KR100707675B1 - Membrane Metal Panel of Insulated LNG Tank - Google Patents

Membrane Metal Panel of Insulated LNG Tank Download PDF

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Publication number
KR100707675B1
KR100707675B1 KR1020040021526A KR20040021526A KR100707675B1 KR 100707675 B1 KR100707675 B1 KR 100707675B1 KR 1020040021526 A KR1020040021526 A KR 1020040021526A KR 20040021526 A KR20040021526 A KR 20040021526A KR 100707675 B1 KR100707675 B1 KR 100707675B1
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South Korea
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corrugation
corrugations
metal panel
panel
unit
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KR1020040021526A
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Korean (ko)
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KR20050096357A (en
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민계식
김외현
최익흥
원선일
김병만
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현대중공업 주식회사
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Priority to KR1020040021526A priority Critical patent/KR100707675B1/en
Priority to JP2007506068A priority patent/JP4564051B2/en
Priority to EP04808205A priority patent/EP1732828B1/en
Priority to PCT/KR2004/003028 priority patent/WO2005095234A1/en
Publication of KR20050096357A publication Critical patent/KR20050096357A/en
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    • 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
    • B65D90/08—Interconnections of wall parts; Sealing means therefor
    • 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
    • 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
    • B65D90/027—Corrugated or zig-zag structures; Folded plate
    • 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
    • B65D90/028—Wall construction hollow-walled, e.g. double-walled with spacers
    • 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
    • F17C2209/221—Welding
    • 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
    • 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
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/033—Small pressure, e.g. for liquefied gas
    • 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
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water
    • F17C2270/0105—Ships
    • F17C2270/0107—Wall panels

Abstract

본 발명은 LNG 저장탱크의 멤브레인 금속패널에 관한 것이며, 그 목적은 금속패널의 응력집중 부위를 분산하고 집중도를 완화함으로써 안정성을 증대하고, 금속패널과 금속패널의 겹침 용접부의 코러게이션 개수를 감소시켜 굴곡 용접 개소의 감소로 용접성을 향상시킬 수 있는 LNG 저장탱크의 멤브레인 금속패널을 제공함에 있다.The present invention relates to a membrane metal panel of an LNG storage tank, the object of which is to increase the stability by dispersing the stress concentration portion of the metal panel and to reduce the concentration, and to reduce the number of corrugations of the overlap welding portion of the metal panel and metal panel The present invention provides a membrane metal panel of an LNG storage tank capable of improving weldability due to a reduction in bending welding points.

본 발명은 패널로부터 볼록하게 융기된 가로변과 세로변이 조합되어 사각띠형상의 평면구조로 이루어지며, 상호 일정간격을 이루도록 형성된 다수의 단위코러게이션과, 상기 다수의 단위코러게이션을 상호 연결하는 종·횡방향 연결코러게이션과, 상기 다수의 단위코러게이션으로부터 패널의 4변 끝단으로 각각 연장되는 연장코러게이션으로 구성된 LNG 저장탱크의 멤브레인 금속패널에 관한 것을 그 기술적 요지로 한다.
The present invention has a planar structure having a rectangular band shape by combining the lateral and vertical sides raised from the panel convexly, and a plurality of unit corrugations formed to form a predetermined interval with each other, and a type of interconnecting the plurality of unit corrugations. The technical gist of the membrane metal panel of the LNG storage tank consisting of a lateral connecting corrugation and an extension corrugation extending from the plurality of unit corrugations to the four sides of the panel, respectively.

LNG저장탱크, 멤브레인, 금속패널, 코러게이션, 연결부 LNG storage tank, membrane, metal panel, corrugation, connection

Description

ＬＮＧ 저장탱크의 멤브레인 금속패널{Membrane Metal Panel of Insulated LNG Tank} Membrane Metal Panel of Insulated LNG Tank             

도 1 은 본 발명에 따른 금속패널의 형상을 나타낸 사시도1 is a perspective view showing the shape of a metal panel according to the present invention

도 2 는 본 발명에 따른 금속패널의 형상을 나타낸 평면도Figure 2 is a plan view showing the shape of the metal panel according to the present invention

도 3 은 본 발명에 따른 금속패널의 일부분을 확대하여 나타낸 사시도3 is an enlarged perspective view showing a part of a metal panel according to the present invention;

도 4 는 본 발명에 따른 금속패널의 일부분을 확대하여 나타낸 평면도4 is an enlarged plan view of a portion of a metal panel according to the present invention;

