KR20100037181A - Insulation box for a lng storage tank - Google Patents

Insulation box for a lng storage tank Download PDF

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KR20100037181A
KR20100037181A KR1020080096357A KR20080096357A KR20100037181A KR 20100037181 A KR20100037181 A KR 20100037181A KR 1020080096357 A KR1020080096357 A KR 1020080096357A KR 20080096357 A KR20080096357 A KR 20080096357A KR 20100037181 A KR20100037181 A KR 20100037181A
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storage tank
insulation box
box
lng
lng storage
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KR1020080096357A
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Korean (ko)
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KR101012644B1 (en
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박철웅
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대우조선해양 주식회사
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    • 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
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/12—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge with provision for thermal insulation
    • 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
    • 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
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/02—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge involving reinforcing arrangements
    • F17C1/08—Integral reinforcements, e.g. ribs
    • 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
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • 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

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

Abstract

PURPOSE: An insulation box for an LNG storage tank is provided to reduce the use of insulating material and simplify the insulation by cutting out the corners in the oblique direction and attaching insulation box fixtures to the cut out parts. CONSTITUTION: An insulation box(30) for an LNG storage tank forms insulation walls of the LNG storage tank. The corners of the insulation box are cut out in the oblique direction, and fixtures for mount on a ship are formed on the cut out parts so that the insulation box is arranged close to adjacent insulation boxes. A reinforcing member comprising longitudinal and horizontal members is installed in a grid form inside the insulation box.

Description

ＬＮＧ 저장탱크용 단열박스{INSULATION BOX FOR A LNG STORAGE TANK}INSULATION BOX FOR A LNG STORAGE TANK

본 발명은 LNG를 운반하는 LNG 운반선 내에 설치되는 GT NO 96형 저장탱크용 단열박스에 관한 것으로서, 더욱 상세하게는 모서리 부분을 사선방향으로 절단한 후 이 절단부위에 단열박스 고정용 부재를 마련함으로써 LNG 저장탱크 제조시 단열박스와 단열박스 사이의 공간을 배제할 수 있어 단열재를 절감하고 작업을 단순화한 LNG 저장탱크용 단열박스에 관한 것이다.The present invention relates to a heat insulation box for GT NO 96 type storage tank installed in an LNG carrier carrying LNG, and more particularly, by cutting the corner portion in an oblique direction and providing a member for fixing the heat insulation box at the cut portion. The present invention relates to an insulation box for an LNG storage tank, which can reduce the insulation and simplify the work by eliminating the space between the insulation box and the insulation box when manufacturing an LNG storage tank.

천연가스는, 육상 또는 해상의 가스배관을 통해 가스 상태로 운반되거나, 또는 액화된 액화천연가스(LNG)의 상태로 LNG 수송선에 저장된 채 원거리의 소비처로 운반된다. 액화천연가스는 천연가스를 극저온(대략 -163℃)으로 냉각하여 얻어지는 것으로 가스 상태의 천연가스일 때보다 그 부피가 대략 1/600로 줄어들므로 해상을 통한 원거리 운반에 매우 적합하다.Natural gas is transported in a gaseous state through onshore or offshore gas piping, or to a distant consumer while stored in an LNG carrier in the form of liquefied liquefied natural gas (LNG). Liquefied natural gas is obtained by cooling natural gas to cryogenic temperature (approximately -163 ℃), and its volume is reduced to about 1/600 than natural gas in gas state, so it is very suitable for long distance transportation through sea.

LNG를 싣고 바다를 운항하여 육상 소요처에 LNG를 하역하기 위한 LNG 수송선이나, 마찬가지로 LNG를 싣고 바다를 운항하여 육상 소요처에 도착한 후 저장된 LNG를 재기화하여 천연가스 상태로 하역하는 LNG RV(Regasification Vessel)는, 액화천연가스의 극저온에 견딜 수 있는 저장탱크(흔히, '화물창'이라고 함)를 포함한 다.LNG transporter for loading and unloading LNG to land requirements by operating the sea with LNG, or LNG RV (Regasification) that reloads LNG after unloading the sea with LNG for recharging the stored LNG Vessels include storage tanks (commonly referred to as cargo holds) that can withstand the cryogenic temperatures of liquefied natural gas.

