EP4056460A1 - Cargo tank unit and ship - Google Patents
Cargo tank unit and ship Download PDFInfo
- Publication number
- EP4056460A1 EP4056460A1 EP20906698.4A EP20906698A EP4056460A1 EP 4056460 A1 EP4056460 A1 EP 4056460A1 EP 20906698 A EP20906698 A EP 20906698A EP 4056460 A1 EP4056460 A1 EP 4056460A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cargo tank
- skirt
- tank
- cargo
- lower half
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 238000005304 joining Methods 0.000 claims description 22
- 230000002093 peripheral effect Effects 0.000 description 16
- 239000007789 gas Substances 0.000 description 9
- 238000003466 welding Methods 0.000 description 7
- IHQKEDIOMGYHEB-UHFFFAOYSA-M sodium dimethylarsinate Chemical class [Na+].C[As](C)([O-])=O IHQKEDIOMGYHEB-UHFFFAOYSA-M 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000003949 liquefied natural gas Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- 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
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
- B63B73/40—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms characterised by joining methods
- B63B73/43—Welding, e.g. laser welding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/08—Mounting arrangements for vessels
- F17C13/082—Mounting arrangements for vessels for large sea-borne storage vessels
-
- 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
-
- 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
- F17C2201/05—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
- 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
-
- 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
- F17C2203/0634—Materials for walls or layers thereof
- F17C2203/0636—Metals
- F17C2203/0646—Aluminium
-
- 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
- F17C2205/01—Mounting arrangements
- F17C2205/0153—Details of mounting arrangements
- F17C2205/018—Supporting feet
-
- 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
- F17C2205/01—Mounting arrangements
- F17C2205/0153—Details of mounting arrangements
- F17C2205/0192—Details of mounting arrangements with external bearing 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
- F17C2209/00—Vessel construction, in particular methods of manufacturing
- F17C2209/22—Assembling processes
- F17C2209/221—Welding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/032—Hydrocarbons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/032—Hydrocarbons
- F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
- F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
- F17C2223/033—Small pressure, e.g. for liquefied gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2270/00—Applications
- F17C2270/01—Applications for fluid transport or storage
- F17C2270/0102—Applications for fluid transport or storage on or in the water
- F17C2270/0105—Ships
Definitions
- the present disclosure relates to a cargo tank unit and a ship.
- Patent Document 1 discloses a configuration in which a cargo tank is supported by a hull via a cylindrical skirt. The upper end portion of the skirt described in Patent Document 1 is disposed at the equatorial position of the cargo tank. The upper end portion of this skirt is fixed by welding to the equatorial part of the cargo tank.
- Such cargo tanks are designed in accordance with the International Maritime Organization (IMO) Tank Type B requirements specified in the International Gas Carrier (IGC) Code, which is the IMO safety rules for liquefied gas ships.
- IMO International Maritime Organization
- IOC International Gas Carrier
- An IMO Tank Type B cargo tank is one in which the stress of each part of the structure is precisely grasped using, for example, a model test and a detailed analysis method, and fatigue analysis and fracture mechanism analysis are accurately performed. Accordingly, the welded portion between the cargo tank and a skirt needs to meet the same fatigue strength requirements as the tank. For this reason, a ring-shaped member formed by machining is generally used for the welded portion between the equatorial part of the cargo tank and the skirt. This ring-shaped member is joined between the upper half portion and the lower half portion of the cargo tank. The upper end of the lower half portion of the cargo tank and the upper end portion of the skirt disposed on the radially outer side of the cargo tank are welded to the lower end portion of the ring-shaped member. Accordingly, the thickness of the lower end portion of the ring-shaped member is the sum of the wall thickness of the lower half portion of the cargo tank and the wall thickness of the upper end portion of the skirt.
- the upper limit of the wall thickness of each part including the ring-shaped member is 40 mm unless the material is an aluminum alloy.
- the wall thickness of the lower half portion of the cargo tank is the thickness of the welded ring-shaped member (up to 40 mm) minus the wall thickness of the upper end portion of the skirt. In other words, at least in the lower half portion of the cargo tank, an increase in wall thickness is limited to a certain level. This hinders an increase in the size of the cargo tank required to have pressure resistance.
- the present disclosure has been made in view of the above, and an object of the present disclosure is to provide a cargo tank unit and a ship enabling an increase in the wall thickness of a cargo tank and, by extension, an increase in the size of the cargo tank.
- the cargo tank unit includes a cargo tank, a skirt, and a welded portion.
- the cargo tank is of IMO IGC Code Tank Type C.
- the skirt has an upper end connected to a lower half portion of the cargo tank over a circumferential direction.
- the skirt extends downward to be fixed to a hull.
- the welded portion fixes the upper end of the skirt to the cargo tank over the circumferential direction.
- Fig. 1 is a plan view illustrating an overall configuration of a ship according to an embodiment of the present disclosure.
- Fig. 2 is a half cross-sectional view in which a cargo tank provided on the ship is viewed from the ship stern direction.
- a ship 1 of the embodiment of the present disclosure stores and carries liquefied gas such as liquefied natural gas.
- the ship 1 includes at least a hull 2, a cargo tank 20, a skirt 30, and a welded portion 40.
- the cargo tank 20, the skirt 30, and the welded portion 40 are collectively referred to as a cargo tank unit.
- the hull 2 has a pair of broadsides 3A and 3B, a ship bottom 4, and an upper deck 5, which form the outer shell of the hull 2.
- the broadsides 3A and 3B are provided with a pair of broadside skins respectively forming the left and right broadsides.