도 5 는 본 발명에 따른 연결코러게이션의 형상을 확대하여 나타낸 평면도5 is an enlarged plan view showing the shape of the connection corrugation according to the present invention;

도 6 은 본 발명에 따른 금속패널의 단면구조를 나타낸 단면도6 is a cross-sectional view showing a cross-sectional structure of a metal panel according to the present invention

도 7 은 본 발명에 따른 금속패널과 플라이드우드의 결합상태를 나타낸 예시도7 is an exemplary view showing a bonding state of the metal panel and the flywood according to the present invention

도 8 는 본 발명에 따른 금속패널의 응력해석결과를 나타낸 그림8 is a diagram showing the stress analysis results of the metal panel according to the present invention

도 9 는 종래의 일반적인 멤브레인 금속패널의 형상을 나타낸 사시도
9 is a perspective view showing the shape of a conventional general membrane metal panel

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

(A) : 패널(A): Panel

(10) : 단위코러게이션 (10): unit corrugation                 

(20) : 종방향 코러게이션(20): longitudinal corrugation

(30) : 횡방향 코러게이션(30): transverse corrugation

(40) : 종방향 연결코러게이션(40): longitudinal connecting corrugation

(50) : 횡방향 연결코러게이션(50): Lateral connection corrugation

(60)(60') : 연장코러게이션
(60) (60 '): Extended corrugation

본 발명은 LNG 저장탱크의 멤브레인 금속패널에 관한 것으로, 보다 상세하게는 액화천연가스(LNG)가 저장되는 탱크를 구성하는 금속패널로서 다수의 사각형 단위코러게이션이 단일 금속패널에 형성되며, 이 다수의 단위코러게이션이 종·횡방향 연결코러게이션에 의해 연결된 것으로 구성되어 금속패널의 응력집중 부위를 분산하고 집중도를 완화함으로써 안정성을 크게 할 수 있는 LNG 저장탱크의 멤브레인 금속패널에 관한 것이다.
The present invention relates to a membrane metal panel of an LNG storage tank, and more particularly, to a metal panel constituting a tank in which LNG is stored, a plurality of rectangular unit corrugations are formed in a single metal panel. This invention relates to a membrane metal panel of an LNG storage tank, which is composed of unit corrugations connected by longitudinal and lateral coupling corrugations, which can increase stability by dispersing stress concentration sites of metal panels and reducing concentration.

일반적으로 LNG는 대기압하에 비등점이 영하 162℃인 초저온 액체이며, 다중구조의 저장탱크에 저장하게 된다. 이러한 저장탱크는 영하 162℃의 극저온인 LNG를 안전하게 저장하기 위하여 멤브레인 금속패널로 이루어진 내부탱크의 주위를 단열층이 둘러싸는 구조로서 탱크 외부에서의 잠입열량에 의한 기화가스 발생이 최소 가 되도록 구성되어 있다.In general, LNG is a cryogenic liquid having a boiling point of minus 162 ° C. under atmospheric pressure, and is stored in a multi-structure storage tank. The storage tank is a structure in which a heat insulation layer surrounds an inner tank made of a membrane metal panel to safely store LNG having a low temperature of minus 162 ° C., and is configured to minimize the generation of vaporized gas due to the amount of infiltrating heat from the outside of the tank. .

한편, 상기 멤브레인 금속패널은 극저온 상태의 LNG와 직접적으로 접촉하게 되므로 열수축 변형에 대응할 수 있는 알루미늄 합금, 인버(Invar), 9% 니켈강 등 저온 취성이 적게 나타나는 재질의 금속이 사용되며, 반복적인 온도변화 및 저장액체의 하중변화에 따라 팽창 및 수축이 용이하도록 중앙부가 융기된 직선코러게이션이 형성되어 있다.On the other hand, since the membrane metal panel is in direct contact with the LNG in cryogenic conditions, a metal of low temperature brittleness is used, such as aluminum alloy, invar, and 9% nickel steel, which can cope with heat shrinkage deformation. The central corrugated straight corrugation is formed to facilitate expansion and contraction according to the change and the load change of the storage liquid.