최근에는 LNG FPSO(Floating, Production, Storage and Offloading)나 LNG FSRU(Floating Storage and Regasification Unit)와 같은 부유식 해상 구조물에 대한 수요가 점차 증가하고 있으며, 이러한 부유식 해상 구조물에도 LNG 수송선이나 LNG RV에 설치되는 저장탱크가 포함된다.Recently, there is a growing demand for floating offshore structures such as LNG Floating, Production, Storage and Offloading (FPSO) or LNG Floating Storage and Regasification Units (FSRUs). Includes a storage tank installed.

LNG FPSO는, 생산된 천연가스를 해상에서 직접 액화시켜 저장탱크 내에 저장하고, 필요시 이 저장탱크 내에 저장된 LNG를 LNG 수송선으로 옮겨싣기 위해 사용되는 부유식 해상 구조물이다. 또 LNG FSRU는 육상으로부터 멀리 떨어진 해상에서 LNG 수송선으로부터 하역되는 LNG를 저장탱크에 저장한 후 필요에 따라 LNG를 기화시켜 육상 수요처에 공급하는 부유식 해상 구조물이다.LNG FPSOs are floating offshore structures that are used to liquefy the produced natural gas directly from the sea and store it in storage tanks and, if necessary, to transport LNG stored in the storage tanks to LNG carriers. In addition, LNG FSRU is a floating offshore structure that stores LNG unloaded from LNG carriers in a storage tank at sea far from the land, and then vaporizes LNG as needed to supply land demand.

이와 같이 LNG와 같은 액체화물을 해상에서 수송하거나 보관하는 LNG 수송선, LNG RV, LNG FPSO, LNG FSRU 등의 해상 구조물 내에는 LNG를 극저온 상태로 저장하기 위한 저장탱크가 설치되어 있다.As described above, a storage tank for storing LNG in a cryogenic state is installed in an offshore structure such as an LNG carrier, an LNG RV, an LNG FPSO, or an LNG FSRU that transports or stores a liquid cargo such as LNG.

이 저장탱크는 단열재에 화물의 하중이 직접적으로 작용하는지 여부에 따라 독립탱크형(Independent Tank)과 멤브레인형(Membrane Type)으로 분류할 수 있다. 하기 표 1에서 나타난 바와 같이, 통상 멤브레인형 저장탱크는 GT NO 96형과 TGZ Mark Ⅲ형으로 나눠지며, 독립탱크형 저장탱크는 MOSS형과 IHI-SPB형으로 나눠진다.These storage tanks can be classified into independent tank type and membrane type depending on whether the load of cargo is directly applied to the insulation. As shown in Table 1 below, membrane type storage tanks are generally divided into GT NO 96 type and TGZ Mark III type, and independent tank type storage tanks are divided into MOSS type and IHI-SPB type.

전술된 GT형 및 TGZ형 탱크구조는 미국 특허 제 6,035,795 호, 제 6,378,722 호, 제 5,586,513 호 및 미국 특허공개 제 2003-0000949 호 등과, 대한민국 특허공 개 제 10-2000-0011347 호 및 제 10-2000-0011346 호 등에 기재되어 있다. 또한, 독립탱크형 저장탱크의 구조는 대한민국 특허 제 10-15063 호 및 제 10-305513 호 등에 기재되어 있다.The GT and TGZ tank structures described above are described in U.S. Patent Nos. 6,035,795, 6,378,722, 5,586,513 and U.S. Patent Publication Nos. 2003-0000949 and the like, and Korean Patent Publication Nos. 10-2000-0011347 and 10-2000. -0011346 and the like. In addition, the structure of the independent tank type storage tank is described in Korean Patent Nos. 10-15063 and 10-305513.

Figure 112008068933247-PAT00001
Figure 112008068933247-PAT00001

도 1 및 도 2에 도시된 바와 같이, 상기 GT NO 96형의 저장탱크는, 0.5 ~ 0.7㎜ 두께의 인바(Invar) 강(36% Ni)으로 이루어지는 1차 밀봉벽(10) 및 2차 밀봉벽(15)과, 플라이우드 박스(plywood box) 및 펄라이트(perlite) 등으로 이루어지는 1차 단열벽(11) 및 2차 단열벽(16)이, 선체의 내부표면(1, 2) 상에 번갈아 적층 설치되어 이루어진다.As shown in Figures 1 and 2, the GT NO 96 type storage tank, the primary sealing wall 10 and the secondary sealing made of Invar steel (36% Ni) of 0.5 ~ 0.7mm thickness The wall 15 and the primary heat insulating wall 11 and the secondary heat insulating wall 16 made of plywood boxes, perlites, etc. alternately on the inner surfaces 1 and 2 of the hull. Lamination is made.