- the ship bottom 4 is provided with a ship bottom skin connecting the broadsides 3A and 3B.
- the outer shell of the hull 2 has a U shape in a cross section orthogonal to a ship stern direction Da.
- the upper deck 5 is a whole deck exposed to the outside.
- an upper structure 7 having a living quarter is formed on the upper deck 5 on a stern 2b side.
- a cargo loading section (hold) 8 is formed closer to a bow 2a side than the upper structure 7.
- the cargo loading section 8 is recessed toward the ship bottom 4 below the upper deck 5 and is open upward.
- a plurality of the cargo tanks 20 are provided in the cargo loading section 8.
- the plurality of cargo tanks 20 are disposed side by side in the ship stern direction Da.
- An upper portion 20a of each cargo tank 20 protrudes upward beyond the upper deck 5 of the hull 2.
- the upper portions 20a of the plurality of cargo tanks 20 are covered with tank covers 25 provided on the upper deck 5.
- a heat insulating material (not illustrated) that suppresses heat input from the outside is provided on the outer surface of each of the plurality of cargo tanks 20.
- the cargo tank 20 has a spherical shape. Liquefied gas to be carried is accommodated in the cargo tank 20.
- the liquefied gas accommodated in the cargo tank 20 is, for example, a highpressure low-temperature gas of approximately 9 to 20 (BarG).
- the cargo tank 20 is an IMO Tank Type C tank specified in the IMO IGC Code.
- Each cargo tank 20 includes a lower half portion 21 and an upper half portion 22.
- the lower half portion 21 is hemispherical in the lower portion of the cargo tank 20.
- the diameter dimension of the lower half portion 21 gradually increases upward from below.
- the lower half portion 21 may, for example, have a semi-true sphere shape having a constant radius of curvature or be formed so as to have a radius of curvature increasing in stages upward from below in the cross section illustrated in Fig. 2 .
- the upper half portion 22 is provided above the lower half portion 21.
- the upper half portion 22 is hemispherical in the upper portion of the cargo tank 20.
- the diameter dimension of the upper half portion 22 gradually decreases upward from below.
- the upper half portion 22 may have a semi-true sphere shape having a constant radius of curvature or be formed so as to have a radius of curvature increasing in stages upward from below.
- the cargo tank 20 is not limited to the above shape.
- the cargo tank 20 may be configured to include a cylindrical portion (not illustrated) or the like between the upper half portion 22 and the lower half portion 21.
- Each cargo tank 20 is supported on the hull 2 by the skirt 30.
- Each cargo tank 20 has a tank structure independent of the hull 2.
- the cargo tank 20 has a liquid-tight structure and self-supports the load of the liquefied gas accommodated in the cargo tank 20.
- Fig. 3 is an enlarged cross-sectional view illustrating the configuration of the joint between the cargo tank and the skirt.
- the skirt 30 supports the cargo tank 20.
- the skirt 30 has a cylindrical shape extending in an up-down direction Dv as a whole.
- the lower end portion of the skirt 30 is fixed on a foundation deck portion 9 provided in the bottom portion of the cargo loading section 8.
- An upper end 30t of the skirt 30 is connected to an outer peripheral surface 21f of the lower half portion 21 of the cargo tank 20.
- the skirt 30 includes a tubular portion 31 and a tank support portion 32.
- the tubular portion 31 has a cylindrical shape extending in the up-down direction Dv and has a constant diameter dimension over the up-down direction Dv.
- the tubular portion 31 in this embodiment has a cylindrical shape centered on an axis a passing through the center of the cargo tank 20 in the ship width direction.
- the tank support portion 32 is provided in the upper end portion of the skirt 30.
- the tank support portion 32 is continuously provided on the upper portion of the tubular portion 31.
- the tank support portion 32 extends upward and toward the inside in a radial direction Dr.
- the tank support portion 32 extends toward the outside in the radial direction Dr and downward from a tip 32t.
- the tank support portion 32 includes a curved portion 32w that curves upward and to the inside in the radial direction Dr.
- the curved portion 32w is formed such that the angle formed by the curved portion 32w and the central axis of the tubular portion 31 gradually increases upward.
- the tip 32t of the curved portion 32w on the inside in the radial direction Dr is the upper end 30t of the skirt 30.
- the tip 32t of the curved portion 32w abuts against the outer peripheral surface 21f of the lower half portion 21 of the cargo tank 20.
- the radial direction Dr means the radial direction centered on the axis a described above.
- the circumferential direction in the following description means the circumferential direction centered on the axis a.
- a crossing angle ⁇ of the tip 32t of the curved portion 32w with respect to the outer peripheral surface of the cargo tank 20 can be, for example, approximately 30 degrees to 90 degrees.
- the crossing angle ⁇ is the angle that is formed by the innermost part of an inner surface 30f of the upper end 30t in the radial direction Dr (that is, the tip 32t) and a tangent ta1 of the outer peripheral surface 21f (circular arc shape in Fig. 3 ) of the cargo tank 20 at the position intersecting the inner surface 30f in a cross section including the axis a (see Fig. 3 ).
- the curved portion 32w is provided and the tip 32t of the inner surface 30f is also curved.
- the crossing angle ⁇ is the angle that is formed by a tangent ta2 at the tip 32t of the inner surface 30f (curved in Fig. 3 ) and the tangent ta1 on the outer peripheral surface 21f in a cross-sectional view including the axis a.
- an inner diameter D1 of the upper end 30t of the skirt 30 (the tip 32t of the curved portion 32w) is smaller than an outer diameter D2 at the equatorial part of the cargo tank 20.
- the inner diameter D1 and the outer diameter D2 are illustrated in half for convenience.
