EP2583021B1 - Sealed and insulating vessel comprising a support foot - Google Patents
Sealed and insulating vessel comprising a support foot Download PDFInfo
- Publication number
- EP2583021B1 EP2583021B1 EP11727255.9A EP11727255A EP2583021B1 EP 2583021 B1 EP2583021 B1 EP 2583021B1 EP 11727255 A EP11727255 A EP 11727255A EP 2583021 B1 EP2583021 B1 EP 2583021B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- corrugations
- pedestal
- series
- window
- 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.)
- Active
Links
- 230000004888 barrier function Effects 0.000 claims description 96
- 238000007789 sealing Methods 0.000 claims description 65
- 238000009413 insulation Methods 0.000 claims description 28
- 229910052751 metal Inorganic materials 0.000 claims description 25
- 239000002184 metal Substances 0.000 claims description 25
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 3
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims 22
- 238000007599 discharging Methods 0.000 claims 1
- 239000012528 membrane Substances 0.000 description 10
- 238000004078 waterproofing Methods 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 5
- 239000011152 fibreglass Substances 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000003949 liquefied natural gas Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 239000011491 glass wool Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C3/00—Vessels not under pressure
- F17C3/02—Vessels not under pressure with provision for thermal insulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C3/00—Vessels not under pressure
- F17C3/02—Vessels not under pressure with provision for thermal insulation
- F17C3/025—Bulk storage in barges or on ships
- F17C3/027—Wallpanels for so-called membrane tanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
- B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
- B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
- B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
- B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/004—Details of vessels or of the filling or discharging of vessels for large storage vessels not under pressure
-
- 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
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/01—Mounting arrangements
- F17C2205/0153—Details of mounting arrangements
- F17C2205/018—Supporting feet
-
- 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
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/01—Propulsion of the fluid
- F17C2227/0128—Propulsion of the fluid with pumps or compressors
- F17C2227/0135—Pumps
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2270/00—Applications
- F17C2270/01—Applications for fluid transport or storage
- F17C2270/0102—Applications for fluid transport or storage on or in the water
- F17C2270/0105—Ships
- F17C2270/0107—Wall panels
Definitions
- the invention relates to the field of the construction of a sealed and insulating tank disposed in a supporting structure, in particular to the construction of a wall of such a vessel to accommodate a support foot.
- LNG liquefied natural gas
- FR 272 46 23 describes an example of a tank.
- a corrugated metal sheet layer is used to provide a watertight barrier which also has sufficient elasticity to withstand forces resulting for example from hydrostatic pressure, dynamic pressure in case of movement of the cargo, and / or temperature variations.
- a sealed barrier and the underlying thermal insulation material are relatively fragile and can not necessarily support heavy equipment to be immersed at the bottom of the tank, for example a pump.
- the invention provides a sealed and insulating vessel disposed in a supporting structure, the vessel having a vessel wall, in particular a bottom wall of the vessel, arranged along the carrying structure, the vessel wall comprising : a sealing barrier, a thermal insulation barrier disposed between the sealing barrier and the supporting structure and having a support surface for the sealing barrier, and a support foot for equipment immersed in the sealed tank, the sealing barrier having a corrugated metal sheet layer having at least one series of parallel corrugations, the corrugated metal sheet layer being interrupted at a window surrounding the support leg, the support foot extending longitudinally through the window of the corrugated metal sheet layer and having a first end portion bearing against the supporting structure, for example against a bottom zone of the supporting structure, and a second portion end protruding into the tank to support the equipment to distance from the sheet metal layer, the sealing barrier having connecting pieces disposed in the window around the support foot for sealingly connecting the support foot to a marginal portion of the corrugated metal sheet layer defining the window, wherein the window interrupt
- such a tank may have one or more of the following characteristics.
- the support foot can have various forms, including the characteristics of the equipment to support.
- the support foot has at least one convex lateral side, and the guideline of said two corrugations between which the support foot is centered intersects the convex lateral side of the support foot.
- the support foot has a circular section.
- the window interrupts the guidelines of an even number of parallel corrugations of said at least one series, for example two parallel corrugations of said at least one series.
- the support foot is centered substantially in the middle of the guidelines of the two undulations.
- the support foot may be offset from the middle, so as to be closer to a corrugation than the other, for example if such a positioning makes it possible to reduce the interruption length of the corrugations taking into account the shape of the support foot.
- said at least one series of parallel corrugations is distributed equidistantly.
- the series of corrugations may have, at least locally, a less regular distribution.
- the corrugations are projecting on the side of an internal face of the sealing barrier intended to be in contact with a fluid.
- the connecting pieces comprise a plurality of end pieces disposed at a distance from the support foot so as to close interrupted ends of the two corrugations between the guidelines of which the support leg is centered. By such end pieces, one can close all the corrugations whose window interrupts the guidelines, so as to restore the continuity of the sealed barrier.
- the support foot comprises a hollow shell of generally tubular shape whose longitudinal axis is substantially perpendicular to the tank wall and a transverse closure wall sealingly closing the envelope to achieve the continuity of the sealing barrier at the support foot.
- a hollow form may in particular be preferred to limit the effective cross section of the support foot capable of creating a thermal bridge.
- the connecting pieces for sealingly connecting the support foot to a marginal portion of the corrugated metal sheet layer may have many shapes.
- the connecting pieces comprise an annular plate connected to a peripheral wall of the support foot at the level of the corrugated metal sheet layer.
- a tray can be pre-assembled to the support foot.
- the connecting pieces comprise an intermediate plate having a first edge welded to the annular plate and a second edge welded to the marginal portion of the corrugated metal sheet layer delimiting the window.
- the thermal insulation barrier comprises a primary thermal insulation barrier disposed on the side of the sealing barrier, said primary sealing barrier, and a secondary thermal insulation barrier disposed on the side of the the carrier structure, the vessel wall having a secondary sealing barrier disposed between the primary and secondary thermal insulation barriers, the secondary sealing barrier being sealingly connected to a peripheral wall of the support foot.
- the corrugated metal sheet layer has a first series of parallel corrugations and a second series of parallel corrugations which is secant to the first series of parallel corrugations at crossings, the window interrupting the lines. of a first plurality of parallel corrugations of the first series and / or the guidelines of a second plurality of parallel corrugations of the second series, the support leg being centered at a position between the guidelines of two parallel corrugations of the first plurality and / or between the guidelines of two parallel corrugations of the second plurality.
- the first series of parallel corrugations is perpendicular to the second series of parallel corrugations.
- the elasticity of the waterproof membrane can be well balanced in different directions.
- the aforementioned window may have different shapes, in particular depending on the shape of the support foot and / or the shape of the constituent elements of the corrugated metal sheet layer.
- the window is a quadrilateral, for example rectangle or square or parallelogram, having two sides parallel to the first series of corrugations and two sides parallel to the second series of corrugations.
- the support foot is disposed at the base of an unloading mast of the tank, for example to support a pump.
- An idea underlying the invention is to support equipment to be immersed in a tank on a foot bearing directly or indirectly on the support structure, to avoid or limit a force exerted on a relatively fragile corrugated waterproofing membrane.
- Another idea underlying the invention is to have such a support foot in a way that does not jeopardize the essential mechanical properties of the corrugated waterproofing membrane, including its sealing and resistance to thermal contraction or pressure efforts.
- Certain aspects of the invention are based on the idea of interrupting undulations of a corrugated waterproofing membrane at a passage area of a support foot, and positioning this support foot at a location which to limit the length of these interruptions, in order to limit the loss elasticity of the membrane that may result from such interruptions.
- Other aspects of the invention start from the idea of locally displacing undulations in order to bypass the zone of passage of the support foot without interrupting these undulations.
