WO2019086788A1 - Sealed and thermally insulating tank - Google Patents

Sealed and thermally insulating tank Download PDF

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Publication number
WO2019086788A1
WO2019086788A1 PCT/FR2018/052669 FR2018052669W WO2019086788A1 WO 2019086788 A1 WO2019086788 A1 WO 2019086788A1 FR 2018052669 W FR2018052669 W FR 2018052669W WO 2019086788 A1 WO2019086788 A1 WO 2019086788A1
Authority
WO
WIPO (PCT)
Prior art keywords
insulating
support
row
angle
vessel
Prior art date
Application number
PCT/FR2018/052669
Other languages
French (fr)
Inventor
Antoine PHILIPPE
Marc BOYEAU
Sébastien DELANOE
Mickaël HERRY
Original Assignee
Gaztransport Et Technigaz
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to FR1760382 priority Critical
Priority to FR1760382A priority patent/FR3073271B1/en
Application filed by Gaztransport Et Technigaz filed Critical Gaztransport Et Technigaz
Publication of WO2019086788A1 publication Critical patent/WO2019086788A1/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C3/00Vessels not under pressure
    • F17C3/02Vessels not under pressure with provision for thermal insulation
    • F17C3/025Bulk storage in barges or on ships
    • F17C3/027Wallpanels for so-called membrane tanks
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2201/00Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01Shape
    • F17C2201/0147Shape complex
    • F17C2201/0157Polygonal
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2201/00Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05Size
    • F17C2201/052Size large (>1000 m3)
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2203/00Vessel construction, in particular walls or details thereof
    • F17C2203/03Thermal insulations
    • F17C2203/0304Thermal insulations by solid means
    • F17C2203/0358Thermal insulations by solid means in form of panels
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2221/00Handled fluid, in particular type of fluid
    • F17C2221/03Mixtures
    • F17C2221/032Hydrocarbons
    • F17C2221/033Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2223/00Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146Two-phase
    • F17C2223/0153Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2223/00Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/033Small pressure, e.g. for liquefied gas
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2260/00Purposes of gas storage and gas handling
    • F17C2260/01Improving mechanical properties or manufacturing
    • F17C2260/013Reducing manufacturing time or effort
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2270/00Applications
    • F17C2270/01Applications for fluid transport or storage
    • F17C2270/0102Applications for fluid transport or storage on or in the water
    • F17C2270/0105Ships
    • F17C2270/0107Wall panels

Abstract

The invention relates to a sealed and thermally insulating tank in which the insulating barrier comprises insulating elements arranged in a plurality of parallel rows, in which an anchoring member comprises a bearing element (50) mounted on the support surface between two insulating elements (30) of a first of said parallel rows and movable with respect to the support surface transversely to said first row between: a retracted position in which the bearing element (50) is housed entirely between the two insulating elements (30) so as to leave free the location (99) of a second of said parallel rows, the second row being adjacent to the first row, and a deployed position in which the bearing element projects over the location (99) of the second row and is in engagement with at least one insulating element of the second row in order to retain said insulating element of the second row on the support surface.

Description

 Watertight and thermally insulating tank

 Technical area

 The invention relates to the field of sealed and thermally insulating tanks, with membranes, for storing and / or transporting fluid, such as a cryogenic fluid.

 Watertight and thermally insulating membrane tanks are used in particular for the storage of liquefied natural gas (LNG), which is stored at atmospheric pressure at about -162 ° C. These tanks can be installed on the ground or on a floating structure. In the case of a floating structure, the tank may be intended for the transport of liquefied natural gas or to receive liquefied natural gas used as fuel for the propulsion of the floating structure.

Technological background

 Various techniques are known for the construction of a sealed and thermally insulating diaphragm tank integrated in a bearing structure having a substantially polyhedral inner surface and comprising successively, in a thickness direction, a secondary insulation barrier, a barrier of secondary sealing, a primary insulation barrier and a primary sealing barrier.

 WO-A-2014167214 or WO-A-2017006044 discloses a vessel wall in which the secondary insulating barrier consists essentially of secondary insulating blocks juxtaposed on the polyhedron inner surface of the supporting structure, the barrier secondary sealing consists of a corrugated metal membrane disposed on an inner surface of the secondary insulating blocks, the primary insulation barrier consists essentially of primary insulation blocks juxtaposed on the secondary metal membrane and anchored to the secondary insulation barrier by anchoring members carried by the secondary insulating blocks, and the primary sealing barrier consists of a corrugated metal membrane disposed on an inner surface of the primary insulating blocks. Along the edges of the supporting structure, the primary and secondary insulating blocks consist of prefabricated corner structures.

summary Certain aspects of the invention will now be explained with reference to FIG. 1. FIG. 1 partially illustrates an isolation barrier consisting essentially of insulating blocks juxtaposed on a polyhedral support surface 1 having two plane regions 2 and 3 forming an angle between them and joining at an edge 4. The insulating blocks comprise a corner structure 5 disposed along the edge which has two respectively parallel to each of the two planar regions 2 and 3 and flat insulating panels 6 arranged on the flat regions of the support surface on either side of the corner structure 5.

 As can be seen in FIG. 1, if the planar insulating panels 6 have been mounted first, there may be a space problem preventing the corner structure 5 from being placed along the edge, as indicated by the arrow 7 It follows that it may be preferable to build the insulation barrier by finishing with a flat region. However, once the corner structure 5 has been placed along the edge, an entire area of the support surface near the edge 4 is no longer accessible.

 In addition, it is preferable to make an insulation barrier with insulating blocks as standardized as possible to reduce manufacturing costs. However, the construction of a large supporting structure such as the hull of a ship is subject to high dimensional tolerances, for example several centimeters, which prevent fully planning the dimensions of a tank before its construction. It follows that it may be necessary to build at least some of the insulating blocks tailored to the actual dimensions of the carrier structure.

 An idea underlying the invention is to provide a sealed and thermally insulating tank with a multilayer structure that facilitates taking into account at least some of the aforementioned constraints. Another idea underlying the invention is to provide a tight and insulating multilayer structure that is easy to perform on large surfaces.

For this, the invention provides a sealed and thermally insulating vessel for storing a fluid, the sealed and thermally insulating vessel having an insulation barrier and a sealing barrier disposed on an inner surface of the insulation barrier. , the isolation barrier being disposed on a support surface, for example substantially polyhedral, carrying organs anchoring and retaining on the support surface by said anchoring members, wherein the insulation barrier comprises insulating elements arranged in several parallel rows,

wherein said anchoring member comprises a support member mounted on the support surface between two insulating members of a first of said parallel rows and movable relative to the support surface transversely to said first row between:

a retracted position in which the support element is housed entirely between the two insulating elements so as to leave the location of a second of said parallel rows free, the second row being adjacent to the first row, and

an extended position in which the support member projects over the location of the second row and engages at least one insulating member of the second row to retain said second row insulative member on the support surface.

 With these features, the second row insulative member can be easily placed when the support member is retracted and can be reliably retained on the support surface when the support member is deployed. In addition, since the support member is engaged with the insulating member laterally from one side of the insulating member facing the first row, and not through the insulating member in the thickness direction. , the structure of the insulating element of the second row can be relatively simple.

 According to embodiments, such a tank may comprise one or more of the following characteristics.

