WO2022145383A1 - 極低温液体用配管構造およびこれを備えた船舶 - Google Patents
極低温液体用配管構造およびこれを備えた船舶 Download PDFInfo
- Publication number
- WO2022145383A1 WO2022145383A1 PCT/JP2021/048299 JP2021048299W WO2022145383A1 WO 2022145383 A1 WO2022145383 A1 WO 2022145383A1 JP 2021048299 W JP2021048299 W JP 2021048299W WO 2022145383 A1 WO2022145383 A1 WO 2022145383A1
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- WO
- WIPO (PCT)
- Prior art keywords
- low temperature
- pipe
- ultra
- piping structure
- support member
- Prior art date
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 43
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 31
- 239000010959 steel Substances 0.000 claims abstract description 31
- 238000009835 boiling Methods 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims description 39
- 239000001257 hydrogen Substances 0.000 description 80
- 229910052739 hydrogen Inorganic materials 0.000 description 80
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 65
- 150000002431 hydrogen Chemical class 0.000 description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless 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
- B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
- B63B27/24—Arrangement of ship-based loading or unloading equipment for cargo or passengers of pipe-lines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
- B63B27/30—Arrangement of ship-based loading or unloading equipment for transfer at sea between ships or between ships and off-shore structures
- B63B27/34—Arrangement of ship-based loading or unloading equipment for transfer at sea between ships or between ships and off-shore structures using pipe-lines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/02—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets partly surrounding the pipes, cables or protective tubing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/08—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing
- F16L3/10—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing divided, i.e. with two or more members engaging the pipe, cable or protective tubing
- F16L3/1091—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing divided, i.e. with two or more members engaging the pipe, cable or protective tubing with two members, the two members being fixed to each other with fastening members on each side
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/24—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets with a special member for attachment to profiled girders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/06—Arrangements using an air layer or vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/004—Details of vessels or of the filling or discharging of vessels for large storage vessels not under pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
- B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
- B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
- B63B2025/087—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid comprising self-contained tanks installed in the ship structure as separate units
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B2231/00—Material used for some parts or elements, or for particular purposes
- B63B2231/02—Metallic materials
- B63B2231/04—Irons, steels or ferrous alloys
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/18—Double-walled pipes; Multi-channel pipes or pipe assemblies
-
- 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
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
Definitions
- the present disclosure relates to a piping structure applied to a ship that stores an ultra-low temperature liquid having a boiling point of -196 ° C or lower at normal pressure.
- Patent Document 1 is known as a pipe for flowing an ultra-low temperature liquid as described above.
- the pipe of Patent Document 1 is a pipe (double pipe) having a double structure for flowing liquefied hydrogen having a boiling point of -253 ° C at normal pressure, and is arranged concentrically. It has a pipe and an outer pipe. A vacuum layer for blocking heat transfer is formed between the inner pipe and the outer pipe. Due to the heat insulating action of this vacuum layer, the liquefied hydrogen inside the inner tube is maintained at a temperature below its boiling point.
- the material When the temperature of the outer tube drops to a temperature at which liquefied air is formed, the material is attached to other members in contact with the temperature drop, which is the part where the temperature drop occurs, due to the temperature drop. It becomes brittle. Low temperature embrittlement may occur. Further, when the liquefied air generated in the temperature lowering portion reaches another member through the surface of the outer pipe or the like, the other member is significantly cooled by the liquefied air, which may cause low temperature embrittlement. There is sex.
- the present disclosure has been made in view of the above circumstances, and is a piping structure for ultra-low temperature liquid that can suppress embrittlement of other members due to a decrease in temperature of the piping through which the ultra-low temperature liquid flows, and a piping structure for ultra-low temperature liquid.
- the purpose is to provide a equipped vessel.
- the ultra-low temperature liquid piping structure is a piping structure applied to a ship that stores an ultra-low temperature liquid having a boiling point of -196 ° C or lower at normal pressure.
- the support member comprises a low-temperature pipe through which the ultra-low temperature liquid flows and a support member that supports the low-temperature pipe and is in contact with the low-temperature pipe at a position upward away from the structural material of the ship. It is made of low temperature steel, which is unlikely to be brittle at low temperature.
