WO2024062620A1 - 多重殻タンク - Google Patents

多重殻タンク Download PDF

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Publication number
WO2024062620A1
WO2024062620A1 PCT/JP2022/035477 JP2022035477W WO2024062620A1 WO 2024062620 A1 WO2024062620 A1 WO 2024062620A1 JP 2022035477 W JP2022035477 W JP 2022035477W WO 2024062620 A1 WO2024062620 A1 WO 2024062620A1
Authority
WO
WIPO (PCT)
Prior art keywords
tank
partition wall
opening
ventilation
space
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.)
Ceased
Application number
PCT/JP2022/035477
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
太一郎 下田
祐介 清水
晴彦 冨永
和宏 黒田
邦彦 持田
森 田中
隆道 細野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kawasaki Heavy Industries Ltd
Kawasaki Motors Ltd
Original Assignee
Kawasaki Heavy Industries Ltd
Kawasaki Jukogyo KK
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 Kawasaki Heavy Industries Ltd, Kawasaki Jukogyo KK filed Critical Kawasaki Heavy Industries Ltd
Priority to KR1020257009526A priority Critical patent/KR20250053915A/ko
Priority to JP2024548051A priority patent/JPWO2024062620A1/ja
Priority to PCT/JP2022/035477 priority patent/WO2024062620A1/ja
Priority to CN202280097177.0A priority patent/CN119404045A/zh
Publication of WO2024062620A1 publication Critical patent/WO2024062620A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • F17C13/08—Mounting arrangements for vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C3/00—Vessels not under pressure
    • F17C3/02—Vessels not under pressure with provision for thermal insulation
    • F17C3/04—Vessels not under pressure with provision for thermal insulation by insulating layers
    • 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
    • F17C2205/01—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
    • 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
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG

Definitions

  • the present disclosure relates to a multi-shell tank including at least two inner and outer tanks.
  • multi-shell tanks are known that include an inner tank and an outer tank surrounding the inner tank.
  • Multi-shell tanks are used, for example, to store low-temperature liquefied gases.
  • one in which an inner tank is supported by a cylindrical member called a skirt is known.
  • Patent Document 1 discloses this type of multi-shell tank.
  • a manhole for work is provided in a portion of the skirt located substantially vertically in the center between the inner tank and the outer tank.
  • a gas other than air is filled between the inner tank and the outer tank (that is, between the inner and outer tanks).
  • the existing gas between the inner and outer tanks is purged using a piston flow method that utilizes the difference in specific gravity of the gas.
  • a purge gas having a lower density than the existing gas between the inner and outer tanks is supplied from the upper part between the inner and outer tanks, and the existing gas is discharged from the lower part between the inner and outer tanks.
  • purge gas having a higher density than the existing gas between the inner and outer tanks is supplied from the lower part between the inner and outer tanks, and the existing gas is discharged from the upper part between the inner and outer tanks.
  • the gas can pass through the skirt between the inner and outer tanks through a manhole formed in the skirt.
  • the existing gas contained in the recess cannot be pushed out by the purge gas, so the existing gas remains in the recess.
  • the narrow recess between the inner and outer tanks is, for example, a joint (or intersection) between the inner tank or the outer tank and the skirt.
  • the present disclosure has been made in view of the above circumstances, and its purpose is to provide an inner tank, an outer tank, and a partition (for example, a support)
  • An object of the present invention is to propose a structure for suppressing gas retention in the vicinity of a joint between a partition wall and an outer tank or an inner tank in a multi-shell tank equipped with a skirt.
  • a multi-shell tank Inner tank and an outer tank surrounding the inner tank; a partition wall connected to one of the inner tank and the outer tank, disposed between the inner tank and the outer tank, and separating the tanks into a first space and a second space;
  • the partition wall has a ventilation portion that allows ventilation between the first space and the second space,
  • the ventilation section includes a first opening located in a boundary area along the boundary between the partition wall and the tank and opening into the first space, and a second opening located in the boundary area and opening into the second space. It has an opening.
  • a multi-shell tank that includes an inner tank, an outer tank, and a partition wall that is joined to the inner tank and the outer tank and partitions between the inner tank and the outer tank, the partition wall and the outer tank or the inner tank are connected to each other. It is possible to provide a structure that suppresses gas retention in the vicinity of the joint.
  • FIG. 1 is a sectional view showing a schematic configuration of a multi-shell tank according to a first embodiment of the present disclosure.
  • FIG. 2 is a partially enlarged sectional view of the multi-shell tank of FIG. 1.
