KR20100134878A - Membrane insulation box for lng ships - Google Patents

Membrane insulation box for lng ships Download PDF

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Publication number
KR20100134878A
KR20100134878A KR1020090053228A KR20090053228A KR20100134878A KR 20100134878 A KR20100134878 A KR 20100134878A KR 1020090053228 A KR1020090053228 A KR 1020090053228A KR 20090053228 A KR20090053228 A KR 20090053228A KR 20100134878 A KR20100134878 A KR 20100134878A
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South Korea
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insulation box
lng
membrane insulation
lng carrier
carrier membrane
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KR1020090053228A
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Korean (ko)
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백동민
백승철
박진석
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에스티엑스조선해양 주식회사
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Priority to KR1020090053228A priority Critical patent/KR20100134878A/en
Publication of KR20100134878A publication Critical patent/KR20100134878A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
    • B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/02—Wall construction
    • B65D90/06—Coverings, e.g. for insulating purposes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/001—Thermal insulation specially adapted for cryogenic vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0147—Shape complex
    • F17C2201/0161—Honeycomb
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0304—Thermal insulations by solid means
    • F17C2203/0329—Foam
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0304—Thermal insulations by solid means
    • F17C2203/0329—Foam
    • F17C2203/0333—Polyurethane
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0304—Thermal insulations by solid means
    • F17C2203/0354—Wood
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/22—Assembling processes
    • F17C2209/227—Assembling processes by adhesive means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

PURPOSE: A membrane insulation box for an LNG ship is provided to secure insulation performance due to the improved structural strength and prevent the concentration of stress. CONSTITUTION: A membrane insulation box for an LNG ship comprises an upper panel, a lower panel, a three-dimensional connection structure, and an adhesive. The upper panel, the lower panel, and the three-dimensional connection structure are made of plywood. The adhesive is applied on the upper and lower panels in order to fix the three-dimensional connection structure between the upper and lower panels. The three-dimensional connection structure has a hexagonal honeycomb structure in which the inner angle of a cell(410) is 60°.

Description

ＬＮＧ선 멤브레인 단열박스{MEMBRANE INSULATION BOX FOR LNG SHIPS}LMB wire membrane insulation box {MEMBRANE INSULATION BOX FOR LNG SHIPS}

본 발명은 LNG선 멤브레인 단열박스에 관한 것으로, 보다 상세하게는 기존과 동등 이상의 열전달율을 가지면서 허니컴 샌드위치 패널 구조를 통해 보다 더 향상된 강도를 갖도록 구조적 설계가 가능한 LNG선 멤브레인 단열박스에 관한 것이다.The present invention relates to an LNG carrier membrane insulation box, and more particularly, to an LNG carrier membrane insulation box that can be structurally designed to have more improved strength through a honeycomb sandwich panel structure while having a heat transfer rate equal to or higher than that of the conventional.

일반적으로, 천연가스(Natural Gas)는 생산지에서 극저온으로 액화된 액화천연가스(LNG:Liquefied Natural Gas)의 상태로 만들어진 후 LNG 운반선에 의해 목적지까지 원거리에 걸쳐 수송된 후, LNG 부유식 저장 및 재기화 장치(FSRU, Floating Storage and Regasification Unit) 또는 육상의 하역 터미널을 거치면서 재기화되어 소비처로 공급된다.Generally, natural gas is produced in the form of cryogenic liquefied natural gas (LNG) at the place of production, and then transported over long distances to destinations by LNG carriers, followed by storage and recovery of floating LNG. It is regasified and supplied to the consumer via a FSRU (Floating Storage and Regasification Unit) or a land loading terminal.

이러한 천연가스의 액화온도는 상압에서 약 -163℃의 극저온이므로, LNG는 그 온도가 상압에서 -163℃ 보다 약간만 높아도 증발된다.Since the liquefaction temperature of the natural gas is a cryogenic temperature of about -163 ℃ at normal pressure, LNG is evaporated even if the temperature is slightly higher than -163 ℃ at normal pressure.