- the ship according to another aspect of the present disclosure is a ship that stores an ultra-low temperature liquid having a boiling point of -196 ° C. or lower at normal pressure, and includes a tank that stores the ultra-low temperature liquid and a tank cover that covers the tank.
- the deck is provided with the above-mentioned ultra-low temperature liquid piping structure, and the structural material is the tank cover or the deck.
- the ship 1 shown in this figure is a liquefied hydrogen carrier that stores and transports liquefied hydrogen L (FIG. 2), and includes a hull 2 and two tanks 3 mounted on the hull 2.
- the number of tanks 3 may be three or more, or one.
- the liquefied hydrogen L carried by the ship 1 of the present embodiment is hydrogen in a liquid phase state cooled to a temperature below the boiling point of -253 ° C. at normal pressure, and is the ultra-low temperature liquid in the present disclosure. This is an example.
- the hull 2 has two freight trains 5 opened upward in the area corresponding to each tank 3.
- a partition wall 6 for partitioning the two cargo compartments 5 is formed between the adjacent cargo compartments 5.
- the cargo number 5 may be three or more, or may be one.
- Hull 2 also has a deck 7 around the cargo hold 5.
- the deck 7 includes a forecastle 7a located in front of the cargo hold 5, a pair of side decks 7b and 7c located on the left and right sides of the cargo hold 5, and a stern deck 7d located behind the cargo hold 5.
- Each tank 3 is a cylindrical tank that is long in the captain direction of the ship 1, and is housed in the cargo hold 5.
- Each tank 3 has an inner tank 3a in which liquefied hydrogen L is stored inside, and an outer tank 3b concentrically arranged outside the inner tank 3a.
- a vacuum layer 3c for heat insulation is formed between the inner tank 3a and the outer tank 3b.
- the vacuum layer 3c is a closed space that can communicate with the suction means (not shown).
- a tank cover 4 is arranged above each tank 3. Each tank cover 4 cooperates with the cargo hold 5 to form a storage space S for the tank 3.
- the hull 2 is made of steel.
- the decks 7a to 7d and the tank cover 4 are each made of general structural mild steel.
- the type of structural mild steel is not particularly limited, but as an example, SS material (general structural rolled steel material) specified in JIS standards may be used.
- a hydrogen pipe 10 is arranged on the upper surface of the tank cover 4.
- the hydrogen pipe 10 is a pipe used when at least the liquefied hydrogen L in the tank 3 is loaded and unloaded from the ship 1, and is arranged so as to extend along the upper surface of the tank cover 4 while being appropriately curved.
- the hydrogen pipe 10 corresponds to an example of the low temperature pipe in the present disclosure.
- the tank cover 4 located below the hydrogen pipe 10 corresponds to an example of the structural material of a ship in the present disclosure.
- FIG. 3 is a cross-sectional perspective view showing the structure of the hydrogen pipe 10.
- the hydrogen pipe 10 has an inner pipe 10a through which liquefied hydrogen L can flow inside, and an outer pipe 10b concentrically arranged outside the inner pipe 10a.
- a vacuum layer 10c for heat insulation is formed between the inner pipe 10a and the outer pipe 10b.
- the vacuum layer 10c is a closed space that can communicate with the suction means (not shown).
- At least the inner pipe 10a of the hydrogen pipe 10 is made of low-temperature steel having a property of being hard to become brittle even under extremely low temperature conditions.
- the material of the outer pipe 10b does not necessarily have to be low temperature steel, but the outer pipe 10b in the present embodiment is made of the same low temperature steel as the inner pipe 10a.
- FIGS. 5 and 6 are side views and sectional views showing a structure for supporting the hydrogen pipe 10 on the tank cover 4.
- the hydrogen pipe 10 is arranged at a position separated from the tank cover 4 by a predetermined distance, and is supported by the tank cover 4 via the base rack 20 and a plurality of support members 30.
- the liquefied hydrogen L is shown inside the inner pipe 10a.
- the direction parallel to the axis of the hydrogen pipe 10 is referred to as the pipe axis direction X
- the direction orthogonal to the pipe axis direction X and the vertical direction (vertical direction) is referred to as the pipe axis orthogonal direction Y.