- the cargo tank 20 is supported from below by the upper end 30t of the skirt 30.
- the cargo tank 20 and the skirt 30 are joined by welding.
- the welded portion 40 is formed at the joint between the cargo tank 20 and the skirt 30.
- a high-strength welding material such as 9% Ni steel can be used as the welding material that is used in welding the cargo tank 20 and the skirt 30.
- the welded portion 40 fixes the upper end 30t of the skirt 30 to the cargo tank 20.
- the upper end 30t of the skirt 30 is continuously fixed to the outer peripheral surface 21f of the cargo tank 20 over the entire circumference in the circumferential direction.
- the welded portion 40 may be formed at a part in the circumferential direction.
- the upper end 30t of the skirt 30 is fixed to the cargo tank 20 at a part in the circumferential direction.
- the welded portion 40 may be intermittently provided in the circumferential direction of the cargo tank 20, that is, at a plurality of locations.
- a joining member 50 is provided between the outer peripheral surface 21f of the lower half portion 21 of the cargo tank 20 and the inner surface 30f of the skirt 30 facing the inside in the radial direction Dr.
- the joining member 50 is provided at a plurality of locations at intervals in the circumferential direction of the lower half portion 21 of the cargo tank 20.
- the joining member 50 exemplified in this embodiment is formed in a flat plate shape along a vertical plane orthogonal to the circumferential direction (that is, a virtual plane including the axis a).
- the joining member 50 has an inside edge portion 50a welded along the outer peripheral surface 21f of the lower half portion 21 of the cargo tank 20 on the inside in the radial direction Dr and an outside edge portion 50b welded along the inner surface 30f of the skirt 30 on the outside in the radial direction Dr. Welding may be performed on only one of the inside edge portion 50a and the outside edge portion 50b.
- a lower edge portion 50c of the joining member 50 exemplified in this embodiment is formed in a circular arc shape that is recessed upward in the central portion in radial direction Dr.
- the shape of the lower edge portion 50c is not limited to the circular arc shape in which the central portion in the radial direction Dr is recessed upward.
- the ship of the above embodiment further includes the joining member 50 provided at a plurality of locations at intervals in the circumferential direction of the lower half portion 21 of the cargo tank 20 and joining the lower half portion 21 of the cargo tank 20 and the inner surface of the skirt 30.
- the spherical lower half portion 21 and the inner surface 30f of the skirt 30 can be more firmly joined by the plurality of joining members 50 provided in the circumferential direction. As a result, it is possible to further enhance the strength with which the skirt 30 supports the cargo tank 20.
- the upper end portion of the skirt 30 extends downward and toward the outside in the radial direction Dr of the cargo tank 20.
- the upper end 30t of the skirt 30 supporting the cargo tank 20 is connected to the lower half portion 21 of the cargo tank 20.
- the upper end 30t of the skirt 30 is connected by the welded portion 40 to the outer peripheral surface 21f of the lower half portion 21 of the cargo tank 20 so as to abut from the outside in the radial direction Dr.
- the upper end 30t of the skirt 30 and the outer peripheral surface 21f of the lower half portion 21 of the cargo tank 20 are reliably welded, and the joining strength of the welded portion 40 can be effectively enhanced.
- the upper end portion of the skirt 30 has the curved portion 32w that curves upward and to the inside in the radial direction Dr, and the tip 32t of the curved portion 32w is welded to the outer peripheral surface 21f of the cargo tank 20.
- the curved portion 32w By forming the curved portion 32w in the upper end portion of the skirt 30 in this manner, the lower end of the curved portion 32w and the upper end of the tubular portion 31 can be formed smoothly and continuously. Accordingly, in the skirt 30 where the tip 32t of the curved portion 32w is welded to the outer peripheral surface 21f of the cargo tank 20, stress attributable to the load of the cargo tank 20 being locally concentrated is suppressed.
- the upper end portion of the skirt 30 may extend downward and toward the outside in the radial direction Dr of the cargo tank 20 and may have a conical tube shape as an example.
- a corner portion is formed at the joint part between the lower end of the conical tube-shaped part and the upper end of the tubular portion 31 in the upper end portion of the skirt 30. Accordingly, in a case where stress attributable to the load of the cargo tank 20 may be locally concentrated on the corner portion between the lower end of the conical tube-shaped part and the tubular portion 31, the corner portion may be reinforced or the like so that sufficient strength is ensured.
- the upper end portion of the skirt 30 in the above embodiment is provided so as to extend downward and toward the outside in the radial direction Dr of the cargo tank 20, the present disclosure is not limited thereto.
- the upper end portion of the skirt 30 may have a cylindrical shape having a constant diameter along the up-down direction Dv.
- the shape of the joining member 50 is not limited at all.
- the joining member 50 may have another shape as appropriate insofar as the joining member 50 joins the lower half portion 21 of the cargo tank 20 and the inner surface 30f of the skirt 30.
- the circumferential installation interval, count, and the like of the joining member 50 can be appropriately changed. Further, a configuration without the joining member 50 is also possible.
- the cargo tank 20 and the skirt 30 in the above embodiment are provided in the cargo loading section 8 formed in the hull 2, the present disclosure is not limited thereto.
- the cargo tank 20 and the skirt 30 may be provided on, for example, the upper deck 5.
- the ship 1 described in the embodiment is, for example, grasped as follows.
- the number of the cargo tanks 20 on the hull 2 can be reduced and the manufacturing cost of the ship 1 can be reduced.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Ship Loading And Unloading (AREA)
Abstract
Description
- The present disclosure relates to a cargo tank unit and a ship.