상기 GT NO 96형의 경우, 1차 밀봉벽(10) 및 2차 밀봉벽(15)이 거의 같은 정도의 액밀성 및 강도를 갖고 있어 1차 밀봉벽(10)의 누설시 상당한 기간 동안 2차 밀봉벽(15)만으로도 화물을 안전하게 지탱할 수 있다. 또한 GT NO 96형의 밀봉벽(10, 15)은 멤브레인(Membrane)이 직선형이므로 TGZ Mark Ⅲ형의 파형 멤브레인보다 용접이 간편하여 자동화율은 높으나, 전체적인 용접장은 TGZ Mark Ⅲ형보다 길다. 또한, GT NO 96형의 경우 단열박스(즉, 단열벽, 11, 16)를 지지하기 위해서 더블 커플(Double Couple)(17)을 이용하고 있다. 프랑스 특허 제 2146612 호, 제 2629897 호, 제 2683786 호 등에는 종래의 GT NO 96형 단열박스의 구성과 고정방법 등이 개시되어 있다.In the case of the GT NO 96 type, the primary sealing wall 10 and the secondary sealing wall 15 have almost the same liquid-tightness and strength, so that the secondary sealing wall 10 is leaked for a considerable period of time. Only the sealing wall 15 can safely support the cargo. In addition, since the membranes of the GT NO 96 type 10 and 15 have a straight membrane, welding is easier than that of the TGZ Mark III type waveform membrane, and the automation rate is higher, but the overall welding length is longer than that of the TGZ Mark III type. In the case of the GT NO 96 type, a double couple 17 is used to support an insulation box (ie, insulation walls 11 and 16). French Patent Nos. 2146612, 2629897, 2683786 and the like disclose a configuration and fixing method of a conventional GT NO 96 type insulation box.

도 3에는 종래기술에 따른 GT NO 96형 저장탱크에 사용되는 단열박스의 사시도가 도시되어 있다. 도 3에 있어서 종래의 단열박스는, 그 내부구조를 나타내기 위해 상부 벽과 단열재가 제거된 상태로 도시되어 있다. 도 1 및 도 2에서의 1차 단열벽(11) 및 2차 단열벽(16)을 구성하는 종래의 GT NO 96형 단열박스(20)는 대략 직육면체 형상을 가진다.Figure 3 is a perspective view of a thermal insulation box used in the GT NO 96 storage tank according to the prior art. In FIG. 3, the conventional insulation box is shown with the top wall and insulation removed to show its internal structure. The conventional GT NO 96 type heat insulating box 20 constituting the primary heat insulating wall 11 and the secondary heat insulating wall 16 in FIGS. 1 and 2 has a substantially rectangular parallelepiped shape.

종래의 단열박스(20)의 내부에는 보강을 위하여 가로방향으로 연장되는 가로부재(21)가 다수개 설치되며, 단열박스(20)의 외부에는 단열박스(20)를 선체의 내부표면(1, 2) 상에 고정시키기 위한 고정부재(24)가 돌출 형성된다. 또한, LNG 누출을 대비해 불활성가스(예컨대 질소)를 순환시킬 수 있도록 단열박스(20)의 전방 및 후방벽 부재(22, 23)와 내부의 가로부재(21)에는 원형의 순환구멍(25)이 형성되어 있다.A plurality of horizontal members 21 extending in the horizontal direction for reinforcement are installed in the inside of the conventional heat insulation box 20, and the heat insulation box 20 is formed on the outer surface of the heat insulation box 20. 2) a fixing member 24 for fixing on the protrusion is formed. In addition, a circular circulation hole 25 is formed in the front and rear wall members 22 and 23 and the horizontal member 21 of the insulation box 20 to circulate inert gas (for example, nitrogen) in preparation for the leakage of LNG. Formed.