  • FIG. 3 is a partially exploded view of the bulkhead of the multi-shell tank.
  • FIG. 4 is a partially exploded view of the partition wall illustrating the arrangement of ventilation portions and traffic holes.
  • FIG. 5 is a sectional view showing a schematic configuration of a multi-shell tank provided with piping.
  • FIG. 6 is a cross-sectional view of a multi-shell tank illustrating how purge gas is supplied from the top between the inner and outer tanks to discharge existing gas between the inner and outer tanks.
  • FIG. 1 is a sectional view showing a schematic configuration of a multi-shell tank according to a first embodiment of the present disclosure.
  • FIG. 2 is a partially enlarged sectional view of the multi-shell tank of FIG. 1.
  • FIG. 3 is a partially exploded view of the
  • FIG. 7 is a cross-sectional view of a multi-shell tank illustrating how purge gas is supplied from the bottom between the inner and outer tanks to discharge existing gas between the inner and outer tanks.
  • FIG. 8 is a partially exploded view of a partition wall of a multi-shell tank according to Modification 1 of the first embodiment.
  • FIG. 9 is a partially exploded view of a partition wall of a multi-shell tank according to Modification 2 of the first embodiment.
  • FIG. 10 is a partially enlarged cross-sectional view of a multi-shell tank according to a third modified example of the first embodiment.
  • FIG. 11 is a sectional view showing a schematic configuration of a multi-shell tank according to a second embodiment of the present disclosure.
  • FIG. 12 is a partially enlarged sectional view of the multi-shell tank of FIG. 11.
  • FIG. 13 is a partially enlarged sectional view of a multi-shell tank according to Modification 1 of the second embodiment.
  • FIG. 14 is a cross-sectional view showing a schematic configuration of a multi-shell tank according to a third embodiment.
  • FIG. 15 is a partially enlarged sectional view of the multi-shell tank according to the third embodiment.
  • FIG. 16 is an enlarged cross-sectional view of a portion of a multi-shell tank according to a third embodiment.
  • FIG. 1 is a sectional view showing a schematic configuration of a multi-shell tank 1 according to a first embodiment of the present disclosure.
  • a multi-shell tank 1 shown in FIG. 1 is a container that stores low-temperature liquefied gas such as LNG or liquefied hydrogen.
  • the multi-shell tank 1 includes an inner tank 11 and an outer tank 12 surrounding the inner tank 11.
  • the inner tank 11 and the outer tank 12 are separated from each other, and a cold insulation layer is formed between the inner tank 11 and the outer tank 12 (that is, the space between the inner and outer tanks 13).
  • the shape of the inner tank 11 is not limited, but may be, for example, a spherical shape, a vertically stretched spherical shape, a rectangular shape, or a capsule shape having hemispherical upper and lower parts and a cylindrical body.
  • the shape of the outer tank 12 is not limited, but may be similar to the inner tank 11 or may have a different shape from the inner tank 11.
  • the inner tank 11 is supported on the base 3 via the skirt 2.
  • the skirt 2 has a cylindrical shape centered on an axis extending in the vertical direction. Note that the vertical direction is not limited to a strictly vertical direction, and may be inclined from the vertical direction. If the multi-shell tank 1 is installed on a ship, the base 3 may be the ship's hull. Also, if the multi-shell tank 1 is installed on land, the base 3 may be a concrete foundation.
  • the skirt 2 according to this embodiment is erected on the seat 3 and is joined to the inner tank 11 and the outer tank 12. However, the skirt 2 is arranged between the inner and outer tanks 13, the inner tank 11 is supported by the outer tank 12 via the skirt 2, and the outer tank 12 is supported by the seat 3 via a support member such as a block or another skirt. may have been done.
  • FIG. 2 is a partially enlarged sectional view of the multi-shell tank 1
  • FIG. 3 is a partially developed view of the partition wall 20 of the multi-shell tank 1.
  • the skirt 2 includes a first skirt member 2a disposed between the inner and outer tanks 13, a second skirt member 2b disposed outside the outer tank 12, and a first skirt member 2a. and a connecting member 2c that connects the second skirt member 2b in the vertical direction.
  • a ring-shaped connecting member 111 is disposed halfway up and down the inner tank 11, and the upper end of the first skirt member 2a is joined to this connecting member 111.
  • An outer tank 12 is joined to the connecting member 2c, and the skirt 2 and the outer tank 12 intersect at the connecting member 2c.