- The present application claims priority with respect to
Japanese Patent Application No. 2019-238408 filed in Japan on December 27, 2019 - A ship carrying liquefied gas such as natural gas is equipped with a cargo tank accommodating the liquefied gas. For example,
Patent Document 1 discloses a configuration in which a cargo tank is supported by a hull via a cylindrical skirt. The upper end portion of the skirt described inPatent Document 1 is disposed at the equatorial position of the cargo tank. The upper end portion of this skirt is fixed by welding to the equatorial part of the cargo tank. - Such cargo tanks are designed in accordance with the International Maritime Organization (IMO) Tank Type B requirements specified in the International Gas Carrier (IGC) Code, which is the IMO safety rules for liquefied gas ships.
- [PTL 1]
Japanese Patent No. 6342358 - An IMO Tank Type B cargo tank is one in which the stress of each part of the structure is precisely grasped using, for example, a model test and a detailed analysis method, and fatigue analysis and fracture mechanism analysis are accurately performed. Accordingly, the welded portion between the cargo tank and a skirt needs to meet the same fatigue strength requirements as the tank. For this reason, a ring-shaped member formed by machining is generally used for the welded portion between the equatorial part of the cargo tank and the skirt. This ring-shaped member is joined between the upper half portion and the lower half portion of the cargo tank. The upper end of the lower half portion of the cargo tank and the upper end portion of the skirt disposed on the radially outer side of the cargo tank are welded to the lower end portion of the ring-shaped member. Accordingly, the thickness of the lower end portion of the ring-shaped member is the sum of the wall thickness of the lower half portion of the cargo tank and the wall thickness of the upper end portion of the skirt.
- In the IMO Tank Type B cargo tank, the upper limit of the wall thickness of each part including the ring-shaped member is 40 mm unless the material is an aluminum alloy. The wall thickness of the lower half portion of the cargo tank is the thickness of the welded ring-shaped member (up to 40 mm) minus the wall thickness of the upper end portion of the skirt. In other words, at least in the lower half portion of the cargo tank, an increase in wall thickness is limited to a certain level. This hinders an increase in the size of the cargo tank required to have pressure resistance.
- The present disclosure has been made in view of the above, and an object of the present disclosure is to provide a cargo tank unit and a ship enabling an increase in the wall thickness of a cargo tank and, by extension, an increase in the size of the cargo tank.
- In order to achieve the above object, the cargo tank unit according to the present disclosure includes a cargo tank, a skirt, and a welded portion. The cargo tank is of IMO IGC Code Tank Type C. The skirt has an upper end connected to a lower half portion of the cargo tank over a circumferential direction. The skirt extends downward to be fixed to a hull. The welded portion fixes the upper end of the skirt to the cargo tank over the circumferential direction.
- According to the ship of the present disclosure, it is possible to increase the wall thickness of a cargo tank and, by extension, increase the size of the cargo tank.
-
-
Fig. 1 is a plan view illustrating an overall configuration of a ship according to an embodiment of the present disclosure. -
Fig. 2 is a half cross-sectional view in which a cargo tank provided on the ship according to the embodiment of the present disclosure is viewed from the ship stern direction. -
Fig. 3 is an enlarged cross-sectional view illustrating the configuration of a cargo tank-skirt joint according to the embodiment of the present disclosure. Description of Embodiments -
Fig. 1 is a plan view illustrating an overall configuration of a ship according to an embodiment of the present disclosure.Fig. 2 is a half cross-sectional view in which a cargo tank provided on the ship is viewed from the ship stern direction. - As illustrated in
Figs. 1 and2 , aship 1 of the embodiment of the present disclosure, for example, stores and carries liquefied gas such as liquefied natural gas. Theship 1 includes at least ahull 2, acargo tank 20, askirt 30, and a weldedportion 40. - For convenience, the
cargo tank 20, theskirt 30, and thewelded portion 40 are collectively referred to as a cargo tank unit. - The
hull 2 has a pair ofbroadsides ship bottom 4, and anupper deck 5, which form the outer shell of thehull 2. Thebroadsides ship bottom 4 is provided with a ship bottom skin connecting thebroadsides broadsides ship bottom 4, the outer shell of thehull 2 has a U shape in a cross section orthogonal to a ship stern direction Da. Theupper deck 5 is a whole deck exposed to the outside. In thehull 2, anupper structure 7 having a living quarter is formed on theupper deck 5 on astern 2b side. - In the
hull 2, a cargo loading section (hold) 8 is formed closer to abow 2a side than theupper structure 7. The cargo loading section 8 is recessed toward theship bottom 4 below theupper deck 5 and is open upward. - A plurality of the
cargo tanks 20 are provided in the cargo loading section 8. The plurality ofcargo tanks 20 are disposed side by side in the ship stern direction Da. Anupper portion 20a of eachcargo tank 20 protrudes upward beyond theupper deck 5 of thehull 2. Theupper portions 20a of the plurality ofcargo tanks 20 are covered withtank covers 25 provided on theupper deck 5. A heat insulating material (not illustrated) that suppresses heat input from the outside is provided on the outer surface of each of the plurality ofcargo tanks 20. - The
cargo tank 20 has a spherical shape. Liquefied gas to be carried is accommodated in thecargo tank 20. In the embodiment of the present disclosure, the liquefied gas accommodated in thecargo tank 20 is, for example, a highpressure low-temperature gas of approximately 9 to 20 (BarG). Thecargo tank 20 is an IMO Tank Type C tank specified in the IMO IGC Code. - Each
cargo tank 20 includes alower half portion 21 and anupper half portion 22. - The