- a sealed and thermally insulating tank 1 consisting of tank walls 2 and 3 attached to the inner surface of corresponding walls 4 and 5 of a carrier structure.
- the supporting structure is for example the inner hull of a double hull ship or a construction on land.
- the walls of the tank comprise at least one sealing barrier 6 and minus a thermal insulation barrier 7.
- a secondary sealing barrier not shown, between the supporting structure and the sealing barrier 6, which is said to be primary in this case.
- the tank 1 can be made according to various well-known geometries, for example a prismatic geometry in the hull of a ship or a cylindrical geometry on land or other. Moreover, many methods are available to achieve the thermal insulation and sealing barriers, for example from prefabricated elements.
- an elongate rigid member constituting a support leg 10, which extends through the thermal insulation barrier 7 and the sealing barrier 6, so that one end bears against the bottom wall 5 of the supporting structure and that the other end protrudes into the tank away from the sealing barrier 6.
- the support leg 10 can for example be used to support a device 9 in front of be immersed in the tank.
- a device 9 in front of be immersed in the tank.
- it can be disposed at the base of a pumping mast of the tank, not shown.
- the support foot is here shown on a bottom wall of the vessel, a similar rigid element can be arranged in the same way at other locations in the vessel, for example as a support or spacing element for maintaining any object remote from the tank wall.
- sealing barrier 6 it is possible to use sheets of thin metal sheet having corrugations which form elastic zones to absorb the thermal contraction and the static and dynamic pressure forces.
- Such sealing barriers in corrugated or embossed sheet have been described in particular in FR-A-1379651 , FR-A-1376525 , FR-A-2781557 and FR-A-2861060 . This possibility will now be developed with reference to figures 2 and 3 .
- the sealing barrier 6 consists of a plurality of corrugated waterproof plates 11 whose inner face is intended to be in contact with the fluid.
- the sealed plates 11 are thin elements of metal such as stainless steel sheet or aluminum and are welded together at marginal overlap zones 12.
- the welds are of the overlap weld type whose method is described in detail for example in the patent FR-A-1387955 .
- the sealing plates 11 may be designed in various ways as to their shapes and dimensions, so that the weld areas may be variously positioned.
- the sealed plates 11 comprise, on their internal face, a first series of so-called longitudinal waves 15 and a second series of so-called transverse corrugations 16 whose respective directions are perpendicular.
- the first series of corrugations 15 has a height less than the second series of corrugations 16.
- the corrugations 15 are discontinuous at their crossings 18 with the corrugations 16 which are continuous.
- the longitudinal and transverse corrugations 16 project inwardly from the vessel 1.
- the support foot 10 has here a circular section of revolution, with a frustoconical lower portion 13 which connects at its smaller diameter end 17 to a cylindrical upper portion 14.
- the larger diameter base of the portion frustoconical 13 is in abutment against the wall 5 of the carrier structure.
- the frustoconical portion 13 extends through the thickness of the vessel wall beyond the level of the sealing barrier 6.
- the cylindrical portion 14 is sealingly closed by a circular plate 19, which may be for example welded to a not shown inner rim of the cylindrical portion 14.
- the corrugated waterproof plates 11 forming the sealing barrier 6 are cut so as to define a square window 25 around the support foot 10.
- a tight connection of connecting pieces is made between the support leg 10 and the sealing plates 11.
- the diameter of the support leg 10 is greater than the spacing between the corrugations of the first series 15 , some of the longitudinal corrugations indicated at 20 and whose guideline A intersects the support foot 10 have been interrupted at the window 25.
- the diameter of the support leg 10 is greater than the spacing between the of the second series 16
- some of the transverse corrugations indicated in FIG. 21 and whose guide line B intersects the support foot 10 have been interrupted ues at the window surrounding the support leg.
- the size of the window 25 is in practice greater than the diameter of the support leg 10, so that the introduction of the connecting pieces is relatively easy.
- the window 25 formed in the corrugated sheet layer could similarly interrupt corrugations whose guideline, without actually cutting the support foot, would be too close a close proximity of the support foot to allow the establishment connecting pieces between them and the support foot.
- the center C of the support foot 10 is positioned between the guidelines at interrupted corrugations 20 and between the guidelines B of the interrupted corrugations 21, and more precisely in the middle of these guidelines on the figure 3 . It results from this positioning the guideline A or B each time cutting the support foot 10 along a rope shorter than the diameter of the support foot 10. Therefore, and given the space to exist between the edge of the window 25 and the support foot 10 to allow the establishment of the connecting pieces, this positioning of the support foot makes it possible to interrupt each of the undulations 20 and 21 for a shorter distance than in the case where the guideline A or B would cut the support foot according to its largest transverse dimension, that is to say its diameter in the case of a circular section. It is advantageous to interrupt the corrugations of the sealing barrier for as short a distance as possible, since these interruptions are capable of locally reducing the flexibility of the sealing barrier and thus of promoting locally its fatigue and wear. .
- the centering of the support foot halfway between the interrupted undulations 20 and halfway between the undulating corrugations 21 provides an optimal result.
- Other forms of section and other foot positions may also be considered.
- One principle that can be used to adapt each time the positioning of the support foot between the corrugations is to choose a position that minimizes, or at least decreases, the transverse dimension of the support foot that intersects the guideline of the interrupted undulation.
- an appropriate optimization parameter to adapt the positioning of the support foot may be the length of the longest interruption or cumulative length of interruptions obtained.
- the window 25 has a square shape which facilitates the cutting of the sealed plates 11 to the desired shape.
- other forms of windows can also be implemented, depending in particular on the geometry of the support foot.
- the figure 4 is a half-sectional view of the support foot 10 and a substantially square area of the vessel wall around it at an intermediate stage of mounting.
- the right side is shown before the installation of the elements of the waterproofing barrier secondary and primary insulation barrier, the left side after the establishment of these elements.
- the support foot 10 comprises a secondary plateau 23 of square shape fixed around the frustoconical portion 13 at a height corresponding to the upper surface of the secondary thermal insulation barrier 22 and the secondary watertight barrier which is very thin.
- the support foot 10 comprises a round-shaped primary plate 24 fixed around the frustoconical portion 13 at a height corresponding to the upper surface of the primary thermal insulation barrier 26.
- the trays 23 and 24 can be made in one piece with the support foot 10.
- the secondary insulation barrier 22 comprises a glass wool pad 27 which also has a square outer contour.
- the primary insulation barrier 26 comprises a glass wool pad 28 which also has a circular outer contour.
- a panel 30 generally has a shape of L-shaped steps with an L-shaped lower insulating block 31 constituting a member of the secondary insulating barrier 22, a flexible impervious liner 32 completely covering the upper surface thereof. L-shape of the block 31, and an L-shaped smaller insulator block 33 of smaller size constituting an element of the primary insulation barrier 26.
- the upper block 33 is aligned with the outer sides of the lower block 31, so as to revealing an area of the waterproof coating 32 located on an inner rim and on end edges of the lower block 31.
- the panel 30 may be prefabricated by bonding with materials similar to those taught in the application FR-A-2781557 , including polyurethane foam and plywood for insulation barriers and a composite material made of aluminum foil and fiberglass for the secondary waterproofing barrier.
- the four corner panels 30 border the inside of the contour of the stuffing 27 and the plate 23.
- the dimensions of the blocks 31 are designed to provide spaces between them in the form of four radial funnels 34 located each time between the faces. end of two adjacent lower blocks 31.
- each of the chimneys 34 is filled with a sheet of fiberglass 35.
- the porosity of the fiberglass of the sheets 35 and the stuffing 27 makes possible the gas circulation through the primary insulation barrier 22, in particular for inerting the nitrogen vessel wall.
