KR20130066961A - Independent self supporting tank system of lng carrrier - Google Patents

Independent self supporting tank system of lng carrrier Download PDF

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Publication number
KR20130066961A
KR20130066961A KR1020110133753A KR20110133753A KR20130066961A KR 20130066961 A KR20130066961 A KR 20130066961A KR 1020110133753 A KR1020110133753 A KR 1020110133753A KR 20110133753 A KR20110133753 A KR 20110133753A KR 20130066961 A KR20130066961 A KR 20130066961A
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South Korea
Prior art keywords
lng
tube
tank
air
hull
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KR1020110133753A
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Korean (ko)
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KR101414787B1 (en
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김을년
하심식
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현대중공업 주식회사
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Priority to KR1020110133753A priority Critical patent/KR101414787B1/en
Priority to CN2012206844289U priority patent/CN203345163U/en
Priority to JP2012271484A priority patent/JP5572206B2/en
Publication of KR20130066961A publication Critical patent/KR20130066961A/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
    • B63B25/24—Means for preventing unwanted cargo movement, e.g. dunnage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B17/00—Vessels parts, details, or accessories, not otherwise provided for
    • 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
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B3/00—Hulls characterised by their structure or component parts
    • B63B3/14—Hull parts
    • B63B3/70—Reinforcements for carrying localised loads, e.g. propulsion plant, guns
    • 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
    • B65D90/12—Supports
    • 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
    • F17C13/004—Details of vessels or of the filling or discharging of vessels for large storage vessels not under pressure
    • 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
    • F17C13/04—Arrangement or mounting of valves
    • 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
    • F17C13/08—Mounting arrangements for vessels
    • 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
    • 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
    • B63B2025/087—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid comprising self-contained tanks installed in the ship structure as separate units
    • 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
    • B63B25/28—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for deck loads
    • B63B2025/285—Means for securing deck containers against unwanted movements

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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)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

PURPOSE: An independent tank supporting structure system of an LNG(Liquefied Natural Gas) carrying vessel is provided to prevent the deformation of a joined portion of a tank and a hull caused by the loads of the LNG and the tank. CONSTITUTION: An independent tank supporting structure system of an LNG carrying vessel comprises a tube, two compressors(30), two pipes(31), two controlling valves(32), a pressure meter(35), a sense unit(36), and a depressurization valve(37). The tube is inserted inside a space unit of a hull(20) and an LNG tank(10), thereby uniformly distributing and supporting the LNG tank. The compressors supplies air inside to the tube. The air flows into the tube through the pipes. The controlling valves control the amount of the air flowing inside the tube. The pressure meter displays the amount of the air by measuring the same when the amount of the air inflow is excessive. The sense unit senses the excessive amount of the air inflow using the pressure meter. The depressurization valve receives signals of the sense unit and discharges the excessive amount of the air inflow to the outside of the tube.

Description

ＬＮＧ 운반선의 독립형 탱크 지지구조 시스템{Independent Self Supporting Tank System of LNG Carrrier}{Independent Self Supporting Tank System of LNG Carrrier}

본 발명은 LNG 운반선의 독립형 탱크 지지구조 시스템에 관한 것으로, 해상으로 LNG를 운송하기 위하여 극저온 상태의 LNG를 저장한 탱크가 운반선 내에서 설치됨에 있어서 LNG 무게 및 탱크 자중, 선체 운동에 기인한 하중 등에 의하여 탱크와 운반선의 선채에 아무런 변형이 발생하지 않도록 하기 위한 LNG 운반선의 독립형 탱크 지지구조 시스템에 관한 것이다.
The present invention relates to a stand-alone tank supporting structure system for an LNG carrier, wherein a tank storing LNG at a cryogenic temperature is installed in a carrier for transporting the LNG to the sea, the LNG weight, the weight of the tank, To a stand-alone tank support structure system of an LNG carrier to prevent any deformation of the tank and the tanker vessel.

종래에는 일반적으로, LNG 운반선에 설치된 독립형 LNG 탱크가 도 1에 도시된 모스(Moss)형 LNG 탱크(100) 타입과 도 2에 도시된 SPB형 LNG 탱크(200)타입 등으로 이루어진다.Conventionally, a stand-alone type LNG tank installed in an LNG carrier includes a Moss type LNG tank 100 shown in FIG. 1 and an SPB type LNG tank 200 type shown in FIG.

