EP2453159A2 - Tank with reinforced corrugated membrane - Google Patents

Tank with reinforced corrugated membrane Download PDF

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Publication number
EP2453159A2
EP2453159A2 EP12154056A EP12154056A EP2453159A2 EP 2453159 A2 EP2453159 A2 EP 2453159A2 EP 12154056 A EP12154056 A EP 12154056A EP 12154056 A EP12154056 A EP 12154056A EP 2453159 A2 EP2453159 A2 EP 2453159A2
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EP
European Patent Office
Prior art keywords
reinforcing element
membrane
tank according
wave
tank
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
EP12154056A
Other languages
German (de)
French (fr)
Other versions
EP2453159B1 (en
EP2453159A3 (en
Inventor
Mokrane Yataghene
Bruno Deletre
Gery Canler
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
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Gaztransport et Technigaz SA
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Publication date
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Publication of EP2453159A2 publication Critical patent/EP2453159A2/en
Publication of EP2453159A3 publication Critical patent/EP2453159A3/en
Application granted granted Critical
Publication of EP2453159B1 publication Critical patent/EP2453159B1/en
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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
    • 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
    • F17C2203/01—Reinforcing or suspension means
    • F17C2203/011—Reinforcing means
    • F17C2203/012—Reinforcing means on or in the wall, e.g. ribs
    • 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
    • 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

