KR20140046490A - Sealed and insulating vessel comprising a support foot - Google Patents

Abstract

The tank wall includes a sealing barrier 6 and a support pedestal 10 for the equipment article that is immersed in the sealing tank. The sealing barrier comprises a pleated metal sheet layer 11 having at least one row of pleated pleats 15, the pleated metal sheet layer being suspended in a window 25 surrounding the support pedestal. The support pedestal extends in the longitudinal direction through the window. The sealing barrier includes connecting portions 45, 50 for sealingly connecting the support pedestal to the edge of the corrugated metal sheet layer defining the window. The window 25 interrupts the lines of the plurality of rows of parallel corrugations 20 and the support pedestal is centered at a position located between the lines A of the two parallel corrugations 20. .

Description

SEALLED AND INSULATING VESSEL COMPRISING A SUPPORT FOOT}

FIELD OF THE INVENTION The present invention relates to the field of manufacturing sealed and insulated tanks disposed within a support structure, and more particularly to the manufacture of the walls of such tanks, which must accommodate pedestals.

Sealed and insulated tanks are used in a variety of industries to store hot or cold articles. For example, in the energy sector, liquefied natural gas (LNG) is a liquid that can be stored at atmospheric pressure of about −163 ° C. in a storage tank on land or board flooting structure. Such floating structures include methane tankers for transporting products and offshore installations, especially known as FPSOs and FSRUs, for storing, liquefying, or regasifying articles.

In the membrane reservoir, a corrugated sheet metal layer is used to produce the sealing barrier, which is also resistant to forces resulting from hydrostatic pressure, dynamic pressure in the case of transport of cargo, and / or temperature changes, for example. Have sufficient elasticity. However, such a sealing barrier and the thermal insulation material beneath it are relatively fragile and may not necessarily support heavy equipment, such as pumps, which are immersed in the bottom of the tank.

In one embodiment, the invention provides a sealed and insulated tank disposed on a support structure, the tank comprising a tank wall disposed along the support structure, the tank wall:

Sealing barrier,

An insulating barrier disposed between the sealing barrier and the support structure and having a support surface for the sealing barrier, and

A pedestal for equipment submerged in a sealed tank,

The sealing barrier comprises a corrugated sheet metal layer having at least one series of parallel corrugations, the corrugated sheet metal layer being interrupted by a window around the pedestal,

The pedestal extends longitudinally through the window within the corrugated sheet metal layer and abuts against the support structure, for example a first end that abuts against the bottom area of the support structure, and is spaced apart from the corrugated sheet metal layer. Has a second end projecting into the tank to support the machined equipment,

The sealing barrier includes a connecting portion disposed in the window around the pedestal to connect with the pedestal in a sealed manner against the edge of the layer of corrugated sheet metal that delimits the window,

The window is interrupted by at least one row of parallels of the plurality of parallel folds and the pedestal is centered at a position located between the plurality of parallel lines of the two folds.

In another useful embodiment, a tank of this kind has one or more of the following features.

The pedestal can have various shapes, in particular depending on the nature of the equipment to be supported. In one embodiment, the pedestal has at least one convex side and the convex side of the pedestal intersects the sublines of the two corrugations with the pedestal centered therebetween. In one embodiment, the pedestal has a circular cross section.

In one embodiment, the window interrupts even-numbered sublines of the at least one row of parallel folds, for example two parallel folds of the at least one row.

In one embodiment, the pedestal is centered substantially in the middle of the two creases' sublines. Alternatively, if such a position makes it possible to reduce the length of the interruption of the crease given to the shape of the pedestal, the pedestal may be offset from the middle to be closer to one crease than the other crease. have.

In one embodiment, the at least one row of parallel folds are evenly distributed. Alternatively, the rows of wrinkles may have a distribution that is at least locally less regular.

In one embodiment, the crease protrudes from the side of the inner surface of the sealing barrier intended to contact the fluid.

In one embodiment, the connecting portion includes a plurality of end portions disposed spaced from the pedestal so as to be close to the distal ends of the two creases, which are centered between the sublines of the creases. By this end portion, all of the corrugations in which the windows interrupt the sublines can be closed to reset the continuity of the sealing barrier.

In one embodiment, the pedestal closes the envelope in a sealed manner to provide continuity of the sealing barrier at the height of the pedestal and a hollow envelope that is generally tubular in shape, the longitudinal axis being substantially perpendicular to the tank wall. A transverse closing wall. It is particularly desirable that such hollow shapes limit the effective cross section of the pedestal that is prone to creating thermal bridges.