  • the connecting member 2c serves both as a component of the skirt 2 and as a component of the outer tank 12.
  • the first skirt member 2a of the skirt 2 is a support member that supports the inner tank 11, and also serves as a partition wall 20 that partitions the inner and outer tanks 13.
  • the partition wall 20 separates the inner and outer tank space 13 into a first space 16 and a second space 17 .
  • the boundary B1 between the outer tank 12 and the partition wall 20 is defined at the joint between the connecting member 2c, which is one of the components of the outer tank 12, and the partition wall 20.
  • the skirt 2 may be a vertically continuous cylindrical member, and the intersection of the outer tank 12 and the skirt 2 may be defined as the boundary B1 between the outer tank 12 and the partition wall 20.
  • the boundary B2 between the inner tank 11 and the partition wall 20 is defined at the joint between the connecting member 111, which is one of the components of the inner tank 11, and the partition wall 20.
  • a boundary B2 between the inner tank 11 and the partition wall 20 is continuous in the circumferential direction along the outer surface of the inner tank 11.
  • a narrow portion 28 sandwiched between the partition wall 20 and the outer tank 12 is formed near the boundary B1 between the partition wall 20 and the outer tank 12.
  • at least one ventilation portion 25 is provided in the boundary area A1 of the partition wall 20.
  • a plurality of ventilation portions 25 are provided in the boundary area A1 of the partition wall 20 so as to be distributed in the circumferential direction.
  • the "boundary area A1" is an area continuous in the circumferential direction along the boundary B1 between the partition wall 20 and the outer tank 12, and is an area near the boundary B1 between the partition wall 20 and the outer tank 12.
  • Boundary area A1 may include boundary B1.
  • the ventilation section 25 arranged in the boundary area A1 of the partition wall 20 may be referred to as a lower ventilation section 25b.
  • the ventilation section 25 has a first opening 18 that opens into the first space 16 and a second opening 19 that opens into the second space 17. In other words, the first opening 18 opens into the first space 16 and the second opening 19 opens into the second space 17.
  • the ventilation section 25 has a passage that connects the first opening 18 and the second opening 19, and the first space 16 and the second space 17 are communicated with each other through the ventilation section 25.
  • the first opening 18 is arranged in the boundary area A1 of the partition wall 20 in the first space 16.
  • the second opening 19 is arranged in the boundary area A1 of the partition wall 20 in the second space 17. In other words, the second opening 19 is arranged in the narrow portion 28 .
  • the boundary area A1 of the partition wall 20 may range upward from the boundary B1 between the partition wall 20 and the outer tank 12 to 1/6 of the height of the partition wall 20.
  • the boundary area A1 of the partition wall 20 may range upward from the boundary B1 between the partition wall 20 and the outer tank 12 to 1/10 of the height of the partition wall 20.
  • the boundary area A1 of the partition wall 20 may range up to 500 mm upward from the lower edge B1 of the partition wall 20.
  • the ventilation section 25 is a ventilation hole 250 that penetrates the partition wall 20 in its thickness direction.
  • the shape and size of the ventilation hole 250 as the ventilation portion 25 are not particularly limited, but may be a circular, rectangular, or polygonal hole with a diameter of about several tens to hundreds of mm.
  • the vent hole 250 having such a size has a sufficient opening area to serve the purpose of ventilation.
  • the lowest part 25a of the ventilation hole 250 as the ventilation portion 25 (that is, the lowest point of the opening edge forming the ventilation hole 250) may be located in the boundary area A1 of the partition wall 20.
  • the first opening 18 and the second opening 19 are provided along the boundary B1 between the partition wall 20 and the outer tank 12, avoiding the weld bead between the partition wall 20 and the outer tank 12.
  • the lowest part 25a of the ventilation hole 250 is located directly above the weld bead at the boundary B1 between the partition wall 20 and the outer tank 12, avoiding the weld bead, and is located substantially at the lowest part of the partition wall 20. Thereby, retention of gas in the narrow portion 28 can be effectively suppressed.
  • the partition wall 20 may be provided with a communication hole 26.
  • the communication hole 26 is a hole or opening that penetrates the partition wall 20 from the inside to the outside, and allows a worker to access the partition wall 20 from the inside to the outside or vice versa.
  • the communication hole 26 is preferably provided above the ventilation hole 250 in the partition wall 20 and outside the boundary area A1.