Definitions

  • the present invention relates to a sealed tank.
  • the present invention relates to a sealed and thermally insulated tank for the transport of liquefied natural gas (LNG) by ship.
  • LNG liquefied natural gas
  • the document FR 2 781557 describes a tank integrated in the structure of a ship, which allows the transport of LNG.
  • the walls of the tank successively comprise, from inside the tank to the outside, a primary watertight barrier, a primary thermally insulating barrier, a secondary watertight barrier and a secondary thermal insulating barrier.
  • the primary waterproof barrier is a membrane made of corrugated metal plates made of stainless steel. Specifically, each plate has a series of waves parallel to the axis of the ship and another series of waves perpendicular to the axis of the ship.
  • the waves provided on the metal plates of the membrane are intended to allow the membrane to deform to limit the stresses generated by the thermal shrinkage and the effect of the beam of the ship.
  • the document FR 2 861 060 proposes to provide reinforcing ribs on the waves.
  • 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 improve the pressure resistance of the membrane, in order to avoid or limit the plastic deformations.
  • the solution proposed by the invention is a sealed tank, at least one wall comprises a sealed membrane intended to be in contact with the product contained in the tank and a support adjacent to the membrane, wherein the membrane comprises at least one plate having at least one wave, characterized in that it comprises a reinforcement element inserted under the wave, between the membrane and the support.
  • the membrane may comprise several plates, the plate may have several waves, and a rendort element may be arranged in one or more waves of one or more plates.
  • the support may be for example a thermally insulating layer, and more specifically a plywood panel with a thermally insulating layer.
  • the reinforcing element has an internal passage that allows gas to flow between the wave and the support through the reinforcing element.
  • an external passage allows gas to flow between the wave and the support bypassing the reinforcing element.
  • the reinforcing element is made of a material chosen from: plywood, polyethylene, polycarbonate, polycarbonate reinforced with glass fibers, polyether imide, and expanded polystyrene.
  • the reinforcing element comprises an outer envelope whose shape corresponds substantially to the shape of the wave.
  • the reinforcing element comprises at least one reinforcing web inside said envelope.
  • the minimum distance between the reinforcing element and the wave is between 0% and 5% of the height of the wave.
  • the plate has a first series of waves parallel to each other, and a second series of waves parallel to each other and transverse to the waves of the first series, the reinforcing element being inserted under a wave of the first series.
  • the reinforcing element can be inserted under several waves of the first series.
  • the reinforcing element has a length corresponding to the distance between two waves of the second series. Alternatively, this length may be smaller or larger.
  • the reinforcing element is inserted under the wave slidably with respect to the membrane and the support.
  • the manufacture of the tank does not require a fixing step of the reinforcing element.
  • the reinforcing element is fixed to the membrane or to the support. This ensures that the reinforcing element remains positioned at the desired location.
  • the membrane has an undercut, the reinforcing element being clipped to, or wedged in, the undercut.
  • At least two reinforcing elements are respectively arranged under two adjacent waves of the membrane, one of said two reinforcing elements forming a stop for the other of said two reinforcing elements.
  • a reinforcing element is made prisoner by the other and is thus held in place.
  • the reinforcing element has at least one weak point able to deform or break if it is subjected to a stress greater than a determined threshold.
  • the membrane is in contact with the support.
  • the invention also provides a floating structure comprising a tank according to the invention above. It can be a ship or other type of floating installation.
  • a tank according to one embodiment of the invention may have a multilayer structure similarly to the vessels of the documents FR 2 781 557 and FR 2 861 060 cited in the introduction.
  • the vessel has a primary waterproof membrane made of corrugated metal plates that rest on a plywood panel of a primary heat-insulating layer. Since the general aspects of this multilayer structure are known, the features of the tank according to one embodiment of the invention are described below.
  • the plate 1 shown on the figure 1 is a corrugated plate, made of stainless steel, of generally rectangular shape.
  • the primary waterproof membrane of the tank is made by welding several plates of this type side by side.
  • the plate 1 comprises three large waves 2 extending along the length of the plate 1, and nine small waves 3 extending along the width of the plate 1. We speak of large waves 2 and small waves 3 because the height long wave 2 is greater than that of small waves 3.
  • the plate 1 could have a different number of large waves 2 and / or small waves 3.
  • the waves of the plate 1 could have reinforcing ribs as described in FIG. FR 2 861 060 .
  • the waves of the plate 1 could also have other configurations, for example as in the documents FR 2,735,847 or KR-10-2005-0050170 .
  • the plate 1 rests on the plywood 4 of the underlying thermally insulating layer.
  • the plate 1 could be based on another type of support.
  • a reinforcing element 5 is arranged under the large wave 2, between the plate 1 and the plywood 4.
  • "sub” means that the reinforcing element 5 is covered by the wave, but does not necessarily mean that it is lower. Indeed, on the vertical walls of the tank, the reinforcing element 5 is at the horizontal of the wave which covers it.
  • the length of the reinforcing element 5 corresponds to the distance between two small waves 3.
  • reinforcing elements 5 can be arranged, each under a large wave 2 between two small waves 3.
  • the number and the distribution of the reinforcing elements 5 can be determined as a function of the distribution of the stresses provided during operation in the membrane of the tank. .
  • the length of the reinforcing element 5 may be less than the distance between two small waves 3 or, if the geometry of the crossover between waves allows, greater than this distance.
  • reinforcing elements 5 may be provided under the small waves 3.
  • the reinforcing element 5 is put in place as shown on the figure 2 without being fixed to the plate 1 or the plywood 4. It can therefore possibly slide under the large wave 2. The manufacture of the tank therefore does not require a fixing step of the reinforcing elements 5.
  • the reinforcing member 5 may be attached to the membrane or plywood 4.
  • FIGS. 3 to 11 represent different shapes that may be suitable.
  • the views of Figures 3 to 9 are perspective views of a slice of the reinforcing element 5, the length of which may be greater than that shown.
  • the views of Figures 10 and 11 are sectional views. In these different figures, the same reference signs are used to designate similar elements.
  • the reinforcing element 5 of the figure 3 has a full section. Its two lateral faces 6 are curved and of shape corresponding to that of the wave 2. However, the lateral faces 6 do not extend to the top of the wave 2 and the reinforcing element 5 has an upper face 7 flat. Gas can flow between the top of the wave 2 and the upper face 7.
  • the reinforcing element 5 of the figure 4 has an envelope 8 whose outer shape corresponds to the shape of the wave 2.
  • a circular passage 9 allows the gas to pass through the reinforcing element 5.
  • the passage 9 has a shape corresponding to the outer shape of the envelope 8, to provide a larger passage area.
  • the reinforcing element 5 of the figure 6 also has a casing 8 whose outer shape corresponds to the shape of the wave 2 and a passage 9.
  • a casing 8 whose outer shape corresponds to the shape of the wave 2 and a passage 9.
  • internal webs 10 pass through the passage 9.
  • Figures 7 to 9 represent alternative configurations of the sails 10.
  • the reinforcement elements Figures 3 to 9 can be made for example of one of the following materials: polyethylene, polycarbonate, glass fiber reinforced polycarbonate, polyether imide, and expanded polystyrene. They can be manufactured by any appropriate technique (injection, molding, extrusion, machining, .
  • the reinforcing elements 5 of the Figures 10 and 11 have a full section. Their side faces 6 each have two flat strips. As for the reinforcing element of the figure 3 gas can pass between the upper face 7 and the top of the wave.
  • the reinforcing elements 5 of the Figures 10 and 11 can for example be made of plywood, by machining.
  • the reinforcing element 5 of the figure 11 has a tongue 22 fixed to its lower face 23.
  • the tongue 23 allows to fix the reinforcing element 5 to the plywood 4, for example at the junction between two plywood plates.
  • the figure 12 shows, on the left-hand side, the geometry of the waves at the level of a cross between a large wave 2 and a small wave 3. It can be seen that the membrane presents at this level an undercut 20.
  • the right part of the figure 12 shows that the reinforcing element 5 arranged under a large wave 2 has, at its end, tabs 21 which allow fixing the reinforcing element 5 to the membrane, by clipping at the undercut 20. Alternatively, the tabs 21 could be stuck.
  • the figure 13 represents in perspective a reinforcing element 5 which is intended to be arranged simultaneously under several large waves 2 and small waves 3. Its shape corresponds to those of the waves, including at crossings. Internal passages 9 are provided both in the parts situated under the small waves 3 and under the long waves 2.
  • the figure 14 represents two reinforcing elements 5, one being intended to be arranged under a large wave 2 and the other under a small wave 3, crossing at the crossing of the waves.
  • the reinforcing elements 5 each have a notch 24 for positioning them relative to each other.
  • the reinforcing elements 5 have a rectangular section.
  • reinforcing element 5 allows the waves to deform in the event of thermal contraction, and offer support to the waves in case of deformation due to hydrostatic and dynamic pressures. To achieve this goal, it can be expected that, when the tank is empty (so in the absence of thermal loading and hydrostatic or dynamic pressure), the minimum distance between the reinforcing element 5 and the wave under which it is between 0% and 5% of the height of the wave.
  • reinforcement element 5 each have particular properties: cost and ease of manufacture, mechanical strength, quantity of material, etc. Depending on the applications, the most appropriate form may be chosen.

Abstract

The tank has a wall including a sealed membrane that is in contact with a product i.e. liquefied natural gas, contained in the tank. A support is adjacent to the membrane. A reinforcement element (5) is inserted under a large corrugation (2) and a small corrugation of a plate (1) and between the membrane and the support. The reinforcement element includes an internal passage and an external case whose shape corresponds to shape of the large corrugation.

Description

Domaine technique de l'inventionTechnical field of the invention

La présente invention se rapporte à une cuve étanche. En particulier, la présente invention se rapporte à une cuve étanche et thermiquement isolée destinée au transport de gaz naturel liquéfié (GNL) par navire.The present invention relates to a sealed tank. In particular, the present invention relates to a sealed and thermally insulated tank for the transport of liquefied natural gas (LNG) by ship.

