WO2012127141A1 - Insulating element for a sealed and thermally insulating tank wall - Google Patents

Insulating element for a sealed and thermally insulating tank wall Download PDF

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Publication number
WO2012127141A1
WO2012127141A1 PCT/FR2012/050382 FR2012050382W WO2012127141A1 WO 2012127141 A1 WO2012127141 A1 WO 2012127141A1 FR 2012050382 W FR2012050382 W FR 2012050382W WO 2012127141 A1 WO2012127141 A1 WO 2012127141A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat
insulating
cover panel
insulating element
panel
Prior art date
Application number
PCT/FR2012/050382
Other languages
French (fr)
Inventor
Gery Canler
Pierre Jolivet
Original Assignee
Gaztransport Et Technigaz
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gaztransport Et Technigaz filed Critical Gaztransport Et Technigaz
Priority to CN201280014712.8A priority Critical patent/CN103492784B/en
Priority to AU2012230164A priority patent/AU2012230164B2/en
Priority to KR1020137026088A priority patent/KR101997936B1/en
Publication of WO2012127141A1 publication Critical patent/WO2012127141A1/en

Links

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
    • 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
    • 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
    • F17C2203/0631—Three or more walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0352—Pipes
    • F17C2205/0355—Insulation thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0352—Pipes
    • F17C2205/0364—Pipes flexible or articulated, e.g. a hose
    • 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
    • F17C2260/011—Improving strength
    • 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
    • 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
    • F17C2270/011—Barges
    • 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
    • F17C2270/0134—Applications for fluid transport or storage placed above the ground
    • F17C2270/0136—Terminals

