KR101927888B1 - Thermal structure - Google Patents

Abstract

The present invention relates to an adiabatic structural frame. First, a structure of a connection portion of an adiabatic structural frame is improved to minimize or prevent a heat bridge phenomenon. Secondly, a vacuum heat insulating material is disposed inside a core layer of the adiabatic structural frame to improve an adiabatic performance. Lastly, the core layer is made of a non-sparkling polymer material with an excellent structural performance to increase structural rigidity, prevent access of the vacuum heat insulating material through an airtight adhesive structure of the core layer, and intensify fire protecting performance not to be vulnerable to a fire. Therefore, the adiabatic structural frame is able to be generally used to a field that requires a heat insulation performance and a structural performance.

Description

{THERMAL STRUCTURE}

The present invention relates to a heat insulating structural member having a heat insulating performance and a structural member performance, and more particularly, it is possible to minimize or prevent a heat bridging phenomenon by improving a connection structure of a heat insulating structural member, A core layer is formed of a non-foamable polymer material having an excellent structural performance to increase the structural rigidity and the core layer uniformly surrounds the entire surface of the vacuum insulation material, The present invention relates to a heat insulating structural member which prevents the gas from entering and extinguishing the insulating material, and which enhances the fire resistance performance so as not to be vulnerable to fire.

In general, composite laminate structural materials are produced by injecting an elastomer into a closed metal box, and they are also used as structural materials for replacing iron structural materials in concrete structures and shipbuilding buildings.

Patent Publication No. 10-0742033 discloses a composite laminated structural member, and the conventional composite laminated structural member disclosed in the publication has the following problems.

First, the conventional composite laminated structural member is a structural member designed mainly for load and impact, and has a limited function as a heat insulating material for heat insulation performance. That is, since the first metal layer and the second metal layer constituting the metal box are adhesively connected to the intermediate layer of the polymer (elastomer) having a relatively high density, thermal bridging occurs at the entire surface of the first metal layer and the second metal layer.

The thermal bridging phenomenon is a phenomenon in which the end portion of the insulation structure structure is relatively lower in temperature than the other portions, and a lot of heat flows through the end portion of the insulation structure structure, and the cryogenic cargo such as liquefied gas (LNG or LPG) Is a phenomenon in which the heat insulating property is remarkably lowered. For example, when a metal material having a very high thermal conductivity is installed through a thickness direction, a considerable amount of heat flows through the metal material.

In the conventional composite laminated structural member, since the thermal conductivity of the first metal layer and the second metal layer is very high in structure, the function as a heat insulator is mainly performed by an intermediate layer composed of a polymer (elastomer).

However, the thermal conductivity (k-value) of a generally used elastomer is about 0.17 to 0.18 W / m 占 K (based on 20 占 폚), which is not even compared with insulation materials such as aerogels and vacuum insulation materials, The conventional composite laminate structural material is not suitable for use as a heat insulating material because the heat insulating performance is remarkably lower than that of the organic and inorganic thermal insulating materials (thermal conductivity 0.030 to 0.045 W / m 占 사용) used.

In recent years, most of the heat insulating structural materials disclosed in the related art have not been well-known in terms of the heat insulating structural material (or the composite panel) having both the insulating performance and the structural performance, Liquefied gas) is not applicable to cargo holds.

In the conventional heat insulating structural member, the perimeter bar is formed of a metal to maintain the structural rigidity. However, the metal has a high thermal conductivity and a thermal bridging phenomenon, resulting in a problem of significantly deteriorating the heat insulating performance.

1 (a), a ferrimeter bar 5 made of metal is provided between the lower metal plate 3 and the upper metal plate 4, A polyurethane layer 7 is formed between the metal plate 3 and the upper metal plate 4 and the adjacent upper metal plates 4 are connected to each other at the end of the upper metal plate 4 It is assumed that the heat bridge phenomenon prevention member 6 is installed.

Panel type refers to the way in which finished insulation materials are arranged adjacent to each other, and the insulation material is connected through welding or other fastening method.

However, even if the thermal bridge preventing member 6 is provided, as shown by the arrows in FIG. 1 (b), heat flows at both ends of the thermal bridge preventing member 6 and at the end of the upper metal plate 4 It is expected that the problem of heat bridging phenomenon which remarkably lowers the heat insulating property still occurs because the heat flow is concentrated and transferred through the perimeter bar 5 as indicated by the dotted arrow.

On the other hand, the overlay type shown in FIG. 1 (c) is a method of directly constructing at the construction site, in which the ferrimeter bar 5 and the upper metal plate 4 are laminated on one lower metal plate 3 . A ferrimeter bar 5 of metal is provided at the end of the lower metal plate 3 and the upper metal plate 4 and a polymer layer 7 is provided between the lower metal plate 3 and the upper metal plate 4. [ And the ferrimeter bar 5 is made of a metal material.

However, in the overlay type heat insulating structural member, it can be expected that the problem of the thermal bridging phenomenon in which the heat flow is transmitted through the ferrimeter bar 5 of the metal as indicated by the dotted arrow, and the heat insulating property is remarkably lowered still occurs.

Conventionally, there are the following problems.

1) It causes thermal bridge phenomenon.

A ferrimeter bar made of a metal material is used to constitute a metal box (a space in which a polymer layer is formed). However, due to the nature of the metal material, the ferrimeter bar causes a phenomenon of excessive heat bridging, It plays a major role in rapidly raising the temperature on the opposite side of the city.

When a general ferrimeter bar is used, typically about 3 to 7% of the total area is formed by a rapid thermal cross-section connected directly to a metal perimeter. Assuming that the most common steel is used, the thermal conductivity of this cross-section is typically about 80 to 100 times higher than that of the core material, and once heat is transferred to the opposite side, heat transfer occurs rapidly through the metal plate with high thermal conductivity . Thus, in this case, about 20% to 40% of the opposite area results in an insulation problem.

For these reasons, structural materials using non-foamable polymers often require the exterior of the structural material to be coated with refractory or refractory coatings.

2) Vacuum insulation has a technical limitation in application to insulation.

First, the function as a structural material is very weak. The elastic modulus of vacuum insulation is about 50 ~ 80 MPa, which is about 3000 times smaller than the modulus of elasticity of iron. Therefore, it is impossible to manufacture the bottom floor of a building or the low-temperature tank of a ship only with one vacuum insulator.

Also, on the side of the heat insulation, when the covering of the vacuum insulator is damaged by the external impact, there is the disadvantage that the external air is made in and out, and the heat insulating performance is remarkably reduced.

That is, the outer covering material of the vacuum insulating material effectively plays the role of surrounding the inner filling material in the vacuum chamber, so a thin aluminum-type or composite coating material having similar performance is used. These coatings are very vulnerable to external impacts and scratches, and as time goes by, external air or moisture permeates the inside of the vacuum insulation material, resulting in a slight deterioration in the heat insulation performance.

3) Foam polymers (eg polyurethane) are very vulnerable to fire.

Conventional large LPG or LNG carriers use foamable polymer as insulation to maintain the low temperature of the cargo hold.

That is, when a dense non-foamable polymer is used, the heat-insulating performance is significantly lowered, so that the foam-causing material is mixed to form a foamed expansion structure inside the core layer. The problem is that the foam material applied to such LPG or LNG carrier is very vulnerable to fire and emits very harmful gases to the human body in case of fire. There are many cases of fires using foamed polymer as well as shipbuilding and freezing / cold storage warehouses for land use. Welding fire during drying is also a problem, but the foamable polymer is very vulnerable to fire even after drying.

4) It is difficult to apply the non-foamable polymer structural material as a thermal insulation material for low temperature tank of LPG or LNG carrier because the insulation performance is poor.

In the case of structural materials using non-foamable polymers, there are relatively advantages over foamed polymeric structures in terms of fire, due to the flame retardant and non-toxic characteristics of non-foamable polymers, which are typically made of metal boxes and made of a gas-tight structure.

That is, even though the non-foamable polymer injected into the closed space in the metal box is exposed to a temperature of about 300 DEG C or more for several tens of minutes, the inner non-foamable polymer has air tight airtight characteristics and a very dense density (Normal specific gravity of 1.0 or more), carbonization occurs on a part of the surface of the internal non-foamable polymer and is only a degree of burning. However, the insulation performance of the non-foamable polymer structural material is extremely low to one fifth to one-seventh of that of general EPS insulation. Therefore, it is difficult to apply the structural material using the non-foamable polymer to the LPG or LNG carrier low-temperature tank, since it is difficult to primarily satisfy the heat insulation performance of LPG or LNG carrier low temperature tank.

5) Since the non-foamable polymer structural material has poor heat insulation performance, it is difficult to apply it to the structure to which the fire resistance standard is applied.

The non-foamable polymer structural members are superior to the foamed polymer structural members in terms of fire resistance, but the insulation performance is insufficient. Therefore, there is a limit to maintaining the temperature of the opposite side, which is not exposed to fire as a general fire resistance standard, at 110-180 ° C for a long period of time.

In practice, when applied to building floors with a fire resistance of 2 hours or more, composite laminate structural materials using non-foamable polymers are required to be coated with fireproof coatings and heat insulating materials. Therefore, applying non-foamable polymer structural materials to refractory reference structures it's difficult.

6) Vacuum insulation can not be used as a fireproofing insulation in the usual way.

The core material (eg, fumed silica) constituting the vacuum insulation material has properties similar to those of the sand grains. Therefore, it belongs to the nonflammable material that does not burn even when the temperature rises. If the vacuum can be maintained only at a high temperature, It is almost implemented. However, as described above, the vacuum insulation material uses a thin aluminum or composite coating material having similar performance to maintain the degree of internal vacuum. Such a composite coating material easily deforms even when the temperature is slightly increased, thereby causing a crack in the composite coating or breaking it, and the degree of the vacuum in the interior of the composite coating rapidly drops.

