EP2419671A1 - Stopper for a secondary diaphragm of an lng vat - Google Patents

Stopper for a secondary diaphragm of an lng vat

Info

Publication number
EP2419671A1
EP2419671A1 EP10715919A EP10715919A EP2419671A1 EP 2419671 A1 EP2419671 A1 EP 2419671A1 EP 10715919 A EP10715919 A EP 10715919A EP 10715919 A EP10715919 A EP 10715919A EP 2419671 A1 EP2419671 A1 EP 2419671A1
Authority
EP
European Patent Office
Prior art keywords
watertight
tank
barrier
web
metal plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP10715919A
Other languages
German (de)
French (fr)
Other versions
EP2419671B1 (en
EP2419671B3 (en
Inventor
Adnan Ezzarhouni
Lucas Troncy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gaztransport et Technigaz SA
Original Assignee
Gaztransport et Technigaz SA
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 SA filed Critical Gaztransport et Technigaz SA
Priority to PL10715919T priority Critical patent/PL2419671T6/en
Publication of EP2419671A1 publication Critical patent/EP2419671A1/en
Publication of EP2419671B1 publication Critical patent/EP2419671B1/en
Priority to HRP20160092TT priority patent/HRP20160092T4/en
Application granted granted Critical
Publication of EP2419671B3 publication Critical patent/EP2419671B3/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • 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
    • F17C3/022—Land-based bulk storage containers
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • F17C2203/0626—Multiple walls
    • F17C2203/0629—Two walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • 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
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/22—Assembling processes
    • F17C2209/228—Assembling processes by screws, bolts or rivets
    • 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
    • F17C2209/23—Manufacturing of particular parts or at special locations
    • F17C2209/232—Manufacturing of particular parts or at special locations of 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
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/23—Manufacturing of particular parts or at special locations
    • F17C2209/234—Manufacturing of particular parts or at special locations of closing end pieces, e.g. caps
    • 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
    • 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 present invention relates to the production of sealed and thermally insulated tanks integrated into a supporting structure. State of the art
  • the primary thermally insulating barrier, the secondary sealing barrier and the secondary thermal insulating barrier are essentially constituted by a set of prefabricated panels fixed on the supporting structure.
  • Each prefabricated panel is formed, in the first place, of a first rigid plate carrying a layer of thermal insulation and constituting with it a secondary thermally insulating barrier element, secondly, a flexible or rigid sheet adhering substantially to any the surface of the thermal insulating layer of the aforementioned secondary thermal insulating barrier element, said ply forming a secondary sealing barrier element, thirdly, a second thermal insulating layer, which partially overlaps the said web and adhering thereto and, fourthly, a second rigid plate covering the second layer of thermal insulation and constituting with it a primary thermally insulating barrier element.
  • the secondary sealing barrier In an area located at the top of the vertical walls of the tank, the secondary sealing barrier is connected to the supporting structure. This zone called “stop zone of the secondary membrane" is not described in the aforementioned documents.
  • Figure 1 shows, in section, the stopping zone of the secondary membrane of a tank of the prior art.
  • the supporting structure 1 is constituted by the double hull of a ship. It includes a pan vertical 2 and a horizontal pan 3.
  • An L-shaped plate 4 is welded to the horizontal pan 3 and extends downwards.
  • prefabricated panels are attached to the vertical pan 2 to form the primary heat-insulating barrier, the secondary sealing barrier and the secondary heat-insulating barrier.
  • the layer 5 of insulating material and the water table 6 of the prefabricated panel located higher.
  • the ply 6 In the stopping zone of the secondary membrane, the ply 6 must be sealingly connected to the supporting structure 1. This is achieved by a flexible ply 7 which is, on the one hand, bonded to the ply 6 of the prefabricated panel and on the other hand, glued to the L-shaped plate 4. The gluing of the ply 7 to the L-shaped plate 4 is carried out, and two layers of putty 8 are provided, as shown in more detail in FIG. Veneer beam 9 is bolted to the L-shaped plate 4.
  • This closure system of the secondary membrane has several disadvantages.
  • a problem that the present invention proposes to solve is to provide a vessel that does not exhibit at least some of the aforementioned drawbacks of the prior art.
  • an object of the invention is to provide a tank in which the secondary sealed barrier can be connected more easily to the carrier structure.
  • Another object of the invention is to make it possible to automate and make reliable as much as possible the manufacture of the tank.
  • the solution proposed by the invention is a tank for liquefied natural gas, comprising a bearing structure and a sealed and thermally insulated tank intended to contain liquefied natural gas, said vessel comprising a plurality of vessel walls attached to said carrier structure, each vessel wall having successively, in the thickness direction from the inside to the outside of said vessel, a primary watertight barrier, a primary heat-insulating barrier, a secondary watertight barrier and a secondary thermally insulating barrier, said tank walls comprising at least one vertical wall, the secondary sealed barrier of said vertical wall comprising a first watertight sheet located at the top of said wall and a connecting device sealingly connecting said first web sealed to said supporting structure, characterized in that said connecting device comprises a first metal plate parallel to said first watertight web, a third watertight web bonded to said first metal plate, and a second watertight web adhered, on the one hand, to said first layer sealed and on the other hand to said third watertight web.
  • the second watertight web can be glued directly to
  • This tank can be for example a ship or a land tank.
  • the second watertight layer is bonded respectively to two parallel surfaces. This bonding can therefore be achieved easily, automatically and reliably.
  • the bonding of the first waterproof ply can be done before installation in the tank, in the workshop.
  • the first plate being metallic, it can be connected to the supporting structure, directly or indirectly, by continuous welding. This continuous welding can also be done easily, automatically and reliably.
  • the invention avoids the use of layers of mastic.
  • the bonding of the second sheet does not require a highly qualified and experienced workforce.
  • said second watertight web is flexible and has a non-sized area between the first watertight web and the third watertight web.
  • said first metal plate is welded to a metal part connected to the supporting structure.
  • said metal part has a vertical part and a horizontal part, the first metal plate being welded to the vertical part, the horizontal part being connected to the supporting structure.
  • the length of the horizontal part allows adjustment of the position of the vertical part, during the installation of the metal part.
  • the vertical part, on which is glued the third waterproof ply is positioned so that the first and the third ply are located in the same plane. This makes it even easier to glue.
  • said first watertight web is glued on a layer of insulating material or on a plywood plate forming part of the secondary thermally insulating barrier.
  • said support structure comprises vertical concrete wall panels, installed on the ground.
  • said support structure comprises the double shell of a floating structure.
  • FIG. 1 is a sectional view of a tank of the prior art, at the stop zone of the secondary membrane,
  • FIG. 2 represents a detail of FIG.
  • FIG. 3 is a sectional view of a tank according to one embodiment of the invention, at the stop zone of the secondary membrane, FIGS. 4 and 5 show details of FIG. 3,
  • FIG. 6 is a perspective view of the stopping zone of the secondary cell membrane of FIG. 3, at a corner,
  • FIGS. 7 and 8 show a bracket arranged in the corner of FIG. 6,
  • FIG. 9 is a view similar to FIG. 6, where certain elements have been removed,
  • FIG. 10 is a sectional view of a tank according to another embodiment of the invention, at the stop zone of the secondary membrane,
  • FIGS. 11 and 12 show details of FIG. 10,
  • FIG. 13 is a perspective view of the stopping zone of the secondary cell membrane of Figure 10, at a corner.