 The anchoring member can be made in different ways. According to one embodiment, the anchoring member further comprises a stud fixed to the support surface and projecting inwards in a space between the two insulating elements of the first row, and a nut screwed onto the stud. and adapted to clamp the support member toward the support surface to lock the position of the support member.

The support element can be realized in different ways. According to one embodiment, the support element comprises a support bar having a slot through which the stud passes, so that when the nut does not tighten the support bar, the support bar can be slid in a direction transverse to the first row between the retracted position, in which the support bar is housed entirely between the two insulating elements, and the deployed position or positions in which a portion of the bar bearing protrudes beyond the first row to engage said at least one insulating member of the second row. According to one embodiment, the support bar has a U-shaped section.

 The insulating elements may be made in different ways, such as flat panels on planar portions of the support surface or in the form of dihedral blocks on edge regions of the support surface.

 According to one embodiment, the insulating element of the second row is a planar insulating board which has a layer of insulating polymeric foam sandwiched between a rigid bottom plate and a rigid cover plate, the rigid cover plate and the layer of insulating polymeric foam having a recess in the thickness of the insulating panel to reveal a bearing area on the inner surface of the rigid bottom plate, said recess opening on an edge of the plane insulating board parallel to the first row and turned towards the first row, the anchor member being engaged with said bearing zone of the bottom plate.

 According to one embodiment, the recess formed in the thickness of the insulating panel is a groove oriented perpendicularly to said edge of the insulating panel plane. Such grooves may be provided at different locations, for example at the ends of the edge of the plane insulating panel facing the first row and / or in a central portion of this edge of the plane insulating board.

 According to one embodiment, the planar insulating panel has a rectangular parallelepipedal shape, the recess being formed in a corner of the plane insulating panel.

According to one embodiment, the support surface carries a plurality of anchoring members distributed along the first row of insulating elements and comprising support elements mounted on the support surface between the insulating elements of the first row and movable relative to the support surface between the retracted position and the deployed position or positions, said bearing members engaging respective areas of said second row insulative member for retaining said insulating member on the support surface. Thus, the retention of the insulating element of the second row on the support surface can be provided entirely by the movable support elements or by a combination of the movable support elements and other anchoring members.

 According to one embodiment, the support surface has at least two plane regions forming an angle between them and joining at an edge region, and the first row of insulating elements comprises a row of corner structures. arranged along said edge region of the support surface and the second row of insulating elements comprises a row of planar insulating panels disposed on a said flat region of the support surface.

 Thanks to these characteristics, it is possible to anchor an insulating panel plane adjacent to the row of corner structures by means of one or more anchoring members located between the successive corner structures. This arrangement simplifies the positioning and implementation of the anchoring members, especially when the plane insulating panel adjacent to the row of corner structures must be dimensioned to measure and therefore can not be standardized.

 In the case where the support surface is provided by a secondary barrier itself consisting of secondary angle structures and secondary planar insulating panels, this arrangement also has the advantage of allowing to position these anchors relatively close to the ridge area, especially on secondary corner structures. Thus, since the secondary planar insulating panels adjacent to the secondary corner structures do not need to carry these anchors for the primary planar insulating boards, the custom dimensioning of these secondary planar insulating boards can be facilitated.

 The corner structure can be realized in different ways. According to one embodiment, a said angle structure comprises:

a dihedral insulating block having two flats parallel to the two planar regions and forming an angle therebetween, said flange having a planar outer surface bearing against a corresponding plane region of the support surface and an inner planar surface parallel to said corresponding plane region and spaced from said planar outer surface in a thickness direction, and a metal bracket fixed to the flat interior surfaces of the dihedral insulation block to form said sealing barrier at the edge region of the support surface.

 According to one embodiment, the metal angle has a protruding portion which projects relative to the dihedral insulating block in the direction of the edge zone,

two successive angle structures in said row are arranged to have a spacing in the direction of the edge region between the dihedral insulating blocks, said spacing being at least partially covered by the projecting portion of the metal angle of a two successive angle structures, and said support member of the anchoring member is mounted on the support surface between the dihedral insulating blocks of the two corner structures.

 According to one embodiment, a block of insulating material is disposed in the spacing between the dihedral insulating blocks between the projecting portion of the metal bracket and the support element. Thanks to these characteristics, the insulation barrier can be made substantially continuous despite the spacing between the insulating blocks, to limit the convection phenomena.

 It may be desired to facilitate access to the anchoring member between the dihedral insulating blocks of the two corner structures. For this, according to one embodiment, at least one of the two successive angle structures has a cutout formed in the projecting portion of the metal angle to the right of said anchor member disposed between the dihedral insulating blocks, to provide access to said anchoring member.

According to another embodiment, a said metal angle whose protruding portion covers said spacing comprises a bore on its inner surface to receive a fixing member intended to cooperate with the dihedral insulating block to fix said metal angle on the dihedral insulating block of the angle structure, the fixing member being adapted to be engaged in the drilling from the inner surface of the metal angle. For example, the fastener comprises a screw or a rivet whose head is turned towards the inside of the tank and whose body passes through the bore of the metal angle to cooperate with the dihedral insulating block. According to one embodiment, the dihedral insulating block carries an insert mounted on the flat inner surface of at least one pan for receiving and stopping said body of the fastener in the thickness direction of said at least one pan.

 According to one embodiment, the insert is mounted on said planar inner surface with a clearance in a direction parallel to the planar inner surface. Such a game allows in particular a position adjustment of the metal angle after assembly, for example in response to the cold setting, and thus reduces the thermal stress.

 According to one embodiment, said at least one part of the dihedral insulating block has a groove extending parallel to the edge region and opening onto said flat inner surface, the insert being slidably accommodated in said groove.

 According to one embodiment, said groove has a width which decreases along the direction of thickness towards the planar inner surface, so as to block said insert in the direction of thickness.

 According to one embodiment, the support surface comprises a third plane region transverse to the edge region at one end of the edge region, and a last angle structure of the angle structure row comprises, in addition to said dihedral insulating block, a third pan parallel to the third planar region and forming angles with said two sides of the dihedral insulating block.

 According to one embodiment, said dihedral insulating block of the penultimate corner structure of the row of corner structures has a larger dimension in the direction of the edge area than corner structures in the along a central portion of the ridge zone, the metal angle of said penultimate corner structure being composed of two corner segments juxtaposed in the direction of the ridge zone and fixed on the flat interior surfaces of the dihedral insulating block.

 According to one embodiment, a first angle segment of said penultimate corner structure is attached to said dihedral insulating block by means of a fastener located on the outer surface of the first corner segment and inaccessible from the inner surface. the first angle segment,

and a second angle segment of said penultimate corner structure located on the end side of the edge region has said bore on its inner surface for receiving said fixing member intended to cooperate with the dihedral insulating block for fixing said second angle segment on the dihedral insulating block of the angle structure, the fixing member being adapted to be engaged in the drilling from the inner surface the second corner segment.

 According to one embodiment, a first angle segment of said penultimate corner structure has holes for the passage of anchors for securing said dihedral insulation block to the support surface and a second angle segment. said second-to-last corner structure located on the end-side of the edge region has a continuous surface outside the or each bore receiving the or each fastener.

 With these features, the penultimate corner structure can quite easily be adjusted to the size of the support structure in the direction of the edge area, to account for manufacturing tolerances of this support structure.