- the base rack 20 includes a plurality of pillar members 21 and an upper frame 22 supported by each pillar member 21.
- Each of the plurality of pillar members 21 is a columnar member extending upward from the tank cover 4, and is fixed to the upper surface of the tank cover 4 at a plurality of locations separated (dispersed) in the pipe axis direction X and the pipe axis orthogonal direction Y.
- the upper frame 22 is composed of a plurality of frame materials fixed to the upper end portion of each pillar member 21 in a state of being combined in a grid shape in a plan view.
- the upper frame 22 has a plurality of vertical frame members 22a extending in the pipe axis direction X, and a plurality of horizontal frame members 22b connecting each vertical frame member 22a in the pipe axis orthogonal direction Y.
- Each vertical frame material 22a is arranged so as to bridge the upper ends of the pillar members 21 arranged in the pipe axis direction X
- each horizontal frame material 22b is arranged between the upper ends of the pillar members 21 arranged in the pipe axis orthogonal direction Y. It is arranged so as to cross over.
- the plurality of support members 30 are arranged so as to be lined up in the pipe axis direction X on the upper side of the base rack 20.
- Each support member 30 has a seat portion 31, a pair of leg portions 32, and a fixture 33.
- the seat portion 31 is a plate-shaped member extending in the direction Y orthogonal to the pipe axis, and is arranged directly below the hydrogen pipe 10.
- the hydrogen pipe 10 is fixed to the upper surface of the seat portion 31 by the fixing tool 33.
- the seat portion 31 is in contact with the lower surface of the outer pipe 10b of the hydrogen pipe 10 and directly supports the hydrogen pipe 10.
- a lubricating member or a low friction member may be arranged between the outer pipe 10b and the seat portion 31 to allow relative movement between the outer pipe 10b and the seat portion 31 due to heat shrinkage or the like.
- Fixture 33 is a fastening member, a so-called U bolt, formed in an inverted U shape when viewed from the front.
- the fixture 33 has an upper portion 33a extending in the direction perpendicular to the pipe axis Y, and a pair of side portions 33b extending downward from both ends of the upper portion 33a.
- the pair of side portions 33b are fastened to the seat portion 31 from above at positions on both the left and right sides of the hydrogen pipe 10.
- the hydrogen pipe 10 is sandwiched between the upper portion 33a and the seat portion 31, and the hydrogen pipe 10 is fixed to the support member 30.
- the pair of leg portions 32 are formed so as to extend downward from both left and right ends of the seat portion 31, that is, both ends of the seat portion 31 in the direction perpendicular to the tube axis.
- the lower ends of the legs 32 are fixed to the upper frame 22 of the base rack 20. Specifically, the lower ends of the legs 32 are fixed to the vertical frame members 22a of the upper frame 22 by welding or the like.
- a drip tray 40 extending in the pipe axis direction X is arranged between the hydrogen pipe 10 and the base rack 20.
- the drip tray 40 is a relatively shallow dish-shaped member, and has a flat plate-shaped bottom portion 41 long in the pipe axis direction X and a pair of rising portions 42 rising upward from both ends in the pipe axis orthogonal direction Y in the bottom portion 41.
- the width dimension which is the dimension of the drip tray 40 in the direction perpendicular to the pipe axis, is set to be equal to or larger than the diameter of the hydrogen pipe 10. Further, the width dimension of the drip tray 40 is smaller than the distance between the pair of legs 32 in the support member 30, specifically, the distance from the inner surface of one leg 32 to the inner surface of the other leg 32.
- the length dimension which is the dimension of the drip tray 40 in the pipe axis direction X, is set to be substantially the same as the total length of the hydrogen pipe 10. That is, the drip tray 40 is arranged so as to extend over substantially the entire length of the hydrogen pipe 10.
- Such a long drip tray 40 can be constructed, for example, by connecting a plurality of trays divided in the pipe axis direction X.
- the drip tray 40 is supported by the base rack 20 via a plurality of tray support members 50 (see FIGS. 4 and 6) arranged in the pipe axis direction X.
- the tray support member 50 has a seat portion 51 and a pair of leg portions 52.