Definitions

  • the invention relates to the field of sealed and thermally insulating vessels arranged in a carrier structure for containing a fluid, in particular to membrane tanks for containing hot or cold liquids, especially liquefied gases.
  • Sealed and thermally insulating tanks are known arranged in the hull of a ship for the transport of a liquefied natural gas (LNG) with a high methane content.
  • LNG liquefied natural gas
  • An insulating box has a plywood cover panel. This cover panel does not have a flat flange formed in its thickness and parallel to the upper surface of the cover panel.
  • the recesses 111 and 121 serve to receive fasteners, and not a closure plate.
  • US-A-3990382 discloses another insulating box having a plywood cover panel. This cover panel does not have a flat flange formed in its thickness and parallel to the upper surface of the cover panel.
  • the opening 7 of FIG. 1 is intended to provide a space that can be traversed by a tubular member 13.
  • the invention provides a sealed and thermally insulating tank arranged in a supporting structure for containing a fluid, in which a wall of the tank comprises at least one insulating barrier and at least one waterproof membrane retained on the insulating barrier.
  • the insulating barrier is constituted by a plurality of substantially parallelepipedal heat insulating elements each having a flat cover panel, the cover panel of a heat insulating element having a generally rectangular shape and having at least two opposite sides protruding relative to the corresponding side walls of the heat-insulating element, the corners of the cover panel of the heat-insulating element comprising in each case a cutout formed in the projecting portion of the cover panel,
  • the heat-insulating elements are juxtaposed so that the projecting sides of the cover panels are substantially edge-to-edge, the upper surface of the cover panels forming a substantially continuous planar bearing surface for the waterproof membrane, a clearance being provided at each between the side walls of the heat-insulating elements to the right of the protruding sides of the cover panels,
  • a retaining member directly or indirectly secured to the supporting structure being arranged at the adjacent corners of four adjacent heat-insulating elements in the clearance between the side walls and cooperating with edge pieces of the four heat-insulating elements to retain the four heat-insulating elements of the insulating barrier directly or indirectly against the supporting structure
  • corner cut of a cover panel is each edged with a plane flange formed in the thickness of the cover panel and parallel to the upper surface of the cover panel,
  • closure plate being received in abutment on the plane edges of the adjacent corners of the four heat-insulating elements.
  • such a tank may comprise one or more of the following provisions.
  • the plane flanges of the adjacent corners of the four heat insulating elements completely surround the window to support an edge portion of the closure plate over the entire periphery of the closure plate.
  • the cutout of the corner of a cover panel has a reentrant corner shape, the planar rim having an L-shaped flat strip along two sides of the reentrant corner.
  • the edge piece of a heat insulating element comprises a cleat fixed to a bottom panel of the heat insulating element at a rim of the bottom panel projecting from the side wall.
  • a heat insulating element comprises in each case a box comprising a bottom panel parallel to the cover panel and spaced from it and lateral sails arranged between the bottom panel and the cover panel to delimit a space interior of the box filled with an insulating liner, the side sails forming the side walls of the heat insulating element, the lateral web parallel to a projecting side of the lid panel having two end portions arranged at each to the right of the flat flange one corner of the cover panel.
  • Such an arrangement allows the lateral web to help regain the pressure exerted by the closure plate under the effect of the load of the tank, which reinforces the flat edges of the cover panel.
  • the cover panel of a heat insulating element comprises two superimposed plywood planks, the upper plank having a larger cutout than the lower plank, so as to discover portions of the upper surface of the lower plank. lid panel at the corners, the exposed portions constituting the flat edges receiving the closure plate.
  • a tank can be part of a land storage facility, for example to store LNG or be installed in a floating structure, coastal or deep water, including a LNG tank, a floating storage and regasification unit (FSRU) , a floating production and remote storage unit (FPSO) and others.
  • a vessel for the transport of a cold liquid product comprises a double hull and a aforementioned tank disposed in the double hull.
  • the invention also provides a method of loading or unloading such a vessel, in which a cold liquid product is conveyed through isolated pipes from or to a floating or land storage facility to or from the vessel vessel.
  • the invention also provides a transfer system for a cold liquid product, the system comprising the abovementioned vessel, insulated pipes arranged to connect the vessel installed in the hull of the vessel to a floating storage facility. or terrestrial and a pump for driving a flow of cold liquid product through the insulated pipelines from or to the floating or land storage facility to or from the vessel vessel.
  • the invention also provides a substantially parallelepipedal heat-insulating element suitable for producing an insulating barrier in a tank wall, the heat-insulating element comprising a flat cover panel having a rectangular overall shape, the cover having at least two opposite sides projecting from the corresponding side walls of the heat-insulating element, the corners of the cover panel of the heat-insulating element having in each case a cutout formed in the projecting portion of the cover panel,
  • the cut of a corner of the cover panel is each edged with a plane flange formed in the thickness of the cover panel and parallel to the upper surface of the cover panel,
  • the heat insulating element being adapted to be juxtaposed with three other identical heat insulating elements adjacent at a corner, so that the cutouts of the adjacent corners of the four heat-insulating elements delimit a window through the surface of the cover panels to the right of the parts of the four heat-insulating elements,
  • An idea underlying the invention is to improve the support of a sealed membrane by the cover panels of a series of juxtaposed heat insulating elements.
  • Some aspects of the invention are based on the idea of extending the top surface of the lid panels at the access points of the heat-insulating members to provide the sealed membrane with a substantially uniform bearing surface. Some aspects of the invention start from the idea of carrying out this extension in a simple manner, independent of the shape of the retaining members and resistant to pressure.
  • Figure 1 is a partial cutaway view of a tank wall.
  • FIG. 2 is an exploded perspective view of a fastener that can be used in the wall of FIG. 1.
  • FIG. 3 is a perspective view of a detail V of the wall of FIG. 1.
  • Figure 4 is a schematic cutaway representation of a tank of LNG tanker and a loading / unloading terminal of the tank.
  • Figure 1 shows a sealed and thermally insulating wall in perspective cut away to show the structure of this wall.
  • Such a structure can be implemented on large surfaces having various orientations, for example example to cover the bottom, ceiling and side of a tank.
  • the orientation of Figure 1 is not limiting in this regard.
  • the tank wall is attached to the wall of a load-bearing structure 1.
  • the term “above” a position located closer to the inside of the tank and “below” a position located closer to the structure carrier 1, regardless of the orientation of the vessel wall relative to the earth's gravity field.
  • the tank wall comprises a secondary insulating barrier 2, a secondary sealed barrier 3 retained on top of the secondary insulating barrier 2, a primary insulating barrier 4 retained on the secondary sealed barrier 3 and a primary sealed barrier 5 retained on the insulating barrier primary 4.
  • the secondary insulating barrier 2 consists of a plurality of parallelepipedal secondary insulating boxes 6 which are arranged side by side, so as to substantially cover the inner surface of the supporting structure 1.
  • Each secondary insulating box 6 consists of a parallelepiped box plywood which internally has partitions 7 interposed between a plywood bottom panel and a top panel 8 wood veneered.
  • the bottom wall of the boxes 6 protrudes laterally on the two short sides of the box, so that in each corner of the box, on this projecting portion, are fixed cleats 9 which cooperate with fasteners of the boxes 2 to the supporting structure .