종래의 일반적인 멤브레인 금속패널은 도 9에 도시된 바와 같이 열과 하중의 변화에 팽창 및 수축이 용이하도록 얇은 금속판으로서 다수의 종·횡방향 코러게이션을 포함하는 사각형으로 제작되며, LNG 저장탱크 내면은 상기의 금속패널 다수개로 구성되며, 단일 멤브레인 금속패널의 4변은 이웃하는 또 다른 단일 멤브레인 금속패널들의 변과 겹치기 용접에 의해 서로 연결되어 저장탱크의 기밀성을 유지하도록 되어 있다.Conventional membrane metal panel is made of a rectangular metal plate containing a plurality of longitudinal and transverse corrugations as a thin metal plate to facilitate expansion and contraction of heat and load changes as shown in Figure 9, the inner surface of the LNG storage tank It consists of a plurality of metal panels, four sides of a single membrane metal panel is connected to each other by overlap welding with another side of the neighboring single membrane metal panels to maintain the airtightness of the storage tank.

이러한 종래의 금속패널은 횡방향 코러게이션과 종방향 코러게이션이 직교하도록 형성되어 있으며, 단일 멤브레인 금속패널에는 다수의 교차부가 형성되도록 구성되어 있다. 이와 같은 교차부에는 횡방향 또는 종방향 코러게이션의 곡면보다 곡률반경이 상대적으로 작은 곡면이 형성되어 있으므로 응력집중현상이 발생하기 쉽고, 비교적 복잡한 형상을 가지므로 가공에 소요되는 시간과 공정이 증가하게 되어 비경제적이며, 이웃 패널과의 겹치기 용접시 용접선 상에 굴곡된 용접부가 많아 용접효율이 저하되는 문제점이 발생되었다.
Such a conventional metal panel is formed so that the transverse corrugation and the longitudinal corrugation are orthogonal, and a plurality of intersections are formed in a single membrane metal panel. Such a cross section is formed with a curved surface having a relatively small radius of curvature than that of a transverse or longitudinal corrugation, so that it is easy to cause stress concentration and has a relatively complicated shape, thereby increasing the time and process required for machining. It is uneconomical, and there is a problem in that welding efficiency decreases due to a large number of welds that are curved on the weld line when overlapping welding with a neighboring panel.

본 발명은 상기와 같은 종래의 문제점을 해결하기 위해 안출되는 것으로, 그 목적은 응력집중 부위를 분산하고 집중도를 완화함으로써 안정성을 증대하고, 금속패널과 금속패널의 겹침 용접부의 코러게이션 개수를 감소시켜 굴곡 용접 개소의 감소로 용접성을 향상시킬 수 있는 LNG 저장탱크의 멤브레인 금속패널을 제공함에 있다.
The present invention is devised to solve the above conventional problems, the object of which is to increase the stability by dispersing the stress concentration site and to reduce the concentration, and to reduce the number of corrugations of the overlap welding portion of the metal panel and the metal panel The present invention provides a membrane metal panel of an LNG storage tank capable of improving weldability due to a reduction in bending welding points.

상기한 바와 같은 목적을 달성하고 종래의 결점을 제거하기 위한 과제를 수행하는 본 발명은 패널로부터 볼록하게 융기된 가로변과 세로변이 조합되어 모서리가 완만한 사각띠형상의 다각형 구조로 이루어지는 융기부가 상호 일정간격을 이루도록 형성된 다수의 단위코러게이션과, 상기 다수의 단위코러게이션을 상호 연결하는 종·횡방향 연결코러게이션과, 상기 다수의 단위코러게이션 중 패널의 외단에 위치한 단위코러게이션의 가로변 또는 세로변으로부터 패널의 4변 끝단으로 각각 연장되는 연장코러게이션으로 구성된 것을 특징으로 한다.The present invention to achieve the object as described above and to perform the problem to eliminate the conventional defects is a mutually constant ridge is formed of a polygonal structure of a rectangular band with a smooth edge by combining the horizontal side and the vertical side convexly raised from the panel A plurality of unit corrugations formed to form an interval, longitudinal and horizontal connecting corrugations interconnecting the plurality of unit corrugations, and horizontal or vertical sides of unit corrugations located at the outer end of the panel among the plurality of unit corrugations; It is characterized by consisting of an extension corrugation extending from the end of each of the four sides of the panel.