  • FIGS 3 to 9 relate to a tank according to a first embodiment of the invention.
  • the vessel has a plurality of vessel walls and is integrated into a carrier structure 11.
  • the carrier structure 11 may be the double hull of a ship or other type of floating structure.
  • each tank wall has successively, in the thickness direction from the inside to the outside of the tank, a primary watertight barrier, a primary heat-insulating barrier, a secondary watertight barrier and a thermally insulating barrier. secondary.
  • the primary thermally insulating barrier, the secondary sealed barrier and the secondary thermal insulating barrier essentially consist of a set of prefabricated panels fixed on the supporting structure 11.
  • the watertight barrier secondary is constituted by an assembly of waterproof plies.
  • Each sheet consists of a composite material whose two outer layers are glass fiber fabrics and whose intermediate layer is a deformable thin aluminum sheet of about 0.1 mm thick.
  • the sheet may be rigid or flexible.
  • Each prefabricated panel therefore comprises, inter alia, a rigid sheet bonded to a layer of thermally insulating material.
  • strips of flexible ply connect the adjacent rigid plies.
  • the secondary watertight barrier also called secondary membrane
  • Figure 3 shows, in section, this area called the stopping zone of the secondary membrane.
  • Figures 4 and 5 show details of Figure 3.
  • the carrying structure 11 comprises a vertical pan 12 and a horizontal pan 13.
  • An L-shaped plate 14 is welded to the horizontal pan 13.
  • the plate 14 has a vertical part 27 which extends downwards, parallel to the vertical pan 12, and a horizontal part 28 located at the lower end of the vertical part 27 and extending at a distance from the vertical pan 12.
  • a fixing bracket 20 is fixed under the horizontal part 28.
  • a U-shaped stirrup 21 is fixed to the plate 14 and to the bracket 20. More precisely, the stirrup 21 has two parallel branches 30 connected by a wall 29 perpendicular to the branches 30. The branches 30 are respectively fixed to the horizontal part 28 of plate 14 and the bracket 20. It can be noted on the one hand, that the carrier structure 11 and the plate 14 have the same shape as in the prior art of Figure 1. In other words, the invention does not require not to modify the forms of support structures usually used. On the other hand, the fixing of the bracket 20 and the stirrup 21 can be easily achieved by continuous welding, in an automated and reliable manner.
  • FIGS. 3 to 5 show a layer 15 of thermally insulating material of a prefabricated panel located at the top of the wall.
  • This layer 15 is covered by a rigid ply 16, except at an upper edge.
  • the layer 15 is thinner and the panel has a recessed face 24 in which is formed a horizontal groove.
  • the face 24 is situated substantially in the same plane as the wall 29 of the stirrup 21, which is possible because the geometry of the stirrup 21 makes it possible, when it is fixed, to adjust the position of the wall 29.
  • metal plate 22 is welded to the wall 29 of the yoke and extends downward, covering the face 24 to the groove 25. At its lower end, the plate 22 has a rim 26 folded in the groove 25 A strip of rigid ply 23 is glued to the plate 22.
  • a flexible strip of ply 17 is bonded, on the one hand, to the ply 16 and, on the other hand, to the ply 23.
  • An unsized zone is located between plies 16 and 23.
  • this bonding is performed respectively on two parallel surfaces, on which there are rigid webs. This bonding can therefore be achieved easily, automatically and reliably.
  • the above structure makes it possible to connect in a leaktight manner the ply 16 of the prefabricated panel to the supporting structure 11, via the flexible ply 17, possibly the rigid ply 23, the plate 22, the stirrup 21 and of plate 14.
  • the flexibility of the web 17 allows the resumption of displacement imposed by the carrier structure 11 and the secondary thermal insulation to the secondary sealed barrier, leaving a non-bonded area between the web 23 and the web 16 .
  • Figure 6 shows, in perspective, a corner of the tank formed by two vertical walls. We can see, for each wall, some of the elements described above.
  • Figure 7 is similar to Figure 6 and shows a variant in which a bracket 31 is fixed in the corner, to maintain the flexible web 17 in place.
  • the flat gluing submits the gluing of the corner areas to a resultant of thermomechanical forces perpendicular to the bonding plane may cause the rupture of the glued joint by peeling.
  • a bracket 31 may be necessary or not.
  • Figure 8 shows the bracket 31 and its fixing bolts in more detail.
  • Figure 9 is similar to Figure 6, but the flexible web 17 has been removed to allow viewing of the underlying elements.
  • the rigid sheet 23 is present along the walls in the form of a flat strip.
  • a flat strip is manufactured from two layers of glass fabric arranged on either side of an aluminum foil, resined together and hot pressed during the polymerization of the resin.
  • the rigid ply 23 is in the form of an L-shaped strip.
  • Such a non-planar strip can be made by polymerizing the resin, under heat and under pressure, on a mold with the desired shape.
  • a flexible web 23 which, by its flexibility, can adapt to a corner area.
  • Figures 10 to 13 show a vessel according to a second embodiment of the invention.
  • the vessel has a plurality of vessel walls and is integrated into a carrier structure 111.
  • the carrier structure 111 comprises vertical wall sections of prestressed concrete.
  • the carrier structure 111 and the tank form a land tank for LNG.
  • a metal plate 114 is attached to the carrier structure 111.
  • the plate 114 is positioned during casting of the concrete.
  • a metal plate 120 is welded to the plate 114, and extends horizontally.
  • the primary thermally insulating barrier, the secondary sealed barrier and the secondary thermally insulating barrier of the vessel essentially consist of a set of prefabricated panels fixed on the supporting structure 111. It can be seen in particular on the Figure 11 that each upper prefabricated panel comprises a layer 115 of insulating material, covered by a plate 132 of plywood. The plate 132 is covered by a rigid ply 116, except at a lower thicker edge, where the plate 132 has a recessed face 124.
  • a metal plate 122 is screwed to the panel 132, on the face 124, leaving an uncoated area 133 adjacent the portion of the panel 132 covered by the web 116.
  • the plate 122 is partially covered by a rigid web 123.
  • a strip of flexible ply 117 is adhered, on the one hand, to ply 116 and, on the other hand, to ply 123.
  • An unsized zone is located between plies 116 and 123 It may be noted that this bonding is carried out respectively on two parallel surfaces, on which there are rigid plies. This bonding can therefore be achieved easily, automatically and reliably.
  • the plies 116 and 123 are located in the same plane, which further facilitates gluing. In a variant, there is no ply 123 and the ply strip 117 is stuck directly on the plate 122.
  • a metal angle 121 is welded, on the one hand, to the plate 120 and, on the other hand, to the plate 122. More precisely, the angle 121 has a horizontal wall 130 welded to the plate 120 and a vertical wall 129 welded to the plate 122.
  • the above structure makes it possible to seal the web 116 of the prefabricated panel to the carrier structure 111, via the ply 117, the rigid ply 123, the plate 122, the angle 121 and plates 120 and 114.