Etat de la techniqueState of the art

Le document FR 2 781557 décrit une cuve intégrée dans la structure d'un navire, qui permet le transport de GNL. Les parois de la cuve comprennent successivement, depuis l'intérieur de la cuve vers l'extérieur, une barrière étanche primaire, une barrière thermiquement isolante primaire, une barrière étanche secondaire et une barrière thermiquement isolante secondaire. La barrière étanche primaire est une membrane réalisée avec des plaques métalliques ondulées, en acier inoxydable. Plus précisément, chaque plaque présente une série d'ondes parallèles à l'axe du navire et une autre série d'ondes perpendiculaires à l'axe du navire.The document FR 2 781557 describes a tank integrated in the structure of a ship, which allows the transport of LNG. The walls of the tank successively comprise, from inside the tank to the outside, a primary watertight barrier, a primary thermally insulating barrier, a secondary watertight barrier and a secondary thermal insulating barrier. The primary waterproof barrier is a membrane made of corrugated metal plates made of stainless steel. Specifically, each plate has a series of waves parallel to the axis of the ship and another series of waves perpendicular to the axis of the ship.

En fonctionnement, des contraintes mécaniques sont générées dans la membrane. Ces contraintes ont plusieurs sources: la rétraction thermique lors de la mise à froid de la cuve, l'effet de la poutre du navire, la pression hydrostatique due au chargement, ainsi que la pression dynamique due au mouvement de la cargaison, notamment en raison de la houle.In operation, mechanical stresses are generated in the membrane. These constraints have several sources: the thermal shrinkage during the cold setting of the tank, the effect of the beam of the ship, the hydrostatic pressure due to loading, as well as the dynamic pressure due to the movement of the cargo, in particular because of the swell.

Les ondes prévues sur les plaques métalliques de la membrane sont destinées à permettre à la membrane de se déformer pour limiter les contraintes engendrées par la rétraction thermique et l'effet de la poutre du navire.The waves provided on the metal plates of the membrane are intended to allow the membrane to deform to limit the stresses generated by the thermal shrinkage and the effect of the beam of the ship.

On a constaté que la pression dynamique pouvait provoquer des déformations plastiques des ondes. Or, à l'usage, de telles déformation peuvent conduire à dégrader la flexibilité des plaques et nuire à l'étanchéité de la membrane, notamment au niveau des jonctions entre plaques.It has been found that the dynamic pressure can cause plastic deformations of the waves. However, in use, such deformation can lead to degrade the flexibility of the plates and affect the sealing of the membrane, especially at the junctions between plates.

Pour augmenter la résistance à la pression de la membrane et limiter les déformations plastiques, le document FR 2 861 060 propose de prévoir des nervures de renfort sur les ondes.To increase the pressure resistance of the membrane and to limit the plastic deformations, the document FR 2 861 060 proposes to provide reinforcing ribs on the waves.

Cependant, il peut être intéressant d'accroitre encore la résistance à la pression de la membrane.However, it may be advantageous to further increase the pressure resistance of the membrane.

Résumé de l'inventionSummary 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 d'améliorer la résistance à la pression de la membrane, afin d'éviter ou d'en limiter les déformations plastiques.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 improve the pressure resistance of the membrane, in order to avoid or limit the plastic deformations.

La solution proposée par l'invention est une cuve étanche, dont au moins une paroi comprend une membrane étanche destinée à être en contact avec du produit contenu dans la cuve et un support adjacent à la membrane, dans laquelle la membrane comprend au moins une plaque présentant au moins une onde, caractérisée par le fait qu'elle comprend un élément de renfort inséré sous l'onde, entre la membrane et le support.The solution proposed by the invention is a sealed tank, at least one wall comprises a sealed membrane intended to be in contact with the product contained in the tank and a support adjacent to the membrane, wherein the membrane comprises at least one plate having at least one wave, characterized in that it comprises a reinforcement element inserted under the wave, between the membrane and the support.

On a constaté qu'un tel élément de renfort permet de limiter les contraintes générées dans la membrane. Bien entendu, la membrane peut comprendre plusieurs plaques, la plaque peut présenter plusieurs ondes, et un élément de rendort peut être agencé sous une ou plusieurs ondes d'une ou plusieurs plaques. Le support peut être par exemple une couche thermiquement isolante, et plus précisément un panneau en contreplaqué d'une couche thermiquement isolante.It has been found that such a reinforcing element makes it possible to limit the stresses generated in the membrane. Of course, the membrane may comprise several plates, the plate may have several waves, and a rendort element may be arranged in one or more waves of one or more plates. The support may be for example a thermally insulating layer, and more specifically a plywood panel with a thermally insulating layer.

Selon un mode de réalisation, l'élément de renfort présente un passage interne qui permet à du gaz de circuler entre l'onde et le support en traversant l'élément de renfort.According to one embodiment, the reinforcing element has an internal passage that allows gas to flow between the wave and the support through the reinforcing element.

Selon un mode de réalisation, un passage externe permet à du gaz de circuler entre l'onde et le support en contournant l'élément de renfort.According to one embodiment, an external passage allows gas to flow between the wave and the support bypassing the reinforcing element.

Avantageusement, l'élément de renfort est réalisé en un matériau choisi parmi : le contreplaqué, le polyéthylène, le polycarbonate, le polycarbonate renforcé de fibres de verres, le polyéther imide, et le polystyrène expansé.Advantageously, the reinforcing element is made of a material chosen from: plywood, polyethylene, polycarbonate, polycarbonate reinforced with glass fibers, polyether imide, and expanded polystyrene.