 According to one embodiment, the sealing barrier comprises a closure part arranged astride the metal angles of the two successive angle structures so as to seal the metal angles of the two corner structures,

said closure piece covering a gap between the metal angles and the cutout of said or each protruding portion which covers the spacing between the dihedral insulating blocks.

 According to one embodiment, the sealing barrier in line with one or each flat region of the support surface comprises a metal membrane carrying corrugations parallel to the ridge zone and corrugations perpendicular to the ridge zone and planar areas located between said corrugations, an edge of the metal diaphragm parallel to the ridge zone being welded to the metal angles of the successive corner structures, said corrugations perpendicular to the ridge zone being aligned with interstices between the metal angles of the successive corner structures.

According to one embodiment, the closure piece comprises a corrugation perpendicular to the ridge zone aligned with a corrugation of the membrane metal and two planar portions located on either side of the corrugation and respectively welded to the metal angles of the two corner structures.

 The aforementioned features may be employed in the construction of an insulation barrier constructed directly on a supporting structure providing the support surface, or in the construction of a primary insulation barrier constructed on a pre-existing secondary barrier providing said surface of support.

 According to one embodiment, said insulation barrier is a primary insulation barrier and said sealing barrier is a primary sealing barrier, the vessel further comprising a secondary insulation barrier having a substantially polyhedral internal surface covered a secondary sealing barrier and forming said support surface.

 Such a tank can be part of a land storage facility, for example to store LNG or be installed in a floating structure, coastal or deep water, including a LNG tank, a floating storage and regasification unit (FSRU) , a floating production and remote storage unit (FPSO) and others.

 According to one embodiment, a vessel for the transport of a cold liquid product comprises a double hull and a aforementioned tank disposed in the double hull.

 According to one embodiment, the invention also provides a method for loading or unloading such a vessel, in which a fluid is conveyed through isolated pipes from or to a floating or land storage facility to or from the tank of the vessel. ship.

 According to one embodiment, the invention also provides a transfer system for a fluid, the system comprising the abovementioned vessel, insulated pipes arranged to connect the vessel installed in the hull of the vessel to a floating or ground storage facility. and a pump for driving fluid through the insulated pipelines from or to the floating or land storage facility to or from the vessel vessel.

 The invention also provides a manufacturing method for manufacturing a watertight and thermally insulating tank mentioned above, the method comprising:

provide a support surface, mounting an anchoring member on the support surface, said anchoring member having a bearing member movably mounted relative to the support surface, mounting the first row of insulating members on the support surface, such that the support element is housed entirely between two insulating elements of the first row of insulating elements and that said support element is mounted movably transverse to said first row,

disposing a second row of insulating elements on the support surface, the second row being parallel and adjacent to the first row,

moving the support member to an extended position in which the support member protrudes over the location of the second row and is engaged with at least one insulating member of the second row for retaining said insulating member of the second row on the support surface, and

lock the support element in the extended position.

 The invention also provides an angle structure comprising:

a dihedral insulating block having two flats respectively parallel to and at an angle to each of two planar regions, each flange having a planar outer surface and an inner planar surface spaced from said planar outer surface in a thickness direction, and

a metal bracket fixed to the flat interior surfaces of the dihedral insulation block to form a sealing barrier, the metal bracket having a protruding portion which protrudes from the dihedral insulation block in the direction of the edge,

wherein said metal angle comprises a bore on its inner surface to receive a fastener for cooperating with the dihedral insulating block to fix said metal angle on the dihedral insulating block of the corner structure, the fastener being suitable to be engaged in drilling from the inner surface of the metal angle.

Brief description of the figures

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. - Figure 1 is a schematic sectional view of a modularly constructed thermal insulation barrier with modules generally parallelepiped on a polyhedral support surface, at a ridge.

 - Figure 2 is a perspective view of a sealed and thermally insulating tank wall at a corner area of the tank, the primary sealing membrane being omitted.

 - Figure 3 is a view similar to Figure 2, wherein a primary corner structure is omitted but primary planar insulating panels adjacent to the primary corner structure are shown.

 FIG. 4 is an enlarged perspective view showing a row of primary corner structures seen from a section plane IV-IV of FIG. 2 and for another angle value.

 FIG. 5 is an enlarged perspective view of a detail of the row of primary corner structures.

 FIG. 6 is a top view of a sealed and thermally insulating tank wall at a corner area of the tank, showing the location of a planar insulating board when grab bars are retracted. .

 - Figure 7 is a perspective view showing an arrangement of secondary angle structures at the intersection between three walls of the vessel.

 FIG. 8 is a perspective view showing an arrangement of the primary corner structures on the secondary corner structures of FIG. 7.

 - Figure 9 is a perspective view of the vessel at the intersection between three walls of the vessel, partially showing the primary waterproofing membrane and a primary plane insulating panel.

 - Figure 10 is a view similar to Figure 9, wherein the primary sealing membrane covering the primary plane insulating board is shown.

- Figure 11 is a perspective view of a sealed and thermally insulating tank wall according to another embodiment, at a corner region of the tank and wherein the sealing membranes are omitted. - Figure 12 is a schematic cutaway representation of a tank of LNG tanker and a loading / unloading terminal of this tank.

 - Figure 13 is a perspective view of an angle structure according to another embodiment.

 FIG. 14 is a perspective view of an insert housed in the corner structure of FIG. 13.

 FIG. 15 shows a sealed and thermally insulating tank wall employing the angle structure of FIG. 13, viewed from above with respect to a planar primary insulating board.

 - Figure 16 is a perspective view of the vessel wall of Figure 15 after placing a metal bracket fixed from the inside of the tank.

Detailed description of embodiments

 By convention, the terms "external" and "internal" are used to define the relative position of one element relative to another, with reference to the interior and exterior of the vessel.

 The multilayer structure of a sealed and thermally insulating tank for storing liquefied natural gas will be described below. Each wall of the tank comprises, from the outside to the inside of the tank, a secondary thermally insulating barrier comprising secondary insulating elements juxtaposed and anchored to a bearing structure by secondary anchoring members, a secondary sealing membrane carried by the secondary insulating elements, a primary thermally insulating barrier comprising primary insulating elements juxtaposed and anchored to the secondary insulating elements by primary anchoring members 19 and a primary sealing membrane carried by the primary insulating elements and intended to be contact with the liquefied natural gas contained in the tank.

The supporting structure may in particular be formed of self-supporting metal sheets or, more generally, any type of rigid partition having appropriate mechanical properties. The supporting structure may in particular be formed by the hull or the double hull of a ship. The supporting structure comprises a plurality of walls defining the general shape of the vessel, usually a polyhedral shape.

 The planar areas of the tank can be made in different ways, for example according to the teaching of WO-A-2016046487 or WO-A-2017006044. In particular, a zone of angle of the vessel along an edge of the supporting structure will be described below.

 FIGS. 2 and 3 show the structure of the walls of the tank at an edge 10 between a first bearing wall January 1 and a second bearing wall

 The angle formed between the first carrier wall 11 and the second carrier wall 12 is about 90 ° in the illustrated embodiment. The angle may however have any other value, for example of the order of 135 °.

 The secondary heat-insulating barrier has a row of secondary corner structures 13 disposed along the edge 10, a single secondary corner structure 13 being shown in Figures 2 and 3. The secondary corner structure 13 and the secondary sealing membrane 15 disposed on its inner surface 14 may be made in different ways, for example according to the teaching of WO-A-2017006044.