As a result, the heat insulating performance of the vacuum insulating material is far superior to that of other insulating materials, but it can not be used as a heat insulating material for fire resistance. In practice, the maximum permissible high temperature of a vacuum insulator is generally only about 100 ° C to 150 ° C, so that a vacuum insulator can not be used as a fireproof insulator.

Korean Patent Publication No. 10-1997-0005615

SUMMARY OF THE INVENTION It is an object of the present invention to solve the aforementioned problems. First, it is possible to minimize or prevent thermal bridge phenomenon by improving the connection structure of the heat insulating structural member. Second, an intermediate layer including a vacuum insulating material is disposed inside the core layer of the heat insulating structural member The third core layer is made of a non-foam polymer having excellent structural rigidity to enhance the structural rigidity and the core layer of the non-foam polymer material uniformly surrounds the entire surface of the vacuum insulation material, Fourth, it is possible to greatly improve the self-refractory function realized without the aid of separate refractory coatings or heat insulating materials, thereby improving the heat insulating performance, structural performance, and fields requiring fireproofing and fireproofing functions, And can be widely applied to buildings and structures.

In order to achieve the above-mentioned object, the present invention provides a heat insulating structural member.

The heat insulating structural member of the present invention comprises a lower plate; An upper plate disposed above the lower plate at a predetermined distance from the lower plate; An intermediate layer including a heat insulating material disposed between the bottom plate and the top plate; A connection part which is provided at the end of the lower plate and the upper plate for preventing thermal bridging and for structural fastening and composed of a mixture of a metal layer and a nonmetal layer; A core layer provided in a space defined by the lower plate, the upper plate, the intermediate layer, and the connection portion; .

The heat insulating material includes at least one of a vacuum insulating material, an airgel insulating material, a slim organic and inorganic insulating material, and an irregular type insulating material.

In addition,

A lower connection portion of a metal material fixed to the lower plate, and an upper connection portion of a metal material fixed to the upper plate, wherein the lower connection portion and the upper connection portion are formed of a laminated structure having a non- .

In addition,

A lower connection part made of a metal material fixed to the lower plate and an upper connection part made of a metal which is fixed to the upper plate and arranged in a line with the lower connection part, And a stepped structure interposing a polymer.

In addition,

A lower connection part made of a metal material fixed to the lower plate and an upper connection part made of a metal which is fixed to the upper plate and arranged in a line with the lower connection part, and an intermediate connection part between the lower connection part and the upper connection part, Polymer intervening,

The non-foamable polymer may have a filling step structure in which a gap between the lower connection part and the upper connection part is cut off using a temporary blocking member and then integrally formed with the core layer during the filling and curing process of the core layer .

In addition,

A lower connection part of a metal material fixed to the lower plate, and an upper connection part of a metal material fixed to the upper plate, wherein a non-expandable polymer is formed as an intermediate connection part between the lower connection part and the upper connection part,

The upper connection part is detachably coupled to the upper plate, and a liquid non-foamable polymer is injected and cured in a space between the upper connection part and the lower connection part so as to be integrally formed with the core layer, And can be configured as a filled-up type structure.

In the connecting portion, a plurality of fastening holes are formed in the rim of the lower plate and the upper plate, the fastening holes passing through the lower plate and the upper plate vertically, and the connecting portion is formed in the fastening hole And a bolt fastening structure for fastening the bolts.

The non-metallic layer constituting the connection part may be provided with a heat insulating material and a connector for enhancing insulation and structural performance.

Further, an intermediate layer is further included in the space (space between the lower plate and the upper plate)

The intermediate layer may be provided on the lower side of the upper plate, or may be provided in the core layer or on the upper side of the lower plate.

Wherein the intermediate layer comprises a vacuum insulation material,

When the intermediate layer is provided on the lower side of the upper plate, the intermediate layer may be slidably installed with the upper plate.

A connector may be fixedly installed between the upper plate and the lower plate.

The core layer protects the vacuum insulator from external impact and is filled with a liquid non-foamable polymer into the space to maintain the structural rigidity, and is cured to be hermetically bonded to the inner surface of the space Lt; / RTI >

The non-expandable polymer may be a non-expandable polyurethane, and preferably a polymer having a structural modulus of elastic modulus of 200 MPa or more may be used.

The intermediate layer may include a vacuum insulation material as a basic constituent, and may further include at least one of a vacuum insulation material surface protection material, a reinforcing insulation material, and a slip material.

Wherein the vacuum insulation material is installed between the core layer and the top plate to have a heat insulation performance,

Wherein the vacuum insulator surface protection member is disposed between the vacuum insulator and the top plate to prevent damage to the vacuum insulator,

The slip material may enable slip with the top plate.

The core layer may be bonded to (adhered to) the box layer formed in the box space defined by the lower plate, the upper plate, and the connection portion. The core layer may be hermetically bonded to surround the vacuum insulator.

A lightweight shaped body may be provided in the core layer.

In addition, a panel type in which one of the upper plates is disposed on one of the lower plates and the adjacent heat insulating structural members are connected to each other, and a plurality of upper plates are disposed on one of the lower plates, And an overlay type.

The overlay type includes a lower connection part of a metal material to which the connection part is fixed to the lower plate and an upper connection part made of a metal material to be fixed to the upper plate and between the lower connection part and the upper connection part, Can intervene.

 Generally, in the case of LPG or LNG membrane hold holds using foamed polymer, a heat insulating box with a thickness of 200 to 500 mm is usually manufactured at the factory and attached to the cargo hold, and then coated with a metal plate or synthetic material having a good low- do. Such a membrane structure is basically required to have a design tolerance of about 10 to 20 mm between the heat insulating boxes. However, in many cases, the gap between the heat insulating boxes is formed to be equal to or larger than the design tolerance in many cases, within a period of aging over which the shrinkage / expansion of the heat insulating box is repeated.

That is, in any case, there is a considerable gap between the insulation boxes. Therefore, significant thermal bridging may occur between these gaps, and a significant amount of gas may be trapped between gaps when the gas leaks.

In the present invention, since it is possible to form an airtight structure without such a gap, when applied to low-temperature and cryogenic cargo holds, it is much superior to the membrane type cargo holds in an adiabatic manner and is safe.

Further, in the case of making a heat insulating box using a foamable polymer, since the plywood constituting the heat insulating box is adhered to the upper part of the structurally soft foamable polymer, the plywood is frequently broken by the sloshing impact. That is, if a plywood is placed on a hard stone plate and a large impact is applied, the plywood itself may be crushed but it is not broken. However, if the plywood is placed on the bed and impact is applied, the plywood itself is broken first.

In order to prevent this, a high-density expandable polymer having a density of about 60 to 400 kg / m < 3 > is used. However, due to the internal gas cell, the insulation box is still vulnerable to breakage by sloshing.

In the present invention, since the non-expandable polymer used as the material of the core layer has a density of 900 kg / m < 3 > or more and a considerably high density material, the intermediate layer including the heat insulating material disposed on the core layer material is effectively protected from breakage by sloshing can do.

On the other hand, the heat insulating structural member of the present invention comprises a metal upper plate; A metal lower plate positioned with a predetermined space with the metal upper plate; A vacuum insulator inserted between the metal upper plate and the lower metal plate; And a non-foamable resin covering the vacuum insulation material as a whole and being in tight contact with the metal upper plate and the metal lower plate; . ≪ / RTI >

As described above, the present invention has the following effects.

1) It has a light but very strong structural function. That is, it has the function as an effective composite laminate structure formed of the upper and lower metal plates and the core layer.

It is possible to withstand the enormous in-plane stress of the entire metal plate disposed on the upper and lower portions and to achieve a composite single behavior of the whole structure owing to the role of the non-foamable polymer, which is one of the core layers in the heat insulating structural material. So that the sectional modulus also increases, so that it has a very effective function as a structural member. In addition, since the non-expandable polymer has a shock-resistant property, the heat insulating structural material of the present invention can effectively absorb an external impact.

2) By forming a nonmetallic layer, for example, a non-foamable polymer (intermediate connection part) in the middle of the upper and lower connection parts, it is possible to effectively block the thermal crosslinking phenomenon and, in the process of filling the non-expandable polymer liquid, A core layer made of a non-foamable polymer material and a nonmetal layer serving as an intermediate connecting portion are integrally formed, and the airtightness and the bonding property are improved, so that the structural rigidity as well as the heat insulating performance can be sufficiently secured.

Particularly, an intermediate layer including a vacuum insulating material can be formed inside the core layer. The core layer is formed in a structure in which the core layer is hermetically bonded in the box space and is wrapped around the vacuum insulation material uniformly. So that the structural rigidity is maintained more firmly.

In the heat insulating structural member of the present invention, the upper structure is an airtight structure covered with a metal material that can prevent leakage of the cryogenic liquefied gas, and the structural performance is very excellent due to the tight bonding structure. When the non-expandable polyurethane is used as the non-expandable polymer, the core layer has a density of about 900 kg / m < 3 >, an elastic modulus larger than 200 MPa, It is possible to maintain the heat insulation performance without deteriorating the heat insulation performance even when using for a long period of time because the vacuum insulator is wrapped around the periphery of the vacuum insulation material.

Furthermore, it is possible to further insulate the heat bridging phenomenon by further inserting a heat insulating material inside the nonmetal layer (intermediate connecting portion).

3) When the structural movement or load of the storage tank is very large, the connection structure of the connector of the insulating material of the present invention can significantly improve the structural performance as well as the stress applied to the thermal insulating material for the cryogenic tank.