Selon un mode de réalisation, l'élément de renfort comprend une enveloppe externe dont la forme correspond sensiblement à la forme de l'onde.According to one embodiment, the reinforcing element comprises an outer envelope whose shape corresponds substantially to the shape of the wave.

De préférence, l'élément de renfort comprend au moins un voile de renfort à l'intérieur de ladite enveloppe.Preferably, the reinforcing element comprises at least one reinforcing web inside said envelope.

Avantageusement, en l'absence de produit contenu dans la cuve, la distance minimale entre l'élément de renfort et l'onde est comprise entre 0 % et 5 % de la hauteur de l'onde.Advantageously, in the absence of product contained in the tank, the minimum distance between the reinforcing element and the wave is between 0% and 5% of the height of the wave.

De préférence, la plaque présente une première série d'ondes parallèles entre elles, et une deuxième série d'ondes parallèles entre elles et transverses aux ondes de la première série, l'élément de renfort étant inséré sous une onde de la première série. Bien entendu, plusieurs éléments de renfort peuvent être insérés sous plusieurs ondes de la première série.Preferably, the plate has a first series of waves parallel to each other, and a second series of waves parallel to each other and transverse to the waves of the first series, the reinforcing element being inserted under a wave of the first series. Of course, several reinforcing elements can be inserted under several waves of the first series.

Selon un mode de réalisation, l'élément de renfort présente une longueur correspondant à la distance entre deux ondes de la deuxième série. En variante, cette longueur peut être plus petite ou plus grande.According to one embodiment, the reinforcing element has a length corresponding to the distance between two waves of the second series. Alternatively, this length may be smaller or larger.

Avantageusement, l'élément de renfort est inséré sous l'onde de manière glissante par rapport à la membrane et au support. Dans ce cas, la fabrication de la cuve ne nécessite pas d'étape de fixation de l'élément de renfort.Advantageously, the reinforcing element is inserted under the wave slidably with respect to the membrane and the support. In this case, the manufacture of the tank does not require a fixing step of the reinforcing element.

Dans une variante, l'élément de renfort est fixé à la membrane ou au support. Cela permet d'assurer que l'élément de renfort reste positionné à l'endroit voulu.In a variant, the reinforcing element is fixed to the membrane or to the support. This ensures that the reinforcing element remains positioned at the desired location.

Selon un mode de réalisation, la membrane présente une contre-dépouille, l'élément de renfort étant clipsé à, ou coincé dans, la contre-dépouille.According to one embodiment, the membrane has an undercut, the reinforcing element being clipped to, or wedged in, the undercut.

Selon un mode de réalisation, au moins deux éléments de renfort sont agencés respectivement sous deux ondes adjacentes de la membrane, l'un desdits deux éléments de renfort formant une butée pour l'autre desdits deux éléments de renfort. Ainsi, un élément de renfort est rendu prisonnier par l'autre et est donc maintenu en place.According to one embodiment, at least two reinforcing elements are respectively arranged under two adjacent waves of the membrane, one of said two reinforcing elements forming a stop for the other of said two reinforcing elements. Thus, a reinforcing element is made prisoner by the other and is thus held in place.

Avantageusement, l'élément de renfort présente au moins un point faible apte à se déformer ou se rompre s'il est soumis à une contrainte supérieure à un seuil déterminé.Advantageously, the reinforcing element has at least one weak point able to deform or break if it is subjected to a stress greater than a determined threshold.

Cela permet de connaître, par des déformations plastiques contrôlées des la membrane, les pressions subies par la membrane et d'identifier d'éventuels risques d'endommagement pour le support sous-jacent.This makes it possible to know, by controlled plastic deformation of the membrane, the pressures experienced by the membrane and to identify possible risks of damage for the underlying support.

De préférence, à distance de l'onde, la membrane est en contact avec le support.Preferably, at a distance from the wave, the membrane is in contact with the support.

L'invention fournit également un ouvrage flottant comprenant une cuve selon l'invention ci-dessus. Il peut s'agir d'un navire ou d'un autre type d'installation flottante.The invention also provides a floating structure comprising a tank according to the invention above. It can be a ship or other type of floating installation.

Brève description des figuresBrief 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 d'un mode de réalisation particulier de l'invention, donné uniquement à titre illustratif et non limitatif, en référence aux dessins annexés. Sur ces dessins :

  • la figure 1 est une vue en perspective d'une plaque ondulée d'une cuve selon un mode de réalisation de l'invention,
  • la figure 2 est une vue en perspective et en coupe d'une onde de la plaque ondulée de la figure 1, et d'un élément de renfort selon une première variante,
  • les figures 3 à 9 représentent, en perspective, différentes variantes de l'élément de renfort, et
  • les figures 10 et 11 représentent, en coupe, d'autres variantes de l'élément de renfort,
  • la figure 12 montre une vue de dessus de la plaque de la figure 1, au niveau d'un croisement d'ondes, ainsi qu'une vue en perspective et en coupe partielle d'un élément de renfort fixé par clipsage sous une onde,
  • la figure 13 représente un élément de renfort destiné à être agencé simultanément sous plusieurs ondes, et
  • la figure 14 représente, en perspective éclatée, deux éléments de renfort coopérant entre eux.
The invention will be better understood, and other objects, details, features and advantages thereof will appear more clearly in the following description of a particular embodiment of the invention, given solely for illustrative purposes and not limiting, with reference to the accompanying drawings. On these drawings:
  • the figure 1 is a perspective view of a corrugated plate of a tank according to an embodiment of the invention,
  • the figure 2 is a perspective view in section of a wave of the corrugated plate of the figure 1 , and a reinforcing element according to a first variant,
  • the Figures 3 to 9 represent, in perspective, different variants of the reinforcing element, and
  • the Figures 10 and 11 represent, in section, other variants of the reinforcing element,
  • the figure 12 shows a top view of the plaque of the figure 1 , at a wave crossing, and a perspective view in partial section of a reinforcing element fixed by clipping under a wave,
  • the figure 13 represents a reinforcing element intended to be arranged simultaneously under several waves, and
  • the figure 14 represents, in exploded perspective, two reinforcing elements cooperating with each other.