극저온의 LNG를 저장하기 위하여 LNG 탱크는 주로 알미늄으로 제작하고 그 외벽에 보온재(Insulation)를 설치하여 열손실을 방지하게 된다.In order to store cryogenic LNG, the LNG tank is mainly made of aluminum and the insulation is installed on the outer wall to prevent heat loss.

상기 모스형 LNG 탱크(100)가 운반선의 선체(400)에 설치됨에 있어서 스커트(450)의 지지에 의해 설치됨을 알 수 있다.It can be seen that the morse type LNG tank 100 is installed by supporting the skirt 450 when it is installed on the hull 400 of the carrier.

따라서 탱크에 LNG를 채우게 되면 탱크의 자중과 LNG 무게가 모두 스커트(450)를 통하여 선체(400)에 전달되고 이때 탱크의 적도부(300)와 선체(400)의 스커트(450) 설치부 등의 구조 불연속부에 국부적으로 큰 하중이 걸리고 구조 파손확률이 크게 증가하게 된다.Therefore, when the tank is filled with LNG, the weight of the tank and the weight of the LNG are both transmitted to the hull 400 through the skirt 450, and the equatorial portion 300 of the tank and the skirt 450 of the hull 400 A large local load is applied to the structure discontinuity and the probability of structural failure is greatly increased.

즉 모든 하중이 스커트(450)를 통하여 전달되기 때문에 탱크의 적도부(300)는 하중에 의하여 탱크가 높이방향으로 늘어나게 되면서 폭방향으로는 수축이 일어나 좌굴이 발생함과 더불어 높은 응력 증가를 유발하게 된다.That is, since all the loads are transmitted through the skirt 450, the equator portion 300 of the tank is contracted in the width direction while the tank is extended in the height direction due to the load, buckling occurs and high stress increase is caused do.

또한 과도한 하중에 견디기 위하여 스커트(450)뿐 아니라 선체(400)에도 구조적 보강이 필요하고 과도한 하중에 기인하여 LNG 적재량을 더 늘릴 수 있는 탱크를 제조하기 어려운 점이 있다.Further, in order to withstand excessive load, it is difficult to fabricate a tank which can be structurally reinforced not only in the skirt 450 but also in the hull 400, and which can further increase the LNG load due to the excessive load.

상기의 문제점들은 모스형 LNG 탱크(100) 타입뿐 아니라 SPB형 LNG 탱크(200) 타입에서도 발생하게 된다.
The above problems occur not only in the MOS type LNG tank 100 but also in the SPB type LNG tank 200 type.

전술된 문제점을 해소하고자 본 발명에 따른 LNG 운반선의 독립형 탱크 지지구조 시스템은, LNG를 저장한 탱크와 상기 탱크가 설치된 운반선의 선체 결합 부위에 LNG 무게 및 탱크 자중, 선체 운동에 기인한 하중 등으로 인한 변형을 방지하고자 하는데 그 목적이 있다.In order to solve the above-mentioned problem, the independent tank supporting structural system of the LNG carrier according to the present invention is characterized in that the LNG carrier supporting structure system is constructed by liquefying the LNG tank with the LNG weight, the tank weight, The purpose of the present invention is to prevent deformation caused by the above.

또한 탱크와 운반선의 선체 결합 부위 변형을 방지함으로써 목적지에 LNG를 안전하게 공급하고자 하는데에 그 목적이 있다.It is also intended to provide a safe supply of LNG to a destination by preventing the deformation of the hull connecting region of the tank and the carrier.

또한 탱크와 운반선의 선체 결합 부위 변형을 방지함으로써 종래 LNG 적재량보다 더 많은 LNG 적재량을 보유하기 위한 탱크를 제조하고자 하는데에 그 목적이 있다.
It is also an object of the present invention to provide a tank for retaining the LNG load more than the conventional LNG load by preventing deformation of the hull connecting portion of the tank and the carrier.