The connecting portion intended for sealingly connecting the pedestal to the edge of the layer of corrugated sheet metal can have a number of shapes.

In one embodiment, the connecting portion comprises an annular plate connected to the peripheral wall of the pedestal at the height of the corrugated sheet metal layer. Such plates may be pre-assembled into pedestals.

In one embodiment, the connecting portion comprises an intermediate plate having a first edge welded to the annular plate and a second edge welded to the edge of the corrugated sheet metal layer defining the window.

Such a tank may have a single sealing barrier or a continuous multiple sealing barrier, for example for reasons of reliability and safety. In one corresponding embodiment, the thermal insulation barrier comprises a primary thermal insulation barrier disposed on the side of the sealing barrier, referred to as the primary sealing barrier, and an auxiliary thermal insulation barrier disposed on the side of the support structure, wherein the tank wall is An auxiliary sealing barrier disposed between the main insulating barrier and the auxiliary insulating barrier, the auxiliary sealing barrier being connected in a sealed manner against the peripheral wall of the pedestal.

In one embodiment, the connecting portion is:

A connecting plate, the connecting plate being disposed on a line that is parallel to the at least one row of parallel corrugations and spaced laterally offset from the pedestal with respect to one of the corrugated sublines interrupted by the window. Having a bent portion disposed respectively for connecting the ends of the pleats of the section and the connecting plate to the end portions of the ridges of the pleated section interrupted by the window, so that the pleats and the two bend portions of the connecting plate extend the pleats; The negative directrix is interrupted in a sealed manner by the window along a line laterally offset from the pedestal. The formation of one or more offset corrugations in this way limits the number of corrugations that provide discontinuity by the pedestals, thereby maintaining the elasticity of the improved sealing barrier, especially when relatively large diameter pedestals must be assembled. do.

The arrangements and features described above with respect to one row of parallel folds may be applied to a plurality of parallel folds of one row having different directions as necessary. In a corresponding embodiment, the corrugated sheet metal layer has a parallel corrugation of the first row and a second corrugation of the corrugation of the second row that intersects the parallel corrugation of the first row at the intersection, and the window comprises a first plurality of first articles. Stops the line of parallel folds of one row of parallel folds and / or the line of parallel folds of the second plurality of second rows, wherein the pedestal is between the lines of the first plurality of two parallel folds and / or of the second plurality of It is centered at a position located between the sublines of the two parallel corrugations of the.

In one preferred embodiment, the parallel folds of the first row are perpendicular to the parallel folds of the second row. Thus, the elasticity of the sealed membrane in different directions can be balanced.

The windows described above may have various shapes, in particular depending on the shape of the pedestal and / or the shape of the components of the corrugated sheet metal layer. In one embodiment, the window is a quadrilateral, for example rectangular, square or parallelogram, having two sides parallel to the folds in the first row and two sides parallel to the folds in the second row.

In one embodiment, the pedestal is arranged at the base of the mast for discharging the tank, for example for discharging the tank to support the pump.

One basic concept of the present invention is to support the equipment to be immersed in a tank on a pedestal that directly or indirectly supports the support structure so as to prevent or limit the force exerted on the relatively fragile corrugated sealing membrane. Another basic concept of the present invention is to provide such a pedestal in a way that does not impair the essential mechanical properties of the corrugated sealing membrane, in particular the sealing effect and resistance to heat shrinkage or pressure. Some aspects of the present invention begin with the concept of stopping the pleats of the pleated sealing membrane in the region defined hereinafter, which region is such that the pedestal passes and limits the loss of elasticity of the membrane that can result from such interruption. It is an area for positioning this pedestal in a position that makes it possible to limit the length of the interruptions. Another aspect of the invention starts with the concept of locally displacing the crease to bypass the area through which the pedestal passes through without interruption of the crease.

The invention will be better understood in the course of the following description of particular embodiments of the invention, which are chosen by way of illustrative and non-limiting examples, given in the following with reference to the accompanying drawings, in which: The features, advantages, and advantages will become more apparent.

