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
• • 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
  • B63B73/20—Building or assembling prefabricated vessel modules or parts other than hull blocks, e.g. engine rooms, rudders, propellers, superstructures, berths, holds or tanks
• • 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
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
  • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
  • F17C13/00—Details of vessels or of the filling or discharging of vessels
  • F17C13/004—Details of vessels or of the filling or discharging of vessels for large storage vessels not under pressure
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
  • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
  • F17C3/00—Vessels not under pressure
  • F17C3/02—Vessels not under pressure with provision for thermal insulation
  • F17C3/025—Bulk storage in barges or on ships
  • F17C3/027—Wallpanels for so-called membrane tanks
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
  • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
  • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
  • F17C2201/01—Shape
  • F17C2201/0147—Shape complex
  • F17C2201/0157—Polygonal
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
  • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
  • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
  • F17C2201/05—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
  • F17C2203/03—Thermal insulations
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
  • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
  • F17C2203/00—Vessel construction, in particular walls or details thereof
  • F17C2203/03—Thermal insulations
  • F17C2203/0304—Thermal insulations by solid means
  • F17C2203/0358—Thermal insulations by solid means in form of panels
• • 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
• • 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
• • 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
  • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
  • F17C2227/01—Propulsion of the fluid
  • F17C2227/0128—Propulsion of the fluid with pumps or compressors
  • F17C2227/0135—Pumps
  • F17C2227/0142—Pumps with specified pump type, e.g. piston or impulsive type
• • 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
• • 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
  • F17C2270/0107—Wall panels

Definitions

• the invention relates to the field of sealed and thermally insulating membrane tanks.
• the invention relates to the field of sealed and thermally insulating tanks for the storage and/or transport of liquefied gas at low temperature, such as tanks for the transport of Liquefied Petroleum Gas (also called LPG) having for example a temperature between -50°C and 0°C, or for the transport of Liquefied Natural Gas (LNG) at around -162°C at atmospheric pressure.
• LPG Liquefied Petroleum Gas
• LNG Liquefied Natural Gas
• the liquefied gas is LNG, at atmospheric pressure.
• Other liquefied gases can also be considered, in particular ethane, propane, butane, hydrogen or ethylene.
• Vessel tanks for the transport of liquefied natural gas generally comprise a double wall comprising successively, from the inside towards the outside of the tank, a primary waterproof membrane, a primary thermally insulating barrier, a secondary waterproof membrane and a thermally secondary insulation.
• the secondary insulating barrier includes a secondary insulating block comprising a cover plate forming a support surface for the secondary waterproof membrane.
• Patent application FR 3 090 810 describes a sealed and insulating tank wall in which an anchoring system makes it possible to anchor a primary insulating block to the secondary insulating block.
• the anchoring system includes a base attached to the cover plate.
• a movable part is retained in the base in a direction of thickness of the wall and movably mounted in the base.
• the moving part has a tapped hole opening onto an upper surface of the moving part.
• the upper surface of the movable part is flush with an upper surface of the cover plate and the movable part is mounted in the free base in translation at least parallel to the longitudinal direction of the welding flange.
• the proposed anchoring system does not give full satisfaction. Indeed, the moving part is subject to seizure phenomena, caused in particular by an excessively high coefficient of friction of the metal part as well as by the lack of homogeneity of the coefficient of friction on the surface of an untreated metal part.
• One idea underlying the invention is to limit the seizing of the moving part present in the primary anchoring system of a sealed and thermally insulating tank.
• Another idea underlying the invention is to promote sliding of the moving part only in the desired directions.
• the invention provides a sealed and thermally insulating tank for storing a fluid, the tank comprising a wall of the tank successively comprising, in a direction of thickness, a secondary insulating barrier retained at a load-bearing wall , a secondary waterproof membrane resting against the secondary insulating barrier, a primary insulating barrier resting against the secondary waterproof membrane and a primary waterproof membrane resting against the primary insulating barrier, wherein the secondary insulating barrier comprises a secondary insulating block comprising a cover plate forming a support surface for the secondary waterproof membrane, wherein said secondary waterproof membrane comprises a plurality of metal strakes, the metal strakes having raised edges towards the inside of the tank, said metal strakes being welded in pairs, by their raised edges on two faces of a welding wing mechanically retained on the secondary block, said welding wing being partially engaged in a groove formed in the cover plate and extending in a longitudinal direction, in which the primary insulating barrier comprises a primary insulating block anchored to the secondary
• the sliding layer improves the durability of the primary anchoring system.
• the moving part can thus move in the body while minimizing the friction between these two parts and thus limiting the forces applied to the welds between the primary anchoring and the secondary membrane and thereby increasing the life of the primary anchoring system. This also makes it possible to maintain movement of the mobile part only in the desired direction and thus to avoid jamming of the part.