전술된 목적을 달성함에 있어 본 발명에 따른 LNG 운반선의 독립형 탱크 지지구조 시스템은, LNG를 적재하게 되는 MOSS형 및 SPB형 LNG 탱크와 운반선의 선체 결합부위에 변형 방지를 위하여 LNG 탱크와 선체의 공간부에 삽설되어 LNG 탱크를 등분포 지지하는 튜브와, 선체의 양측 저부 내부에 삽설되어 상기 튜브 내부로 공기를 공급하게 되는 양 압축기와, 상기 양 압축기와 튜브에 각각 연결되어 공기를 튜브로 유입하는 양 파이프와, 상기 양 파이프의 어느 지점에 각각 설치되어 튜브 내부로 유입되는 공기의 유입량을 조절하게 되는 양 조절밸브와, 상기 튜브 내부로 유입되는 공기의 유입량이 초과될 경우 공기의 초과 유입량을 측정하여 제시하는 압력계와, 상기 압력계를 통하여 공기의 초과 유입량을 감지하는 센스부와, 상기 센스부의 신호를 받고 공기의 초과 유입량을 튜브 외부로 유출하는 감압밸브를 포함하여 구성되는 것을 특징으로 한다.
The independent tank support structure system of the LNG carrier according to the present invention in achieving the above object, the space of the LNG tank and the hull to prevent deformation in the hull coupling portion of the MOSS-type and SPB-type LNG tank and the carrier to load LNG A tube inserted into the unit for uniformly supporting the LNG tank, both compressors inserted into both bottoms of the hull and supplying air into the tube, and connected to the both compressors and the tubes to introduce air into the tube. Both pipes, both control valves respectively installed at some points of the pipes to control the inflow of air flowing into the tube, and the excess inflow of air when the inflow of the air flowing into the tube is exceeded is measured. A pressure gauge, a sense unit for detecting excess flow of air through the pressure gauge, and the air receiving the signal of the sense unit. That comprises a pressure reducing valve to spill the excess flow rate to the outside tube is characterized.

상기 튜브는, 외부 튜브와 내부 튜브로 이루어진 2중 튜브 또는 하나의 튜브를 택일하도록 한 것을 특징으로 한다.The tube is characterized in that the choice of a double tube or one tube consisting of an outer tube and an inner tube.

상기 2중 튜브 이용시, 양 압축기에 각각 연결된 파이프를 서로 연결하기 위한 이음관이 더 구비되고, 상기 이음관의 정중앙에는 양 압축기의 연동으로 2중 튜브 내의 공기압이 동일하도록 통제밸브가 더 구비되는 것을 특징으로 한다.
When the double tube is used, a joint pipe is further provided for connecting pipes connected to both compressors to each other, and a control valve is further provided at the center of the joint pipe so that the air pressure in the double tube is the same by interlocking both compressors. It features.

본 발명에 따른 LNG 운반선의 독립형 탱크 지지구조 시스템은, LNG를 저장한 탱크가 선체에 설치됨에 있어 LNG 하중 및 탱크 하중으로 인하여 탱크와 선체의 결합부위에 변형을 방지하는 효과가 있다.The independent tank supporting structural system of the LNG carrier according to the present invention has an effect of preventing the deformation of the joint between the tank and the hull due to the LNG load and the tank load when the tank storing the LNG is installed on the hull.

또한 상기 방지 효과로 인하여 LNG를 원하는 목적지에 안정적으로 공급할 수 있는 효과가 있다.In addition, the LNG can be stably supplied to a desired destination due to the prevention effect.

또한 탱크를 등분포 지지하는 구조가 되고 공기를 이용하기 때문에 탱크와 선체의 결합 부위 모두를 경량화할 수 있어 건조비와 재료비가 절감되는 효과와 함께 응력 집중부가 생기지 않아 구조적으로 안전하다.In addition, since the structure that supports the tank equally is used and air is used, it is possible to reduce the weight of the joint between the tank and the hull, thereby reducing the drying cost and the material cost.

이와 함께 종래의 LNG 탱크보다 더 큰 LNG 탱크를 제조할 수 있어 LNG 적재량을 늘릴 수 있는 효과가 있다.
In addition, an LNG tank larger than that of the conventional LNG tank can be manufactured, and the LNG loading amount can be increased.