  • Each box 2 is filled with an insulating particulate material, for example perlite.
  • each box 2 rests on beads of polymerizable resin 10 which are themselves bearing on the supporting structure 1.
  • the polymerizable resin rods 10 are intended to make up the differences between the theoretical surface provided for the structure carrier and the imperfect surface resulting from manufacturing tolerances and to distribute the forces of the caissons 2 on the carrier structure 1 in a relatively homogeneous manner.
  • a sheet of paper (not shown) is inserted between the resin beads 10 and the carrier structure 1 to avoid sticking the boxes 2 to the supporting structure 1.
  • the top panels 8 of the secondary insulating boxes 2 further include a pair of parallel grooves 11 substantially T-shaped inverted to receive welding wings in the form of a square. The portion of the welding flanges projecting towards the top of the panels 8 allows anchoring of the secondary sealing barrier.
  • the secondary sealing barrier consists of a plurality of Invar strakes 12 with raised edges, having a thickness of the order of 0.7 mm. The raised edges of each strake 11 are welded to the aforementioned welding wings.
  • the primary insulating barrier which consists of a plurality of primary insulating boxes 13 having a structure similar to the secondary insulating boxes 6.
  • Each primary insulating box 13 consists of a rectangular parallelepiped box made plywood of a height less than the box 6, which is filled with particulate matter, such as perlite.
  • the primary insulating boxes 13 also include internal partitions 15, a bottom panel and a top panel 14.
  • the top panel 14 has two generally inverted-T-shaped grooves 16 to also receive a welding flange (not shown) on which are welded the raised edges of the strakes 17 of the primary sealing barrier.
  • the distance between two grooves 11 or 11 of the same box 6 or 13 corresponds to the width of a strake 12 or 17.
  • the gap between the grooves and the adjacent edge of the same box corresponds to the half-width of a strake, so that a strake comes to overlap two adjacent boxes.
  • the bottom panel of a primary insulating casing 13 overflows on its short sides, so that cleats 21 abut the protruding portion of the bottom panel to cooperate with the fasteners, as explained below.
  • a fastener comprises a bushing 22 whose base is welded to the supporting structure 1 in a position corresponding to a clearance at the corners of four adjacent secondary insulating boxes 6.
  • the bushing 22 carries a first rod 23 screwed to it.
  • the rod 23 passes between the adjacent boxes 6.
  • the spaces Interlayers between the boxes 6 are filled with a glass wool stuffing to ensure the continuity of the secondary insulating barrier.
  • a metal support plate 24 is mounted on the rod 23 to clamp the cleats 9 against the supporting structure 1 by means of a not shown nut.
  • a piece of plywood 25 is mounted on plate 24 so as to serve as a spacer between the plate 24 and an upper plate 26 and to reduce the thermal bridge to the supporting structure.
  • the wooden part 25 comprises a housing 28 for receiving the threaded end of the rod 23 and its nut, and two holes to be traversed by not shown fastening screws.
  • the head of each fixing screw abuts in a countersink 27 provided in the upper plate 26. The height of this arrangement is determined so that the upper plate 26 comes to be flush at the level of the top panels 8 of the secondary insulating boxes 6.
  • the upper platen 26 further comprises a central threaded bore 29 for receiving a threaded base 30 of a connector 31.
  • the threaded base 30 also passes through a bore formed through a strake 17 of the barrier of FIG. secondary sealing.
  • the coupling 31 comprises a flange 32 which is welded at its periphery to the strake 11 around the bore to re-seal the secondary sealing barrier.
  • the connection 31 is extended by an upper rod 33 on which is screwed an upper nut 34 to ensure the clamping of a metal plate 35 on the cleats 21 of the primary insulating boxes 13.
  • One or more washers 36 may also be inserted between the upper nut 34 and the plate 35.
  • the intermediate space between the faces provided with the cleats 21 of the primary insulating boxes 13 is filled with a glass wool padding to ensure the continuity of the primary insulating barrier.
  • FIG. 3 shows another detail of the primary insulation barrier, still in the area of a fastener at the interface between four primary insulating caissons 13. Only two caissons 13 are shown partially for the sake of clarity. the representation, the two others being symmetrical.
  • the cover panel 14 consists of two superposed boards 46 and 47. At the corner of the box 13, a rectangular cutout 48 is made in the lower board 47 and a rectangular cutout 49 of larger size is made in the upper board 46 Thus are formed a rectangular window 50 centered on the fixing member which makes it possible to have access to the nut 34 when the four boxes 13 are positioned on the secondary waterproof membrane, and a rectangular counterbore 51 surrounding the four sides of the window 50.
  • the counterbore 51 serves to position and retain a closure plate 52 of the same thickness as the upper board 46.
  • the closure plate 52 serves to complete the upper surface of the primary insulating barrier 4 after the nut 34 is correctly tight. Thus, a substantially uniform bearing surface is obtained for receiving the primary watertight barrier 5. Because the counterbore 51 discovers the upper surface of the lower plank 47 along the four sides of the window 50, maintaining the closure plate 52 is solid and stable.
  • the line 53 represents the upper edge of the lateral web 45, which lies under the counterbore 51 and thus supports the lower plate 47 at the long side of this counterbore.
  • the closure plate 52 is held firmly and even more resistant to the pressure in the tank in use.
  • the techniques described above for making a sealed and insulated wall can be used in different types of tanks, for example to form the wall of an LNG tank in a land installation or in a floating structure such as a LNG tank or other.
  • a broken view of a LNG tank 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 sealed barrier intended to be in contact with the LNG contained in the tank, a secondary sealed barrier arranged between the primary waterproof barrier and the double hull 72 of the ship, and two insulating barriers arranged respectively between the fence Primary watertight and secondary watertight barrier and between secondary watertight barrier and double hull 72.
  • loading / unloading lines 73 arranged on the upper deck of the ship can be connected, by means of appropriate connectors, to a marine or port terminal to transfer a cargo of LNG from or to the tank 71.
  • FIG. 4 represents an example of a marine terminal comprising a loading and unloading station 75, an underwater pipe 76 and an onshore installation 77.
  • the loading and unloading station 75 is an off-shore fixed installation comprising an arm mobile 74 and a tower 78 which supports the movable arm 74.
  • the movable arm 74 carries a bundle of insulated flexible pipes 79 that can connect to the loading / unloading pipes 73.
  • the movable arm 74 can be adapted to all gauges of LNG carriers .
  • a connection pipe (not shown) extends inside the tower 78.
  • the loading and unloading station 75 enables the loading and unloading of the LNG tank 70 from or to the shore facility 77.
  • the underwater line 76 allows the transfer of the liquefied gas between the loading or unloading station 75 and the onshore installation 77 over a large distance, for example 5 km, which makes it possible to keep the tanker vessel 70 at great distance from the coast during the loading and unloading operations.
  • pumps on board the ship 70 and / or pumps equipping the shore installation 77 and / or pumps equipping the loading and unloading station 75 are used.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

In a sealed and insulating tank wall, a retaining member (31-35) collaborates with edge pieces (21) of the four insulating elements (13) of the insulating barrier in order to hold the four insulating elements directly or indirectly against the bearing structure. Cutouts at the adjacent corners of the four insulating elements delimit an opening (50) through the cover panels (14) to provide access to the retaining member. A closure plate (52) is positioned in the opening in line with the retaining member (31-35) to complete the substantially continuous planar bearing surface of the sealed membrane. Each cutout at the corner of a cover panel is bordered by a flat rim (51) formed in the thickness of the cover panel (14) and parallel to the upper surface of the cover panel. The closure plate (52) rests on the flat rims (51).