  • the bonding of the web 117 can be performed in an automated and reliable manner.
  • the welding of the angle 121 can be performed in an automated and reliable manner.
  • the geometry of the angle 121 allows a position adjustment to coincide with the position of the plate 122.
  • Figure 13 shows the stopping area of the secondary membrane in perspective. There can be seen a corner area 133 between two adjacent vertical walls. This angle is more open than in the case of the first embodiment so that the risk of peeling off is lower. However, depending on the dimensioning of the tank and the characteristics of the peel, one can optionally fix a clamping bracket, similarly to the bracket 31 of the first embodiment.
  • the flexible ply forms, in particular with the plate 22 or 122, a connection device sealingly connecting the ply of a prefabricated panel to the supporting structure.
  • a connecting device has been described in relation to a floating structure and the other with a terrestrial reservoir. The two connecting devices can however be used with a floating structure or a terrestrial reservoir.

Abstract

The invention relates to a liquefied natural gas tank, including a support structure (11) and a sealed and thermally insulated vat for containing liquefied natural gas, each wall of the vat having, in series in the direction of the thickness from the inside toward the outside of said vat, a primary sealed barrier, a primary thermally insulated barrier, a secondary sealed barrier and a secondary thermally insulated barrier, the secondary sealed barrier of a vertical wall including a first sealed layer located at the top of said wall and a connection device sealingly connecting said first sealed layer to said support structure, characterized in that said connection device includes a first metal plate (22) parallel to said first sealed layer, and a second sealed layer (17) which is adhered to said first sealed layer, as well as connected to said first metal plate.

Description

ARRÊT DE LA MEMBRANE SECONDAIRE D'UNE CUVE DE GNL Domaine technique de l'invention STOPPING THE SECONDARY MEMBRANE OF A LNG TANK Technical field of the invention
La présente invention se rapporte à la réalisation de cuves étanches et thermiquement isolées intégrées dans une structure porteuse. Etat de la techniqueThe present invention relates to the production of sealed and thermally insulated tanks integrated into a supporting structure. State of the art
Dans les demandes de brevet français n° FR 2 691 520 et n° FR 2 724 623, on a déjà proposé une cuve étanche et thermiquement isolée intégrée dans une structure porteuse constituée par la double coque d'un navire. Chaque paroi de la cuve présente, successivement depuis l'intérieur de la cuve vers la structure porteuse, une barrière d'étanchéité primaire au contact avec le produit contenu dans la cuve, une barrière thermiquement isolante primaire, une barrière d'étanchéité secondaire et une barrière thermiquement isolante secondaire.In French patent applications FR 2 691 520 and FR 2 724 623, it has already been proposed a sealed and thermally insulated tank integrated into a supporting structure formed by the double hull of a ship. Each wall of the tank has, successively from inside the tank towards the supporting structure, a primary sealing barrier in contact with the product contained in the tank, a primary heat-insulating barrier, a secondary sealing barrier and a secondary thermally insulating barrier.
La barrière thermiquement isolante primaire, la barrière d'étanchéité secondaire et la barrière thermiquement isolante secondaire sont essentiellement constituées par un ensemble de panneaux préfabriqués fixés sur la structure porteuse. Chaque panneau préfabriqué est formé, en premier lieu, d'une première plaque rigide portant une couche d'isolant thermique et constituant avec elle un élément de barrière thermiquement isolante secondaire, en deuxième lieu, d'une nappe souple ou rigide adhérant sensiblement sur toute la surface de la couche d'isolant thermique de l'élément de barrière thermiquement isolante secondaire précité, ladite nappe formant un élément de barrière d'étanchéité secondaire, en troisième lieu, d'une deuxième couche d'isolant thermique, qui recouvre partiellement la nappe précitée et qui y adhère et, en quatrième lieu, d'une deuxième plaque rigide recouvrant la deuxième couche d'isolant thermique et constituant avec elle un élément de barrière thermiquement isolante primaire.The primary thermally insulating barrier, the secondary sealing barrier and the secondary thermal insulating barrier are essentially constituted by a set of prefabricated panels fixed on the supporting structure. Each prefabricated panel is formed, in the first place, of a first rigid plate carrying a layer of thermal insulation and constituting with it a secondary thermally insulating barrier element, secondly, a flexible or rigid sheet adhering substantially to any the surface of the thermal insulating layer of the aforementioned secondary thermal insulating barrier element, said ply forming a secondary sealing barrier element, thirdly, a second thermal insulating layer, which partially overlaps the said web and adhering thereto and, fourthly, a second rigid plate covering the second layer of thermal insulation and constituting with it a primary thermally insulating barrier element.
Dans une zone située au sommet des parois verticales de la cuve, la barrière d'étanchéité secondaire est reliée à la structure porteuse. Cette zone appelée « zone d'arrêt de la membrane secondaire », n'est pas décrite dans les documents précités.In an area located at the top of the vertical walls of the tank, the secondary sealing barrier is connected to the supporting structure. This zone called "stop zone of the secondary membrane" is not described in the aforementioned documents.
La figure 1 représente, en coupe, la zone d'arrêt de la membrane secondaire d'une cuve de l'art antérieur. La structure porteuse 1 est constituée par la double coque d'un navire. Elle comprend un pan vertical 2 et un pan horizontal 3. Un plat en L 4 est soudé au pan horizontal 3 et s'étend vers le bas.Figure 1 shows, in section, the stopping zone of the secondary membrane of a tank of the prior art. The supporting structure 1 is constituted by the double hull of a ship. It includes a pan vertical 2 and a horizontal pan 3. An L-shaped plate 4 is welded to the horizontal pan 3 and extends downwards.
De manière connue, des panneaux préfabriqués (non représentés) sont fixés au pan vertical 2 pour former la barrière thermiquement isolante primaire, la barrière d'étanchéité secondaire et la barrière thermiquement isolante secondaire. Sur la figure 1, on peut voir la couche 5 de matériau isolant et la nappe 6 étanche du panneau préfabriqué situé le plus haut.In known manner, prefabricated panels (not shown) are attached to the vertical pan 2 to form the primary heat-insulating barrier, the secondary sealing barrier and the secondary heat-insulating barrier. In Figure 1, we can see the layer 5 of insulating material and the water table 6 of the prefabricated panel located higher.
Dans la zone d'arrêt de la membrane secondaire, la nappe 6 doit être reliée de manière étanche à la structure porteuse 1. Cela est réalisé par une nappe 7 souple qui est d'une part, collée sur la nappe 6 du panneau préfabriqué et, d'autre part, collée sur le plat en L 4. Le collage de la nappe 7 sur le plat en L 4 est réalisé, et deux couches de mastic 8 sont prévues, comme le montre de manière plus détaillée la figure 2. Une poutre 9 de placage est boulonnée au plat en L 4.In the stopping zone of the secondary membrane, the ply 6 must be sealingly connected to the supporting structure 1. This is achieved by a flexible ply 7 which is, on the one hand, bonded to the ply 6 of the prefabricated panel and on the other hand, glued to the L-shaped plate 4. The gluing of the ply 7 to the L-shaped plate 4 is carried out, and two layers of putty 8 are provided, as shown in more detail in FIG. Veneer beam 9 is bolted to the L-shaped plate 4.