• such a tank may comprise one or more of the following characteristics.
• a compressible material is inserted into interstices located between the retaining part and the moving part or between the moving part and the walls of the housing.
• the compressible material is insulating and is for example chosen from polymer foams and mineral wools. Thanks to the compressible nature of the material, it is possible to adjust the initial position of the moving part to a centered position allowing the moving part good freedom of movement in one direction or the other during commissioning.
• the compressible material can be a low stiffness spring.
• the sliding layer is made of polymer.
• the sliding layer is chosen from the following polymers: PTFE (polytetrafluoroethylene), PCTFE (polychlorotrifluoroethylene), POM (polyoxymethylene) preferably type H for homopolymer, PEI (polyetherimide), PAEK (polyaryletherketone), PEEK (polyetheretherketone).
• PTFE polytetrafluoroethylene
• PCTFE polychlorotrifluoroethylene
• POM polyoxymethylene
• PEI polyetherimide
• PAEK polyaryletherketone
• PEEK polyetheretherketone
• the polymer is fiber-reinforced, for example with fiberglass. This has the advantage of increasing the material's resistance to creep and reducing the coefficient of thermal contraction of the sliding layer.
• the polymer sliding layer is made of a polymer filled with particulate fillers, the particulate fillers preferably comprising nanofillers.
• the particulate fillers preferably comprising nanofillers.
• a nanofiller is defined by its dimension between 1 and 100 nanometers.
• the shape of the particulate fillers, in particular nanofillers, can be chosen for example from: sheet, fiber, granule and sphere.
• the particulate fillers are made of at least one material selected from: carbon, graphite, glass, cellulose, and bronze.
• the sliding layer is obtained by surface treatment of said at least one surface of the body.
• the sliding layer is placed on a surface of the retaining part in contact with the moving part.
• the sliding layer is placed on a surface of the retaining part in contact with the moving part and on the moving part.
• the housing has a depth in the direction of thickness such that the movable part is flush with the support surface and a length in the longitudinal direction and a width in a transverse direction such that the movable part can move at the least parallel to the longitudinal direction of the metal strakes.
• the cover plate comprises a countersink on the edge of the housing, the countersink receiving the retainer, the countersink having a depth such that the retainer is flush with the support surface, in which the retainer covers completely the housing and the counterbore and has an opening, the upper face of the body flush through said opening.
• the movable part comprises a base having a width greater than that of the opening in the retaining part.
• the movable part comprises an upper part having a width equal to that of said opening, the upper part being flush with an upper surface of the retaining part.
• At least the base of the moving part includes the sliding layer.
• an upper surface of the base is covered by the slip layer. This reduces friction between the moving part and a bottom surface of the retainer.
• one side of the upper part is covered by the sliding layer. This reduces friction between the moving part and an edge of the retainer opening.
• the retaining piece is a retaining plate.
• the retaining piece is made of steel, for example stainless steel and/or cryogenic steel.
• the retaining plate is fixed to the cover plate by fasteners placed on the periphery of the retaining plate, so that the fasteners are arranged outside the housing around the housing and/or by gluing .
• the fasteners for example screws or rivets, are not likely to come into contact with the moving part.
• the moving part comprises a tapped hole opening onto said upper face of the moving part and the primary anchoring system further comprises a stud having a threaded lower part screwed into the tapped hole.
• the stud has a flange extending above the moving part, in which the flange is welded on the periphery to the secondary waterproof membrane in a leaktight manner.
• Such a tank can be part of an onshore storage facility, for example to store LNG or be installed in a floating, coastal or deep-water structure, in particular an LNG carrier, a floating storage and regasification unit (FSRU) , a floating production and remote storage unit (FPSO) and others.
• FSRU floating storage and regasification unit
• FPSO floating production and remote storage unit
• Such a tank can also serve as a fuel tank in any type of ship.
• the primary anchoring system further comprises at least one washer and at least one nut cooperating with threaded upper parts of said stud to retain said washer resting on a bottom plate of the primary insulating block.
• a vessel for the transport of a cold liquid product comprises a double hull and an aforementioned tank arranged in the double hull.
• the invention also provides a transfer system for a cold liquid product, the system comprising the aforementioned vessel, insulated pipes arranged so as to connect the tank installed in the hull of the vessel to a floating storage installation or land and a pump to drive a flow of cold liquid product through the insulated pipes from or to the floating or land storage facility to or from the ship's tank.
• the invention also provides a method for loading or unloading such a ship, in which a cold liquid product is conveyed through insulated pipes from or to a floating or terrestrial storage installation to or from the ship's tank.