또한, 상기 종·횡방향 연결코러게이션은 그 단면폭이 길이방향의 중심에서부터 단위코러게이션과 연결되는 연결부로 갈수록 점차적으로 넓어지도록 형성되고, 상기 연장코러게이션은 그 단면폭이 패널의 끝단에서부터 단위코러게이션과 연결되는 연결부로 갈수록 점차적으로 넓어지도록 형성된 것을 특징으로 한다.In addition, the longitudinal and horizontal connecting corrugation is formed so that the cross-sectional width gradually increases from the center in the longitudinal direction to the connecting portion connected to the unit corrugation, the extension corrugation is the unit corrugation of the cross-sectional width from the end of the panel It is characterized in that it is formed to gradually widen toward the connection portion connected to.

또한, 상기 단위코러게이션과 종·횡방향 연결코러게이션 및 연장코러게이션 은 그 단면이 반원 또는 타원형 또는 포물선형 중 선택된 하나의 형상으로 형성되며, 이 코러게이션과 패널의 평면부가 접하는 부위가 오목한 곡선형으로 형성된 것을 특징으로 한다.
In addition, the unit corrugation, longitudinal and lateral connecting corrugation and extension corrugation is formed in the shape of one of the cross-section, semi-circle, oval or parabolic, the concave and the area where the flat portion of the panel contact the concave curve Characterized in that the form.

이하, 본 발명의 실시예를 첨부도면과 연계하여 상세히 설명하면 다음과 같다.Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도 1 은 본 발명에 따른 금속패널의 형상을 나타낸 사시도를, 도 2 는 본 발명에 따른 금속패널의 형상을 나타낸 평면도를, 도 3 은 본 발명에 따른 금속패널의 일부분을 확대하여 나타낸 사시도를, 도 4 는 본 발명에 따른 금속패널의 일부분을 확대하여 나타낸 평면도를, 도 5 는 본 발명에 따른 연결코러게이션의 형상을 확대하여 나타낸 평면도를, 도 6 은 본 발명에 따른 금속패널의 단면구조를 나타낸 단면도를, 도 7 은 본 발명에 따른 금속패널과 플라이드우드의 결합상태를 나타낸 예시도를 도시한 것으로, 본 발명은 내외부에서 저응력 영역을 갖는 다수의 사각띠 형상의 단위코러게이션(10)과, 이 다수의 단위코러게이션(10)을 상호 연결하는 종·횡방향 코러게이션(20,30)으로 구성되어 있다.1 is a perspective view showing the shape of the metal panel according to the invention, Figure 2 is a plan view showing the shape of the metal panel according to the invention, Figure 3 is a perspective view showing an enlarged portion of the metal panel according to the invention, Figure 4 is a plan view showing an enlarged portion of the metal panel according to the present invention, Figure 5 is a plan view showing an enlarged shape of the connection corrugation according to the present invention, Figure 6 is a cross-sectional structure of the metal panel according to the present invention 7 is an exemplary view showing a bonding state of the metal panel and the plywood according to the present invention, the present invention is a plurality of rectangular band-shaped unit corrugation (10) having a low stress region in and out And longitudinal and horizontal corrugations 20 and 30 interconnecting the plurality of unit corrugations 10.

상기 단위코러게이션(10)은 패널(A)에 볼록하게 융기된 가로/세로변(11,12)이 조합되어 모서리가 완만한 사각띠 형상의 평면구조를 이루며, 다수의 단위코러게이션(10)이 상호 일정간격을 갖도록 형성되어 있다. 또한 단위코러게이션(10)의 가로/세로변(11,12)이 만나는 네 모서리는 둥근 곡선을 형성토록 함으로써 응력집중을 완화하고 성형가공이 용이하도록 구성되어 있다. The unit corrugation 10 is a combination of horizontal and vertical sides (11, 12) convexly raised on the panel (A) to form a planar structure of a rectangular band with a smooth edge, a plurality of unit corrugation (10) It is formed so that it may mutually have a fixed interval. In addition, the four corners where the transverse / vertical sides 11 and 12 of the unit corrugation 10 meet are configured to form a rounded curve to mitigate stress concentration and to facilitate molding.

상기와 같은 단위코러게이션(10)은 종·횡방향 코러게이션(20,30)이 교차되는 교차부에 위치하도록 형성되며, 내외부에서 저응력 영역을 형성하게 된다. 즉, 단위코러게이션(10)의 내부 영역은 4방향의 모든 방향으로 굴곡이 형성되어 폐곡선을 형성함으로써 최고응력의 1/5 이하의 낮은 수준의 응력분포가 가능해지고, 가로/세로변(11,12)에 의해 형성된 단위코러게이션(10)의 외부영역 역시 상기와 같은 이유로 낮은 응력 수준을 유지하게 된다.The unit corrugation 10 as described above is formed to be located at the intersection where the longitudinal and horizontal corrugations 20 and 30 intersect, and form a low stress region in and out. That is, the inner region of the unit corrugation 10 is bent in all directions in four directions to form a closed curve, thereby enabling a low level stress distribution of 1/5 or less of the maximum stress, and transverse / vertical edges 11, The outer region of the unit corrugation 10 formed by 12) also maintains a low stress level for the same reason.