Description détaillée d'un mode de réalisation de l'inventionDetailed description of an embodiment of the invention

Une cuve selon un mode de réalisation de l'invention peut présenter une structure multicouche de manière similaire aux cuves des documents FR 2 781 557 et FR 2 861 060 cités en introduction. En particulier, la cuve présente une membrane étanche primaire réalisée avec des plaques métalliques ondulées qui reposent sur un panneau en contreplaqué d'une couche thermiquement isolante primaire. Les aspects généraux de cette structure multicouche étant connus, on décrit ci-dessous les particularités de la cuve selon un mode de réalisation de l'invention.A tank according to one embodiment of the invention may have a multilayer structure similarly to the vessels of the documents FR 2 781 557 and FR 2 861 060 cited in the introduction. In particular, the vessel has a primary waterproof membrane made of corrugated metal plates that rest on a plywood panel of a primary heat-insulating layer. Since the general aspects of this multilayer structure are known, the features of the tank according to one embodiment of the invention are described below.

La plaque 1 représentée sur la figure 1 est une plaque ondulée, réalisée en inox, de forme globalement rectangulaire. La membrane étanche primaire de la cuve est réalisée en soudant bord à bord plusieurs plaques de ce type.The plate 1 shown on the figure 1 is a corrugated plate, made of stainless steel, of generally rectangular shape. The primary waterproof membrane of the tank is made by welding several plates of this type side by side.

Comme le montre la figure 1, la plaque 1 comprend trois grandes ondes 2 s'étendant selon la longueur de la plaque 1, et neuf petites ondes 3 s'étendant selon la largeur de la plaque 1. On parle de grandes ondes 2 et de petites ondes 3 car la hauteur des grandes ondes 2 est supérieure à celle des petites ondes 3.As shown in figure 1 , the plate 1 comprises three large waves 2 extending along the length of the plate 1, and nine small waves 3 extending along the width of the plate 1. We speak of large waves 2 and small waves 3 because the height long wave 2 is greater than that of small waves 3.

En variante, la plaque 1 pourrait présenter un nombre différent de grandes ondes 2 et/ou de petites ondes 3. En variante également, les ondes de la plaque 1 pourraient présenter des nervures de renfort comme décrit dans FR 2 861 060 . Les ondes de la plaque 1 pourraient aussi présenter d'autres configurations, par exemple comme dans les documents FR 2 735 847 ou KR-10-2005-0050170 .Alternatively, the plate 1 could have a different number of large waves 2 and / or small waves 3. Also, alternatively, the waves of the plate 1 could have reinforcing ribs as described in FIG. FR 2 861 060 . The waves of the plate 1 could also have other configurations, for example as in the documents FR 2,735,847 or KR-10-2005-0050170 .

Sur la figure 2, on voit que la plaque 1 repose sur le contreplaqué 4 de la couche thermiquement isolante sous-jacente. En variante, la plaque 1 pourrait reposer sur un autre type de support. On voit également sur cette figure qu'un élément de renfort 5 est agencé sous la grande onde 2, entre la plaque 1 et le contreplaqué 4. Dans le cadre de la présente description, « sous » signifie que l'élément de renfort 5 est recouvert par l'onde, mais ne signifie pas nécessairement qu'il se trouve plus bas. En effet, sur les parois verticales de la cuve, l'élément de renfort 5 se trouve à l'horizontal de l'onde qui le recouvre.On the figure 2 it is seen that the plate 1 rests on the plywood 4 of the underlying thermally insulating layer. Alternatively, the plate 1 could be based on another type of support. It is also seen in this figure that a reinforcing element 5 is arranged under the large wave 2, between the plate 1 and the plywood 4. In the context of the present description, "sub" means that the reinforcing element 5 is covered by the wave, but does not necessarily mean that it is lower. Indeed, on the vertical walls of the tank, the reinforcing element 5 is at the horizontal of the wave which covers it.

Dans l'exemple de la figure 2, la longueur de l'élément de renfort 5 correspond à la distance entre deux petites ondes 3.In the example of the figure 2 the length of the reinforcing element 5 corresponds to the distance between two small waves 3.

Plusieurs éléments de renfort 5 peuvent être agencés, chacun sous une grande onde 2 entre deux petites ondes 3, Le nombre et la répartition des éléments de renfort 5 peuvent être déterminés en fonction de la répartition des contraintes prévues en fonctionnement dans la membrane de la cuve.Several reinforcing elements 5 can be arranged, each under a large wave 2 between two small waves 3. The number and the distribution of the reinforcing elements 5 can be determined as a function of the distribution of the stresses provided during operation in the membrane of the tank. .

En variante, la longueur de l'élément de renfort 5 peut être inférieure à la distance entre deux petites ondes 3 ou, si la géométrie du croisement entre ondes le permet, supérieure à cette distance. En variante également, des éléments de renfort 5 peuvent être prévus sous les petites ondes 3.Alternatively, the length of the reinforcing element 5 may be less than the distance between two small waves 3 or, if the geometry of the crossover between waves allows, greater than this distance. Alternatively also, reinforcing elements 5 may be provided under the small waves 3.

