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
  • 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
  • F17C13/00—Details of vessels or of the filling or discharging of vessels
  • F17C13/001—Thermal insulation specially adapted for cryogenic vessels
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
  • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
  • 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
  • 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
  • F17C2209/00—Vessel construction, in particular methods of manufacturing
  • F17C2209/22—Assembling processes
  • F17C2209/227—Assembling processes by adhesive means
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
  • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
  • F17C2221/00—Handled fluid, in particular type of fluid
  • F17C2221/03—Mixtures
  • F17C2221/032—Hydrocarbons
  • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
  • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
  • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
  • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
  • F17C2223/0146—Two-phase
  • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
  • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
  • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
  • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
  • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
  • F17C2223/033—Small pressure, e.g. for liquefied gas
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
  • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
  • F17C2260/00—Purposes of gas storage and gas handling
  • F17C2260/01—Improving mechanical properties or manufacturing
  • F17C2260/013—Reducing manufacturing time or effort
• • 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 tanks, with membranes, and in particular to the manufacture of corner structures of such a tank.
• 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) exhibiting by example a temperature between -50 ° C and 0 ° C, or for the transport of Liquefied Natural Gas (LNG) at approximately -162 ° C at atmospheric pressure.
• LPG Liquefied Petroleum Gas
• LNG Liquefied Natural Gas
• Document FR2691520 discloses a corner structure comprising two bevelled panels which are intended to form the corner of a secondary thermally insulating barrier and which are contiguous to one another via their bevelled edge.
• a rigid waterproof sheet made of a laminated composite material comprising a layer of aluminum between two layers of fiberglass. glass and resin.
• a flexible waterproof sheet is stuck astride the rigid waterproof sheets of the two beveled panels while the beveled panels are contiguous to one another and the internal faces of the two bevelled panels form with respect to each other an angle corresponding to that of the corner zone to be manufactured.
• An idea underlying the invention is to facilitate the manufacture of a corner structure for a sealed and thermally insulating tank.
• Another idea underlying the invention is to improve the manufacturing process in order to decrease manufacturing time, limit the number of operators and / or reduce the raw material used.
• the invention provides a method of manufacturing a corner structure intended for the manufacture of a sealed and thermally insulating tank comprising at least one thermally insulating barrier and a bonded waterproofing membrane on said thermally insulating barrier; the process comprising:
• the step of bonding the flexible waterproof sheet is performed on a flat or substantially flat surface formed by the internal faces of the first and second panel, thus making it possible to facilitate the performance of this step during the process. manufacturing and therefore improve it in particular by reducing the manufacturing time.
• the gluing step is performed before the step of arranging the first panel and the second panel in the second position where they are inclined relative to each other. Thus, the bonding is carried out without constraint linked to the inclination of the area to be bonded.
• sealingly bonding means a bonding carried out continuously making it possible to form between the elements bonded to each other a continuous and sealed surface.
• the flexible waterproof sheet thus comes during the bonding step to cover in a sealed manner the space left free between the rigid waterproof sheet of the first panel and the rigid waterproof sheet of the second panel.
• a method may include one or more of the following characteristics.
• the angle of the tank is an angle of 90 ° or an angle of 135 °.
• the sealed and thermally insulating tank to be manufactured comprises at least one thermally insulating barrier and a sealing membrane bonded to said thermally insulating barrier.
• the first panel and the second panel are of parallelepiped shape, preferably of rectangular parallelepiped shape.
• an inter-panel space is provided between a side edge of the first panel and a side edge of the second panel, the method comprises:
• the insulating block being configured to fill the inter-panel space.
• the inter-panel space is filled with several insulating blocks.
• the insulating block (s) has a density greater than or equal to 30 kg / m3 and advantageously greater than 60 kg / m3, which allows it to have a function of structural strength, in particular when the corner structure is pre-assembled before being positioned in the corner of the tank.
• the insulating block (s) have no structural strength function.