Description

ELEMENT CALORIFUGE POUR PAROI DE CUVE ETANCHE ET THERMIQUEMENT  CALORIFYING ELEMENT FOR WATERPROOF TIGHT AND THERMALLY
ISOLANTE  INSULATION
L'invention se rapporte au domaine des cuves étanches et thermiquement isolantes agencées dans une structure porteuse pour contenir un fluide, notamment aux cuves à membrane pour contenir des liquides chauds ou froids, notamment des gaz liquéfiés.  The invention relates to the field of sealed and thermally insulating vessels arranged in a carrier structure for containing a fluid, in particular to membrane tanks for containing hot or cold liquids, especially liquefied gases.
On connaît des cuves étanches et thermiquement isolantes agencées dans la coque d'un navire pour le transport d'un gaz naturel liquéfié (GNL) à forte teneur en méthane. Une telle cuve est divulguée par exemple dans FR-A-2798902. Un caisson isolant comporte un panneau de couvercle en contreplaqué. Ce panneau de couvercle ne comporte pas de rebord plan ménagé dans son épaisseur et parallèle à la surface supérieure du panneau de couvercle. Les évidements 111 et 121 servent à recevoir des organes d'attache, et non une plaque de fermeture.  Sealed and thermally insulating tanks are known arranged in the hull of a ship for the transport of a liquefied natural gas (LNG) with a high methane content. Such a tank is disclosed for example in FR-A-2798902. An insulating box has a plywood cover panel. This cover panel does not have a flat flange formed in its thickness and parallel to the upper surface of the cover panel. The recesses 111 and 121 serve to receive fasteners, and not a closure plate.
US-A-3990382 décrit un autre caisson isolant comportant un panneau de couvercle en contreplaqué. Ce panneau de couvercle ne comporte pas de rebord plan ménagé dans son épaisseur et parallèle à la surface supérieure du panneau de couvercle. L'ouverture 7 de la figure 1 est destinée à fournir un espace pouvant être traversé par un membre tubulaire 13.  US-A-3990382 discloses another insulating box having a plywood cover panel. This cover panel does not have a flat flange formed in its thickness and parallel to the upper surface of the cover panel. The opening 7 of FIG. 1 is intended to provide a space that can be traversed by a tubular member 13.
Selon un mode de réalisation, l'invention fournit une cuve étanche et thermiquement isolante agencée dans une structure porteuse pour contenir un fluide, dans laquelle une paroi de la cuve comporte au moins une barrière isolante et au moins une membrane étanche retenue sur la barrière isolante, According to one embodiment, the invention provides a sealed and thermally insulating tank arranged in a supporting structure for containing a fluid, in which a wall of the tank comprises at least one insulating barrier and at least one waterproof membrane retained on the insulating barrier. ,
dans laquelle la barrière isolante est constituée par un ensemble d'éléments calorifuges sensiblement parallélépipédiques comportant à chaque fois un panneau de couvercle plan, le panneau de couvercle d'un élément calorifuge présentant une forme globale rectangulaire et comportant au moins deux côtés opposés qui font saillie par rapport aux parois latérales correspondantes de l'élément calorifuge, les coins du panneau de couvercle de l'élément calorifuge comportant à chaque fois une découpe ménagée dans la partie saillante du panneau de couvercle, wherein the insulating barrier is constituted by a plurality of substantially parallelepipedal heat insulating elements each having a flat cover panel, the cover panel of a heat insulating element having a generally rectangular shape and having at least two opposite sides protruding relative to the corresponding side walls of the heat-insulating element, the corners of the cover panel of the heat-insulating element comprising in each case a cutout formed in the projecting portion of the cover panel,
dans laquelle les éléments calorifuges sont juxtaposés de manière que les côtés saillants des panneaux de couvercle soient sensiblement bord à bord, la surface supérieure des panneaux de couvercle formant une surface d'appui plane sensiblement continue pour la membrane étanche, un dégagement étant ménagé à chaque fois entre les parois latérales des éléments calorifuges au droit des côtés saillants des panneaux de couvercle, wherein the heat-insulating elements are juxtaposed so that the projecting sides of the cover panels are substantially edge-to-edge, the upper surface of the cover panels forming a substantially continuous planar bearing surface for the waterproof membrane, a clearance being provided at each between the side walls of the heat-insulating elements to the right of the protruding sides of the cover panels,
un organe de retenue directement ou indirectement solidaire de la structure porteuse étant agencé au niveau des coins adjacents de quatre éléments calorifuges adjacents dans le dégagement entre les parois latérales et coopérant avec des pièces de bord des quatre éléments calorifuges pour retenir les quatre éléments calorifuges de la barrière isolante directement ou indirectement contre la structure porteuse, a retaining member directly or indirectly secured to the supporting structure being arranged at the adjacent corners of four adjacent heat-insulating elements in the clearance between the side walls and cooperating with edge pieces of the four heat-insulating elements to retain the four heat-insulating elements of the insulating barrier directly or indirectly against the supporting structure,
les découpes des coins adjacents des quatre éléments calorifuges délimitant une fenêtre à travers la surface d'appui pour donner accès à l'organe de retenue, une plaque de fermeture étant disposée dans la fenêtre au droit de l'organe de retenue pour compléter la surface d'appui plane sensiblement continue, cutting the adjacent corners of the four heat-insulating elements delimiting a window through the support surface to give access to the retaining member, a closure plate being arranged in the window in line with the retaining member to complete the surface substantially continuous planar support,
caractérisée par le fait que la découpe du coin d'un panneau de couvercle est à chaque fois bordée d'un rebord plan ménagé dans l'épaisseur du panneau de couvercle et parallèle à la surface supérieure du panneau de couvercle, characterized in that the corner cut of a cover panel is each edged with a plane flange formed in the thickness of the cover panel and parallel to the upper surface of the cover panel,
la plaque de fermeture étant reçue en appui sur les rebords plans des coins adjacents des quatre éléments calorifuges. the closure plate being received in abutment on the plane edges of the adjacent corners of the four heat-insulating elements.
Selon des modes de réalisation, une telle cuve peut comporter une ou plusieurs des dispositions suivantes.  According to embodiments, such a tank may comprise one or more of the following provisions.
Selon un mode de réalisation, les rebords plans des coins adjacents des quatre éléments calorifuges entourent complètement la fenêtre pour soutenir une partie de bord de la plaque de fermeture sur toute la périphérie de la plaque de fermeture Selon un mode de réalisation, la découpe du coin d'un panneau de couvercle présente une forme de coin rentrant, le rebord plan comportant une bande plane en forme de L longeant deux côtés du coin rentrant. According to one embodiment, the plane flanges of the adjacent corners of the four heat insulating elements completely surround the window to support an edge portion of the closure plate over the entire periphery of the closure plate. According to one embodiment, the cutout of the corner of a cover panel has a reentrant corner shape, the planar rim having an L-shaped flat strip along two sides of the reentrant corner.
Selon un mode de réalisation, la pièce de bord d'un élément calorifuge comporte un tasseau fixé sur un panneau de fond de l'élément calorifuge au niveau d'un rebord du panneau de fond faisant saillie par rapport à la paroi latérale.  According to one embodiment, the edge piece of a heat insulating element comprises a cleat fixed to a bottom panel of the heat insulating element at a rim of the bottom panel projecting from the side wall.
Selon un mode de réalisation, un élément calorifuge comporte à chaque fois une caisse comportant un panneau de fond parallèle au panneau de couvercle et espacé de celui-ci et des voiles latéraux agencés entre le panneau de fond et le panneau de couvercle pour délimiter un espace intérieur de la caisse rempli d'une garniture isolante, les voiles latéraux formant les parois latérales de l'élément calorifuge, le voile latéral parallèle à un côté saillant du panneau de couvercle présentant deux portions d'extrémités agencées à chaque au droit du rebord plan d'un coin du panneau de couvercle.  According to one embodiment, a heat insulating element comprises in each case a box comprising a bottom panel parallel to the cover panel and spaced from it and lateral sails arranged between the bottom panel and the cover panel to delimit a space interior of the box filled with an insulating liner, the side sails forming the side walls of the heat insulating element, the lateral web parallel to a projecting side of the lid panel having two end portions arranged at each to the right of the flat flange one corner of the cover panel.
Une telle disposition permet que le voile latéral contribue à reprendre l'effort de pression exercé par la plaque de fermeture sous l'effet de la charge de la cuve, ce qui renforce les rebords plans du panneau de couvercle.  Such an arrangement allows the lateral web to help regain the pressure exerted by the closure plate under the effect of the load of the tank, which reinforces the flat edges of the cover panel.
Selon un mode de réalisation, le panneau de couvercle d'un élément calorifuge comporte deux planches de contreplaqué superposées, la planche supérieure comportant une découpe plus étendue que la planche inférieure, de manière à découvrir des portions de la surface supérieure de la planche inférieure du panneau de couvercle au niveau des coins, les portions découvertes constituant les rebords plans recevant la plaque de fermeture.  According to one embodiment, the cover panel of a heat insulating element comprises two superimposed plywood planks, the upper plank having a larger cutout than the lower plank, so as to discover portions of the upper surface of the lower plank. lid panel at the corners, the exposed portions constituting the flat edges receiving the closure plate.