Ce système de fermeture de la membrane secondaire présente plusieurs inconvénients.This closure system of the secondary membrane has several disadvantages.
D'une part, la jonction mécanique de la nappe 7 au plat en L 4 est compliquée à mettre en œuvre puisqu'elle nécessite, outre le collage de la nappe 7, l'application des deux couches de mastic 8 et le boulonnage de la poutre 9.On the one hand, the mechanical joining of the sheet 7 to the L-shaped plate 4 is complicated to implement since it requires, in addition to the bonding of the sheet 7, the application of the two layers of putty 8 and the bolting of the sheet. beam 9.
D'autre part, la faible surface encollée entre la nappe 7 et le plat en L 4 exige l'emploi d'une main d'œuvre hautement qualifiée et expérimentée pour mener à bien cette opération et garantir l'étanchéité au GNL sous forme gazeuse et liquide. Résumé de l'inventionOn the other hand, the small surface area bonded between the sheet 7 and the L-shaped plate 4 requires the use of a highly qualified and experienced workforce to carry out this operation and guarantee the gas-tightness of LNG. and liquid. Summary of the invention
Un problème que la présente invention propose de résoudre est de fournir une cuve qui ne présente pas au moins certains des inconvénients précités de l'art antérieur. En particulier, un but de l'invention est de fournir une cuve dans laquelle la barrière étanche secondaire peut être reliée plus facilement à la structure porteuse. Un autre but de l'invention est de permettre d'automatiser et de fiabiliser le plus possible la fabrication de la cuve.A problem that the present invention proposes to solve is to provide a vessel that does not exhibit at least some of the aforementioned drawbacks of the prior art. In particular, an object of the invention is to provide a tank in which the secondary sealed barrier can be connected more easily to the carrier structure. Another object of the invention is to make it possible to automate and make reliable as much as possible the manufacture of the tank.
La solution proposée par l'invention est un réservoir pour gaz naturel liquéfié, comprenant une structure porteuse et une cuve étanche et thermiquement isolée destinée à contenir du gaz naturel liquéfié, ladite cuve comprenant plusieurs parois de cuve fixées à ladite structure porteuse, chaque paroi de cuve présentant successivement, dans le sens de l'épaisseur depuis l'intérieur vers l'extérieur de ladite cuve, une barrière étanche primaire, une barrière thermiquement isolante primaire, une barrière étanche secondaire et une barrière thermiquement isolante secondaire, lesdites parois de cuve comprenant au moins une paroi verticale, la barrière étanche secondaire de ladite paroi verticale comprenant une première nappe étanche située au sommet de ladite paroi et un dispositif de liaison reliant, de manière étanche, ladite première nappe étanche à ladite structure porteuse, caractérisé par le fait que ledit dispositif de liaison comprend une première plaque métallique parallèle à ladite première nappe étanche, une troisième nappe étanche collée à ladite première plaque métallique, et une deuxième nappe étanche collée, d'une part, à ladite première nappe étanche et d'autre part à ladite troisième nappe étanche. En variante, la deuxième nappe étanche peut être collée directement sur la première plaque métallique.The solution proposed by the invention is a tank for liquefied natural gas, comprising a bearing structure and a sealed and thermally insulated tank intended to contain liquefied natural gas, said vessel comprising a plurality of vessel walls attached to said carrier structure, each vessel wall having successively, in the thickness direction from the inside to the outside of said vessel, a primary watertight barrier, a primary heat-insulating barrier, a secondary watertight barrier and a secondary thermally insulating barrier, said tank walls comprising at least one vertical wall, the secondary sealed barrier of said vertical wall comprising a first watertight sheet located at the top of said wall and a connecting device sealingly connecting said first web sealed to said supporting structure, characterized in that said connecting device comprises a first metal plate parallel to said first watertight web, a third watertight web bonded to said first metal plate, and a second watertight web adhered, on the one hand, to said first layer sealed and on the other hand to said third watertight web. Alternatively, the second watertight web can be glued directly to the first metal plate.
Ce réservoir peut être par exemple un navire ou un réservoir terrestre. Grâce aux caractéristiques précitées, la deuxième nappe étanche est collée respectivement sur deux surfaces parallèles. Ce collage peut donc être réalisé facilement, de manière automatisée et fiable. Le collage de la première nappe étanche peut être réalisé avant l'installation dans la cuve, en atelier. La première plaque étant métallique, elle peut être reliée à la structure porteuse, directement ou indirectement, par soudure continue. Cette soudure continue peut aussi être réalisée facilement, de manière automatisée et fiable. Ainsi, l'invention permet d'éviter l'utilisation de couches de mastic. De plus, le collage de la deuxième nappe ne nécessite pas une main d' œuvre très qualifiée et expérimentée.This tank can be for example a ship or a land tank. With the above characteristics, the second watertight layer is bonded respectively to two parallel surfaces. This bonding can therefore be achieved easily, automatically and reliably. The bonding of the first waterproof ply can be done before installation in the tank, in the workshop. The first plate being metallic, it can be connected to the supporting structure, directly or indirectly, by continuous welding. This continuous welding can also be done easily, automatically and reliably. Thus, the invention avoids the use of layers of mastic. In addition, the bonding of the second sheet does not require a highly qualified and experienced workforce.
De préférence, ladite deuxième nappe étanche est souple et présente une zone non encollée entre la première nappe étanche et la troisième nappe étanche.Preferably, said second watertight web is flexible and has a non-sized area between the first watertight web and the third watertight web.
La souplesse de la deuxième nappe et la zone non encollée permettent la reprise des déplacements imposés par la structure porteuse et l'isolation thermique secondaire à la barrière étanche secondaire. Avantageusement, ladite première plaque métallique est soudée à une pièce métallique reliée à la structure porteuse. De préférence, ladite pièce métallique présente une partie verticale et une partie horizontale, la première plaque métallique étant soudée à la partie verticale, la partie horizontale étant reliée à la structure porteuse.The flexibility of the second ply and the non-glued area allow the resumption of displacements imposed by the supporting structure and the thermal insulation secondary to the secondary watertight barrier. Advantageously, said first metal plate is welded to a metal part connected to the supporting structure. Preferably, said metal part has a vertical part and a horizontal part, the first metal plate being welded to the vertical part, the horizontal part being connected to the supporting structure.
La longueur de la partie horizontale permet un réglage de la position de la partie verticale, lors de l'installation de la pièce métallique.The length of the horizontal part allows adjustment of the position of the vertical part, during the installation of the metal part.
Cela permet d'ajuster la position de la partie verticale à la position de la première nappe. Selon un mode de réalisation, la partie verticale, sur laquelle est collée la troisième nappe étanche, est positionnée pour que la première et la troisième nappe soient situées dans le même plan. Cela facilite encore le collage.This makes it possible to adjust the position of the vertical part to the position of the first sheet. According to one embodiment, the vertical part, on which is glued the third waterproof ply, is positioned so that the first and the third ply are located in the same plane. This makes it even easier to glue.