lower half portion 21 is hemispherical in the lower portion of thecargo tank 20. The diameter dimension of thelower half portion 21 gradually increases upward from below. Thelower half portion 21 may, for example, have a semi-true sphere shape having a constant radius of curvature or be formed so as to have a radius of curvature increasing in stages upward from below in the cross section illustrated inFig. 2 . - The
upper half portion 22 is provided above thelower half portion 21. Theupper half portion 22 is hemispherical in the upper portion of thecargo tank 20. The diameter dimension of theupper half portion 22 gradually decreases upward from below. In the embodiment of the present disclosure, theupper half portion 22 may have a semi-true sphere shape having a constant radius of curvature or be formed so as to have a radius of curvature increasing in stages upward from below. - The
cargo tank 20 is not limited to the above shape. Thecargo tank 20 may be configured to include a cylindrical portion (not illustrated) or the like between theupper half portion 22 and thelower half portion 21. - Each
cargo tank 20 is supported on thehull 2 by theskirt 30. Eachcargo tank 20 has a tank structure independent of thehull 2. Thecargo tank 20 has a liquid-tight structure and self-supports the load of the liquefied gas accommodated in thecargo tank 20. -
Fig. 3 is an enlarged cross-sectional view illustrating the configuration of the joint between the cargo tank and the skirt. - The
skirt 30 supports thecargo tank 20. Theskirt 30 has a cylindrical shape extending in an up-down direction Dv as a whole. The lower end portion of theskirt 30 is fixed on a foundation deck portion 9 provided in the bottom portion of the cargo loading section 8. Anupper end 30t of theskirt 30 is connected to an outerperipheral surface 21f of thelower half portion 21 of thecargo tank 20. - The
skirt 30 includes atubular portion 31 and atank support portion 32. - The
tubular portion 31 has a cylindrical shape extending in the up-down direction Dv and has a constant diameter dimension over the up-down direction Dv. Thetubular portion 31 in this embodiment has a cylindrical shape centered on an axis a passing through the center of thecargo tank 20 in the ship width direction. - The
tank support portion 32 is provided in the upper end portion of theskirt 30. Thetank support portion 32 is continuously provided on the upper portion of thetubular portion 31. Thetank support portion 32 extends upward and toward the inside in a radial direction Dr. In other words, thetank support portion 32 extends toward the outside in the radial direction Dr and downward from atip 32t. In this embodiment, thetank support portion 32 includes acurved portion 32w that curves upward and to the inside in the radial direction Dr. Thecurved portion 32w is formed such that the angle formed by thecurved portion 32w and the central axis of thetubular portion 31 gradually increases upward. In this embodiment, thetip 32t of thecurved portion 32w on the inside in the radial direction Dr is theupper end 30t of theskirt 30. Thetip 32t of thecurved portion 32w abuts against the outerperipheral surface 21f of thelower half portion 21 of thecargo tank 20. Here, the radial direction Dr means the radial direction centered on the axis a described above. In addition, the circumferential direction in the following description means the circumferential direction centered on the axis a. - A crossing angle θ of the
tip 32t of thecurved portion 32w with respect to the outer peripheral surface of thecargo tank 20 can be, for example, approximately 30 degrees to 90 degrees. Here, the crossing angle θ is the angle that is formed by the innermost part of aninner surface 30f of theupper end 30t in the radial direction Dr (that is, thetip 32t) and a tangent ta1 of the outerperipheral surface 21f (circular arc shape inFig. 3 ) of thecargo tank 20 at the position intersecting theinner surface 30f in a cross section including the axis a (seeFig. 3 ). In this embodiment, thecurved portion 32w is provided and thetip 32t of theinner surface 30f is also curved. Accordingly, the crossing angle θ is the angle that is formed by a tangent ta2 at thetip 32t of theinner surface 30f (curved inFig. 3 ) and the tangent ta1 on the outerperipheral surface 21f in a cross-sectional view including the axis a. - As illustrated in
Fig. 2 , an inner diameter D1 of theupper end 30t of the skirt 30 (thetip 32t of thecurved portion 32w) is smaller than an outer diameter D2 at the equatorial part of thecargo tank 20. InFig. 2 , the inner diameter D1 and the outer diameter D2 are illustrated in half for convenience. - As a result, the
cargo tank 20 is supported from below by theupper end 30t of theskirt 30. - As illustrated in
Fig. 3 , thecargo tank 20 and theskirt 30 are joined by welding. As a result, the weldedportion 40 is formed at the joint between thecargo tank 20 and theskirt 30. A high-strength welding material such as 9% Ni steel can be used as the welding material that is used in welding thecargo tank 20 and theskirt 30. By using such a high-strength welding material, the strength of the weldedportion 40 can be enhanced, and thus the reliability of the weldedportion 40 can be improved. - The welded
portion 40 fixes theupper end 30t of theskirt 30 to thecargo tank 20. In the weldedportion 40 exemplified in this embodiment, theupper end 30t of theskirt 30 is continuously fixed to the outerperipheral surface 21f of thecargo tank 20 over the entire circumference in the circumferential direction. Although a case where the weldedportion 40 is continuously formed over the entire circumference in the circumferential direction has been described, the present disclosure is not limited to this configuration. For example, the weldedportion 40 may be formed at a part in the circumferential direction. In this case, theupper end 30t of theskirt 30 is fixed to thecargo tank 20 at a part in the circumferential direction. In this case, the weldedportion 40 may be intermittently provided in the circumferential direction of thecargo tank 20, that is, at a plurality of locations. - A joining