In other words, the connection structure of the connector not only disperses the load applied to the heat insulating structural material for the cryogenic tank, but also acts on the metal box and the core layer and the intermediate layer in the same manner with respect to the load. Thus, the structural performance is significantly improved and the peeling phenomenon is effectively prevented And the structural performance can be significantly improved even in the local buckling phenomenon. Generally, the foamable polymer has a bonding strength of several tens of microns due to internal bubbles and the like, but the bonding strength of the non-foamable polymer can be up to several MPa, so that even a connector having a small area has a great effect of preventing peeling.

4) In the heat insulating structural member of the present invention, the connector may be disposed before the liquid non-foamable polymer is injected. Since the liquid non-foamable polymer of the core layer is cured and bonded over the entire surface of the connector, And can have a wedge shape and the like, and the bonding area is increased by at least 2 to 3 times as much as the planar visible area, thereby forming a structure that holds the core layer structurally firmly, and the durability and bonding property are remarkably improved do.

5) Since the LPG carrier cargo hold adopting the insulation material of the present invention is a method of directly installing on the hull rather than the independent tank insertion method, it is possible to eliminate a huge square space generated between the existing independent tank and the hull, .

In this embodiment, there is no square space, and the thickness of the conventional foamed polymer construction (about 120 mm) and the thickness of the insulation protection material are thinned, thereby enabling a great additional tank space.

In the case of maintaining the existing linearity, the overall size (width, length, height, etc.) of the hull is greatly reduced when the hold volume increases by about 20 ~ 25% or the existing hold size (DWT 84K) It can be expected to reduce the fuel consumption by 10 ~ 20% due to the weight reduction of ships and linearity factor of 5 ~ 10%.

6) Fire hazard can be fundamentally solved in the production of an LNG or LPG carrier cargo hold using the insulating material of the present invention.

The non-foamable polymer material is superior to the foamable polymer material in terms of fire resistance and fire resistance. In particular, since the polymer itself is sealed in the box space (the inner space formed by the upper and lower plates and connection portions) do.

7) The heat insulating structural material of the present invention is also excellent in fire resistance. That is, it has a considerable self-refractory performance even without a separate fireproof coating or heat insulating material.

The non-foamable polymer injected into the closed metal box is of such a degree that localized carbonization occurs on the surface even when exposed to high temperature for a long time due to the airtight structure. However, since the non-foamable polymer has a high thermal conductivity, it is difficult to maintain the opposite temperature at about 110 to 180 DEG C, which is a standard fire resistance performance standard, without a separate refractory coating or heat insulating material.

According to the present invention, even if the covering of the vacuum insulating material is deformed or broken by high temperature, the core layer of the non-expandable polymer hermetically protects the vacuum insulating material, so that the heat insulating performance of the vacuum insulating material is maintained.

Therefore, since the opposite temperature is satisfied within the reference value of the refractory performance for a considerable time, it has a considerable self-refractory performance even without a separate refractory coating or heat insulating material.

8) The heat insulating structural material of the present invention is very useful in terms of vibration and noise reduction. Since the core layer is composed of a material that is more flexible than metal or concrete, it has a considerable damping effect.

In addition, the vacuum structure inside the vacuum insulation material is superior in vibration and noise reduction.

The above 7) and 8) have remarkably excellent effects in terms of workability, space utilization, and habitability when used as a wall or floor material of a residence area or a building of a ship.

9) The simplification of the structure of the LNG or LPG carrier cargo hold with the heat insulating structural material of the present invention makes it possible to reduce enormous production time and material cost.

In the case of the conventional independent tank inserting method, the independent tank itself is required to have a considerable structure construction, and the ship structure supporting the independent tank is required to have a huge construction. However, in the present invention, since one hull structure is used, Instead of providing an inner hull in the cell (shell), a simple structure in which the heat insulating structural material is directly applied to the side cell or the like has a great effect of reducing the production cost.

10) In the case of manufacturing the LPG carrier cargo hold using the heat insulating structural material of the present invention, the use of the special low-temperature steel plate is reduced, and the manufacturing cost is greatly reduced.

Since the LPG tank temperature is normally maintained at minus 50 ° C to 55 ° C, the entire independent tank must be manufactured using a special low-temperature steel that is higher than ordinary steel plates.

In the case of the present invention, a special low-temperature steel should be used for the top plate in contact with the liquefied gas. However, since the bottom plate not in contact with the liquefied gas can use a general steel plate, In the case of the present invention, only the special low-temperature steel plate 6T and the general steel plate 6T are required when the thickness of the conventional independent tank structure is 12T in thickness.

11) The entire production period of LNG or LPG cargo holds is shortened.

In the case of the conventional independent tank inserting method, it takes a long time because a lot of personnel are required to go through many difficult processes and there are many difficult operations in terms of transportation and mounting. However, since the present invention innovatively improves the construction method, the entire production period can be greatly shortened.

12) A vacuum insulation material is installed between the upper plate and the core layer of the metal material in direct contact with the cryogenic liquefied gas, and the vacuum insulation material is further provided with a vacuum insulation material surface protection material, a reinforcing insulation material, a slip material, The brittle fracture phenomenon at extremely low temperatures can be effectively prevented by keeping the internal temperature of the heat insulating structure at the allowable temperature (about -30 캜 to -70 캜) or more of the core layer.

13) An intermediate layer is provided between a top plate made of a metal material and a core layer made of a non-foamable polymer material, which are in direct contact with the cryogenic liquefied gas. The intermediate layer is made of a vacuum insulation material, By inducing a slip phenomenon between the top plate and the middle layer, the thermal stress caused by the difference in thermal expansion coefficient between the top plate and the core layer is significantly reduced or the thermal stress is effectively prevented from being transferred to the inside of the heat insulating structure, It is possible to effectively prevent breakage of the welded portion.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view for explaining a thermal bridge phenomenon of a composite laminated structural member; FIG.
2 is a perspective view illustrating a heat insulating structural member according to a first embodiment of the present invention.
Fig. 3 is a longitudinal sectional view of Fig.
4 is a longitudinal sectional view showing a heat insulating structural member according to a second embodiment of the present invention
5 to 7 are longitudinal sectional views showing the installation of the intermediate layer in the heat insulating structural member according to the first embodiment of the present invention
Figs. 8 to 10 are views in which the intermediate layer has a basic constitution of a vacuum insulation material, and further a vacuum insulation panel surface protection material, a slip material, and a reinforcing insulation material are installed on the vacuum insulation panel
11 is a view showing a state in which a connector is installed between a top plate and a bottom plate
12 is a view showing a state in which a lightweight shaped body is installed inside a core layer
13 is a perspective view showing a heat insulating structural member according to a third embodiment of the present invention.
Fig. 14 is a longitudinal sectional view showing the heat insulating structural member of Fig. 13
15 to 26 are views for explaining the construction of a heat insulating structural member having a connection portion of a filler stepped structure
27 and 28 are longitudinal sectional views showing a heat insulating structural member according to a fourth embodiment of the present invention
29 and 30 are longitudinal sectional views showing a heat insulating structural member according to a fifth embodiment of the present invention
31 is a perspective view showing a heat insulating structural member according to a sixth embodiment of the present invention.
32 is a longitudinal sectional view showing a heat insulating structural member according to a sixth embodiment of the present invention
33 is a longitudinal sectional view showing a heat insulating structural member according to a seventh embodiment of the present invention
34 is a longitudinal sectional view showing a heat insulating structural member according to an eighth embodiment of the present invention
35 is a longitudinal sectional view showing a heat insulating structural member according to a ninth embodiment of the present invention

Throughout this specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

In addition, the thickness and the shape of the heat insulating structural member shown in the drawings are only for easy explanation of the technique of the present invention, and are not limited to those shown in the drawings.

And terms such as upper, lower and the like are arbitrary terms for distinguishing one component from another for convenience of description, and these terms may be changed in reverse or changed to another term depending on the position and direction of view. Of course.

Hereinafter, the heat insulating structural member of the present invention will be described in detail with reference to the accompanying drawings.

The insulating material of the present invention comprises a lower plate (10); An upper plate 20 disposed above the lower plate 10 at a predetermined distance from the lower plate 10; An intermediate layer (50) comprising a heat insulating material disposed between the bottom plate (10) and the top plate (20); A connection part formed at the end of the lower plate 10 and the upper plate 20 and composed of a mixture of a metal layer and a nonmetal layer; A core layer 40 injected into the box space formed by the lower plate 10, the upper plate 20, the intermediate layer 50, and the connection portion; .

The non-expandable polymer of this embodiment includes non-expandable polyurethane.

The connection part serves as a rim, and it can play a role of strengthening the structural fastening between the member or the heat insulating structural member connected to each heat insulating structural member in order to prevent the thermal bridging and to secure the structural fastening.

The connecting portion may be formed separately from the upper and lower plates 20 and 10, but may be integrally formed or a part thereof.

The width of the connecting part can be set to 20 mm or more and 300 mm or less, and the thermal conductivity of the heat insulating material can be set to 0.01 W / mK or less for high performance thermal insulating material.

The core layer 40 acts to transfer a shearing force between the upper and lower plates 20 and 10.

The core layer 40 includes a material, for example, a non-expandable polymer, which is bonded to the upper and lower plates 20 and 10 with sufficient strength and has sufficient mechanical properties against a predicted shear force in use.

Examples of the non-foamable polymer include polyurethane, epoxy resin, phenol resin, unsaturated polyester, vinyl ester, natural rubber and synthetic rubber, and preferably polyurethane materials can be used.