- the figure 6 represents the realization of the secondary sealing barrier in the area of the support foot 10 in plan view.
- four strips 36 of the sealed composite material of aluminum foil and fiberglass are bonded to the secondary plate 27 and the waterproof coating 32 of the panels 30.
- a strip 36 is positioned each time to overlap one side of the secondary plate 27 and the inner edges of two lower blocks 31.
- the strips 36 overlap at end regions 37.
- four strips 38 of the sealed composite material of aluminum foil and fiberglass are adhered to the waterproof coating 32 of the panels 30, each time so as to overlap the flanges of end of two lower blocks 31.
- the figure 7 represents the same area of the tank wall after placement of the primary insulation barrier. This is completed between the upper insulating blocks 33 and the support leg 10 by means of four corner blocks 40 and four medial blocks 41, the inner side of which in each case follows the rounded contour of the primary plate 24 and the 28. These blocks 40 and 41 are also shown on the left side of the figure 4 .
- the upper surface of the medial blocks 41 has in each case a rabbet 44 delimited by a recess 43.
- the rabbets 44 are precisely at the level of the primary plate 24 to provide a flat support surface for metal closure plates 45 intended to provide the primary sealing barrier around support foot 10.
- two closure plates 45 are arranged around the primary plate 24 and sealingly welded thereto over its entire periphery.
- the plates 45 are cut in a semicircle at their inner edge 46, while their outer edge 47 defines a square of dimension slightly greater than the window 25 formed in the corrugated waterproof plates 11.
- the two closure plates 45 are superimposed at the level of areas 48 where they are welded together.
- the closure plates 45 are fixed to the blocks 40 and 41 of the primary insulation barrier by means of wood screws or rivets 49 disposed near their outer edge 47 to firmly press the closure plates 45 against these blocks, in particular because it is necessary to prevent them from being raised while being welded on the primary plate 24.
- the end piece 50 comprises a two-part sole 51 and 52 intended to be welded sealingly respectively on the closure plate 45 and on the sealing plate 11, and a shell 54 intended to be sealed at the end of the corrugation 20 or 21.
- a recess 53 between the parts 51 and 52 of the soleplate has an amplitude substantially equal to the thickness of the sealed plate 11.
- the cutting of the insulating blocks and other prefabricated elements represented on the figures 2 , 4 , 6 and 7 to form the secondary insulation barrier, the secondary sealing barrier and the primary insulation barrier is purely illustrative. Similar elements can be cut and prefabricated in other forms so that the mounting of the vessel wall involves a higher or lower number of elementary parts.
- the four L-shaped corner panels 30 are replaced by two U-shaped panels or a single panel in the form of a square frame.
- the support foot considered above requires a window size approximately equal to twice the spacing 55 between two corrugations 15 or 16, which are here equidistant. For this, two waves of each series were interrupted.
- this arrangement of the support foot and the vessel wall in its vicinity may be adapted to other dimensions of the support foot.
- the corresponding window may interrupt a larger number of corrugations in one or each series, for example three or four or more corrugations.
- the sealing barrier 106 is modified at two concentric square windows 125 and 160. Outside the window 160, the sealing barrier 106 consists of sealed plates 111 carrying longitudinal corrugations 115 and transverse 116 distributed equidistantly. Between the window 160 and the window 125, the sealing barrier 106 is continued with other corrugated sealing plates, that is to say two generally C-shaped plates 161 in the present case, which carry distributed corrugations. differently, that is to say less spaced in the present case.
- the corrugations of the plates 161 constitute in particular a central segment 162, respectively 163, offset at a distance from the support leg 110, for each of the corrugations 158, respectively 159.
- the structure of the sealing barrier 106 at the level of the window 125 and inside of it is similar to the embodiment of the figure 3 .
- deviation parts 170 are used.
- the deflection piece 170 comprises a two-part flange 171 and 172 intended to be welded in a sealed manner respectively on a plate 111 or 161 of the sealing barrier 106 and on an adjacent deviating part 170, and a bent corrugation 174 whose the guideline forms a chosen angle, for example 135 °.
- the bent corrugation 174 is intended to be sealingly connected to the adjacent end of the corrugation 158 or 159 and to the bent undulation of the adjacent deviation piece.
- a recess 173 between the parts 171 and 172 of the soleplate has an amplitude substantially equal to the thickness of the sheet used to make the sealing plates 111 or 161 or the deflecting parts 170.
- a sheet of the same thickness is used for these different pieces.
- all the corrugations whose window interrupts the guideline for example two corrugations of each series as on the figure 3 , are extended through the window in a staggered path, similar to the undulations 158 and 159 of the figure 9 .
- the flexibility of the membrane can be improved since no ripple is finally interrupted by a tip piece at the support leg.
- the primary sealing barrier is made of sheet metal having two sets of mutually perpendicular corrugations.
- other types of corrugated metal membranes with less or more corrugations and / or a different arrangement of the corrugations can be similarly employed.
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- Engineering & Computer Science (AREA)
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- Chemical & Material Sciences (AREA)
- Ocean & Marine Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
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Description
L'invention se rapporte au domaine de la construction d'une cuve étanche et isolante disposée dans une structure porteuse, en particulier à la construction d'une paroi d'une telle cuve devant accueillir un pied de support.The invention relates to the field of the construction of a sealed and insulating tank disposed in a supporting structure, in particular to the construction of a wall of such a vessel to accommodate a support foot.
Des cuves étanches et thermiquement isolantes peuvent être utilisées dans différentes industries pour stocker des produits chauds ou froids. Par exemple, dans le domaine de l'énergie, le gaz naturel liquéfié (GNL) est un liquide qui peut être stocké à pression atmosphérique à environ -163°C dans des cuves de stockage terrestres ou dans des cuves embarquées dans des structures flottantes. De telles structures flottantes sont en particulier les navires méthaniers pour le transport du produit et les installations off-shore, connues notamment sous les acronymes FPSO et FSRU, pour le stockage, la liquéfaction ou la regazéification du produit.
Dans les réservoirs à membrane, une couche de tôle métallique ondulée est utilisée pour réaliser une barrière étanche qui présente aussi une élasticité suffisante pour résister à des efforts résultant par exemple de la pression hydrostatique, de la pression dynamique en cas de mouvement de la cargaison, et/ou des variations de température. Toutefois, une telle barrière étanche et le matériau d'isolation thermique sous-jacent sont relativement fragiles et ne peuvent pas nécessairement supporter des équipements lourds devant être immergés au fond de la cuve, par exemple une pompe.In diaphragm tanks, a corrugated metal sheet layer is used to provide a watertight barrier which also has sufficient elasticity to withstand forces resulting for example from hydrostatic pressure, dynamic pressure in case of movement of the cargo, and / or temperature variations. However, such a sealed barrier and the underlying thermal insulation material are relatively fragile and can not necessarily support heavy equipment to be immersed at the bottom of the tank, for example a pump.
