WO2019172083A1 - Liquefied gas tank - Google Patents

Liquefied gas tank Download PDF

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Publication number
WO2019172083A1
WO2019172083A1 PCT/JP2019/007877 JP2019007877W WO2019172083A1 WO 2019172083 A1 WO2019172083 A1 WO 2019172083A1 JP 2019007877 W JP2019007877 W JP 2019007877W WO 2019172083 A1 WO2019172083 A1 WO 2019172083A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquefied gas
tank
disks
protrusion
tank body
Prior art date
Application number
PCT/JP2019/007877
Other languages
French (fr)
Japanese (ja)
Inventor
良介 浦口
巧 吉田
雄三 江口
村岸　治
一藤 後神
Original Assignee
川崎重工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 川崎重工業株式会社 filed Critical 川崎重工業株式会社
Priority to KR1020207026288A priority Critical patent/KR102433806B1/en
Priority to CN201980017339.3A priority patent/CN111819389B/en
Priority to EP19763769.7A priority patent/EP3763989B1/en
Publication of WO2019172083A1 publication Critical patent/WO2019172083A1/en

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Classifications

    • 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
    • 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
    • F17C3/08—Vessels not under pressure with provision for thermal insulation by vacuum spaces, e.g. Dewar flask
    • 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
    • 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
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0128—Shape spherical or elliptical
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0147—Shape complex
    • F17C2201/0157—Polygonal
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/03—Orientation
    • F17C2201/032—Orientation with substantially vertical main axis
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/03—Orientation
    • F17C2201/035—Orientation with substantially horizontal main axis
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/052—Size large (>1000 m3)
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/054—Size medium (>1 m3)
    • 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
    • F17C2203/0391—Thermal insulations by vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • F17C2203/0626—Multiple walls
    • F17C2203/0629—Two walls
    • 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
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0311—Closure means
    • 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
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0379—Manholes or access openings for human beings
    • 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
    • F17C2221/01—Pure fluids
    • F17C2221/012—Hydrogen
    • 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
    • F17C2221/01—Pure fluids
    • F17C2221/016—Noble gases (Ar, Kr, Xe)
    • F17C2221/017—Helium
    • 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
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/035—Propane butane, e.g. LPG, GPL
    • 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
    • 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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0135—Pumps
    • 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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0171—Arrangement
    • F17C2227/0178—Arrangement in the vessel
    • 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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/03—Dealing with losses
    • F17C2260/031—Dealing with losses due to heat transfer
    • F17C2260/033—Dealing with losses due to heat transfer by enhancing insulation
    • 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

Definitions

  • the present invention relates to a liquefied gas tank.
  • Patent Document 1 discloses a liquefied gas tank 100 as shown in FIG.
  • the liquefied gas tank 100 includes a tank main body 110 that stores the liquefied gas, and a protruding portion 120 that protrudes upward from the tank main body 110.
  • the protrusion 120 is a cavity, and the inside of the protrusion 120 communicates with the inside of the tank body 110.
  • the tank main body 110 is covered with a first heat insulating layer 130, and a portion other than the tip of the protruding portion 120 is covered with a cylindrical second heat insulating layer 140.
  • a heat insulating member 150 is disposed in the region overlapping the second heat insulating layer 140 inside the protruding portion 120.
  • the heat insulating member 150 is a metal disk-shaped box filled with foam.
  • Patent Document 1 Although the liquefied gas tank 100 disclosed in Patent Document 1 has sufficient heat insulation performance in the protrusion 120, there is a demand for further improving the heat insulation performance of the protrusion 120.
  • an object of the present invention is to provide a liquefied gas tank capable of improving the heat insulating performance of the protruding portion as compared with the conventional art.
  • the inventors of the present invention pay attention to the fact that the vaporized gas vaporized by the liquefied gas is convected in the protrusion, and improve the heat insulating performance of the protrusion by suppressing this convection. I found out that I can.
  • the present invention has been made from such a viewpoint.
  • the liquefied gas tank of the present invention includes a tank main body that stores liquefied gas, a hollow projecting portion that projects upward from the tank main body and communicates with the inside of the tank main body, and a first covering the tank main body.
  • a disk that partitions the inside of the portion into a plurality of cells arranged in the protruding direction of the protruding portion.
  • a manhole is provided at the tip of the protrusion, and each of the plurality of disks may be provided with a manhole and a manhole cover for opening and closing the manhole. According to this configuration, an operator can check the inside of the tank body through the inside of the protruding portion.
  • the manhole cover may be slidably attached to the disk other than the uppermost disk among the plurality of disks. According to this configuration, the disks can be arranged with a small pitch.
  • the protrusion may include a peripheral wall rising from the tank body and a ceiling wall that closes an upper opening of the peripheral wall, and the plurality of disks may be attached to an inner peripheral surface of the peripheral wall.
  • Each of the plurality of disks may be a metal plate.