상기 종·횡방향 코러게이션(20,30)은 단위코러게이션과 단위코러게이션을 연결하는 종·횡방향 연결코러게이션(40,50)과, 패널(A)에 형성된 다수의 단위코러게이션 중 패널의 외단, 즉 패널(A)의 4변 모서리에 인접한 위치에 형성된 단위코러게이션의 가로변(11) 또는 세로변(12)으로부터 패널(A)의 4변 끝단으로 각각 연장되는 연장코러게이션(60,60')으로 이루어져 있으며, 상기 종방향 연결코러게이션(40)과 연장코러게이션(60), 상기 횡방향 연결코러게이션(50)과 연장코러게이션(60')은 동일 직선상에 위치하도록 형성되어 있다.The longitudinal and lateral corrugations 20 and 30 may include longitudinal and lateral connecting corrugations 40 and 50 connecting unit corrugations and unit corrugations, and a panel of a plurality of unit corrugations formed in the panel A. The extension corrugation 60 extending from the horizontal edge 11 or the vertical edge 12 of the unit corrugation formed at a position adjacent to the edge of the four sides of the panel A to the ends of the four sides of the panel A, respectively. 60 '), the longitudinal connecting corrugation 40 and the extending corrugation 60, and the transverse connecting corrugation 50 and the extending corrugation 60' are formed on the same straight line. have.

한편, 종·횡방향 코러게이션(20,30)의 교차부에 저응력영역을 내/외부에 가지는 단위코러게이션(10)이 형성됨으로써, 연장코러게이션(60,60') 간의 사이 간격을 넓게 할 수 있고, 이로써 용접부에 형성되는 코러게이션, 즉 연장코러게이션(60,60')의 개수를 종래의 금속패널 용접부에 존재하는 코러게이션에 비해 대략 2개당 1개씩으로 줄일 수 있게 되어 자동 용접의 적용이 용이하게 된다.On the other hand, the unit corrugation 10 having a low stress region inside / outside is formed at the intersection of the longitudinal and lateral corrugations 20 and 30, thereby widening the interval between the extension corrugations 60 and 60 '. In this way, the number of corrugations formed in the weld, that is, the extension corrugations 60 and 60 'can be reduced to about one per two compared to the corrugations existing in the conventional metal panel weld. Application is easy.

한편, 상기 단위코러게이션(10)과 종·횡방향 연결코러게이션(40,50) 및 연 장코러게이션(60,60')의 단면은 반원 또는 타원형 또는 포물선형 중 선택된 하나의 형상으로 형성되며, 상기 코러게이션(10,40,50,60,60`)과 패널(A)의 평면부가 접하는 부위가 도 6과 같이 오목한 곡선형으로 형성되어 있다.On the other hand, the cross-section of the unit corrugation 10, longitudinal and lateral connecting corrugation (40, 50) and extension corrugation (60, 60 ') is formed in a shape selected from a semi-circle, oval or parabolic The portion where the corrugations 10, 40, 50, 60, 60 'and the planar portion of the panel A contact each other is formed in a concave curved shape as shown in FIG.

상기 종·횡방향 연결코러게이션(40,50)과 연장코러게이션(60,60')은 그 단면 폭이 단위코러게이션(10)과 연결되는 연결부(13)를 향해 점차 넓어지며 부드러운 곡선을 형성하도록 구성되어 응력집중완화 및 가공성을 향상시킬 수 있게 된다. 즉, 상기 종·횡방향 연결코러게이션(40,50)은 코러게이션의 길이방향 중심부로부터 양측의 연결부로 갈수록 도 5와 같이 단면폭이 점차적으로 넓어지며 부드러운 곡선을 형성하도록 구성되고, 상기 연장코러게이션(60,60')은 패널(A)의 끝단으로부터 연결부로 갈수록 단면폭이 점차적으로 넓어지도록 형성되어 있다.The longitudinal and lateral connecting corrugations 40 and 50 and the extending corrugations 60 and 60 'have their cross-sectional widths gradually widening toward the connecting portions 13 connected to the unit corrugations 10 and forming smooth curves. It is configured to be able to improve the stress concentration relaxation and workability. That is, the longitudinal and lateral connecting corrugations 40 and 50 are configured to gradually increase in cross-sectional width and form a smooth curve as shown in FIG. 5 from the longitudinal center of the corrugation toward both connecting portions, and the extension corrugation. 60, 60 'is formed so that the cross-sectional width may become gradually wider from the end of the panel A toward the connecting portion.