종래 LNG 운반선의 경우, LNG 운반선의 LNG 저장탱크는 단열처리가 되어 있기는 하지만, 외부의 열이 LNG에 지속적으로 전달되므로, LNG 운반선에 의해 LNG를 수송하는 도중에 LNG가 LNG 저장탱크 내에서 지속적으로 기화되어 LNG 저장 탱크 내에 증발가스(Boil-Off Gas)가 발생한다.In the case of conventional LNG carriers, although LNG storage tanks of LNG carriers are insulated, external heat is continuously transferred to LNG, so LNG is continuously in LNG storage tanks while LNG is being transported by LNG carriers. The vaporization generates boil-off gas in the LNG storage tank.

이렇게 LNG 저장 탱크 내에 증발가스가 발생하면, LNG 저장탱크의 압력이 상승하여 위험하게 된다.When the boil-off gas is generated in the LNG storage tank in this way, the pressure of the LNG storage tank rises and becomes dangerous.

따라서, LNG선의 경우 이를 방지하기 위한 보냉, 즉 방열수단이 요구되는데, 그 예로 멤브페인(Membrane)형과, 구형(Spherical)형을 들 수 있다.Accordingly, in the case of LNG carriers, cold insulation, that is, heat dissipation means is required to prevent this, and examples thereof include a membrane type and a spherical type.

그런데, 멤브레인형이 구형 탱크에 비하여 적재용량이 크고 제작이 용이하기 때문에 현재 가장 널리 사용되고 있으며, 이러한 멤브레인형 LNG 보냉수단은 프랑스 GTT(Gaz Transport and Technigaz)사에 의해 가즈 트랜스포트(Gaz Transport) 시스템과 테크니가즈(Technigaz) 시스템이 개발된 바 있다.However, the membrane type is the most widely used because of the larger loading capacity and easier manufacturing than the old tank, and the membrane type LNG cooling means is used by the Gaz Transport and Technigaz (GTT) system in France. And Technigaz systems have been developed.

예컨대, 가즈 트랜스포트 시스템은 열팽창이 매우 낮은 인바강 (Invar, 36% 니켈강)을 1차 및 2차 방벽으로 사용하고 있으며, 방벽 사이에 펄라이트(Pearlite)를 채워 단열박스로 사용한다.For example, the Gaz Transport system uses Invar steel (36% nickel steel) with very low thermal expansion as primary and secondary barriers, and is used as a thermal insulation box by filling pearlite between the barriers.

이와 달리, 테크니가즈 시스템(Mark-III시스템, GTT)은 열변형으로 인한 팽창 및 수축을 흡수하기 위하여 격자모양의 주름이 성형된 스테인리스 강판을 1차 방벽으로 사용한다. 그리고 알루미늄 포일의 양면에 유리섬유 복합재료가 접합된 형태의 트리플랙스(Triplex)를 2차 방벽으로 사용하고 있으며, 방벽 사이에 폴리우레탄 (Poly urethane)폼을 채워서 단열재로 사용한다.In contrast, the Technics system (Mark-III system, GTT) uses a grid of corrugated stainless steel sheet as a primary barrier to absorb expansion and contraction due to thermal deformation. And triplex (Triplex) in the form of the glass fiber composite material bonded to both sides of the aluminum foil is used as the secondary barrier, and the polyurethane foam (Poly urethane) between the barrier is used as the insulation.

두 시스템의 가스 기화율(BOR, boil-off rate)은 비슷한 것으로 알려져 있으나, 스테인리스 및 트리플렉스이 인바 멤브레인에 비하여 가격이 싸고 시공이 편하며 폴리우레탄 폼의 단열효과가 뛰어나기 때문에, 테크니가즈 시스템이 선호되고 있는 추세이다.The boil-off rates (BOR) of the two systems are known to be similar, but because of the low cost, ease of construction, and superior thermal insulation of polyurethane foams compared to Invar membranes, the technology system The trend is favored.