그런데, 이러한 종래의 GT NO 96형 단열박스(20)는, 고정부재(24)가 대략 직육면체 형상을 갖는 단열박스(20)의 외부에 돌출되어 있기 때문에, 복수의 단열박스(20)들을 배열할 때 단열박스(20) 사이에 공간이 형성될 수밖에 없는 구조를 가진다. 단열박스(20)가 설치된 후 단열박스(20) 사이의 공간은 별도의 단열재로 채워지는데, 단열재는 상당히 고가이므로 단열재의 사용을 절감할 수 있도록 개선할 필요가 있다.By the way, such a conventional GT NO 96 type heat insulating box 20, since the fixing member 24 is protruded to the outside of the heat insulating box 20 having a substantially rectangular parallelepiped shape, it is possible to arrange a plurality of heat insulating boxes 20. When the space between the insulating box 20 has no structure but can not be formed. After the insulation box 20 is installed, the space between the insulation boxes 20 is filled with a separate insulation, it is necessary to improve to reduce the use of insulation because the insulation is quite expensive.

또한, 고가의 재료인 플라이우드로 만들어지는 보강용 가로부재(21) 역시 단열박스에 요구되는 강도를 충족시키기 위해 단열박스(20)의 내부에 촘촘하게 배열되기 때문에 비경제적이다.In addition, the reinforcing horizontal member 21 made of plywood, which is an expensive material, is also uneconomical because it is densely arranged inside the insulating box 20 to satisfy the strength required for the insulating box.

또한, 단열박스(20)에 있어서 불활성가스의 순환을 위한 순환구멍(25)이 형성된 부분의 강도가 나머지 부분에 비해 상대적으로 취약하다는 점도 개선의 여지가 있다.In addition, there is room for improvement in that the strength of the portion in which the circulation hole 25 for circulation of the inert gas is formed in the heat insulation box 20 is relatively weak compared to the remaining portion.

이러한 종래의 문제점들을 해결하기 위한 본 발명은, 모서리 부분을 사선방향으로 절단한 후 이 절단부위에 단열박스 고정용 부재를 마련하는 등의 형상 개선을 통하여 고가인 플라이우드 및 단열재 등의 재료를 절감하고 설치작업을 단순화한 LNG 저장탱크용 단열박스를 제공하고자 하는 것이다.The present invention for solving the conventional problems, by cutting the corner portion in an oblique direction after reducing the material, such as expensive plywood and heat insulating material through the shape improvement, such as providing a member for fixing the insulation box on the cutting portion. And it is to provide an insulation box for LNG storage tank that simplified the installation work.

상기 목적을 달성하기 위한 본 발명에 따르면, LNG 저장탱크의 단열벽을 형성하기 위한 LNG 저장탱크용 단열박스로서, 상기 단열박스의 모서리를 사선방향으로 절단하고, 상기 단열박스의 사선으로 절단된 부분에 상기 단열박스를 선체에 고정시키기 위한 고정부재를 돌출 형성하여 설치시 인접한 단열박스와 밀착되는 것을 특징으로 하는 LNG 저장탱크용 단열박스가 제공된다.According to the present invention for achieving the above object, as a heat insulation box for LNG storage tank for forming a heat insulation wall of the LNG storage tank, the edge of the heat insulation box is cut in an oblique direction, the portion cut diagonally of the heat insulation box An insulation box for the LNG storage tank is provided, which is formed in close contact with the adjacent insulation box during installation by protruding a fixing member for fixing the insulation box to the hull.

상기 LNG 저장탱크용 단열박스는, 상기 단열박스의 내부에 보강을 위하여 격자 형태로 설치되는 보강부재를 포함하는 것이 바람직하다.The insulation box for the LNG storage tank, it is preferable to include a reinforcement member installed in the form of a grid for reinforcement inside the insulation box.

상기 보강부재는, 상기 단열박스의 가로방향으로 연장되는 복수의 가로부재와, 상기 단열박스의 세로방향으로 연장되는 복수의 세로부재를 포함하는 것이 바람직하다.The reinforcing member preferably includes a plurality of horizontal members extending in the horizontal direction of the heat insulating box, and a plurality of vertical members extending in the longitudinal direction of the heat insulating box.

상기 LNG 저장탱크용 단열박스는, LNG 누출을 대비해 불활성가스를 순환시킬 수 있도록 형성되는 상하로 긴 슬릿형 순환구멍을 포함하는 것이 바람직하다.Insulation box for the LNG storage tank, it is preferable to include a vertically long slit circulation hole formed to circulate the inert gas in preparation for the leakage of LNG.

