] In one example, the 2-1 protection layer and the 2-2 protection layer may be arranged alternately.

[0010] In one example, the arrangement order of the 2-1 protection layer and the 2-2 protection layer may be vertically symmetrical.

[0011] In one example, the third protective layer has a recessed surface in which a portion of the outer surface is processed and recessed, and an anchor strip can be inserted and fixed into the recessed surface.

[0012] In one example, the first to third protective layers may be integrally formed by heat-fusing their mutually facing surfaces. Effects of the invention

[0013] The insulation panel of the present invention can effectively insulate a cargo tank inside a ship where cryogenic liquefied gas is stored by arranging multiple protective layers having different characteristics. Brief explanation of the drawing

[0014] Figure 1 is a drawing showing an insulating panel of the present invention. Figure 2 is a drawing showing the protective layer of the thermal insulation panel of the present invention. Figure 3 is a drawing showing the second protective layer of the thermal insulation panel of the present invention. Figure 4 is a drawing showing an insulating panel of the present invention with accessories installed. Figure 5 is a diagram showing the protective layer of the insulation panel of the present invention being joined through thermal fusion. Figure 6 is a drawing showing the protective layer of the insulation panel of the present invention being bonded through adhesion. Figure 7 is a drawing showing the protective layer of the insulation panel of the present invention being joined by fitting. Specific details for implementing the invention

[0015] Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in describing the embodiments of the present invention, if it is determined that a detailed description of related known components or functions would hinder understanding of the embodiments of the present invention, such detailed description is omitted.

[0016] In addition, terms such as first, second, A, B, (a), (b), etc., may be used when describing the components of the embodiments of the present invention. These terms are intended merely to distinguish the components from other components, and the essence, order, or sequence of the components is not limited by these terms. Where it is stated that a component is "connected," "combined," or "joined" to another component, it should be understood that the component may be directly connected or joined to the other component, but that another component may also be "connected," "combined," or "joined" between each component.

[0017] In this specification, the front-back, left-right, and up-down directions are referred to for convenience of explanation and may be directions orthogonal to one another. However, these directions are determined relatively, and the term "up-down direction" does not necessarily mean a vertical direction.

[0019] Referring to FIGS. 1 to 7, the insulation panel (1) of the present invention comprises: an insulation layer (100) including an insulating material; a first protective layer (210) having an adhesive surface that is bonded to the insulation layer (100); a second protective layer (220) disposed on the upper surface of the first protective layer (210) and having glass fibers (10) arranged in an in-plane direction; and a third protective layer (230) disposed on the upper surface of the second protective layer (220) and having fire resistance, wherein at least one of the first to third protective layers (210, 220, 230) may have a structural strength higher than that of the insulating material of the insulation layer (100).

[0020] The insulation panel (1) can be laminated on the inner wall of a cargo tank where cryogenic liquefied gas is stored to minimize heat intrusion from the outside of the cargo tank.

[0021] The insulation panel (1) may include an insulation layer (100). The insulation layer (100) is a layer containing an insulating material with excellent insulation performance inside, and can function as a main layer to prevent heat intrusion from the outside.

[0022] For example, the insulation layer (100) may include an insulation material formed from materials such as polyurethane foam (PUF), phenolic foam, vacuum insulation, aerogel blanket, and glass wool. However, the types of insulation materials included in the insulation layer (100) are not limited thereto, and the insulation layer (100) may include two or more types of insulation materials.

[0023] The insulation panel (1) may include a protective layer (200). The protective layer (200) has a higher structural strength than the insulation layer (100) and can function as a main layer protecting the insulation layer (100) by being laminated on the upper or lower part of the insulation layer (100).

[0024] As illustrated in FIGS. 1 to 7, the protective layer (200) may not be formed as a single layer having the same characteristics, but may be formed as a composite layer including various layers having different characteristics (e.g., different materials).