The bonding strength between the core layer 40 and the upper and lower plates 20 and 10 should be greater than 3 MPa, preferably greater than 6 MPa. For low load applications, such as floor panels, where typical use and occupancy load is on the order of 1.4 to 7.2 quadrature, the bond strength is lowered to, for example, about 0.5 MPa .

The density of the core layer 40 is preferably 900 kg / m 3 or more, and more preferably 900 to 1900 kg / m 3 or more.

The modulus of elasticity of the core layer may be 200 MPa or more, and preferably 300 MPa or more.

The heat insulating structural member of the present invention includes a panel type (see FIGS. 2 to 32) in which one of the upper plates is disposed on one of the lower plates and the adjacent heat insulating structural members are connected to each other, And an overlay type (see Figs. 33 and 34) in which a plurality of top plates are arranged and configured in a lattice structure.

The panel type can be applied to a method of constructing a unit of insulation or a module of a certain size and assembling at a construction site while an overlay type is a construction type of a construction site The present invention can be applied to a method of directly constructing and constructing an image.

The present invention is not limited to the panel type and the overlay type, but may also be a mixed type in which they are mixed.

In the panel type of the present invention, the heat insulating structural member can be classified as follows according to the shape of the connection portion.

(See FIG. 2 and FIG. 3) to which the connection part of the block laminate structure is applied (see FIGS. 2 and 3), the insulating material 200 (see FIG. 4) to which the connection part of the filler laminate structure is applied (See Figs. 27 and 28), (4) a heat insulating structural member 400 (see Figs. 13 to 26), (4) a heat insulating structural member 400 (See FIGS. 29 and 30), and (6) a heat insulating structural member 600 (see FIGS. 31 and 32) to which a connecting portion of a bolt fastening structure is applied.

Hereinafter, the heat insulating structural member 100 (first embodiment) to which the connecting portion of the block laminate structure is applied will be described in detail with reference to FIG. 2 and FIG.

FIG. 2 is a perspective view showing a heat insulating structural member 100 according to a first embodiment of the present invention, and FIG. 3 is a longitudinal sectional view of FIG.

A heat insulating structural member (100) according to a first embodiment of the present invention comprises a lower plate (10) made of a metal; An upper plate 20 disposed above the lower plate 10 and having a predetermined space from the lower plate 10 and forming a space S between the upper plate 20 and the lower plate 10; A connection part 130 provided at an end of the bottom plate 10 and the top plate 20; A core layer 40 filled in a liquid phase in a box space formed by the lower plate 10, the upper plate 20, and the connecting portion 130; . Since the core S of the non-foamable polymer or the polyurethane is filled in the space S, the space S is removed after the heat insulating structural member is manufactured.

Since the non-expandable polymer constituting the core layer 40 has a characteristic that the volume of the non-expandable polymer is generally increased in a process of being injected into a liquid phase and then hardened, a process of applying a load to the top plate 20 during the injection process, do. Because of the characteristics of the non-expandable polymer, the present invention has an advantage that the inner space S filled with the core layer 40 is filled with a very tight airtightness.

The lower plate 10 and the upper plate 20 may have a flat structure and may be made of a composite material including a metal material such as SUS, Invar, or the like. An example of a composite material containing metal is a triplex material used in LNG cargo hold, which is a composite material that surrounds a thin aluminum plate surrounded by a glass cloth and resin, and exhibits excellent behavior at extremely low temperatures.

For reference, SUS is the header of Steel, Use, and Stainless, which is used to indicate the specification of stainless steel in Japanese standard JIS.

A plurality of corrugations (not shown) may be formed on the top surface of the top plate 220 in contact with the liquefied gas.

In this embodiment, the connecting portion may fix the heat insulating structural member 100 to the substructure 1 (FIG. 19) or to connect the adjacent heat insulating structural members 100 to each other. The connection unit 130 may include a mixture of a metal layer and a non-metal layer.

For reference, the sub-structure 1 is a cargo hold of a ship, a part of a stand-alone tank body, or a base frame or plate such as an architectural structure. In addition, the form and configuration of the sub-structure 1 are for the purpose of illustrating an example of the present invention, but are not limited thereto.

The shape of the connection portion 130 is not limited to the drawings of the present embodiment and includes a bar or a stick shape or a rectangular frame or a frame member and may be formed of a liquid non-expandable polymer injection And a function of preventing the liquid non-foamable polymer from flowing down during curing.

3 (a), the connection part 130 has the same shape as the lower connection part 131, the upper connection part 132, the lower connection part 131 and the upper connection part 132 made of metal, For example, a non-foamable polymer, which is an intermediate connecting part interposed between and bonded to (adhered to) As such, the connection unit 130 may be formed of a mixture of a metal layer and a non-metal layer.

The lower connecting portion 131, the upper connecting portion 132 and the non-expandable polymer 133 may be integrally joined (or bonded) to each other via a separate manufacturing process (not shown) have.

For example, the lower connection part 131, the upper connection part 132 and the non-foamable polymer (intermediate connection part) 133 are bonded (or bonded) Foamed polymer 133 may be filled and cured to form an integral body of the entire connection part 130. In this case,

3B, the connection unit 130 includes a lower connection unit 131, a metal upper connection unit 132, a lower connection unit 131, and an upper connection unit 132, A non-expandable polymer, for example, a non-metal layer 133 interposed in the form of a "T"

4 is a longitudinal sectional view showing a heat insulating structural member 200 to which a connection portion of a fillet stacking structure is applied.

Referring to FIG. 4, the heat insulating structural member 200 according to the second embodiment of the present invention is the same as the heat insulating structural member 100 according to the first embodiment of the present invention except for the connecting portion. ) Will be described.

In the heat insulating structural member 200 according to the second embodiment of the present invention, the connecting portion 230 includes a nonmetal layer 233, for example, a non-expandable polymer, which is an intermediate connecting portion between the lower connecting portion 231 and the upper connecting portion 232 . In this manner, the connection unit 230 may be formed of a mixture of a metal layer and a non-metal layer.

That is, in the state where the lower connection portion 231 and the upper connection portion 232 are provided on the lower plate 10 and the upper plate 20, respectively, instead of making the non-foamable polymer into a block form as in the first embodiment, The non-foamable polymer layer 233 is formed between the lower connection part 231 and the upper connection part 232 together with the core layer 40 in the process of injecting and curing the liquid non-foamable polymer in order to produce the core layer 40 made of the foamable polymer. ), The thermal bridging phenomenon can be minimized and the heat insulating performance and the structural material performance can be further improved.

5 to 7 are longitudinal sectional views showing the installation of the intermediate layer in the heat insulating structural member 100 according to the first embodiment of the present invention.

In the heat insulating structural member 100 according to the first embodiment of the present invention, a space S is formed between the lower plate 10 and the upper plate 20, and further includes the intermediate layer 50 in the space S The intermediate layer 50 may be provided on the lower side of the upper plate 20 (see FIG. 5), the core layer 40 (see FIG. 6) (Refer to FIG. In Fig. 6, S1 and S2 are spacers or support membranes, which means a member that maintains a constant spacing or supports the intermediate layer 50.

In this case, the thickness of the vacuum insulating material may be about 5 to 25 mm, and the intermediate layer 50 may be provided between the core layer 40 and the top plate 20 to block the cryogenic temperature (-30 DEG C to -70 DEG C) of the core layer (non-expandable polymer material) 40, that is, within the non-expandable polymer operating temperature range, thereby effectively preventing brittle fracture at a very low temperature.

In the present embodiment, at least one of an airgel insulation material or a slim organic or inorganic insulation material is used in place of the vacuum insulation material, and an atypical type insulation material (gas, liquid, gel type ). ≪ / RTI >

The thermal conductivity of the vacuum insulation material (W / m · K, based on 20 ° C) should be 0.0045 or less. The airgel insulation is made of Aspen aerogels, Thermablock, etc., and the thermal conductivity (W / m · K, based on 20 ℃) is 0.015 or less.

The structure of the vacuum insulation material includes a core material and a sheath material for vacuum packing the core material, and includes a metal foil between the core material and the sheath material, and the metal foil includes an aluminum foil. Since the structure of the vacuum insulator corresponds to the known technique disclosed in the foregoing, a detailed description thereof will be omitted.

Although not shown in the drawings, in the present embodiment, a core layer 40 is provided between the upper and lower plates 20 and 10, and a vacuum heat insulator 50 is provided inside the core layer 40, And the entirety of the core layer 40 may be exposed on the side of the heat insulating structural member (rim portion).

The core layer 40, which is a non-foamable polymer material, covers and protects the entire surface of the vacuum insulator 50 in the configuration in which the entire side surface of the core layer 40 is exposed to the side of the heat insulating structural member, Since the compression load of the core layer 40 generated during the curing process of the core layer 40 is effectively dispersed, the damage of the vacuum insulation material can be effectively prevented, and both the heat insulation performance and the structural material performance can be improved.

5, the intermediate layer 50 includes a vacuum insulation material. When the intermediate layer 50 is provided below the upper plate 20, the intermediate layer 50 is slippery with the upper plate 20 Can be installed.

The core layer 40 protects the vacuum insulation from external impacts, and a liquid non-foamable polymer is injected and cured into the space S to adhere to the inner surface of the space in an airtight manner to maintain the structural rigidity.

8 to 10, the intermediate layer 50 has a vacuum insulator 51 as a basic constitution. The vacuum insulator 51 includes a vacuum insulator surface protection material 52, a slip material 53, a reinforcing insulation material 54). ≪ / RTI >

The density of vacuum insulation is about 150 ~ 300㎏ / ㎥, which is higher density than other foam insulation and has a strong resistance to compressive load. However, if scratches are generated in the coating and minute holes are formed or torn, the heat insulating performance is remarkably deteriorated.