이와 같은 방열수단인 단열박스는 현재 7개의 파티션으로 나뉘어진 프라이머리 박스(Primary Box)와 6개의 파티션으로 나뉘어진 세컨더리 박스(Secondary Box)로 구성되어 있다.The heat dissipation box, which is such a heat dissipation means, is currently composed of a primary box divided into seven partitions and a secondary box divided into six partitions.

그런데, 이러한 방열성 이외에도 LNG선의 경우 LNG의 슬로싱(Sloshing) 현상에 의해 방열수단에 작용하는 하중, 즉 유체의 동하중 구조물의 안전성 및 내구성 평가에 있어 반드시 고려되어야 할 매우 중요한 설계인자로 작용한다.However, in addition to such heat dissipation, the LNG carrier serves as a very important design factor that must be considered in evaluating the safety and durability of the load acting on the heat dissipation means by the sloshing phenomenon of LNG, that is, the dynamic load structure of the fluid.

즉, 슬로싱 하중은 선박의 운항 중 반복적으로 작용하여 수축/팽창 열적하중 및 선체 굽힘 변형하중과 함께 멤브레인을 포함한 방열수단 자체 및 연결부를 손상시키는 요인이 되므로 이를 경감하기 위해 탱크의 완충특성을 구비한 내벽 구조 형상설계, 화물 적재량의 제한 또는 슬로싱 원인인 선체 동요를 판단하여 경보를 발하는 시스템 등의 개발이 요구된다.In other words, the sloshing load acts repeatedly during the operation of the ship, and thus the shrinkage / expansion thermal load and the hull bending deformation load, which are factors that damage the heat dissipation means itself and the connection part including the membrane. It is necessary to develop an internal wall structure shape design, a limit on cargo load, or a system for alerting the hull fluctuation that is the cause of sloshing.

하지만, 종래에는 이러한 인자에 대한 고려가 미약하여 단지 방열수단에 단지 강도가 높은 단열재를 적용하였기 때문에 그로 인해 단열층의 두께가 증가되어야 하므로 수송 용적률이 저하되는 단점이 있었다.However, in the related art, since the consideration of such a factor is weak, only a high-strength heat insulating material was applied to the heat dissipation means, so that the thickness of the heat insulating layer had to be increased, thereby lowering the transport volume ratio.

뿐만 아니라, 최근 LNG선의 대형화와 북극과 같은 극지대에서의 운반능력이 매우 중요한 요소로 평가됨으로 인해 이에 대한 방안으로 새로운 멤브레인형 단열박스의 개발이 시급히 요청되고 있다.In addition, as the size of LNG carriers and transport capacity in the polar regions such as the North Pole have been evaluated as a very important factor, the development of a new membrane type insulation box is urgently required as a solution.

본 발명은 상술한 바와 같은 종래 기술상의 제반 문제점들을 감안하여 이를 해결하고자 창출된 것으로, LNG 운반선에서 LNG용 단열박스의 구조를 허니컴형 샌드위치 패널로 개량하여 단열층의 두께를 증가시키지 않으면서도 기존과 동등이상의 단열성능을 가지면서 LNG의 슬로싱에 의한 영향을 최소화시켜 수송 용적률을 높이고, 극한 환경속에서도 우수한 수송력을 제공할 수 있도록 한 LNG선 멤브레인 단열박스를 제공함에 그 주된 해결 과제가 있다.The present invention has been created in view of the above-mentioned problems in the prior art, and improved the structure of the insulation box for LNG to a honeycomb sandwich panel in an LNG carrier without increasing the thickness of the insulation layer. The main problem is to provide a LNG carrier membrane insulation box that has the above insulation performance to minimize the impact of the sloshing of LNG to increase the transport volume ratio, and provide excellent transport capacity even in extreme environments.