 The secondary angle structure 13 here comprises a sandwich structure consisting of a layer of insulating polymer foam 16 sandwiched between two rigid plates 17, 18, for example of plywood. The inner plate 18 has a network of perpendicular grooves 19 intended to receive the corrugations 24 of the secondary sealing membrane 15. The corrugations 24 project outwards from the tank towards the supporting structure and are each received in a groove 19.

 In an alternative embodiment not shown, the orientation of the corrugations of the secondary sealing membrane is towards the inside of the tank.

The inner plate 18 is furthermore equipped with a plurality of metal plates 20, for example made of stainless steel or alloy with a low coefficient of thermal expansion, in particular invar®, intended for anchoring the edges of the diaphragm. secondary sealing. The metal plates 20 are fixed in recesses formed in the inner plate 18 and fixed thereto by screws, rivets or staples for example. Alternatively, the metal plates 20 are fixed directly on the layer of insulating polymer foam 16, for example by gluing.

 The inner plate 18 is also equipped with anchoring plates 21 intended to ensure the attachment of primary angle structures 30 against the secondary angle structure 13. The anchor plates 21 are for example glued to the inner plate 18 and or fixed thereto by screws, rivets or staples for example.

 Furthermore, the secondary waterproofing membrane 15 has a plurality of orifices through each of which passes an anchoring member for anchoring the primary corner structures 30. A blind nut 22 passes through each of the orifices and presents on its outer periphery a thread cooperating with a threaded bore 23 formed in one of the anchor plates 21. Furthermore, the blind nut 22 has a threaded blind bore for receiving a stud for fixing the primary angle structures 30 The blind nut 22 further comprises a flange for sandwiching the secondary sealing membrane 15 between said flange and the anchoring plate 21. The periphery of this flange is welded to the secondary sealing membrane 15 in order to to seal.

 The primary thermally insulating barrier comprises along the edge 10 of the vessel a plurality of primary corner structures 30. The primary corner structure 30 is a preassembled assembly comprising a dihedral insulating block 31 and an angle iron 32. dihedral insulation 31 has an inner face on which the angle 32 rests and an outer face resting against the secondary sealing membrane 15. The dihedral insulation block 31 has a composite structure in its thickness, comprising a layer of insulating polymer foam 33 taken in sandwich between two plywood plates 34, 35 bonded to said polymeric foam layer 33.

The brackets 32 are metal angles, for example, made of stainless steel. The bracket 32 has two wings resting against the inner face of the dihedral insulation block 31. Each wing of an angle bracket 32 has unrepresented studs which are welded to the outer face of said wing and project into the interior of the tank for fix the bracket 32 to the dihedral insulation block 31, before mounting the primary corner structure 30 in the tank. Each wing of the bracket 32 also has a stud 36 on its inner face, projecting towards the inside of the tank. The studs 36 make it possible to anchor a welding equipment during the welding of the elements of the primary waterproofing membrane on the brackets 32.

 As described in WO-A-2017006044, the angle 32 is provided with orifices 37, for example eight in number by angle 32, for mounting nuts on studs (not shown) carried by the plates 21, in order to securing the primary corner structure 30 to the secondary corner structure 13.

 As best seen in Figures 2 and 4, the primary corner structures 30 are disposed on the secondary corner structures 13 in the form of a row along the edge 10. In this row, two primary corner structures 30 successive have a space 38 between the two dihedral insulating blocks 31. Generally, insulating joint elements 39 are inserted in the space 38 between the two dihedral insulating blocks 31, so as to ensure continuity of the thermal insulation.

 In at least some of the spaces 38, the secondary angle structure 13 may carry an anchoring member for cooperating with a primary insulating member. This case will be described more specifically with reference to FIGS. 3 to 5. The anchoring element as a whole is cut in its median plane of symmetry in FIG. 4, so that the half-view is sufficient to understand its structure. .

 In this embodiment, the anchoring member comprises a plate 40 fixed on the inner surface of the secondary angle structure 13 between two plates 21. The plate 40 can be fixed on the secondary angle structure 13 of different such as turntables 21. It has a tapped hole 41 for receiving a blind nut 42 shown in half-view in Figure 4. The plate 40 may be present at the right of each space 38 or the right of some, for example a out of three, spaces 38.

The blind nut 42 passes through an orifice of the secondary sealing membrane, not shown, and has on its outer periphery a thread 43 cooperating with the threaded hole 41 formed in the plate 40. Moreover, the blind nut 42 has a blind bore. threaded 44 receiving a stud 45. The blind nut 42 further comprises a flange 46 for sandwiching the secondary sealing membrane between said collar and the plate 40. The periphery of this collar is welded to the secondary sealing membrane 15 to ensure sealing.

 As can be seen in FIG. 4, the stud 45 protrudes inwards in the space 38 between the two dihedral insulating blocks 31 and serves to fix a support bar 50 oriented perpendicular to the edge 10. The bar support 50 here has a U-shaped section whose base is turned towards the supporting structure. In the mounted state as shown, a first portion of the support bar 50 extends in the space 38 between the two dihedral insulating blocks 31 and has a slot 58 through which the stud 45 passes. the stud 45 makes it possible to tighten the support bar 50 towards the internal surface of the secondary angle structure 13.

 A second portion 51 of the support bar 50 protrudes beyond the row of primary corner structures 30 to abut a planar primary insulating panel 29 adjacent to the row of primary corner structures 30. slot length 58 allows a length adjustment of the second portion 51 projecting beyond the row of primary corner structures 30.

 Preferably, the slot 58 whose two ends 58a and 58b are indicated in the sectional view of FIG. 4, is long enough to allow the support bar 50 to be completely retracted into the space 38 between the two insulating blocks. Thus, before the nut 47 is tightened, it is possible to slide the support bar 50 between this retracted position (shown in FIG. 6), which facilitates the installation of the primary plane insulating panel 29 by completely releasing its location indicated in phantom at the number 99, and the extended position illustrated in FIG. 4. The deployment movement of the support bar 50 is shown schematically by the arrow 98 in FIG. 6.

In one embodiment, the length of the planar primary insulating panel 29 is nine times the width of the primary corner structure 30, so that four support bars spaced apart by an interval of three times the width of the the primary corner structure 30 engages the plane primary insulating board 29 along its edge turned towards the edge, namely two support bars 50 at both ends of this edge, i.e. at two corners of the plane primary insulating panel 29, and two support bars in a central zone of the edge of the primary plane insulating panel 29. This central zone is shown in FIG. As partially shown in FIG. 3, the plane primary insulating panel 29 has the general shape of a rectangular parallelepiped with a longitudinal edge 26 parallel to the edge 10. The flat primary insulating panel 29 has, for example, a composite structure consisting of a layer of insulating polymer foam sandwiched between a rigid bottom plate, an exposed area 28 of which is apparent, and a rigid cover plate 25. The rigid cover plate 25 and the insulating polymeric foam layer are hollowed out with a groove 27 extending perpendicular to the edge 10 to the right of the plate 20 and opening on the longitudinal edge 26 to discover the uncovered area 28 of the rigid bottom plate.