• FIG. II There is a schematic sectional view of detail II of the illustrating an anchoring system cooperating with a stud according to a first embodiment.
• FIG. 1 There is a schematic top view of the anchoring system according to the first embodiment comprising in particular a moving part and a retaining part.
• FIG. 1 There is a schematic perspective view of a retainer according to a first variant.
• a sealed and thermally insulating tank 1 for storing a liquefied fluid, such as liquefied natural gas (LNG).
• the tank 1 has a generally polyhedral shape and comprises several walls.
• the wall of the tank 1 comprises successively, in the direction of the thickness, from the outside towards the inside of the tank 1, a secondary thermally insulating barrier 2 retained on a supporting structure 3, a secondary sealed membrane 4 resting against the secondary thermally insulating barrier 2, a primary thermally insulating barrier 5 resting against the secondary sealed membrane 4 and a primary sealed membrane 6 intended to be in contact with the liquefied natural gas contained in the tank 1.
• the supporting structure of the tank 1 can in particular be formed by the hull or the double hull of a ship.
• the load-bearing structure comprises a plurality of load-bearing walls 3 defining the general shape of the view, usually a polyhedral shape.
• the secondary thermally insulating barrier 2 comprises a plurality of secondary insulating blocks 7 which are anchored to the load-bearing wall 3 by means of secondary anchoring systems 98.
• the secondary insulating blocks 7 have a generally parallelepipedal shape and are arranged in parallel rows. Three rows are indicated by the letters A, B and C.
• Mastic sausages (not shown) are interposed between the secondary insulating blocks 7 and the load-bearing wall 3 to compensate for the differences of the load-bearing wall 3 with respect to a flat surface of reference.
• a kraft paper can be inserted between the mastic rolls and the load-bearing wall 3 if desired to prevent the mastic rolls from sticking to the load-bearing wall 3.
• the cover plates 10 comprise a plurality of parallel grooves 20, the distance between two grooves 20 corresponding to the width of a strake 21, while the distance between a free edge of a block and an adjacent groove 20 corresponds to the width of a strake 21, so that a strake forms the junction between two adjacent insulating blocks 7.
• the secondary waterproof membrane 4 is retained on the secondary thermally insulating barrier 2.
• the weld flanges and the grooves 20 form sliding joints allowing the strakes 21 to contract and deform relative to the secondary insulating blocks 7.
• the primary thermally insulating barrier 5 comprises a plurality of superposed primary insulating blocks 22 straddling two rows of secondary insulating blocks 7.
• the primary insulating blocks 22 are anchored to the secondary insulating blocks 7 by means of primary anchoring systems 97.
• primary anchoring systems 97 are separated and offset from the secondary anchoring systems 98.
• the primary insulating blocks 22 have a generally parallelepipedic shape and are arranged in parallel rows. In addition, they have dimensions identical to those of the primary insulating blocks 22 with the exception of their thickness in the direction of thickness of the wall 1 of the vessel which is likely to be different, and in particular lower.
• the primary thermally insulating barrier 5 is surmounted by a metal sealing barrier with corrugations. Alternatively, the thermally insulating barrier 5 could be surmounted by a metal sealing barrier composed of strakes.
• the cover plate 10 comprises in particular a layer of plywood with a thickness of between 15 and 24 millimeters, in which the housing is hollowed out.
• An opening 103 where the moving part 102 is flush is also filled with a piece of compressible insulating material 105.
• the piece of compressible insulating material 105 is shown on only one side of the moving part 102, but another identical part can also be placed on the other side to initially center the moving part 102 with respect to the opening 103.
• a sliding layer 106 covers at least one side of the moving part 102.
• the pre-positioning of the movable part 102 for example a centered pre-positioning, obtained thanks to the pieces of compressible insulating material 105 ensures that a certain range of mobility exists in one direction or the other in the longitudinal direction of the strakes. 21.
• This mobility makes it possible to adjust the position of the pin 35, if necessary, either during the welding of the secondary waterproof membrane 4 to catch up with positioning tolerances, or during the operation of the tank to absorb deformations which may have various causes.
• Figures 4 to 10 show different embodiments of the mobile part 102-702 of the primary anchoring system while Figures 11 and 12 show two variant embodiments of the retaining part 101-201.
• the sliding shoe 106 can be replaced by a nitriding treatment applied to the moving part 102 on the sides 115 of the upper part 114 and on the upper surface 111 of the lower part 110.
• the moving part 202 differs from the first embodiment in that the upper part 214 is cylindrical with a tapped hole 204.
• the lower part 210 is a base of rectangular section.
• an upper surface 211 of the lower part 210 comprises a slip layer.
• One side 215 of top 214 may also include a slip layer.