  • Each disk may be a metal disk-shaped box filled with foam, but if each disk is a metal plate, the cost can be reduced.
  • the first heat insulating layer includes an outer tub that surrounds the tank main body while being separated from the tank main body, and a first vacuum space between the outer tub and the tank main body, and the second heat insulating layer is the outer tub.
  • the tank main body and the first heat insulating layer constitute a vacuum double shell structure
  • the protrusion and the second heat insulating layer constitute a vacuum double shell structure. The heat intrusion can be further suppressed.
  • the heat insulation performance of the protruding portion of the liquefied gas tank can be improved as compared with the conventional case.
  • FIG. 2 is a transverse sectional view taken along line II-II in FIG. It is a longitudinal cross-sectional view of a part of a conventional liquefied gas tank.
  • the liquefied gas tank 1 includes a tank body 2 that stores liquefied gas, and a protruding portion 3 that protrudes upward from the tank body 2.
  • the liquefied gas tank 1 may be mounted on a ship such as a liquefied gas carrier ship or may be installed on the ground.
  • liquefied gas examples include liquefied petroleum gas (LPG, about ⁇ 45 ° C.), liquefied ethylene gas (LEG, about ⁇ 100 ° C.), liquefied natural gas (LNG, about ⁇ 160 ° C.), liquefied hydrogen (LH 2 , about ⁇ 250 ° C.) and liquefied helium (LHe, about ⁇ 270 ° C.).
  • LPG liquefied petroleum gas
  • LEG liquefied ethylene gas
  • LNG liquefied natural gas
  • LH 2 liquefied hydrogen
  • LHe liquefied helium
  • the shape of the tank body 2 is not particularly limited, and may be a spherical shape or a cylindrical shape extending in the horizontal direction or the vertical direction. Alternatively, the shape of the tank body 2 may be a cubic shape or a rectangular parallelepiped shape.
  • the protruding direction of the protruding portion 3 is parallel to the vertical direction in this embodiment, but may be slightly inclined with respect to the vertical direction.
  • the protruding portion 3 is a dome that is penetrated by a plurality (two in the illustrated example) of the pipes 7.
  • One of the pipes 7 is for guiding the liquefied gas pumped up by the pump disposed in the tank body 2 to the outside.
  • the protrusion 3 is a hollow, and the inside of the protrusion 3 communicates with the inside of the tank body 2. More specifically, the protrusion 3 includes a peripheral wall 31 that rises from the tank body 2 and a ceiling wall 32 that closes the upper opening of the peripheral wall 31.
  • the pipe 7 described above extends in the vertical direction and penetrates the ceiling wall 32.
  • the upper end portion of the peripheral wall 31 and the ceiling wall 32 constitute the tip portion of the protruding portion 3.
  • a manhole 33 is provided in the ceiling wall 32 (tip portion) of the protruding portion 3.
  • the manhole 33 is formed by a manhole tube 34 joined to the ceiling wall 32, and is opened and closed by a manhole cover 35.
  • the manhole cover 35 is fixed to a flange provided at the upper end of the manhole tube 34 by a bolt or the like when the manhole 33 is closed, and is removed from the manhole tube 34 when the manhole 33 is opened.
  • the opening of the projecting portion 3 for opening and closing a device such as a pump into and out of the tank body 2 that is opened and closed by a door or a lid is the manhole 33. It may be provided separately.
  • each of the first heat insulation layer 4 and the second heat insulation layer 5 includes a vacuum space.
  • each of the 1st heat insulation layer 4 and the 2nd heat insulation layer 5 may be comprised with the some heat insulating material (for example, vacuum heat insulation panel) arranged in the surface of the tank main body 2 or the protrusion part 3.
  • FIG. Alternatively, each of the first heat insulation layer 4 and the second heat insulation layer 5 may be a simple foam. In this case, each of the 1st heat insulation layer 4 and the 2nd heat insulation layer 5 may be comprised with several foam panel.
  • the first heat insulating layer 4 includes an outer tank 41 surrounding the tank body 2 while being separated from the tank body 2, and a first vacuum space 42 between the outer tank 41 and the tank body 2.
  • the second heat insulating layer 5 rises from the outer tub 41 and is orthogonal to the protruding direction of the protruding portion 3, which connects the outer tube 51 surrounding the portion other than the tip of the protruding portion 3 and the upper end of the outer tube 51 and the protruding portion 3.
  • a ring plate 52 flat in a direction (horizontal direction in the present embodiment) and a second vacuum space 53 between the outer tube 51 and the protruding portion 3 are included.
  • the second vacuum space 53 communicates with the first vacuum space 42.
  • Each of the disks 6A to 6C is flat in a direction orthogonal to the protruding direction of the protruding portion 3, and is attached to the inner peripheral surface of the peripheral wall 31 of the protruding portion 3.
  • the inside of the protruding portion 3 is partitioned into a plurality of cells 30 arranged in the protruding direction of the protruding portion 3.