 In the mounted state, the second portion 51 of the support bar 50 is engaged in the groove 27 and bears on the uncovered area 28 of the rigid bottom plate, possibly via a shim thick 48. Another shim 49 may be interposed between the other end of the support bar 50 and the secondary membrane (not shown). The shims 48 and 49 are dimensioned to ensure the parallelism between the support bar 50 and the bottom plate of the primary plane insulating panel 29. They are made of a sufficiently soft material to avoid the risk of punching, marking or For example, they may be made of plywood, plastic or epoxy resin.

 The support bar 50 mounted in this way has several advantages: the second portion 51 is a length cantilever substantially parallel to the flat wall of the vessel which bears on the primary insulating panel plane 29, preferably to distance from the edge of this panel. It thus makes it possible to retain the plane primary insulating panel 29 on the secondary membrane without requiring complex arrangements on the primary insulating panel plane 29: it suffices to disengage a flat portion of the bottom plate.

In addition, the length of the second portion 51 is easily adjustable by sliding the stud 45 in the length of the slot 58. This arrangement is therefore easily adapted to planar insulating panels having different dimensions or grooves 27 having different lengths. The length of the groove 27 can in particular be shortened following cutting of the edge 26 to reduce the width of the insulating panel 29. In addition, since the support bar 50 is anchored to a stud carried by the secondary angle structure 13, its position is not sensitive to the dimensioning of the secondary planar insulating panels (not shown) adjacent to the structure of the secondary structure. Secondary angle 13. This arrangement is therefore easily adapted to secondary insulating panels planes of different dimensions.

 As can be seen in FIG. 4, each bracket 32 has two projecting flanges 53 which protrude from the dihedral insulating block 31 at two ends of the bracket 32 opposite in the direction of the edge 10. Thus, the space 38 between the two dihedral insulating blocks 31 is partially covered by the two projecting flanges 53 on either side thereof.

 To preserve access to the anchoring member disposed in the space 38, at least each of the two projecting flanges 53 on either side of the anchoring member is provided with a cutout 54 which is located in line with the stud 45 and which is formed in the end edge 55 oriented transversely to the edge 10.

 Optionally, as sketched in FIG. 2, all the projecting edges 53 of all the angles 32 may have this cutout 54 to standardize the manufacturing.

 As best seen in Figure 5, the cutouts 54 serve to provide sufficient space between the two projecting flanges 53 for the passage of a clamping tool 60, for example a pipe wrench having a cylindrical head 61 or a screwdriver. The depth of the cutout 54 in the direction of the edge 10 can therefore be dimensioned to provide a distance D slightly greater than the diameter of the cylindrical head 61 between the bottoms of the two cutouts 54 vis-à-vis. The length of the cutout 54 along the end edge 55 may be substantially equal to the same distance D, for example about 30mm.

 The assembly sequence of the corner area of the tank will now be briefly described:

 - Mounting the secondary insulating barrier and the secondary waterproof membrane 15, including the cap nuts 42

placing the support bars 50 in the retracted position, the slot 58 of the support bar being positioned in line with the blind nut 42. - Inserting and screwing the stud 45 in the blind nut 42 through the slot 58 of the support bar 50, setting the nut 47 on the stud 45 in the untightened position

 - Establishment of the insulating joints 39 between the locations of the primary corner structures 30. Where the support bar 50 is present, the insulating joint 39 has at its base a pin inserted into the hollow section U-shaped the support bar 50. The insulating joint 39 also has a cylindrical well 56 in line with the blind nut 42 to receive the stud 45 and the nut 47.

 fixing the primary corner structures 30 on the secondary corner structures 13, on either side of the insulating joints 39.

laying flat primary insulating panels 29 adjacent to the row of primary corner structures

 Displacement of the support bars 50 in the deployed position, the insulating joint 39 remaining immobilized by the stud 45 engaged in the cylindrical well 56

 - Screwing the nut 47 on the stud 45 through the cutouts 54 of the brackets 32 and the cylindrical well 56 of the insulating joint 39, to achieve the tightening of the support bar 50

 Inserting a cylindrical plug 57 into the cylindrical well 56 to close it.

 - Installation of the primary waterproofing membrane.

 The construction of the planar portions of the vessel wall on both sides of an edge can be performed identically or differently, and symmetrically or asymmetrically. Furthermore, if a single angle of the tank has been described above, the other corners of the tank may have the same or different arrangement.

Referring to Figures 7 to 10, we will now describe the structure of the vessel wall at one end of the edge 10, that is to say at the intersection between three planar walls. The three walls which are here represented constitute respectively a bottom wall, an end wall and a lower oblique wall. The lower oblique wall forms an angle of 135 ° with the bottom wall. The lower oblique wall and the bottom wall are perpendicular to the end wall. Such For example, the arrangement corresponds to a tank having a generally polyhedral shape and having two octagonal end walls which are connected to one another by eight walls, namely a horizontal bottom wall and a ceiling wall. , two vertical side walls, two upper oblique walls each connecting one of the side walls to the ceiling wall and two lower oblique walls each connecting one of the side walls to the bottom wall.

 In this zone, as shown in FIG. 7, the row of secondary corner structures 13 ends in a last secondary angle structure 113 which is formed of a set of three insulating panels which are respectively fixed against the supporting structure of each of the three supporting walls. The three insulating panels of the last secondary corner structure 113 each have a sandwich structure identical to that of the secondary corner structures 13, namely consisting of a layer of insulating polymer foam 1 16 sandwiched between two rigid plates 117, 1 18 for example plywood.

 On each of the three insulating panels of the last secondary angle structure 1 13, the rigid plate 1 18 carries anchor plates 121 and 140 whose structures and functions are identical to those of the anchor plates 21 and 40 described above. In particular, the anchoring plates 121 make it possible to fix a final primary angle structure 130 (FIG.7) on the last secondary angle structure 1 13.

 The plate 40 makes it possible to fix an anchoring member in a space between the last primary corner structure 130 and a second-to-last primary corner structure 230 (FIG.7) of the row of primary corner structures. This anchoring member comprises a pin 145 engaged in a slot 158 of a support bar 150 visible in FIG. 9.

 Fig. 8 is also a view of the end region of the ridge, showing in addition the primary corner structures mounted on the secondary corner structures of Fig. 7. The secondary sealing membrane is entirely omitted for simplify the representation.

As shown, the last primary angle structure 130 of the row consists of three insulating blocks respectively resting against each of the three insulating panels of the last secondary angle structure 1 13. Moreover, the insulating blocks of the last primary corner structure 130 each have an inner face on which rests an angle bracket 132 whose general structure is similar to the metal angle 32 of the primary corner structure 30, except the presence of a third wing 100 parallel to the lower oblique wall. The angle bracket 132 comprises in particular studs 136, orifices 137 and flanges 153 whose structures and functions are similar to those of studs 36, orifices 37 and rims 53 described above.

 The penultimate primary corner structure 230 is shown by employing reference numerals increased by 200 for elements similar or identical to those of the primary corner structure 30. The dihedral insulating block 231 is longer than the insulating block dihedral 31 and carries on its inner surface two successive metal angles in the direction of the edge. The metal angle 232 is substantially identical to the metal angle 32 of the primary angle structure 30, but because the dihedral insulating block 231 is elongate toward the last primary corner structure 130, it may have a larger dimension. long along the edge 10 and it extends only one side (not shown) of the dihedral insulating block 231.