Avantageusement, ladite première nappe étanche est collée sur une couche de matériau isolant ou sur une plaque de contreplaqué faisant partie de la barrière thermiquement isolante secondaire.Advantageously, said first watertight web is glued on a layer of insulating material or on a plywood plate forming part of the secondary thermally insulating barrier.
Selon un mode de réalisation, ladite structure porteuse comprend des pans de mur verticaux en béton, installés sur terre.According to one embodiment, said support structure comprises vertical concrete wall panels, installed on the ground.
Selon un autre mode de réalisation, ladite structure porteuse comprend la double coque d'un ouvrage flottant. Brève description des figuresAccording to another embodiment, said support structure comprises the double shell of a floating structure. Brief description of the figures
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. Sur ces dessins :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. On these drawings:
- la figure 1 est une vue en coupe d'une cuve de l'art antérieur, au niveau de la zone d'arrêt de la membrane secondaire,FIG. 1 is a sectional view of a tank of the prior art, at the stop zone of the secondary membrane,
- la figure 2 représente un détail de la figure 1,FIG. 2 represents a detail of FIG.
- la figure 3 est une vue en coupe d'une cuve selon un mode de réalisation de l'invention, au niveau de la zone d'arrêt de la membrane secondaire, - les figures 4 et 5 représentent des détails de la figure 3,FIG. 3 is a sectional view of a tank according to one embodiment of the invention, at the stop zone of the secondary membrane, FIGS. 4 and 5 show details of FIG. 3,
- la figure 6 est une vue en perspective de la zone d'arrêt de la membrane secondaire de cuve de la figure 3, au niveau d'un coin,FIG. 6 is a perspective view of the stopping zone of the secondary cell membrane of FIG. 3, at a corner,
- les figures 7 et 8 représentent une équerre agencée dans le coin de la figure 6, - la figure 9 est une vue similaire à la figure 6, où certains éléments ont été retirés,FIGS. 7 and 8 show a bracket arranged in the corner of FIG. 6, FIG. 9 is a view similar to FIG. 6, where certain elements have been removed,
- la figure 10 est une vue en coupe d'une cuve selon un autre mode de réalisation de l'invention, au niveau de la zone d'arrêt de la membrane secondaire,FIG. 10 is a sectional view of a tank according to another embodiment of the invention, at the stop zone of the secondary membrane,
- les figures 11 et 12 représentent des détails de la figure 10, etFIGS. 11 and 12 show details of FIG. 10, and
- la figure 13 est une vue en perspective de la zone d'arrêt de la membrane secondaire de cuve de la figure 10, au niveau d'un coin. Description détaillée de modes de réalisation de l'invention- Figure 13 is a perspective view of the stopping zone of the secondary cell membrane of Figure 10, at a corner. DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION
Les figures 3 à 9 se rapportent à une cuve selon un premier mode de réalisation de l'invention. La cuve présente plusieurs parois de cuve et est intégrée dans une structure porteuse 11. La structure porteuse 11 peut être la double coque d'un navire ou d'un autre type d'ouvrage flottant. De manière connue, chaque paroi de cuve présente successivement, dans le sens de l'épaisseur depuis l'intérieur vers l'extérieur de la cuve, une barrière étanche primaire, une barrière thermiquement isolante primaire, une barrière étanche secondaire et une barrière thermiquement isolante secondaire. De manière similaire à l'art antérieur cité en introduction, la barrière thermiquement isolante primaire, la barrière étanche secondaire et la barrière thermiquement isolante secondaire sont essentiellement constituées par un ensemble de panneaux préfabriqués fixés sur la structure porteuse 11. En particulier, la barrière étanche secondaire est constituée par un assemblage de nappes étanches. Chaque nappe est constituée d'un matériau composite dont les deux couches externes sont des tissus de fibres de verre et dont la couche intermédiaire est une feuille d'aluminium mince déformable d'environ 0,1 mm d'épaisseur. En fonction de son procédé de fabrication, la nappe peut être rigide ou souple. Chaque panneau préfabriqué comprend donc, entre autres, une nappe rigide collée sur une couche de matériau thermiquement isolant. Au niveau des jonctions entre panneaux adjacents, des bandes de nappe souple relient les nappes rigides adjacentes. Dans une zone située au sommet d'une paroi verticale de la cuve, la barrière étanche secondaire, également appelée membrane secondaire, est reliée à la structure porteuse 11. La figure 3 représente, en coupe, cette zone appelée la zone d'arrêt de la membrane secondaire. Les figures 4 et 5 représentent des détails de la figure 3.Figures 3 to 9 relate to a tank according to a first embodiment of the invention. The vessel has a plurality of vessel walls and is integrated into a carrier structure 11. The carrier structure 11 may be the double hull of a ship or other type of floating structure. In known manner, each tank wall has successively, in the thickness direction from the inside to the outside of the tank, a primary watertight barrier, a primary heat-insulating barrier, a secondary watertight barrier and a thermally insulating barrier. secondary. In a manner similar to the prior art mentioned in the introduction, the primary thermally insulating barrier, the secondary sealed barrier and the secondary thermal insulating barrier essentially consist of a set of prefabricated panels fixed on the supporting structure 11. In particular, the watertight barrier secondary is constituted by an assembly of waterproof plies. Each sheet consists of a composite material whose two outer layers are glass fiber fabrics and whose intermediate layer is a deformable thin aluminum sheet of about 0.1 mm thick. Depending on its manufacturing process, the sheet may be rigid or flexible. Each prefabricated panel therefore comprises, inter alia, a rigid sheet bonded to a layer of thermally insulating material. At the junctions between adjacent panels, strips of flexible ply connect the adjacent rigid plies. In an area located at the top of a vertical wall of the tank, the secondary watertight barrier, also called secondary membrane, is connected to the carrier structure 11. Figure 3 shows, in section, this area called the stopping zone of the secondary membrane. Figures 4 and 5 show details of Figure 3.
La structure porteuse 11 comprend un pan vertical 12 et un pan horizontal 13. Un plat 14 en L est soudé au pan horizontal 13. Le plat 14 présente une partie verticale 27 qui s'étend vers le bas, parallèlement au pan vertical 12, et une partie horizontale 28 située à l'extrémité inférieure de la partie verticale 27 et qui s'étend à distance du pan vertical 12. Une équerre 20 de fixation est fixée sous la partie horizontale 28.The carrying structure 11 comprises a vertical pan 12 and a horizontal pan 13. An L-shaped plate 14 is welded to the horizontal pan 13. The plate 14 has a vertical part 27 which extends downwards, parallel to the vertical pan 12, and a horizontal part 28 located at the lower end of the vertical part 27 and extending at a distance from the vertical pan 12. A fixing bracket 20 is fixed under the horizontal part 28.