[0025] In FIG. 1, the protective layer (200) placed on the upper layer of the insulation layer (100) is shown as a composite layer including various layers, and the protective layer (200) placed on the lower layer of the insulation layer (100) is shown as a single layer, but this is merely an example and may be formed as a composite layer in the same way.

[0026] Below, each layer of the protection layer (200) is described in detail.

[0027] The protective layer (200) may include a first protective layer (210), a second protective layer (220), and a third protective layer (230). The first to third protective layers (210, 220, 230) may all have structural strength superior to that of the insulation layer (100).

[0028] The first to third protective layers (210, 220, 230) may have a sufficiently small coefficient of thermal expansion and uniform physical properties to minimize deformation caused by cryogenic liquefied gases such as hydrogen. For example, the coefficient of thermal expansion is It may be less than.

[0029] Additionally, when an insulation panel (1) is installed in a vacuum insulation space, a decrease in insulation performance due to outgassing may occur; therefore, the first to third protective layers (210, 220, 230) may be formed to have low outgassing. To maintain low outgassing, a coating with low outgassing or a polymer material with low outgassing may be applied to the first to third protective layers (210, 220, 230). Outgassing is calculated by measuring the mass change of a specimen exposed to a vacuum environment for 24 hours using the Total Mass Loss test method, and, for example, it may be determined that the specimen can be utilized in a vacuum environment only when the mass change before and after exposure to a vacuum environment for 24 hours is less than 1%. On the other hand, conventional plywood has significantly high outgassing, and there was a problem where outgassing over 24 hours measured by the Total Mass Loss test method was 5% or more. It is known that significant outgassing occurs not only in plywood but also in paint, acrylic, and some ceramic materials.

[0030] The first to third protective layers (210, 220, 230) can enhance the thermal insulation performance of the insulation panel (1) by having additional individual characteristics in addition to the common characteristics described above. The first to third protective layers (210, 220, 230) may be formed of polypropylene, polyethylene, epoxy, or polycarbonate, but the specific composition of each layer may differ and may include other materials.

[0031] One side of the first protective layer (210) may be bonded to the insulation layer (100). The first protective layer (210) and the insulation layer (100) may be bonded using an adhesive. Alternatively, one side of the first protective layer (210) in contact with the insulation layer (100) may itself have adhesive properties, and thus the insulation layer (100) and one side of the first protective layer (210) may be more easily heat-fused. However, the bonding method is not limited to adhesive or heat fusion, and may also be mechanically bonded.

[0032] One side of the first protective layer (210) combined with the insulation layer (100) may have irregularities. By having one side of the first protective layer (210) not smooth but rough, the contact area with one side of the insulation layer (100) is widened, thereby increasing the bonding strength.

[0033] The second protection layer (220) may be placed on the upper layer of the first protection layer (210). That is, the second protection layer (220) may be an intermediate layer placed between the first protection layer (210) and the third protection layer (230) to be described later.

[0034] The second protective layer (220) may have superior structural strength compared to the first and third protective layers (210, 230). Additionally, the second protective layer (220) may be formed from a material having superior thermal insulation performance compared to the first and third protective layers (210, 230).

[0035] The second protective layer (220) may have glass fibers (10) arranged in an in-plane direction inside it. The second protective layer (220) can have its structural strength reinforced and its coefficient of thermal expansion reduced in the direction in which the glass fibers (10) are arranged. Additionally, the structural strength and the coefficient of thermal expansion can be controlled by adjusting the content of the glass fibers (10).

[0036] Referring to FIG. 3, the second protective layer (220) comprises a plurality of second-1 protective layers (220-1) in which glass fibers (10) are arranged in a first direction; and a plurality of second-2 protective layers (220-2) in which glass fibers (10) are arranged in a second direction, wherein the first direction and the second direction are orthogonal to each other, and the number of second-1 protective layers (220-1) and second-2 protective layers (220-2) may be the same.

[0037] The second protective layer (220) may include a plurality of layers. Each of the plurality of layers has a different arrangement direction of the glass fibers (10), and each layer has the greatest strength against loads in different directions.