member 50 is provided between the outerperipheral surface 21f of thelower half portion 21 of thecargo tank 20 and theinner surface 30f of theskirt 30 facing the inside in the radial direction Dr.The joining member 50 is provided at a plurality of locations at intervals in the circumferential direction of thelower half portion 21 of thecargo tank 20. The joiningmember 50 exemplified in this embodiment is formed in a flat plate shape along a vertical plane orthogonal to the circumferential direction (that is, a virtual plane including the axis a). The joiningmember 50 has aninside edge portion 50a welded along the outerperipheral surface 21f of thelower half portion 21 of thecargo tank 20 on the inside in the radial direction Dr and anoutside edge portion 50b welded along theinner surface 30f of theskirt 30 on the outside in the radial direction Dr. Welding may be performed on only one of theinside edge portion 50a and theoutside edge portion 50b. Alower edge portion 50c of the joiningmember 50 exemplified in this embodiment is formed in a circular arc shape that is recessed upward in the central portion in radial direction Dr. The shape of thelower edge portion 50c is not limited to the circular arc shape in which the central portion in the radial direction Dr is recessed upward. - The ship of the above embodiment further includes the joining
member 50 provided at a plurality of locations at intervals in the circumferential direction of thelower half portion 21 of thecargo tank 20 and joining thelower half portion 21 of thecargo tank 20 and the inner surface of theskirt 30. - Accordingly, the spherical
lower half portion 21 and theinner surface 30f of theskirt 30 can be more firmly joined by the plurality of joiningmembers 50 provided in the circumferential direction. As a result, it is possible to further enhance the strength with which theskirt 30 supports thecargo tank 20. - In the ship of the above embodiment, the upper end portion of the
skirt 30 extends downward and toward the outside in the radial direction Dr of thecargo tank 20. Theupper end 30t of theskirt 30 supporting thecargo tank 20 is connected to thelower half portion 21 of thecargo tank 20. In addition, theupper end 30t of theskirt 30 is connected by the weldedportion 40 to the outerperipheral surface 21f of thelower half portion 21 of thecargo tank 20 so as to abut from the outside in the radial direction Dr. - Accordingly, the
upper end 30t of theskirt 30 and the outerperipheral surface 21f of thelower half portion 21 of thecargo tank 20 are reliably welded, and the joining strength of the weldedportion 40 can be effectively enhanced. - In the ship of the above embodiment, the upper end portion of the
skirt 30 has thecurved portion 32w that curves upward and to the inside in the radial direction Dr, and thetip 32t of thecurved portion 32w is welded to the outerperipheral surface 21f of thecargo tank 20. - By forming the
curved portion 32w in the upper end portion of theskirt 30 in this manner, the lower end of thecurved portion 32w and the upper end of thetubular portion 31 can be formed smoothly and continuously. Accordingly, in theskirt 30 where thetip 32t of thecurved portion 32w is welded to the outerperipheral surface 21f of thecargo tank 20, stress attributable to the load of thecargo tank 20 being locally concentrated is suppressed. - Although an embodiment of the present disclosure has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment and also includes, for example, design changes within the gist of the present disclosure.
- Although the
curved portion 32w is provided in the upper end portion of theskirt 30 in the above embodiment, the present disclosure is not limited thereto. The upper end portion of theskirt 30 may extend downward and toward the outside in the radial direction Dr of thecargo tank 20 and may have a conical tube shape as an example. In this case, a corner portion is formed at the joint part between the lower end of the conical tube-shaped part and the upper end of thetubular portion 31 in the upper end portion of theskirt 30. Accordingly, in a case where stress attributable to the load of thecargo tank 20 may be locally concentrated on the corner portion between the lower end of the conical tube-shaped part and thetubular portion 31, the corner portion may be reinforced or the like so that sufficient strength is ensured. - In addition, although the upper end portion of the
skirt 30 in the above embodiment is provided so as to extend downward and toward the outside in the radial direction Dr of thecargo tank 20, the present disclosure is not limited thereto. For example, the upper end portion of theskirt 30 may have a cylindrical shape having a constant diameter along the up-down direction Dv. - Although the joining
member 50 is provided in the above embodiment, the shape of the joiningmember 50 is not limited at all. The joiningmember 50 may have another shape as appropriate insofar as the joiningmember 50 joins thelower half portion 21 of thecargo tank 20 and theinner surface 30f of theskirt 30. In addition, the circumferential installation interval, count, and the like of the joiningmember 50 can be appropriately changed. Further, a configuration without the joiningmember 50 is also possible. - Although the
cargo tank 20 and theskirt 30 in the above embodiment are provided in the cargo loading section 8 formed in thehull 2, the present disclosure is not limited thereto. For example, thecargo tank 20 and theskirt 30 may be provided on, for example, theupper deck 5. - In addition, although the above embodiment assumes installation on the
hull 2, the present disclosure is not limited thereto. For example, providing on a floating body (not illustrated) may be performed instead. - The
ship 1 described in the embodiment is, for example, grasped as follows. -
- (1) A cargo tank unit according to a first aspect includes: a
cargo tank 20 of IMO IGC Code Tank Type C; askirt 30 having anupper end 30t connected to alower half portion 21 of thecargo tank 20 over a circumferential direction and extending downward to be fixed to ahull 2; and a weldedportion 40 fixing theupper end 30t of theskirt 30 to thecargo tank 20 over the circumferential direction.