도 1은 종래의 모스(Moss)형 LNG 탱크 배치 및 탱크 지지구조를 도시한 단면도.
도 2는 종래의 SPB형 LNG 탱크 배치 및 탱크 지지구조를 도시한 단면도.
도 3은 본 발명에 따른 적도부가 연장되어 탱크용량 보다 큰 모스(MOSS)형 LNG 탱크 배치 구조에 하나의 튜브를 설치하여 도시한 단면도(LNG를 탱크에 적재하지 않은 경우).
도 4는 도 3에서 LNG를 탱크에 적재한 상태를 도시한 단면도.
도 5는 본 발명에 따른 모스(MOSS)형 LNG 탱크 배치 구조에 이중안전을 위하여 외부튜브와 내부튜브로 구성된 2중 튜브를 설치하여 도시한 단면도.
도 6은 본 발명에 따른 SPB형 LNG 탱크 배치 구조에 하나의 튜브를 설치하여 도시한 단면도(LNG를 탱크에 적재하지 않은 경우).
도 7은 도 6에서 LNG를 탱크에 적재한 상태를 도시한 단면도.1 is a cross-sectional view showing a conventional Moss-type LNG tank arrangement and a tank support structure.
2 is a sectional view showing a conventional SPB type LNG tank arrangement and a tank support structure.
FIG. 3 is a cross-sectional view of a MOSS LNG tank arrangement structure in which an equatorial portion according to the present invention is extended and has a larger capacity than a tank capacity, when the LNG is not loaded in the tank.
FIG. 4 is a sectional view showing a state in which LNG is loaded in a tank in FIG. 3; FIG.
FIG. 5 is a cross-sectional view of a MOSS type LNG tank arrangement structure according to the present invention, in which a double tube composed of an outer tube and an inner tube is installed for double safety.
6 is a cross-sectional view of a SPB type LNG tank arrangement structure according to the present invention in which one tube is installed (when LNG is not loaded in a tank).
7 is a cross-sectional view showing a state in which LNG is loaded in a tank in FIG. 6;

LNG(Liquid Natural Gas) 운반선의 경우, 기체상태의 천연가스를 -163도까지 낮추어 액체화하여 부피비가 1/600로 줄어들어 한번에 많은 양의 LNG를 운반하게 되는데 LNG 운반선을 이용하여 천연가스를 운반하려면 항구 또는 가스전에 대규모의 저온액화장치 설비가 필요하며 LNG운반선의 화물창 온도를 -163도를 유지하기 위하여 화물창 보온장치도 필요하고 일정온도를 유지하기 위하여 냉각 장치도 필요하다.In the case of LNG (Liquid Natural Gas) carriers, LNG carriers are transported in bulk at a rate of 1/600 by lowering the natural gas down to -163 ° C. In order to transport natural gas using LNG carriers, Or a large scale low temperature liquefaction facility is required for the gas field. In order to maintain the LNG carrier's cargo hold temperature at -163 ° C, a cargo hold warmer is also required and a cooling device is also required to maintain a constant temperature.

또한 액화된 LNG를 운반선에 적재할 경우에는 LNG를 저장할 수 있는 탱크를 선체에 설치하게 되는데 이때 탱크는 스커트의 지지에 의해 선체에서 떠받쳐 있는 상태로 설치된다.In addition, when liquefied LNG is loaded on the carrier, a tank capable of storing LNG is installed on the hull. The tank is mounted on the hull by the support of the skirt.

상기 탱크는 MOSS형 탱크(도 1 참조)와 SPB형 탱크(도 2 참조)로 분류된다.The tank is classified into a MOSS type tank (see FIG. 1) and an SPB type tank (see FIG. 2).

따라서 본 발명에 따른 LNG 운반선의 독립형 탱크 지지구조 시스템은, 상기 MOSS형 탱크 및 SPB형 탱크가 선체에서 떠받쳐진 구조로 설치될 때 적용되는 기술이다.Accordingly, the independent tank support structure system of the LNG carrier according to the present invention is applied when the MOSS tank and the SPB tank are installed in a structure supported by the hull.

이하 첨부된 도면을 참고로 하여 설명된다.Hereinafter, the present invention will be described with reference to the accompanying drawings.