Une telle cuve peut faire partie d'une installation de stockage terrestre, par exemple pour stocker du GNL ou être installée dans une structure flottante, côtière ou en eau profonde, notamment un navire méthanier, une unité flottante de stockage et de regazéification (FSRU), une unité flottante de production et de stockage déporté (FPSO) et autres. Selon un mode de réalisation, un navire pour le transport d'un produit liquide froid comporte une double coque et une cuve précitée disposée dans la double coque. Such a tank can be part of a land storage facility, for example to store LNG or be installed in a floating structure, coastal or deep water, including a LNG tank, a floating storage and regasification unit (FSRU) , a floating production and remote storage unit (FPSO) and others. According to one embodiment, a vessel for the transport of a cold liquid product comprises a double hull and a aforementioned tank disposed in the double hull.
Selon un mode de réalisation, l'invention fournit aussi un procédé de chargement ou déchargement d'un tel navire, dans lequel on achemine un produit liquide froid à travers des canalisations isolées depuis ou vers une installation de stockage flottante ou terrestre vers ou depuis la cuve du navire.  According to one embodiment, the invention also provides a method of loading or unloading such a vessel, in which a cold liquid product is conveyed through isolated pipes from or to a floating or land storage facility to or from the vessel vessel.
Selon un mode de réalisation, l'invention fournit aussi un système de transfert pour un produit liquide froid, le système comportant le navire précité, des canalisations isolées agencées de manière à relier la cuve installée dans la coque du navire à une installation de stockage flottante ou terrestre et une pompe pour entraîner un flux de produit liquide froid à travers les canalisations isolées depuis ou vers l'installation de stockage flottante ou terrestre vers ou depuis la cuve du navire.  According to one embodiment, the invention also provides a transfer system for a cold liquid product, the system comprising the abovementioned vessel, insulated pipes arranged to connect the vessel installed in the hull of the vessel to a floating storage facility. or terrestrial and a pump for driving a flow of cold liquid product through the insulated pipelines from or to the floating or land storage facility to or from the vessel vessel.
Selon un mode de réalisation, l'invention fournit aussi un élément calorifuge sensiblement parallélépipédique convenant pour la réalisation d'une barrière isolante dans une paroi de cuve, l'élément calorifuge comportant un panneau de couvercle plan présentant une forme globale rectangulaire, le panneau de couvercle comportant au moins deux côtés opposés qui font saillie par rapport aux parois latérales correspondantes de l'élément calorifuge, les coins du panneau de couvercle de l'élément calorifuge comportant à chaque fois une découpe ménagée dans la partie saillante du panneau de couvercle,  According to one embodiment, the invention also provides a substantially parallelepipedal heat-insulating element suitable for producing an insulating barrier in a tank wall, the heat-insulating element comprising a flat cover panel having a rectangular overall shape, the cover having at least two opposite sides projecting from the corresponding side walls of the heat-insulating element, the corners of the cover panel of the heat-insulating element having in each case a cutout formed in the projecting portion of the cover panel,
les parois latérales correspondant aux deux côtés opposés de l'élément calorifuge portant des pièces de bord aptes à coopérer avec un organe de retenue, the side walls corresponding to the two opposite sides of the heat-insulating element carrying edge pieces able to cooperate with a retaining member,
caractérisé par le fait que la découpe d'un coin du panneau de couvercle est à chaque fois bordée d'un rebord plan ménagé dans l'épaisseur du panneau de couvercle et parallèle à la surface supérieure du panneau de couvercle, characterized in that the cut of a corner of the cover panel is each edged with a plane flange formed in the thickness of the cover panel and parallel to the upper surface of the cover panel,
l'élément calorifuge étant apte à être juxtaposé avec trois autres éléments calorifuges identiques adjacents au niveau d'un coin, de manière que les découpes des coins adjacents des quatre éléments calorifuges délimitent une fenêtre à travers la surface des panneaux de couvercle au droit des pièces de bord des quatre éléments calorifuges, the heat insulating element being adapted to be juxtaposed with three other identical heat insulating elements adjacent at a corner, so that the cutouts of the adjacent corners of the four heat-insulating elements delimit a window through the surface of the cover panels to the right of the parts of the four heat-insulating elements,
les rebords plans des coins adjacents des quatre éléments calorifuges étant aptes à recevoir une plaque de fermeture plane fermant ladite fenêtre. the plane edges of the adjacent corners of the four heat-insulating elements being able to receive a flat closure plate closing said window.
Une idée à la base de l'invention est d'améliorer le soutien d'une membrane étanche par les panneaux de couvercle d'une série d'éléments calorifuges juxtaposés.  An idea underlying the invention is to improve the support of a sealed membrane by the cover panels of a series of juxtaposed heat insulating elements.
Certains aspects de l'invention partent de l'idée de prolonger la surface supérieure de panneaux de couvercle au niveau des accès aux organes de retenue des d'éléments calorifuges pour offrir à la membrane étanche une surface d'appui sensiblement uniforme. Certains aspects de l'invention partent de l'idée d'effectuer ce prolongement d'une manière simple, indépendante de la forme des organes de retenue et résistante à la pression.  Some aspects of the invention are based on the idea of extending the top surface of the lid panels at the access points of the heat-insulating members to provide the sealed membrane with a substantially uniform bearing surface. Some aspects of the invention start from the idea of carrying out this extension in a simple manner, independent of the shape of the retaining members and resistant to pressure.
L'invention sera mieux comprise, et d'autres buts, détails, caractéristiques et avantages de celle-ci apparaîtront plus clairement au cours de la description suivante de plusieurs modes de réalisation particuliers de l'invention, donnés uniquement à titre illustratif et non limitatif, en référence aux dessins annexés.  The invention will be better understood, and other objects, details, characteristics and advantages thereof will appear more clearly in the course of the following description of several particular embodiments of the invention, given solely for illustrative and non-limiting purposes. with reference to the accompanying drawings.
Sur ces dessins :  On these drawings:
• La figure 1 est une vue partielle écorchée d'une paroi de cuve.  • Figure 1 is a partial cutaway view of a tank wall.
• La figure 2 est une vue en perspective éclatée d'un organe de fixation utilisable dans la paroi de la figure 1.  FIG. 2 is an exploded perspective view of a fastener that can be used in the wall of FIG. 1.
• La figure 3 est une vue en perspective d'un détail V de la paroi de la figure 1.  FIG. 3 is a perspective view of a detail V of the wall of FIG. 1.
• La figure 4 est une représentation schématique écorchée d'une cuve de navire méthanier et d'un terminal de chargement/déchargement de cette cuve.  • Figure 4 is a schematic cutaway representation of a tank of LNG tanker and a loading / unloading terminal of the tank.
La figure 1 représente une paroi étanche et thermiquement isolante en perspective écorchée pour montrer la structure de cette paroi. Une telle structure peut être mise en œuvre sur des surfaces étendues ayant diverses orientations, par exemple pour recouvrir des parois de fond, de plafond et de côté d'un réservoir. L'orientation de la figure 1 n'est donc pas limitative à cet égard. Figure 1 shows a sealed and thermally insulating wall in perspective cut away to show the structure of this wall. Such a structure can be implemented on large surfaces having various orientations, for example example to cover the bottom, ceiling and side of a tank. The orientation of Figure 1 is not limiting in this regard.
La paroi de cuve est attachée à la paroi d'une structure porteuse 1. Par convention, on appellera « au-dessus » une position située plus près de l'intérieur du réservoir et « en dessous » une position située plus près de la structure porteuse 1, quelle que soit l'orientation de la paroi de cuve par rapport au champ de gravité terrestre.  The tank wall is attached to the wall of a load-bearing structure 1. By convention, the term "above" a position located closer to the inside of the tank and "below" a position located closer to the structure carrier 1, regardless of the orientation of the vessel wall relative to the earth's gravity field.
La paroi de cuve comporte une barrière isolante secondaire 2, une barrière étanche secondaire 3 retenue sur le dessus de la barrière isolante secondaire 2, une barrière isolante primaire 4 retenue sur la barrière étanche secondaire 3 et une barrière étanche primaire 5 retenue sur la barrière isolante primaire 4.  The tank wall comprises a secondary insulating barrier 2, a secondary sealed barrier 3 retained on top of the secondary insulating barrier 2, a primary insulating barrier 4 retained on the secondary sealed barrier 3 and a primary sealed barrier 5 retained on the insulating barrier primary 4.