1 is a partial cross-sectional view of a sealed and insulated tank of one embodiment of the present invention,
FIG. 2 is a partial cross-sectional perspective view taken along line II-II in FIG. 3 of a pedestal and tank wall structure that may be used in the tank of FIG. 1, FIG.
3 is a plan view of FIG. 2 showing the area of the tank wall around the pedestal,
4 is a view similar to FIG. 2 in an intermediate step of assembling the tank wall,
5 is a detailed view showing the region V of FIG. 4 at a large ratio,
6 is a plan view of the tank wall region of FIG. 4 showing a state of manufacture of the secondary sealing barrier;
FIG. 7 is a view similar to FIG. 6 showing an intermediate step of assembling the main sealing barrier;
8 is a perspective view of an end piece that may be used in the manufacture of the main sealing barrier;
FIG. 9 is a view similar to FIG. 3 showing a main sealing barrier around a pedestal in another embodiment of the present invention;
10 is a perspective view of a bend portion that may be used in the manufacture of the main sealing barrier from FIG. 9.

1 shows a part of a sealed and insulated tank 1 consisting of tank walls 2 and 3 fixed to the inner surface of the corresponding walls 4 and 5 of the support structure. The support structure is for example a double-hulled ship or a building located on land. The walls of the tank include one or more sealing barriers 6 and one or more insulating barriers 7 to contain cold liquids such as LNG. As a safety measure, it is possible to provide an auxiliary sealing barrier, not shown, between the supporting structure and the sealing barrier 6, which is referred to herein as the main sealing barrier.

The tank 1 can be produced in different well-known geometries, for example the geometry of the prism in the hull of a ship or the cylindrical geometry on land.

Moreover, many methods are available for producing insulating and sealing barriers, for example, from prefabricated elements.

A rigid elongate member is shown which constitutes a pedestal 10 extending from the bottom wall 3 of the tank through the thermal barrier 7 and the sealing barrier 6 so that one end of the tank supports the bottom wall 5 of the support structure. And the other end is spaced apart from the sealing barrier 6 and protrudes into the tank. The pedestal 10 can, for example, support the equipment 9 immersed in a tank. For example, it may be arranged at the base of a pumping mast of a tank (not shown) to support a pump that is put down. Although the pedestal is shown here on the bottom of the tank, similar rigid members can be arranged in the same way at other places in the tank, for example as a support or spacing element for holding an object away from the tank wall. .

To form the sealing barrier 6, it is possible to use thin sheet metal plates characterized by corrugations that form elastic regions for absorbing heat shrinkage and static and dynamic pressure. Such sealed corrugated or wafer-like sheet metal barriers are described in particular in FR-A-1379651, FR-A-1376525, FR-A-2781557 and FR-A-2861060. This possibility is described in more detail below with reference to FIGS. 2 and 3.

Referring to FIG. 3, the sealing barrier 6 consists of a plurality of corrugated sealing plates 11 and it is intended that the inner surfaces of the plurality of corrugated sealing plates are in contact with the fluid. The sealing plates 11 are thin metal, for example stainless steel or aluminum, members and are welded to each other in the edge overlap region 12. Welding is, for example, an overlap welding type produced by the method described in detail in patent FR-A-1387955. The sealing plate 11 can be of various designs with respect to the shape and size of the sealing plate, and as a result the welding area can be variously positioned.

The sealing plate 11 has on its inner surface a first row of wrinkles, referred to as longitudinal wrinkles 15 and a second row of wrinkles, referred to as transverse wrinkles 16, each of which is perpendicular to each other. Do. The pleats 15 of the first row have a smaller height than the pleats 16 of the second row. Thus, the pleats 15 are discontinuous when the pleats cross over the pleats 16 at 18. The longitudinal pleats 15 and the transverse pleats 16 project toward the interior of the tank 1.

The pedestal 10 here has a circular cross section and has a truncated conical lower part 13 which is connected to the cylindrical upper part 14 at the smallest diameter end 17. The largest diameter base of the truncated conical portion 13 abuts against the wall 5 of the support structure. The truncated conical portion 13 extends through the thickness of the tank wall beyond the height of the sealing barrier 6. The cylindrical portion 14 is closed in a sealed manner by, for example, a circular plate 19 which can be welded to the inner rim, not shown, of the cylindrical portion 14.

To provide a passageway for the pedestal 10, the corrugated sealing plate 11 forming the sealing barrier 6 is cut in a manner that defines a square window 25 around the pedestal 10. In order to establish the continuity of the sealing barrier 6 at the height of the window 25, a sealed assembly of continuous portions is formed between the pedestal 10 and the sealing plate 11. When the diameter of the pedestal 10 is greater than the spacing between the pleats 15 in the first row, some of these longitudinal pleats, denoted 20 and the subline A of the corrugations that intersect the pedestal 10 Is interrupted by the window 25.