  • the traffic hole 26 is a hole for people to pass through, and requires a larger opening area than the ventilation hole 250. Therefore, the strength of the portion of the partition wall 20 where the traffic hole 26 is provided may be lower than that of other portions. Therefore, in the partition wall 20, the communication hole 26 is desirably arranged above the ventilation hole 250 and close to the center of the partition wall 20 in the vertical direction.
  • the bulkhead 20 may be provided with a step 41 for accessing the access hole 26. Furthermore, as shown in FIG. 4, in the partition wall 20, the ventilation hole 250 and the communication hole 26 are arranged apart in the lateral direction (that is, in the direction in which the boundary B1 between the partition wall 20 and the outer tank 12 continues). If so, it is desirable that they be arranged so that their lateral positions do not overlap.
  • the ventilation hole 250 as the ventilation section 25 may also have the function of a passage for piping and/or wiring.
  • the multi-shell tank 1 may be equipped with piping or wiring that is passed through the vent holes 250.
  • the piping 14 is passed between the inner and outer tanks 13, passes through the ventilation hole 250 provided in the partition wall 20, and extends to the inside (or outside) of the partition wall 20. will be laid down.
  • the size of the ventilation hole 250 may be appropriately increased depending on the size of the piping/wiring.
  • FIG. 6 is a cross-sectional view of the multi-shell tank 1 illustrating how the purge gas 31 is supplied from the top of the space between the inner and outer tanks 13 and the existing gas 32 between the inner and outer tanks 13 is discharged.
  • a purge gas 31 having a specific gravity smaller than the existing gas 32 is supplied from the top of the space between the outer and outer tanks 13, and a purge gas 31 having a specific gravity smaller than that of the existing gas 32 is supplied from the bottom of the space between the outer and outer tanks 13.
  • FIG. 7 is a sectional view of the multi-shell tank 1 illustrating how the purge gas 31 is supplied from the bottom of the space between the inner and outer tanks 13 and the existing gas 32 between the inner and outer tanks 13 is discharged. As shown in FIG.
  • a purge gas 31 having a higher specific gravity than the existing gas 32 is supplied from the bottom of the space between the outer and outer tanks 13, and a purge gas 31 having a specific gravity higher than that of the existing gas 32 is supplied from the top of the space between the outer and outer tanks 13.
  • the existing gas 32 between the inner and outer tanks 13 is pushed out to the outside by the piston flow formed by the purge gas 31.
  • the existing gas 32 in the narrow part 28 generated at the junction of the partition wall 20 and the outer tank 12 is pushed out by the flow of purge gas 31 moving from the inside of the partition wall 20 to the outside through the vent hole 250. Retention of gas 32 does not occur.
  • FIG. 8 is a partially exploded view of the partition wall 20 of the multi-shell tank 1 according to Modification 1 of the first embodiment.
  • the partition wall 20 has a communication hole 26 that is continuous with a ventilation hole 250.
  • a vent hole 250 is formed by a portion of the opening edge of the communication hole 26 protruding downward to the boundary area A1 of the partition wall 20.
  • FIG. 9 is a partially exploded view of the partition wall 20 of the multi-shell tank 1 according to the second modification of the first embodiment.
  • one opening functions as the ventilation hole 250 and the communication hole 26, similar to the above-mentioned modification 1.
  • the communication hole 26 provided in the partition wall 20 has a lowermost portion located in the boundary area A1 of the partition wall 20, and this communication hole 26 functions as the ventilation section 25 when the space between the inner and outer tanks 13 is ventilated.
  • the ventilation section 25 is the lower ventilation section 25b arranged in the boundary area A1 along the boundary B1 between the partition wall 20 and the outer tank 12; It may be arranged in a boundary area A2 along a boundary B2 between the inner tank 20 and the inner tank 11. Further, the partition wall 20 of the multi-shell tank 1 may be provided with ventilation portions 25 in both the boundary area A1 and the boundary area A2.
  • the "boundary area A2" is an area continuous in the circumferential direction along the boundary B2 between the partition wall 20 and the inner tank 11, and is an area near the boundary B2 between the partition wall 20 and the inner tank 11.
  • the boundary area A2 may include the boundary B2 of the inner tank 11.
  • FIG. 10 is a partially enlarged sectional view of the multi-shell tank 1 according to Modification 3 of the first embodiment.
  • a narrow portion 28 sandwiched between the inner wall of the partition wall 20 and the outer wall of the inner tank 11 is formed near the boundary B2 between the partition wall 20 and the inner tank 11.
  • at least one ventilation portion 25 is provided in the boundary area A2 of the partition wall 20.
  • the ventilation section 25 arranged in the boundary area A2 of the partition wall 20 may be referred to as an upper ventilation section 25u.
