KR100314193B1 - Membrane for Storage Tank Containing Liquid Natural Gas - Google Patents

Membrane for Storage Tank Containing Liquid Natural Gas Download PDF

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Publication number
KR100314193B1
KR100314193B1 KR1019990029326A KR19990029326A KR100314193B1 KR 100314193 B1 KR100314193 B1 KR 100314193B1 KR 1019990029326 A KR1019990029326 A KR 1019990029326A KR 19990029326 A KR19990029326 A KR 19990029326A KR 100314193 B1 KR100314193 B1 KR 100314193B1
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South Korea
Prior art keywords
central
membrane
space
natural gas
pleat portion
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KR1019990029326A
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Korean (ko)
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KR20010010438A (en
Inventor
김청균
김영균
서흥석
홍성호
윤인수
오병택
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한갑수
한국가스공사
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Priority to KR1019990029326A priority Critical patent/KR100314193B1/en
Priority to CNB99125211XA priority patent/CN1146702C/en
Publication of KR20010010438A publication Critical patent/KR20010010438A/en
Application granted granted Critical
Publication of KR100314193B1 publication Critical patent/KR100314193B1/en

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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
    • F17C3/00—Vessels not under pressure
    • F17C3/02—Vessels not under pressure with provision for thermal insulation
    • F17C3/025—Bulk storage in barges or on ships
    • F17C3/027—Wallpanels for so-called membrane tanks
    • 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
    • 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
    • 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)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

본 발명은 액화천연가스 저장탱크용으로 사용되는 회전 열변형 거동방식의 개선된 T자형 멤브레인에 관한 것으로서,The present invention relates to an improved T-shaped membrane of a rotational heat deflection behavior for use in liquefied natural gas storage tanks.

동일한 크기 및 형태를 가지며 서로 평행하게 직선으로 형성된 측면 주름부(21,22)와, 상기 측면 주름부(21,22) 사이에서 일정한 공간을 두고 직선으로 연장되며 상기 측면 주름부(21,22)와 동일한 길이를 가지는 중앙 상부 주름부(23)와, 상기 중앙 주름부(23)와 일정한 간격을 두고 동일한 방향으로 배치되는 중앙 하부 주름부(24)와, 상기 중앙 상부 주름부(23)의 하단과 상기 중앙 하부 주름부(24)의 상단과 측면 주름부(21,22) 사이에는 공간이 형성되며 이 공간의 중앙에 형성된 앵커구멍(25)으로 구성된 수평 및 수직 주름부가 서로 엇갈리게 배치된다. 이것에 의해서, 동일한 구조의 수직 및 수평 주름부를 서로 엇갈리게 배치하고, 각각의 단위 주름부의 중앙에 앵커구멍을 형성시켜 앵커에 걸리는 응력을 최소화시킬 수 있도록 열변형 거동 패튼이 회전하게 되는 효과가 있다.Side wrinkles 21 and 22 having the same size and shape and formed in a straight line in parallel with each other, and extend in a straight line with a predetermined space between the side wrinkles 21 and 22 and the side wrinkles 21 and 22. A central upper pleat portion 23 having the same length as that, a lower central pleat portion 24 disposed in the same direction at regular intervals from the central pleat portion 23, and a lower end of the central upper pleat portion 23. And a space is formed between the upper and side pleats 21 and 22 of the central lower pleat 24 and the horizontal and vertical pleats formed of anchor holes 25 formed in the center of the space are staggered from each other. Thereby, the heat deformation behavior pattern is rotated so that the vertical and horizontal corrugations of the same structure are staggered with each other, and the anchor holes are formed in the center of each unit corrugation to minimize the stress applied to the anchor.

Description

액화천연가스 저장탱크용 멤브레인{Membrane for Storage Tank Containing Liquid Natural Gas}Membrane for Storage Tank Containing Liquid Natural Gas}

본 발명은 액화천연가스 저장탱크용 멤브레인에 관한 것으로서, 보다 상세히는 액화천연가스 저장탱크용으로 사용되는 회전 열변형 거동방식의 개선된 T자형 멤브레인에 관한 것이다.The present invention relates to a membrane for a liquefied natural gas storage tank, and more particularly to an improved T-shaped membrane of a rotational thermal deformation behavior used for a liquefied natural gas storage tank.

