KR101031242B1 - Corrugation membrane reinforcement structure of lng cargo - Google Patents

Corrugation membrane reinforcement structure of lng cargo Download PDF

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Publication number
KR101031242B1
KR101031242B1 KR1020090009676A KR20090009676A KR101031242B1 KR 101031242 B1 KR101031242 B1 KR 101031242B1 KR 1020090009676 A KR1020090009676 A KR 1020090009676A KR 20090009676 A KR20090009676 A KR 20090009676A KR 101031242 B1 KR101031242 B1 KR 101031242B1
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South Korea
Prior art keywords
membrane
cargo hold
communication port
lng cargo
reinforcement
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KR1020090009676A
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Korean (ko)
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KR20100090416A (en
Inventor
윤종원
손희진
최재연
한상민
서용석
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삼성중공업 주식회사
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Priority to KR1020090009676A priority Critical patent/KR101031242B1/en
Application filed by 삼성중공업 주식회사 filed Critical 삼성중공업 주식회사
Priority to US12/920,446 priority patent/US20110186580A1/en
Priority to JP2010546708A priority patent/JP5519535B2/en
Priority to PCT/KR2009/001035 priority patent/WO2009110728A2/en
Priority to EP09718329.7A priority patent/EP2261110B1/en
Priority to CN200980108028.4A priority patent/CN101959752B/en
Publication of KR20100090416A publication Critical patent/KR20100090416A/en
Application granted granted Critical
Publication of KR101031242B1 publication Critical patent/KR101031242B1/en
Priority to JP2014076641A priority patent/JP5811477B2/en
Priority to US14/522,757 priority patent/US20150114970A1/en
Priority to US15/336,474 priority patent/US10132446B2/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
    • 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
    • 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
    • F17C2203/01—Reinforcing or suspension means
    • F17C2203/011—Reinforcing means
    • F17C2203/012—Reinforcing means on or in the wall, 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
    • F17C2203/03—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
    • F17C2203/0354—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
    • 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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0146—Two-phase
    • F17C2225/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2225/0161—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
    • 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

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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

본 발명은 액화천연가스 화물창의 멤브레인 보강구조에 관한 것으로서, 주름부의 변형을 방지하도록 주름부의 내측으로 설치되는 보강재와, 주름부의 기밀 검사 또는 수분 제거용으로 주입되는 가스의 유동성 확보가 이루어지도록 상기 보강재에 형성되는 연통구를 포함한다. 따라서 본 발명에 의하면 금속 멤브레인의 주름부 내측으로 보강재를 삽입 위치시킴으로써, 주름부의 변형을 방지할 수 있으며, 기밀 검사용 또는 수분 제거 목적으로 주입되는 가스의 유동성이 확보되어 보다 정확한 기밀 검사가 이루어질 수 있는 효과를 가진다.The present invention relates to a membrane reinforcing structure of a liquefied natural gas cargo hold, the reinforcement is installed to the inside of the wrinkles to prevent deformation of the wrinkles, and the reinforcement to ensure the fluidity of the gas injected for airtight inspection or water removal of the wrinkles It includes a communication port formed in. Therefore, according to the present invention, by inserting the reinforcing material into the inner portion of the pleated portion of the metal membrane, it is possible to prevent deformation of the pleated portion, the fluidity of the gas injected for the airtight inspection or water removal purpose is ensured, more accurate hermetic inspection can be made Has the effect.

액화천연가스 화물창, 멤브레인, 보강, 가스, 유동, 주름부, 변형 LNG Cargo, Membrane, Reinforcement, Gas, Flow, Crease, Deformation

Description

액화천연가스 화물창의 멤브레인 보강구조{CORRUGATION MEMBRANE REINFORCEMENT STRUCTURE OF LNG CARGO} Membrane reinforcement structure of LNG cargo hold {CORRUGATION MEMBRANE REINFORCEMENT STRUCTURE OF LNG CARGO}

본 발명은 액화천연가스 화물창의 멤브레인 보강구조에 관한 것으로, 더욱 상세하게는 금속 멤브레인의 주름부 내측으로 보강재를 위치시켜 주름부 형상의 붕괴를 방지함과 함께 내부로 주입되는 가스의 유동성을 확보할 수 있는 액화천연가스 화물창의 멤브레인 보강구조에 관한 것이다.The present invention relates to a membrane reinforcement structure of a LNG cargo hold, and more particularly, by placing the reinforcement inside the wrinkle portion of the metal membrane, The present invention relates to a membrane reinforcing structure of a liquefied natural gas cargo hold that can prevent collapse and secure fluidity of the gas injected therein.