Selon un mode de réalisation, l'invention fournit une cuve étanche et isolante disposée dans une structure porteuse, la cuve comportant une paroi de cuve, notamment une paroi de fond de cuve, disposée le long de la structure porteuse, la paroi de cuve comportant : une barrière d'étanchéité,
une barrière d'isolation thermique disposée entre la barrière d'étanchéité et la structure porteuse et présentant une surface de support pour la barrière d'étanchéité, et
un pied de support pour un équipement immergé dans la cuve étanche,
la barrière d'étanchéité comportant une couche de tôle métallique ondulée présentant au moins une série d'ondulations parallèles, la couche de tôle métallique ondulée étant interrompue au niveau d'une fenêtre entourant le pied de support,
le pied de support s'étendant longitudinalement à travers la fenêtre de la couche de tôle métallique ondulée et présentant une première portion d'extrémité en appui contre la structure porteuse, par exemple contre une zone de fond de la structure porteuse, et une deuxième portion d'extrémité faisant saillie dans la cuve pour supporter l'équipement à distance de la couche de tôle métallique,
la barrière d'étanchéité comportant des pièces de liaison disposées dans la fenêtre autour du pied de support pour relier de manière étanche le pied de support à une portion marginale de la couche de tôle métallique ondulée délimitant la fenêtre,
dans laquelle la fenêtre interrompt les lignes directrices d'une pluralité des ondulations parallèles de ladite au moins une série et le pied de support est centré à une position située entre les lignes directrices de deux ondulations parallèles de ladite pluralité.According to one embodiment, the invention provides a sealed and insulating vessel disposed in a supporting structure, the vessel having a vessel wall, in particular a bottom wall of the vessel, arranged along the carrying structure, the vessel wall comprising : a sealing barrier,
a thermal insulation barrier disposed between the sealing barrier and the supporting structure and having a support surface for the sealing barrier, and
a support foot for equipment immersed in the sealed tank,
the sealing barrier having a corrugated metal sheet layer having at least one series of parallel corrugations, the corrugated metal sheet layer being interrupted at a window surrounding the support leg,
the support foot extending longitudinally through the window of the corrugated metal sheet layer and having a first end portion bearing against the supporting structure, for example against a bottom zone of the supporting structure, and a second portion end protruding into the tank to support the equipment to distance from the sheet metal layer,
the sealing barrier having connecting pieces disposed in the window around the support foot for sealingly connecting the support foot to a marginal portion of the corrugated metal sheet layer defining the window,
wherein the window interrupts the guidelines of a plurality of parallel ripples of said at least one series and the support leg is centered at a position between the guidelines of two parallel ripples of said plurality.
Selon d'autres modes de réalisation avantageux, une telle cuve peut présenter une ou plusieurs des caractéristiques suivantes.According to other advantageous embodiments, such a tank may have one or more of the following characteristics.
Le pied de support peut présenter diverses formes, notamment selon les caractéristiques de l'équipement à supporter. Selon un mode de réalisation, le pied de support présente au moins un côté latéral convexe, et la ligne directrice desdites deux ondulations entre lesquelles le pied de support est centré coupe le côté latéral convexe du pied de support. Selon un mode de réalisation, le pied de support présente une section circulaire.The support foot can have various forms, including the characteristics of the equipment to support. According to one embodiment, the support foot has at least one convex lateral side, and the guideline of said two corrugations between which the support foot is centered intersects the convex lateral side of the support foot. According to one embodiment, the support foot has a circular section.
Selon un mode de réalisation, la fenêtre interrompt les lignes directrices d'un nombre pair d'ondulations parallèles de ladite au moins une série, par exemple de deux ondulations parallèles de ladite au moins une série.According to one embodiment, the window interrupts the guidelines of an even number of parallel corrugations of said at least one series, for example two parallel corrugations of said at least one series.
Selon un mode de réalisation, le pied de support est centré sensiblement au milieu des lignes directrices des deux ondulations. En variante, le pied de support peut être décalé du milieu, de manière à être plus proche d'une ondulation que de l'autre, par exemple si un tel positionnement permet de réduire la longueur d'interruption des ondulations compte tenu de la forme du pied de support.According to one embodiment, the support foot is centered substantially in the middle of the guidelines of the two undulations. Alternatively, the support foot may be offset from the middle, so as to be closer to a corrugation than the other, for example if such a positioning makes it possible to reduce the interruption length of the corrugations taking into account the shape of the support foot.
Selon un mode de réalisation, ladite au moins une série d'ondulations parallèles est distribuée de manière équidistante. En variante, la série d'ondulations peut avoir, au moins localement, une distribution moins régulière.According to one embodiment, said at least one series of parallel corrugations is distributed equidistantly. Alternatively, the series of corrugations may have, at least locally, a less regular distribution.
Selon un mode de réalisation, les ondulations sont saillantes du côté d'une face interne de la barrière d'étanchéité destinée à être en contact avec un fluide.According to one embodiment, the corrugations are projecting on the side of an internal face of the sealing barrier intended to be in contact with a fluid.
Selon un mode de réalisation, les pièces de liaison comportent une pluralité de pièces de bout disposées à distance du pied de support de manière à fermer des extrémités interrompues des deux ondulations entre les lignes directrices desquelles le pied de support est centré. Par de telles pièces de bout, on peut fermer toutes les ondulations dont la fenêtre interrompt les lignes directrices, de manière à rétablir la continuité de la barrière étanche.According to one embodiment, the connecting pieces comprise a plurality of end pieces disposed at a distance from the support foot so as to close interrupted ends of the two corrugations between the guidelines of which the support leg is centered. By such end pieces, one can close all the corrugations whose window interrupts the guidelines, so as to restore the continuity of the sealed barrier.
Selon un mode de réalisation, le pied de support comporte une enveloppe creuse de forme globalement tubulaire dont l'axe longitudinal est sensiblement perpendiculaire à la paroi de cuve et une paroi de fermeture transversale fermant l'enveloppe de manière étanche pour réaliser la continuité de la barrière d'étanchéité au niveau du pied de support. Une telle forme creuse peut notamment être préférée pour limiter la section efficace du pied de support susceptible de créer un pont thermique.According to one embodiment, the support foot comprises a hollow shell of generally tubular shape whose longitudinal axis is substantially perpendicular to the tank wall and a transverse closure wall sealingly closing the envelope to achieve the continuity of the sealing barrier at the support foot. Such a hollow form may in particular be preferred to limit the effective cross section of the support foot capable of creating a thermal bridge.
Les pièces de liaison destinées à relier de manière étanche le pied de support à une portion marginale de la couche de tôle métallique ondulée peuvent présenter de nombreuses formes.The connecting pieces for sealingly connecting the support foot to a marginal portion of the corrugated metal sheet layer may have many shapes.
Selon un mode de réalisation, les pièces de liaison comportent un plateau annulaire lié à une paroi périphérique du pied de support au niveau de la couche de tôle métallique ondulée. Un tel plateau peut être pré assemblé au pied de support.According to one embodiment, the connecting pieces comprise an annular plate connected to a peripheral wall of the support foot at the level of the corrugated metal sheet layer. Such a tray can be pre-assembled to the support foot.
Selon un mode de réalisation, les pièces de liaison comportent une plaque intermédiaire présentant un premier bord soudé au plateau annulaire et un deuxième bord soudé à la portion marginale de la couche de tôle métallique ondulée délimitant la fenêtre.According to one embodiment, the connecting pieces comprise an intermediate plate having a first edge welded to the annular plate and a second edge welded to the marginal portion of the corrugated metal sheet layer delimiting the window.
Une telle cuve peut présenter une simple barrière d'étanchéité ou de multiples barrières étanches successives, par exemple par mesure de fiabilité et de sécurité. Selon un mode de réalisation correspondant, la barrière d'isolation thermique comporte une barrière d'isolation thermique primaire disposée du côté de la barrière d'étanchéité, dite barrière d'étanchéité primaire, et une barrière d'isolation thermique secondaire disposée du côté de la structure porteuse, la paroi de cuve comportant une barrière d'étanchéité secondaire disposée entre les barrières d'isolation thermique primaire et secondaire, la barrière d'étanchéité secondaire étant reliée de manière étanche à une paroi périphérique du pied de support.Such a tank may have a simple sealing barrier or multiple successive sealed barriers, for example by measuring reliability and safety. According to a corresponding embodiment, the thermal insulation barrier comprises a primary thermal insulation barrier disposed on the side of the sealing barrier, said primary sealing barrier, and a secondary thermal insulation barrier disposed on the side of the the carrier structure, the vessel wall having a secondary sealing barrier disposed between the primary and secondary thermal insulation barriers, the secondary sealing barrier being sealingly connected to a peripheral wall of the support foot.