In this embodiment, when the upper plate 20 and the lower plate 10 are formed of a metal plate in consideration of such a disadvantage of the vacuum insulating material, the surface of the top plate 20, which is a metal plate, In order to solve such a problem, the vacuum insulator 51 may be covered with the vacuum insulator surface protection material 52 on the vacuum insulator 51, . The vacuum insulator surface protection material 52 may serve to protect the top surface coating of the vacuum insulator 51 in the form of a film.

The vacuum insulating material is installed between the core layer 40 and the upper plate 20 to have a heat insulating property and the vacuum insulating material surface protecting material 52 is provided between the vacuum insulating material and the top plate 20 to prevent the coating damage of the vacuum insulating material. And the slip material 53 can enable the slip with the top plate 20. [

The slip material 53 may serve to induce a more smooth slip of the intermediate layer 50, and may be in the form of a corrugated cardboard paper, a synthetic resin sheet, or the like.

The slip material 53 preferably has a smooth surface. As the surface becomes smoother, the slip phenomenon is more smoothly induced at a cryogenic temperature, and the thermal stress and the thermal stress generated by the difference in thermal expansion coefficient between the top plate 20 of the metal material and the core layer 40, The brittle fracture phenomenon of the core layer 40 at a very low temperature can be effectively prevented.

Since the top plate 20 made of a metal and the core layer 40 made of a polyurethane material have different thermal expansion coefficients, thermal stresses may be generated due to different thermal expansion coefficients.

For reference, thermal stress refers to the stress generated inside the solid by temperature change. It is known that the thermal expansion coefficient of the core layer 40 made of a polyurethane material is about 4 to 10 times larger than that of the top plate 20 made of a metal material. Such a thermal expansion coefficient causes a thermal stress, there is a problem.

In consideration of such a problem, in the present embodiment, the thermal stress that may be caused by the difference in thermal expansion coefficient can be largely reduced through simple structural modification by adding the slipable intermediate layer 50, and the brittle fracture phenomenon at a very low temperature can be effectively prevented.

The upper surface of the intermediate layer 50 can be slidably contacted with the lower surface of the upper plate 20 and the lower surface of the intermediate layer 50 can be joined to the core layer 40.

The core layer 40 is completely bonded to the box space formed by the bottom plate 10 and the top plate 20 and the connecting portion 130 and the core layer 40 is tightly sealed to cover the entire surface of the vacuum insulation material So that the compressive load of the core layer 40 can be effectively dispersed, and the core layer 40 is brought into close contact with the core layer 40, so that the function as a structural member can be sufficiently exhibited.

The core layer 40 is bonded to the lower plate 10 and the lower layer 10 is bonded to the upper layer 20 and the lower layer 10. The core layer 40 is bonded to the upper layer 20, the connecting portion 130, the core layer (non-expandable polymer material) 40, Tightly or liquid-tightly to the inner surface of the box space formed by the connecting portion 130 and the intermediate layer 50. [

Since the core layer 40 can be bonded (or adhered) to the inner surface of the box space in tight contact with airtightness or liquid tightness during the curing process, the core layer 40 can be firmly coupled without using any adhesive.

The lower connection part 131 and the upper connection part 132 of the connection part 130 may be fixed to the lower plate 10 and the upper plate 20 by welding or bolting.

The intermediate layer 50 and the top plate 20 do not use an adhesive and can maintain a slip contact state.

The slip action between the top plate 20 and the bottom plate structure is important in order to greatly reduce the thermal stress and to prevent the transmission of the slip material 53. In order to more smoothly induce the slip action,

Also, although not shown in the drawing, in order to satisfy the insulation design standard value, when one piece of vacuum insulation material lacks the heat insulation performance, other reinforcing insulation materials may be disposed together with the vacuum insulation material to satisfy the design standard.

Further, although not shown in the drawings, in the case of a significant external impact, an impact modifier (not shown) for absorbing the impact energy transmitted to the vacuum insulator may be further disposed.

As shown in FIG. 11, a connector 70 may be provided between the top plate 20 and the bottom plate 10.

The upper plate 20 and the core layer 40 are connected with a strong force of 3 MPa or more by the connection structure of the connector 70 so that the load applied to the heat insulating structural member 100 is uniformly dispersed, Since the upper and lower plates 20 and 10 and the core layer 40 all behave in the same direction, the peeling phenomenon can be effectively prevented and the structural performance is significantly improved.

The upper end of the connector 70 may be fixed to the upper plate 20 and the lower end of the connector 70 may be fixed to the core layer 40 as shown in Fig.

That is, the web 71 of the connector 70 is located through the clearance (through hole) of the intermediate layer 50, and the flange 72 of the connector 70 is located inside the core layer 40 Can be fixed.

As shown in Fig. 11 (b), both ends of the connector 70 can be fixed to the core layer 40. Fig. That is, the web 71 of the connector 70 is located through the clearance (through hole) of the intermediate layer 50, and both flanges 72 of the connector 70 are positioned on the core layer 40, .

The mounting position and shape of the connector are not limited to this embodiment, and can be variously changed.

The connector 70 is preferably made of a material having a low thermal conductivity so that the heat transfer is not performed through the connector 70. It is preferable that the surface of the connector 70 is coated with a heat insulating material.

As shown in FIG. 12, the lightweight body 80 may be provided inside the core layer 40. The lightweight body 80 may be a bubble core such as a table tennis ball (sphere).

The lightweight bodies 80 may be disposed adjacent to each other or at regular intervals. The material of the lightweight molded body 80 is preferably made of a non-foamable polymer material or an affinity (good bonding or bonding property) material for tight bonding with the core layer 40, but is not limited thereto.

Since the lightweight molded body 80 is formed inside the core layer 40, the total weight can be reduced accordingly, and the lightweight molded body can be made lightweight, and the lightweight molded body 80 is densely arranged in the space, Rigidity and insulation performance can be further enhanced.

FIG. 13 is a perspective view illustrating a heat insulating structural member 300 to which a connection portion of a block stepped structure is applied, and FIG. 14 is a longitudinal sectional view illustrating the heat insulating structural member 300 of FIG.

13 and 14, a heat insulating structural member 300 according to a third embodiment of the present invention includes a lower plate 10 made of a metal; An upper plate 20 disposed above the lower plate 10 and having a predetermined space from the lower plate 10 and forming a space S between the upper plate 20 and the lower plate 10; A connection part 330 formed at the end of the lower plate 10 and the upper plate 20 for preventing thermal bridge phenomenon and for structural fastening and composed of a mixture of a metal layer and a nonmetal layer; And a core layer 40 filled with a non-expandable polymer which is injected and cured in a liquid state in a space formed by the lower plate 10, the upper plate 20, and the connecting portion 330.

The connection portion 330 includes a lower connection portion 331 made of metal and fixed to the lower plate 10 and a lower portion 331 fixed to the upper plate 20 and having a lower portion 331, A non-foamable polymer layer 333, for example, a non-foamable polymer, is interposed between the lower connection part 331 and the upper connection part 332, . In this manner, the connection part 330 may be formed of a mixture of a metal layer and a non-metal layer.

The non-foamable polymer 333 may be integrally formed with the core layer 40 in the curing process of the core layer 40 made of a non-foamable polymer material.

A metal plate 341 may be formed on the upper portion of the closing member 340 and a non-expandable polymer block 342 may be formed on the lower surface of the metal plate 341. The metal plate 341 may be welded to the upper connection portion 332, Or the like.

In this embodiment, the joining method or the fixing method is not limited to the welding or bolting method, and other joining methods may be adopted depending on the design conditions and construction method.

15 to 26 are diagrams for explaining the construction of the heat insulating structural member 300 having a connecting portion of a block stepped structure. The heat insulating structural member 300 according to the third embodiment of the present invention includes a lower plate 10 made of metal, The lower connection portion 331 can be fixed to the upper edge portion of the upper portion by welding or bolting. Next, a plurality of spacers S1 are appropriately arranged on the upper surface of the lower plate 10, and an intermediate layer (for example, vacuum insulator) 50 is disposed on the spacers S1.

At this time, the lower plate 10 and the vacuum insulator 50 are spaced from each other by the spacer S1 to form a space therebetween. Next, a plurality of spacers S2 are placed on the upper surface of the vacuum insulator 50, and the upper plate 20 is placed on the spacers S2. An upper connection portion 332 is provided at a rim portion of the top plate 20.

The liquid non-foamable polymer is injected and cured to form the core layer 40 in the space between the lower plate 10 and the upper plate 20 and the intermediate connection portion 332 is also connected between the lower connection portion 331 and the upper connection portion 332. [ To form a negative non-metallic layer 333, for example, a non-foamable polymer.

The vacuum insulation may be composed of an outer foil and an inner filling material (such as fumed silica or glass wool) and is configured to maintain a vacuum to prevent air / gas from entering. In particular, fumed silica is composed of nonflammable materials because it is similar to sand particles, and glass wool is also a material that can be used as a refractory material.

The heat insulating structural member 300 of the present invention is formed in a block stepped structure that is disposed on a substructure 1 (see FIG. 19) and disposed in proximity to each other, and between the adjacent heat insulating structural members 300, And is fixedly installed.

The closure members 340 and 350 may have a metal plate 341 formed thereon and a non-expandable polymer block 342 formed on the lower surface of the metal plate 341. It is preferable that the metal plate 341 has the same thickness as the top plate 20 and the top surface is flat. Although not shown in the drawing, the non-expandable polymer block 342 may be formed by injection curing a liquid non-expandable polymer, not a block type. That is, the non-expandable polymer liquid can be injected and cured in a space formed under the metal plate 341.