일반적으로, 액화천연가스(LNG)는 메탄(methane)을 주성분으로 하는 천연가스를 -163℃로 냉각해 그 부피를 6백분의 1로 줄인 무색 투명한 초저온 액체를 말한다.In general, liquefied natural gas (LNG) refers to a colorless transparent cryogenic liquid whose natural gas containing methane as its main component is cooled to -163 ° C and its volume is reduced to one hundredth.

이러한 액화천연가스가 에너지자원으로 등장함에 따라 이 가스를 에너지로 이용하기 위해서 생산기지로부터 수요지의 인수지까지 대량으로 수송할 수 있는 효율적인 운송방안이 검토되어 왔으며, 이러한 노력의 일환으로 대량의 액화천연가스를 해상으로 수송할 수 있는 액화천연가스 운반선이 나타나게 되었다.As such liquefied natural gas has emerged as an energy resource, an efficient transportation method that can transport a large amount from the production base to the receiving site of the demand in order to use this gas as energy has been considered. LNG carriers have emerged to transport gas offshore.

그런데 이러한 액화천연가스 운반선에는 초저온상태로 액화시킨 액화천연가 스를 보관 및 저장할 수 있는 화물창(Cargo)이 구비되어 있어야 하는데, 이러한 화물창에 요구되는 조건이 매우 까다로워 많은 어려움이 있었다. 즉, 액화천연가스는 대기압 보다 높은 증기압을 가지며, 대략 -163℃ 정도의 비등온도를 갖기 때문에, 이러한 액화천연가스를 안전하게 보관하고 저장하기 위해서는 이를 저장하는 화물창은 초저온에 견딜 수 있는 재료, 예를 들면 알루미늄강, 스테인리스강, 36% 니켈강 등으로 제작되어야 하며, 기타 열응력 및 열수축에 강하고, 열침입을 막을 수 있는 독특한 인슐레이션 구조로 설계되어야 했다. However, the LNG carrier should be equipped with a cargo hold (Cargo) that can store and store the liquefied natural gas liquefied in the cryogenic state, there were a lot of difficulties due to the very demanding conditions. In other words, liquefied natural gas has a vapor pressure higher than atmospheric pressure, and has a boiling temperature of about -163 ℃, so to store and store the liquefied natural gas safely, the cargo hold for storing the liquefied natural gas, such as materials that can withstand ultra low temperatures, for example For example, it must be made of aluminum steel, stainless steel, 36% nickel steel, etc., and must be designed with a unique insulation structure that is resistant to other thermal stress and heat shrinkage and prevents heat intrusion.

특히, 화물창의 1차 방벽인 금속 멤브레인은 -163℃의 극저온 상태의 LNG와 직접적으로 접촉하게 되므로 응력변화에 대응할 수 있는 알루미늄 합금, 인바(Invar), 9% 니켈강 등 저온 취성에 강한 재질의 금속재질이 사용되며, 대략 직사각형으로 제작되고, 반복적인 온도변화 및 저장액체의 하중변화에 팽창 및 수축이 용이하도록 중앙부가 융기된 직선 주름부(코러게이션)가 금속패널 전체에 걸쳐 형성되어 있으며, 다수의 멤브레인 금속패널 모서리 및 4변이 이웃하는 또 다른 멤브레인의 모서리 및 4변에 의해 겹쳐진 후 겹치기 용접에 의해 서로 연결되어 탱크의 기밀성을 유지하도록 되어 있다.In particular, the metal membrane, which is the primary barrier of cargo holds, is in direct contact with LNG in cryogenic conditions at -163 ° C. Therefore, the metal membrane is resistant to low temperature brittleness such as aluminum alloy, Invar, 9% nickel steel, etc. A material is used, and it is made into a substantially rectangular shape, and a straight corrugation with a central portion is formed over the metal panel to facilitate expansion and contraction due to repeated temperature changes and load changes of the storage liquid. The membrane metal panel edges and the four sides of the membrane are overlapped by the neighboring edges and four sides of another neighboring membrane and then connected to each other by overlap welding to maintain the airtightness of the tank.