Similarly, because the diameter of the pedestal 10 is greater than the spacing between the corrugations 16 in the second row, the baseline B of some of the transverse creases marked 21 and the corrugations that intersect the pedestal 10. ) Is interrupted by a window around the pedestal.

Furthermore, as can be seen in FIG. 3, the window 25 is actually larger than the diameter of the pedestal 10, making it relatively easy to assemble the connecting portion. Thus, when formed in the corrugated sheet metal layer, the window 25 tends to break the corrugation in a similar manner and the subline of the corrugation is too close to the pedestal without actually crossing the pedestal, so that the placement of the connecting portion between the window and the pedestal Is not possible.

The center C of the pedestal 10 is located between the baselines A of the recessed pleats 20 and between the baselines B of the recessed pleats 21. To be more precise in the middle. As a result of this positioning, each baseline A or B intersects the pedestal 10 along a string shorter than the diameter of the pedestal 10. Because of this, and given the space that must exist between the edge of the window 25 and the pedestal 10 to allow for the placement of the connecting portion, this positioning of the pedestal is such that the transverse dimension of which the sub-line A or B is the largest. It is possible to stop each of the corrugations 20 and 21 over a shorter distance when crossing the pedestal along, i.e., the diameter in the case of a circular cross section. Given that such interruption reduces the local flexibility of the sealing barrier and thus facilitates local fatigue and its wear, it is possible to break the corrugation of the sealing barrier over the shortest possible distance.

In the case of a circular cross section, centering the pedestal in the middle between the interrupted corrugations and between the interrupted corrugations 21 provides the best results. However, other section shapes and other positions of the pedestal may also be considered. In each case, a principle that can serve to apply the positioning of the pedestal between the creases is to select a position that minimizes or at least reduces the transverse size of the pedestal that intersects the line of the broken crease. If the special geometry of the pedestal and / or the special distribution of the pleats of the membrane comprises different lengths of interruption of the plurality of pleats, the relevant optimal parameter for applying the position of the pedestal is the length of the longest break or the accumulation of the breaks. It may be a length.

In FIG. 3, the window 35 has a square shape that facilitates cutting the sealing plate 11 into the desired shape. However, other window shapes can also be used, especially depending on the geometry of the pedestal.

One embodiment of the tank wall in the region of the pedestal 10 is described in detail with reference to FIGS. 4 to 8 below. This embodiment is particularly suitable for a tank having a wall comprising two sealing barriers and two insulating barriers. The barrier 6 is thus referred to as the main thermal barrier. The pedestal 10 is only described in the vicinity, and the tank wall can be produced according to the idea of application FR-A-2781557.

4 shows a substantially square area of the tank wall and half of the section of the pedestal 10 around the pedestal in an intermediate assembly step. The right part is provided before placing the elements of the auxiliary sealing barrier and the main insulating barrier and the left part is provided after the placement of these elements.

To connect the pedestal to the auxiliary sealing barrier, the pedestal 10 is a very thin auxiliary insulating barrier 22 and a square auxiliary plate 23 fixed around the frustoconical portion 13 at a height corresponding to the top surface of the auxiliary sealing barrier. ). In order to connect the pedestal to the main sealing barrier, the pedestal 10 comprises a circular main plate 24 fixed around the truncated conical portion 13 at a height corresponding to the top surface of the main insulating barrier 26. Plates 23 and 24 may be manufactured integrally with pedestal 10.

Under the auxiliary plate 23, the auxiliary insulating barrier 22 also includes a glass-cotton packing 27 having a square outer contour. Under the main plate 24, the main insulating barrier 26 also includes a glass-cotton packing 28 having a circular outer contour.

The secondary insulation barrier, the secondary sealing barrier and the primary insulation barrier around the packing 27 and the plate 23 are produced by four corner panels, one of the four corner panels 30 being shown in the left part of FIG. Can be. The panel 30 is an L-shaped lower insulating block 31 constituting an element of the auxiliary insulating barrier 22, a sealable flexible coating 32 completely covering the L-shaped upper surface of the block 31. And a stepped L-shaped overall shape with a smaller L-shaped upper insulating block 33 constituting an element of the main insulating barrier 26. The upper block 33 is aligned with the outer sides of the lower block 31 and leaves the area of the sealing coating 32 located on the end rim and the outer rim of the bottom block 31 uncovered. Panel 30 may be made by attaching a material similar to the material disclosed in application FR-A-2781557, in particular polyurethane foam for thermal insulation barriers and aluminum foil / glass fiber composite materials for plywood and auxiliary sealing barriers. .