  • the boundary area A2 of the partition wall 20 is a range of 1/6 of the height of the partition wall 20 downward from the boundary B2 between the partition wall 20 and the inner tank 11. good.
  • the boundary area A2 of the partition wall 20 may range downward from the boundary B2 between the partition wall 20 and the inner tank 11 to 1/10 of the height of the partition wall 20.
  • the boundary area A2 of the partition wall 20 may range up to 500 mm downward from the boundary B2 between the partition wall 20 and the inner tank 11.
  • the first opening 18 and the second opening 19 are provided along the boundary B2 between the partition wall 20 and the inner tank 11, avoiding the weld bead. In this case, the first opening 18 and the second opening 19 may be arranged directly below the weld bead of the partition wall 20, avoiding the weld bead.
  • the upper ventilation portion 25u is a ventilation hole 250 that penetrates the boundary area A2 of the partition wall 20 in its thickness direction.
  • the ventilation hole 250 has a first opening 18 that opens into the first space 16, a second opening 19 that opens into the second space 17, and a passage that communicates the first opening 18 and the second opening 19.
  • the upper ventilation portion 25u may be the ventilation hole 250 of the mode shown in the above-mentioned modification 1 or modification 2.
  • the purge gas 31 having a higher specific gravity than the existing gas 32 is supplied from the bottom of the space between the inner and outer tanks 13 and the existing gas 32 between the inner and outer tanks 13 is discharged, the narrow The existing gas 32 in the section 28 flows from the first space 16 to the second space 17 through the upper ventilation section 25u. In this way, it is possible to prevent the existing gas 32 from stagnation in the narrow portion 28.
  • FIG. 11 is a sectional view showing a schematic configuration of a multi-shell tank 1A according to a second embodiment of the present disclosure
  • FIG. 12 is a partially enlarged sectional view of the multi-shell tank 1A of FIG. 11.
  • the same reference numerals are attached to the drawings to the same or similar members as in the above-described embodiment, and the description thereof will be omitted.
  • the multi-shell tank 1A has at least one ventilation portion 25 ( A lower ventilation section 25b) is provided. Further, a traffic hole 26 through which a person can pass is provided in the vertical center of the partition wall 20.
  • the ventilation section 25 in this embodiment is composed of a ventilation pipe 251 having a first opening 18 opening into the first space 16, a second opening 19 opening into the second space 17, and a passage connecting the first opening 18 and the second opening 19.
  • the first opening 18 is arranged at one end of the ventilation pipe 251, and the second opening 19 is arranged at the other end of the ventilation pipe 251.
  • the first opening 18 is arranged at the lower end of the partition wall 20 in the first space 16 or in its vicinity.
  • the second opening 19 is arranged at the lower end of the partition wall 20 in the second space 17 or in its vicinity. In other words, the second opening 19 is arranged in the narrow section 28.
  • the ventilation pipe 251 extends upward from the lower end of the partition wall 20 in the first space 16, passes through the communication hole 26, bends at the communication hole 26, extends downward, and reaches the lower end of the partition wall 20 in the second space 17.
  • the ventilation pipe 251 may be composed of a bent pipe, such as a U-shaped pipe.
  • the ventilation pipe 251 passes through the communication hole 26, there is no need to provide a dedicated opening for the ventilation section 25 in the partition wall 20.
  • the partition wall 20 may have a hole for passing the ventilation pipe 251 above the lower end.
  • the purge gas 31 having a specific gravity smaller than the existing gas 32 is supplied from the top of the space between the inner and outer tanks 13, there is a pressure between the first opening 18 and the second opening 19 of the vent pipe 251. Due to the difference, gas flows through the vent pipe 251 and the existing gas 32 is discharged from the narrowed portion 28. In this way, a forced gas flow also occurs in the narrow portion 28, and it is possible to prevent the existing gas 32 from stagnation in the narrow portion 28.
  • the ventilation part 25 is the lower ventilation part 25b arranged in the boundary area A1 of the partition wall 20, but the ventilation part 25 is arranged in the boundary area A2 of the partition wall 20. It's okay. Further, the partition wall 20 of the multi-shell tank 1A may include ventilation portions 25 in both the boundary area A1 and the boundary area A2.
  • FIG. 13 is a partially enlarged sectional view of a multi-shell tank 1A according to Modification 1 of the second embodiment.
  • a narrow portion 28 sandwiched between the partition wall 20 and the inner tank 11 is formed near a boundary B2 between the partition wall 20 and the inner tank 11.