• the method comprises:
• insulating block between the first panel and the second panel arranged in the second position, said insulating block having a first face disposed in the plane of the outer face of the first panel and a second face disposed in the plane of the face of the second panel.
• the insulating block (s) complete the insulation of the corner structure by filling in the space formed between the first panel and the second panel following placement in the second position.
• the insulating block is made of insulating foam, preferably of insulating foam reinforced with fibers, for example a polyurethane foam reinforced with glass fibers.
• the insulating block comprises a box and an insulating lining located inside the box.
• the insulating lining can be, for example, glass wool, rock wool or perlite.
• the insulating block is glued to the side edge of the first panel and to the side edge of the second panel.
• the step of bonding the flexible waterproof sheet is carried out by means of an automatic bonding machine.
• the glue used during the bonding step is composed of polymer glue, preferably polyurethane glue.
• the automatic gluing machine comprises one or more glue applicators, one or more flexible waterproof sheet dispensing rollers, a heating device for polymerizing the glue after laying the flexible waterproof sheet, a frame and a motorization device for moving the machine.
• the first panel and / or the second panel comprises a layer of insulating foam, a top plate bonded to the layer of insulating foam and a rigid waterproof sheet bonded to the top plate, an upper surface of the rigid waterproof sheet forming the internal face of the first panel and / or of the second panel.
• the first panel and / or the second panel further comprises a lower plate bonded to the layer of insulating foam.
• the lower plate and / or the upper plate is made of wood, plywood or composite material.
• the insulating foam layer of the first panel, the insulating foam layer of the second panel and the insulating block form a thermally insulating barrier in the corner zone of the sealed and thermally insulating tank to be manufactured
• the rigid waterproof sheet of the first panel, the rigid waterproof sheet of the second panel and the flexible waterproof sheet forming a waterproofing membrane in the corner zone of the tight and thermally insulating tank to be manufactured
• the rigid waterproof sheet of the first panel and the rigid waterproof sheet of the second panel are made of a laminated composite material comprising a layer of aluminum between two layers of glass fibers and resin.
• the rigid waterproof sheet of the first panel or of the second panel can also be made of any other waterproof material, such as for example a metal layer surrounded by two layers of fibers and resin.
• the layer of insulating foam of the first panel, the layer of insulating foam of the second panel and / or the block of insulating foam are made of fiber reinforced foam, preferably of polyurethane foam reinforced with fiberglass.
• the first panel and / or the second panel comprises a layer of insulating foam reinforced with fibers.
• the flexible waterproof sheet is made of a laminated composite material comprising a layer of aluminum between two layers of glass fibers.
• the flexible waterproof sheet can also be made from any other waterproof material, such as, for example, a metal layer surrounded by two layers of fibers.
• the step of arranging the first panel and the second panel in the second position comprises the following sub-steps:
• a support device comprising a first support surface and a second support surface, the first support surface and the second support surface forming an angle equal to the angle of the corner zone of the sealed tank and thermally insulation to manufacture
• the support device is formed by a supporting structure of the vessel to be manufactured, the first support surface being formed by a first supporting wall and the second supporting surface being formed by a second supporting wall , the method comprising the step of fixing the first panel and the second panel to the supporting structure.
• the step of arranging the first panel and the second panel in the first position comprises the following sub-steps:
• - provide a support device comprising a first support surface and a second support surface, the first support surface and the second support surface extending in the same plane,
• the second support surface is contiguous with the first support surface along an edge of the support device.
• the support device comprises an angling device configured to rotate the first support surface and / or the second support surface, and in which during the step of arranging the first panel and the second panel in the second position, the method comprises the following sub-step:
• the support device makes it possible to support the two panels during the disposal step in the first position and during the gluing step but also to move the two panels to the second position using the angling device.
• the angling device is configured to rotate the first support surface and / or the second support surface along an axis corresponding to the edge of the support device.
• the waterproofing membrane is a secondary waterproofing membrane and the thermally insulating barrier is a secondary thermally insulating barrier, the tight and thermally insulating vessel to be manufactured comprising a primary thermally insulating barrier and a membrane primary sealant.