• the sliding layer 206 is obtained either by surface treatment of the upper surface 211 (and optionally of the side 215), or by covering the upper surface 211 (and optionally the side 215) with a sliding pad.
• the moving part 302 differs from the second embodiment in that the upper part 314 is of rectangular section with rounded edges, with dimensions in a longitudinal direction and in a transverse direction smaller than those of the lower part 310.
• the sliding layer 306 is obtained by surface treatment of an upper surface 311 of the lower part 310 and, optionally, of the sides 315 of the upper part 314 or by covering said upper surface 311 and optionally said sides 315 with a sliding pad.
• the moving part 402 differs from the second embodiment in that the upper part 414 is of rectangular section and has a dimension in a longitudinal direction identical to that of the lower part 410.
• the sliding layer 406 is obtained by surface treatment of an upper surface 411 of the lower part 410 and, optionally, of the sides 415 of the upper part 414, or by covering the said upper surface 411 and optionally the said sides 415 with a sliding pad.
• the moving part 602 differs from the first embodiment in that the polymer slider 606 has dimensions in the longitudinal direction and in the transverse direction greater than that of the lower part 610.
• the moving part 702 differs from the second embodiment in that the sliding shoe 706 is made of polymer and is of parallelepipedal shape with rounded edges and has a dimension in the longitudinal direction identical to that of the lower part 710.
• the part bottom 710 is also covered by the sliding shoe 706.
• the sliding shoe 606 or 706 can be replaced by a surface treatment of an upper surface of the lower part 610 or 710 and, optionally, of the side of the upper part 614 or 714.
• the retainer 101 is a rectangular-shaped retaining plate, with a rectangular opening where the movable part 102-702 is flush and with four tapped holes 119 at the ends to fix the fasteners 34 there.
• This second variant differs from the first in that the retaining plate 201 is circular in shape.
• the two retaining part variants are in particular compatible with all the embodiments of the moving part.
• the retainer can be made in various other ways, for example by having another shape and having a different number of tapped holes.
• a cutaway view of an LNG carrier 70 shows a sealed and insulated tank 71 of generally prismatic shape mounted in the double hull 72 of the ship.
• the wall of the tank 71 comprises a primary leaktight barrier intended to be in contact with the LNG contained in the tank, a secondary leaktight barrier arranged between the primary leaktight barrier and the double hull 72 of the ship, and two insulating barriers arranged respectively between the primary waterproof barrier and the secondary waterproof barrier and between the secondary waterproof barrier and the double hull 72.
• loading/unloading pipes 73 arranged on the upper deck of the ship can be connected, by means of appropriate connectors, to a maritime or port terminal to transfer a cargo of LNG from or to the tank 71.
• the loading and unloading station 75 is a fixed offshore installation comprising a mobile arm 74 and a tower 78 which supports the mobile arm 74.
• the mobile arm 74 carries a bundle of insulated flexible pipes 79 which can be connected to the loading/unloading pipes 73.
• the orientable mobile arm 74 adapts to all sizes of LNG carriers.
• a connecting pipe, not shown, extends inside the tower 78.
• the loading and unloading station 75 allows the loading and unloading of the LNG carrier 70 from or to the shore installation 77.
• This comprises liquefied gas storage tanks 80 and connecting pipes 81 connected by the underwater pipe 76 to the loading or unloading station 75.
• the underwater pipe 76 allows the transfer of the liquefied gas between the loading or unloading station 75 and the shore installation 77 over a great distance, for example 5 km, which makes it possible to keep the LNG carrier 70 at a great distance from the coast during loading and unloading operations.
• pumps on board the ship 70 and/or pumps fitted to the shore installation 77 and/or pumps fitted to the loading and unloading station 75 are used.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Ocean & Marine Engineering (AREA)
• Architecture (AREA)
• Structural Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Filling Or Discharging Of Gas Storage Vessels (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=79601567

Family Applications (1)

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Family Cites Families (5)

• 2021
  • 2021-11-22 FR FR2112339A patent/FR3129455B1/fr active Active
• 2022
  • 2022-11-21 EP EP22818758.9A patent/EP4433744B1/de active Active
  • 2022-11-21 WO PCT/EP2022/082536 patent/WO2023089156A1/fr not_active Ceased
  • 2022-11-21 KR KR1020237012386A patent/KR102681744B1/ko active Active
  • 2022-11-21 JP JP2024529912A patent/JP2024540602A/ja active Pending
  • 2022-11-21 CN CN202280006899.0A patent/CN116490720B/zh active Active
  • 2022-11-21 ES ES22818758T patent/ES3060644T3/es active Active
  • 2022-11-21 TW TW111144457A patent/TW202332857A/zh unknown

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