액화천연가스 저장탱크에서 멤브레인 유니트는 기계적 하중, LNG의 가스 압력과 액하중을 받으면서 동시에 -162℃의 초저온 액체와 접촉하기 때문에 발생되는 온도 하중에 안전하게 견디어야 하고, LNG의 누설을 방지할 수 있도록 설계된 특수 구조물로서 저장탱크의 벽면 및 바닥면에 설치된다.In the LNG storage tank, the membrane unit is subjected to mechanical load, gas pressure and liquid load of LNG, and at the same time, it must safely withstand the temperature load generated because it comes into contact with cryogenic liquid at -162 ℃, and can prevent leakage of LNG. Special designed structures are installed on the wall and bottom of the storage tank.

종래의 경우를 도 1 및 도 2를 참조하여 설명하기로 한다.A conventional case will be described with reference to FIGS. 1 and 2.

도 1은 종래의 가와사끼형 멤브레인을 도시한 평면도로서, 한쌍의 주름부(3,4)가 서로 이격되어 평행하게 배치되어 있고, 수직의 한쌍의 주름부 중앙에 수평의 한쌍의 주름부가 맞닿지 않게 배치되고, 수직 및 수평의 각각의 한쌍의 주름부 중앙에 탱크의 내벽에 앵커(도시 않음)로써 고정하기 위한 앵커 구멍(5)이 형성된다. 이러한 구성에 의해서 탱크내에 압력으로 인하여 멤브레인이 수축되면 각각의 주름부는 점선으로 표시된 것과 같이 회전된다.1 is a plan view showing a conventional Kawasaki-type membrane, in which a pair of wrinkles 3 and 4 are arranged in parallel with each other, and a pair of horizontal wrinkles do not contact the center of a pair of vertical wrinkles. The anchor hole 5 is formed in the center of each pair of corrugations, vertical and horizontal, for fixing with an anchor (not shown) on the inner wall of the tank. With this configuration, when the membrane contracts due to pressure in the tank, each corrugation portion is rotated as indicated by the dotted line.

도 2는 종래의 미쯔비시형 멤브레인을 도시한 사시도로서,삼각형상의 주름부(5)가 수평 및 수직으로 서로 엇갈리게 배치되고, 수평과 수직의 주름부(5,6) 중앙에 탱크의 내벽에 앵커(도시 않음)로써 고정하기 위한 앵커 구멍(7)이 형성된다. 수직 및 수평의 주름부가 완전히 교차됨으로써 신축성이 좋게된다.2 is a perspective view of a conventional Mitsubishi-type membrane, wherein the triangular corrugations 5 are alternately arranged horizontally and vertically, and anchored to the inner wall of the tank at the center of the corrugations 5,6 of the horizontal and vertical. Anchor holes 7 for fastening). The elasticity is good because the vertical and horizontal creases completely intersect.

상기 2종류의 멤브레인은 앵커 구멍을 모두 수직 및 수평 주름부로 이루어지는 폐쇄 공간내의 중앙에 형성시켜 열변형 거동에 따른 회전 안정성을 확보토록 한 것이나, 이러한 멤브레인 유니트들은 회전 변형 거동이 하중 조건에 따라 비대칭적으로 불균일하게 변형된다면 앵커부위에는 큰 응력집중이 걸리기 때문에 이곳에서의 안정성이 크게 위협받게 되는 문제점이 있다.The two types of membranes form anchor holes at the center in a closed space consisting of both vertical and horizontal corrugations to ensure rotational stability due to thermal deformation behavior. However, these membrane units have asymmetrical rotational deformation behavior depending on load conditions. If it is deformed unevenly, there is a problem that the stability is greatly threatened because the anchor portion takes a large stress concentration.

본 발명에 따른 액화천연가스 저장탱크용 멤브레인은 상술한 종래의 문제점을 극복하기 위한 것으로서, 본 발명의 목적은 앵커 구멍을 수평 및 수직 주름부의 중심부에 형성시켜 수직 주름부에 의하여 외부의 하중을 모두 받도록하여 앵커에 걸리는 응력집중 문제를 해결하는 액화천연가스 저장탱크용 멤브레인을 제공하는데 있다.Membrane for liquefied natural gas storage tank according to the present invention is to overcome the above-mentioned conventional problems, an object of the present invention is to form an anchor hole in the center of the horizontal and vertical corrugated portion, all the external load by the vertical corrugated portion It is to provide a membrane for a liquefied natural gas storage tank that solves the problem of stress concentration on the anchor.