본 발명에 있어서, 도 3에 도시된 바와 같이 MOSS형의 LNG 탱크(10)에 LNG를 적재하지 않은 상태를 도시한 것으로 LNG 탱크(10)가 선체(20)에 떠받쳐진 구조로서 LNG 탱크(10)의 외부에는 LNG 탱크 커버(5)가 포설되고 LNG 탱크(10)의 양측부가 스커트(25)와 결합고정되며 상기 스커트(25)는 선체(20)와 결합고정된 상태가 되어 LNG 탱크(10)의 하중이 스커트(25)에 집중되는 것을 보완하고자 LNG 탱크(10)와 선체(20) 사이에 형성된 공간에 튜브(T)가 설치됨에 있어 하나로 이루어진 튜브(33) 설치되고 상기 튜브(33)의 내부로 공기를 공급하기 위한 압축기(30)가 선체(20)의 양측 저부 내부에 하나씩 삽설되며 상기 두 개의 압축기(30)로부터 방출된 공기를 튜브(33) 내부로 유입하기 위한 이송노인 파이프(31)가 각각의 압축기(30)에 일측부가 연결되고 튜브(33)에 타측부가 연결되며 상기 두 개의 파이프(31) 어느 한 지점에는 압축기(30)로부터 방출된 공기를 튜브(33) 내부로 일정한 량으로 조절하여 유입하기 위한 조절밸브(32)가 각각 연결되고 튜브(33) 내부로 유입된 공기량이 초과될 때에는 초과된 공기량의 수치를 한눈에 파악할 수 있도록 압력계(35)가 구비되며 상기 압력계(35)를 통하여 초과 공기유입량을 감지하는 센스부(36)가 구비되고 상기 센스부(36)의 신호를 받아 초과 공기량을 튜브(33)에서 유출토록 하는 감압밸브(37)가 구비되며 상기 감압밸브(37)를 통하여 유출되는 초과 공기량을 외부로 배출하는 배출파이프(38)가 선체(20)의 양측부에 각각 구비되는 것을 포함하여 이루어진 구성을 특징으로 한다.3 shows a state in which LNG is not loaded in the LNG tank 10 of the MOSS type as shown in Fig. 3 and the LNG tank 10 An LNG tank cover 5 is installed on the outside of the LNG tank 10 and both side portions of the LNG tank 10 are fixedly engaged with the skirt 25 so that the skirt 25 is fixed to the hull 20, A tube 33 is installed in a space formed between the LNG tank 10 and the hull 20 so that the load of the tube 33 is concentrated on the skirt 25, A compressor 30 for supplying air to the inside of the tube 33 is inserted into both bottom portions of both sides of the hull 20 and a transfer pipe for flowing air discharged from the two compressors 30 into the tube 33 31 are connected to the respective compressors 30 at one side and the tubes 33 are connected at the other side, A control valve 32 for controlling the amount of air discharged from the compressor 30 into the tube 33 at a certain point is connected to a certain point of the pipe 31 and the amount of air introduced into the tube 33 A pressure gauge 35 is provided so that the value of the excess air amount can be grasped at a glance and a sense unit 36 for sensing the excess air inflow amount through the pressure gauge 35 is provided, And a discharge pipe 38 for discharging an excess amount of air flowing out through the pressure reducing valve 37 to the outside is provided to the outside of the hull 20, And each of which is provided on both sides thereof.

따라서 LNG 탱크(10) 내에 LNG가 액화된 상태로 적재될 경우에, 도 4에 도시된 바와 같이, LNG 탱크(10)와 선체(20) 사이의 튜브(33)에 공기가 유입된 상태가 되어 LNG 탱크(10) 하부를 튜브(33)가 받쳐주게 됨으로써 LNG 탱크(10)의 하중이 스커트(25)로 전달되는 것을 경감하게 되고 LNG 탱크(10), 스커트(25), 선체(20)로 둘러싸인 튜브(33)에 압축 공기층을 형성하여 LNG 탱크(10) 무게를 등분포로 지지하여 LNG 탱크(10)의 하중을 선체(20)에 유연하게 전달하게 된다.Therefore, when the LNG is loaded in the liquefied state in the LNG tank 10, air is introduced into the tube 33 between the LNG tank 10 and the hull 20 as shown in Fig. 4 The tube 33 is supported by the lower portion of the LNG tank 10 so that the load of the LNG tank 10 is prevented from being transmitted to the skirt 25 and the LNG tank 10 is supported by the skirt 25 and the hull 20 A compressed air layer is formed in the enclosed tube 33 to support the weight of the LNG tank 10 in an even distribution to flexibly transmit the load of the LNG tank 10 to the hull 20.