- the seat portion 51 is a plate-shaped member extending in the direction Y orthogonal to the pipe axis, and is arranged directly below the drip tray 40.
- the drip tray 40 is fixed to the upper surface of the seat portion 51 by welding or the like.
- the seat 51 contacts the lower surface of the drip tray 40 and directly supports the drip tray 40.
- the drip tray 40 is arranged so as to extend in the pipe axial direction X through between the pair of legs 32 in the support member 30 for the hydrogen pipe 10.
- the seat portion 51 is attached at a height substantially intermediate between the lower surface of the hydrogen pipe 10 and the upper surface of the base rack 20 so that the drip tray 40 is arranged downward with respect to the hydrogen pipe 10 at a distance. There is.
- the pair of legs 52 are formed so as to extend downward from both left and right ends of the seat 51, that is, both ends of the seat 51 in the direction perpendicular to the tube axis.
- the lower ends of the legs 52 are fixed to the upper frame 22 of the base rack 20. Specifically, the lower ends of the legs 52 are fixed to the vertical frame material 22a of the upper frame 22 by welding or the like.
- the support member 30 for the hydrogen pipe 10 further includes an auxiliary support member 35 for supporting the drip tray 40.
- the auxiliary support member 35 is a member extending in the pipe axis orthogonal direction Y at a height position directly below the drip tray 40, and is attached so as to connect the pair of leg portions 32 in the support member 30 to each other in the pipe axis orthogonal direction Y. ing. It can be said that the support member 30 provided with such an auxiliary support member 35 has a function of supporting the hydrogen pipe 10 and a function of supporting the drip tray 40.
- the support member 30, the drip tray 40, and the tray support member 50 are made of low-temperature steel having a property of being hard to become brittle even under extremely low temperature conditions.
- the seat portion 31, the leg portion 32, the fixture 33, and the auxiliary support member 35 constituting the support member 30, the seat portion 51 and the leg portion 52 constituting the tray support member 50, and the drip tray 40, respectively, are used.
- It can be made of austenitic stainless steel, which is a kind of low temperature steel.
- austenitic stainless steel low carbon stainless steel such as SUS304L or SUS316L specified in JIS standard is particularly suitable.
- each part of the base rack 20, that is, the pillar member 21 and the upper frame 22, is made of a steel material other than the low temperature steel, for example, a general structural mild steel similar to the material of the tank cover 4.
- the base rack 20 and the tank cover 4 are made of a steel material in which low-temperature embrittlement, which is embrittled under extremely low temperature conditions, is more likely to occur than low-temperature steel.
- the hydrogen pipe 10 for flowing the liquefied hydrogen L is supported by the tank cover 4 via the support member 30 made of low temperature steel, and drip below the hydrogen pipe 10. Since the tray 40 is arranged, there is an advantage that it is possible to suppress the brittleness of other members due to the influence of the temperature drop of the hydrogen pipe 10.
- the hydrogen pipe 10 has a double structure including an inner pipe 10a and an outer pipe 10b, and a vacuum layer 10c is formed between the inner pipes 10a and 10b, so that the degree of vacuum of the vacuum layer 10c is sufficient. Even if the liquefied hydrogen L flows inside the inner pipe 10a, the temperature of the outer pipe 10b is maintained at a value sufficiently higher than the temperature of the inner pipe 10a. However, the degree of vacuum of the vacuum layer 10c may decrease due to the long-term operation of the ship 1, and when such a decrease in the degree of vacuum occurs, heat transfer between the inner pipe 10a and the outer pipe 10b occurs. It is promoted and the temperature difference between the outer tube 10b and the inner tube 10a is reduced.
- the temperature of the outer tube 10b drops to a temperature close to the temperature of the liquefied hydrogen inside the inner tube 10a.
- the hydrogen pipe 10 generally has a structure in which a plurality of unit pipes having a finite length in the pipe axis direction X are connected, the degree of vacuum does not uniformly decrease in the total length of the hydrogen pipe 10. That is, it is considered that the degree of decrease in the degree of vacuum differs depending on the position of the tube axis direction X or the unit tube. Therefore, even if the temperature of the outer pipe 10b drops to a temperature close to that of the liquefied hydrogen L, such a phenomenon usually occurs only in a part of the hydrogen pipe 10. For these reasons, in the following, a part of the hydrogen pipe 10 whose surface temperature (temperature of the outer pipe 10b) has dropped to a temperature close to that of the liquefied hydrogen L is particularly referred to as a temperature drop portion. And.