Un étrier 21 en U est fixé au plat 14 et à l' équerre 20. Plus précisément, l'étrier 21 présente deux branches 30 parallèles reliées par une paroi 29 perpendiculaire aux branches 30. Les branches 30 sont fixées respectivement à la partie horizontale 28 du plat 14 et à l'équerre 20. On peut remarquer d'une part, que la structure porteuse 11 et le plat 14 présentent la même forme que dans l'art antérieur de la figure 1. Autrement dit, l'invention ne nécessite pas de modifier les formes de structures porteuses habituellement utilisées. D'autre part, la fixation de l'équerre 20 et de l'étrier 21 peut être réalisée facilement par soudure continue, de manière automatisée et fiable.A U-shaped stirrup 21 is fixed to the plate 14 and to the bracket 20. More precisely, the stirrup 21 has two parallel branches 30 connected by a wall 29 perpendicular to the branches 30. The branches 30 are respectively fixed to the horizontal part 28 of plate 14 and the bracket 20. It can be noted on the one hand, that the carrier structure 11 and the plate 14 have the same shape as in the prior art of Figure 1. In other words, the invention does not require not to modify the forms of support structures usually used. On the other hand, the fixing of the bracket 20 and the stirrup 21 can be easily achieved by continuous welding, in an automated and reliable manner.
On peut voir sur les figures 3 à 5 une couche 15 de matériau thermiquement isolant d'un panneau préfabriqué situé au sommet de la paroi. Cette couche 15 est recouverte par une nappe 16 rigide, sauf au niveau d'un bord supérieur. Au niveau de ce bord supérieur, la couche 15 est moins épaisse et le panneau présente une face 24 en retrait dans laquelle est ménagée une rainure 25 horizontale. La face 24 est située sensiblement dans le même plan que la paroi 29 de l'étrier 21, ce qui est possible car la géométrie de l'étrier 21 permet, lors de sa fixation, un réglage de la position de la paroi 29. Une plaque 22 métallique est soudée à la paroi 29 de l'étrier et s'étend vers le bas, en recouvrant la face 24 jusqu'à la rainure 25. A son extrémité inférieure, la plaque 22 présente un rebord 26 plié dans la rainure 25. Une bande de nappe 23 rigide est collée sur la plaque 22.FIGS. 3 to 5 show a layer 15 of thermally insulating material of a prefabricated panel located at the top of the wall. This layer 15 is covered by a rigid ply 16, except at an upper edge. At this upper edge, the layer 15 is thinner and the panel has a recessed face 24 in which is formed a horizontal groove. The face 24 is situated substantially in the same plane as the wall 29 of the stirrup 21, which is possible because the geometry of the stirrup 21 makes it possible, when it is fixed, to adjust the position of the wall 29. metal plate 22 is welded to the wall 29 of the yoke and extends downward, covering the face 24 to the groove 25. At its lower end, the plate 22 has a rim 26 folded in the groove 25 A strip of rigid ply 23 is glued to the plate 22.
Comme le montre la figure 5, une bande de nappe 17 souple est collée, d'une part, sur la nappe 16 et, d'autre part, sur la nappe 23. Une zone non encollée se trouve entre les nappes 16 et 23. On peut remarquer que ce collage est réalisé respectivement sur deux surfaces parallèles, sur lesquelles se trouvent des nappes rigides. Ce collage peut donc être réalisé facilement, de manière automatisée et fiable. En variante, il n'y a pas de bande de nappe 23 et la bande de nappe 17 est collée directement sur la plaque 22.As shown in FIG. 5, a flexible strip of ply 17 is bonded, on the one hand, to the ply 16 and, on the other hand, to the ply 23. An unsized zone is located between plies 16 and 23. We can notice that this bonding is performed respectively on two parallel surfaces, on which there are rigid webs. This bonding can therefore be achieved easily, automatically and reliably. As a variant, there is no strip of web 23 and the strip of web 17 is glued directly on the plate 22.
La structure qui précède permet de relier de manière étanche la nappe 16 du panneau préfabriqué à la structure porteuse 11, par l'intermédiaire de la nappe 17 souple, éventuellement de la nappe 23 rigide, de la plaque 22, de l'étrier 21 et du plat 14. De plus, la souplesse de la nappe 17 permet la reprise des déplacements imposés par la structure porteuse 11 et l'isolation thermique secondaire à la barrière étanche secondaire, en laissant une zone non encollée entre la nappe 23 et la nappe 16.The above structure makes it possible to connect in a leaktight manner the ply 16 of the prefabricated panel to the supporting structure 11, via the flexible ply 17, possibly the rigid ply 23, the plate 22, the stirrup 21 and of plate 14. In addition, the flexibility of the web 17 allows the resumption of displacement imposed by the carrier structure 11 and the secondary thermal insulation to the secondary sealed barrier, leaving a non-bonded area between the web 23 and the web 16 .
La figure 6 représente, en perspective, un coin de la cuve formé par deux parois verticales. On peut y voir, pour chaque paroi, certains des éléments décrits ci-dessus.Figure 6 shows, in perspective, a corner of the tank formed by two vertical walls. We can see, for each wall, some of the elements described above.
La figure 7 est similaire à la figure 6 et représente une variante dans laquelle une équerre 31 est fixée dans l'angle, pour maintenir la nappe 17 souple en place. En effet, le collage à plat soumet le collage des zones d'angle à une résultante d'efforts thermomécaniques perpendiculaires au plan de collage pouvant entraîner la rupture du joint collé par pelage. En fonction du dimensionnement de la cuve et des caractéristiques du collage, une telle équerre 31 peut être nécessaire ou non. La figure 8 montre l' équerre 31 et ses boulons de fixation de manière plus détaillée.Figure 7 is similar to Figure 6 and shows a variant in which a bracket 31 is fixed in the corner, to maintain the flexible web 17 in place. Indeed, the flat gluing submits the gluing of the corner areas to a resultant of thermomechanical forces perpendicular to the bonding plane may cause the rupture of the glued joint by peeling. Depending on the size of the tank and the characteristics of the bonding, such a bracket 31 may be necessary or not. Figure 8 shows the bracket 31 and its fixing bolts in more detail.
La figure 9 est similaire à la figure 6, mais la nappe 17 souple a été retirée pour permettre de voir les éléments sous-jacents. On peut y voir que la nappe 23 rigide se présente, le long des parois, sous forme d'une bande plane. De manière connue, une telle bande plane est fabriquée à partir de deux couches de tissu de verre agencées de part et d'autre d'une feuille d'aluminium, résinées ensemble et pressées à chaud durant la polymérisation de la résine. Dans le coin, la nappe 23 rigide se présente sous la forme d'une bande en L. Une telle bande non plane peut être fabriquée en polymérisant la résine, à chaud et sous pression, sur un moule à forme voulue. En variante, dans le coin, on utilise une nappe 23 souple qui, de par sa souplesse, peut s'adapter à une zone de coin. Les figures 10 à 13 représentent une cuve selon un deuxième mode de réalisation de l'invention. La cuve présente plusieurs parois de cuve et est intégrée dans une structure porteuse 111. La structure porteuse 111 comprend des pans de mur verticaux en béton précontraint. Dans ce mode de réalisation, la structure porteuse 111 et la cuve forment un réservoir terrestre pour GNL.Figure 9 is similar to Figure 6, but the flexible web 17 has been removed to allow viewing of the underlying elements. It can be seen that the rigid sheet 23 is present along the walls in the form of a flat strip. In known manner, such a flat strip is manufactured from two layers of glass fabric arranged on either side of an aluminum foil, resined together and hot pressed during the polymerization of the resin. In the corner, the rigid ply 23 is in the form of an L-shaped strip. Such a non-planar strip can be made by polymerizing the resin, under heat and under pressure, on a mold with the desired shape. Alternatively, in the corner, is used a flexible web 23 which, by its flexibility, can adapt to a corner area. Figures 10 to 13 show a vessel according to a second embodiment of the invention. The vessel has a plurality of vessel walls and is integrated into a carrier structure 111. The carrier structure 111 comprises vertical wall sections of prestressed concrete. In this embodiment, the carrier structure 111 and the tank form a land tank for LNG.