본 발명은 상기한 해결 과제를 달성하기 위한 수단으로, LNG선 멤브레인 단열박스에 있어서; 상기 단열박스는 플라이우드로 이루어진 상부패널과; 상기 상부패널과 동일재질로 이루어진 하부패널과; 상기 상,하부패널과 동일재질로 이루어진 3차원 연결구조체와; 상기 상,하부패널에 도포되고, 상기 3차원연결구조체를 상기 상,하부패널 사이에 연결고정하는 접착제를 포함하여 구성되는 것을 특징으로 하는 LNG선 멤브레인 단열박스를 제공한다.The present invention as a means for achieving the above object, in the LNG carrier membrane insulation box; The heat insulation box comprises an upper panel made of plywood; A lower panel made of the same material as the upper panel; A three-dimensional connection structure made of the same material as the upper and lower panels; The LNG carrier membrane insulation box is applied to the upper and lower panels, and comprises an adhesive for connecting and fixing the three-dimensional connection structure between the upper and lower panels.

이때, 상기 3차원 연결구조체는 셀의 내부각이 60°를 이루는 정육각형의 허니컴 구조체인 것에도 그 특징이 있다.In this case, the three-dimensional connection structure is also characterized in that the honeycomb structure of the regular hexagon that the internal angle of the cell makes a 60 °.

또한, 상기 3차원 연결구조체는 셀의 내부각이 60°와 150°를 포함하는 육각형의 허니컴 구조체인 것에도 그 특징이 있다.In addition, the three-dimensional connection structure is also characterized in that the honeycomb structure of the hexagon including the internal angle of the cell 60 ° and 150 °.

뿐만 아니라, 상기 허니컴 구조체의 셀에는 발포성 충진재가 채워진 것에도 그 특징이 있다.In addition, the cell of the honeycomb structure is characterized in that the foam filler is filled.

아울러, 상기 발포성 충진재는 폴리우레탄, 펄라이트 중 어느 하나인 것에도 그 특징이 있다.In addition, the foamable filler is characterized in that any one of polyurethane, pearlite.

그리고, 상기 3차원 연결구조체는 접착제가 열융착되는 방식으로 상기 상부패널 및 하부패널에 접합고정되는 것에도 그 특징이 있다.In addition, the three-dimensional connection structure is characterized in that the adhesive is fixed to the upper panel and the lower panel in a manner that the adhesive is heat-sealed.

나아가, 상기 3차원 연결구조체는 피라미드 트러스, 옥테트 트러스, 카고메 트러스 중 어느 하나로 변형된 것에도 그 특징이 있다.In addition, the three-dimensional connecting structure is characterized in that the deformation of any one of the pyramid truss, octet truss, Kagome truss.

본 발명에 따르면, 구조적 강도 증가에 의해 단열층의 두께를 크게 하지 않으면서도 기존과 동등 이상의 단열성능을 확보할 수 있고, 다수의 셀에 의한 응력분산을 통해 스트레스 집중현상이 해소되어 내피로성이 증진되며 내구성이 향상되고, 부가적으로 흡음성 및 방진성도 향상되는 효과를 얻을 수 있다.According to the present invention, by increasing the structural strength it is possible to secure a thermal insulation performance equal to or higher than the existing without increasing the thickness of the thermal insulation layer, and the stress concentration phenomenon is solved by stress dispersion by a plurality of cells to improve fatigue resistance Durability can be improved, and additionally, sound absorption and dustproofness can also be improved.

이하에서는, 첨부도면을 참고하여 본 발명에 따른 바람직한 실시예를 보다 상세하게 설명하기로 한다.Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment according to the present invention.

도 1 내지 도 4는 본 발명에 따른 LNG선 멤브레인 단열박스를 구성하는 샌드위치패널의 예시도이고, 도 5 및 도 6은 본 발명에 따른 LNG선 멤브레인 단열박스를 구성하는 샌드위치패널의 모식도이며, 도 7은 본 발명에 따른 LNG선 멤브레인 단열박스를 구성하는 샌드위치패널의 변형예를 보인 예시도이다.1 to 4 is an exemplary view of a sandwich panel constituting the LNG carrier membrane insulation box according to the present invention, Figures 5 and 6 are schematic views of the sandwich panel constituting the LNG carrier membrane insulation box according to the present invention, Figure 7 is an exemplary view showing a modification of the sandwich panel constituting the LNG carrier membrane insulation box according to the present invention.