In this embodiment, the closure members 340, 350 include a cruciform closure member 340 (see Figs. 22, 23, 24) installed near a vertex at which four heat insulating structural members are gathered; And a straight closing member 350 (see Fig. 25) provided near the corner where the two pieces of the heat insulating structural members are close to each other.

In the present embodiment, the sub-structure 1 is a cargo hold of a ship, a part of a stand-alone tank body, or a base frame or plate such as an architectural structure. In addition, the form and configuration of the sub-structure 1 are for the purpose of illustrating an example of the present invention, but are not limited thereto.

The heat insulating structural member assembly of the present invention can be applied in various fields such as an insulation system of a cargo hold of a ship, a freezing warehouse, a building structure, or the like in which a structural member function and an insulation function must be simultaneously performed.

The insulating structure member 300 is disposed adjacent to the substructure 1 and then the bolts B are fastened in the bolt holes 331a to form the heat insulating structural member 300 ). At this time, a gap is formed between the lower plate 10 and the lower plate 10, and the gap is filled with the sealant 2 (refer to FIG. 22). And the finishing members 340 and 350 are fixedly installed between the heat insulating structural members 300. The metal plate 341 of the closing member may be bolted to the upper connection portion 332 or fixedly installed by welding or the like.

Although not shown in the drawing, the construction of the heat insulating structural member 300 according to the third embodiment of the present invention may also include the intermediate layer, the connector, and the lightweight body disclosed in the first embodiment of the present invention.

FIG. 27 is a view for explaining the manufacture of the heat insulating structural member 400 using the connecting part of the filling stepped structure, and FIG. 28 is a longitudinal sectional view showing the heat insulating structural material 400 using the connecting part of the filling stepped structure.

27 and 28, the heat insulating structural member 400 according to the fourth embodiment of the present invention is characterized in that a lower connection portion 431 is formed at the upper edge of the lower plate 10, A lower spacer S1 is provided on an upper surface of the lower plate 10 and a lower spacer 10 is spaced apart from the lower plate 10 by a lower spacer S1.

An upper spacer S2 is provided on the upper surface of the intermediate layer 50 and an upper connection portion 432 is formed on the lower edge of the upper plate 20 by a predetermined distance from the intermediate layer 50 by the upper spacer S2 .

The gap between the lower connecting portion 431 and the upper connecting portion 432 is blocked by using the temporary blocking member 170 and the gap between the lower plate 10 and the upper connecting portion 432 is reduced through the perforation (hole for injecting the liquid non- The liquid non-foamable polymer is injected into the upper space formed between the plates 20 and cured to form the core layer 40. The temporary blocking member 170 is preferably made of a material that does not adhere well to the liquid polyurethane, for example, Teflon.

At this time, a non-metal layer 433, for example, a non-foamable polymer, which is an intermediate connecting portion, is formed between the lower connection portion 431 and the upper connection portion 432. In this way, the connection part 430 may be formed of a mixture of a metal layer and a non-metal layer.

The lower connection portion 431 and the upper connection portion 432 are formed in the process of forming the core layer 40 by injecting and curing the liquid non-foamable polymer in the heat insulating structural member 400 using the connection portion 430 of the filling stepped structure, Metal layer 433 is formed between the core layer 40 and the non-metal layer 433, and the core layer 40 and the non-metal layer 433 are integrally formed together.

By forming the nonmetal layer 433 together with the core layer 40 as described above, thermal crosslinking can be minimized and the heat insulating performance and structural performance can be further improved.

28 (a), the metal plate 441 of the closure member 440 is joined to the upper portion 440 of the closure member 440 in the joining structure of the closure member 440, And can be welded to the connection portion 432.

The metal plate 441 of the closing member 440 can be fastened to the upper connecting portion 432 with bolts B as shown in FIG. 28 (b).

In this embodiment, the joining method or the fixing method is not limited to the welding or bolting method, and other joining methods may be adopted depending on the design conditions and construction method.

29 and 30 are vertical cross-sectional views showing a heat insulating structural member 500 to which a connection portion of a filled-up type structure is applied.

29 and 30, a heat insulating structural member 500 according to a fifth embodiment of the present invention includes a lower plate 10 made of a metal; An upper plate 20 disposed above the lower plate 10 and having a predetermined space from the lower plate 10 and forming a space S between the upper plate 20 and the lower plate 10; A connection part 530 provided at the end of the lower plate 10 and the upper plate 20 for preventing thermal bridging and for structural fastening and composed of a mixture of a metal layer and a nonmetal layer; And a core layer 40 filled with a non-expandable polymer that is injected and cured in a liquid state in a space formed by the lower plate 10, the upper plate 20, and the connecting portion 530.

The connecting portion 530 is detachably coupled to the top plate 20 and injects and cures a liquid non-foamable polymer into a space between the upper connecting portion 532 and the lower connecting portion 531 to form a nonmetallic layer 533, For example, a non-foamable polymer may be integrally formed with the core layer 40, and may have a finned structure in which the adjacent heat insulating structural members 500 are connected to each other. In this manner, the connection portion 530 may be formed of a mixture of a metal layer and a non-metal layer.

In other words, both ends of the upper connection part 532 are inserted into the coupling groove 41 of the core layer 40 and the liquid is injected into the space between the upper connection part 532 and the lower connection part 531, The heat insulating structural member 500 can be manufactured by curing. A filling material 2 such as a glass wool may be provided between the lower connection portions 531.

The liquid non-foamable polymer is airtightly joined in the space between the upper connection portion 532 and the lower connection portion 531 in the injection hardening process and the core layer 40 and the nonmetal layer 533 are integrally joined, Can be effectively prevented, insulation performance and structural performance can be further improved, productivity can be improved by simplifying construction work.

FIG. 31 is a perspective view showing a heat insulating structural member of a bolt fastening type, and FIG. 32 is a longitudinal sectional view showing a bolt fastening type heat insulating structural member.

31 and 32, a heat insulating structural member 600 according to a sixth embodiment of the present invention includes a lower plate 10 made of a metal; An upper plate 20 disposed above the lower plate 10 and having a predetermined space from the lower plate 10 and forming a space S between the upper plate 20 and the lower plate 10; A connection part 630 formed at the end of the lower plate 10 and the upper plate 20 for preventing thermal bridging and for structural fastening and composed of a mixture of a metal layer and a nonmetal layer; And a core layer 40 filled with a non-expandable polymer that is injected and cured in a liquid phase in a space formed by the lower plate 10, the upper plate 20, and the connecting portion 630.

A plurality of fastening holes H penetrating the lower plate 10 and the upper plate 20 are formed at the edges of the lower plate 10 and the upper plate 20 in the connecting portion 630 of the present embodiment, The connection portion 630 may be configured to be coupled into the fastening hole H so as to be installed in the substructure 1. [ That is, the bolt 631 is inserted into the fastening hole H, and the nut 632 is fastened to the end of the bolt 631, so that the heat insulating structural member 600 is fixed to the substructure 1.

In the present embodiment, the bonding strength (adhesion) between the core layer 40 (non-expandable polymer material) and the inner surface of the metal plate (upper or lower plate or connection portion) surrounding the core layer 40 Is in the range of 3 MPa to 15 MPa.

The bonding strength of the core layer 40 is limited because the non-foamable polymer heat insulating structural member is formed integrally with a metal box (a box formed by the upper and lower plates and the connecting portion) surrounding the core layer 40 In order to fulfill its role as a structural material.

The metal box and the core layer 40 must be bonded (adhered) to each other with the bonding strength as described above to realize a function as a structural member which can be used in a main member of a ship which receives considerable combined loads.

That is, in order to realize the function of the structural member by the adhesive force between the core layer 40 of the non-foamable polymer and the metal box, the core layer 40 of the non-foamable polymer material and the upper and lower plates 20, So that the core layer 40 and the vacuum insulator 50 are integrated so that they can cope with various complex loads similarly to a single structure.

33 and 34 are views showing an overlay type in which a plurality of top plates are arranged on one lower plate to have a lattice structure.

Hereinafter, an overlay type heat insulating structural member will be described as an example, but the present invention is not limited to the drawings, and the same can be applied to the panel type as described above.

33 is a longitudinal sectional view showing a heat insulating structural member 700 according to a seventh embodiment of the present invention, in which a plurality of top plates 20 are arranged on one lower plate 10, , And can be used when a liquid non-foamable polymer needs to be separately injected for construction.

A mixture of the metal layers 731 and 732 and the nonmetal layer 733 at the end portions of the metal lower plate 10 and the upper plate 20 of metal in such a manner that a plurality of component parts are laminated on one lower metal plate 10 And a core layer 40 may be formed between the lower plate 10 and the upper plate 20. [

The core layer 40 may include an intermediate layer 50, for example, a vacuum insulation material.

The lower spacer S1 and the upper spacer S2 serve to support the intermediate layer 50 and maintain a constant distance from the lower plate 10 and the upper plate 20. [

34 is a longitudinal sectional view showing a heat insulating structural member 800 according to an eighth embodiment of the present invention. In the heat insulating structural member 800, a lower connection portion 831 is formed on an upper surface rim of a lower plate 10, The lower spacer S1 is provided on the upper surface of the lower plate 10 and the intermediate layer 50 is mounted on the lower plate 10 with a predetermined distance therebetween by the lower spacer S1.

An upper spacer S2 is provided on the upper surface of the intermediate layer 50 and an upper connection portion 832 is formed on the lower edge of the upper plate 20 while maintaining a predetermined distance from the intermediate layer 50 by the upper spacer S2 .