Une plaque 114 métallique est fixée à la structure porteuse 111. Par exemple, la plaque 114 est positionnée pendant le coulage du béton. Une plaque 120 métallique est soudée à la plaque 114, et s'étend horizontalement.A metal plate 114 is attached to the carrier structure 111. For example, the plate 114 is positioned during casting of the concrete. A metal plate 120 is welded to the plate 114, and extends horizontally.
De manière similaire au premier mode de réalisation, la barrière thermiquement isolante primaire, la barrière étanche secondaire et la barrière thermiquement isolante secondaire de la cuve sont essentiellement constituées par un ensemble de panneaux préfabriqués fixés sur la structure porteuse 111. On peut voir notamment sur la figure 11 que chaque panneau préfabriqué supérieur comprend une couche 115 de matériau isolant, recouverte par une plaque 132 en contreplaqué. La plaque 132 est recouverte par une nappe 116 rigide, sauf au niveau d'un bord supérieur moins épais, où la plaque 132 présente une face 124 en retrait.Similarly to the first embodiment, the primary thermally insulating barrier, the secondary sealed barrier and the secondary thermally insulating barrier of the vessel essentially consist of a set of prefabricated panels fixed on the supporting structure 111. It can be seen in particular on the Figure 11 that each upper prefabricated panel comprises a layer 115 of insulating material, covered by a plate 132 of plywood. The plate 132 is covered by a rigid ply 116, except at a lower thicker edge, where the plate 132 has a recessed face 124.
Une plaque 122 métallique est vissée au panneau 132, sur la face 124, en laissant une zone 133 non recouverte adjacente à la partie du panneau 132 recouverte par la nappe 116. La plaque 122 est partiellement recouverte par une nappe 123 rigide. Comme le montre la figure 12, une bande de nappe 1 17 souple est collée, d'une part, sur la nappe 116 et, d'autre part, sur la nappe 123. Une zone non encollée se trouve entre les nappes 116 et 123. On peut remarquer que ce collage est réalisé respectivement sur deux surfaces parallèles, sur lesquelles se trouvent des nappes rigides. Ce collage peut donc être réalisé facilement, de manière automatisée et fiable. De préférence, les nappes 116 et 123 sont situées dans le même plan, ce qui facilite encore le collage. En variante, il n'y a pas de nappe 123 et la bande de nappe 117 est collée directement sur la plaque 122.A metal plate 122 is screwed to the panel 132, on the face 124, leaving an uncoated area 133 adjacent the portion of the panel 132 covered by the web 116. The plate 122 is partially covered by a rigid web 123. As shown in FIG. 12, a strip of flexible ply 117 is adhered, on the one hand, to ply 116 and, on the other hand, to ply 123. An unsized zone is located between plies 116 and 123 It may be noted that this bonding is carried out respectively on two parallel surfaces, on which there are rigid plies. This bonding can therefore be achieved easily, automatically and reliably. Preferably, the plies 116 and 123 are located in the same plane, which further facilitates gluing. In a variant, there is no ply 123 and the ply strip 117 is stuck directly on the plate 122.
Une cornière 121 métallique est soudée, d'une part, à la plaque 120 et, d'autre part, à la plaque 122. Plus précisément, la cornière 121 présente une paroi horizontale 130 soudée à la plaque 120 et une paroi verticale 129 soudée à la plaque 122.A metal angle 121 is welded, on the one hand, to the plate 120 and, on the other hand, to the plate 122. More precisely, the angle 121 has a horizontal wall 130 welded to the plate 120 and a vertical wall 129 welded to the plate 122.
Ainsi, la structure qui précède permet de relier de manière étanche la nappe 116 du panneau préfabriqué à la structure porteuse 111, par l'intermédiaire de la nappe 117 souple, de la nappe 123 rigide, de la plaque 122, de la cornière 121 et des plaques 120 et 114. Le collage de la nappe 117 peut être réalisé de manière automatisée et fiable. De manière similaire, la soudure de la cornière 121 peut être réalisée de manière automatisée et fiable. La géométrie de la cornière 121 permet un réglage de position pour coïncider avec la position de la plaque 122.Thus, the above structure makes it possible to seal the web 116 of the prefabricated panel to the carrier structure 111, via the ply 117, the rigid ply 123, the plate 122, the angle 121 and plates 120 and 114. The bonding of the web 117 can be performed in an automated and reliable manner. Similarly, the welding of the angle 121 can be performed in an automated and reliable manner. The geometry of the angle 121 allows a position adjustment to coincide with the position of the plate 122.
La figure 13 représente la zone d'arrêt de la membrane secondaire en perspective. On peut y voir une zone d'angle 133 entre deux parois verticales adjacentes. Cet angle est plus ouvert que dans le cas du premier mode de réalisation de sorte que le risque de décollage par pelage est moins élevé. Cependant, en fonction du dimensionnement de la cuve et des caractéristiques du pelage, on peut éventuellement fixer une équerre de bridage, de manière similaire à l'équerre 31 du premier mode de réalisation.Figure 13 shows the stopping area of the secondary membrane in perspective. There can be seen a corner area 133 between two adjacent vertical walls. This angle is more open than in the case of the first embodiment so that the risk of peeling off is lower. However, depending on the dimensioning of the tank and the characteristics of the peel, one can optionally fix a clamping bracket, similarly to the bracket 31 of the first embodiment.
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.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.
Dans les deux modes de réalisation décrits ci-dessus, la nappe souple forme avec notamment la plaque 22 ou 122 un dispositif de liaison reliant de manière étanche la nappe d'un panneau préfabriqué à la structure porteuse. Un dispositif de liaison a été décrit en relation avec un ouvrage flottant et l'autre avec un réservoir terrestre. Les deux dispositifs de liaison peuvent toutefois être utilisés avec un ouvrage flottant ou un réservoir terrestre. In the two embodiments described above, the flexible ply forms, in particular with the plate 22 or 122, a connection device sealingly connecting the ply of a prefabricated panel to the supporting structure. A connecting device has been described in relation to a floating structure and the other with a terrestrial reservoir. The two connecting devices can however be used with a floating structure or a terrestrial reservoir.