상기 본 발명의 목적을 달성하기 위한 본 발명에 따른 액화천연가스 저장탱크용 멤브레인의 일예로써,As an example of a membrane for a liquefied natural gas storage tank according to the present invention for achieving the object of the present invention,

동일한 크기 및 형태를 가지며 서로 평행하게 직선으로 형성된 측면 주름부와, 상기 측면 주름부 사이에서 일정한 공간을 두고 직선으로 연장되며 상기 측면 주름부와 동일한 길이를 가지는 중앙 상부 주름부와, 상기 중앙 주름부와 일정한간격을 두고 동일한 방향으로 배치되는 중앙 하부 주름부와, 상기 중앙 상부 주름부의 하단과 상기 중앙 하부 주름부의 상단과 측면 주름부 사이에는 공간이 형성되며 이 공간의 중앙에 형성된 앵커구멍으로 구성된 수평 및 수직 주름부가 서로 엇갈리게 배치되는 것을 특징으로 한다.A lateral pleat having the same size and shape and formed in a straight line parallel to each other, a central upper pleated portion extending in a straight line with a predetermined space between the lateral pleated portions and having the same length as the lateral pleated portion; A horizontal space formed by a central lower pleat portion disposed in the same direction at regular intervals and a lower end of the central upper pleat portion, and an upper end of the central lower pleat portion and a side pleat portion; And vertical pleats are staggered from each other.

또한, 본 발명에 따른 액화천연가스 저장탱크용 멤브레인의 일예로써, 2개의 수평 주름부와 2개의 수직 주름부에 의해서 하나의 폐공간이 형성되고, 폐공간의 길이(D)의 1/2 이상의 길이로 측면주름부의 길이(E)가 차지하는 것을 특징으로 한다.In addition, as an example of the membrane for a liquefied natural gas storage tank according to the present invention, one closed space is formed by two horizontal corrugations and two vertical corrugations, and is equal to or greater than 1/2 of the length D of the closed space. It is characterized in that the length (E) of the side wrinkle portion in the length occupies.

더욱이, 본 발명에 따른 액화천연가스 저장탱크용 멤브레인의 일예로써,Moreover, as an example of a membrane for a liquefied natural gas storage tank according to the present invention,

각각의 단위 주름부는 모두 동일한 단면 형상을 가지며, 이 단면 형상은 반원 또는 타원형인 것이다.Each unit corrugation has the same cross-sectional shape, which is semicircular or elliptical.

도 1은 종래의 가와사끼형 멤브레인을 도시한 평면도1 is a plan view showing a conventional Kawasaki-type membrane

도 2는 종래의 미쯔비시형 멤브레인을 도시한 사시도Figure 2 is a perspective view of a conventional Mitsubishi-type membrane

도 3은 본 발명에 따른 액화천연가스 저장탱크용 멤브레인를 도시한 사시도Figure 3 is a perspective view showing a membrane for a liquefied natural gas storage tank according to the present invention

도 4는 본 발명에 따른 액화천연가스 저장탱크용 멤브레인를 도시한 평면도Figure 4 is a plan view showing a membrane for a liquefied natural gas storage tank according to the present invention

도 5는 도 4의 A-A선에 따른 단면도5 is a cross-sectional view taken along the line A-A of FIG.

도 6은 도 4의 B-B선에 따른 단면도6 is a cross-sectional view taken along the line B-B of FIG.

< 도면의 주요 부분에 대한 부호의 설명 ><Description of Symbols for Main Parts of Drawings>

3,4,5,6,21,22,23,24 : 주름부3,4,5,6,21,22,23,24: wrinkles

5,7,25 : 앵커구멍5,7,25: anchor hole

이하, 본 발명의 실시예를 첨부한 도면을 참조하여 설명하기로 한다.Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

도 3 및 도 4를 참조하면, 본 발명에 따른 액화천연가스 저장탱크용 멤브레인이 도시되어 있다. 본 발명에 따른 액화천연가스 저장탱크용 멤브레인은 수직 주름부와 상기 수직 주름부와 동일한 형태의 수평 주름부로 이루어진다.3 and 4, there is shown a membrane for a liquefied natural gas storage tank according to the present invention. Membrane for liquefied natural gas storage tank according to the present invention consists of a vertical wrinkles and horizontal wrinkles of the same shape as the vertical wrinkles.