Selon un mode de réalisation, les pièces de liaison comportent :
- une plaque de liaison présentant une ondulation parallèle à ladite au moins une série d'ondulations parallèles et disposée sur une ligne décalée latéralement à distance du pied de support par rapport à l'une des lignes directrices d'ondulation interrompues par la fenêtre et des pièces de dévoiement disposées de manière à relier à chaque fois une extrémité de l'ondulation de la plaque de liaison à une portion d'extrémité de l'ondulation dont la ligne directrice est interrompue par la fenêtre, de sorte que l'ondulation de la plaque de liaison et les deux pièces de dévoiement prolongent l'ondulation dont la ligne directrice est interrompue de manière étanche à travers la fenêtre en suivant la ligne décalée latéralement à distance du pied de support. La réalisation d'une ou plusieurs ondulations décalées de cette manière permet de limiter le nombre d'ondulations rendues discontinues par le pied de support, et donc de préserver davantage l'élasticité de la barrière étanche, notamment dans le cas ou un pied de support de diamètre relativement grand doit être mis en place.
- a connecting plate having a corrugation parallel to said at least one series of parallel corrugations and disposed on a line laterally offset away from the support leg with respect to one of the undulatory guidelines interrupted by the window and parts at each end of the corrugation of the connecting plate to an end portion of the corrugation whose guide line is interrupted by the window, so that the corrugation of the plate connection and the two pieces of deflection extend the corrugation whose guideline is interrupted in a sealed manner through the window along the line offset laterally away from the support foot. The realization of one or more offset waves of this This makes it possible to limit the number of corrugations made discontinuous by the support foot, and thus to further preserve the elasticity of the watertight barrier, especially in the case where a relatively large diameter support foot has to be put in place.
Les dispositions et caractéristiques énoncées ci-dessus vis-à-vis d'une série d'ondulations parallèles peuvent, le cas échéant, être appliquées vis-à-vis de plusieurs séries d'ondulations parallèles ayant des directions différentes. Selon un mode de réalisation correspondant, la couche de tôle métallique ondulée présente une première série d'ondulations parallèles et une deuxième série d'ondulations parallèles qui est sécante à la première série d'ondulations parallèles au niveau de croisements, la fenêtre interrompant les lignes directrices d'une première pluralité des ondulations parallèles de la première série et/ou les lignes directrices d'une deuxième pluralité des ondulations parallèles de la deuxième série, le pied de support étant centré à une position située entre les lignes directrices de deux ondulations parallèles de la première pluralité et/ou entre les lignes directrices de deux ondulations parallèles de la deuxième pluralité.The arrangements and features set forth above with respect to a series of parallel corrugations may, where appropriate, be applied to several series of parallel corrugations having different directions. According to a corresponding embodiment, the corrugated metal sheet layer has a first series of parallel corrugations and a second series of parallel corrugations which is secant to the first series of parallel corrugations at crossings, the window interrupting the lines. of a first plurality of parallel corrugations of the first series and / or the guidelines of a second plurality of parallel corrugations of the second series, the support leg being centered at a position between the guidelines of two parallel corrugations of the first plurality and / or between the guidelines of two parallel corrugations of the second plurality.
Selon un mode de réalisation préféré, la première série d'ondulations parallèles est perpendiculaire à la deuxième série d'ondulations parallèles. Ainsi l'élasticité de la membrane étanche peut être bien équilibrée dans différentes directions.According to a preferred embodiment, the first series of parallel corrugations is perpendicular to the second series of parallel corrugations. Thus the elasticity of the waterproof membrane can be well balanced in different directions.
La fenêtre précitée peut présenter différentes formes, notamment en fonction de la forme du pied de support et/ou de la forme des éléments constitutifs de la couche de tôle métallique ondulée. Selon un mode de réalisation, la fenêtre est un quadrilatère, par exemple rectangle ou carré ou parallélogramme, comportant deux côtés parallèles à la première série d'ondulations et deux côtés parallèles à la deuxième série d'ondulations.The aforementioned window may have different shapes, in particular depending on the shape of the support foot and / or the shape of the constituent elements of the corrugated metal sheet layer. According to one embodiment, the window is a quadrilateral, for example rectangle or square or parallelogram, having two sides parallel to the first series of corrugations and two sides parallel to the second series of corrugations.
Selon un mode de réalisation, le pied de support est disposé à la base d'un mât de déchargement de la cuve, par exemple pour supporter une pompe.According to one embodiment, the support foot is disposed at the base of an unloading mast of the tank, for example to support a pump.
Une idée à la base de l'invention est de supporter un équipement devant être immergé dans une cuve sur un pied prenant appui directement ou indirectement sur la structure porteuse, pour éviter ou limiter un effort exercé sur une membrane d'étanchéité ondulée relativement fragile. Une autre idée à la base de l'invention est de disposer un tel pied de support d'une manière qui ne mette pas en péril les propriétés mécaniques essentielles de la membrane d'étanchéité ondulée, notamment son étanchéité et sa résistance à la contraction thermique ou aux efforts de pression. Certains aspects de l'invention partent de l'idée d'interrompre des ondulations d'une membrane d'étanchéité ondulée au niveau d'une zone de passage d'un pied de support, et de positionner ce pied de support à un emplacement qui permette de limiter la longueur de ces interruptions, afin de limiter la perte d'élasticité de la membrane pouvant résulter de telles interruptions. D'autres aspects de l'invention partent de l'idée de déplacer localement des ondulations afin de contourner la zone de passage du pied de support sans interrompre ces ondulations.An idea underlying the invention is to support equipment to be immersed in a tank on a foot bearing directly or indirectly on the support structure, to avoid or limit a force exerted on a relatively fragile corrugated waterproofing membrane. Another idea underlying the invention is to have such a support foot in a way that does not jeopardize the essential mechanical properties of the corrugated waterproofing membrane, including its sealing and resistance to thermal contraction or pressure efforts. Certain aspects of the invention are based on the idea of interrupting undulations of a corrugated waterproofing membrane at a passage area of a support foot, and positioning this support foot at a location which to limit the length of these interruptions, in order to limit the loss elasticity of the membrane that may result from such interruptions. Other aspects of the invention start from the idea of locally displacing undulations in order to bypass the zone of passage of the support foot without interrupting these undulations.
L'invention sera mieux comprise, et d'autres buts, détails, caractéristiques et avantages de celle-ci apparaîtront plus clairement au cours de la description suivante de plusieurs modes de réalisation particuliers de l'invention, donnés uniquement à titre illustratif et non limitatif, en référence aux dessins annexés.The invention will be better understood, and other objects, details, characteristics and advantages thereof will appear more clearly in the course of the following description of several particular embodiments of the invention, given solely for illustrative and non-limiting purposes. with reference to the accompanying drawings.
Sur ces dessins :
- La
figure 1 est une représentation schématique partielle en coupe d'une cuve étanche et isolante selon un mode de réalisation, - La
figure 2 est une représentation en perspective, en section transversale selon la ligne II-II de lafigure 3 , d'un pied de support et d'une structure de paroi de cuve pouvant être utilisés dans la cuve de lafigure 1 , - La
figure 3 est une vue de dessus du pied de support de lafigure 2 et d'une zone de la paroi de cuve autour du pied de support, - La
figure 4 est une représentation analogue à lafigure 2 à un stade intermédiaire de montage de la paroi de cuve, - La
figure 5 est une vue de détail agrandie de la zone V de lafigure 4 , - La
figure 6 est une vue de dessus de la zone de paroi de cuve de lafigure 4 montrant la réalisation de la barrière d'étanchéité secondaire, - La
figure 7 est une vue analogue à lafigure 6 montrant un stade intermédiaire de montage de la barrière d'étanchéité primaire, - La
figure 8 est une vue en perspective d'une pièce de bout pouvant être utilisée dans la fabrication de la barrière d'étanchéité primaire, - La
figure 9 est une vue analogue à lafigure 3 représentant un autre mode de réalisation de la barrière d'étanchéité primaire autour du pied de support, - La
figure 10 est une vue en perspective d'une pièce de dévoiement pouvant être utilisée dans la fabrication de la barrière d'étanchéité primaire de lafigure 9 .