The IMO Tank TypeC cargo tank 20 is designed based on pressure vessel standards to be capable of withstanding the temperature and pressure of the liquefied gas accommodated therein. In the IMO IGC Code Tank Type C, fatigue strength requirements are not required up to the joint with theskirt 30 as in the IMO IGC Code Tank Type B. Accordingly, thecargo tank 20 has excellent strength characteristics because it is spherical, it can be designed to be increased in wall thickness, and an increase in diameter and an increase in capacity can be achieved with strength ensured. - (2) The cargo tank unit according to a second aspect, which is the cargo tank unit of (1), further includes a joining
member 50 provided at a plurality of locations of thelower half portion 21 of thecargo tank 20 at intervals in the circumferential direction and joining thelower half portion 21 of thecargo tank 20 and aninner surface 30f of theskirt 30.
As a result, the sphericallower half portion 21 and theinner surface 30f of theskirt 30 can be more firmly joined by the plurality of joiningmembers 50 provided in the circumferential direction. As a result, it is possible to further enhance the strength with which theskirt 30 supports thecargo tank 20. - (3) In the cargo tank unit according to a third aspect, which is the cargo tank unit of (1) or (2), the
skirt 30 includes atubular portion 31 and atank support portion 32, thetubular portion 31 has a cylindrical shape extending in an up-down direction, and thetank support portion 32 is continuously provided on an upper portion of thetubular portion 31 and extends downward and outward in a radial direction Dr of thecargo tank 20.
As a result, thetank support portion 32 is connected to the outerperipheral surface 21f of thelower half portion 21 of thecargo tank 20 so as to abut from the outside in the radial direction Dr. As a result, thetank support portion 32 and the outerperipheral surface 21f of thelower half portion 21 of thecargo tank 20 are reliably welded, and the joining strength of the weldedportion 40 is effectively enhanced. - (4) In the cargo tank unit according to a fourth aspect, which is the cargo tank unit of (3), an angle formed by the
tank support portion 32 and a central axis of thetubular portion 31 is formed so as to gradually increase upward.
In this manner, corner portion formation at the joint part between thetank support portion 32 and thetubular portion 31 is suppressed. As a result, in theskirt 30 welded to the outerperipheral surface 21f of thecargo tank 20, stress attributable to the load of thecargo tank 20 being locally concentrated is suppressed. - (5) A ship according to a fifth aspect includes the cargo tank unit according to any one of (1) to (4).
- On condition that the capacity of the
cargo tank 20 is increased, the number of thecargo tanks 20 on thehull 2 can be reduced and the manufacturing cost of theship 1 can be reduced. - According to the present disclosure, it is possible to increase the wall thickness of a cargo tank and, by extension, increase the size of the cargo tank.
-
- 1: ship
- 2: hull
- 2a: bow
- 2b: stern
- 3A, 3B: broadside
- 4: ship bottom
- 5: upper deck
- 7: upper structure
- 8: cargo loading section
- 9: foundation deck portion
- 20: cargo tank
- 20a: upper portion
- 21: lower half portion
- 21f: outer peripheral surface
- 22: upper half portion
- 25: tank cover
- 30: skirt
- 30f: inner surface
- 30t: upper end
- 31: tubular portion
- 32: tank support portion
- 32t: tip
- 32w: curved portion
- 40: welded portion
- 50: joining member
- 50a: inside edge portion
- 50b: outside edge portion
- 50c: lower edge portion
- D1: inner diameter
- D2: outer diameter
- Da: ship stern direction
- Dr: radial direction
- Dv: up-down direction
- θ: crossing angle
Claims (5)
- A cargo tank unit comprising:a cargo tank of IMO IGC Code Tank Type C;a skirt having an upper end connected to a lower half portion of the cargo tank over a circumferential direction and extending downward to be fixed to a hull; anda welded portion fixing the upper end of the skirt to the cargo tank over the circumferential direction.
- The cargo tank unit according to Claim 1, further comprising joining members provided at a plurality of locations of the lower half portion of the cargo tank at intervals in the circumferential direction and joining the lower half portion of the cargo tank and an inner surface of the skirt.
- The cargo tank unit according to Claim 1 or 2, wherein
the skirt includes a tubular portion and a tank support portion,the tubular portion has a cylindrical shape extending in an up-down direction, andthe tank support portion is continuously provided on an upper portion of the tubular portion and extends downward and outward in a radial direction of the cargo tank. - The cargo tank unit according to Claim 3, wherein an angle formed by the tank support portion and a central axis of the tubular portion is formed so as to gradually increase upward.