  • each disk may be directly attached to the inner peripheral surface of the peripheral wall 31 or indirectly attached to the inner peripheral surface of the peripheral wall 31 via a member (not shown) having an L-shaped cross section. May be.
  • each of the disks 6A to 6C is a metal plate.
  • Each of the disks 6A to 6C may be a metal disk-shaped box filled with foam, but if each of the disks 6A to 6C is a metal plate, the cost can be reduced.
  • a manhole 61 is provided at a position corresponding to the manhole 33 described above.
  • a manhole cover 62 for opening and closing the manhole 61 is attached to each of the disks 6A to 6C.
  • a manhole cover 62 is attached to the uppermost disk 6A so as to be able to swing (swing) via a hinge (not shown), and the manhole cover 62 is attached to the other disks 6B and 6C. It is slidably attached via a slide mechanism (not shown).
  • the tank main body 2 is externally transmitted through all the disks 6A to 6C. It is possible to suppress heat penetration into the inside. Thereby, the heat insulation performance of the protrusion part 3 can be improved. This effect can be obtained regardless of the configuration of the disks 6A to 6C (whether it is a metal plate or a metal disk-like box filled with foam).
  • the manhole cover 62 attached to the uppermost disk 6A can be easily operated by swinging. Further, since the manhole cover 62 attached to the other disks 6B and 6C is slidable, the disks 6A to 6C can be arranged at a small pitch. However, the pitch of the disks 6A to 6C may be increased, and the manhole cover 62 attached to the disks 6B and 6C may be of a swing type. Alternatively, the manhole cover 62 attached to all the disks 6A to 6C may be slidable.
  • the tank body 2 and the first heat insulating layer 4 constitute a vacuum double shell structure
  • the protrusion 3 and the second heat insulating layer 5 constitute a vacuum double shell structure. Heat intrusion into the main body 2 can be further suppressed.
  • the protruding portion 3 does not necessarily have to be a dome that is penetrated by the pipe 7, and may be a manhole portion that is smaller than the dome.
  • the protruding portion 3 may be configured only by the manhole tube 34 and the manhole cover 35.

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Abstract

This liquefied gas tank is provided with a tank main body for storing liquefied gas, a hollow projecting portion which projects upward from the tank main body and the interior of which communicates with the interior of the tank main body, a first heat insulating layer covering the tank main body, a tubular second heat insulating layer covering the projecting portion excluding a distal end portion thereof, and a plurality of disks which are disposed in a region overlapping the second heat insulating layer in the interior of the projecting portion, and which partition the interior of the projecting portion into a plurality of cells aligned side-by-side in the direction in which the projecting portion projects.

Description

液化ガスタンクLiquefied gas tank
　本発明は、液化ガスタンクに関する。 The present invention relates to a liquefied gas tank.
　従来から、低温の液化ガス用の液化ガスタンクが知られている。例えば、特許文献１には、図３に示すような液化ガスタンク１００が開示されている。 Conventionally, a liquefied gas tank for low-temperature liquefied gas is known. For example, Patent Document 1 discloses a liquefied gas tank 100 as shown in FIG.
　液化ガスタンク１００は、液化ガスを貯留するタンク本体１１０と、タンク本体１１０から上向きに突出する突出部１２０を含む。突出部１２０は空洞であり、突出部１２０の内部はタンク本体１１０の内部と連通している。タンク本体１１０は第１断熱層１３０で覆われ、突出部１２０の先端部以外は筒状の第２断熱層１４０で覆われている。 The liquefied gas tank 100 includes a tank main body 110 that stores the liquefied gas, and a protruding portion 120 that protrudes upward from the tank main body 110. The protrusion 120 is a cavity, and the inside of the protrusion 120 communicates with the inside of the tank body 110. The tank main body 110 is covered with a first heat insulating layer 130, and a portion other than the tip of the protruding portion 120 is covered with a cylindrical second heat insulating layer 140.
　突出部１２０の内部における第２断熱層１４０と重なり合う領域内には、防熱部材１５０が配置されている。防熱部材１５０は、金属製のディスク状の箱の中に発泡体を充填したものである。 In the region overlapping the second heat insulating layer 140 inside the protruding portion 120, a heat insulating member 150 is disposed. The heat insulating member 150 is a metal disk-shaped box filled with foam.
実開昭５５－８９８９８号公報Japanese Utility Model Publication No. 55-89898
　特許文献１に開示された液化ガスタンク１００でも突出部１２０における断熱性能は十分であるものの、さらに突出部１２０の断熱性能を向上したいという要望がある。 Although the liquefied gas tank 100 disclosed in Patent Document 1 has sufficient heat insulation performance in the protrusion 120, there is a demand for further improving the heat insulation performance of the protrusion 120.
　そこで、本発明は、従来よりも突出部の断熱性能を向上させることができる液化ガスタンクを提供することを目的とする。 Therefore, an object of the present invention is to provide a liquefied gas tank capable of improving the heat insulating performance of the protruding portion as compared with the conventional art.