The gap between the lower connection part 831 and the upper connection part 832 is cut off and the space between the lower plate 10 and the upper plate 20 is formed through a hole (hole for injecting the liquid non-expandable polymer: not shown) A liquid non-foamable polymer is injected and cured to form the core layer 40. [ At this time, a nonmetal layer 833, for example, a non-foamable polymer, which is an intermediate connection part, is formed between the lower connection part 831 and the upper connection part 832. In this way, the connection portion 830 may be formed of a mixture of a metal layer and a non-metal layer.

A non-foamable polymer 833, which is an intermediate connecting portion, is formed between the lower connection portion 831 and the upper connection portion 832 in the process of forming the core layer 40 by injecting the liquid non-foamable polymer, By forming the core layer 40 and the nonmetal layer 833 integrally, thermal bridging can be minimized and the heat insulating performance and structural performance can be further improved.

The closing member 840 may be closed between the heat insulating structural members and the metal plate 441 of the closing member 840 may be fastened to the upper connecting portion 432 with the bolts B. [

35 is a longitudinal sectional view showing a heat insulating structural member according to a ninth embodiment of the present invention.

As shown in FIG. 35, when cracks are generated in the plate, for example, the top plate 20, which is in contact with the liquefied gas, depending on the classification agency approving the safety of the ship, In the conventional LPG and LNG membrane systems, a pipe is connected between the gaps between the heat insulating boxes to circulate an inert gas (for example, N ₂ ), and a detection device (not shown) By detecting the concentration of the inert gas in the gas recovery unit, it is confirmed whether or not gas leakage occurs.

In the present embodiment, when the upper plate 20 is cracked and the gas flows as indicated by an arrow, since the core layer 40 has no gaps in the structure, the inert gas circulation pipe The gas tube 850 may be connected to the inert gas circulation pipe 840 and the gas tube 850 may be extended to a region where cracks may occur.

It may be disposed between the intermediate layer 50 and the upper connection portion 832 such that the leakage gas flows into the gas tube 850. There is an advantage that the inert gas can be circulated through the inert gas circulation pipe 840 and the concentration of the inert gas can be confirmed by the gas recovery unit of the detection device (not shown). Here, the detection device corresponds to a well-known technology, and therefore, the illustration thereof is omitted.

It is preferable that a mesh or a filter 860 is formed at the end of the gas tube 850 to prevent the liquid non-expandable polyurethane from flowing into the gas tube 850 during the formation of the core layer 40 .

As described above, the present invention has the following effects.

1) It has a light but very strong structural function. That is, it has the function as an effective composite laminate structure formed of the upper and lower metal plates and the core layer.

It is possible to withstand the enormous in-plane stress that the metal plate disposed on the upper and lower sides can withstand the whole structure and to perform the composite single behavior of the entire structure owing to the role of the non-expandable polymer, which is one of the core layers in the heat insulating structural material. So that the sectional modulus also increases, so that it has a very effective function as a structural member.

In addition, since the non-expandable polymer has a shock-resistant property, the heat insulating structural material of the present invention can effectively absorb an external impact.

2) By forming a nonmetallic layer, for example, a non-foamable polymer (intermediate connection part) in the middle of the upper and lower connection parts, it is possible to effectively block the thermal crosslinking phenomenon and, in the process of filling the non-expandable polymer liquid, A core layer made of a non-foamable polymer material and a nonmetal layer serving as an intermediate connecting portion are integrally formed, and the airtightness and the bonding property are improved, so that the structural rigidity as well as the heat insulating performance can be sufficiently secured.

Particularly, an intermediate layer including a vacuum insulating material can be formed inside the core layer. The core layer is formed in a structure in which the core layer is hermetically bonded in the box space and is wrapped around the vacuum insulation material uniformly. So that the structural rigidity is maintained more firmly.

In the heat insulating structural member of the present invention, the upper structure is an airtight structure covered with a metal material that can prevent leakage of the cryogenic liquefied gas, and the structural performance is very excellent due to the tight bonding structure. When the non-expandable polyurethane is used as the non-expandable polymer, the core layer has a density of about 900 kg / m < 3 >, an elastic modulus larger than 200 MPa, It is possible to maintain the heat insulation performance without deteriorating the heat insulation performance even when using for a long period of time because the vacuum insulator is wrapped around the periphery of the vacuum insulation material.

Furthermore, it is possible to further insulate the heat bridging phenomenon by further inserting a heat insulating material inside the nonmetal layer (intermediate connecting portion).

3) When the structural movement or load of the storage tank is very large, the connection structure of the connector of the insulating material of the present invention can significantly improve the structural performance as well as the stress applied to the thermal insulating material for the cryogenic tank.

In other words, the connection structure of the connector not only disperses the load applied to the heat insulating structural material for the cryogenic tank, but also acts on the metal box and the core layer and the intermediate layer in the same manner with respect to the load. Thus, the structural performance is significantly improved and the peeling phenomenon is effectively prevented And the structural performance can be significantly improved even in the local buckling phenomenon. Generally, the foamable polymer has a bonding strength of several tens of microns due to internal bubbles and the like, but the bonding strength of the non-foamable polymer can be up to several MPa, so that even a connector having a small area has a great effect of preventing peeling.

4) In the heat insulating structural member of the present invention, the connector may be disposed before the liquid non-foamable polymer is injected. Since the liquid non-foamable polymer of the core layer is cured and bonded over the entire surface of the connector, And can have a wedge shape and the like, and the bonding area is increased by at least 2 to 3 times as much as the planar visible area, thereby forming a structure that holds the core layer structurally firmly, and the durability and bonding property are remarkably improved do.

5) Since the LPG or LNG carrier cargo hold adopting the insulation material of the present invention is a method of directly installing on the hull rather than the independent tank insertion method, it is possible to eliminate a huge square space generated between the existing independent tank and the hull, .

In this embodiment, there is no square space, and the thickness of the conventional foamed polymer construction (about 120 mm) and the thickness of the insulation protection material are thinned, thereby enabling a great additional tank space.

In the case of maintaining the existing linearity, the overall size (width, length, height, etc.) of the hull is greatly reduced when the hold volume increases by about 20 ~ 25% or the existing hold size (DWT 84K) It can be expected to reduce the fuel consumption by 10 ~ 20% due to the weight reduction of ships and linearity factor of 5 ~ 10%.

6) Fire hazard can be fundamentally solved in the production of an LPG or LNG carrier cargo hold with the insulation material of the present invention.

The non-foamable polymer material is superior to the foamable polymer material in terms of fire resistance and fire resistance. In particular, since the polymer itself is sealed in the box space (the inner space formed by the upper and lower plates and connection portions) do.

7) The heat insulating structural material of the present invention is also excellent in fire resistance. That is, it has a considerable self-refractory performance even without a separate fireproof coating or heat insulating material.

The non-foamable polymer injected into the closed metal box is of such a degree that localized carbonization occurs on the surface even when exposed to high temperature for a long time due to the airtight structure. However, since the non-foamable polymer has a high thermal conductivity, it is difficult to maintain the opposite temperature at about 110 to 180 DEG C, which is a standard fire resistance performance standard, without a separate refractory coating or heat insulating material.

According to the present invention, even if the covering of the vacuum insulating material is deformed or broken by high temperature, the core layer of the non-expandable polymer hermetically protects the vacuum insulating material, so that the heat insulating performance of the vacuum insulating material is maintained.

Therefore, since the opposite temperature is satisfied within the reference value of the refractory performance for a considerable time, it has a considerable self-refractory performance even without a separate refractory coating or heat insulating material.

8) The heat insulating structural material of the present invention is very useful in terms of vibration and noise reduction. Since the core layer is composed of a material that is more flexible than metal or concrete, it has a considerable damping effect.

In addition, the vacuum structure inside the vacuum insulation material is superior in vibration and noise reduction.

The above 7) and 8) have remarkably excellent effects in terms of workability, space utilization, and habitability when used as a wall or floor material of a residence area or a building of a ship.

9) The simplification of the structure of the LPG or LNG carrier cargo hold employing the insulating material of the present invention makes it possible to reduce the production cost and material cost enormously.

In the case of the conventional independent tank inserting method, the independent tank itself is required to have a considerable structure construction, and the ship structure supporting the independent tank is required to have a huge construction. However, in the present invention, since one hull structure is used, Instead of providing an inner hull in the cell (shell), a simple structure in which the heat insulating structural material is directly applied to the side cell or the like has a great effect of reducing the production cost.

10) In the case of manufacturing the LPG carrier cargo hold using the heat insulating structural material of the present invention, the use of the special low-temperature steel plate is reduced, and the manufacturing cost is greatly reduced.

Since the LPG tank temperature is normally maintained at minus 50 ° C to 55 ° C, the entire independent tank must be manufactured using a special low-temperature steel that is higher than ordinary steel plates.

In the case of the present invention, a special low-temperature steel should be used for the top plate in contact with the liquefied gas. However, since the bottom plate not in contact with the liquefied gas can use a general steel plate, In the case of the present invention, only the special low-temperature steel plate 6T and the general steel plate 6T are required when the thickness of the conventional independent tank structure is 12T in thickness.

11) The entire production period of LNG or LPG cargo holds is shortened.

In the case of the conventional independent tank inserting method, it takes a long time because a lot of personnel are required to go through many difficult processes and there are many difficult operations in terms of transportation and mounting. However, since the present invention innovatively improves the construction method, the entire production period can be greatly shortened.

12) A vacuum insulation material is installed between the upper plate and the core layer of the metal material in direct contact with the cryogenic liquefied gas, and the vacuum insulation material is further provided with a vacuum insulation material surface protection material, a reinforcing insulation material, a slip material, The brittle fracture phenomenon at extremely low temperatures can be effectively prevented by keeping the internal temperature of the heat insulating structure at the allowable temperature (about -30 캜 to -70 캜) or more of the core layer.