- the temperature of the outer pipe 10b drops to a temperature close to that of the liquefied hydrogen L. Therefore, if the support member 30 is provided in such a temperature drop portion, the temperature drop portion is used.
- the support member 30 is significantly cooled by heat transfer. In particular, among the support members 30, the seat portion 31 and the fixture 33 that come into contact with the hydrogen pipe 10 are remarkably cooled. Further, in the temperature drop portion of the hydrogen pipe 10, nitrogen and oxygen in the air may be condensed on the surface of the outer pipe 10b to form liquefied air containing liquefied nitrogen or liquefied oxygen, and such liquefaction may occur.
- the support member 30 is also significantly cooled when air reaches the support member 30 through the surface of the outer tube 10b.
- the material of the support member 30 is a general structural mild steel similar to that of the tank cover 4, the support member 30 becomes brittle due to low temperature embrittlement, and the hydrogen pipe 10 is not properly supported.
- the material of the support member 30 is a low temperature steel that is hard to be embrittled even under extremely low temperature conditions. Therefore, even if the support member 30 is remarkably cooled as described above, the support member 30 is not easily embrittled. The low temperature embrittlement can be sufficiently suppressed, and the support strength of the hydrogen pipe 10 by the support member 30 can be maintained satisfactorily.
- the drip tray 40 is arranged below the hydrogen pipe 10, even if the liquefied air formed in the temperature drop portion of the hydrogen pipe 10 is dropped from the hydrogen pipe 10 as described above.
- the dropped liquefied air can be received by the drip tray 40, and the received liquefied air can be rapidly evaporated depending on the temperature of the drip tray 40.
- the drip tray 40 is formed so as to extend along the pipe axis direction X of the hydrogen pipe 10, a large temperature drop occurs at a plurality of points of the hydrogen pipe 10 separated from the pipe axis direction X. Even so, the liquefied air generated in each temperature drop portion can be accurately received by the drip tray 40.
- the drip tray 40 since the drip tray 40 is arranged so as to extend in the pipe axis direction X through between the pair of legs 32 in the support member 30, the drip tray 40 interferes with the support member 30.
- the drip tray 40 can be arranged at an appropriate position below the hydrogen pipe 10 while avoiding the above. As a result, it is possible to achieve both the appropriate support of the hydrogen pipe 10 by the support member 30 and the accurate reception of the liquefied air by the drip tray 40.
- the drip tray 40 is supported by the tray support member 50, and the drip tray 40 and the tray support member 50 are each made of low temperature steel, so that the hydrogen pipe 10 is liquefied into the drip tray 40. It is possible to suppress low temperature brittleness of the drip tray 40 and the tray support member 50 that may occur when air is dropped.
- a base rack 20 made of general structural mild steel similar to the tank cover 4 is constructed on the tank cover 4, and a support member is provided on the upper side of the upper frame 22 of the base rack 20. Since the 30 and the tray support member 50 are attached, the ratio of the low temperature steel occupied in the various members for supporting the pipe is reduced while sufficiently increasing the vertical distance between the hydrogen pipe 10 and the tank cover 4. Can be reduced. As a result, it is possible to further reduce the possibility that the liquefied air dropped from the hydrogen pipe 10 reaches the tank cover 4 with a rational structure without a significant cost increase.
- the tray support member 50 that supports the drip tray 40 is mounted on the upper frame 22 of the base rack 20, but instead, the drip tray 40 is supported by the hydrogen pipe 10 itself in FIG. 7.
- the drip tray 40 is supported by the inverted U-shaped support member 70 attached to the hydrogen pipe 10.
- the support member 70 includes a fixing portion 71 fixed to the upper surface of the hydrogen pipe 10, a pair of extending portions 72 extending downward from the left and right ends of the fixing portion 71, and a pair of extending portions 72 extending inward from the lower end of each extending portion 72. It is provided with a support portion 73.