[0038] For example, as shown in FIG. 3, the second-1 protective layer (220-1), in which glass fibers (10) are arranged in the x-direction, has its structural strength reinforced against loads acting in the x-direction, and the second-2 protective layer (220-2), in which glass fibers (10) are arranged in the y-direction, has its structural strength reinforced against loads acting in the y-direction.

[0039] The glass fiber arrangement directions of the second-1 protective layer (220-1) and the second-2 protective layer (220-2) of FIG. 3 are orthogonal to each other in the x and y directions, respectively, and the number of the second-1 protective layer (220-1) and the second-2 protective layer (220-2) is the same at two each.

[0040] By arranging the 2-1 protection layer (220-1) and the 2-2 protection layer (220-2) in equal numbers, the 2 protection layer (220) can have the same structural strength and thermal expansion coefficient in the x and y directions.

[0041] Additionally, as shown in FIG. 3, the second-1 protection layer (220-1), the second-2 protection layer (220-2), the second-2 protection layer (220-2), and the second-1 protection layer (220-1) are arranged in the order from the top to the bottom, so that the arrangement order of the second-1 protection layer (220-1) and the second-2 protection layer (220-2) may be vertically symmetrical. As another example of vertical symmetry, they may be arranged in the order of the second-1 protection layer (220-1), the second-2 protection layer (220-2), the second-1 protection layer (220-1), the second-1 protection layer (220-1), the second-2 protection layer (220-2), and the second-1 protection layer (220-1).

[0042] However, not limited thereto, the 2-1 protection layer (220-1) and the 2-2 protection layer (220-2) may be arranged alternately. For example, they may be arranged in the order of the 2-1 protection layer (220-1), the 2-2 protection layer (220-2), the 2-1 protection layer (220-1), and the 2-2 protection layer (220-2).

[0043] However, this is merely an example, and the arrangement direction, number, and arrangement order of the glass fibers in the 2-1 protection layer (220-1) and the 2-2 protection layer (220-2) may vary.

[0044] For example, depending on the stacking position of the insulation panel (1), the load applied to the second protection layer (220) may vary depending on the direction, and therefore, the arrangement direction, number, etc. of the glass fibers within the second protection layer (220) can be appropriately modified in consideration of this.

[0045] Additionally, the second protective layer (220) may be formed as a very thin film type, and an adhesive film may be placed between the second-1 protective layer (220-1) and the second-2 protective layer (220-2). The second protective layer (220) may be approximately 5 mm thick.

[0046] The third protection layer (230) may be placed on the upper layer of the second protection layer (220). That is, the third protection layer (230) may be a layer placed on the outermost side of the protection layer (200).

[0047] The third protective layer (230) may have fire resistance by applying a flame-retardant material or by performing a coating treatment on the material. The third protective layer (230) is a layer placed on the outermost side of the protective layer (200), that is, on the outermost side of the insulation panel (1), and may have an accessory such as an anchor strip installed thereon, and a metal barrier (not shown) to prevent leakage of liquefied gas may be welded to the anchor strip. When welding the metal barrier to the anchor strip, the temperature of the third protective layer (230) may rise above 200 degrees Celsius, and even after the welding is finished, the mechanical strength of the protective layer (200) must be sufficient to protect the insulation layer (100). For example, the third protective layer (230) may be formed so that the mechanical strength of the protective layer (200) does not drop below 85% compared to before welding by having fire resistance.

[0048] Referring to FIG. 4, the third protective layer (230) has a recessed surface (231) formed by processing a portion of the outer surface, and an anchor strip (20) can be inserted and fixed into the recessed surface (231).

[0049] As illustrated in FIG. 4, a recessed surface (231) recessed downwardly can be formed in the center of the upper surface of the third protective layer (230) through pressing or cutting. An anchor strip (20) can be inserted into the recessed surface (231) and secured by a rivet (30). The anchor strip (20) may be a 316L plate with high material compatibility with liquid hydrogen.