　前記課題を解決するために、本発明の発明者らは、突出部内では液化ガスが気化した気化ガスが対流することに着目し、この対流を抑制することで突出部の断熱性能を向上させることができることを見出した。本発明は、このような観点からなされたものである。 In order to solve the above-mentioned problems, the inventors of the present invention pay attention to the fact that the vaporized gas vaporized by the liquefied gas is convected in the protrusion, and improve the heat insulating performance of the protrusion by suppressing this convection. I found out that I can. The present invention has been made from such a viewpoint.
　すなわち、本発明の液化ガスタンクは、液化ガスを貯留するタンク本体と、前記タンク本体から上向きに突出する、内部が前記タンク本体の内部と連通する空洞の突出部と、前記タンク本体を覆う第１断熱層と、前記突出部の先端部以外を覆う筒状の第２断熱層と、前記突出部の内部における前記第２断熱層と重なり合う領域内に配置された複数のディスクであって、前記突出部の内部を前記突出部の突出方向に並ぶ複数のセルに仕切るディスクと、を備える、ことを特徴とする。 That is, the liquefied gas tank of the present invention includes a tank main body that stores liquefied gas, a hollow projecting portion that projects upward from the tank main body and communicates with the inside of the tank main body, and a first covering the tank main body. A plurality of discs arranged in a region overlapping with the second heat insulating layer inside the protrusion, and a heat insulating layer, a cylindrical second heat insulating layer that covers other than the tip of the protrusion, and the protrusion And a disk that partitions the inside of the portion into a plurality of cells arranged in the protruding direction of the protruding portion.
　上記の構成によれば、突出部内では各セル内での小さな対流しか生じないので、全てのディスクを透過するような外部からタンク本体の内部への熱侵入を抑制することができる。これにより、突出部の断熱性能を向上させることができる。 According to the above configuration, since only a small convection in each cell is generated in the protruding portion, it is possible to suppress the heat intrusion from the outside through the entire disk body to the inside of the tank body. Thereby, the heat insulation performance of a protrusion part can be improved.
　前記突出部の先端部には、マンホールが設けられており、前記複数のディスクのそれぞれには、マンホールが設けられているとともに、前記マンホールを開閉するマンホール蓋が取り付けられていてもよい。この構成によれば、作業員が突出部の内部を通ってタンク本体の内部を点検することができる。 A manhole is provided at the tip of the protrusion, and each of the plurality of disks may be provided with a manhole and a manhole cover for opening and closing the manhole. According to this configuration, an operator can check the inside of the tank body through the inside of the protruding portion.
　前記複数のディスクのうち最も上方に位置するディスク以外のディスクには、前記マンホール蓋が当該ディスクに沿ってスライド可能に取り付けられていてもよい。この構成によれば、ディスクを小さなピッチで配置することができる。 The manhole cover may be slidably attached to the disk other than the uppermost disk among the plurality of disks. According to this configuration, the disks can be arranged with a small pitch.
　例えば、前記突出部は、前記タンク本体から立ち上がる周壁と、前記周壁の上側開口を閉塞する天井壁を含み、前記複数のディスクは、前記周壁の内周面に取り付けられていてもよい。 For example, the protrusion may include a peripheral wall rising from the tank body and a ceiling wall that closes an upper opening of the peripheral wall, and the plurality of disks may be attached to an inner peripheral surface of the peripheral wall.
　前記複数のディスクのそれぞれは、金属板であってもよい。各ディスクは金属製のディスク状の箱の中に発泡体を充填したものであってもよいが、各ディスクが金属板であればコストを低減することができる。 Each of the plurality of disks may be a metal plate. Each disk may be a metal disk-shaped box filled with foam, but if each disk is a metal plate, the cost can be reduced.
　前記第１断熱層は、前記タンク本体から離間しながら前記タンク本体を取り囲む外槽と、前記外槽と前記タンク本体の間の第１真空空間を含み、前記第２断熱層は、前記外槽から立ち上がり、前記突出部の先端部以外を取り囲む外管と、前記外管の上端と前記突出部とを連結するリング板と、前記外管と前記突出部の間の第２真空空間を含んでもよい。この構成によれば、タンク本体と第１断熱層とが真空二重殻構造を構成するとともに突出部と第２断熱層とが真空二重殻構造を構成するので、外部からタンク本体の内部への熱侵入をいっそう抑制することができる。 The first heat insulating layer includes an outer tub that surrounds the tank main body while being separated from the tank main body, and a first vacuum space between the outer tub and the tank main body, and the second heat insulating layer is the outer tub. Including an outer tube surrounding the projecting portion other than the tip, a ring plate connecting the upper end of the outer tube and the projecting portion, and a second vacuum space between the outer tube and the projecting portion. Good. According to this configuration, the tank main body and the first heat insulating layer constitute a vacuum double shell structure, and the protrusion and the second heat insulating layer constitute a vacuum double shell structure. The heat intrusion can be further suppressed.