Claims

REVENDICATIONS
1. Réservoir pour gaz naturel liquéfié, comprenant une structure porteuse (11, 111) et une cuve étanche et thermiquement isolée destinée à contenir du gaz naturel liquéfié, ladite cuve comprenant plusieurs parois de cuve fixées à ladite structure porteuse, chaque paroi de cuve présentant successivement, dans le sens de l'épaisseur depuis l'intérieur vers l'extérieur de ladite cuve, une barrière étanche primaire, une barrière thermiquement isolante primaire, une barrière étanche secondaire et une barrière thermiquement isolante secondaire, lesdites parois de cuve comprenant au moins une paroi verticale, la barrière étanche secondaire de ladite paroi verticale comprenant une première nappe étanche (16, 116) située au sommet de ladite paroi et un dispositif de liaison reliant, de manière étanche, ladite première nappe étanche à ladite structure porteuse, caractérisé par le fait que ledit dispositif de liaison comprend une première plaque métallique (22, 122) parallèle à ladite première nappe étanche, et une deuxième nappe étanche (17, 117) qui est, d'une part, collée à ladite première nappe étanche et d'autre part reliée à ladite première plaque métallique.A tank for liquefied natural gas, comprising a carrier structure (11, 111) and a sealed and thermally insulated tank for containing liquefied natural gas, said tank comprising a plurality of tank walls attached to said carrier structure, each tank wall having successively, in the thickness direction from the inside to the outside of said tank, a primary watertight barrier, a primary heat-insulating barrier, a secondary watertight barrier and a secondary heat-insulating barrier, said tank walls comprising at least a vertical wall, the secondary sealed barrier of said vertical wall comprising a first watertight sheet (16, 116) located at the top of said wall and a connection device sealingly connecting said first watertight sheet to said supporting structure, characterized by the fact that said connecting device comprises a first metal plate (22, 122) parallel to said first watertight web, and a second watertight web (17, 117) which is, on the one hand, glued to said first watertight web and on the other hand connected to said first metal plate.
2. Réservoir selon la revendication précédente, dans lequel ladite deuxième nappe étanche est souple et présente une zone non encollée entre la première nappe étanche et la première plaque métallique.2. Tank according to the preceding claim, wherein said second watertight web is flexible and has a non-sized area between the first watertight web and the first metal plate.
3. Réservoir selon l'une des revendications précédentes, dans lequel une troisième nappe étanche (23, 123) est collée à ladite première plaque métallique, ladite deuxième nappe étanche étant collée à ladite troisième nappe étanche.3. Tank according to one of the preceding claims, wherein a third waterproof ply (23, 123) is bonded to said first metal plate, said second watertight ply being adhered to said third watertight ply.
4. Réservoir selon l'une des revendications précédentes, dans lequel ladite première plaque métallique est soudée à une pièce métallique (21, 121) reliée à la structure porteuse. 4. Tank according to one of the preceding claims, wherein said first metal plate is welded to a metal part (21, 121) connected to the carrier structure.
5. Réservoir selon la revendication précédente, dans lequel ladite pièce métallique présente une partie verticale (29, 129) et une partie horizontale (30, 130), la première plaque métallique étant soudée à la partie verticale, la partie horizontale étant reliée à la structure porteuse. 5. Tank according to the preceding claim, wherein said metal part has a vertical portion (29, 129) and a horizontal portion (30, 130), the first metal plate being welded to the vertical portion, the horizontal portion being connected to the supporting structure.
6. Réservoir selon l'une des revendications précédentes, dans lequel ladite première nappe étanche est collée sur une couche de matériau isolant (15) ou sur une plaque de contreplaqué (132) faisant partie de la barrière thermiquement isolante secondaire.6. Tank according to one of the preceding claims, wherein said first watertight web is glued on a layer of insulating material (15) or a plywood plate (132) forming part of the secondary heat-insulating barrier.
7. Réservoir selon l'une des revendications précédentes, dans lequel ladite structure porteuse comprend des pans de mur verticaux en béton, installés sur terre.7. Tank according to one of the preceding claims, wherein said supporting structure comprises vertical concrete wall panels, installed on earth.
8. Réservoir selon l'une des revendications précédentes, dans lequel ladite structure porteuse comprend la double coque d'un ouvrage flottant. 8. Tank according to one of the preceding claims, wherein said bearing structure comprises the double shell of a floating structure.
EP10715919.6A 2009-04-14 2010-03-11 Stopper for a secondary diaphragm of an lng vat Active EP2419671B3 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL10715919T PL2419671T6 (en) 2009-04-14 2010-03-11 Stopper for a secondary diaphragm of an lng vat
HRP20160092TT HRP20160092T4 (en) 2009-04-14 2016-01-28 Stopper for a secondary diaphragm of an lng vat

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0952425A FR2944335B1 (en) 2009-04-14 2009-04-14 STOPPING THE SECONDARY MEMBRANE FROM AN LNG TANK
PCT/FR2010/050417 WO2010119199A1 (en) 2009-04-14 2010-03-11 Stopper for a secondary diaphragm of an lng vat

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EP2419671A1 true EP2419671A1 (en) 2012-02-22
EP2419671B1 EP2419671B1 (en) 2015-10-28
EP2419671B3 EP2419671B3 (en) 2016-11-02

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CA2752208A1 (en) 2010-10-21
RU2011141902A (en) 2013-05-20
CO6440521A2 (en) 2012-05-15
IL217318A0 (en) 2012-02-29
EG26598A (en) 2014-03-20
MY157011A (en) 2016-04-15
PL2419671T6 (en) 2017-10-31
CU20120073A7 (en) 2012-06-21
US20120012473A1 (en) 2012-01-19
CN102348925A (en) 2012-02-08
NZ594659A (en) 2013-03-28
JP2012523527A (en) 2012-10-04
HRP20160092T1 (en) 2016-02-26
HN2012000110A (en) 2015-05-18
FR2944335A1 (en) 2010-10-15
CA2752208C (en) 2017-03-28
ZA201107470B (en) 2012-07-25
CN102348925B (en) 2013-05-22
SA110310287B1 (en) 2014-06-03
EP2419671B1 (en) 2015-10-28
ES2559931T3 (en) 2016-02-16
KR20110137398A (en) 2011-12-22
BRPI1015526B1 (en) 2020-08-25
AR076286A1 (en) 2011-06-01
HRP20160092T4 (en) 2017-03-24
CL2011002179A1 (en) 2012-01-20
PL2419671T3 (en) 2016-04-29
DOP2011000263A (en) 2011-10-15
RU2514458C2 (en) 2014-04-27
UA104308C2 (en) 2014-01-27
KR101412680B1 (en) 2014-06-26
AU2010238386B2 (en) 2015-07-09
US9291308B2 (en) 2016-03-22
HRP20160092T8 (en) 2016-03-25
ES2559931T7 (en) 2017-05-17
TWI596296B (en) 2017-08-21
SG174490A1 (en) 2011-10-28
TN2011000407A1 (en) 2013-03-27
EP2419671B3 (en) 2016-11-02
BRPI1015526A2 (en) 2016-04-26
JP5374636B2 (en) 2013-12-25
WO2010119199A1 (en) 2010-10-21
IL217318A (en) 2014-11-30
FR2944335B1 (en) 2011-05-06
MX2011010549A (en) 2011-12-16
MA33253B1 (en) 2012-05-02
AU2010238386A1 (en) 2011-10-27
TW201102554A (en) 2011-01-16
PE20121005A1 (en) 2012-08-16

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