그러나 이와 같은 종래의 금속 멤브레인에서 주름부가 융기된 관계로 LNG선의 대형화 추세에 따른 화물창내 증가된 동압(dynamic pressure) 하에서 쉽게 붕괴되는 문제점이 예상되고 있다. 예컨대 액화가스에 의해 가해지는 유체 정역학적 압력이 주름부에 상당한 소성 변형을 일으킬 수 있으며 특히 교차하는 주름부로부터 소정의 거리에 있는 주름부의 측면이 압착될 수 있다. However, it is expected that the collapse of the conventional metal membrane is easily collapsed under increased dynamic pressure in the cargo hold due to the trend of larger LNG carriers. For example, the hydrostatic pressure exerted by the liquefied gas can cause significant plastic deformation in the corrugations, in particular the sides of the corrugations at a distance from the intersecting corrugations.

이에 따라 종래에는 주름부의 강성 보강을 위한 해결책으로 멤브레인의 두께를 증가시키거나, 주름부의 변형을 방지하도록 주름부의 내측으로 일정 형태의 보형물을 삽입하는 기술이 사용되고 있다.Accordingly, in the related art, a technique for increasing the thickness of the membrane as a solution for stiffening of the wrinkle portion or inserting a shape-shaped implant into the wrinkle portion to prevent deformation of the wrinkle portion is used.

그러나, 위와 같은 종래 기술에 따르면, 멤브레인의 두께를 증가시키는 경우 가요성(可撓性)이 저하되는 단점이 발생된다. 더욱이 멤브레인의 내부 공간은 여러 목적 즉, 기밀검사나 내부 수분 제거의 목적으로 가스가 주입되는데, 이때 종래의 보형물은 멤브레인의 변형을 방지하도록 최대한 멤브레인의 형상과 유사하도록 제작되어 삽입 위치되다 보니 가스 유동성의 확보가 쉽지 않았다.However, according to the prior art as described above, there is a disadvantage in that flexibility decreases when the thickness of the membrane is increased. In addition, the inner space of the membrane is injected with gas for various purposes, that is, for the purpose of airtightness inspection or internal moisture removal. In this case, the conventional prosthesis is manufactured and positioned to be as close as possible to the shape of the membrane to prevent deformation of the membrane. It was not easy to secure.

따라서 본 발명에서는 금속 멤브레인의 주름부 내측으로 주름부의 변형을 방지할 수 있으면서도 주입되는 가스의 유동성이 확보될 수 있는 구조의 보강재를 삽입 위치시킨 액화천연가스 화물창의 멤브레인 보강구조를 제공하는 것을 그 목적으로 한다.Accordingly, an object of the present invention is to provide a membrane reinforcing structure of a LNG cargo hold in which a reinforcing member having a structure capable of preventing the deformation of the corrugation portion while preventing the deformation of the corrugation portion is inserted into the metal membrane. It is done.

상기 목적을 달성하기 위하여 본 발명은, 액화천연가스 화물창을 구성하는 2차 방벽의 평면상에 설치되며 주름부를 형성하는 멤브레인 보강구조에 있어서, 주름부의 변형을 방지하도록 주름부의 내측으로 설치되는 보강재와, 주름부의 기밀 검사 또는 수분 제거용으로 주입되는 가스의 유동성 확보가 이루어지도록 상기 보강재에 형성되는 연통구를 포함하는 액화천연가스 화물창의 멤브레인 보강구조를 제공한다.In order to achieve the above object, the present invention, in the membrane reinforcing structure is installed on the plane of the secondary barrier constituting the LNG cargo hold and forming the pleat, the stiffener is installed inside the pleat to prevent deformation of the pleat; It provides a membrane reinforcement structure of the LNG cargo hold including a communication port formed in the reinforcing material to ensure the fluidity of the gas injected for airtight inspection or water removal of the wrinkles.