La barrière isolante secondaire 2 est constituée d'une pluralité de caissons isolants secondaires parallélépipédiques 6 qui sont disposés côte à côte, de manière à recouvrir sensiblement la surface interne de la structure porteuse 1. Chaque caisson isolant secondaire 6 est constitué d'une boîte parallélépipédique en bois contre-plaqué qui comporte intérieurement des cloisons 7 intercalées entre un panneau de fond en bois contre-plaqué et un panneau de dessus 8 en bois contre plaqué. La paroi de fond des caissons 6 déborde latéralement sur les deux petits côtés du caisson, de façon que dans chaque angle du caisson, sur cette partie débordante, soient fixés des tasseaux 9 qui coopèrent avec des organes de fixation des caissons 2 à la structure porteuse. Chaque caisson 2 est rempli d'une matière particulaire isolante, par exemple de la perlite. La plaque de fond de chaque caisson 2 repose sur des boudins de résine polymérisable 10 qui sont eux-mêmes en appui sur la structure porteuse 1. Les boudins de résine polymérisable 10 ont pour but de rattraper les écarts entre la surface théorique prévue pour la structure porteuse et la surface imparfaite résultant des tolérances de fabrication et de répartir les efforts des caissons 2 sur la structure porteuse 1 de manière relativement homogène. Une feuille de papier non représentée est insérée entre les boudins de résine 10 et la structure porteuse 1 pour éviter de coller les caissons 2 à la structure porteuse 1. Les panneaux de dessus 8 des caissons isolants secondaires 2 comportent, en outre, une paire de rainures parallèles 11 en forme sensiblement de T inversé pour recevoir des ailes de soudure en forme d'équerre. La partie des ailes de soudure qui fait saillie vers le dessus des panneaux 8 permet l'ancrage de la barrière d'étanchéité secondaire. La barrière d'étanchéité secondaire est constituée d'une pluralité de virures d'Invar 12 à bords relevés, ayant une épaisseur de l'ordre de 0,7 mm. Les bords relevés de chaque virure 11 sont soudés aux ailes de soudure précitées. The secondary insulating barrier 2 consists of a plurality of parallelepipedal secondary insulating boxes 6 which are arranged side by side, so as to substantially cover the inner surface of the supporting structure 1. Each secondary insulating box 6 consists of a parallelepiped box plywood which internally has partitions 7 interposed between a plywood bottom panel and a top panel 8 wood veneered. The bottom wall of the boxes 6 protrudes laterally on the two short sides of the box, so that in each corner of the box, on this projecting portion, are fixed cleats 9 which cooperate with fasteners of the boxes 2 to the supporting structure . Each box 2 is filled with an insulating particulate material, for example perlite. The bottom plate of each box 2 rests on beads of polymerizable resin 10 which are themselves bearing on the supporting structure 1. The polymerizable resin rods 10 are intended to make up the differences between the theoretical surface provided for the structure carrier and the imperfect surface resulting from manufacturing tolerances and to distribute the forces of the caissons 2 on the carrier structure 1 in a relatively homogeneous manner. A sheet of paper (not shown) is inserted between the resin beads 10 and the carrier structure 1 to avoid sticking the boxes 2 to the supporting structure 1. The top panels 8 of the secondary insulating boxes 2 further include a pair of parallel grooves 11 substantially T-shaped inverted to receive welding wings in the form of a square. The portion of the welding flanges projecting towards the top of the panels 8 allows anchoring of the secondary sealing barrier. The secondary sealing barrier consists of a plurality of Invar strakes 12 with raised edges, having a thickness of the order of 0.7 mm. The raised edges of each strake 11 are welded to the aforementioned welding wings.
Sur la barrière d'étanchéité secondaire 2 est montée la barrière isolante primaire qui est constituée d'une pluralité de caissons isolants primaires 13 ayant une structure analogue aux caissons isolants secondaires 6. Chaque caisson isolant primaire 13 est constitué d'une boite parallélépipédique rectangle réalisée en bois contre-plaqué d'une hauteur inférieure au caisson 6, qui est remplie de matière particulaire, comme de la perlite. Les caissons isolants primaires 13 comportent également des cloisons internes 15, un panneau de fond et un panneau de dessus 14. Le panneau de dessus 14 comporte deux rainures 16 en forme générale de T inversé, pour recevoir également une aile de soudure (non représentée) sur laquelle sont soudés les bords relevés des virures 17 de la barrière d'étanchéité primaire. L'écart entre deux rainures 11 ou 11 d'un même caisson 6 ou 13 correspond à la largeur d'une virure 12 ou 17. L'écart entre les rainures et le bord adjacent du même caisson correspond à la demi-largeur d'une virure, de façon qu'une virure vienne chevaucher deux caissons adjacents.  On the secondary sealing barrier 2 is mounted the primary insulating barrier which consists of a plurality of primary insulating boxes 13 having a structure similar to the secondary insulating boxes 6. Each primary insulating box 13 consists of a rectangular parallelepiped box made plywood of a height less than the box 6, which is filled with particulate matter, such as perlite. The primary insulating boxes 13 also include internal partitions 15, a bottom panel and a top panel 14. The top panel 14 has two generally inverted-T-shaped grooves 16 to also receive a welding flange (not shown) on which are welded the raised edges of the strakes 17 of the primary sealing barrier. The distance between two grooves 11 or 11 of the same box 6 or 13 corresponds to the width of a strake 12 or 17. The gap between the grooves and the adjacent edge of the same box corresponds to the half-width of a strake, so that a strake comes to overlap two adjacent boxes.
En outre, le panneau de fond d'un caisson isolant primaire 13 déborde sur ses petits côtés, façon que des tasseaux 21 viennent en appui sur la partie débordante du panneau de fond pour coopérer avec les organes de fixation, comme expliqué ci-dessous.  In addition, the bottom panel of a primary insulating casing 13 overflows on its short sides, so that cleats 21 abut the protruding portion of the bottom panel to cooperate with the fasteners, as explained below.
En se référant maintenant à la figure 2, va décrire un organe de fixation des barrières isolantes primaire et secondaire à la structure porteuse. Un organe de fixation comprend une douille 22 dont la base est soudée à la structure porteuse 1 en une position qui correspond à un dégagement au niveau des coins de quatre caissons isolants secondaires 6 adjacents. La douille 22 porte une première tige 23 vissée à celle-ci. La tige 23 passe entre les caissons 6 adjacents. Les espaces intercalaires entre les caissons 6 sont remplis d'un bourrage de laine de verre pour assurer la continuité de la barrière isolante secondaire. Une platine métallique d'appui 24 est montée sur la tige 23 pour serrer les tasseaux 9 contre la structure porteuse 1 au moyen d'un écrou non représenté. Une pièce en bois contre-plaqué 25 est montée sur platine 24 de façon à servir d'entretoise entre la platine 24 et une platine supérieure 26 et à réduire le pont thermique vers la structure porteuse. La pièce en bois 25 comporte un logement 28 destiné à recevoir l'extrémité filetée de la tige 23 et son écrou, ainsi que deux perçages destinés à être traversés par des vis de fixation non représentée. La tête de chaque vis de fixation vient en appui dans un lamage 27 prévu dans la platine supérieure 26. La hauteur de cet agencement est déterminée de façon que la platine supérieure 26 vienne affleurer au niveau des panneaux de dessus 8 des caissons isolants secondaires 6. Referring now to Figure 2, will describe a fixing member of the primary and secondary insulating barriers to the carrier structure. A fastener comprises a bushing 22 whose base is welded to the supporting structure 1 in a position corresponding to a clearance at the corners of four adjacent secondary insulating boxes 6. The bushing 22 carries a first rod 23 screwed to it. The rod 23 passes between the adjacent boxes 6. The spaces Interlayers between the boxes 6 are filled with a glass wool stuffing to ensure the continuity of the secondary insulating barrier. A metal support plate 24 is mounted on the rod 23 to clamp the cleats 9 against the supporting structure 1 by means of a not shown nut. A piece of plywood 25 is mounted on plate 24 so as to serve as a spacer between the plate 24 and an upper plate 26 and to reduce the thermal bridge to the supporting structure. The wooden part 25 comprises a housing 28 for receiving the threaded end of the rod 23 and its nut, and two holes to be traversed by not shown fastening screws. The head of each fixing screw abuts in a countersink 27 provided in the upper plate 26. The height of this arrangement is determined so that the upper plate 26 comes to be flush at the level of the top panels 8 of the secondary insulating boxes 6.
La platine supérieure 26 comporte, en outre, un alésage fileté central 29 destiné à recevoir une embase filetée 30 d'un raccord 31. En service, l'embase filetée 30 traverse également un perçage ménagé à travers une virure 17 de la barrière d'étanchéité secondaire. Le raccord 31 comporte une collerette 32 qui est soudée à sa périphérie sur virure 11 autour du perçage pour refaire l'étanchéité de la barrière d'étanchéité secondaire. Le raccord 31 se prolonge par une tige supérieure 33 sur laquelle on visse un écrou supérieur 34 pour assurer le serrage d'une plaquette métallique 35 sur les tasseaux 21 des caissons isolants primaires 13. Une ou plusieurs rondelles 36 peuvent également être intercalées entre l'écrou supérieur 34 et la plaquette 35. Ici aussi, l'espace intercalaire entre les faces munies des tasseaux 21 des caissons isolants primaires 13 est remplie d'un rembourrage en laine de verre pour assurer la continuité de la barrière isolante primaire.  The upper platen 26 further comprises a central threaded bore 29 for receiving a threaded base 30 of a connector 31. In use, the threaded base 30 also passes through a bore formed through a strake 17 of the barrier of FIG. secondary sealing. The coupling 31 comprises a flange 32 which is welded at its periphery to the strake 11 around the bore to re-seal the secondary sealing barrier. The connection 31 is extended by an upper rod 33 on which is screwed an upper nut 34 to ensure the clamping of a metal plate 35 on the cleats 21 of the primary insulating boxes 13. One or more washers 36 may also be inserted between the upper nut 34 and the plate 35. Here again, the intermediate space between the faces provided with the cleats 21 of the primary insulating boxes 13 is filled with a glass wool padding to ensure the continuity of the primary insulating barrier.