 The metal angle 65 is placed next to the metal angle 232 with a small gap between them and fixed on the dihedral insulating block 231 in the same manner as the metal angle 32 of the primary angle structure 30. The metal angle 65 presents a protruding flange 253 protruding from the dihedral insulating block 231 in the direction of the ridge 10 above the space 138. The space 138 is partially covered by the two projecting flanges 153 and 253 of the wall other of it.

 The protruding flange 153 and / or the protruding flange 253 may include a cutout to facilitate access to the anchor member in the space 138. Here, a cutout 254 is present only in the projecting flange 253.

Furthermore, the fixing of the penultimate primary angle structure 230 on the secondary insulating barrier is carried out only at the furthest portion of the last primary corner structure 130, namely the portion carrying the angle metal 232 which is fixed on a penultimate secondary structure of secondary angle 13 underlying in the same manner as described above For this, the metal angle 232 also has orifices 237. On the other hand, the metal angle 65 does not have orifices and can be continuous, since the portion of the dihedral insulating block 231 facing the last primary angle structure 130 spans the gap 66 between the penultimate structure of the secondary angle 13 and the last secondary angle structure 1 13 and extends on the last secondary angle structure 1 13 without being fixed thereto.

 This arrangement has the advantage of being independent of the precise size of the gap 66 in the secondary insulation barrier, which can be easily adjusted to compensate for manufacturing tolerances.

 In addition, to adjust the primary insulation barrier to the dimensional tolerances of manufacture of the supporting structure, it is possible to cut to size the penultimate primary angle structure 230, namely to cut the end of the dihedral insulating block. 231 and the end of the metal angle 65 turned towards the last primary angle structure 130. Given the absence of attachment of this end portion to the secondary insulation barrier, this cutting entails no complication . In this case the cut 254 is added after cutting the metal angle 65 to the desired length.

 FIG. 9 shows the same zone of the tank as FIG. 8, but with the addition of a final plane primary insulating panel 129 adjacent to the penultimate primary corner structure 230. This primary plane insulating panel 129 presents , similarly to the groove 27 of Figure 3, a recess 127 made in line with a corner area of the rigid bottom plate (not shown) to discover said corner area. Figure 9 also shows the support bar 150 which is engaged in the recess 127 and bears on the uncovered area as previously described.

 Referring to Figures 9 and 10, we will now describe the structure of the primary waterproofing membrane at the corners of the tank.

The primary waterproofing membrane is for example a membrane having two series of mutually perpendicular corrugations. It can be performed essentially as described in WO-A-2017006044. Metal sheets 67 of the primary edge-sealing membrane are welded along their edge directed towards the edge on the metal angles 32, 232, 65, 132. Furthermore, metal corner pieces 68, 168, 268 are welded astride each interface between two successive metal angles 32, 232, 65, 132.

 The corner pieces 68, 168, 268 cover the orifices 37, 137, 237 and the cutouts 54, 254 of the metal angles provide the continuity of the corrugations of the primary waterproofing membrane oriented perpendicularly to the edge 10.

 With reference to FIGS. 13 to 16, a second embodiment of the structure of the vessel wall at the end of the edge 10 will now be described. In this embodiment, the first-to-last angle structure 1230, shown in perspective in Figure 13, is modified to allow the second metal angle 1065 (Fig. 16) to be mounted from inside the vessel, subsequent to the installation of the penultimate primary angle structure 1230 .

 For this, on the side of the penultimate primary angle structure 1230 which is turned towards the last primary angle structure 130, the two faces of the dihedral insulating block 231 have a respective groove 83 which extends parallel to the 10 and which opens on the inner surface of the inner plate 235 and on the side of the inner plate 235 facing the last primary corner structure 130. The groove 83 has a width which increases along the direction of thickness from the inner surface, namely in the illustrated embodiment it comprises successively a narrower inlet portion and a wider bottom portion.

 An insert 84 shown in perspective in FIG. 14 is slidably housed in the groove 83. The insert 84 has a generally profiled shape with a wider base portion 85 intended to be housed in the bottom portion of the groove 83 and a a narrower head portion 86 for accommodating in the inlet portion of the groove 83. The head portion 86 has a tapped hole 87 on its upper surface for receiving a fastening screw 88 (Fig. 16). Preferably the insert 84 is slightly narrower than the groove 83 to allow a set of adjustment also in the direction transverse to the edge 10.

Figures 15 and 16 show the area of the vessel wall at the end of the ridge before the primary waterproofing membrane is mounted. FIG. 15 is a plan view from above with respect to the last plane primary insulating panel 129. It shows that the penultimate primary angle structure 1230 is mounted on the secondary insulating barrier without the second metal angle 1065 being be present. This thus frees access to the space 138 between the last primary corner structure 130 and the first to last primary corner structure 1230. This access from above makes it possible to easily adjust the position of the support bar 150 in the extended position to bear on the open area 128 of the bottom plate of the last planar primary insulating panel 129, as shown in Figure 15, and to lock it in position by clamping the nut 145.

 Then, unrepresented insulative fittings are placed in the space 138 and in the recess 127, to complete the primary insulating barrier, and then the second metal bracket 1065 is attached to the penultimate primary corner structure 1230 as shown. in FIG. 16. For this, a fixing screw 88 is engaged in a hole in each of the two sides of the second metal angle 1065 and screwed into the threaded hole 87 of the insert 84. Alternatively, a rivet could be used.

 The primary membrane can then be made as previously described.

 The metal angle 1065 which is fixed from the inside of the tank allows easy access to an anchoring member. This solution can be used with anchors made in different forms.

 Figure 11 illustrates another embodiment of the vessel wall along the edge 10. The primary and secondary sealing membranes are omitted to simplify the representation. Elements similar or identical to those of FIGS. 2 to 4 bear the same reference number increased by 300 and will only be described to the extent that they differ from those of FIGS. 2 to 4.

 In this embodiment, the primary angle structure 330 is fixed to the secondary angle structure 313 by means of pins 345 disposed in each space 338 between two dihedral insulation blocks 331. For this, the rigid plate 334 is slightly more wide than the polymeric foam layer 333 so as to discover two lateral flanges of the rigid plate 334.

A support bar 350 has a bore, which can be oblong, traversed by the stud 345 and bears on the lateral flanges of the rigid plate 334 of the two primary angle structure 330 between which the stud 345 is disposed. Thus, each primary corner structure 330 is retained by two support bars 350 in taken with the two lateral flanges of its rigid plate 334. A not shown nut is screwed onto each stud 345 to tighten the support bar 350 in the direction of the supporting structure. The cutouts 354 in the edges of the metal angles 332 facilitate the mounting of the stud 345 and the establishment of the nut in the manner previously described.

 Because of this mode of attachment of the primary angle structures 330, the orifices are removed in the metal angle 332, which can be continuous.

 For anchoring the plane primary insulation board 329 adjacent to the primary corner structure row 330 on the secondary barrier, a row of studs 69 may be provided on each side of the row of primary corner structures 330. This may require to provide a larger secondary angle structure 313, as shown.

 In a variant of Figure 1 1, not shown, the pins 69 are removed and the support bar 350 is made sliding as the support bar 50 of Figure 6, to be placed in a deployed position straddling the primary corner structure 330 and the plane primary insulating panel 329, so as to jointly ensure the anchoring of these two insulating elements. For this, the length of the support bar 350 can be increased and the geometry of the primary plane insulating panel 329 can be adapted to receive the support bar 350 in a groove or recess exposing the bottom plate.