그리고 보강재는, 불연성 폼 또는 나무재로 이루어질 수 있으며, 양측 단면은 주름부의 단면 형상과 같을 수 있다.And the reinforcing material, may be made of a non-combustible foam or wood, both cross-sections may be the same as the cross-sectional shape of the folds.

또한, 연통구는, 반구형 또는 다각 형상으로 길이 방향을 따라 오목하게 파인 형태일 수 있다.In addition, the communication port may have a hemispherical or polygonal shape concave in the longitudinal direction.

또, 연통구는, 보강재의 상면에 제 1 연통구가 형성되고, 하면에는 제 2 연통구가 같이 형성될 수 있다.In addition, the communication port, the first communication port is formed on the upper surface of the reinforcing material, the second communication hole may be formed together on the lower surface.

이상 설명한 바와 같이 본 발명의 액화천연가스 화물창의 금속 멤브레인에 따르면, 금속 멤브레인의 주름부 내측으로 보강재를 삽입 위치시킴으로써, 주름부의 변형을 방지할 수 있으며, 기밀 검사용 또는 수분 제거 목적으로 주입되는 가스의 유동성이 확보되어 보다 정확한 기밀 검사가 이루어질 수 있는 효과를 가진다.As described above, according to the metal membrane of the liquefied natural gas cargo hold of the present invention, by inserting the reinforcing material inside the pleats of the metal membrane, deformation of the pleats can be prevented, and the gas injected for the purpose of airtightness inspection or water removal. The fluidity of the is ensured has the effect that a more accurate airtight inspection can be made.

이하 첨부된 도면을 참조하여 본 발명의 동작 원리를 상세히 설명한다. 하기에서 본 발명을 설명함에 있어서 공지 기능 또는 구성에 대한 구체적인 설명이 본 발명의 요지를 불필요하게 흐릴 수 있다고 판단되는 경우에는 그 상세한 설명을 생략할 것이다. 그리고 후술되는 용어들은 본 발명에서의 기능을 고려하여 정의된 용어들로서 이는 사용자, 운용자의 의도 또는 관례 등에 따라 달라질 수 있다. 그러므로 그 정의는 본 명세서 전반에 걸친 내용을 토대로 내려져야 할 것이다. Hereinafter, the operating principle of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, when it is determined that a detailed description of a known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. The following terms are defined in consideration of the functions of the present invention, and may be changed according to the intentions or customs of the user, the operator, and the like. Therefore, the definition should be based on the contents throughout this specification.

도 1은 본 발명의 일실시예에 따른 금속 멤브레인과 보강재의 사시도이고, 도 2는 본 발명의 일실시예에 따른 금속 멤브레인과 보강재의 단면도이다.1 is a perspective view of a metal membrane and a reinforcing material according to an embodiment of the present invention, Figure 2 is a cross-sectional view of the metal membrane and a reinforcing material according to an embodiment of the present invention.

액화천연가스 화물창에서 1차 방벽을 구성하는 금속 멤브레인(100)은 도 1에 도시된 것과 같이, -163℃의 극저온 상태의 액화천연가스와 직접적으로 접촉하게 되므로 응력 변화에 대응할 수 있는 알루미늄 합금, 인바(Invar), 9% 니켈강 등 저온 취성에 강한 재질의 금속재질이 사용되며, 직사각형태에서 반복적인 온도변화 및 저장액체의 하중변화에 팽창 및 수축이 용이하도록 중앙부가 융기된 주름부(102)가 금속패널 전체에 걸쳐 형성되어 있을 수 있다. As shown in FIG. 1, the metal membrane 100 constituting the primary barrier in the LNG cargo hold is in direct contact with the LNG in a cryogenic state of −163 ° C., thus being capable of responding to a change in stress. A metal material made of a material resistant to low temperature brittleness, such as Invar and 9% nickel steel, is used, and a wrinkled part 102 having a central portion to facilitate expansion and contraction in response to repeated temperature changes and load changes of the storage liquid in a rectangular shape 102 It may be formed over the entire metal panel.