Sur la figure 3 on a représenté un autre détail de la barrière d'isolation primaire, toujours dans la zone d'un organe de fixation à l'interface entre quatre caissons isolants primaires 13. Seulement deux caissons 13 sont représentés partiellement pour la clarté de la représentation, les deux autres étant symétriques.  FIG. 3 shows another detail of the primary insulation barrier, still in the area of a fastener at the interface between four primary insulating caissons 13. Only two caissons 13 are shown partially for the sake of clarity. the representation, the two others being symmetrical.
Comme visible, sur les deux côtés parallèles les plus courts du caisson 13, le panneau de fond 40 et le panneau de couvercle 14 font saillie par rapport au voile latéral 45 du caisson. Le panneau de couvercle 14 est constitué de deux planches superposées 46 et 47. Au niveau du coin du caisson 13, une découpe rectangulaire 48 est réalisée dans la planche inférieure 47 et une découpe rectangulaire 49 de plus grande taille est réalisée dans la planche supérieure 46. Ainsi sont formés une fenêtre rectangulaire 50 centrée sur l'organe de fixation qui permet d'avoir accès à l'écrou 34 lorsque les quatre caissons 13 sont positionnés sur la membrane étanche secondaire, et un lamage rectangulaire 51 entourant les quatre côtés de la fenêtre 50. Le lamage 51 sert à positionner et retenir une plaque de fermeture 52 de même épaisseur que la planche supérieure 46. La plaque de fermeture 52 sert à compléter la surface supérieure de la barrière isolante primaire 4 après que l'écrou 34 est correctement serré. Ainsi on obtient une surface d'appui sensiblement uniforme pour recevoir la barrière étanche primaire 5. Du fait que le lamage 51 découvre la surface supérieure de la planche inférieure 47 le long des quatre côtés de la fenêtre 50, le maintien de la plaque de fermeture 52 est solide et stable. As visible, on the two shorter parallel sides of the casing 13, the bottom panel 40 and the cover panel 14 protrude from the veil lateral 45 of the box. The cover panel 14 consists of two superposed boards 46 and 47. At the corner of the box 13, a rectangular cutout 48 is made in the lower board 47 and a rectangular cutout 49 of larger size is made in the upper board 46 Thus are formed a rectangular window 50 centered on the fixing member which makes it possible to have access to the nut 34 when the four boxes 13 are positioned on the secondary waterproof membrane, and a rectangular counterbore 51 surrounding the four sides of the window 50. The counterbore 51 serves to position and retain a closure plate 52 of the same thickness as the upper board 46. The closure plate 52 serves to complete the upper surface of the primary insulating barrier 4 after the nut 34 is correctly tight. Thus, a substantially uniform bearing surface is obtained for receiving the primary watertight barrier 5. Because the counterbore 51 discovers the upper surface of the lower plank 47 along the four sides of the window 50, maintaining the closure plate 52 is solid and stable.
Sur la figure 3, le trait 53 représente l'arête supérieure du voile latéral 45, qui se trouve sous le lamage 51et soutient ainsi la planche inférieure 47 au niveau du côté long de ce lamage. De ce fait, la plaque de fermeture 52 est maintenue fermement et de manière encore plus résistante à la pression régnant dans la cuve en service.  In FIG. 3, the line 53 represents the upper edge of the lateral web 45, which lies under the counterbore 51 and thus supports the lower plate 47 at the long side of this counterbore. As a result, the closure plate 52 is held firmly and even more resistant to the pressure in the tank in use.
Les techniques décrites ci-dessus pour réaliser une paroi étanche et isolée peuvent être utilisées dans différents types de réservoirs, par exemple pour constituer la paroi d'un réservoir de GNL dans une installation terrestre ou dans un ouvrage flottant comme un navire méthanier ou autre.  The techniques described above for making a sealed and insulated wall can be used in different types of tanks, for example to form the wall of an LNG tank in a land installation or in a floating structure such as a LNG tank or other.
En référence à la figure 4, une vue écorchée d'un navire méthanier 70 montre une cuve étanche et isolée 71 de forme générale prismatique montée dans la double coque 72 du navire. La paroi de la cuve 71 comporte une barrière étanche primaire destinée à être en contact avec le GNL contenu dans la cuve, une barrière étanche secondaire agencée entre la barrière étanche primaire et la double coque 72 du navire, et deux barrières isolante agencées respectivement entre la barrière étanche primaire et la barrière étanche secondaire et entre la barrière étanche secondaire et la double coque 72. Referring to Figure 4, a broken view of a LNG tank 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 sealed barrier intended to be in contact with the LNG contained in the tank, a secondary sealed barrier arranged between the primary waterproof barrier and the double hull 72 of the ship, and two insulating barriers arranged respectively between the fence Primary watertight and secondary watertight barrier and between secondary watertight barrier and double hull 72.
De manière connue en soi, des canalisations de chargement/déchargement 73 disposées sur le pont supérieur du navire peuvent être raccordées, au moyen de connecteurs appropriées, à un terminal maritime ou portuaire pour transférer une cargaison de GNL depuis ou vers la cuve 71.  In a manner known per se, loading / unloading lines 73 arranged on the upper deck of the ship can be connected, by means of appropriate connectors, to a marine or port terminal to transfer a cargo of LNG from or to the tank 71.
La figure 4 représente un exemple de terminal maritime comportant un poste de chargement et de déchargement 75, une conduite sous-marine 76 et une installation à terre 77. Le poste de chargement et de déchargement 75 est une installation fixe off-shore comportant un bras mobile 74 et une tour 78 qui supporte le bras mobile 74. Le bras mobile 74 porte un faisceau de tuyaux flexibles isolés 79 pouvant se connecter aux canalisations de chargement/déchargement 73. Le bras mobile 74 orientable s'adapte à tous les gabarits de méthaniers. Une conduite de liaison non représentée s'étend à l'intérieur de la tour 78. Le poste de chargement et de déchargement 75 permet le chargement et le déchargement du méthanier 70 depuis ou vers l'installation à terre 77. Celle-ci comporte des cuves de stockage de gaz liquéfié 80 et des conduites de liaison 81 reliées par la conduite sous-marine 76 au poste de chargement ou de déchargement 75. La conduite sous-marine 76 permet le transfert du gaz liquéfié entre le poste de chargement ou de déchargement 75 et l'installation à terre 77 sur une grande distance, par exemple 5 km, ce qui permet de garder le navire méthanier 70 à grande distance de la côte pendant les opérations de chargement et de déchargement.  FIG. 4 represents an example of a marine terminal comprising a loading and unloading station 75, an underwater pipe 76 and an onshore installation 77. The loading and unloading station 75 is an off-shore fixed installation comprising an arm mobile 74 and a tower 78 which supports the movable arm 74. The movable arm 74 carries a bundle of insulated flexible pipes 79 that can connect to the loading / unloading pipes 73. The movable arm 74 can be adapted to all gauges of LNG carriers . A connection pipe (not shown) extends inside the tower 78. The loading and unloading station 75 enables the loading and unloading of the LNG tank 70 from or to the shore facility 77. liquefied gas storage tanks 80 and connecting lines 81 connected by the underwater line 76 to the loading or unloading station 75. The underwater line 76 allows the transfer of the liquefied gas between the loading or unloading station 75 and the onshore installation 77 over a large distance, for example 5 km, which makes it possible to keep the tanker vessel 70 at great distance from the coast during the loading and unloading operations.
Pour engendrer la pression nécessaire au transfert du gaz liquéfié, on met en oeuvre des pompes embarquées dans le navire 70 et/ou des pompes équipant l'installation à terre 77 et/ou des pompes équipant le poste de chargement et de déchargement 75.  In order to generate the pressure necessary for the transfer of the liquefied gas, pumps on board the ship 70 and / or pumps equipping the shore installation 77 and / or pumps equipping the loading and unloading station 75 are used.
Bien que l'invention ait été décrite en liaison avec plusieurs modes de réalisation particuliers, il est bien évident qu'elle n'y est nullement limitée et qu'elle comprend tous les équivalents techniques des moyens décrits ainsi que leurs combinaisons si celles-ci entrent dans le cadre de l'invention. L'usage du verbe « comporter », « comprendre » ou « inclure » et de ses formes conjuguées n'exclut pas la présence d'autres éléments ou d'autres étapes que ceux énoncés dans une revendication. L'usage de l'article indéfini « un » ou « une » pour un élément ou une étape n'exclut pas, sauf mention contraire, la présence d'une pluralité de tels éléments ou étapes. Although the invention has been described in connection with several particular embodiments, it is obvious that it is not limited thereto and that it comprises all the technical equivalents of the means described and their combinations if they are within the scope of the invention. The use of the verb "to include", "to understand" or "to include" and its conjugated forms does not exclude the presence of other elements or steps other than those set out in a claim. The use of the indefinite article "a" or "an" for an element or a step does not exclude, unless otherwise stated, the presence of a plurality of such elements or steps.
Dans les revendications, tout signe de référence entre parenthèses ne saurait être interprété comme une limitation de la revendication.  In the claims, any reference sign in parentheses can not be interpreted as a limitation of the claim.