상기 순환구멍은 상기 단열박스의 전방 및 후방벽 부재와 상기 단열박스 내 부의 보강용 가로부재에 형성되는 것이 바람직하다.The circulation hole is preferably formed in the front and rear wall members of the heat insulation box and the horizontal member for reinforcement inside the heat insulation box.

본 발명의 또 다른 측면에 따르면, LNG 저장탱크의 단열벽을 형성하기 위한 LNG 저장탱크용 단열박스로서, 모서리가 사선방향으로 절단된 직육면체 형태의 단열박스를 선체에 고정시키기 위하여 절단된 모서리 부분에 돌출 형성되는 고정부재와; 상기 단열박스의 내부에 보강을 위하여 격자 형태로 설치되는 보강부재와; LNG 누출을 대비해 불활성가스를 순환시킬 수 있도록 상기 단열박스의 벽면과 상기 보강부재에 형성되는 상하로 긴 슬릿형 순환구멍; 을 포함하는 것을 특징으로 하는 LNG 저장탱크용 단열박스가 제공된다.According to another aspect of the present invention, as an insulating box for the LNG storage tank for forming a heat insulating wall of the LNG storage tank, the corner box is cut in the diagonal shape to the insulation box of the rectangular parallelepiped shape to be cut to the hull portion A fixing member protrudingly formed; A reinforcing member installed in a lattice form to reinforce the inside of the insulating box; Vertically long slit-type circulation holes formed in the wall surface of the insulation box and the reinforcing member so as to circulate the inert gas in preparation for the leakage of LNG; There is provided an insulating box for the LNG storage tank comprising a.

상술한 바와 같은 본 발명에 의하면, 모서리 부분을 사선방향으로 절단한 후 이 절단부위에 단열박스 고정용 부재를 마련하는 등의 형상 개선을 통하여 고가인 플라이우드 및 단열재 등의 재료를 절감하고 설치작업을 단순화한 LNG 저장탱크용 단열박스가 제공될 수 있다.According to the present invention as described above, by cutting the corner portion in an oblique direction, to reduce the material such as expensive plywood and heat insulating material through the shape improvement, such as providing a member for fixing the heat insulation box on the cut portion, installation work Insulated box for LNG storage tank can be provided that is simplified.

이하, 본 발명의 바람직한 실시예에 따른 LNG 저장탱크용 단열박스를, 도면을 참조하여 상세하게 설명한다.Hereinafter, an insulating box for an LNG storage tank according to a preferred embodiment of the present invention will be described in detail with reference to the drawings.

도 4에는 본 발명에 따른 LNG 저장탱크용 단열박스의 사시도가 도시되어 있고, 도 5에는 본 발명에 따른 LNG 저장탱크용 단열박스들이 설치된 상태에 있어서 각각의 단열박스들의 모서리가 모여진 부분을 나타내는 도면이 도시되어 있다.Figure 4 is a perspective view of the insulating box for LNG storage tank according to the present invention, Figure 5 is a view showing a portion of the edge of each of the insulating boxes gathered in the state in which the insulating box for LNG storage tank according to the present invention is installed. Is shown.

도 4 및 도 5에 도시된 바와 같이, 본 발명에 따른 GT NO 96형 단열박스(30) 는 모서리 부분이 사선으로 절단된 직육면체 형상을 가진다. 도 4에 있어서 본 발명에 따른 단열박스(30)는 그 내부구조를 나타내기 위해 상부 벽과 내부에 충전되는 단열재가 제거된 상태로 도시되어 있다. 본 발명에 있어서 단열박스란, 내부에 충전되는 단열재를 포함하여 완성된 형태의 것이거나 단열재를 포함하지 않은 상태의 것을 모두 의미한다.As shown in Figure 4 and 5, the GT NO 96 type heat insulating box 30 according to the present invention has a rectangular parallelepiped shape of which the corner portion is cut diagonally. In FIG. 4, the heat insulation box 30 according to the present invention is shown with the top wall and the heat insulating material filled therein removed to show its internal structure. In the present invention, the heat insulation box means a thing of a completed form including a heat insulating material filled therein or a state of not containing a heat insulating material.