  • at least one ventilation portion 25 is provided in the boundary area A2 of the partition wall 20.
  • the upper ventilation section 25u has a first opening 18 opening into the first space 16, a second opening 19 opening into the second space 17, and the first opening 18 and the second opening 19. It is composed of a ventilation pipe 251 having a communicating passage.
  • the first opening 18 is arranged at one end of the ventilation pipe 251, and the second opening 19 is arranged at the other end of the ventilation pipe 251.
  • the first opening 18 is arranged at or near the upper end of the partition wall 20 in the first space 16 .
  • the second opening 19 is arranged at or near the upper end of the partition wall 20 in the second space 17 . That is, the first opening 18 is arranged in the narrow portion 28.
  • the ventilation pipe 251 extends downward from the upper end of the partition wall 20 in the first space 16 , passes through the communication hole 26 , bends at the communication hole 26 , extends upward, and reaches the upper end of the partition wall 20 in the second space 17 .
  • the ventilation pipe 251 may be configured with a bent pipe such as a U-shaped pipe, for example.
  • the existing gas 32 between the inner and outer tanks 13 is discharged by supplying the purge gas 31 having a higher specific gravity than the existing gas 32 from the bottom of the space between the inner and outer tanks 13, A pressure difference is generated between the first opening 18 and the second opening 19 of the trachea 251, and gas flows through the ventilation pipe 251. In this way, the existing gas 32 flows from the narrow portion 28 to the second space 17, and it is possible to prevent the existing gas 32 from staying in the narrow portion 28.
  • FIG. 14 is a sectional view showing a schematic configuration of a multi-shell tank 1B according to a third embodiment of the present disclosure.
  • the same reference numerals are attached to the drawings to the same or similar members as in the above-described embodiment, and the description thereof will be omitted.
  • a rib 36 is provided on the outer wall of the inner tank 11 between the inner and outer tanks 13.
  • the ribs 36 may also function as a support member for a heat insulating material disposed on the outer wall of the inner tank 11.
  • the rib 36 is joined to the outer wall of the inner tank 11 and extends from the inner tank 11 toward the outer tank 12, but the tip edge of the rib 36 is spaced apart from the inner wall of the outer tank 12.
  • the ribs 36 are continuous in the circumferential direction on the outer wall of the inner tank 11, and the ribs 36 separate the inner and outer tanks 13 into a first space 16 and a second space 17.
  • the rib 36 serves as a partition wall 20 that separates the inner and outer tank space 13 into the first space 16 and the second space 17. Note that the first space 16 and the second space 17 are communicated between the tip edge of the rib 36 and the outer tank 12.
  • a ventilation portion 25 is provided in the boundary area A3 of the rib 36.
  • the "boundary area A3" is an area continuous in the circumferential direction along the boundary B3 between the rib 36 and the inner tank 11, and is an area near the boundary B3 between the rib 36 and the inner tank 11.
  • Boundary area A3 may include boundary B3.
  • the boundary area A3 of the rib 36 is the height of the rib 36 from the boundary B3 between the rib 36 and the inner tank 11 (that is, from the boundary B3 to the rib 36).
  • the boundary area A3 of the rib 36 may range from the boundary B3 between the rib 36 and the inner tank 11 to 1/10 of the height of the rib 36.
  • the ventilation portion 25 provided in the rib 36 has a first opening 18 that opens into the first space 16 and a second opening 19 that opens into the second space 17.
  • the ventilation portion 25 is disposed away from the boundary B3 between the rib 36 and the inner tank 11 toward the tip of the rib 36 by the welded joint between the inner tank 11 and the rib 36.
  • the ribs 36 extending in the vertical direction are not limited to those extending strictly in the vertical direction, and it is desirable that the ventilation portion 25 is widely applied to ribs whose stretching direction has a component in the vertical direction.
  • a rib 37 is provided on the inner wall of the outer tank 12 between the inner and outer tanks 13.
  • the ribs 37 may also function as a supporting member for a heat insulating material disposed on the inner wall of the outer tank 12.
  • the rib 37 is joined to the inner wall of the outer tank 12, and the rib 37 extends from the outer tank 12 toward the inner tank 11, but the tip edge of the rib 37 is spaced apart from the outer wall of the inner tank 11.
  • the ribs 37 are continuous in the circumferential direction on the inner wall of the outer tank 12, and the ribs 37 separate the inner and outer tanks 13 into a first space 16 and a second space 17.