도 1 내지 도 4에 도시된 바와 같이, 본 발명에 따른 LNG선 멤브레인 단열박 스는 허니컴 구조의 샌드위치패널(S)로 이루어진다.1 to 4, the LNG carrier membrane insulation box according to the present invention is composed of a sandwich panel (S) of the honeycomb structure.

이때, 상기 샌드위치패널(S)은 플라이우드(Plywood)로 이루어짐이 바람직하다.At this time, the sandwich panel (S) is preferably made of plywood (Plywood).

그리고, 상기 샌드위치패널(S)은 내부에 충진재(미도시)가 충진될 수 있는데 이는 방열성능은 물론 방음, 진동 감쇄에 더욱 효과적이다.The sandwich panel S may be filled with a filler (not shown), which is more effective in heat dissipation performance as well as soundproofing and vibration attenuation.

이러한 충진재로는 페놀, 우레탄, 스티렌 등의 합성수지의 경질발포체로 이루어진 폼재를 이용할 수 있으며, 특히 연통기포구조를 가진 페놀 폼재는 뛰어난 흡음 능력과 함께 방진성능을 나타내므로 바람직하다.As the filler, a foam material made of a hard foam of synthetic resin such as phenol, urethane, styrene, etc. may be used. Particularly, a phenol foam material having a communication bubble structure is preferable because it exhibits excellent sound absorption performance and dustproof performance.

뿐만 아니라, 상기 충진재로는 경량이면서 강도 유지에 적합하고 비용이 저렴한 펄라이트, 폴리우레탄 등이 될 수도 있다.In addition, the filler may be made of pearlite, polyurethane, etc., which are lightweight, suitable for maintaining strength, and are inexpensive.

아울러, 구조적으로 볼 때 상기 샌드위치패널(S)은 상부패널(100)과 하부패널(200) 및 이들 사이에 개재되는 연결구조체(400)로 이루어진다.In addition, in terms of structure, the sandwich panel S includes an upper panel 100 and a lower panel 200 and a connection structure 400 interposed therebetween.

이 경우, 상기 상부패널(100), 하부패널(200) 및 연결구조체(400)는 모두 동일 재질, 바람직하기로는 단열성능이 우수한 플라이우드로 형성될 수 있다.In this case, the upper panel 100, the lower panel 200 and the connecting structure 400 may all be formed of the same material, preferably plywood having excellent heat insulating performance.

그리고, 상기 상부패널(100)과 하부패널(200)에는 접착제(300)가 도포되어 상기 연결구조체(400)를 보다 용이하게 부착시킬 수 있도록 구성됨이 더욱 바람직하다.In addition, the upper panel 100 and the lower panel 200 is more preferably configured to be attached to the adhesive 300 is more easily attached to the connecting structure 400.

이때, 상기 접착제(300)는 상기 연결구조체(400)를 충분히 접착시킬 수 있도록 우드접착제를 사용함이 바람직하며, 필요한 경우 수지접합 등 다양한 방식으로 상호 고정할 수 있다.At this time, the adhesive 300 is preferably using a wood adhesive so as to sufficiently adhere the connection structure 400, can be fixed to each other in various ways, such as resin bonding if necessary.

여기에서, 수지접합시 후술하는 바와 같이, 열프레스를 이용한 열융착 방식을 통해 수지접착제로 연결구조체(400)를 상기 상부패널(100)과 하부패널(200) 사이에 견고히 접합시킬 수 있다.Here, the resin structure can be firmly bonded between the upper panel 100 and the lower panel 200 using a resin adhesive, as described below, through a thermal fusion method using a heat press.

한편, 상기 연결구조체(400)는 도 2 내지 도 6에 도시된 예시와 같은 3차원 허니컴 구조체일 수 있다.On the other hand, the connection structure 400 may be a three-dimensional honeycomb structure such as the example shown in Figures 2 to 6.