[0050] The rivet (30) is fixed by penetrating not only the third protective layer (230) but also the first and second protective layers (210, 220), thereby improving the bonding strength between the third protective layer (230) and the anchor strip (20), as well as the bonding strength between the first to third protective layers (210, 220, 230).

[0051] In the past, when plywood served as a protective layer, additional cutting was performed on the finished plywood to create a recessed surface (231) for inserting and fixing the anchor strip (20).

[0052] However, in the case of the third protective layer (230) of the insulation panel (1) of the present invention, a recessed surface (231) is formed on the finished third protective layer (230) itself by performing a pressing process together when manufacturing the third protective layer (230), and this can have the effect of reducing manufacturing time.

[0053] Additionally, a metallic insert (40) may be formed on the upper surface of the third protective layer (230), and the metallic insert (40) may also penetrate all of the first to third protective layers (210, 220, 230).

[0054] Referring to FIG. 5, the first to third protective layers (210, 220, 230) can be formed integrally by heat-fusion of their mutually facing surfaces. As shown in FIG. 5, heat and pressure can be applied to the lower surface of the first protective layer (210) and the upper surface of the third protective layer (230) to heat-fuse them.

[0055] However, it is not limited to thermal fusion and may be formed integrally by other joining methods.

[0056] For example, referring to FIG. 6, the first to third protective layers (210, 220, 230) may be integrally formed by bonding the surfaces facing each other. The bonding surfaces of the first to third protective layers (210, 220, 230) may have irregularities formed to increase the contact area, or the adhesiveness may be improved by inserting paper between them.

[0057] As another example, referring to FIG. 7, the first to third protective layers (210, 220, 230) may be mechanically joined at their mutually facing surfaces. As shown in FIG. 7, the first to third protective layers (210, 220, 230) may be joined by a fit. Alternatively, they may be joined by a screw connection, a key / hole method, etc.

[0059] The foregoing description is merely an illustrative explanation of the technical concept of the present invention, and those skilled in the art to which the present invention pertains will be able to make various modifications and variations within the scope of the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are intended to explain, not limit, the technical concept of the present invention, and the scope of the technical concept of the present invention is not limited by these embodiments. The scope of protection of the present invention shall be interpreted by the claims below, and all technical concepts within an equivalent scope shall be interpreted as being included within the scope of rights of the present invention. Explanation of the symbols

[0060] 1 : Insulation panel 10: Fiberglass 20 : Anchor strip 30: Rivet 40 : Metallic insert 100: Insulation layer 200 : Protection layer 210: 1st protection layer 220: Second protection layer 230: Third protection layer

Claims

Claim 1 An insulation panel comprising: an insulation layer including an insulating material; a first protective layer having an adhesive surface that is bonded to the insulation layer; a second protective layer disposed on top of the first protective layer, wherein glass fibers are arranged in an in-plane direction; and a third protective layer disposed on top of the second protective layer, wherein the third protective layer has fire resistance, and at least one of the first to third protective layers has a structural strength higher than that of the insulating material of the insulation layer. Claim 2 In claim 1, the first protective layer is an insulating panel having an uneven surface that is joined to the insulating layer. Claim 3 In claim 1, the second protective layer comprises a plurality of second-1 protective layers in which the glass fibers are arranged in a first direction; and a plurality of second-2 protective layers in which the glass fibers are arranged in a second direction, wherein the first direction and the second direction are orthogonal to each other, and the number of the second-1 protective layers and the second-2 protective layers is the same, an insulating panel. Claim 4 In claim 3, the 2-1 protective layer and the 2-2 protective layer are alternately arranged in an insulating panel. Claim 5 In claim 3, the arrangement order of the 2-1 protective layer and the 2-2 protective layer is vertically symmetrical for the insulation panel. Claim 6 In claim 1, the third protective layer has a recessed surface in which a portion of the outer surface is processed and recessed, and an insulating panel in which an anchor strip can be inserted and fixed to the recessed surface. Claim 7 In claim 1, the first to third protective layers are an insulating panel integrally formed by heat-fusion of their mutually facing surfaces.

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