즉, LNG 탱크(10)에 LNG가 채워지지 않은 상태에서는 스커트(25)로만 LNG 탱크(10)를 지지하고 LNG 탱크(10)에 LNG가 적재되면 압축기(30)에서 생성한 공기를 파이프(31)를 통하여 선체(20)와 LNG 탱크(10) 사이의 튜브(33) 내부 공간에 주입하게 되는 것이다.That is, when the LNG tank 10 is not filled with LNG, the LNG tank 10 is supported only by the skirt 25, and when the LNG is loaded in the LNG tank 10, And is injected into the space inside the tube 33 between the hull 20 and the LNG tank 10 through the openings 33a and 33b.

물론 공기를 주입하는 튜브(33) 공간은 밀폐된 공간(Air tight)으로 구성하고 LNG 탱크(10)의 하중에 충분히 견디도록 선체(20) 구조를 구성토록 한다.Of course, the space of the tube 33 for injecting air constitutes an air tight structure and constitutes the structure of the ship 20 so as to withstand the load of the LNG tank 10.

또한 압축 공기의 양을 조절하는 조절밸브(32)는 압축기(30)로부터 공급되는 공기량을 조절하면서 튜브(33) 내부로 유입하는 역할을 수행하게 되고 튜브(33) 내부로 공기 초과 유입량이 있을 경우에는 압력계(35)가 공기 초과 유입량 수치를 한눈에 알 수 있도록 제시하는 역할을 수행하게 되며 상기 압력계(35)를 통하여 공기 초과 유입량을 감지할 수 있는 센스부(36)는 감압밸브(37)로 하여금 공기 초과 유입량을 튜브 외부로 유출토록 유도하는 역할을 수행하게 되고 상기 감압밸브(37)는 센스부(36)로부터 신호를 받아 공기 초과 유입량을 튜브(33) 외부로 배출하는 역할을 수행하게 되며 배출된 공기 초과 유입량은 배출파이프(38)를 통하여 외부로 유출하게 된다.Further, the control valve 32 for controlling the amount of compressed air functions to flow into the tube 33 while adjusting the amount of air supplied from the compressor 30, and when there is an excess air inflow into the tube 33 The pressure gauge 35 serves to present the overflow inflow quantity value at a glance and the sense unit 36 capable of sensing the excess air inflow quantity through the pressure gauge 35 is connected to the pressure reducing valve 37 And the pressure reducing valve 37 receives a signal from the sense unit 36 and discharges the excess air inflow amount to the outside of the tube 33 The excess air inflow amount is discharged to the outside through the discharge pipe 38.

상기 센스부(36)는 0.5bar 이상 또는 이하의 압력차를 감지하여 감압밸브를 작동 조절하도록 유도한다.The sense unit 36 senses a pressure difference of 0.5 bar or less and induces the control of the pressure reducing valve.

상기와 같이 구성된 본 발명의 LNG 운반선의 독립형 탱크 지지구조 시스템을 제공하게 됨으로써 LNG 탱크(10)와 선체(20)에 국부적으로 발생할 수 있는 파손을 방지하게 되고 궁극적으로는 보다 대용량의 LNG 탱크(10)를 선체(20)에 설치하여 천연가스를 많이 운송할 수 있는 선체(20)를 제공하게 되는 것이다.
By providing a system for supporting the independent tank of the LNG carrier of the present invention having the above-described structure, damage to the LNG tank 10 and the hull 20 that may occur locally is prevented, and ultimately, the LNG tank 10 To the hull 20 to provide a hull 20 capable of transporting a large amount of natural gas.

본 발명에 따른 LNG 운반선의 독립형 탱크 지지구조 시스템은 도 5에 도시된 바와 같이, LNG 탱크(10)와 선체(20) 사이로 외부튜브(34a)와 내부튜브(34b)로 이루어진 2중 튜브(34)를 택일하여 설치할 수 있다.5, a system for supporting a free-standing tank of an LNG carrier according to the present invention includes a double tube 34 composed of an outer tube 34a and an inner tube 34b between the LNG tank 10 and the hull 20 ) Can be installed.

상기 2중 튜브(34)는 외부튜브(34a)로 하여금 내부튜브(34b)를 포설한 형태로 하여 서로 결착을 이룬 구성이거나 결속수단에 의해 서로 결속을 이룬 구성임을 밝힌다.The double tube 34 has a structure in which the outer tube 34a has a structure in which the inner tube 34b is laid therebetween and are connected to each other by a binding means.