　本発明によれば、液化ガスタンクの突出部の断熱性能を従来よりも向上させることができる。 According to the present invention, the heat insulation performance of the protruding portion of the liquefied gas tank can be improved as compared with the conventional case.
本発明の一実施形態に係る液化ガスタンクの一部の縦断面図である。It is a longitudinal section of some liquefied gas tanks concerning one embodiment of the present invention. 図１のII－II線に沿った横断面図である。FIG. 2 is a transverse sectional view taken along line II-II in FIG. 従来の液化ガスタンクの一部の縦断面図である。It is a longitudinal cross-sectional view of a part of a conventional liquefied gas tank.
　図１および図２に、本発明の一実施形態に係る液化ガスタンク１を示す。この液化ガスタンク１は、液化ガスを貯留するタンク本体２と、タンク本体２から上向きに突出する突出部３を含む。液化ガスタンク１は、液化ガス運搬船などの船舶に搭載されてもよいし、地上に設置されてもよい。 1 and 2 show a liquefied gas tank 1 according to an embodiment of the present invention. The liquefied gas tank 1 includes a tank body 2 that stores liquefied gas, and a protruding portion 3 that protrudes upward from the tank body 2. The liquefied gas tank 1 may be mounted on a ship such as a liquefied gas carrier ship or may be installed on the ground.
　液化ガスは、例えば、液化石油ガス（ＬＰＧ、約－４５℃）、液化エチレンガス（ＬＥＧ、約－１００℃）、液化天然ガス（ＬＮＧ、約－１６０℃）、液化水素（ＬＨ2、約－２５０℃）、液化ヘリウム（ＬＨｅ、約－２７０℃）である。 Examples of the liquefied gas include liquefied petroleum gas (LPG, about −45 ° C.), liquefied ethylene gas (LEG, about −100 ° C.), liquefied natural gas (LNG, about −160 ° C.), liquefied hydrogen (LH 2 , about − 250 ° C.) and liquefied helium (LHe, about −270 ° C.).
　タンク本体２の形状は、特に限定されるものではなく、球形状であってもよいし、水平方向または鉛直方向に延びる円筒状であってもよい。あるいは、タンク本体２の形状は、立方体状または直方体状であってもよい。 The shape of the tank body 2 is not particularly limited, and may be a spherical shape or a cylindrical shape extending in the horizontal direction or the vertical direction. Alternatively, the shape of the tank body 2 may be a cubic shape or a rectangular parallelepiped shape.
　突出部３の突出方向は、本実施形態では鉛直方向と平行であるが、鉛直方向に対して多少傾いていてもよい。本実施形態では、突出部３は、複数（図例では２つ）の配管７によって貫通されるドームである。配管７のうちの１つは、タンク本体２内に配置されたポンプによって汲み上げられる液化ガスを外部へ導くためのものである。 The protruding direction of the protruding portion 3 is parallel to the vertical direction in this embodiment, but may be slightly inclined with respect to the vertical direction. In the present embodiment, the protruding portion 3 is a dome that is penetrated by a plurality (two in the illustrated example) of the pipes 7. One of the pipes 7 is for guiding the liquefied gas pumped up by the pump disposed in the tank body 2 to the outside.
　突出部３は空洞であり、突出部３の内部はタンク本体２の内部と連通している。より詳しくは、突出部３は、タンク本体２から立ち上がる周壁３１と、周壁３１の上側開口を閉塞する天井壁３２を含む。上述した配管７は、鉛直方向に延びていて天井壁３２を貫通している。周壁３１の上端部と天井壁３２が突出部３の先端部を構成する。 The protrusion 3 is a hollow, and the inside of the protrusion 3 communicates with the inside of the tank body 2. More specifically, the protrusion 3 includes a peripheral wall 31 that rises from the tank body 2 and a ceiling wall 32 that closes the upper opening of the peripheral wall 31. The pipe 7 described above extends in the vertical direction and penetrates the ceiling wall 32. The upper end portion of the peripheral wall 31 and the ceiling wall 32 constitute the tip portion of the protruding portion 3.
　本実施形態では、突出部３の天井壁３２（先端部）にマンホール３３が設けられている。マンホール３３は、天井壁３２に接合されたマンホール管３４によって形成され、マンホール蓋３５によって開閉される。マンホール蓋３５は、マンホール３３を閉じるときはマンホール管３４の上端に設けられたフランジにボルトなどによって固定され、マンホール３３を開くときにマンホール管３４から取り外される。なお、突出部３の先端部には、タンク本体２の内部へポンプなどの機器を搬入したり内部から搬出したりするための開口であって扉や蓋によって開閉される開口がマンホール３３とは別に設けられてもよい。 In the present embodiment, a manhole 33 is provided in the ceiling wall 32 (tip portion) of the protruding portion 3. The manhole 33 is formed by a manhole tube 34 joined to the ceiling wall 32, and is opened and closed by a manhole cover 35. The manhole cover 35 is fixed to a flange provided at the upper end of the manhole tube 34 by a bolt or the like when the manhole 33 is closed, and is removed from the manhole tube 34 when the manhole 33 is opened. Note that the opening of the projecting portion 3 for opening and closing a device such as a pump into and out of the tank body 2 that is opened and closed by a door or a lid is the manhole 33. It may be provided separately.