- The
figure 1 is a partial schematic sectional representation of a sealed and insulating tank according to one embodiment, - The
figure 2 is a perspective representation, in cross section along line II-II of thefigure 3 , a support leg and a vessel wall structure that can be used in the tank of thefigure 1 , - The
figure 3 is a top view of the support foot of thefigure 2 and an area of the vessel wall around the support foot, - The
figure 4 is a representation similar to thefigure 2 at an intermediate stage of mounting the vessel wall, - The
figure 5 is an enlarged detail view of area V of thefigure 4 , - The
figure 6 is a top view of the tank wall area of thefigure 4 showing the realization of the secondary sealing barrier, - The
figure 7 is a view similar to thefigure 6 showing an intermediate stage of assembly of the primary sealing barrier, - The
figure 8 is a perspective view of an end piece that can be used in the manufacture of the primary sealing barrier, - The
figure 9 is a view similar to thefigure 3 showing another embodiment of the primary sealing barrier around the support foot, - The
figure 10 is a perspective view of a deflection piece that can be used in the manufacture of the primaryfigure 9 .
Sur la
La cuve 1 peut être réalisée selon différentes géométries bien connues, par exemple une géométrie prismatique dans la coque d'un navire ou une géométrie cylindrique à terre ou autre. Par ailleurs, de nombreuses méthodes sont disponibles pour réaliser les barrières d'isolation thermique et d'étanchéité, par exemple à partir d'éléments préfabriqués.The
Dans la paroi de fond 3 de la cuve, on a représenté un élément rigide allongé, constituant un pied de support 10, qui s'étend à travers la barrière d'isolation thermique 7 et la barrière d'étanchéité 6, de sorte qu'un bout prend appui contre la paroi de fond 5 de la structure porteuse et que l'autre bout fait saillie dans la cuve à distance de la barrière d'étanchéité 6. Le pied de support 10 peut par exemple servir à supporter un équipement 9 devant être immergé dans la cuve. Par exemple, pour supporter une pompe de déchargement, il peut être disposé à la base d'un mât de pompage de la cuve, non représenté. Bien que le pied de support soit ici représenté sur une paroi de fond de la cuve, un élément rigide similaire peut être disposé de la même manière à d'autres emplacements dans la cuve, par exemple comme élément de support ou d'espacement pour maintenir un objet quelconque à distance de la paroi de cuve.In the bottom wall 3 of the vessel, there is shown an elongate rigid member, constituting a
Pour réaliser la barrière d'étanchéité 6, il est possible d'utiliser des plaques de fine tôle métallique présentant des ondulations qui forment des zones élastiques pour absorber la contraction thermique et les efforts de pression statiques et dynamiques. De telles barrières d'étanchéité en tôle ondulée ou gaufrée ont notamment été décrites dans
En référence à la
Les plaques étanches 11 comportent, sur leur face interne, une première série d'ondulations dites longitudinales 15 et une seconde série d'ondulations dites transversales 16 dont les directions respectives sont perpendiculaires. La première série d'ondulations 15 présente une hauteur inférieure à la seconde série d'ondulations 16. Ainsi, les ondulations 15 sont discontinues au niveau de leurs croisements 18 avec les ondulations 16 qui sont continues. Les ondulations longitudinales 15 et transversales 16 sont en saillie vers l'intérieur de la cuve 1.The sealed
Le pied de support 10 présente ici une forme de révolution à section circulaire, avec une partie inférieure tronconique 13 qui se raccorde au niveau de son extrémité de plus petit diamètre 17 à une partie supérieure cylindrique 14. La base de plus grand diamètre de la partie tronconique 13 est en appui contre la paroi 5 de la structure porteuse. La partie tronconique 13 s'étend à travers l'épaisseur de la paroi de cuve au-delà du niveau de la barrière d'étanchéité 6. La partie cylindrique 14 est fermée de manière étanche par une plaque circulaire 19, qui peut être par exemple soudée sur un rebord intérieur non représenté de la partie cylindrique 14.The
Pour permettre le passage du pied de support 10, les plaques étanches ondulées 11 formant la barrière d'étanchéité 6 sont découpées de manière à délimiter une fenêtre carrée 25 autour du pied de support 10. Pour réaliser la continuité de la barrière d'étanchéité 6 au niveau de la fenêtre 25, un assemblage étanche de pièces de liaisons est réalisé entre le pied de support 10 et les plaques étanches 11. Comme le diamètre du pied de support 10 est supérieur à l'espacement entre les ondulations de la première série 15, certaines des ondulations longitudinales indiquées au chiffre 20 et dont la ligne directrice A coupe le pied de support 10 ont été interrompues au niveau de la fenêtre 25. De même, comme le diamètre du pied de support 10 est supérieur à l'espacement entre les ondulations de la deuxième série 16, certaines des ondulations transversales indiquées au chiffre 21 et dont la ligne directrice B coupe le pied de support 10 ont été interrompues au niveau de la fenêtre entourant le pied de support.To allow the passage of the
Par ailleurs, comme visible sur la
Le centre C du pied de support 10 est positionné entre les lignes directrices A des ondulations interrompues 20 et entre les lignes directrices B des ondulations interrompues 21, et plus précisément au milieu de ces lignes directrices sur la
Dans le cas d'une section circulaire, le centrage du pied de support à mi-distance entre les ondulations interrompues 20 et à mi-distance entre les ondulations interrompues 21 offre un résultat optimal. Toutefois, d'autres formes de section et d'autres positionnements du pied peuvent aussi être considérés. Un principe pouvant servir à adapter à chaque fois le positionnement du pied de support entre les ondulations est de choisir une position qui minimise, ou du moins diminue, la dimension transversale du pied de support que coupe la ligne directrice de l'ondulation interrompue. Dans le cas où la géométrie particulière du pied de support et/ou la distribution particulière des ondulations de la membrane implique d'interrompre plusieurs ondulations sur des longueurs différentes, un paramètre d'optimisation pertinent pour adapter le positionnement du pied de support peut être la longueur de la plus longue interruption ou la longueur cumulée des interruptions obtenues.In the case of a circular section, the centering of the support foot halfway between the interrupted
Sur la
En référence aux
La
Pour se raccorder à la barrière d'étanchéité secondaire, le pied de support 10 comporte un plateau secondaire 23 de forme carrée fixé autour de la partie tronconique 13 à une hauteur correspondant à la surface supérieure de la barrière d'isolation thermique secondaire 22 et de la barrière étanche secondaire qui est très mince. Pour se raccorder à la barrière d'étanchéité primaire, le pied de support 10 comporte un plateau primaire 24 de forme ronde fixé autour de la partie tronconique 13 à une hauteur correspondant à la surface supérieure de la barrière d'isolation thermique primaire 26. Les plateaux 23 et 24 peuvent être réalisés d'un seul tenant avec le pied de support 10.To connect to the secondary sealing barrier, the
Au-dessous du plateau secondaire 23, la barrière d'isolation secondaire 22 comporte un bourrage de laine de verre 27 qui présente également un contour extérieur carré. Au-dessous du plateau primaire 24, la barrière d'isolation primaire 26 comporte un bourrage de laine de verre 28 qui présente également un contour extérieur circulaire.Below the
Autour du bourrage 27 et du plateau 23, on réalise la barrière d'isolation secondaire, la barrière d'étanchéité secondaire et la barrière d'isolation primaire au moyen de quatre panneaux d'angle, dont l'un est visible sur la partie droite de la