또한 상기 2중 튜브(34)가 설치될 경우에는 양 압축기(30)에 연결된 양 파이프(31)를 연결하기 위한 이음관(39)이 더 부가되어 연결되고 상기 이음관(39)의 정중앙에는 통제밸브(40)가 더 부가되어 연결됨을 밝힌다.When the double tube 34 is installed, a joint pipe 39 for connecting the both pipes 31 connected to the compressors 30 is further connected to the joint pipe 39, Valve 40 is additionally connected.

따라서 양 압축기(30) 중 어느 하나의 압축기(30)에서 공급한 공기는 파이프(31)를 따라 외부튜브(34a)로 유입되고 다른 하나의 압축기(30)에서 공급한 공기는 파이프(31)를 따라 내부튜브(34b)로 유입되며 이때 양 압축기(30)에서 공급한 공기 중 일부는 양 파이프(31)로 유입되다가 상기 양 파이프(31)에 연결된 이음관(39)으로 유입되고 상기 이음관(39)의 정중앙에 연결된 통제밸브(40)를 통하여 더 이상의 공기 진행을 차단하게 되는 것이다.The air supplied from one of the compressors 30 to the compressor 31 flows into the outer tube 34a along the pipe 31 and the air supplied from the other compressor 30 flows into the pipe 31 A part of the air supplied from both compressors 30 flows into both the pipes 31 and then flows into the connecting pipe 39 connected to the both pipes 31, 39 through the control valve 40 connected to the center of the air passage.

종국에는, 외부 튜브(34a)와 내부 튜브(34b)에 작용하는 압력이 서로 동일하게 되는데 이는 상기 외부 튜브(34a)와 내부 튜브(34b)에서의 압력차가 없다는 것을 의미하는 것이고 즉 압력이 0인 것이다.Eventually, the pressures acting on the outer tube 34a and the inner tube 34b become equal to each other, which means that there is no pressure difference between the outer tube 34a and the inner tube 34b, that is, will be.

따라서 두 개의 압축기(30)에서 공급하는 공기압이 동일하도록 작동을 연동함과 아울러 통제 밸브가 설치되어 있기 때문에 필요시 통제 밸브를 열어 외부 튜브(34a)와 내부 튜브(34b)의 압력차를 줄임으로써 공기압이 서로 동일하게 된다.Accordingly, since the operation is interlocked so that the air pressures supplied from the two compressors 30 are synchronized with each other and the control valve is provided, the pressure difference between the outer tube 34a and the inner tube 34b is reduced by opening the control valve The air pressures become equal to each other.

LNG 탱크(10)를 지지하기 위하여 압축기(10)에서 송출하는 필요한 공기압은 최대 5~10bar 정도면 된다.
The required air pressure to be delivered from the compressor 10 to support the LNG tank 10 may be up to 5 to 10 bar.

상기와 같이 구성되는 본 발명의 LNG 운반선의 독립형 탱크 지지구조 시스템은, 도 6 내지 7에 도시된 바와 같이, SPB형의 LNB 탱크(10)와 선체(20) 사이의 공간부에도 동일하게 적용할 수 있음을 밝힌다.
6 to 7, the independent tank supporting structure system of the LNG carrier of the present invention having the above-described structure is applicable to the space portion between the SPB type LNB tank 10 and the hull 20 as well .

*** 도면의 주요 부분에 대한 부호의 설명 ***
5 : LNG 탱크 커버 10 : LNG 탱크
15 : 적도부 20 : 선체
25 : 스커트 30 : 압축기
31 : 파이프 32 : 조절밸브
33 : 튜브 34 : 2중 튜브
34a: 외부튜브 34b: 내부튜브
35 : 압력계 36 : 센스부
37 : 감압밸브 38 : 배출파이프
39 : 이음관 40 : 통제밸브
T : 튜브
* 종래 부호
100 : 모스형 LNG 탱크 200 : SPB형 LNG 탱크
300 : 적도부 400 : 선체
450 : 스커트DESCRIPTION OF THE REFERENCE SYMBOLS
5: LNG tank cover 10: LNG tank
15: Equatorial portion 20: Hull
25: skirt 30: compressor
31: pipe 32: regulating valve
33: tube 34: double tube
34a: outer tube 34b: inner tube
35: pressure gauge 36: sense part
37: Pressure reducing valve 38: Exhaust pipe
39: Coupling pipe 40: Control valve
T: Tube
* Conventional code
100: Morse type LNG tank 200: SPB type LNG tank
300: Equator portion 400: Hull
450: Skirt