- the drip tray 40 is fixed to the support member 70 by means such as welding while being placed on the upper surface of each support portion 73.
- the drip tray 40 is arranged so as to extend over substantially the entire length of the hydrogen pipe 10, but it is known in advance where the temperature of the hydrogen pipe 10 is likely to decrease or the degree of vacuum is likely to decrease. In such a case, a drip tray may be provided in such a place in a limited manner.
- the drip tray 40 a square dish having a bottom portion 41 and a pair of rising portions 42 is used, but in the drip tray in the present disclosure, liquefied air is formed on the surface of the hydrogen pipe 10.
- the drip trays having various shapes can be used as long as they have a shape capable of receiving the dripping of the liquefied air.
- a simple flat plate-shaped member may be used as the drip tray.
- low temperature steel is used as the material of the drip tray 40, but when the heat insulating material, gravel, etc. are used together with the drip tray, that is, when the heat insulating material, gravel, etc. are laid on the upper surface of the drip tray,
- the material of the drip tray can be a steel material other than the low temperature steel.
- the hydrogen pipe 10 is arranged above the tank cover 4 in the ship 1
- the hydrogen pipe may be arranged not only above the tank cover 4 but also above the deck 7. , It can also be arranged in a room such as a cargo equipment room.
- the same support structure as in the above embodiment can be applied to the hydrogen pipes arranged at a place other than above the tank cover 4 in this way.
- the hydrogen pipe 10 a double-structured pipe having an inner pipe 10a and an outer pipe 10b and having a vacuum layer 10c formed between them is adopted, but a non-double pipe without a vacuum layer is adopted.
- the structural piping as a low temperature piping.
- a pipe provided with a main pipe made of low-temperature steel and a heat insulating layer such as a urethane layer formed on the outer surface thereof can be used as the low-temperature pipe.
- the piping structure of the present disclosure is applied to a ship 1 that stores and transports liquefied hydrogen L having a boiling point of -253 ° C. at normal pressure
- the vessel may be any as long as it stores an ultra-low temperature liquid having a boiling point of -196 ° C. or lower at normal pressure
- the piping structure of the present disclosure can be applied to various vessels as long as it is used.
- the piping structure of the present disclosure can be similarly applied to a ship that stores liquefied helium having a boiling point of -269 ° C at normal pressure and liquefied nitrogen having a boiling point of -196 ° C at normal pressure. Is.
- the piping structure for ultra-low temperature liquid is a piping structure applied to a ship that stores an ultra-low temperature liquid having a boiling point of -196 ° C or lower at normal pressure, and the ultra-low temperature liquid is circulated.
- the low-temperature pipe is provided with a support member that supports the low-temperature pipe and is in contact with the low-temperature pipe at a position upward away from the structural material of the ship. It is configured.
- the surface temperature of at least a part of the low temperature pipe through which the extremely low temperature liquid having a boiling point of -196 ° C or less at normal pressure flows may drop to a temperature close to that of the extremely low temperature liquid. If a support member is provided in the temperature drop portion, which is a portion where such a significant temperature drop occurs, the support member can be significantly cooled by heat transfer from the temperature drop portion. Further, in the temperature lowering portion, nitrogen and oxygen in the air may be condensed on the surface thereof, and liquefied air containing liquefied nitrogen, liquefied oxygen and the like may be formed. Even when such liquefied air reaches the support member through the surface of the pipe, the support member can be significantly cooled.
- the support member may become brittle due to low temperature embrittlement and the low temperature pipe may not be properly supported.
- the material of the support member is low-temperature steel that is unlikely to cause low-temperature embrittlement, even if the support member is significantly cooled as described above, the support member is sufficiently low-temperature embrittlement. It is possible to maintain good support strength of the low temperature pipe by the support member.
- the liquefied air is directly described.
- the possibility of reaching the structural material is reduced.
- the liquefied air dropped from the low-temperature piping may adhere to the support member and evaporate, or may adhere to some piping component other than the support member and evaporate.
- the possibility that the liquefied air reaches the structural material is reduced, so that it is possible to prevent the structural material from being significantly cooled and embrittled.