보통, 허니컴 구조체는 안정적인 구조체로서 다수의 셀(410)에 의해 응력이 동일하게 분산되기 때문에 스트레스(Stress)의 집중현상이 없어지고, 내피로성이 향상되는 장점을 가진 것으로 알려져 있다.In general, the honeycomb structure is known as a stable structure, because stress is uniformly distributed by the plurality of cells 410, thereby eliminating concentration of stress and improving fatigue resistance.

따라서, 이 셀(410)을 비워둔 형태로 사용함으로써 경량화시킬 수 있고, 방진, 흡음, 단열성을 더욱 높이기 위해 앞서 설명한 경량의 충진재를 채워 넣음으로써 사용처의 특성에 맞게 샌드위치패널(S)을 구현할 수 있다.Therefore, by using the cell 410 in an empty form, the weight can be reduced, and the sandwich panel S can be implemented according to the characteristics of the application by filling the above-mentioned lightweight filler to further increase dust, sound absorption, and heat insulation. have.

이를 위해, 도 4에 도시된 바와 같이, 상기 연결구조체(400)를 사이에 두고 상부패널(100)과 하부패널(200)을 배치한 다음 열프레스(500)를 사용하여 접착제(300)가 열융착되는 형태로 접착되도록 함으로써 보다 견고하고 강도가 높으면서 경량인 LNG선 단열박스용 샌드위치패널(S)을 구성할 수 있다.To this end, as shown in FIG. 4, the upper panel 100 and the lower panel 200 are disposed with the connection structure 400 interposed therebetween, and then the adhesive 300 is heated using the heat press 500. By gluing in a fused form, it is possible to construct a sandwich panel (S) for LNG ship insulation box that is more robust and high in strength.

한편, 상기 연결구조체(400)는 상술한 허니컴 구조체에 국한되지 않고, 4개의 정삼각형 격자가 경사면을 이루고, 정사각형 격자는 아랫(또는 윗)면은 이루고 있어 사각형 형태의 판구조물을 만들기 유리하며, 가장 일반적인 트러스 형태인 피라미드(Pyramid) 트러스 형태가 될 수도 있고, 다른 트러스 구조로서 정사면체와 정팔면체가 조합된 형태의 옥테트(Octet) 트러스(R. Buckminster Fuller,1961, US Patent 2,986,241)를 들 수 있으며, 옥테트 트러스를 변형한 카고메(Kagome) 트러스(5S Hyun, A.M. Karlsson, S. Torquato, A.S. Evans, 2003, Int. J. of Solids and Structures, Vol.40, pp.6989-6998)가 사용될 수도 있다.On the other hand, the connecting structure 400 is not limited to the honeycomb structure described above, four regular triangular lattice forms an inclined plane, the square lattice forms a lower (or upper) surface is advantageous to make a rectangular plate structure, most It may be in the form of a general truss pyramid (Pyramid) truss, as another truss structure octet (Octet) truss (R. Buckminster Fuller, 1961, US Patent 2,986, 241) is a combination of tetrahedron and octahedron, A Kagome truss (5S Hyun, AM Karlsson, S. Torquato, AS Evans, 2003, Int. J. of Solids and Structures, Vol. 40, pp. 6989-6998) that modified the octet truss may be used. .

또다른 예로, 도 7에 예시한 바와 같이, 3차원 허니컴 구조체의 경우라도 힘을 받는 방향으로 강도보강을 위해 내부각을 다르게 변형(60°,150°)시켜 작은 각 방향으로 배열된 부분의 강도가 더 크게 되도록 변형할 수도 있을 것이며, 그 반대도 가능하고, 내부각을 다른 각도로 변경할 수도 있을 것인 바, 이는 사용처에 따라 달라질 수 있는데, 본 발명과 관련된 LNG선용 단열박스의 경우 60°와 150°로 변형되는 것이 바람직하다.As another example, as illustrated in FIG. 7, even in the case of a three-dimensional honeycomb structure, the strength of a portion arranged in small angular directions by differently deforming (60 °, 150 °) an internal angle for strength reinforcement in a direction of receiving force. It may be modified to be larger, and vice versa, and the internal angle may be changed to another angle, which may vary depending on the use, in the case of the insulation box for LNG carriers according to the present invention 60 ° and It is preferred to deform to 150 °.