주름부(102)는 가로 방향의 제 1 주름부(102a)와 세로 방향의 제 2 주름부(102b)로 이루어지고, 이들 제 1 주름부(102a)와 제 2 주름부(102b)가 교차하는 부분에 교차부(102c)가 형성되어 화물창의 내부면을 향하여 돌출된다.The wrinkle part 102 consists of the 1st wrinkle part 102a of a horizontal direction, and the 2nd wrinkle part 102b of a vertical direction, and these 1st wrinkle part 102a and the 2nd wrinkle part 102b cross | intersect. An intersection 102c is formed in the portion and projects toward the inner surface of the cargo hold.

여기서 주름부(102)의 강성 보강을 위하여 제 1 주름부(102a)와 제 2 주름부(102b)의 내부를 걸쳐 교차부(102c)에 이르도록 일정 형태를 가지는 보강재(110)를 삽입 위치시키게 된다.In this case, the reinforcing member 110 having a certain shape is inserted to be positioned to reach the intersection portion 102c over the inside of the first and second wrinkles 102a and 102b for rigid reinforcement of the wrinkles 102. do.

보강재(110)는 페놀폼 등의 불연성 폼 또는 나무재가 사용될 수 있으며, 양측 단면 형상은 제 1 주름부(102a)와 제 2 주름부(102b)의 양내측의 단면 형상과 같은 곡면 형상으로 이루어져서 밀착 설치될 수 있다. 그리고 이 보강재(110)상에 연통구(112)가 형성될 수 있다.The reinforcement 110 may be a non-combustible foam or wood such as phenol foam, and the cross-sectional shape on both sides is made of a curved shape such as the cross-sectional shape on both inner sides of the first corrugation part 102a and the second corrugation part 102b. Can be installed. And the communication port 112 may be formed on the reinforcement 110.

연통구(112)는 상면 또는 하면 중 어느 한 곳에 형성될 수도 있으며, 상면과 하면에 각각 제 1 연통구(112a)와 제 2 연통구(112b)가 형성될 수 있다.The communication port 112 may be formed on any one of the upper and lower surfaces, and the first and second communication ports 112a and 112b may be formed on the upper and lower surfaces, respectively.

도 1 내지 도 2에서는 제 1 연통구(112a)와 제 2 연통구(112b)가 같이 형성된 것을 도시하였다.1 to 2 illustrate that the first communication port 112a and the second communication port 112b are formed together.

이러한 제 1 연통구(112a)와 제 2 연통구(112b)는 멤브레인(100)의 기밀 검사 또는 수분 제거용으로 주입되는 가스의 유동성 확보를 위하여 반구형 또는 다각 형상으로 길이 방향을 따라 오목하게 파인 형태로 형성될 수 있다.The first communication hole 112a and the second communication hole 112b are recessed in the shape of a hemispherical shape or a polygonal shape concave along the length direction in order to ensure the fluidity of the gas injected for airtight inspection of the membrane 100 or water removal. It can be formed as.

이와 같은 구조로 이루어진 액화천연가스 화물창의 금속 멤브레인의 구조에 따른 작용을 설명하면 다음과 같이 이루어진다.Referring to the action according to the structure of the metal membrane of the LNG cargo hold composed of such a structure is made as follows.