Claims (3)

LNG운반선의 LNG를 적재하게 되는 독립형(MOSS형 및 SPB형) LNG 탱크(10)와 운반선의 선체(20) 결합부위에 변형 방지를 위하여 LNG 탱크(10)와 선체(20)의 공간부에 삽설되어 LNG 탱크(10)를 등분포 지지하는 튜브(T)와; 선체(20)의 양측 저부 내부에 각각 삽설되어 상기 튜브(T) 내부로 공기를 공급하게 되는 두 개의 압축기(30)와; 상기 두 개의 압축기(30)와 튜브(T)에 각각 연결되어 공기를 튜브(T)로 유입하는 두 개의 파이프(31)와; 상기 두 개의 파이프(31) 어느 지점에 각각 설치되어 튜브(T) 내부로 유입되는 공기의 유입량을 조절하게 되는 두 개의 조절밸브(32)와; 상기 튜브(T) 내부로 유입되는 공기의 유입량이 초과될 경우 공기의 초과 유입량을 측정하여 제시하는 압력계(35)와; 상기 압력계(35)를 통하여 공기의 초과 유입량을 감지하는 센스부(36)와; 상기 센스부(36)의 신호를 받고 공기의 초과 유입량을 튜브(T) 외부로 유출하는 감압밸브(37)를; 포함하여 구성되는 것을 특징으로 하는 LNG 운반선의 독립형 탱크 지지구조 시스템.The LNG tank 10 and the hull 20 are inserted in the space of the LNG tank 10 and the hull 20 so as to prevent deformation in the coupling portion of the independent (MOSS type and SPB type) LNG tank 10 and the hull 20 of the carrier that will load the LNG of the LNG carrier. A tube (T) for uniformly supporting the LNG tank (10); Two compressors 30 which are respectively inserted into both bottoms of the hull 20 to supply air into the tube T; Two pipes 31 connected to the two compressors 30 and the tube T, respectively, for introducing air into the tube T; Two control valves 32 installed at respective points of the two pipes 31 to adjust an inflow amount of air introduced into the tube T; A pressure gauge 35 measuring and presenting an excess amount of air when the amount of inflow of air introduced into the tube T is exceeded; A sensing unit 36 for detecting an excess amount of inflow of air through the pressure gauge 35; A pressure reducing valve 37 which receives the signal of the sense part 36 and outflows the excess amount of air to the outside of the tube T; Independent tank support structure system of the LNG carrier, characterized in that comprising a. 제1항에 있어서,
상기 튜브(T)는, 외부 튜브(34a)와 내부 튜브(34b)로 이루어진 2중 튜브(34) 또는 하나의 튜브(33)를 택일하도록 한 것을 특징으로 하는 LNG 운반선의 독립형 탱크 지지구조 시스템.
The method of claim 1,
The tube (T) is an independent tank support structure system for an LNG carrier, characterized in that it is to choose a double tube (34) or one tube (33) consisting of an outer tube (34a) and the inner tube (34b).
제2항에 있어서,
상기 2중 튜브(34) 이용시, 두 개의 압축기(30)에 각각 연결된 파이프(31)를 서로 연결하기 위한 이음관(39)이 더 구비되고; 상기 이음관(39)의 정중앙에는 두 압축기의 연동으로 2중 튜브(34) 내의 공기압이 동일하도록 통제밸브(40)가 더 구비되는 것을; 특징으로 하는 LNG 운반선의 독립형 탱크 지지구조 시스템.The method of claim 2,
Further comprising a joint pipe (39) for connecting the pipes (31) connected to the two compressors (30) to each other when the double tube (34) is used; A control valve 40 is further provided at the center of the coupling pipe 39 so that the air pressure in the double tube 34 is equalized by interlocking the two compressors. A stand - alone tank support structure system for LNG carriers characterized by.
KR1020110133753A 2011-12-13 2011-12-13 Independent Self Supporting Tank System of LNG Carrrier KR101414787B1 (en)

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