이러한 구성으로 이루어진 본 발명에 따른 단열박스는 기존과 동일한 재질로 이루어진 3차원 허니컴 구조를 갖는 샌드위치패널(S)을 통해 구조적 힘을 증가시키게 된다.Insulating box according to the present invention made of such a configuration is to increase the structural force through the sandwich panel (S) having a three-dimensional honeycomb structure made of the same material as the conventional.

즉, 상기 3차원 허니컴 구조를 갖는 연결구조체(400)는 상부패널(100)과 하부패널(200)에 수직한 방향으로의 변형에 대한 저항성을 증가시키게 되고, 또한 전단강성도 증가시키게 되므로 결국 구조적 힘(Structural Strength)를 증가키시게 된다.That is, the connection structure 400 having the three-dimensional honeycomb structure increases the resistance to deformation in the direction perpendicular to the upper panel 100 and the lower panel 200, and also increases the shear stiffness, which in turn results in structural strength. You will increase your Structural Strength.

뿐만 아니라, 슬로싱(Sloshing)과 같은 현상에 의해 충돌압(Impact Pressure)이 발생되더라도 다수의 셀(410)을 통한 응력 분산시 순식간에 이루어지게 되어 스트레스의 집중을 피하게 되어 국부적인 변형이나 파손을 막게 되며, 내피로성이 향상되게 되고, 그에 따라 내구성이 높아지게 된다.In addition, even when an impact pressure is generated by a phenomenon such as sloshing, the stress is distributed through a plurality of cells 410 at a time to prevent stress concentration, so that local deformation or breakage is avoided. It will prevent the, fatigue resistance is improved, thereby increasing the durability.

따라서, 단열성능은 기존과 동일 소재를 사용하기 때문에 동등 이상을 유지할 수 있게 되고, 내구성이나 경량성, 내피로성에 있어 기존에 비해 현저히 증가되어 특히 슬로싱에 대한 저항력이 높아 극한환경에서 적응력이 높고, 효율적인 방열수단으로 활용될 수 있다.Therefore, the insulation performance can be maintained more than the same because it uses the same material as before, and significantly increased compared to the existing in durability, light weight, and fatigue resistance, especially high resistance to sloshing, high adaptability in extreme environments It can be utilized as an efficient heat dissipation means.

도 1 내지 도 4는 본 발명에 따른 LNG선 멤브레인 단열박스를 구성하는 샌드위치패널의 예시도,1 to 4 is an exemplary view of a sandwich panel constituting the LNG carrier membrane insulation box according to the present invention,

도 5 및 도 6은 본 발명에 따른 LNG선 멤브레인 단열박스를 구성하는 샌드위치패널의 모식도,5 and 6 is a schematic view of the sandwich panel constituting the LNG carrier membrane insulation box according to the present invention,

도 7은 본 발명에 따른 LNG선 멤브레인 단열박스를 구성하는 샌드위치패널의 변형예를 보인 예시도.Figure 7 is an exemplary view showing a modification of the sandwich panel constituting the LNG carrier membrane insulation box according to the present invention.