• the method comprises the steps of:
• the angle iron comprising a first part fixed to the internal face of the first block and a second part connected to the first part and fixed on the internal face of the second block,
• first and second blocks as well as the angle iron make it possible to maintain the inclination between the first panel and the second panel.
• the first block is fixed by gluing on the internal face of the first panel and the second block is fixed by gluing on the internal face of the second panel.
• the first block and the second block are of parallelepiped shape, preferably of rectangular parallelepiped shape.
• the first part of the angle iron is inclined relative to the second part of the angle iron by an angle corresponding to the angle of the corner zone of the sealed and thermally insulating tank to be manufactured .
• the method comprises the steps of:
• the method comprises the steps of:
• said block of insulating foam Arranging said block of insulating foam between the first panel and the second panel, said block of insulating foam having a first face disposed in the plane of the outer face of the first panel and a second face disposed in the plane of the outer face of the second panel.
• the step of arranging the insulating block is carried out after the step of fixing the first panel and the second panel to the supporting structure.
• the step of disposing of the insulating block is performed after the step of moving the first panel and the second panel on the support device.
• the invention provides a corner structure intended for the manufacture of a sealed and thermally insulating tank, obtained by the manufacturing process described above, the corner structure comprising:
• first panel and a second panel each having an internal face and an external face; the internal face of the first panel is inclined relative to the internal face of the second panel by an angle corresponding to the angle of a corner zone of the sealed and thermally insulating tank to be manufactured;
• a flexible waterproof sheet stuck astride the internal face of the first panel and the internal face of the second panel by means of an adhesive having a duration of use before complete hardening at room temperature of less than 75 min, preferably less than 60 min, more preferably between 25 and 50 minutes.
• an adhesive used can be a two-component polyurethane adhesive having the reference XPU 1841 1 A3n / B.
• the period is expected by duration before complete hardening, from the moment when the two components of an adhesive have been mixed and the chemical reaction takes place or after exposure to ambient air, during which it is usable before the adhesive has completely hardened.
• This duration is calculated for 100 cm 3 of glue at 23 ° C. and is commonly called “Pot-life” or duration of use before complete hardening.
• FIG. 1 shows a schematic exploded view in particular of the first panel and of the second panel in the first position with the flexible waterproof sheet bonded according to one embodiment.
• FIG. 2 is a schematic front view in particular of the first panel and of the second panel in the first position with the flexible waterproof sheet bonded according to one embodiment.
• FIG. 3 shows a schematic front view, in particular of the first panel and of the second panel in the second position, arranged in the support device according to a first embodiment.
• FIG. 4 represents a schematic perspective view in particular of the first panel and of the second panel in the second position, according to the first embodiment.
• Figure 5 shows a schematic exploded view of a primary corner arrangement according to one embodiment.
• Figure 6 shows a schematic front view of a particular primary corner arrangement attached to a secondary corner arrangement, all arranged in the support device according to one embodiment.
• FIG. 7 represents a schematic front view in particular of the first panel and of the second panel from the first position to the second position, arranged in the support device according to a second embodiment.
• a sealed and thermally insulating tank comprises a plurality of walls each formed of at least one thermally insulating barrier and at least one sealing membrane.
• a corner structure 1 is placed in order to ensure the continuity of the thermally insulating barrier and of the waterproofing membrane of the two walls.
• the vessel walls comprise a secondary thermally insulating barrier 2, a secondary waterproofing membrane 3 supported by the barrier secondary thermally insulating barrier 2, a primary thermally insulating barrier 4 attached to the secondary waterproofing membrane 3 and a primary waterproofing membrane supported by the primary thermally insulating barrier 4.
• the corner structure 1 comprises at least elements forming a part of the secondary thermally insulating barrier 2 of the tank to be manufactured, at least elements forming a part of the secondary sealing membrane 3 of the tank to manufacture and possibly at least elements forming part of the primary thermally insulating barrier 4 of the tank to be manufactured. Consequently, the corner structure makes it possible to ensure the continuity of the various thermally insulating barrier and waterproofing membrane at the junction between a first tank wall and a second tank wall inclined relative to the first tank wall. a determined angle, for example an angle of 90 ° or an angle of 135 °.