　タンク本体２は第１断熱層４で覆われ、突出部３の先端部以外は筒状の第２断熱層５で覆われている。本実施形態では、第１断熱層４および第２断熱層５のそれぞれが真空空間を含む。ただし、第１断熱層４および第２断熱層５のそれぞれは、タンク本体２または突出部３の表面に並べられる複数の断熱材（例えば、真空断熱パネル）で構成されてもよい。あるいは、第１断熱層４および第２断熱層５のそれぞれは、単なる発泡体であってもよい。この場合、第１断熱層４および第２断熱層５のそれぞれは、複数の発泡パネルで構成されてもよい。 The tank body 2 is covered with a first heat insulating layer 4, and a portion other than the tip of the protruding portion 3 is covered with a cylindrical second heat insulating layer 5. In the present embodiment, each of the first heat insulation layer 4 and the second heat insulation layer 5 includes a vacuum space. However, each of the 1st heat insulation layer 4 and the 2nd heat insulation layer 5 may be comprised with the some heat insulating material (for example, vacuum heat insulation panel) arranged in the surface of the tank main body 2 or the protrusion part 3. FIG. Alternatively, each of the first heat insulation layer 4 and the second heat insulation layer 5 may be a simple foam. In this case, each of the 1st heat insulation layer 4 and the 2nd heat insulation layer 5 may be comprised with several foam panel.
　具体的に、第１断熱層４は、タンク本体２から離間しながらタンク本体２を取り囲む外槽４１と、外槽４１とタンク本体２の間の第１真空空間４２を含む。第２断熱層５は、外槽４１から立ち上がり、突出部３の先端部以外を取り囲む外管５１と、外管５１の上端と突出部３とを連結する、突出部３の突出方向と直交する方向（本実施形態では水平方向）にフラットなリング板５２と、外管５１と突出部３の間の第２真空空間５３を含む。第２真空空間５３は、第１真空空間４２と連通している。 Specifically, the first heat insulating layer 4 includes an outer tank 41 surrounding the tank body 2 while being separated from the tank body 2, and a first vacuum space 42 between the outer tank 41 and the tank body 2. The second heat insulating layer 5 rises from the outer tub 41 and is orthogonal to the protruding direction of the protruding portion 3, which connects the outer tube 51 surrounding the portion other than the tip of the protruding portion 3 and the upper end of the outer tube 51 and the protruding portion 3. A ring plate 52 flat in a direction (horizontal direction in the present embodiment) and a second vacuum space 53 between the outer tube 51 and the protruding portion 3 are included. The second vacuum space 53 communicates with the first vacuum space 42.
　突出部３の内部における第２断熱層５と重なり合う領域、換言すれば、突出部３の内部における第２断熱層５の上端よりも下方の領域内には、突出部３の突出方向に並ぶように３枚のディスク６Ａ～６Ｃが配置されている。ただし、ディスクの数は、複数であれば何枚であってもよい。ディスク６Ａ～６Ｃは、上述した配管７によって貫通されている。 In the region overlapping the second heat insulating layer 5 inside the protruding portion 3, in other words, in the region below the upper end of the second heat insulating layer 5 inside the protruding portion 3, it is arranged in the protruding direction of the protruding portion 3. Three disks 6A to 6C are arranged. However, the number of disks may be any number as long as it is plural. The disks 6A to 6C are penetrated by the pipe 7 described above.
　ディスク６Ａ～６Ｃのそれぞれは、突出部３の突出方向と直交する方向にフラットであり、突出部３の周壁３１の内周面に取り付けられている。これらのディスク６Ａ～６Ｃによって、突出部３の内部が突出部３の突出方向に並ぶ複数のセル３０に仕切られている。 Each of the disks 6A to 6C is flat in a direction orthogonal to the protruding direction of the protruding portion 3, and is attached to the inner peripheral surface of the peripheral wall 31 of the protruding portion 3. By these discs 6A to 6C, the inside of the protruding portion 3 is partitioned into a plurality of cells 30 arranged in the protruding direction of the protruding portion 3.
　各ディスクの周壁３１の内周面への取り付け方法としては種々の方法が採用可能である。例えば、各ディスクは、周壁３１の内周面に直接的に取り付けられてもよいし、断面Ｌ字状の部材（図示せず）などを介して周壁３１の内周面に間接的に取り付けられてもよい。 Various methods can be adopted as the method of attaching each disk to the inner peripheral surface of the peripheral wall 31. For example, each disk may be directly attached to the inner peripheral surface of the peripheral wall 31 or indirectly attached to the inner peripheral surface of the peripheral wall 31 via a member (not shown) having an L-shaped cross section. May be.