Les quatre panneaux d'angle 30 bordent par leurs côtés intérieurs le contour du bourrage 27 et du plateau 23. Les dimensions des blocs 31 sont conçues pour ménager des espaces entre eux sous la forme de quatre cheminées radiales 34 situées à chaque fois entre les faces d'extrémité de deux blocs inférieurs 31 voisins. Pour assurer une continuité de la barrière d'isolation primaire 22, chacune des cheminées 34 est bourrée d'une feuille de fibre de verre 35. La porosité de la fibre de verre des feuilles 35 et du bourrage 27 rend possible la circulation de gaz à travers la barrière d'isolation primaire 22, notamment pour l'inertage de la paroi de cuve à l'azote.The four
La
La
Comme visible sur le détail de la
Comme visible sur la
De retour sur les
Un exemple de réalisation d'une pièce de bout 50 est représenté sur la
Le découpage des blocs isolants et autres éléments préfabriqués représentés sur les
Comme mieux visible sur la
Sur la
Pour cela, la barrière d'étanchéité 106 est modifiée au niveau de deux fenêtres carrées concentriques 125 et 160. A l'extérieur de la fenêtre 160, la barrière d'étanchéité 106 est constituée de plaques étanches 111 portant des ondulations longitudinales 115 et transversales 116 distribuées de manière équidistantes. Entre la fenêtre 160 et la fenêtre 125, la barrière d'étanchéité 106 est continuée avec d'autres plaques étanches ondulées, c'est-à-dire deux plaques 161 globalement en forme de C dans le cas présent, qui portent des ondulations distribuées différemment, c'est-à-dire moins espacées dans le cas présent. Les ondulations des plaques 161 constituent notamment un segment central 162, respectivement 163, décalé à distance du pied de support 110, pour chacune des ondulations 158, respectivement 159. Enfin, la structure de la barrière d'étanchéité 106 au niveau de la fenêtre 125 et à l'intérieur de celle-ci est similaire au mode de réalisation de la
Pour réaliser la jonction au niveau de la fenêtre 160 entre le segment central 162 ou 163 de l'ondulation 158 ou 159 et les portions des ondulations situées à l'extérieur de la fenêtre 160, des pièces de dévoiement 170 sont employées.To make the junction at the
Un exemple de réalisation d'une pièce de dévoiement 170 est représenté sur la
Dans un autre mode de réalisation non représenté, convenant par exemple pour un pied de support de plus petit diamètre, toutes les ondulations dont la fenêtre interrompt la ligne directrice, par exemple deux ondulations de chaque série comme sur la
Dans les modes de réalisation décrits ci-dessus, la barrière d'étanchéité primaire est réalisée en tôle métallique comportant deux séries d'ondulations mutuellement perpendiculaires. Toutefois, on peut employer de manière similaire d'autres types de membranes métalliques ondulées avec moins ou plus d'ondulations et/ou un agencement différent des ondulations.In the embodiments described above, the primary sealing barrier is made of sheet metal having two sets of mutually perpendicular corrugations. However, other types of corrugated metal membranes with less or more corrugations and / or a different arrangement of the corrugations can be similarly employed.
Bien que l'invention ait été décrite en liaison avec plusieurs modes de réalisation particuliers, il est bien évident qu'elle n'y est nullement limitée et qu'elle comprend tous les équivalents techniques des moyens décrits ainsi que leurs combinaisons si celles-ci entrent dans le cadre de l'invention.Although the invention has been described in connection with several particular embodiments, it is obvious that it is not limited thereto and that it comprises all the technical equivalents of the means described and their combinations if they are within the scope of the invention.
L'usage du verbe « comporter », « comprendre » ou « inclure » et de ses formes conjuguées n'exclut pas la présence d'autres éléments ou d'autres étapes que ceux énoncés dans une revendication. L'usage de l'article indéfini « un » ou « une » pour un élément ou une étape n'exclut pas, sauf mention contraire, la présence d'une pluralité de tels éléments ou étapes. Plusieurs moyens ou modules peuvent être représentés par un même élément matériel.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. Several means or modules can be represented by the same hardware element.
Dans les revendications, tout signe de référence entre parenthèses ne saurait être interprété comme une limitation de la revendication.In the claims, any reference sign in parentheses can not be interpreted as a limitation of the claim.
Claims (18)
- Sealed and insulative tank including a support structure, the tank including a tank wall (3) disposed along the support structure (4) within the support structure, the tank wall including:a sealing barrier (6, 106),a thermal insulation barrier (7, 22, 26) disposed between the sealing barrier and the support structure and having a support surface for the sealing barrier, wherein the tank further includesa pedestal (10, 110) for equipment immersed in the sealed tank,the sealing barrier including a layer of corrugated sheet metal (11, 111) having at least one series of parallel corrugations (15; 115), the layer of corrugated sheet metal being interrupted by a window (25, 125) around the pedestal,the pedestal extending longitudinally through the window in the layer of corrugated sheet metal and having a first end portion bearing against the support structure and a second end portion projecting into the tank to support the equipment at a distance from the sheet metal layer,the sealing barrier including connecting parts (24, 45, 50) disposed in the window around the pedestal to join the pedestal in sealed manner to a marginal portion of the layer of corrugated sheet metal delimiting the window,wherein the window (25, 125) interrupts the directrices of a plurality (20, 120, 158) of the parallel corrugations of said at least one series and the pedestal is centred at a position situated between the directrices (A) of two parallel corrugations (20, 120) of said plurality.
- Tank according to Claim 1, wherein the pedestal has at least one convex lateral side (13),
the directrices of the two corrugations (20, 120) between which the pedestal is centred intersecting the convex lateral side of the pedestal, the convex lateral side being a section of the pedestal located at the level of the two corrugations. - Tank according to Claim 1 or 2, wherein the window interrupts the directrices (A) of an even number of parallel lines of said at least one series.
- Tank according to Claim 3, wherein the window interrupts the directrices of two parallel corrugations of said at least one series.
- Tank according to any of Claims 1 to 4, wherein the pedestal is centred substantially in the middle of the directrices of the two corrugations.
- Tank according to any of Claims 1 to 5, wherein the pedestal has a circular cross section.
- Tank according to any of Claims 1 to 6, wherein said at least one series of parallel corrugations (15, 115) is equidistantly distributed.
- Tank according to any of Claims 1 to 7, wherein the corrugations (15; 115) project on the side of an internal face of the sealing barrier intended to be in contact with a fluid.
- Tank according to any of Claims 1 to 8, wherein the connecting parts include a plurality of end parts (50, 150) disposed at a distance from the pedestal in such as manner as to close interrupted ends of the two corrugations (20, 120) between which the pedestal is centred.
- Tank according to any of Claims 1 to 9, wherein the pedestal includes a hollow envelope (13, 14) of generally tubular shape the longitudinal axis of which is substantially perpendicular to the tank wall and a transverse closure wall (19) closing the envelope in sealed manner to produce the continuity of the sealing barrier at the level of the pedestal.
- Tank according to any of Claims 1 to 10, wherein the connecting parts include an annular plate (24) joined to a peripheral wall of the pedestal at the level of the layer of corrugated sheet metal (11, 111).
- Tank according to Claim 11, wherein the connecting parts include an intermediate plate (45, 145) having a first edge welded to the annular plate and a second edge welded to the marginal portion of the corrugated sheet metal layer (11, 161) delimiting the window.
