The present invention relates to a membrane type insulation system for a liquefied gas fuel container and a cargo hold of a liquefied gas carrier. Invar steel (Invar, 36% of Ni) with a low thermal contraction amount is used as first and second membranes. A first insulation layer comprises a composite unit comprising plywood, an insulation material, and a composite material. The first insulation layer has 20% or less of the thickness in comparison with the thickness of a second insulation layer. The second insulation layer is formed in a sandwiched shape of polyurethane foam reinforced with glass fiber and the plywood, or the plywood and a composite material. According to the present invention, the membrane type insulation system can fix a spring constant by differently setting the spring constant in accordance with a deformation condition of the inner surface of a liquefied gas fuel container or an inner hull of a liquefied gas carrier in which the second insulation layer is installed. An element composing g a fixing method is applied with the fixing method on the second insulation layer. The second insulation layer comprises: a stud bolt welded onto the surface in which the second insulation layer is installed; a nut for fixing; a spring capable of controlling the spring constant in accordance with the deformation of the installed surface; a mold for compression fixing, which is to prevent the second insulation layer from being locally damaged when fixed; and a reference wedge for controlling the height in accordance with the deformation. According to the present invention, the weight of the membrane type insulation system can be reduced, and the membrane type insulation system can be slim. Also, the membrane type insulation system can improve structural rigidity and insulation performance. Moreover, a manufacturing process of the cargo hold is simplified, and production costs can be reduced.

    본 발명은 액화 가스 운반선의 화물창 및 액화 가스 연료 용기의 멤브레인형 단열시스템으로서, 열수축량이 작은 인바강(INVAR, 36%Ni)을 1차 및 2차 멤브레인으로 사용하고, 1차 단열층은 플라이우드(plywood), 단열재, 복합재 등으로 조합된 복합체로 구성되어, 2차 단열층 두께 대비 20% 이내의 두께를 가지고, 2차 단열층은 유리섬유로 강화된 폴리우레탄폼과 플라이우드 또는 플라우드 및 복합재료의 샌드위치된 형태로 구성된다. 본 발명은 2차 단열층이 설치되는 액화 가스 운반선의 내부 선각 또는 액화 가스 연료 용기의 내부 면의 변형 조건에 따라 탄성도(spring constant)를 다르게 설정하여 고정할 수 있으며, 고정 방식을 구성하는 요소는 2차 단열층이 설치되는 면에 용접된 스터드 볼트(stud bolt), 고정을 위한 너트(nut), 설치되는 면의 변형 정도에 따른 탄성도 조절 가능한 탄성체(spring), 고정 시 2차 단열층의 국부적 손상을 방지하기 위한 압축 고정용 몰드(mold), 변형 정도에 따라 높이 조절을 위한 기준판(reference wedge) 등으로 구성되는 2차 단열층에 대한 고정방식이 적용된다. 본 발명에 의하면, 경량화 및 슬림화 구현하고 단열성능 및 구조적 강성을 향상시킬 수 있음은 물론 화물창 제조공정이 단순화되어 생산원가를 절감할 수 있다.


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    Titel :

    Insulation System For Membrane Type in LNG Storage Tank


    Weitere Titelangaben:

    액화가스 화물창의 단열 시스템


    Beteiligte:
    PARK SEONG WOO (Autor:in) / KIM KWANG SEOK (Autor:in) / KIM JAE WOONG (Autor:in) / SHIN JUNG SUB (Autor:in) / KANG JOONG KYOO (Autor:in)

    Erscheinungsdatum :

    2017-05-11


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Koreanisch


    Klassifikation :

    IPC:    B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS / B65D Behältnisse zur Lagerung oder zum Transport von Gegenständen oder Materialien [Container], z.B. Säcke, Beutel, Fässer, Flaschen, Dosen, Kästen, Büchsen, Schachteln, Packkörbe, Tonnen, Gläser, Flüssigkeitsbehälter, Trichtersilos, Transportbehälter , CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS / F17C Behälter zum Aufnehmen oder Speichern verdichteter, verflüssigter oder verfestigter Gase , VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES



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