도 2를 참고하여 설명하면, 기존과 같이 보강재(110)가 삽입 위치되지 않은 주름부에서는 액화가스에 의해 가해지는 유체 정역학적 압력이 주름부에 상당한 소성 변형을 일으킬 수 있다. 따라서 본 발명에서는 제 1 주름부(102a)와 제 2 주름부(102b)의 내부를 걸쳐 교차부(102c)에 까지 페놀폼 등의 불연성 폼 또는 나무재로 이루어진 보강재(110)를 삽입 위치시키게 된다.Referring to FIG. 2, the hydrostatic pressure exerted by the liquefied gas may cause a significant plastic deformation in the wrinkled portion where the reinforcement 110 is not inserted as in the related art. Therefore, in the present invention, the reinforcing member 110 made of a non-combustible foam such as phenolic foam or wood is inserted into the intersection portion 102c through the interior of the first wrinkle portion 102a and the second wrinkle portion 102b. .

보강재(110)의 삽입은, 제 1 주름부(102a)와 제 2 주름부(102b)의 내측면에 억지끼워 고정시키거나, 도시되지는 않았지만 보강재(110)를 양면테이프로 감싼 뒤에 제 1 주름부(102a)와 제 2 주름부(102b)의 내측면에 부착하여 위치시킬 수 있다. 또한, 경우에 따라서는 멤브레인(100)이 뒤집혀진 상태에서 보강재(110)를 위치시킨 후 설치를 위하여 바로 위치하였을 때에 보강재(110)의 이탈을 방지하도록 임시적으로 고무밴드 등을 이용하여 위치시킬 수 있다.The reinforcement 110 is inserted into the first pleats 102a and the second pleats 102b by being clamped or fixed to the inner surfaces of the first pleats 102a and the second pleats 102b, but not shown in the drawing. It may be attached to and positioned on the inner surfaces of the portion 102a and the second pleats 102b. In some cases, when the membrane 100 is inverted, the reinforcement 110 may be positioned and then temporarily placed using a rubber band to prevent the reinforcement 110 from being separated when the reinforcement 110 is immediately positioned for installation. have.

이렇게 제 1 주름부(102a)와 제 2 주름부(102b)의 내측면에 삽입 위치된 보강재(110)는 열팽창계수가 제 1 주름부(102a)와 제 2 주름부(102b) 보다 크므로 보 강재(110)와 제 1 주름부(102a)와 제 2 주름부(102b)의 사이에 갭이 형성되고, 이 갭을 통하여 수축, 팽창되는 제 1 주름부(102a)와 제 2 주름부(102b)에는 영향을 미치지 않게 된다. 즉, 제 1 주름부(102a)와 제 2 주름부(102b)가 본연의 기능을 충분히 수행하면서도 보강재(110)를 통하여 충격에 강성이 보강되고 단열 효율도 증가될 수 있다.The reinforcement 110 inserted into the inner side surfaces of the first and second wrinkles 102a and 102b has a thermal expansion coefficient greater than that of the first and second wrinkles 102a and 102b. A gap is formed between the steel material 110, the first wrinkle portion 102a, and the second wrinkle portion 102b, and the first wrinkle portion 102a and the second wrinkle portion 102b contracted and expanded through the gap. ) Will not be affected. That is, while the first wrinkle portion 102a and the second wrinkle portion 102b sufficiently perform their inherent functions, the stiffness may be reinforced through the reinforcing member 110 and the thermal insulation efficiency may be increased.

더욱이 보강재(110)에 형성된 제 1 연통구(112a)와 제 2 연통구(112b)는, 멤브레인(100)의 기밀 검사 또는 수분 제거를 위하여 주입되는 가스가 원활히 유동되도록 유로를 형성함으로써, 기밀 검사의 신뢰성을 높일 수 있으며, 수분 제거가 용이하게 이루어질 수 있다. 또한, 제 1 연통구(112a)와 제 2 연통구(112b)는 보강재(110)의 구조적인 강성에 영향을 미치지 않으면서도 보강재(110)의 전체적인 중량을 줄일 수 있다. Furthermore, the first communication port 112a and the second communication port 112b formed in the reinforcing member 110 form a flow path so that the gas injected for the airtight inspection or removal of moisture of the membrane 100 smoothly flows, thereby ensuring the airtight inspection. It can increase the reliability and can be easily removed moisture. In addition, the first communication port 112a and the second communication port 112b may reduce the overall weight of the reinforcement 110 without affecting the structural rigidity of the reinforcement 110.