본 발명에 따른 단열박스(30)의 내부에는 보강을 위하여 가로방향으로 연장되는 복수의 가로부재(31)와 세로방향으로 연장되는 복수의 세로부재(32)가 설치된다. 본 발명에 따르면, 보강을 위하여 가로부재(31) 및 세로부재(32)를 함께 이용하여 가로부재(31)와 세로부재(32)를 격자 형태로 배열함으로써 고가의 재료인 플라이우드의 사용량을 절감하면서도 단열박스(30)에 요구되는 강도를 만족시킬 수 있게 한다.Inside the heat insulation box 30 according to the present invention, a plurality of horizontal members 31 extending in the horizontal direction and a plurality of vertical members 32 extending in the vertical direction are installed for reinforcement. According to the present invention, by using the horizontal member 31 and the vertical member 32 together for reinforcement, the horizontal member 31 and the vertical member 32 are arranged in a lattice form, thereby reducing the usage of expensive plywood materials. Yet it is possible to satisfy the strength required for the thermal insulation box (30).

격자 형태로 보강된 본 발명의 단열박스(30)는 선체의 외부로부터 가해지는 외력 또는 액체 상태의 LNG의 유동으로 인한 슬로싱 현상에 수반하는 충격력 등을 효과적으로 견딜 수 있다.The thermal insulation box 30 of the present invention reinforced with a lattice form can effectively withstand an external force applied from the outside of the hull or an impact force accompanying a sloshing phenomenon due to the flow of LNG in a liquid state.

또한, 단열박스(30)의 외부 중에서 사선으로 절단된 부분에는 단열박스(30)를 선체에 고정시키기 위한 고정부재(35)가 돌출 형성된다. 본 발명에 따르면, 고정부재(35)가 단열박스(30)의 절단된 모서리 부분에 형성되기 때문에 복수의 단열박스(30)들을 배열할 때 단열박스(30) 사이의 공간을 제거할 수 있다. 즉, 도 5에 도시된 바와 같이, 복수의 단열박스(30)들은 각각의 좌우측벽과 전후방벽이 서로 밀착된 상태로 배열될 수 있다.In addition, a fixing member 35 for fixing the heat insulation box 30 to the hull is protruded from a portion cut diagonally from the outside of the heat insulation box 30. According to the present invention, since the fixing member 35 is formed at the cut edge of the insulating box 30, the space between the insulating boxes 30 can be removed when arranging the plurality of insulating boxes 30. That is, as shown in FIG. 5, the plurality of heat insulation boxes 30 may be arranged in a state in which the left and right side walls and the front and rear walls are in close contact with each other.

따라서 본 발명의 단열박스(30)에 의하면, 종래에서와 같이 별도의 단열재를 사용하여 단열박스들 사이의 공간을 채워줄 필요가 없으므로, 고가의 단열재를 절감할 수 있는 동시에 설치작업을 간소화할 수 있게 된다.Therefore, according to the heat insulation box 30 of the present invention, since it is not necessary to fill the space between the heat insulation boxes using a separate heat insulating material as in the prior art, it is possible to reduce the expensive heat insulating material and at the same time simplify the installation work. do.

또한, LNG 누출을 대비해 불활성가스(예컨대 질소)를 순환시킬 수 있도록 본 발명에 따른 단열박스(30)의 전방 및 후방벽 부재(33, 34)와 내부의 가로부재(31)에는 상하로 긴 슬릿형의 순환구멍(36)이 형성되어 있다. 단열박스(30)의 전방 및 후방벽 부재(33, 34)와 내부의 가로부재(31)에 형성되는 순환구멍(36)들은 일직선 상으로 정렬되는 것이 바람직하다.In addition, in order to circulate the inert gas (for example, nitrogen) in preparation for the leakage of LNG, the slits vertically long in the front and rear wall members 33 and 34 and the horizontal member 31 of the insulating box 30 according to the present invention. A circular circulation hole 36 is formed. The circulation holes 36 formed in the front and rear wall members 33 and 34 of the heat insulation box 30 and the horizontal member 31 therein are preferably aligned in a straight line.