  • the rib 37 serves as a partition wall 20 that separates the inner and outer tank space 13 into the first space 16 and the second space 17. Note that the first space 16 and the second space 17 are communicated between the tip edge of the rib 37 and the inner tank 11.
  • a ventilation section 25 is provided in the boundary area A4 of the rib 37.
  • the "boundary area A4" is an area continuous in the circumferential direction along the boundary B4 between the rib 37 and the outer tank 12, and is an area near the boundary B4 between the rib 37 and the outer tank 12.
  • Boundary area A4 may include boundary B4.
  • the boundary area A4 of the rib 37 is the height of the rib 37 from the boundary B4 between the rib 37 and the outer tank 12 (that is, from the boundary B4 to the rib 37).
  • the boundary area A4 of the rib 37 may range from the boundary B4 between the rib 37 and the outer tank 12 to 1/10 of the height of the rib 37.
  • the ventilation section 25 provided in the rib 37 has a first opening 18 that opens into the first space 16 and a second opening 19 that opens into the second space 17.
  • the ventilation portion 25 is disposed away from the boundary B4 between the rib 37 and the outer tank 12 toward the tip of the rib 37 by the welded joint between the outer tank 12 and the rib 37.
  • the ribs 37 extending in the vertical direction are not limited to those extending strictly in the vertical direction, and it is desirable that the ventilation portion 25 is widely applied to ribs 37 whose stretching direction has a component in the vertical direction.
  • the ribs 36 and 37 may be provided with passage holes for people to pass through.
  • the ventilation section 25 may be configured using a traffic hole as in the second embodiment described above.
  • the multi-shell tanks 1, 1A, 1B are Inner tank 11 and an outer tank 12 surrounding the inner tank 11; A partition wall connected to one of the inner tank 11 and the outer tank 12, disposed between the inner tank 11 and the outer tank 12, and separating the tank space 13 into a first space 16 and a second space 17.
  • the partition wall 20 has a ventilation portion 25 that connects the first space 16 and the second space 17 in a ventilable manner,
  • the ventilation part 25 is arranged in the boundary area A1-A4 along the boundary B1-B4 between the partition wall 20 and the tanks 11 and 12, and has a first opening 18 that opens into the first space 16, and is arranged in the boundary area A1-A4. It has a second opening 19 which opens into the second space 17.
  • the partition wall 20 is joined to the inner tank 11 and the outer tank 12, and the ventilation part 25 A first ventilation section 25u having a first opening 18 and a second opening 19 arranged in a boundary area A2 between the inner tank 11 and the partition wall 20, and a first ventilation part 25u arranged in a boundary area A1 between the outer tank 12 and the partition wall 20. It includes at least one of the second ventilation section 25b having the opening 18 and the second opening 19.
  • the existing gas 32 between the inner and outer tanks 13 is pushed out by the purge gas 31 using a piston flow method, and the existing gas 32 is discharged from the inner and outer tanks 13.
  • the existing gas 32 it is possible to eliminate or prevent the existing gas 32 from stagnation in corners where gas tends to stagnate, such as the narrow portion 28 that occurs at the junction between the partition wall 20 and the inner tank 11 and/or outer tank 12.
  • This makes it possible to realize efficient gas purging.
  • no additional device for example, a blower, etc.
  • maintainability and reliability can be improved, and it can also contribute to cost reduction.
  • the ventilation section 25 is constituted by a hole (vent hole 250) that penetrates the partition wall 20 in the thickness direction.
  • the partition wall 20 has a traffic hole 26 through which a person placed away from the boundary area A can pass.
  • the communication hole 26 and the ventilation part 25 are located at the boundary B1 between the partition wall 20 and the tanks 11 and 12 in the partition wall 20. - They are separated in the continuous direction of B4.
  • the traffic hole 26 and the ventilation hole 250 as the ventilation portion 25 are separated in the lateral direction (that is, circumferential direction) in the partition wall 20. It is desirable that As described above, since the communication holes 26 and the ventilation holes 250 are shifted in the circumferential direction in the partition wall 20, the openings are arranged in a dispersed manner in the circumferential direction, and a decrease in the strength of the partition wall 20 is suppressed. Efficient ventilation takes place.
  • the ventilation section 25 is constituted by a hole 250 that penetrates the partition wall 20 in the thickness direction,
  • the partition wall 20 has a communication hole 26 that is continuous with the ventilation section 25 and allows people to pass through.
  • the multi-shell tank 1 according to the sixth item of the present disclosure is the multi-shell tank 1 according to any one of the first to fifth items, further including piping 14 or wiring passed through the ventilation section 25.