• Figures 1 to 6 illustrate such a method of manufacturing a corner structure 1 at different stages of the manufacturing process.
• Figures 1 and 2 show the first steps in the manufacture of such a corner structure 1.
• Figure 1 It is illustrated in Figure 1 the provision of a first panel 5 and a second panel 6 in a first position where they are placed edge to edge so that the internal face 7 of the first panel 5 is in the same plane as the inner face 7 of the second panel 6 and that the outer face 8 of the first panel 5 and the outer face 8 of the second panel are in the same plane.
• the first panel 5 and the second panel 6 comprise a lower plate 9, an upper plate 1 1 and possibly an intermediate plate, for example made of plywood.
• the first panel 5 and the second panel 6 also comprise one or more layers of insulating foam 10 sandwiched between the lower plate 9, the upper plate 10 and the possible intermediate plate and glued to them.
• the insulating foam can in particular be a polymer foam based on polyurethane, optionally reinforced with fibers.
• the lower plate 9, the insulating layer or layers 10 and the upper plate 1 1 of the first and second panels 5, 6 constitute the elements of the corner structure forming a portion of the secondary thermally insulating barrier 2 of the tank to manufacture. This set of secondary insulating angle arrangement is thus called.
• the first panel 5 and the second panel 6 also each comprise a rigid waterproof sheet 12 bonded to the upper plate 1 January.
• the rigid waterproof sheet 12 is made of the same material as the secondary thermally insulating barrier 2 of the walls of the tank to be manufactured so that the rigid waterproof sheet 12 of the first panel 5 forms a continuity, at the level of the corner structure 1, of the thermally insulating barrier secondary 2 of the first tank wall while the rigid waterproof sheet 12 of the second panel 6 forms a continuity, at the level of the corner structure 1, of the secondary thermally insulating barrier 2 of the second tank wall.
• the method comprises a step of bonding a flexible waterproof sheet 13 shown in Figure 2.
• the bonding step is performed when the first panel 5 and the second panel 6 are in the first position, namely in which the internal faces 7 of the panels 5, 6 are in the same plane, so that the bonding of the flexible waterproof sheet 13 is done on a flat surface.
• the flexible waterproof sheet 13 is stuck in a sealed manner astride the internal face 7 of the first panel 5 and the internal face 7 of the second panel 6.
• one or several lines of glue 14 are placed on the internal face 7 of the first panel 5 and on the internal face of the second panel 6 then the flexible waterproof sheet 13 is placed on the lines of adhesive placed on the flat surface to be glued.
• the flexible waterproof sheet 13 thus comes during the bonding step to cover in a sealed manner the space left free between the rigid waterproof sheet 12 of the first panel 5 and the rigid waterproof sheet 12 of the second panel 6.
• This bonding step is facilitated by the fact that the surface to be bonded is flat, which allows bonding to be performed manually or preferably using an automatic bonding machine, much more efficiently and quickly.
• Such an automatic gluing machine comprises one or more glue applicators, one or more flexible waterproof sheet distribution rollers, a heating device for polymerizing the glue after placing the flexible waterproof sheet, a frame carrying the assembly. elements and a motorization device for moving the machine.
• the gluing machine is moved along the junction zone between the first panel 5 and the second panel 6.
• the automatic gluing machine first deposits lines of glue 14 using glue applicators then the flexible waterproof sheet distribution roller possibly assisted by calibration rollers deposit the flexible waterproof sheet 13 on the junction area above the glue lines 14.
• the glue used is a two-component polyurethane-based polymer glue having a certain rate of polymerization at room temperature.
• the glue used may have a period of use before complete hardening of approximately between 25 and 50 minutes, that is to say the maximum time during which it is possible to apply the glue to the components to be glued. 'to one another.