단열박스(30)에는 압축하중이 주로 작용하는데, 종래와 같은 원형의 순환구멍은 압축좌굴에 상대적으로 취약하다. 본 발명에 의하면, 순환구멍(36)이 상하로 긴 슬릿 형상을 가지기 때문에, 종래와 동일한 순환면적을 가지는 경우에도 압축하중에 대한 강도가 더욱 보강될 수 있어 압축좌굴로 인한 손상을 확실하게 방지할 수 있게 된다.Compression load mainly acts on the insulation box 30, and the circular circulation hole as in the prior art is relatively vulnerable to compression buckling. According to the present invention, since the circulation hole 36 has a long slit shape up and down, even when having the same circulation area as in the prior art, the strength against the compression load can be further reinforced, so that damage due to compression buckling can be reliably prevented. It becomes possible.

이상과 같이 본 발명에 따른 LNG 저장탱크용 단열박스를, 예시된 도면을 참조하여 설명하였으나, 본 발명은 이상에서 설명된 실시예와 도면에 의해 한정되지 않으며, 특허청구범위 내에서 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자들에 의해 다양한 수정 및 변형이 이루어질 수 있음은 물론이다.As described above, the insulating box for an LNG storage tank according to the present invention has been described with reference to the illustrated drawings, but the present invention is not limited to the above-described embodiments and drawings, and the present invention belongs to the claims. Of course, various modifications and variations can be made by those skilled in the art.

도 1 및 도 2는 종래기술에 따른 LNG 저장탱크의 구조인 GT NO 96형 저장탱크 구조의 단면도 및 사시도, 1 and 2 are a cross-sectional view and a perspective view of the structure of the GT NO 96 storage tank structure of the LNG storage tank according to the prior art,

도 3은 GT NO 96형 저장탱크에 사용되는 종래의 단열박스의 사시도, 3 is a perspective view of a conventional heat insulation box used for the GT NO 96 storage tank,

도 4는 본 발명에 따른 LNG 저장탱크용 단열박스의 사시도, 그리고 4 is a perspective view of an insulating box for an LNG storage tank according to the present invention, and

도 5는 본 발명에 따른 LNG 저장탱크용 단열박스들이 설치된 상태에 있어서 각각의 단열박스들의 모서리가 모여진 부분을 나타내는 도면이다.5 is a view showing a corner of each of the insulation box is collected in the state in which the insulation box for the LNG storage tank according to the present invention is installed.

< 도면의 주요 부분에 대한 부호의 설명>Description of the Related Art

30 : 단열박스 31 : 가로부재30: insulation box 31: horizontal member

32 : 세로부재 33 : 전방벽 부재32: vertical member 33: front wall member

34 : 후방벽 부재 35 : 고정부재34: rear wall member 35: fixing member

36 : 순환구멍36: circulation hole

Claims (6)