13) An intermediate layer is provided between a top plate made of a metal material and a core layer made of a non-foamable polymer material, which are in direct contact with the cryogenic liquefied gas. The intermediate layer is made of a vacuum insulation material, By inducing a slip phenomenon between the top plate and the middle layer, the thermal stress caused by the difference in thermal expansion coefficient between the top plate and the core layer is significantly reduced or the thermal stress is effectively prevented from being transferred to the inside of the heat insulating structure, It is possible to effectively prevent breakage of the welded portion.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Will be clear to those who have knowledge of.

For example, the heat insulating structural material for a cryogenic tank of the present invention can be applied to a heat insulating structural material, a roof, a thermal insulation warehouse, and the like of a building in addition to a liquefied gas hold space insulation system. The roof structure is the area where about 40% of the standard building heat loss occurs, and insulation is very important. Due to the nature of the roof, waterproofing is also important, and it is built to withstand heavy loads such as snow, rain, and wind. In practice, this requires a variety of cumbersome coatings, insulation, waterproofing and construction work. However, when the heat insulating structural member of the present invention is applied, since the construction, insulation and waterproofing work can be completed by one construction, considerable material cost reduction and labor cost reduction effect can be expected.

The insulating material of the present invention can also be applied to a bunker tank of a ship. (HFO) which is used as a fuel for ship is very high viscosity at room temperature. Therefore, it is necessary to increase the temperature of medium fuel oil to improve the fluidity of the fuel oil tank. Do.

For this purpose, a variety of heating equipment is installed in the fuel oil tank, and as a result, the temperature inside the tank can be increased to about 100 ° C.

When the heat insulating structural material for a cryogenic tank of the present invention is applied, it is possible to complete the heat insulation and the construction work by one construction, thereby remarkably improving the economical efficiency.

Further, the heat insulating structural member of the present invention can be applied to a pipe requiring heat insulation.

Conventional pipes often require insulation for a variety of reasons. In this case, it is troublesome to install multiple layers of insulation on the metal pipe, and the insulation is exposed to the external environment, which is fundamentally weak in terms of maintenance. Vacuum insulation is currently being processed in the form of a pipe. Such a vacuum insulation material and an existing metal pipe can be easily fabricated as one body. In this case, since no separate insulation construction work is required, installation work is simplified, excellent insulation performance is ensured, and piping work is very easy to maintain.

In this embodiment, the thickness and shape of the lower plate and the upper plate, the vacuum insulation, the connector, and the like are merely shown arbitrarily for convenience of explanation, and thus can be variously changed according to design conditions.

For example, although a welding bead formed at a welding portion of a connection portion between the heat insulating structural members is partially formed only on the surface of the metal layer in the present embodiment, for the sake of convenience, And it is possible to control the welding depth and welding range by full penetration, half penetration method, etc. according to the classification rules. Furthermore, although not shown in the connecting portion between the intermetallic or non-metallic layers, the bonding strength and the like can be further increased by using a bonding or bonding method.

In addition, the connections are classified into ① block laminate structure ② filler laminate structure ③ block step structure ④ filling step structure ⑤ fill end structure ⑥ bolt fastening structure, but for convenience of explanation, , But is not limited thereto. In addition, although the connecting unit is configured to have three stages, the present invention is not limited thereto, and various configurations can be used.

The nonmetal layer (intermediate connection portion) may be made entirely of a non-foamable polymer material, but only a part may be made of a non-foamable polymer material. That is, the inside may be formed of a metal material and the surface may be formed of a non-foamable polymer material.

The lower block 31 and the upper block 32 may be made of a metal material in terms of strength but are not necessarily limited thereto and may be replaced with materials having a strength corresponding to a metal.

1: Substructure
10: Lower plate
20: Top plate
40: core layer
50: middle layer
51: Vacuum insulation
52: Vacuum insulation surface protection material
53: slip material
54: Reinforced insulation
70: Connector
80: Lightweight upper body
130:
131: Lower connection
132: upper connection
133: Nonmetal layer (intermediate connection part)
100: Adiabatic structural member to which a connecting portion of a block laminate structure is applied (First Embodiment)
200: Adiabatic structural member to which a connection part of a filler laminate structure is applied (second embodiment)
300: Insulating structural member applying connection part of block stepped structure (Third embodiment)
400: a heat insulating structural member to which a connection part of a filling stepped structure is applied (a fourth embodiment)
500: a heat insulating structural member to which a connection part of a filled finishing structure is applied (fifth embodiment)
600: Adiabatic structural member to which a bolt fastening type connection portion is applied (Sixth Embodiment)
700: Heat insulating structural member to which an overlay type connection part is applied (seventh embodiment)
800: Heat insulating structural member to which an overlay type connection part is applied (Eighth embodiment)
900: A heat insulating structural member according to a ninth embodiment of the present invention
S: Space
S1: Lower spacer
S2: Upper spacer

Claims (11)

delete Bottom plate;
An upper plate disposed above the lower plate at a predetermined distance from the lower plate;
A connection part which is provided at the end of the lower plate and the upper plate for preventing thermal bridging and for structural fastening and composed of a mixture of a metal layer and a nonmetal layer; And
A core layer filled with a non-expandable polymer which is injection-cured in a liquid phase in a space defined by the lower plate, the upper plate, and the connection portion; ≪ / RTI >
The connecting portion
A lower connection part of a metal material fixed to the lower plate, and an upper connection part of a metal material fixed to the upper plate, wherein the lower connection part and the upper connection part have a laminated structure in which a non- And a heat insulating material. Bottom plate;
An upper plate disposed above the lower plate at a predetermined distance from the lower plate;
A connection part which is provided at the end of the lower plate and the upper plate for preventing thermal bridging and for structural fastening and composed of a mixture of a metal layer and a nonmetal layer; And
A core layer filled with a non-expandable polymer which is injection-cured in a liquid phase in a space defined by the lower plate, the upper plate, and the connection portion; ≪ / RTI >
The connecting portion
A lower connection part of a metal material fixed to the lower plate and an upper connection part of a metal material which is fixed to the upper plate and is arranged to be partly overlapped with the lower connection part, And a step-like structure interposed between the first and second end faces. Bottom plate;
An upper plate disposed above the lower plate at a predetermined distance from the lower plate;
A connection part which is provided at the end of the lower plate and the upper plate for preventing thermal bridging and for structural fastening and composed of a mixture of a metal layer and a nonmetal layer; And
A core layer filled with a non-expandable polymer which is injection-cured in a liquid phase in a space defined by the lower plate, the upper plate, and the connection portion; ≪ / RTI >
The connecting portion
A lower connection part of a metal material fixed to the lower plate and an upper connection part of a metal which is fixed to the upper plate and is arranged to be in line with the lower connection part, Lt; / RTI >
Wherein the non-metallic layer is composed of a filling stepped structure which is integrally formed with the core layer in the process of forming the core layer after cutting off the gap between the lower connection part and the upper connection part using a temporary blocking member. Structural material. Bottom plate;
An upper plate disposed above the lower plate at a predetermined distance from the lower plate;
A connection part which is provided at the end of the lower plate and the upper plate for preventing thermal bridging and for structural fastening and composed of a mixture of a metal layer and a nonmetal layer; And
A core layer filled with a non-expandable polymer which is injection-cured in a liquid phase in a space defined by the lower plate, the upper plate, and the connection portion; ≪ / RTI >
The connecting portion
A lower connection part of a metal material fixed to the lower plate, and an upper connection part of a metal material fixed to the upper plate, wherein a nonmetal layer, which is an intermediate connection part, is interposed between the lower connection part and the upper connection part,
The upper connection part is detachably coupled to the upper plate, and a liquid non-foamable polymer is injected and cured in a space between the upper connection part and the lower connection part so as to be integrally formed with the core layer, And a filler-finished structure. Bottom plate;
An upper plate disposed above the lower plate at a predetermined distance from the lower plate;
A connection part which is provided at the end of the lower plate and the upper plate for preventing thermal bridging and for structural fastening and composed of a mixture of a metal layer and a nonmetal layer; And
A core layer filled with a non-expandable polymer which is injection-cured in a liquid phase in a space defined by the lower plate, the upper plate, and the connection portion; ≪ / RTI >
Wherein a plurality of fastening holes are formed in the rim of the lower plate and the upper plate so as to penetrate the lower plate and the upper plate vertically and the bolts are fastened to the fastening holes And the heat insulating material. The method according to any one of claims 2 to 6,
Characterized in that a lightweight shaped body is provided inside the core layer. Bottom plate;
An upper plate disposed above the lower plate at a predetermined distance from the lower plate;
A connection part which is provided at the end of the lower plate and the upper plate for preventing thermal bridging and for structural fastening and composed of a mixture of a metal layer and a nonmetal layer; And
A core layer filled with a non-expandable polymer which is injection-cured in a liquid phase in a space defined by the lower plate, the upper plate, and the connection portion; ≪ / RTI >
Wherein an inert gas circulation pipe is inserted into the non-metallic layer, a gas tube is connected to the inert gas circulation pipe, and the gas tube extends to a region where cracks can be generated. The method of claim 8,
Wherein an inert gas is circulated through the inert gas circulation pipe, and the concentration of the inert gas is checked in the gas recovery unit of the detection device to confirm whether gas leakage occurs. The method of claim 8,
Characterized in that a mesh or a filter is installed at the end of the gas tube to prevent the liquid non-foamable polymer from flowing into the gas tube during the formation of the core layer. delete

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