• the heating plates of the heater are applied above the flexible waterproof sheet 13.
• the rigid waterproof sheet 12 of the first panel 5, the rigid waterproof sheet 12 of the second panel 6 and the flexible waterproof sheet 13 constitute the elements of the corner structure 1 forming a portion of the secondary waterproofing membrane 2 of the tank to be manufactured.
• the rigid waterproof sheet 12 is made of a laminated composite material comprising a layer of aluminum between two layers of glass fibers and resin, called a rigid secondary membrane ("Rigid Secondary Barrier", RSB).
• the flexible waterproof sheet 13 is made of a laminated composite material comprising a layer of aluminum between two layers of glass fibers, called a flexible secondary membrane ("Flexible Secondary Barrier", FSB).
• the method of manufacturing the corner structure comprises a step of placing the first panel 5 and the second panel 6 in a second position. This step is particularly illustrated in Figures 2 and 3.
• the internal face 7, respectively the external face 8, of the first panel 5 is inclined relative to the internal face 7, respectively the external face 8, of the second panel 6 at an angle corresponding to the angle of the corner zone of the sealed and thermally insulating tank to be manufactured.
• the flexible waterproof sheet 13 bends so as to follow the angle formed by the first and second panels 5, 6 in the second position.
• an inter-panel space 33 is provided between a side edge 32 of the first panel 5 and a side edge of the second panel 6 as illustrated in particular in Figure 3.
• the panels 5, 6 are arranged in a support device 16 to allow the assembly thus formed to be maintained in the second position while ensuring that the angle formed corresponds to the angle of the desired tank.
• the support device 16 of the first embodiment illustrated in Figure 3 in particular comprises two fixed flaps forming a first support surface 17 and a second support surface 18.
• the first support surface 17 and the second support surface 18 form an angle equal to the angle of the corner zone of the sealed and thermally insulating tank to be manufactured.
• the method thus comprises the step of placing the outer face 8 of the first panel 5 against the first support surface 17 and of placing the outer face 8 of the second panel 6 against the second support surface 18, as can be seen in the figure. figure 3.
• FIG. 7 illustrates a second embodiment of the support device 16.
• the support device 16 comprises a fixed flap 28 comprising the first support surface 17 and a movable flap 29 comprising the second surface support 18.
• the first support surface 17 and the second support surface 18 of the support device 16 are thus tiltable relative to each other using an angling device 30, between the first position in which the first support surface 17 and the second support surface 18 are in the same plane and the second position in which the first support surface 17 and the second support surface 18 form an angle equal to the angle of the corner zone of the sealed and thermally insulating tank to be manufactured.
• the first panel 5 and the second panel 6 are placed on the support device 16 from the step of arranging in the first position.
• the step of arranging in the second position is therefore here carried out using the angling device which moves the support surfaces 17, 18 from the first position to the second position.
• the movement 31 from the first position to the second position is thus illustrated in Figure 7 by the first panel 5 in dotted line when it is in the first position and in full gear when it is in the second position.
• the angling device 30 may for example be one or more jacks, one or more motors, or a lifting device.
• the support device 16 has two movable flaps which move towards each other.
• the manufacturing method comprises a step of arranging an insulating block 15 under the flexible waterproof sheet 13 and in the inter-panel space 33, namely between the side edge 32 of the first panel 5 and the side edge 32 of the second panel 6.
• the insulating block 15 thus comprises a first face disposed against the side edge 32 of the first panel 5 and a second face disposed against the side edge 32 of the second panel 6, as can be seen in particular in FIG. 3.
• the insulating block 15 is thus placed in this inter-panel space 33 so as to fill the inter-panel space 33 and thus complete the portion of the secondary thermally insulating barrier 2 located in the corner structure 1.
• the step of arranging an insulating block 15 under the flexible waterproof sheet 13 and between the first panel 5 and the second panel 6 is carried out after having moved the corner assembly to the level of a corner of a supporting structure of the sealed and thermally insulating tank to be manufactured so that the external face 8 of the first panel 5 and the external face 8 of the second panel 6 are placed against the supporting structure, and possibly after having fixed the first panel 5 and the second panel 6 to the supporting structure.