그러므로 금속 멤브레인의 주름부에 보강재를 삽입 위치시킴으로써, 주름부의 변형을 방지할 수 있으며, 기밀 검사용 또는 수분 제거용으로 주입되는 가스의 유동성이 확보되어 보다 정확한 기밀 검사가 이루어질 수 있고 수분 제거로 단열 효율이 증가될 수 있다.Therefore, by inserting the reinforcing material into the wrinkle part of the metal membrane, it is possible to prevent the deformation of the wrinkle part, to ensure the fluidity of the gas injected for airtight inspection or moisture removal, more accurate airtight inspection can be made and the insulation by moisture removal Efficiency can be increased.

이상에서 설명한 것은 본 발명에 따른 액화천연가스 화물창의 멤브레인 보강구조에 대하여 하나의 실시예에 불과한 것으로서, 본 발명은 상기한 실시예에 한정되지 않고, 이하의 특허청구범위에서 청구하는 바와 같이 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변경 실시가 가능한 범위까지 본 발명의 기술적 정신이 있다고 할 것이다.What has been described above is just one embodiment of the membrane reinforcing structure of the LNG cargo hold according to the present invention, the present invention is not limited to the above embodiment, the invention as claimed in the following claims Without departing from the gist of the present invention, those skilled in the art to which the present invention pertains to the technical spirit of the present invention to the extent that various modifications can be made.

도 1은 본 발명의 일실시예에 따른 금속 멤브레인과 보강재의 사시도이고,1 is a perspective view of a metal membrane and a reinforcing material according to an embodiment of the present invention,

도 2는 본 발명의 일실시예에 따른 금속 멤브레인과 보강재의 단면도이다.2 is a cross-sectional view of the metal membrane and the reinforcing material according to an embodiment of the present invention.

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

100 : 멤브레인 102 : 주름부100: membrane 102: wrinkles

102a : 제 1 주름부 102b : 제 2 주름부102a: first wrinkled portion 102b: second wrinkled portion

102c : 교차부 110 : 보강재102c: intersection 110: reinforcement

112 : 연통구 112 a: 제 1 연통구112: communication port 112 a: first communication port

112b : 제 2 연통구112b: second communication port

Claims (5)