　本実施形態では、ディスク６Ａ～６Ｃのそれぞれが金属板である。ディスク６Ａ～６Ｃのそれぞれは金属製のディスク状の箱の中に発泡体を充填したものであってもよいが、ディスク６Ａ～６Ｃのそれぞれが金属板であればコストを低減することができる。 In this embodiment, each of the disks 6A to 6C is a metal plate. Each of the disks 6A to 6C may be a metal disk-shaped box filled with foam, but if each of the disks 6A to 6C is a metal plate, the cost can be reduced.
　ディスク６Ａ～６Ｃのそれぞれには、上述したマンホール３３と対応する位置にマンホール６１が設けられている。また、ディスク６Ａ～６Ｃのそれぞれには、マンホール６１を開閉するマンホール蓋６２が取り付けられている。 In each of the disks 6A to 6C, a manhole 61 is provided at a position corresponding to the manhole 33 described above. A manhole cover 62 for opening and closing the manhole 61 is attached to each of the disks 6A to 6C.
　より詳しくは、最も上方に位置するディスク６Ａには、マンホール蓋６２が図略のヒンジを介して揺動（スイング）可能に取り付けられており、その他のディスク６Ｂ，６Ｃには、マンホール蓋６２が図略のスライド機構を介してスライド可能に取り付けられている。 More specifically, a manhole cover 62 is attached to the uppermost disk 6A so as to be able to swing (swing) via a hinge (not shown), and the manhole cover 62 is attached to the other disks 6B and 6C. It is slidably attached via a slide mechanism (not shown).
　以上説明したように、本実施形態の液化ガスタンク１では、突出部３内では各セル３０内での小さな対流しか生じないので、全てのディスク６Ａ～６Ｃを透過するような外部からタンク本体２の内部への熱侵入を抑制することができる。これにより、突出部３の断熱性能を向上させることができる。なお、この効果は、ディスク６Ａ～６Ｃの構成（金属板であるか、金属製のディスク状の箱の中に発泡体を充填したものであるかなど）に拘らずに得ることができる。 As described above, in the liquefied gas tank 1 of the present embodiment, only a small convection in each cell 30 is generated in the protruding portion 3, so that the tank main body 2 is externally transmitted through all the disks 6A to 6C. It is possible to suppress heat penetration into the inside. Thereby, the heat insulation performance of the protrusion part 3 can be improved. This effect can be obtained regardless of the configuration of the disks 6A to 6C (whether it is a metal plate or a metal disk-like box filled with foam).
　また、本実施形態では、突出部３の先端部およびディスク６Ａ～６Ｃにマンホール３３，６１が設けられているので、作業員が突出部３の内部を通ってタンク本体２の内部を点検することができる。 In this embodiment, since the manholes 33 and 61 are provided in the front end portion of the protruding portion 3 and the disks 6A to 6C, an operator checks the inside of the tank body 2 through the inside of the protruding portion 3. Can do.
　さらに、本実施形態では、最も上方に位置するディスク６Ａに取り付けられたマンホール蓋６２を揺動によって簡単に操作することができる。また、その他のディスク６Ｂ，６Ｃに取り付けられたマンホール蓋６２はスライド可能であるので、ディスク６Ａ～６Ｃを小さなピッチで配置することができる。ただし、ディスク６Ａ～６Ｃのピッチを大きくして、ディスク６Ｂ，６Ｃに取り付けられるマンホール蓋６２を揺動式としてもよい。あるいは、全てのディスク６Ａ～６Ｃに取り付けられるマンホール蓋６２をスライド式としてもよい。 Furthermore, in this embodiment, the manhole cover 62 attached to the uppermost disk 6A can be easily operated by swinging. Further, since the manhole cover 62 attached to the other disks 6B and 6C is slidable, the disks 6A to 6C can be arranged at a small pitch. However, the pitch of the disks 6A to 6C may be increased, and the manhole cover 62 attached to the disks 6B and 6C may be of a swing type. Alternatively, the manhole cover 62 attached to all the disks 6A to 6C may be slidable.
　また、本実施形態ではタンク本体２と第１断熱層４とが真空二重殻構造を構成するとともに突出部３と第２断熱層５とが真空二重殻構造を構成するので、外部からタンク本体２の内部への熱侵入をいっそう抑制することができる。 In the present embodiment, the tank body 2 and the first heat insulating layer 4 constitute a vacuum double shell structure, and the protrusion 3 and the second heat insulating layer 5 constitute a vacuum double shell structure. Heat intrusion into the main body 2 can be further suppressed.
　（変形例）
　本発明は上述した実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲で種々の変形が可能である。 (Modification)
The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.
　例えば、突出部３は、必ずしも配管７によって貫通されるドームである必要はなく、ドームより小型のマンホール部であってもよい。この場合、突出部３は、マンホール管３４とマンホール蓋３５のみで構成されてもよい。 For example, the protruding portion 3 does not necessarily have to be a dome that is penetrated by the pipe 7, and may be a manhole portion that is smaller than the dome. In this case, the protruding portion 3 may be configured only by the manhole tube 34 and the manhole cover 35.