- Tank according to any of Claims 1 to 12, wherein the thermal insulation barrier includes a primary thermal insulation barrier (26) disposed on the side of the sealing barrier (6), referred to as the primary sealing barrier, and a secondary thermal insulation barrier (22) disposed on the side of the support structure, the tank wall including a secondary sealing barrier (23, 32, 36, 38) disposed between the primary and secondary thermal insulation barriers, the secondary sealing barrier being joined in sealed manner to a peripheral wall (13) of the pedestal.
- Tank according to any of Claims 1 to 13, wherein the connecting parts include:a connecting plate (161) having a corrugation (162) parallel to said at least one series of parallel corrugations (115) and disposed on a line offset laterally from the pedestal relative to one of the directrices interrupted by the window, and bend parts (170) disposed in such a manner that each joins one end of the corrugation of the connecting plate to an end portion of the corrugation (158) the directrix of which is interrupted by the window so that the corrugation (162) of the connecting plate and the two bend parts extend the corrugation (158) the directrix of which is interrupted in sealed manner across the window along the line offset laterally from the pedestal (110).
- Tank according to any of Claims 1 to 14, wherein the corrugated sheet metal layer includes a first series of parallel corrugations (15, 115) and a second series of parallel corrugations (16, 116) that intersects the first series of parallel corrugations at crossing points, the window interrupting the directrices of a first plurality of parallel corrugations of the first series and/or the directrices of a second plurality of parallel corrugations of the second series, the pedestal being centred at a position situated between the directrices (A) of two parallel corrugations of the first plurality and/or between the directrices (B) of two parallel corrugations of the second plurality.
- Tank according to Claim 15, wherein the first series of parallel corrugations is perpendicular to the second series of parallel corrugations.
- Tank according to Claim 15 or 16, wherein the window (25, 125) is a quadrilateral having two sides parallel to the first series of corrugations and two sides parallel to the second series of corrugations.
- Tank according to any of Claims 1 to 17, wherein the pedestal (10, 110) is disposed at the base of a mast for discharging the tank.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14157675.1A EP2740987B1 (en) | 2010-06-17 | 2011-05-24 | Isolating and sealing vessel comprising a support leg |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1054822A FR2961580B1 (en) | 2010-06-17 | 2010-06-17 | WATERPROOF AND INSULATED TANK WITH SUPPORT FOOT |
PCT/FR2011/051168 WO2011157915A1 (en) | 2010-06-17 | 2011-05-24 | Sealed and insulating vessel comprising a support foot |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14157675.1A Division EP2740987B1 (en) | 2010-06-17 | 2011-05-24 | Isolating and sealing vessel comprising a support leg |
EP14157675.1A Division-Into EP2740987B1 (en) | 2010-06-17 | 2011-05-24 | Isolating and sealing vessel comprising a support leg |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2583021A1 EP2583021A1 (en) | 2013-04-24 |
EP2583021B1 true EP2583021B1 (en) | 2014-07-30 |
Family
ID=42937053
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11727255.9A Active EP2583021B1 (en) | 2010-06-17 | 2011-05-24 | Sealed and insulating vessel comprising a support foot |
EP14157675.1A Active EP2740987B1 (en) | 2010-06-17 | 2011-05-24 | Isolating and sealing vessel comprising a support leg |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14157675.1A Active EP2740987B1 (en) | 2010-06-17 | 2011-05-24 | Isolating and sealing vessel comprising a support leg |
Country Status (13)
Country | Link |
---|---|
EP (2) | EP2583021B1 (en) |
JP (2) | JP5530030B2 (en) |
KR (2) | KR101722377B1 (en) |
CN (2) | CN103899912B (en) |
AU (1) | AU2011266930B2 (en) |
BR (2) | BR112012032016B1 (en) |
ES (2) | ES2509715T3 (en) |
FR (1) | FR2961580B1 (en) |
MY (1) | MY182133A (en) |
RU (2) | RU2526473C1 (en) |
SG (2) | SG10201400698TA (en) |
TW (2) | TWI505979B (en) |
WO (1) | WO2011157915A1 (en) |
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FR3009745B1 (en) * | 2013-08-15 | 2016-01-29 | Gaztransp Et Technigaz | SEALED AND THERMALLY INSULATING TANK WITH ANGLE PIECE |
KR101523904B1 (en) * | 2013-10-04 | 2015-06-01 | 삼성중공업 주식회사 | Base support, and connection structure between base support and insulation barrier of cargo tank |
KR101523906B1 (en) * | 2013-10-04 | 2015-06-01 | 삼성중공업 주식회사 | Connection structure between base support and insulation barrier of cargo tank |
KR101588658B1 (en) | 2013-10-04 | 2016-01-27 | 삼성중공업 주식회사 | Connection structure between base support and insulation barrier of cargo tank |
KR101617026B1 (en) * | 2013-12-27 | 2016-04-29 | 삼성중공업 주식회사 | Cargo for liquefied gas |
FR3018338B1 (en) * | 2014-03-04 | 2016-03-25 | Gaztransp Et Technigaz | SEALED AND INSULATING TANK WITH A DEFLECTION ELEMENT FOR GAS FLOW AT AN ANGLE |
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SG11201700049UA (en) * | 2014-07-04 | 2017-02-27 | Daewoo Shipbuilding & Marine | Liquefied natural gas storage tank and insulating wall for liquefied natural gas storage tank |
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FR3078135B1 (en) * | 2018-02-20 | 2021-01-15 | Gaztransport Et Technigaz | INSTALLATION FOR THE STORAGE AND TRANSPORT OF A CRYOGENIC FLUID ON BOARD ON A SHIP |
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-
2010
- 2010-06-17 FR FR1054822A patent/FR2961580B1/en not_active Expired - Fee Related
-
2011
- 2011-05-24 KR KR1020147008815A patent/KR101722377B1/en not_active Application Discontinuation
- 2011-05-24 JP JP2013514751A patent/JP5530030B2/en active Active
- 2011-05-24 RU RU2012154217/06A patent/RU2526473C1/en active
- 2011-05-24 CN CN201410131602.0A patent/CN103899912B/en active Active
- 2011-05-24 AU AU2011266930A patent/AU2011266930B2/en active Active
- 2011-05-24 KR KR1020137001183A patent/KR101512963B1/en active IP Right Grant
- 2011-05-24 ES ES11727255.9T patent/ES2509715T3/en active Active
- 2011-05-24 BR BR112012032016-5A patent/BR112012032016B1/en not_active IP Right Cessation
- 2011-05-24 CN CN201180027512.1A patent/CN102933888B/en active Active
- 2011-05-24 MY MYPI2014002142A patent/MY182133A/en unknown
- 2011-05-24 EP EP11727255.9A patent/EP2583021B1/en active Active
- 2011-05-24 WO PCT/FR2011/051168 patent/WO2011157915A1/en active Application Filing
- 2011-05-24 SG SG10201400698TA patent/SG10201400698TA/en unknown
- 2011-05-24 SG SG2012078580A patent/SG185001A1/en unknown
- 2011-05-24 EP EP14157675.1A patent/EP2740987B1/en active Active
- 2011-05-24 BR BR122014005768A patent/BR122014005768A2/en not_active Application Discontinuation
- 2011-05-24 ES ES14157675T patent/ES2874476T3/en active Active
- 2011-05-31 TW TW103111525A patent/TWI505979B/en not_active IP Right Cessation
- 2011-05-31 TW TW100119088A patent/TWI510419B/en not_active IP Right Cessation
-
2014
- 2014-03-17 JP JP2014052930A patent/JP5746778B2/en active Active
- 2014-03-31 RU RU2014112235A patent/RU2662265C2/en active
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