상기와 같이 구성된 금속패널은 LNG 탱크의 내면을 구성하기 위해 단열벽상에 설치되며 도 7과 같이 4변 모서리가 플라이우드(70)상의 격자형으로 고정 설치된 금속재질의 고정용 금속띠(71)에 위치하도록 배치되고, 이웃한 금속패널과 겹치기 용접에 의해 밀봉벽을 구성하게 되며, 이때 별도의 고정장치 없이 플라이우드(70)에 설치된 스트립(71)과 금속패널이 단속용접으로 융착되어 금속패널은 단열탱크에 고정된다.The metal panel configured as described above is installed on the insulation wall to constitute the inner surface of the LNG tank, and the four sides of the metal panel 71 is fixed to the metal strip 71 fixed in a lattice shape on the plywood 70 as shown in FIG. 7. It is disposed so as to position, and the sealing wall is formed by overlap welding with the neighboring metal panel, wherein the metal panel is fused by the intermittent welding the strip 71 and the metal panel installed in the plywood 70 without a separate fixing device It is fixed to the insulation tank.

도 8 은 본 발명에 따른 금속패널의 탄성응력해석 결과를 나타낸 그림이다. 본 응력해석은 MSC/NASTRAN 프로그램이 이용되었으며, SUS304L 스테인레스 소재로 이루어진 가로 3m × 세로 1m 크기의 금속패널을 상온에서 -162℃까지의 온도변화에 대응하는 각 위치별 상대적 응력크기 비교를 나타내고 있다. 응력해석결과 도 8에서 볼 수 있듯이 최대응력은 굴곡연결부에 나타나나 금속패널의 평면영역에는 상대적으로 낮은 응력이 분포함을 알 수 있다. 8 is a view showing the results of the elastic stress analysis of the metal panel according to the present invention. The MSC / NASTRAN program was used for this stress analysis. The 3m x 1m metal panel made of SUS304L stainless steel shows the comparison of the relative stress size at each location corresponding to the temperature change from -162 ℃ to room temperature. As shown in FIG. 8, the maximum stress is shown in the bent joint, but the relatively low stress is distributed in the planar region of the metal panel.

본 발명은 상술한 특정의 바람직한 실시예에 한정되지 아니하며, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형실시가 가능한 것은 물론이고, 그와 같은 변경은 청구범위 기재의 범위 내에 있게 된다.
The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

상술한 바와 같이 본 발명은 모서리가 완만한 사각형의 다수의 단위코러게이션이 패널에 일정간격으로 형성되고, 이 다수의 단위코러게이션이 종·횡방향 코러게이션의 교차부에 위치하도록 형성되어 종·횡방향 코러게이션과 연결되는 한편, 단위코러게이션과 종·횡방향 코러게이션의 연결부가 완만한 곡선을 형성토록 구성되어 응력집중을 완화하였으며 제작이 용이하도록 하였다. 따라서, 다수의 금속패널의 조합으로 이루어지는 저장탱크의 신뢰도를 높일 수 있고, 용접시 금속패널간의 겹침부위 코러게이션 감소로 인해 용접성을 향상시킬 수 있는 효과가 있다.



As described above, according to the present invention, a plurality of unit corrugations having a smooth corner are formed at regular intervals on the panel, and the plurality of unit corrugations are formed at the intersections of longitudinal and transverse corrugations. It is connected to the transverse corrugation, while the unit corrugation and the longitudinal and transverse corrugation connections are formed to form a gentle curve to alleviate the stress concentration and to facilitate the fabrication. Therefore, the reliability of the storage tank made of a combination of a plurality of metal panels can be increased, and weldability can be improved due to the reduction of the overlapped portion of the metal panels during welding.