 In one embodiment, the secondary insulating barrier and the secondary sealing membrane are removed and the studs which anchor the primary insulating barrier are carried directly by the carrier walls 11, 12.

 The technique described above for producing a sealed and thermally insulating tank for storing a fluid can be used in different types of tanks, for example to form an LNG tank in a land installation or in a floating structure such as a LNG tanker. Or other.

The technique illustrated above in the context of a truly polyhedral support surface, in which plane portions join at edges, is also applicable to an approximately polyhedral support surface which, instead of the ridges, would have rounded portions providing a connection between planar portions. The term edge area is used for designate the connection between two planar portions in the two contexts and may correspond to a real edge or a rounded portion between the two planar portions.

 Referring to Figure 12, a cutaway view of a LNG tank 70 shows a sealed and insulated tank 71 of generally prismatic shape mounted in the double hull 72 of the ship. The wall of the tank 71 comprises a primary sealed barrier intended to be in contact with the LNG contained in the tank, a secondary sealed barrier arranged between the primary waterproof barrier and the double hull 72 of the ship, and two insulating barriers arranged respectively between the primary watertight barrier and the secondary watertight barrier and between the secondary watertight barrier and the double hull 72.

 In a manner known per se, loading / unloading lines 73 arranged on the upper deck of the ship can be connected, by means of appropriate connectors, to a terminal! marine or port to transfer a cargo of LNG to or from the tank 71.

 FIG. 12 represents an example of a marine terminal comprising a loading and unloading station 75, an underwater pipe 76 and an onshore installation 77. The loading and unloading station 75 is a fixed off-shore installation comprising an arm mobile 74 and a tower 78 which supports the movable arm 74. The movable arm 74 carries a bundle of insulated flexible pipes 79 that can connect to the loading / unloading pipes 73. The movable arm 74 can be adapted to all gauges of LNG carriers . A connection pipe (not shown) extends inside the tower 78. The loading and unloading station 75 enables the loading and unloading of the LNG tank 70 from or to the shore facility 77. liquefied gas storage tanks 80 and connecting lines 81 connected by the underwater line 76 to the loading or unloading station 75. The underwater line 76 allows the transfer of the liquefied gas between the loading or unloading station 75 and the onshore installation 77 over a large distance, for example 5 km, which makes it possible to keep the tanker vessel 70 at great distance from the coast during the loading and unloading operations.

In order to generate the pressure necessary for the transfer of the liquefied gas, pumps on board the vessel 70 and / or pumps fitted with shore installation 77 and / or pumps equipping the loading and unloading station 75.

 Although the invention has been described in connection with several particular embodiments, it is obvious that it is not limited thereto and that it comprises all the technical equivalents of the means described and their combinations if they are within the scope of the invention.

 The use of the verb "to include", "to understand" or "to include" and its conjugated forms does not exclude the presence of other elements or steps other than those set out in a claim. The use of the indefinite article "a" or "an" for an element or a step does not exclude, unless otherwise stated, the presence of a plurality of such elements or steps.

 In the claims, any reference sign in parentheses can not be interpreted as a limitation of the claim.