- the piping structure further includes a drip tray arranged below the low temperature pipe so that when liquefied air is formed on the surface of the low temperature pipe, dripping of the liquefied air can be received.
- the liquefied air dropped from the low temperature pipe can be accurately received and evaporated by the drip tray. Thereby, it is possible to prevent the liquefied air from reaching the structural material with a sufficiently high probability, and it is possible to appropriately protect the structural material from low temperature embrittlement.
- the drip tray has a shape extending along the pipe axis direction of the low temperature pipe.
- the support member is provided with a seat portion that contacts the lower surface of the low temperature pipe to support the low temperature pipe, a fixture that fixes the low temperature pipe to the seat portion, and the seat portion. It comprises at least a pair of legs extending downward, and the drip tray is arranged so as to extend in the direction of the pipe axis through between the pair of legs.
- the drip tray can be arranged at an appropriate position below the low temperature pipe while avoiding the drip tray from interfering with the support member. As a result, it is possible to achieve both appropriate support of the low temperature pipe by the support member and accurate reception of the liquefied air by the drip tray.
- the piping structure further includes a tray support member for supporting the drip tray below the low temperature pipe, and the drip tray and the tray support member are made of low temperature steel which is less likely to cause low temperature embrittlement. ..
- the piping structure further includes a base rack fixed to the upper surface of the structural material and made of a steel material which is more prone to low temperature embrittlement than the low temperature steel. It has a plurality of pillar members extending upward from the structural member and an upper frame fixed to the upper end of each pillar member, and the support member and the tray support member are attached to the upper side of the upper frame.
- the vertical distance between the low temperature pipe and the structural material of the ship is provided. It is possible to reduce the proportion of low-temperature steel occupied in various members for supporting pipes while sufficiently expanding. As a result, it is possible to further reduce the possibility that the liquefied air dropped from the low temperature pipe reaches the structural material with a rational structure without a significant increase in cost.
- the support member may include a fixing portion fixed to the low temperature pipe and a support portion for supporting the drip tray.
- the drip tray can be properly attached below the low temperature piping.
- the ship according to another aspect of the present disclosure is a ship that stores an ultra-low temperature liquid having a boiling point of -196 ° C. or lower at normal pressure, and includes a tank that stores the ultra-low temperature liquid and a tank cover that covers the tank.
- the deck is provided with the above-mentioned ultra-low temperature liquid piping structure, and the structural material is the tank cover or the deck.
- the tank cover or deck can be protected from low temperature embrittlement while appropriately supporting the low temperature piping above the tank cover or deck.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Supports For Pipes And Cables (AREA)
Abstract
Description
Claims (8)