LNG 저장탱크의 단열벽을 형성하기 위한 LNG 저장탱크용 단열박스로서, Insulation box for LNG storage tank for forming an insulation wall of the LNG storage tank, 상기 단열박스의 모서리를 사선방향으로 절단하고, 상기 단열박스의 사선으로 절단된 부분에 상기 단열박스를 선체에 고정시키기 위한 고정부재를 돌출 형성하여 설치시 인접한 단열박스와 밀착되는 것을 특징으로 하는 LNG 저장탱크용 단열박스.LNG, characterized in that the edge of the insulation box is cut diagonally, protruding a fixing member for fixing the insulation box to the hull in the portion cut diagonally of the insulation box is in close contact with the adjacent insulation box during installation. Insulation box for storage tank. 청구항 1에 있어서, The method according to claim 1, 상기 단열박스의 내부에 보강을 위하여 격자 형태로 설치되는 보강부재를 포함하는 것을 특징으로 하는 LNG 저장탱크용 단열박스.Insulation box for LNG storage tank, characterized in that it comprises a reinforcement member installed in the form of a grid for reinforcement inside the insulation box. 청구항 2에 있어서, The method according to claim 2, 상기 보강부재는, 상기 단열박스의 가로방향으로 연장되는 복수의 가로부재와, 상기 단열박스의 세로방향으로 연장되는 복수의 세로부재를 포함하는 것을 특징으로 하는 LNG 저장탱크용 단열박스.The reinforcing member, the insulating box for the LNG storage tank, characterized in that it comprises a plurality of horizontal members extending in the horizontal direction of the insulating box, and a plurality of vertical members extending in the longitudinal direction of the insulating box. 청구항 1에 있어서, The method according to claim 1, LNG 누출을 대비해 불활성가스를 순환시킬 수 있도록 형성되는 상하로 긴 슬릿형 순환구멍을 포함하는 것을 특징으로 하는 LNG 저장탱크용 단열박스.Insulation box for LNG storage tank, characterized in that it comprises a vertically long slit circulation hole formed to circulate the inert gas in preparation for the leakage of LNG. 청구항 4에 있어서, The method according to claim 4, 상기 순환구멍은 상기 단열박스의 전방 및 후방벽 부재와 상기 단열박스 내부의 보강용 가로부재에 형성되는 것을 특징으로 하는 LNG 저장탱크용 단열박스.The circulation hole is an insulating box for LNG storage tank, characterized in that formed in the front and rear wall members of the heat insulating box and the horizontal member for reinforcement inside the heat insulating box. LNG 저장탱크의 단열벽을 형성하기 위한 LNG 저장탱크용 단열박스로서, Insulation box for LNG storage tank for forming an insulation wall of the LNG storage tank, 모서리가 사선방향으로 절단된 직육면체 형태의 단열박스를 선체에 고정시키기 위하여 절단된 모서리 부분에 돌출 형성되는 고정부재와; A fixing member protruding from the cut edge portion to fix the insulating box having a rectangular parallelepiped shape in which the edge is cut diagonally to the hull; 상기 단열박스의 내부에 보강을 위하여 격자 형태로 설치되는 보강부재와; A reinforcing member installed in a lattice form to reinforce the inside of the insulating box; LNG 누출을 대비해 불활성가스를 순환시킬 수 있도록 상기 단열박스의 벽면과 상기 보강부재에 형성되는 상하로 긴 슬릿형 순환구멍; 을 포함하는 것을 특징으로 하는 LNG 저장탱크용 단열박스.Vertically long slit-type circulation holes formed in the wall surface of the insulation box and the reinforcing member so as to circulate the inert gas in preparation for the leakage of LNG; Insulation box for LNG storage tank comprising a.
KR1020080096357A 2008-10-01 2008-10-01 Insulation box for a lng storage tank KR101012644B1 (en)

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
FR2987424A1 (en) * 2012-02-23 2013-08-30 Gaztransp Et Technigaz INSULATING BOX COMPRISING A SPACE OF FLOW
WO2014167206A1 (en) * 2013-04-11 2014-10-16 Gaztransport Et Technigaz Insulating block for producing a sealed and insulated tank wall
KR20160002839U (en) 2015-02-06 2016-08-17 대우조선해양 주식회사 Lng storage tank and insulation box thereof
KR20160096994A (en) 2015-02-06 2016-08-17 대우조선해양 주식회사 Lng storage tank and insulation box thereof

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KR101713854B1 (en) 2014-05-28 2017-03-09 대우조선해양 주식회사 Insulation box of lng storage tank
KR102213510B1 (en) 2014-07-07 2021-02-09 주식회사 디섹 Insulation box of lng storage tank

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FR2146612A5 (en) * 1971-07-21 1973-03-02 Bourgeois Michel Resilient fixing element - for use in liquefied gas tanker construction
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FR2798902B1 (en) * 1999-09-29 2001-11-23 Gaz Transport & Technigaz WATERPROOF AND THERMALLY INSULATING TANK INTEGRATED INTO A VESSEL CARRIER STRUCTURE AND METHOD OF MANUFACTURING INSULATING BOXES FOR USE IN THIS TANK

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2987424A1 (en) * 2012-02-23 2013-08-30 Gaztransp Et Technigaz INSULATING BOX COMPRISING A SPACE OF FLOW
WO2013124597A3 (en) * 2012-02-23 2014-06-12 Gaztransport Et Technigaz Insulating box comprising a flow space
WO2014167206A1 (en) * 2013-04-11 2014-10-16 Gaztransport Et Technigaz Insulating block for producing a sealed and insulated tank wall
FR3004508A1 (en) * 2013-04-11 2014-10-17 Gaztransp Et Technigaz INSULATING BLOCK FOR THE MANUFACTURE OF A WATERPROOF AND INSULATED TANK WALL
KR20160002839U (en) 2015-02-06 2016-08-17 대우조선해양 주식회사 Lng storage tank and insulation box thereof
KR20160096994A (en) 2015-02-06 2016-08-17 대우조선해양 주식회사 Lng storage tank and insulation box thereof

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