액화천연가스 화물창을 구성하는 2차 방벽의 평면상에 설치되며 주름부를 형성하는 멤브레인 보강구조에 있어서,In the membrane reinforcing structure is installed on the plane of the secondary barrier constituting the LNG cargo hold, and forming a wrinkle portion, 상기 주름부의 변형을 방지하도록 상기 주름부의 내측으로 설치되는 보강재와,A reinforcing member installed inward of the wrinkle part to prevent deformation of the wrinkle part; 상기 주름부의 기밀 검사 또는 수분 제거용으로 주입되는 가스의 유동성 확보가 이루어지도록 상기 보강재에 형성되는 연통구Communication port formed in the reinforcing material to ensure the fluidity of the gas injected for airtight inspection or water removal of the wrinkle portion 를 포함하는 액화천연가스 화물창의 멤브레인 보강구조.Membrane reinforcement structure of the LNG cargo hold comprising a. 제 1 항에 있어서,The method of claim 1, 상기 보강재는,The reinforcing material, 불연성 폼 또는 나무재인 액화천연가스 화물창의 멤브레인 보강구조.Membrane reinforcement structure of LNG cargo hold of incombustible foam or wood. 제 1 항에 있어서,The method of claim 1, 상기 보강재의 양측 단면은 상기 주름부의 단면 형상과 같은 액화천연가스 화물창의 멤브레인 보강구조.Membrane reinforcement structure of the LNG cargo hold is the same as the cross-sectional shape of both sides of the reinforcing member. 제 1 항에 있어서,The method of claim 1, 상기 연통구는, 반구형 또는 다각 형상으로 길이 방향을 따라 오목하게 파인 형태인 액화천연가스 화물창의 멤브레인 보강구조.The communication port is a membrane reinforcing structure of the LNG cargo hold in the form of a hemispherical or polygonal shape concave along the longitudinal direction. 제 1 항 또는 제 4 항에 있어서,The method according to claim 1 or 4, 상기 연통구는, The communication port, 상기 보강재의 상면에 제 1 연통구가 형성되고, 하면에는 제 2 연통구가 같이 형성되는 액화천연가스 화물창의 멤브레인 보강구조.The first communication port is formed on the upper surface of the reinforcing material, the membrane reinforcing structure of the LNG cargo hold is formed with the second communication port together.
KR1020090009676A 2008-03-03 2009-02-06 Corrugation membrane reinforcement structure of lng cargo KR101031242B1 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
KR1020090009676A KR101031242B1 (en) 2009-02-06 2009-02-06 Corrugation membrane reinforcement structure of lng cargo
JP2010546708A JP5519535B2 (en) 2008-03-03 2009-03-03 Reinforcement material for corrugated membrane of liquefied natural gas cargo tank and membrane assembly having the same
PCT/KR2009/001035 WO2009110728A2 (en) 2008-03-03 2009-03-03 Reinforcement member for membrane of liquefied natural gas cargo, membrane assembly having same, and construction method for same
EP09718329.7A EP2261110B1 (en) 2008-03-03 2009-03-03 Reinforcement member for membrane of liquefied natural gas cargo, membrane assembly having same, and construction method for same
US12/920,446 US20110186580A1 (en) 2008-03-03 2009-03-03 Reinforcing member for corrugated membrane of lng cargo tank, membrane assembly having the reinforcing member and method for constructing the same
CN200980108028.4A CN101959752B (en) 2008-03-03 2009-03-03 Reinforcement member for membrane of liquefied natural gas cargo, membrane assembly having same, and construction method for same
JP2014076641A JP5811477B2 (en) 2008-03-03 2014-04-03 Reinforcement material for corrugated membrane of liquefied natural gas cargo tank, membrane assembly having the same, and construction method thereof
US14/522,757 US20150114970A1 (en) 2008-03-03 2014-10-24 Reinforcing member for corrugated membrane of lng cargo tank, membrane assembly having the reinforcing member and method for contructing the same
US15/336,474 US10132446B2 (en) 2008-03-03 2016-10-27 Reinforcing member for corrugated membrane of LNG cargo tank, membrane assembly having the reinforcing member and method for constructing the same

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KR101571426B1 (en) 2014-02-21 2015-11-24 삼성중공업 주식회사 Reinforcement unit used for membrane

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KR101349873B1 (en) * 2011-12-05 2014-01-09 삼성중공업 주식회사 Combination structure of reinforcing member for primary barrier of lng storage tank
KR101337633B1 (en) * 2011-12-13 2013-12-05 주식회사 티엠씨 Fixing structure of reinforcing member for primary barrier of lng storage tank
KR101349875B1 (en) * 2011-12-16 2014-01-16 주식회사 티엠씨 Fixing structure of reinforcing member for primary barrier of lng storage tank
KR101375262B1 (en) * 2011-12-16 2014-03-17 삼성중공업 주식회사 Fixing structure for the primary barrier reinforcement member of lng storage tank
KR101588661B1 (en) * 2013-10-18 2016-01-27 삼성중공업 주식회사 Cargo and reinforcing member used in the same
KR101540328B1 (en) * 2013-12-20 2015-07-30 삼성중공업 주식회사 Reinforcement member used for membrane
KR101625877B1 (en) * 2014-07-16 2016-06-01 삼성중공업 주식회사 Cargo for liquefied gas and manufacturing method thereof
FR3084346B1 (en) * 2018-07-27 2020-12-25 Gaztransport Et Technigaz WATERPROOF WALL WITH REINFORCED CORRUGATED MEMBRANE

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KR101571426B1 (en) 2014-02-21 2015-11-24 삼성중공업 주식회사 Reinforcement unit used for membrane

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