• a second flexible waterproof sheet 13 can also be fixed to the outer face 8 of the first panel 5 and to the outer face 8 of the second panel 6 so as to come to be placed against the first face of the insulating block 15 arranged in the plane of the outer face 8 of the first panel 5 and also to be placed against the second face of the insulating block 15 arranged in the plane of the outer face 8 of the second panel 6.
• This second flexible waterproof sheet 13 allows in particular to provide better structural strength to the assembly thus formed by keeping the insulating block 15 in position and participating in the holding in position of the first panel 5 relative to the second panel 6.
• the second flexible waterproof sheet 13 can be attached to the first panel 5 and to the second panel 6 before or after the arrangement of the insulating block between the first panel 5 and the second panel 6.
• the insulating block 15 can be produced in several variants. Indeed, it can be composed of a block of insulating foam reinforced with fibers, such as a polyurethane foam reinforced with glass fibers, which allows the insulating block 15 to also have a structural holding function.
• the insulating block 15 can also be composed of a block of insulating foam not reinforced with fibers or of a material such as glass wool or perlite, whether or not located in a wooden box.
• the insulating block 15 can also comprise a metal angle iron fixed to one face of the first panel 5 and to one face of the second panel 6.
• Figures 5 and 6 illustrate another step of the method of manufacturing the corner structure 1, relating to the fixing of a primary corner arrangement 19 on the first panel 5 and the second panel 6.
• the primary angle arrangement 19 includes a first block 20, a second block 21 and an angle 22, as shown in Figure 5.
• the first block 20 and the second block 21 each have an internal face and a face. external.
• the angle iron 22 comprises a first part 23 fixed to the external face of the first block 20 and a second part 24 connected to the first part 23 and fixed to the external face of the second block 21.
• the first block 20 and the second block 21 comprise fixing holes 27 opening onto the external face of these blocks 20, 21.
• the first part 23 and the second part 24 of the angle iron 22 comprise on the surface facing the blocks 20, 21 fixing devices 26 projecting.
• the fasteners 26 are configured to be fixed inside the fastening holes 27 so as to lock the blocks 20, 21 to the angle 22.
• the primary angle arrangement 19 also comprises a block of primary insulating foam 25 between the first block 20 and the second block 21.
• the block of primary insulating foam 25 has a first face disposed in the plane of the outer face. of the first block 20 and a second face disposed in the plane of the external face of the second block 21.
• the manufacturing process comprises the step of fixing the primary angle arrangement 19 on the secondary angle arrangement formed by the first panel 5, the second panel 6 and the insulating block 15.
• the first block 20 of the primary angle arrangement 19 is fixed, for example by gluing, on a part of the flexible waterproof sheet 13 arranged on the external face 8 of the first panel 5.
• the second block 21 of the primary angle arrangement 19 is fixed, for example by gluing, to another part of the flexible waterproof sheet 13 arranged on the external face 8 of the second panel 6.
• the primary angle arrangement 19 thus allows to keep the inclination between the first panel 5 and the second panel 6 in the second position even after removing the corner structure 1 from the support device 16.
• the technique described above for producing a corner structure 1 can be used in different types of tanks, for example to constitute the corner structure 1 of an LNG tank in an onshore installation or in a structure. floating like an LNG carrier or other.

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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)
• Lining Or Joining Of Plastics Or The Like (AREA)

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• 2019
  • 2019-06-28 FR FR1907183A patent/FR3097934B1/fr active Active
• 2020
  • 2020-06-25 WO PCT/EP2020/067789 patent/WO2020260440A1/fr active Application Filing
  • 2020-06-25 EP EP20734731.1A patent/EP3990818A1/de active Pending
  • 2020-06-25 KR KR1020217042898A patent/KR20220025753A/ko unknown
  • 2020-06-25 CN CN202080047275.4A patent/CN114008373B/zh active Active

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