Claims

1. Sealed and thermally insulating vessel for storing a fluid, the sealed and thermally insulating vessel having an insulation barrier and a sealing barrier disposed on an inner surface of the insulation barrier, the insulation barrier being disposed on a support surface carrying anchoring members and retained on the support surface by said anchoring members,
in which the insulation barrier comprises insulating elements arranged in several parallel rows,
wherein said anchoring member comprises a support member (50, 150) mounted on the support surface between two insulating members (30, 130, 230, 1230) of a first of said parallel rows and movable relative to the support surface transversely to said first row between:
a retracted position in which the support element (50, 150) is housed entirely between the two insulating elements (30, 130, 230, 1230) so as to leave the location (99) of a second of said rows free parallel, the second row being adjacent to the first row, and
an extended position in which the support member projects over the location of the second row and engages at least one insulating member (129) of the second row to retain said insulating member (29, 129) of the second row row on the support surface.
 The vessel according to claim 1, wherein the anchoring member further comprises a stud (45, 145) attached to the support surface and projecting inwardly in a space between the two insulating members (30, 130, 230, 1230) of the first row, and
a nut (47) screwed onto the stud and adapted to clamp the support member (50, 150) in the direction of the support surface to lock the position of the support member.
3. A vessel according to claim 2, wherein the support element comprises a support bar (50, 150) having a slot (58, 158) through which the stud (45, 145) passes, so that when the nut does not clamp the support bar, the support bar can be slid in a direction transverse to the first row between: the retracted position in which the support bar (50, 150) is housed entirely between the two insulating elements (30, 130, 230, 1230), and
the deployed position or positions in which a portion (51) of the support bar protrudes beyond the first row to engage said at least one insulating member (29, 129) of the second row.
 A vessel according to any one of claims 1 to 3, wherein the insulating element of the second row is a planar insulating board (29, 129) which has a layer of insulating polymeric foam sandwiched between a bottom plate. rigid and a rigid cover plate (25), the rigid cover plate and the insulating polymeric foam layer having a recess (127) formed in the thickness of the insulating panel to reveal a bearing area (28) on the surface internal of the rigid bottom plate, said recess opening on an edge (26) of the insulating panel plane parallel to the first row and facing the first row, the anchoring member being engaged with said bearing zone (28). ) of the bottom plate.
 5. Tank according to claim 4, wherein the planar insulating panel has a rectangular parallelepiped shape, the recess (127) being formed in a corner of the plane insulating panel.
 Tank according to any one of claims 1 to 5, wherein the support surface carries a plurality of anchoring members (45, 145) distributed along the first row of insulating elements and comprising elements of support (50, 150) mounted on the support surface between the insulating elements (30, 130, 230, 1230) of the first row and movable relative to the support surface between the retracted position and the deployed position,
said bearing members engaging respective areas of said second row insulative member (29, 129) for retaining said insulating member on the support surface.
 A vessel according to any one of claims 1 to 6, wherein the support surface has at least two planar regions forming an angle therebetween and joining at an edge region (10),
wherein the first row of insulators comprises a row of corner structures (30, 130, 230, 1230) disposed along said edge region of the support surface and the second row of insulators comprises a row planar insulating panels (29, 129) disposed on a said planar region of the support surface.
 The vessel of claim 7, wherein a said angle structure (30, 130, 230, 1230) comprises:
a dihedral insulating block (31, 131, 231) having two flats parallel to the two planar regions and forming an angle therebetween, said flange having a flat outer surface bearing against a corresponding flat region of the support surface and a planar interior surface parallel to said corresponding planar region and spaced from said planar outer surface in a thickness direction, and a metal bracket (32, 232, 65, 1065, 132) attached to the planar interior surfaces of the dihedral insulating block to form said barrier wall; sealing at the edge area of the support surface.
 Tank according to Claim 8, in which the metal angle has a protruding portion (53, 153, 253) projecting from the dihedral insulating block in the direction of the edge zone.
wherein two successive corner structures in said row are arranged to have a spacing (38, 138) in the direction of the edge area between the dihedral insulating blocks, said spacing being at least partially covered by the projecting portion (53, 153, 253) of the metal angle of one of the two successive angle structures,
wherein said support member of the anchor member (45, 145) is mounted on the support surface between the dihedral insulating blocks (31, 131, 231) of the two corner structures.
 Tank according to claim 9, in which a block of insulating material (39) is arranged in the spacing (38, 138) between the dihedral insulating blocks between the projecting portion (53, 153, 253) of the metal bracket and the support element.
1. A vessel according to claim 9 or 10, wherein a said metal angle (1065) whose protruding portion (253) covers said spacing comprises a bore on its inner surface to receive a fastener (88) intended to cooperate with the dihedral insulating block (1230) for fixing said metal angle on the dihedral insulating block of the angle structure, the fastener being adapted to be engaged in the bore from the inner surface of the metal bracket (1065).
 12. A tank according to claim 11, wherein the fastener (88) comprises a screw or a rivet whose head is turned towards the inside of the tank and whose body passes through the bore of the metal angle to cooperate with the dihedral insulation block.
 The vessel according to claim 12, wherein the dihedral insulating block carries an insert (84) mounted on the planar inner surface of at least one pan for receiving and stopping said body of the fastener in the thickness direction. said at least one pan.
 The vessel of claim 13, wherein the insert (84) is mounted on said planar inner surface with clearance in a direction parallel to the planar inner surface.
 15. The tank according to claim 14, wherein said at least one part of the dihedral insulating block has a groove (83) extending parallel to the edge region (10) and opening onto said plane inner surface, the insert ( 84) being slidably housed in said groove.
 The vessel of claim 15, wherein said groove (83) has a width which decreases along the thickness direction toward the planar inner surface, so as to lock said insert (84) in the thickness direction.
A vessel according to any one of claims 8 to 16, wherein the support surface comprises a third planar region transverse to the ridge area at one end of the ridge zone (10), wherein a last structure angle (130) of the row of corner structures comprises, in addition to said dihedral insulating block, a third panel (100) parallel to the third plane region and forming angles with said two panels of the dihedral insulating block (130), and wherein said dihedral insulating block (231) of the first-to-last angle structure (230) of the row of corner structures has a larger dimension in the direction of the edge area than structures of angle located along a central portion of the ridge zone, the metal angle of said penultimate corner structure being composed of two corner segments (232, 1065) juxtaposed in the direction of the ridge zone and fixed on the interior surfaces ures planes of the block dihedral insulation (231),
wherein a first angle segment (232) of said penultimate corner structure is attached to said dihedral insulating block (231) by means of a fastener located on the outer surface of the first corner segment and inaccessible from the inner surface of the first corner segment,
and a second angle segment (1065) of said penultimate corner structure located on the edge region end side has said bore on its inner surface for receiving said fastener for cooperating with the block dihedral insulator (231) for fixing said second angle segment (1065) on the dihedral insulating block of the corner structure, the fastener being adapted to be engaged in the bore from the inner surface of the second corner segment ( 1065).
 The vessel according to claim 17, wherein the first angle segment (232) of said penultimate corner structure has holes (237) for the passage of anchoring members for securing said dihedral insulating block ( 231) on the support surface and the second angle segment (1065) of said second-to-last angle structure located on the end side of the edge region has a continuous surface outside the or each receiving bore. the or each fastener.
 A vessel according to any one of claims 1 to 18, wherein said insulation barrier is a primary insulation barrier and said sealing barrier is a primary sealing barrier, the vessel further comprising a barrier of insulation. secondary insulation (13, 13, 213) having a substantially polyhedral inner surface covered with a secondary sealing barrier (15) and forming said support surface.
 20. Ship (70) for the transport of a fluid, the vessel having a double hull (72) and a tank (71) according to any one of claims 1 to 19 disposed in the double hull.
21. Transfer system for a fluid, the system comprising a ship (70) according to claim 20, insulated pipes (73, 79, 76, 81) arranged to connect the vessel (71) installed in the hull of the ship to a a floating or land storage facility (77) and a pump for driving fluid through the insulated pipelines from or to the floating or land storage facility to or from the vessel vessel.
A method of loading or unloading a vessel (70) according to claim 20, wherein a fluid is conveyed through isolated ducts (73, 79, 76, 81) to or from a floating or land storage facility ( 77) to or from the vessel vessel (71).
 23. Manufacturing method for manufacturing a sealed and thermally insulating tank according to one of claims 1 to 19, the method comprising:
provide a support surface,
mounting an anchoring member on the support surface, said anchoring member having a support member (50, 150) movably mounted relative to the support surface,
mounting the first row of insulating elements (30, 130, 230, 1230) on the support surface, so that the support element (50, 150) is housed entirely between two insulating elements of the first row of insulating elements and that said support element is mounted movably transverse to said first row,
disposing a second row of insulating members (29, 129) on the support surface, the second row being parallel and adjacent to the first row, moving the support member (50, 150) to a deployed position in wherein the support member projects over the second row location (99) and engages at least one second row insulating member (29, 129) to retain said second row insulating member on the surface of support, and lock the support member in the deployed position.
PCT/FR2018/052669 2017-11-06 2018-10-26 Sealed and thermally insulating tank WO2019086788A1 (en)

Priority Applications (2)

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FR1760382 2017-11-06
FR1760382A FR3073271B1 (en) 2017-11-06 2017-11-06 Sealed and thermally insulated tank

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CN201880084667.0A CN111587341A (en) 2017-11-06 2018-10-26 Sealed and thermally insulated container
KR1020207016292A KR20200085826A (en) 2017-11-06 2018-10-26 Sealed and insulated tank

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WO2019086788A1 true WO2019086788A1 (en) 2019-05-09

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CN (1) CN111587341A (en)
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013093262A1 (en) * 2011-12-21 2013-06-27 Gaztransport Et Technigaz Fluidtight and insulating tank equipped with a retention device
WO2014167214A2 (en) 2013-04-12 2014-10-16 Gaztransport Et Technigaz Corner structure of a sealed and thermally insulating tank for storing a fluid
WO2016046487A1 (en) 2014-09-26 2016-03-31 Gaztransport Et Technigaz Sealed and insulating vessel comprising a bridging element between the panels of the secondary insulation barrier
WO2017006044A1 (en) 2015-07-06 2017-01-12 Gaztransport Et Technigaz Sealed and thermally insulated tank having a secondary sealing membrane equipped with a corner arrangement with corrugated metal sheets
FR3042253A1 (en) * 2015-10-13 2017-04-14 Gaztransport Et Technigaz Sealed and thermally insulated tank

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013093262A1 (en) * 2011-12-21 2013-06-27 Gaztransport Et Technigaz Fluidtight and insulating tank equipped with a retention device
WO2014167214A2 (en) 2013-04-12 2014-10-16 Gaztransport Et Technigaz Corner structure of a sealed and thermally insulating tank for storing a fluid
WO2016046487A1 (en) 2014-09-26 2016-03-31 Gaztransport Et Technigaz Sealed and insulating vessel comprising a bridging element between the panels of the secondary insulation barrier
WO2017006044A1 (en) 2015-07-06 2017-01-12 Gaztransport Et Technigaz Sealed and thermally insulated tank having a secondary sealing membrane equipped with a corner arrangement with corrugated metal sheets
FR3042253A1 (en) * 2015-10-13 2017-04-14 Gaztransport Et Technigaz Sealed and thermally insulated tank

Also Published As

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KR20200085826A (en) 2020-07-15
FR3073271A1 (en) 2019-05-10
CN111587341A (en) 2020-08-25
FR3073271B1 (en) 2019-11-01

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