상기 수직 주름부는 동일한 크기 및 형태를 가지며 서로 평행하게 직선으로형성된 측면 주름부(21,22)와, 상기 주름부(21,22) 사이에서 일정한 공간을 두고 직선으로 연장되며 상기 주름부(21,22)와 동일한 길이를 가지는 중앙 상부 주름부(23)와, 상기 중앙 주름부(23)와 일정한 간격을 두고 동일한 방향으로 배치되는 중앙 하부 주름부(24)로 구성된다.The vertical wrinkles have the same size and shape and extend in a straight line with a predetermined space between the side wrinkles 21 and 22 formed in a straight line parallel to each other, and between the wrinkles 21 and 22. It is composed of a central upper wrinkled portion 23 having the same length as 22, and a central lower wrinkled portion 24 disposed in the same direction at regular intervals from the central wrinkled portion 23.

상기 중앙 상부 주름부(23)의 하단과 상기 중앙 하부 주름부(24)의 상단과 측면 주름부(21,22) 사이에는 공간이 형성되며 이 공간의 중앙에 앵커구멍(25)이 형성된다.A space is formed between the lower end of the central upper wrinkled portion 23, the upper end of the central lower wrinkled portion 24, and the side wrinkled portions 21 and 22, and an anchor hole 25 is formed in the center of the space.

상기 수평 주름부는 상기 수직 주름부와 동일한 형태로서 수직 주름부의 측면 양중앙, 중앙 상부 주름부(23)의 상부 및 중앙 하부 주름부(24)의 하부에 엇갈리게 위치하게 된다.The horizontal pleats are staggered in the same shape as the vertical pleats and are staggered on both sides of the vertical pleats, the upper part of the central upper pleats 23, and the lower part of the center lower pleats 24.

이렇게 2개의 수평 주름부와 2개의 수직 주름부에 의해서 하나의 폐공간이 형성되고, 폐공간의 길이(D)의 1/2 이상의 길이로 측면주름부(22)의 길이(E)가 차지한다.Thus, one closed space is formed by the two horizontal corrugations and the two vertical corrugations, and the length E of the side wrinkles 22 occupies a length of 1/2 or more of the length D of the closed space. .

도 5 및 도 6을 참조하면, 각각의 단위 주름부는 모두 동일한 단면 형상을 가지며, 이 단면 형상은 반원 또는 타원형이 될 수 있다.5 and 6, each of the unit corrugations have the same cross-sectional shape, the cross-sectional shape may be a semi-circle or oval.

상기와 같은 구성에 의해서 본 발명에 따른 액화천연가스 저장탱크용 멤브레인은 하나의 수직 주름부와 하나의 수평 주름부가 T자형을 이루게되며, 이들 주름부는 3겹의 주름부(21, 23, 22 또는 21, 24, 22)로 이루어지는 부위를 형성하고, 하나의 폐공간을 중심으로 볼 때 측면 주름부(22)가 서로 엇갈리게 배열되고, 또한 폐공간의 길이(D)의 절반 이상의 길이(E)로 연장되어 측면 주름부(22)의 단부에서 발생되는 응력 집중 현상을 방지하고 있다.By the above configuration, the membrane for liquefied natural gas storage tank according to the present invention forms one vertical wrinkle portion and one horizontal wrinkle portion in a T-shape, and these wrinkle portions are three-ply wrinkle portions 21, 23, 22 or 21, 24, 22, and the side wrinkles 22 are arranged to be staggered with each other when viewed from one lung space, and the length E of at least half of the length D of the lung space (E). It extends and prevents the stress concentration phenomenon which generate | occur | produces in the edge part of the side wrinkle part 22.

또한 중앙 주름부(23, 24)가 서로 단락이 되도록 설계하고, 이 단락된 부분에 앵커 구멍(25)을 형성하여, 이 앵커 구멍이 설치되는 앵커(도시 않음)에 응력이 집중되지 않도록 하고 있다.In addition, the center corrugations 23 and 24 are designed to be short-circuited with each other, and an anchor hole 25 is formed in this short-circuited portion so that stress is not concentrated on the anchor (not shown) in which the anchor hole is provided. .

즉, 외부로부터의 하중 조건이 달라지더라도 주름부로 포위된 앵커구멍(25)에서 열변형이 가장 작게 발생되므로 앵커 구멍(25)에 앵커를 안정하게 설치할 수 있게 된다. 즉 앵커는 외부의 변형된 하중에 대하여 주위의 주름부에 의해서 항상 보호를 받고 있기 때문에 안전하다.That is, even if the load conditions from the outside is different, the thermal deformation is the smallest in the anchor hole 25 surrounded by the pleats, so that the anchor can be stably installed in the anchor hole 25. In other words, the anchor is safe because it is always protected by the surrounding wrinkles against externally deformed loads.