- 常圧での沸点が-196℃以下の極低温液体を貯留する船舶に適用される配管構造であって、
前記極低温液体が流通する低温配管と、
前記船舶の構造材から上方に離れた位置に前記低温配管を支持しかつ当該低温配管に接触する支持部材とを備え、
前記支持部材は、低温脆化が起こり難い低温用鋼により構成されている、極低温液体用配管構造。 - 請求項1に記載の極低温液体用配管構造において、
前記低温配管の表面に液化空気が形成された場合に当該液化空気の滴下を受け止め可能なように前記低温配管の下方に配置されるドリップトレイをさらに備えた、極低温液体用配管構造。 - 請求項2に記載の極低温液体用配管構造において、
前記ドリップトレイは、前記低温配管の管軸方向に沿って延びる形状を有する、極低温液体用配管構造。 - 請求項3に記載の極低温液体用配管構造において、
前記支持部材は、前記低温配管の下面に接触して当該低温配管を支持する座部と、当該座部に前記低温配管を固定する固定具と、前記座部から下方に延びる少なくとも一対の脚部とを備え、
前記ドリップトレイは、前記一対の脚部の間を通って前記管軸方向に延びるように配設されている、極低温液体用配管構造。 - 請求項2~4のいずれか1項に記載の極低温液体用配管構造において、
前記低温配管の下方に前記ドリップトレイを支持するトレイ支持部材をさらに備え、
前記ドリップトレイおよび前記トレイ支持部材は、低温脆化が起こり難い低温用鋼により構成されている、極低温液体用配管構造。 - 請求項5に記載の極低温液体用配管構造において、
前記構造材の上面に固定され、かつ前記低温用鋼よりも低温脆化が起こり易い鋼材により構成されたベースラックをさらに備え、
前記ベースラックは、前記構造材から上方に延びる複数の柱部材と、各柱部材の上端部に固定された上段フレームとを有し、
前記支持部材および前記トレイ支持部材は、前記上段フレームの上側に取り付けられている、極低温液体用配管構造。 - 請求項2に記載の極低温液体用配管構造において、
前記支持部材は、前記低温配管に固定される固定部と、前記ドリップトレイを支持する支持部とを備える、極低温液体用配管構造。 - 常圧での沸点が-196℃以下の極低温液体を貯留する船舶であって、
前記極低温液体を貯留するタンクと、
前記タンクを覆うタンクカバーと、
甲板と、
請求項1~7のいずれか1項に記載の極低温液体用配管構造とを備え、
前記構造材は、前記タンクカバーもしくは前記甲板である、船舶。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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EP21915243.6A EP4249363A4 (en) | 2020-12-28 | 2021-12-24 | CRYOGENIC FLUID LINE STRUCTURE AND WATERCRAFT EQUIPPED THEREWITH |
CN202180086886.4A CN116670024A (zh) | 2020-12-28 | 2021-12-24 | 极低温液体用配管结构及具备该结构的船舶 |
KR1020237020821A KR20230107683A (ko) | 2020-12-28 | 2021-12-24 | 극저온 액체용 배관 구조 및 이것을 구비한 선박 |
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JP2020218651A JP2022103799A (ja) | 2020-12-28 | 2020-12-28 | 極低温液体用配管構造およびこれを備えた船舶 |
JP2020-218651 | 2020-12-28 |
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JP (1) | JP2022103799A (ja) |
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JP2004190759A (ja) * | 2002-12-10 | 2004-07-08 | Osaka Gas Co Ltd | 低温配管の支持構造 |
JP2015004382A (ja) * | 2013-06-19 | 2015-01-08 | 川崎重工業株式会社 | 二重殻タンクおよび液化ガス運搬船 |
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JP2019503940A (ja) * | 2015-12-30 | 2019-02-14 | ヒュンダイ ヘビー インダストリーズ カンパニー リミテッド | 液化ガス運搬船 |
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US3671315A (en) * | 1970-04-28 | 1972-06-20 | Exxon Research Engineering Co | Thermal transition design for vessels carrying liquid cargoes at nonambient temperatures |
KR101359516B1 (ko) * | 2012-02-03 | 2014-02-07 | 삼성중공업 주식회사 | 액화물 이송 파이프의 누출액으로부터 선체를 보호하는 구조체와 이를 포함하는 선박 |
EP3032161A1 (en) * | 2014-12-12 | 2016-06-15 | Shell Internationale Research Maatschappij B.V. | Containment system for liquified gases |
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2020
- 2020-12-28 JP JP2020218651A patent/JP2022103799A/ja active Pending
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2021
- 2021-12-24 CN CN202180086886.4A patent/CN116670024A/zh active Pending
- 2021-12-24 KR KR1020237020821A patent/KR20230107683A/ko unknown
- 2021-12-24 WO PCT/JP2021/048299 patent/WO2022145383A1/ja active Application Filing
- 2021-12-24 EP EP21915243.6A patent/EP4249363A4/en active Pending
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JPH1082494A (ja) * | 1996-09-09 | 1998-03-31 | Ishikawajima Harima Heavy Ind Co Ltd | 低温液化ガス配管の液受装置 |
JP2004190759A (ja) * | 2002-12-10 | 2004-07-08 | Osaka Gas Co Ltd | 低温配管の支持構造 |
JP2015004382A (ja) * | 2013-06-19 | 2015-01-08 | 川崎重工業株式会社 | 二重殻タンクおよび液化ガス運搬船 |
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JP2022103799A (ja) | 2022-07-08 |
EP4249363A1 (en) | 2023-09-27 |
EP4249363A4 (en) | 2024-05-08 |
CN116670024A (zh) | 2023-08-29 |
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