L'élément de renfort 5 est mis en place comme représenté sur la figure 2, sans être fixé ni à la plaque 1 ni au contreplaqué 4. Il peut donc éventuellement glisser sous la grande onde 2. La fabrication de la cuve ne nécessite donc pas d'étape de fixation des éléments de renfort 5. En variante, l'élément de renfort 5 peut être fixé à la membrane ou au contreplaqué 4.The reinforcing element 5 is put in place as shown on the figure 2 without being fixed to the plate 1 or the plywood 4. It can therefore possibly slide under the large wave 2. The manufacture of the tank therefore does not require a fixing step of the reinforcing elements 5. Alternatively, the reinforcing member 5 may be attached to the membrane or plywood 4.

De nombreuses formes peuvent convenir pour l'élément de renfort 5. Les figures 3 à 11 représentent différentes formes qui peuvent convenir. Les vues des figures 3 à 9 sont des vues en perspective d'une tranche de l'élément de renfort 5, dont la longueur peut être plus grande que celle représentée. Les vues des figures 10 et 11 sont des vues en coupe. Sur ces différentes figures, on utilise les mêmes signes de référence pour désigner des éléments similaires.Many forms may be suitable for the reinforcing element 5. The Figures 3 to 11 represent different shapes that may be suitable. The views of Figures 3 to 9 are perspective views of a slice of the reinforcing element 5, the length of which may be greater than that shown. The views of Figures 10 and 11 are sectional views. In these different figures, the same reference signs are used to designate similar elements.

L'élément de renfort 5 de la figure 3 présente une section pleine. Ses deux faces latérales 6 sont courbes et de forme correspondant à celle de l'onde 2. Toutefois, les faces latérales 6 ne s'étendent pas jusqu'au sommet de l'onde 2 et l'élément de renfort 5 présente une face supérieure 7 plane. Du gaz peut circuler entre le sommet de l'onde 2 et la face supérieure 7.The reinforcing element 5 of the figure 3 has a full section. Its two lateral faces 6 are curved and of shape corresponding to that of the wave 2. However, the lateral faces 6 do not extend to the top of the wave 2 and the reinforcing element 5 has an upper face 7 flat. Gas can flow between the top of the wave 2 and the upper face 7.

L'élément de renfort 5 de la figure 4 présente une enveloppe 8 dont la forme extérieure correspond à la forme de l'onde 2. Un passage 9 circulaire permet à du gaz de passer à travers l'élément de renfort 5. Dans la variante de la figure 5, le passage 9 a une forme correspondant à la forme extérieure de l'enveloppe 8, afin d'offrir une plus grande surface de passage.The reinforcing element 5 of the figure 4 has an envelope 8 whose outer shape corresponds to the shape of the wave 2. A circular passage 9 allows the gas to pass through the reinforcing element 5. In the variant of the figure 5 , the passage 9 has a shape corresponding to the outer shape of the envelope 8, to provide a larger passage area.

L'élément de renfort 5 de la figure 6 présente également une enveloppe 8 dont la forme extérieure correspond à la forme de l'onde 2 et un passage 9. Afin d'améliorer la résistance mécanique de l'élément de renfort 5, des voiles 10 internes traversent le passage 9. Les figures 7 à 9 représentent des configurations alternatives des voiles 10.The reinforcing element 5 of the figure 6 also has a casing 8 whose outer shape corresponds to the shape of the wave 2 and a passage 9. In order to improve the mechanical strength of the reinforcing element 5, internal webs 10 pass through the passage 9. Figures 7 to 9 represent alternative configurations of the sails 10.

Les éléments de renfort des figures 3 à 9 peuvent être réalisés par exemple en l'un des matériaux suivants : le polyéthylène, le polycarbonate, le polycarbonate renforcé de fibres de verres, le polyéther imide, et le polystyrène expansé. Ils peuvent être fabriqués par toute technique appropriée (injection, moulage, extrusion, usinage,...).The reinforcement elements Figures 3 to 9 can be made for example of one of the following materials: polyethylene, polycarbonate, glass fiber reinforced polycarbonate, polyether imide, and expanded polystyrene. They can be manufactured by any appropriate technique (injection, molding, extrusion, machining, ...).

Les éléments de renfort 5 des figures 10 et 11 présentent une section pleine. Leurs faces latérales 6 présentent chacune deux bandes planes. Comme pour l'élément de renfort de la figure 3, du gaz peut passer entre la face supérieure 7 et le sommet de l'onde. Les éléments de renfort 5 des figures 10 et 11. peuvent par exemple être réalisés en contreplaqué, par usinage.The reinforcing elements 5 of the Figures 10 and 11 have a full section. Their side faces 6 each have two flat strips. As for the reinforcing element of the figure 3 gas can pass between the upper face 7 and the top of the wave. The reinforcing elements 5 of the Figures 10 and 11 . can for example be made of plywood, by machining.

L'élément de renfort 5 de la figure 11 présente une languette 22 fixée à sa face inférieure 23. La languette 23 permet de fixer l'élément de renfort 5 au contreplaqué 4, par exemple au niveau de la jonction entre deux plaques de contreplaqué.The reinforcing element 5 of the figure 11 has a tongue 22 fixed to its lower face 23. The tongue 23 allows to fix the reinforcing element 5 to the plywood 4, for example at the junction between two plywood plates.

La figure 12 montre, en partie gauche, la géométrie des ondes au niveau d'un croisement entre une grande onde 2 et une petite onde 3. On peut constater que la membrane présente à ce niveau une contre-dépouille 20. La partie droite de la figure 12 montre que l'élément de renfort 5 agencé sous une grande onde 2 présente, au niveau de son extrémité, des pattes 21 qui permettent de fixer l'élément de renfort 5 à la membrane, par clipsage au niveau de la contre-dépouille 20. En variante, les pattes 21 pourraient être coincées.The figure 12 shows, on the left-hand side, the geometry of the waves at the level of a cross between a large wave 2 and a small wave 3. It can be seen that the membrane presents at this level an undercut 20. The right part of the figure 12 shows that the reinforcing element 5 arranged under a large wave 2 has, at its end, tabs 21 which allow fixing the reinforcing element 5 to the membrane, by clipping at the undercut 20. Alternatively, the tabs 21 could be stuck.