도 4에서 점선으로 표시된 부분은 탱크내에 압력으로 인하여 멤브레인이 수축될 때 각각의 주름부가 회전된 상태를 도시한다. 따라서 앵커 부위는 가장 작게 변형되는 것이다.The part indicated by the dotted line in FIG. 4 shows the state in which the respective corrugations are rotated when the membrane is contracted due to the pressure in the tank. Therefore, the anchor site is the smallest deformation.

상술한 바와같이, 본 발명에 따른 액화천연가스 저장탱크용 멤브레인은 동일한 구조의 수직 및 수평 주름부를 서로 엇갈리게 배치하고, 각각의 단위 주름부의 중앙에 앵커구멍을 형성시켜 앵커에 걸리는 응력을 최소화시킬 수 있도록 열변형거동 패튼이 회전하게 되는 효과가 있다.As described above, the membrane for liquefied natural gas storage tank according to the present invention can be arranged to stagger the vertical and horizontal corrugations of the same structure to each other, and to form an anchor hole in the center of each unit corrugation portion to minimize the stress applied to the anchor The heat deformation behavior patten is rotated.

이상에서 설명한 것은 본 발명에 따른 액화천연가스 저장탱크용 멤브레인을 실시하기 위한 하나의 실시예에 불과한 것으로서, 본 발명은 상기한 실시예에 한정되지 않고, 이하의 특허청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 분야에서 통상의 지식을 가진 자가라면 누구든지 다양한 변경 실시가 가능할 것이다.What has been described above is just one embodiment for carrying out the membrane for the liquefied natural gas storage tank according to the present invention, the present invention is not limited to the above embodiment, of the present invention as claimed in the following claims Various changes can be made by those skilled in the art without departing from the gist of the present invention.

Claims (3)

동일한 크기 및 형태를 가지며 서로 평행하게 직선으로 형성된 측면 주름부(21,22)와, 상기 측면 주름부(21,22) 사이에서 일정한 공간을 두고 직선으로 연장되며 상기 측면 주름부(21,22)와 동일한 길이를 가지는 중앙 상부 주름부(23)와, 상기 중앙 주름부(23)와 일정한 간격을 두고 동일한 방향으로 배치되는 중앙 하부 주름부(24)와, 상기 중앙 상부 주름부(23)의 하단과 상기 중앙 하부 주름부(24)의 상단과 측면 주름부(21,22) 사이에는 공간이 형성되며 이 공간의 중앙에 형성된 앵커구멍(25)으로 구성된 수평 및 수직 주름부가 서로 엇갈리게 배치되는 것을 특징으로 하는 액화천연가스 저장탱크용 멤브레인.Side wrinkles 21 and 22 having the same size and shape and formed in a straight line in parallel with each other, and extend in a straight line with a predetermined space between the side wrinkles 21 and 22 and the side wrinkles 21 and 22. A central upper pleat portion 23 having the same length as that, a lower central pleat portion 24 disposed in the same direction at regular intervals from the central pleat portion 23, and a lower end of the central upper pleat portion 23. And a space is formed between the upper and side pleats 21 and 22 of the central lower pleat 24 and the horizontal and vertical pleats formed of anchor holes 25 formed in the center of the space are alternately arranged. Membrane for LNG storage tanks. 제 1 항에 있어서,The method of claim 1, 2개의 수평 주름부와 2개의 수직 주름부에 의해서 하나의 폐공간이 형성되고, 폐공간의 길이(D)의 1/2 이상의 길이로 측면주름부의 길이(E)가 차지하는 것을 특징으로 하는 액화천연가스 저장탱크용 멤브레인.One closed space is formed by two horizontal folds and two vertical folds, and the length (E) of the side folds occupies a length of at least 1/2 of the length (D) of the closed space. Membrane for gas storage tanks. 제 1 항에 있어서,The method of claim 1, 각각의 단위 주름부는 모두 동일한 단면 형상을 가지며, 이 단면 형상은 반원 또는 타원형인 것을 특징으로 하는 액화천연가스 저장탱크용 멤브레인.Each unit corrugation has the same cross-sectional shape, the cross-sectional shape is a semi-circular or elliptical membrane for liquefied natural gas storage tank, characterized in that.
KR1019990029326A 1999-07-20 1999-07-20 Membrane for Storage Tank Containing Liquid Natural Gas KR100314193B1 (en)

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