Claims (3)

패널(A)로부터 볼록하게 융기된 가로변(11)과 세로변(12)이 조합되어 모서리가 완만한 사각띠형상의 다각형 구조로 이루어지는 융기부가 상호 일정간격을 이루도록 형성된 다수의 단위코러게이션(10)과,A plurality of unit corrugations 10 formed by lateral convex ridges 11 and 12 lateral convex ridges raised from the panel A are formed such that the ridges formed of a rectangular band-shaped polygonal structure having smooth edges are formed at regular intervals. and, 상기 다수의 단위코러게이션을 상호 연결하는 종·횡방향 연결코러게이션(40,50)과,Longitudinal and horizontal connecting corrugations 40 and 50 interconnecting the plurality of unit corrugations; 상기 다수의 단위코러게이션 중 패널의 외단에 위치한 단위코러게이션의 가로변 또는 세로변으로부터 패널의 4변 끝단으로 각각 연장되는 연장코러게이션(60,60')으로 구성된 것을 특징으로 하는 LNG 저장탱크의 멤브레인 금속패널.Membrane of the LNG storage tank, characterized in that consisting of an extended corrugation (60, 60 ') extending from the horizontal side or the vertical side of the unit corrugation of the plurality of unit corrugations to the end of the four sides of the panel, respectively. Metal panels. 제 1 항에 있어서,The method of claim 1, 상기 종·횡방향 연결코러게이션(40,50)은 그 단면폭이 길이방향의 중심에서부터 단위코러게이션과 연결되는 연결부로 갈수록 점차적으로 넓어지도록 형성되고, 상기 연장코러게이션(60,60')은 그 단면폭이 패널(A)의 끝단에서부터 단위코러게이션(10)과 연결되는 연결부로 갈수록 점차적으로 넓어지도록 형성된 것을 특징으로 하는 LNG 저장탱크의 멤브레인 금속패널.The longitudinal and horizontal connecting corrugations 40 and 50 are formed such that their cross-sectional widths gradually widen from the center in the longitudinal direction toward the connecting portions connected to the unit corrugations, and the extended corrugations 60 and 60 'are formed. Membrane metal panel of the LNG storage tank, characterized in that the cross-sectional width is formed to gradually widen from the end of the panel (A) toward the connection to the unit corrugation (10). 제 1 항 또는 제 2 항에 있어서,The method according to claim 1 or 2, 상기 단위코러게이션(10)과 종·횡방향 연결코러게이션(40,50) 및 연장 코러게이션(60,60')은 그 단면이 반원 또는 타원형 또는 포물선형 중 선택된 하나의 형상으로 형성되며, 이 코러게이션과 패널의 평면부가 접하는 부위가 오목한 곡선형으로 형성된 것을 특징으로 하는 LNG 저장탱크의 멤브레인 금속패널.The unit corrugation 10, the longitudinal and lateral connecting corrugation (40, 50) and the extended corrugation (60, 60 ') is formed in the shape of one of the cross-section, semi-circle, oval or parabolic. Membrane metal panel of the LNG storage tank, characterized in that the concave and the contact portion of the flat portion of the panel is formed in a concave curved shape.
KR1020040021526A 2004-03-30 2004-03-30 Membrane Metal Panel of Insulated LNG Tank KR100707675B1 (en)

Priority Applications (4)

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KR1020040021526A KR100707675B1 (en) 2004-03-30 2004-03-30 Membrane Metal Panel of Insulated LNG Tank
JP2007506068A JP4564051B2 (en) 2004-03-30 2004-11-23 LNG storage tank membrane metal panel
EP04808205A EP1732828B1 (en) 2004-03-30 2004-11-23 Metal membrane panel of insulated lng cargo tank
PCT/KR2004/003028 WO2005095234A1 (en) 2004-03-30 2004-11-23 Metal membrane panel of insulated lng cargo tank

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KR102201249B1 (en) * 2013-09-06 2021-01-11 대우조선해양 주식회사 Membrane panel of membrane type tank for cryogenic fluid storage
CN112145954B (en) * 2020-09-21 2022-04-26 浙江振申绝热科技股份有限公司 Tank bottom structure of metal inner tank of membrane type low-temperature storage tank

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JPS4111104Y1 (en) * 1965-08-02 1966-05-24
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EP1732828A1 (en) 2006-12-20
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JP4564051B2 (en) 2010-10-20
WO2005095234A1 (en) 2005-10-13
KR20050096357A (en) 2005-10-06
EP1732828A4 (en) 2008-03-26

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