La figure 13 représente en perspective un élément de renfort 5 qui est destiné à être agencé simultanément sous plusieurs grandes ondes 2 et petites ondes 3. Sa forme correspond à celles des ondes, y compris au niveau des croisements. Des passages 9 internes sont prévus aussi bien dans les parties situées sous les petites ondes 3 que sous les grandes ondes 2.The figure 13 represents in perspective a reinforcing element 5 which is intended to be arranged simultaneously under several large waves 2 and small waves 3. Its shape corresponds to those of the waves, including at crossings. Internal passages 9 are provided both in the parts situated under the small waves 3 and under the long waves 2.

La figure 14 représente deux éléments de renfort 5, l'un étant destiné à être agencé sous une grande onde 2 et l'autre sous une petite onde 3, en se croisant au niveau du croisement des ondes. A ce niveau, les éléments de renfort 5 présentent chacun une encoche 24 permettant de les positionner l'un par rapport à l'autre. Comme on le voit sur cette figure, les éléments de renfort 5 ont une section rectangulaire.The figure 14 represents two reinforcing elements 5, one being intended to be arranged under a large wave 2 and the other under a small wave 3, crossing at the crossing of the waves. At this level, the reinforcing elements 5 each have a notch 24 for positioning them relative to each other. As seen in this figure, the reinforcing elements 5 have a rectangular section.

Les différentes formes d'élément de renfort 5 proposées ci-dessus permettent aux ondes de se déformer en cas de contraction thermique, et offrent un support aux ondes en cas de déformation due aux pressions hydrostatique et dynamique. Pour atteindre ce but, on peut prévoir que, lorsque la cuve est vide (donc en l'absence de chargement thermique et de pression hydrostatique ou dynamique), la distance minimale entre l'élément de renfort 5 et l'onde sous laquelle il se trouve soit comprise entre 0 % et 5 % de la hauteur de l'onde.The various forms of reinforcing element 5 proposed above allow the waves to deform in the event of thermal contraction, and offer support to the waves in case of deformation due to hydrostatic and dynamic pressures. To achieve this goal, it can be expected that, when the tank is empty (so in the absence of thermal loading and hydrostatic or dynamic pressure), the minimum distance between the reinforcing element 5 and the wave under which it is between 0% and 5% of the height of the wave.

Les différentes formes d'élément de renfort 5 présentent chacune des propriétés particulières : coût et facilité de fabrication, résistance mécanique, quantité de matière,... En fonction des applications, on peut choisir la forme la plus appropriée.The different forms of reinforcement element 5 each have particular properties: cost and ease of manufacture, mechanical strength, quantity of material, etc. Depending on the applications, the most appropriate form may be chosen.

Des simulations numériques ont été réalisées pour vérifier l'effet de l'élément de renfort 5 sur les contraintes engendrées dans la membrane, par comparaison avec une membrane sans élément de renfort. Ces simulations ont montré que:

  • en cas de chargement thermique (contraction de la membrane due au froid), la présence d'un élément de renfort 5 n'introduit pas de contraintes indésirables dans la membrane,
  • en cas de chargement thermique et de chargement en pression uniforme (correspondant à la pression hydrostatique de la cargaison), la présence d'un élément de renfort 5 permet de diminuer les contraintes dans la membrane, et
  • en cas de chargement thermique et de chargement en pression asymétrique (correspondant à la pression dynamique de la cargaison), la présence d'un élément de renfort 5 permet de diminuer les contraintes dans la membrane.
Numerical simulations were performed to verify the effect of the reinforcing element 5 on the stresses generated in the membrane, in comparison with a membrane without reinforcing element. These simulations showed that:
  • in case of thermal loading (contraction of the membrane due to cold), the presence of a reinforcing element 5 does not introduce undesirable stresses in the membrane,
  • in the case of thermal loading and uniform pressure loading (corresponding to the hydrostatic pressure of the cargo), the presence of a reinforcing element 5 makes it possible to reduce the stresses in the membrane, and
  • in the case of thermal loading and asymmetric pressure loading (corresponding to the dynamic pressure of the cargo), the presence of a reinforcing element 5 makes it possible to reduce the stresses in the membrane.

Bien que l'invention ait été décrite en liaison avec un mode de réalisation particulier, 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 a particular embodiment, 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.

Claims (15)