- A ship comprising the cargo tank unit according to any one of Claims 1 to 4.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019238408A JP7527107B2 (en) | 2019-12-27 | 2019-12-27 | Cargo tank unit and ship |
PCT/JP2020/048029 WO2021132277A1 (en) | 2019-12-27 | 2020-12-22 | Cargo tank unit and ship |
Publications (3)
Publication Number | Publication Date |
---|---|
EP4056460A1 true EP4056460A1 (en) | 2022-09-14 |
EP4056460A4 EP4056460A4 (en) | 2023-01-25 |
EP4056460B1 EP4056460B1 (en) | 2024-02-14 |
Family
ID=76573281
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20906698.4A Active EP4056460B1 (en) | 2019-12-27 | 2020-12-22 | Cargo tank unit and ship |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP4056460B1 (en) |
JP (1) | JP7527107B2 (en) |
CN (1) | CN114829245B (en) |
AU (1) | AU2020413201B2 (en) |
DK (1) | DK4056460T3 (en) |
WO (1) | WO2021132277A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2023037410A (en) * | 2021-09-03 | 2023-03-15 | 川崎重工業株式会社 | Liquified hydrogen tank and design method for the same |
JP2024021723A (en) * | 2022-08-04 | 2024-02-16 | 三菱重工業株式会社 | ship |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES8609103A1 (en) * | 1981-05-26 | 1986-09-01 | Sener Ing & Sist | Tank mechanism for transporting liquefied gas |
JP2003040188A (en) * | 2001-07-27 | 2003-02-13 | Hitachi Zosen Corp | Tank support device |
WO2007142400A1 (en) | 2006-06-05 | 2007-12-13 | Hyundai Heavy Industries Co., Ltd. | Extended spherical lng storage tank and method for manufacturing the same |
JP5403900B2 (en) * | 2007-11-16 | 2014-01-29 | 三菱重工業株式会社 | Liquefied gas carrier |
EP2236841A4 (en) * | 2007-12-27 | 2016-01-27 | Kawasaki Heavy Ind Ltd | Dissimilar metal joint structure, tank skirt having the dissimilar metal joint structure, transport ship having the tank skirt, and dissimilar metal member jointing method |
JP5153416B2 (en) * | 2008-03-31 | 2013-02-27 | 三井造船株式会社 | Ship |
JP5241882B2 (en) | 2011-04-21 | 2013-07-17 | 三菱電機株式会社 | Bus bar terminal block structure |
WO2013076764A1 (en) | 2011-11-22 | 2013-05-30 | 川崎重工業株式会社 | Joint for dissimilar materials, tank-supporting member, lng carrier, and method for manufacturing joint for dissimilar materials |
GB2535397B (en) | 2014-02-28 | 2017-10-04 | Mgi Thermo Pte Ltd | An LNG fuel containment apparatus incorporating multi-layered insulation panels |
KR20160096311A (en) * | 2015-02-05 | 2016-08-16 | 에스티엑스조선해양 주식회사 | Lng fuel supplying system for imo type b fuel tank and ship with the system |
JP6358624B2 (en) * | 2015-03-26 | 2018-07-18 | 三菱造船株式会社 | Tank support structure and ship |
JP6461686B2 (en) | 2015-04-08 | 2019-01-30 | 川崎重工業株式会社 | Marine liquefied gas tank and liquefied gas carrier equipped with the same |
JP7312815B2 (en) | 2019-04-05 | 2023-07-21 | 川崎重工業株式会社 | Liquefied gas tanks and liquefied gas carriers |
-
2019
- 2019-12-27 JP JP2019238408A patent/JP7527107B2/en active Active
-
2020
- 2020-12-22 DK DK20906698.4T patent/DK4056460T3/en active
- 2020-12-22 WO PCT/JP2020/048029 patent/WO2021132277A1/en unknown
- 2020-12-22 EP EP20906698.4A patent/EP4056460B1/en active Active
- 2020-12-22 AU AU2020413201A patent/AU2020413201B2/en active Active
- 2020-12-22 CN CN202080087315.8A patent/CN114829245B/en active Active
Also Published As
Publication number | Publication date |
---|---|
AU2020413201A1 (en) | 2022-06-30 |
CN114829245A (en) | 2022-07-29 |
JP2021107171A (en) | 2021-07-29 |
JP7527107B2 (en) | 2024-08-02 |
DK4056460T3 (en) | 2024-02-26 |
CN114829245B (en) | 2024-02-09 |
EP4056460B1 (en) | 2024-02-14 |
WO2021132277A1 (en) | 2021-07-01 |
AU2020413201B2 (en) | 2024-05-02 |
EP4056460A4 (en) | 2023-01-25 |
KR20220098236A (en) | 2022-07-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP4056460A1 (en) | Cargo tank unit and ship | |
JP5403900B2 (en) | Liquefied gas carrier | |
KR102010422B1 (en) | Liquefied gas tank for ship and liquefied gas carrier having same | |
KR20200112971A (en) | Ship | |
JP6139957B2 (en) | Sphere support structure for liquefied gas carrier | |
FI64095B (en) | ANORDNING VID FARTYG FOER TRANSPORT AV NEDKYLD GAS I FLYTANDE FORM | |
KR102700217B1 (en) | Cargo tank units and ships | |
KR101897727B1 (en) | Hull support structure for liquefied gas tank, and liquefied gas carrier vessel | |
JP6358624B2 (en) | Tank support structure and ship | |
JP6423970B2 (en) | Marine liquefied gas tank and liquefied gas carrier equipped with the same | |
WO2024029564A1 (en) | Ship | |
JP6721545B2 (en) | Ship | |
JP2019015377A (en) | Liquefied gas tank structure, ship, and floating structure | |
KR102280713B1 (en) | Tank cover for ships and ships equipped therewith | |
JP6654605B2 (en) | Ship | |
WO2023234285A1 (en) | Marine vessel | |
CN117916151A (en) | Storage tank and ship | |
JP2019014439A (en) | Ship |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20220610 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
A4 | Supplementary search report drawn up and despatched |
Effective date: 20230102 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: F17C 13/08 20060101ALI20221220BHEP Ipc: B63B 25/16 20060101AFI20221220BHEP |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
INTG | Intention to grant announced |
Effective date: 20230911 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
P01 | Opt-out of the competence of the unified patent court (upc) registered |
Effective date: 20231205 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REG | Reference to a national code |
Ref country code: DK Ref legal event code: T3 Effective date: 20240223 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 602020025870 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG9D |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: MP Effective date: 20240214 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20240614 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20240214 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20240515 |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: MK05 Ref document number: 1656845 Country of ref document: AT Kind code of ref document: T Effective date: 20240214 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20240514 Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20240214 Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20240214 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20240214 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20240214 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20240514 Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20240214 Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20240214 Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20240614 Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20240214 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20240515 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20240214 Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20240214 Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20240214 Ref country code: AT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20240214 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20240214 Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20240614 |