　１　　液化ガスタンク
　２　　タンク本体
　３　　突出部
　３０　セル
　３１　周壁
　３２　天井壁
　４　　第１断熱層
　４１　外槽
　４２　第１真空空間
　５　　第２断熱層
　５１　外管
　５２　リング板
　５３　第２真空空間
　６Ａ～６Ｃ　ディスク
　６１　マンホール
　６２　マンホール蓋
　７　　配管 DESCRIPTION OF SYMBOLS 1 Liquefied gas tank 2 Tank main body 3 Protrusion part 30 Cell 31 Perimeter wall 32 Ceiling wall 4 1st heat insulation layer 41 Outer tank 42 1st vacuum space 5 2nd heat insulation layer 51 Outer pipe 52 Ring plate 53 2nd vacuum space 6A-6C Disc 61 Manhole 62 Manhole cover 7 Piping

Claims (6)

  1. 　液化ガスを貯留するタンク本体と、
    　前記タンク本体から上向きに突出する、内部が前記タンク本体の内部と連通する空洞の突出部と、
    　前記タンク本体を覆う第１断熱層と、
    　前記突出部の先端部以外を覆う筒状の第２断熱層と、
    　前記突出部の内部における前記第２断熱層と重なり合う領域内に配置された複数のディスクであって、前記突出部の内部を前記突出部の突出方向に並ぶ複数のセルに仕切るディスクと、
    を備える、液化ガスタンク。     A tank body for storing liquefied gas;
    Projecting upward from the tank body, and a hollow projecting portion in which the interior communicates with the interior of the tank body;
    A first heat insulating layer covering the tank body;
    A cylindrical second heat-insulating layer covering other than the tip of the protruding portion;
    A plurality of disks arranged in a region overlapping with the second heat insulating layer inside the protrusion, the disk partitioning the inside of the protrusion into a plurality of cells arranged in the protrusion direction of the protrusion;
    A liquefied gas tank.
  2. 　前記突出部の先端部には、マンホールが設けられており、
    　前記複数のディスクのそれぞれには、マンホールが設けられているとともに、前記マンホールを開閉するマンホール蓋が取り付けられている、請求項１に記載の液化ガスタンク。     A manhole is provided at the tip of the protrusion,
    2. The liquefied gas tank according to claim 1, wherein each of the plurality of disks is provided with a manhole and a manhole cover for opening and closing the manhole.
  3. 　前記複数のディスクのうち最も上方に位置するディスク以外のディスクには、前記マンホール蓋が当該ディスクに沿ってスライド可能に取り付けられている、請求項２に記載の液化ガスタンク。 The liquefied gas tank according to claim 2, wherein the manhole cover is slidably attached along the disk to a disk other than the uppermost disk among the plurality of disks.
  4. 　前記突出部は、前記タンク本体から立ち上がる周壁と、前記周壁の上側開口を閉塞する天井壁を含み、
    　前記複数のディスクは、前記周壁の内周面に取り付けられている、請求項１～３の何れか一項に記載の液化ガスタンク。     The protrusion includes a peripheral wall rising from the tank body, and a ceiling wall that closes an upper opening of the peripheral wall,
    The liquefied gas tank according to any one of claims 1 to 3, wherein the plurality of disks are attached to an inner peripheral surface of the peripheral wall.
  5. 　前記複数のディスクのそれぞれは、金属板である、請求項１～４の何れか一項に記載の液化ガスタンク。 The liquefied gas tank according to any one of claims 1 to 4, wherein each of the plurality of disks is a metal plate.
  6. 　前記第１断熱層は、前記タンク本体から離間しながら前記タンク本体を取り囲む外槽と、前記外槽と前記タンク本体の間の第１真空空間を含み、
    　前記第２断熱層は、前記外槽から立ち上がり、前記突出部の先端部以外を取り囲む外管と、前記外管の上端と前記突出部とを連結するリング板と、前記外管と前記突出部の間の第２真空空間を含む、請求項１～５の何れか一項に記載の液化ガスタンク。     The first heat insulation layer includes an outer tank that surrounds the tank body while being separated from the tank body, and a first vacuum space between the outer tank and the tank body,
    The second heat insulation layer rises from the outer tub and surrounds an outer tube that surrounds other than the tip of the protruding portion, a ring plate that connects the upper end of the outer tube and the protruding portion, the outer tube, and the protruding portion. The liquefied gas tank according to any one of claims 1 to 5, comprising a second vacuum space between the two.
PCT/JP2019/007877 2018-03-07 2019-02-28 Liquefied gas tank WO2019172083A1 (en)

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CN201980017339.3A CN111819389B (en) 2018-03-07 2019-02-28 Liquefied gas cylinder
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JP2019157868A (en) 2019-09-19

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