Cuve étanche, dont au moins une paroi comprend une membrane étanche destinée à être en contact avec du produit contenu dans la cuve et un support adjacent à la membrane, dans laquelle la membrane comprend au moins une plaque (1) présentant au moins une onde (2, 3), caractérisée par le fait qu'elle comprend un élément de renfort (5) inséré sous l'onde, entre la membrane et le support, l'élément de renfort comprenant une enveloppe externe dont la forme extérieure correspond sensiblement à la forme de l'onde sous laquelle l'élément de renfort est inséré, l'élément de renfort présentant un passage interne (9) qui permet à du gaz de circuler entre l'onde et le support en traversant l'élément de renfort.Watertight tank, at least one wall of which comprises a sealed membrane intended to be in contact with the product contained in the tank and a support adjacent to the membrane, in which the membrane comprises at least one plate (1) having at least one wave ( 2, 3), characterized in that it comprises a reinforcing element (5) inserted under the wave, between the membrane and the support, the reinforcing element comprising an outer casing whose external shape substantially corresponds to the waveform in which the reinforcing element is inserted, the reinforcing element having an internal passage (9) which allows gas to flow between the wave and the support while passing through the reinforcing element. Cuve selon la revendication 1, dans laquelle le passage interne (9) présente une forme correspondant à la forme extérieure de l'enveloppe de l'élément de renfort, de sorte que l'enveloppe présente une paroi d'épaisseur uniforme sur sensiblement toute la périphérie de l'enveloppe.Tank according to claim 1, wherein the internal passage (9) has a shape corresponding to the outer shape of the envelope of the reinforcing element, so that the envelope has a wall of uniform thickness over substantially the entire periphery of the envelope. Cuve selon la revendication 2, dans laquelle l'enveloppe de l'élément de renfort comporte une surface de base plane en contact avec le support, la paroi de l'enveloppe présentant une portion épaissie au niveau de deux extrémités de la surface de base.A vessel according to claim 2, wherein the envelope of the reinforcing member has a planar base surface in contact with the support, the wall of the envelope having a thickened portion at two ends of the base surface. Cuve selon la revendication 2 ou 3, dans laquelle l'élément de renfort comprend au moins un voile (10) de renfort à l'intérieur de ladite enveloppe.Tank according to claim 2 or 3, wherein the reinforcing element comprises at least one reinforcing web (10) inside said envelope. Cuve selon la revendication 4, dans laquelle ledit au moins un voile (10) traverse le passage interne (9) de manière à diviser le passage interne (9) en plusieurs sections.Tank according to claim 4, wherein said at least one web (10) passes through the internal passage (9) so as to divide the internal passage (9) into several sections. Cuve selon la revendication 1, dans laquelle le passage interne (9) présente une section circulaire.Tank according to claim 1, wherein the internal passage (9) has a circular section. Cuve selon l'une des revendications précédentes, dans laquelle l'élément de renfort est réalisé en un matériau choisi parmi : le contreplaqué, le polyéthylène, le polycarbonate, le polycarbonate renforcé de fibres de verres, le polyéther imide et le polystyrène expansé.Tank according to one of the preceding claims, wherein the reinforcing element is made of a material selected from: plywood, polyethylene, polycarbonate, glass fiber reinforced polycarbonate, polyether imide and expanded polystyrene. Cuve selon l'une des revendications précédentes, dans laquelle, en l'absence de produit contenu dans la cuve, la distance minimale entre l'élément de renfort et l'onde est comprise entre 0 % et 5 % de la hauteur de l'onde.Tank according to one of the preceding claims, wherein, in the absence of product contained in the tank, the minimum distance between the reinforcing element and the wave is between 0% and 5% of the height of the tank. wave. Cuve selon l'une des revendications précédentes, dans laquelle la plaque présente une première série d'ondes (2) parallèles entre elles, et une deuxième série d'ondes (3) parallèles entre elles et transverses aux ondes de la première série, l'élément de renfort (5) étant inséré sous une onde (2) de la première série.Tank according to one of the preceding claims, wherein the plate has a first series of waves (2) parallel to each other, and a second series of waves (3) parallel to each other and transverse to the waves of the first series, l reinforcing element (5) being inserted under a wave (2) of the first series. Cuve selon la revendication 9, dans laquelle l'élément de renfort présente une longueur correspondant à la distance entre deux ondes de la deuxième série.Tank according to claim 9, wherein the reinforcing element has a length corresponding to the distance between two waves of the second series. Cuve selon l'une des revendications précédentes, dans laquelle l'élément de renfort est inséré sous l'onde de manière glissante par rapport à la membrane et au support.Tank according to one of the preceding claims, wherein the reinforcing element is inserted under the wave slidably with respect to the membrane and the support. Cuve selon l'une des revendications 1 à 10, dans laquelle l'élément de renfort est fixé à la membrane ou au support.Tank according to one of claims 1 to 10, wherein the reinforcing element is fixed to the membrane or the support. Cuve selon la revendication 12, dans laquelle la membrane présente une contre-dépouille (20), l'élément de renfort étant clipsé à, ou coincé dans, la contre-dépouille.Tank according to claim 12, wherein the diaphragm has an undercut (20), the reinforcing element being clipped to, or wedged in, the undercut. Cuve selon l'une des revendications précédentes, dans laquelle au moins deux éléments de renfort sont agencés respectivement sous deux ondes adjacentes de la membrane, l'un desdits deux éléments de renfort formant une butée pour l'autre desdits deux éléments de renfort.Tank according to one of the preceding claims, wherein at least two reinforcing elements are respectively arranged in two adjacent waves of the membrane, one of said two reinforcing elements forming a stop for the other of said two reinforcing elements. Ouvrage flottant comprenant une cuve selon l'une des revendications précédentes.Floating structure comprising a tank according to one of the preceding claims.
EP12154056.1A 2008-10-08 2009-06-30 Tank with reinforced corrugated membrane Active EP2453159B1 (en)

Applications Claiming Priority (3)

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FR0805567A FR2936784B1 (en) 2008-10-08 2008-10-08 REINFORCED CORRUGATED MEMBRANE TANK
PCT/FR2009/051267 WO2010040922A1 (en) 2008-10-08 2009-06-30 Vessel with a reinforced corrugated membrane
EP09784452.6A EP2337984B1 (en) 2008-10-08 2009-06-30 Vessel with a reinforced corrugated membrane

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EP09784452.6 Division 2009-06-30

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AU (1) AU2009301016B2 (en)
BR (1) BRPI0920667B1 (en)
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KR101236746B1 (en) 2010-11-17 2013-02-25 삼성중공업 주식회사 membrane reinforcement of LNG ship

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