  • the ventilation hole 250 as a piping hole or a wiring hole, the number of man-hours for separately providing a piping hole or a wiring hole can be reduced.
  • the multi-shell tank 1A according to the seventh item of the present disclosure is the multi-shell tank 1A according to the first or second item, in which the partition wall 20 has a communication hole 26 through which a person can pass, and the ventilation part 25 has a It has a first end in which the first opening 18 is disposed, and a second end in which the second opening 19 is disposed, and is constituted by a pipe (for example, a ventilation pipe 251) passed through the communication hole 26. It is something.
  • the degree of freedom in the position where the ventilation section 25 passes through the partition wall 20 increases. Further, by using the communication hole 26 as an insertion hole for the ventilation pipe 251, the number of openings provided in the partition wall 20 can be reduced.
  • the multi-shell tanks 1, 1A, 1B according to the eighth item of the present disclosure are the multi-shell tanks 1, 1A, 1B according to any one of the first to seventh items, in which the first opening 18 and the second opening 19 are , located within a range of 1/6 of the height of the partition wall 20 from the boundary B1-B4 between the partition wall 20 and the tanks 11 and 12.
  • the ventilation section 25 having the first opening 18 and the second opening 19 arranged in such a boundary area A1-A4, the narrow part 28 formed at the boundary B1-B4 between the tanks 11, 12 and the partition wall 20 Gas retention can be effectively suppressed.
  • the multi-shell tank 1, 1A according to the ninth item of the present disclosure is the multi-shell tank 1, 1A according to any one of the first to seventh items, in which the partition 20 is cylindrical with the axial direction extending vertically and is a support member (i.e., skirt 2) that supports the inner tank 11.
  • the partition 20 is cylindrical with the axial direction extending vertically and is a support member (i.e., skirt 2) that supports the inner tank 11.
  • partition wall 20 is suitable as the structure of the skirt 2 of the multi-shell tank 1, 1A.
  • the partition wall 20 is not limited to the skirt 2, and may be any wall that partitions the space between the inner and outer tanks 13 so as to restrict the flow of gas.
  • the first opening 18 and the second opening 19 are arranged apart from the boundary B1-B4 between the tanks 11, 12 and the partition wall 20 via the joint between the tanks 11, 12 and the partition wall 20.
  • first opening 18 and the second opening 19 be placed closer to the boundary B1-B4 in the partition wall 20.
  • the multi-shell tanks 1, 1A, and 1B according to the present embodiment have a double shell of an inner tank 11 and an outer tank 12, but triple or more tanks are provided inside the inner tank 11 or outside the outer tank 12. It may have multiple shells.
  • the multi-shell tanks 1, 1A, and 1B may be cargo handling tanks or fuel tanks.
  • the inner tank 11 is supported by the skirt 2 and the structure is partitioned into the space 13 between the inner and outer tanks.
  • a ventilation portion 25 may be provided in the support structure or the reinforcement member in order to perform gas purging.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
PCT/JP2022/035477 2022-09-22 2022-09-22 多重殻タンク Ceased WO2024062620A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1020257009526A KR20250053915A (ko) 2022-09-22 2022-09-22 다중각 탱크
JP2024548051A JPWO2024062620A1 (https=) 2022-09-22 2022-09-22
PCT/JP2022/035477 WO2024062620A1 (ja) 2022-09-22 2022-09-22 多重殻タンク
CN202280097177.0A CN119404045A (zh) 2022-09-22 2022-09-22 多层壳罐

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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JP (1) JPWO2024062620A1 (https=)
KR (1) KR20250053915A (https=)
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4921707A (https=) * 1972-06-23 1974-02-26
JPH1182896A (ja) * 1997-09-16 1999-03-26 I H I Plantec:Kk 竪型断熱低温タンク及びその施工方法
JP2001153298A (ja) * 1999-11-29 2001-06-08 Hiroshima Gas Kk 竪型断熱低温タンクの外槽支持構造

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4921707A (https=) * 1972-06-23 1974-02-26
JPH1182896A (ja) * 1997-09-16 1999-03-26 I H I Plantec:Kk 竪型断熱低温タンク及びその施工方法
JP2001153298A (ja) * 1999-11-29 2001-06-08 Hiroshima Gas Kk 竪型断熱低温タンクの外槽支持構造

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JPWO2024062620A1 (https=) 2024-03-28
KR20250053915A (ko) 2025-04-22

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