Claims

REVENDICATIONS
1. Cuve étanche et thermiquement isolante agencée dans une structure porteuse pour contenir un fluide,  1. Sealed and thermally insulating vessel arranged in a supporting structure for containing a fluid,
dans laquelle une paroi de la cuve comporte au moins une barrière isolante (4) et au moins une membrane étanche (5) retenue sur la barrière isolante, in which a wall of the tank comprises at least one insulating barrier (4) and at least one impervious membrane (5) retained on the insulating barrier,
dans laquelle la barrière isolante (4) est constituée par un ensemble d'éléments calorifuges (13) sensiblement parallélépipédiques comportant à chaque fois un panneau de couvercle (14) plan, le panneau de couvercle d'un élément calorifuge présentant une forme globale rectangulaire et comportant au moins deux côtés opposés qui font saillie par rapport aux parois latérales (45) correspondantes de l'élément calorifuge, les coins du panneau de couvercle de l'élément calorifuge comportant à chaque fois une découpe (50, 51) ménagée dans la partie saillante du panneau de couvercle, in which the insulating barrier (4) is constituted by a plurality of substantially parallelepipedal heat-insulating elements (13) each comprising a flat cover panel (14), the cover panel of a heat-insulating element having a rectangular overall shape and having at least two opposite sides protruding from the corresponding side walls (45) of the heat-insulating element, the corners of the cover panel of the heat-insulating element having in each case a cut-out (50, 51) in the part protruding from the cover panel,
dans laquelle les éléments calorifuges (13) sont juxtaposés de manière que les côtés saillants des panneaux de couvercle soient sensiblement bord à bord, la surface supérieure des panneaux de couvercle formant une surface d'appui plane sensiblement continue pour la membrane étanche (5), un dégagement étant ménagé à chaque fois entre les parois latérales (45) des éléments calorifuges au droit des côtés saillants des panneaux de couvercle, wherein the heat-insulating elements (13) are juxtaposed so that the projecting sides of the cover panels are substantially edge-to-edge, the upper surface of the cover panels forming a substantially continuous planar bearing surface for the waterproof membrane (5), a clearance being provided each time between the side walls (45) of the heat-insulating elements to the right of the projecting sides of the cover panels,
un organe de retenue (31-36) directement ou indirectement solidaire de la structure porteuse (1) étant agencé au niveau des coins adjacents de quatre éléments calorifuges (13) adjacents dans le dégagement entre les parois latérales et coopérant avec des pièces de bord (21) des quatre éléments calorifuges pour retenir les quatre éléments calorifuges de la barrière isolante directement ou indirectement contre la structure porteuse, a retaining member (31-36) directly or indirectly integral with the supporting structure (1) being arranged at the adjacent corners of four adjacent heat-insulating elements (13) in the clearance between the side walls and cooperating with edge pieces ( 21) of the four heat-insulating elements to retain the four heat-insulating elements of the insulating barrier directly or indirectly against the supporting structure,
les découpes des coins adjacents des quatre éléments calorifuges délimitant une fenêtre (50) à travers la surface d'appui pour donner accès à l'organe de retenue, une plaque de fermeture (52) étant disposée dans la fenêtre au droit de l'organe de retenue (31-36) pour compléter la surface d'appui plane sensiblement continue, caractérisée par le fait que la découpe du coin d'un panneau de couvercle est à chaque fois bordée d'un rebord plan (51) ménagé dans l'épaisseur du panneau de couvercle (14) et parallèle à la surface supérieure du panneau de couvercle, la plaque de fermeture (52) étant reçue en appui sur les rebords plans (51) des coins adjacents des quatre éléments calorifuges (13). the cutouts of the adjacent corners of the four heat-insulating elements delimiting a window (50) through the support surface to give access to the retaining member, a closure plate (52) being arranged in the window in line with the organ retaining means (31-36) for completing the substantially continuous planar bearing surface, characterized in that the cut-out of the corner of a cover panel is each edged with a plane edge (51) formed in the thickness of the cover panel (14) and parallel to the upper surface of the cover panel , the closure plate (52) being received in abutment on the plane edges (51) of the adjacent corners of the four heat insulating elements (13).
2. Cuve selon la revendication 1, dans laquelle les rebords plans (51) des coins adjacents des quatre éléments calorifuges entourent complètement la fenêtre (50) pour soutenir une partie de bord de la plaque de fermeture sur toute la périphérie de la plaque de fermeture (52).  A vessel according to claim 1, wherein the plane flanges (51) of the adjacent corners of the four heat insulating elements completely surround the window (50) to support an edge portion of the closure plate over the entire periphery of the closure plate. (52).
3. Cuve selon la revendication 2, dans laquelle la découpe (50) du coin d'un panneau de couvercle présente une forme de coin rentrant, le rebord plan (51) comportant une bande plane en forme de L longeant deux côtés du coin rentrant (50).  3. A vessel according to claim 2, wherein the cutout (50) of the corner of a cover panel has a re-entrant wedge shape, the planar flange (51) having an L-shaped flat strip along two sides of the re-entrant corner. (50).
4. Cuve selon l'une des revendications 1 à 3, dans laquelle la pièce de bord d'un élément calorifuge comporte un tasseau (21) fixé sur un panneau de fond (40) de l'élément calorifuge au niveau d'un rebord du panneau de fond faisant saillie par rapport à la paroi latérale (45).  4. Tank according to one of claims 1 to 3, wherein the edge piece of a heat insulating element comprises a cleat (21) fixed on a bottom panel (40) of the heat insulating element at a rim. the bottom panel projecting from the side wall (45).
5. Cuve selon l'une des revendications 1 à 4, dans laquelle un élément calorifuge (13) comporte à chaque fois une caisse comportant un panneau de fond (40) parallèle au panneau de couvercle (14) et espacé de celui-ci et des voiles latéraux (45) agencés entre le panneau de fond et le panneau de couvercle pour délimiter un espace intérieur de la caisse rempli d'une garniture isolante, les voiles latéraux formant les parois latérales de l'élément calorifuge, le voile latéral (45, 53) parallèle à un côté saillant du panneau de couvercle présentant deux portions d'extrémités agencées à chaque au droit du rebord plan (51) d'un coin du panneau de couvercle (14).  5. Tank according to one of claims 1 to 4, wherein a heat-insulating element (13) comprises each time a box having a bottom panel (40) parallel to the cover panel (14) and spaced therefrom and lateral sails (45) arranged between the bottom panel and the cover panel to delimit an interior space of the box filled with an insulating lining, the lateral sails forming the side walls of the heat-insulating element, the lateral web (45 , 53) parallel to a protruding side of the cover panel having two end portions arranged at each to the right of the flat rim (51) of a corner of the cover panel (14).
6. Cuve selon l'une des revendications 1 à 5, dans laquelle le panneau de couvercle (14) d'un élément calorifuge comporte deux planches de contreplaqué superposées, la planche supérieure (46) comportant une découpe (51) plus étendue que la planche inférieure (47), de manière à découvrir des portions de la surface supérieure de la planche inférieure du panneau de couvercle au niveau des coins, les portions découvertes constituant les rebords plans (51) recevant la plaque de fermeture (52). 6. Tank according to one of claims 1 to 5, wherein the cover panel (14) of a heat insulating element comprises two superimposed plywood planks, the upper plank (46) having a larger cutout (51). the lower board (47) so as to discover portions of the upper surface of the bottom board of the cover panel at the corners, the exposed portions constituting the flat edges (51) receiving the closure plate (52).
7. Navire (70) pour le transport d'un produit liquide froid, le navire comportant une double coque (72) et une cuve (71) selon l'une des revendications 1 à 6 disposée dans la double coque.  7. Ship (70) for the transport of a cold liquid product, the vessel having a double hull (72) and a tank (71) according to one of claims 1 to 6 disposed in the double hull.
8. Procédé de chargement ou déchargement d'un navire (70) selon la revendication 7, dans lequel on achemine un produit liquide froid à travers des canalisations isolées (73, 79, 76, 81) depuis ou vers une installation de stockage flottante ou terrestre (77) vers ou depuis la cuve du navire (71).  A method of loading or unloading a vessel (70) according to claim 7, wherein a cold liquid product is conveyed through insulated ducts (73, 79, 76, 81) to or from a floating storage facility or earth (77) to or from the vessel (71).
9. Système de transfert pour un produit liquide froid, le système comportant un navire (70) selon la revendication 7, des canalisations isolées (73, 79, 76, 81) agencées de manière à relier la cuve (71) installée dans la coque du navire à une installation de stockage flottante ou terrestre (77) et une pompe pour entraîner un flux de produit liquide froid à travers les canalisations isolées depuis ou vers l'installation de stockage flottante ou terrestre vers ou depuis la cuve du navire.  9. Transfer system for a cold liquid product, the system comprising a ship (70) according to claim 7, insulated pipes (73, 79, 76, 81) arranged to connect the tank (71) installed in the hull. the vessel to a floating or land storage facility (77) and a pump for driving a flow of cold liquid product through the insulated pipelines from or to the floating or land storage facility to or from the vessel vessel.
10. Elément calorifuge (13) sensiblement parallélépipédique convenant pour la réalisation d'une barrière isolante dans une paroi de cuve, l'élément calorifuge comportant un panneau de couvercle (14) plan présentant une forme globale rectangulaire, le panneau de couvercle (14) comportant au moins deux côtés opposés qui font saillie par rapport aux parois latérales (45) correspondantes de l'élément calorifuge, les coins du panneau de couvercle de l'élément calorifuge comportant à chaque fois une découpe (50, 51) ménagée dans la partie saillante du panneau de couvercle,  10. Substantially parallelepipedal heat-insulating element (13) suitable for producing an insulating barrier in a tank wall, the heat-insulating element comprising a flat cover panel (14) having a rectangular overall shape, the cover panel (14) having at least two opposite sides protruding from the corresponding side walls (45) of the heat-insulating element, the corners of the cover panel of the heat-insulating element having in each case a cut-out (50, 51) in the part protruding from the cover panel,
les parois latérales (45) correspondant aux deux côtés opposés de l'élément calorifuge (13) portant des pièces de bord (21) aptes à coopérer avec un organe de retenue, the side walls (45) corresponding to the two opposite sides of the heat-insulating element (13) carrying edge pieces (21) able to cooperate with a retaining member,
caractérisé par le fait que la découpe d'un coin du panneau de couvercle est à chaque fois bordée d'un rebord plan (51) ménagé dans l'épaisseur du panneau de couvercle (14) et parallèle à la surface supérieure du panneau de couvercle, l'élément calorifuge (13) étant apte à être juxtaposé avec trois autres éléments calorifuges (13) identiques adjacents au niveau d'un coin, de manière que les découpes des coins adjacents des quatre éléments calorifuges délimitent une fenêtre (50) à travers la surface des panneaux de couvercle au droit des pièces de bord (21) des quatre éléments calorifuges, characterized in that the cut of a corner of the cover panel is each edged with a plane flange (51) formed in the thickness of the panel of cover (14) and parallel to the upper surface of the cover panel, the heat-insulating element (13) being adapted to be juxtaposed with three other identical heat-insulating elements (13) adjacent at a corner, so that the cuts of the adjacent corners of the four heat-insulating elements delimit a window (50) through the surface of the cover panels to the right of the edge pieces (21) of the four heat-insulating elements,
les rebords plans des coins adjacents des quatre éléments calorifuges étant aptes à recevoir une plaque de fermeture (52) plane fermant ladite fenêtre (50). the plane edges of the adjacent corners of the four heat insulating elements being able to receive a flat closing plate (52) closing said window (50).
PCT/FR2012/050382 2011-03-23 2012-02-23 Insulating element for a sealed and thermally insulating tank wall WO2012127141A1 (en)

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CN201280014712.8A CN103492784B (en) 2011-03-23 2012-02-23 A kind of insulation component for sealing heat-insulated container wall
AU2012230164A AU2012230164B2 (en) 2011-03-23 2012-02-23 Insulating element for a sealed and thermally insulating tank wall
KR1020137026088A KR101997936B1 (en) 2011-03-23 2012-02-23 Insulating element for a sealed and thermally insulating tank wall

Applications Claiming Priority (2)

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FR1152339A FR2973097B1 (en) 2011-03-23 2011-03-23 CALORIFYING ELEMENT FOR WATERPROOF AND THERMALLY INSULATING TANK WALL
FR1152339 2011-03-23

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KR102513006B1 (en) 2016-08-17 2023-03-22 대우조선해양 주식회사 Plug install structure of insulation storage tank
KR102626182B1 (en) * 2019-07-23 2024-01-18 한화오션 주식회사 Insulation Panel Securing Device of Liquefied Natural Gas Storage Tank
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KR101997936B1 (en) 2019-07-08
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AU2012230164B2 (en) 2017-07-06
CN103492784A (en) 2014-01-01

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