♧ 도면의 주요 부분에 대한 부호의 설명 ♧♧ description of the symbols for the main parts of the drawing ♧

100....상부패널 200....하부패널100 ... top panel 200 ... bottom panel

300....접착제 400....연결구조체300 ... Adhesive 400 .... Connecting structure

500....열프레스500 .... Heat Press

Claims (7)

LNG선 멤브레인 단열박스에 있어서;In the LNG carrier membrane insulation box; 상기 단열박스는 플라이우드로 이루어진 상부패널과;The heat insulation box comprises an upper panel made of plywood; 상기 상부패널과 동일재질로 이루어진 하부패널과;A lower panel made of the same material as the upper panel; 상기 상,하부패널과 동일재질로 이루어진 3차원 연결구조체와;A three-dimensional connection structure made of the same material as the upper and lower panels; 상기 상,하부패널에 도포되고, 상기 3차원연결구조체를 상기 상,하부패널 사이에 연결고정하는 접착제를 포함하여 구성되는 것을 특징으로 하는 LNG선 멤브레인 단열박스.The LNG carrier membrane insulation box is applied to the upper and lower panels, comprising an adhesive for connecting and fixing the three-dimensional connection structure between the upper and lower panels. 제1항에 있어서;The method of claim 1, further comprising: 상기 3차원 연결구조체는 셀의 내부각이 60°를 이루는 정육각형의 허니컴 구조체인 것을 특징으로 하는 LNG선 멤브레인 단열박스.The three-dimensional connecting structure is a LNG carrier membrane insulation box, characterized in that the honeycomb structure of the regular hexagon that makes the inner angle of the cell 60 °. 제1항에 있어서;The method of claim 1, further comprising: 상기 3차원 연결구조체는 셀의 내부각이 60°와 150°를 포함하는 육각형의 허니컴 구조체인 것을 특징으로 하는 LNG선 멤브레인 단열박스.The three-dimensional connection structure is an LNG carrier membrane insulation box, characterized in that the honeycomb structure of the hexagon including the internal angle of the cell 60 ° and 150 °. 제2항 또는 제3항에 있어서;The method of claim 2 or 3; 상기 허니컴 구조체의 셀에는 발포성 충진재가 채워진 것을 특징으로 하는 LNG선 멤브레인 단열박스. LNG cell membrane insulation box, characterized in that the cell of the honeycomb structure is filled with a foaming filler. 제4항에 있어서;The method of claim 4; 상기 발포성 충진재는 폴리우레탄, 펄라이트 중 하나인 것을 특징으로 하는 LNG선 멤브레인 단열박스.The expandable filler is a LNG carrier membrane insulation box, characterized in that one of polyurethane, pearlite. 제1항에 있어서;The method of claim 1, further comprising: 상기 3차원 연결구조체는 수지접착제가 열프레스에 의해 상기 상부패널 및 하부패널에 열융착되는 방식으로 접합되는 것을 특징으로 하는 LNG선 멤브레인 단열박스.The three-dimensional connecting structure is a LNG carrier membrane insulation box, characterized in that the resin adhesive is bonded in a manner that is thermally fused to the upper panel and the lower panel by a heat press. 제1항에 있어서;The method of claim 1, further comprising: 상기 3차원 연결구조체는 피라미드 트러스, 옥테트 트러스, 카고메 트러스 중 어느 하나로 변형된 것을 특징으로 하는 LNG선 멤브레인 단열박스.The three-dimensional connecting structure is a LNG carrier membrane insulation box, characterized in that transformed into any one of the pyramid truss, octet truss, kagome truss.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101393329B1 (en) * 2012-04-10 2014-05-27 대우조선해양 주식회사 Method for installing insulation on insulation box of a lng storage tank
KR101419824B1 (en) * 2012-12-31 2014-07-15 대우조선해양 주식회사 Container for storing liquefied natural gas
WO2022057900A1 (en) * 2020-09-18 2022-03-24 Shanghai Bluesoul Environmental Technology Co., Ltd. Arrangment for containing liquid gas in a hull compartement of a marine construction

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101393329B1 (en) * 2012-04-10 2014-05-27 대우조선해양 주식회사 Method for installing insulation on insulation box of a lng storage tank
KR101419824B1 (en) * 2012-12-31 2014-07-15 대우조선해양 주식회사 Container for storing liquefied natural gas
WO2022057900A1 (en) * 2020-09-18 2022-03-24 Shanghai Bluesoul Environmental Technology Co., Ltd. Arrangment for containing liquid gas in a hull compartement of a marine construction

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