The inner sides of the four corner panels 30 are arranged next to the contours of the packing 27 and the plate 23. The size of the block 31 allows to create a space therebetween in the form of four radial chimneys 34 respectively positioned between the end faces of two adjacent lower blocks 31. To ensure continuity of the main thermal barrier 22, each chimney 34 is packed with a glass fiber film 35. The porosity of the glass fibers of the film 35 and the packing 27 allows the gas to circulate through the main thermal barrier barrier 22, in particular to inactivate the tank wall with nitrogen.

6 shows the manufacture of the secondary sealing barrier in the region of the pedestal 10 as can be seen from above. To form the continuity of the auxiliary sealing barrier around the pedestal 10, four strips 36 of the sealed aluminum foil and glass fiber composite material are attached to the sealing coating 32 of the auxiliary plate 27 and the panel 30. Sticks. Each strip 36 is positioned to overlap the uncovered inner rim of the two lower blocks 31 and one side of the auxiliary plate 27. The strip 36 overlaps in the end region 37. To form the continuity of the secondary sealing barrier over the chimney 35, the four strips 38 of sealed aluminum film and the native fiber composite material overlap the rim at the edges of the two lower blocks 31 each time. Adheres to the sealable coating 32 of 30.

7 shows the same area of the tank wall after assembling the main thermal barrier. The main insulation barrier is completed by four corner blocks 40 and four intermediate blocks 41 between the pedestal 10 and the upper insulation block 33, each of which has an interior portion of the packing 28 and the main plate ( Support the round contour of 24). These blocks 40 and 41 are also shown in the left part of FIG. 4.

As can be seen in detail in FIG. 5, each upper surface of the intermediate block 41 has a rebate 44 defined by step 43. The rebate 44 is exactly at the height of the main plate 24 to provide a planar support surface to the metal closure plate 45 that provides the main sealing barrier around the pedestal 10.

As can be seen in FIG. 7, the two closure plates 45 are arranged around the main plate 24 and welded in a sealed manner to the main plate around the entire periphery of the closure plate. To this end, the inner edge 46 of the plate 45 is cut in a semicircular shape while the outer edge 47 of the plate 45 defines a square slightly larger than the window 25 in the corrugated sealing plate 11. do. The two closing plates overlap in the region 48 where the two closing plates 45 are welded to each other. The closing plates 45 are closed so that the closing plates 45 are firmly pressed against such a block because the closing plates 45 must be prevented from lifting, especially when the closing plates are welded to the main plate 24. It is secured to the blocks 40 and 41 of the main thermal barrier by means of wood screws or rivets 49 arranged near the outer edges 47 of the plates.

2 and 3, in the area of the pedestal 10 the main sealing barrier 6 is on the one hand welded to the closing plate 45 by the edge of the sealing plate 11 defining the window 25. By closing the end pieces 50 and the ends of the pleats 20 and 21 which are interrupted in a sealed manner. The sealing plate 11 overlaps the boundary of the closing plate 45 including the screw 49.

8 shows one embodiment of the end piece 50. The end piece 50 is sealed at the ends of the base plate and the pleats 20 or 21 at two parts 51 and 52 which are intended to be sealedly welded to the closing plate 45 and the sealing plate 11 respectively. A cell 54 intended to be welded. The step 53 between the portions 51 and 52 of the base plate has a size substantially equal to the thickness of the sealing plate 11.

The manner of cutting the insulating block and other prefabricated components shown in FIGS. 2, 4, 6, and 7 to constitute an auxiliary insulating barrier, an auxiliary sealing barrier, and a primary insulating barrier is purely exemplary. Similar components can be cut and prefabricated into other shapes so that the tank wall assembly includes more or fewer components. In another corresponding embodiment, the four L-shaped edge panels 30 are replaced by a single panel having the shape of two U-shaped panels or square frames.

As better shown in FIG. 3, the pedestal contemplated above requires a window about twice the size of the spacing 55 between the two pleats 15 or 16, equidistant here. To this end, two folds of each row are interrupted. However, this arrangement of the pedestal and the tank wall near the pedestal can be applied to other pedestal dimensions. For example, for wider pedestals, the corresponding window may interrupt a larger number of one or each row of wrinkles, for example three or four wrinkles or more than five wrinkles. Moreover, it is possible to locally route some pleats to limit the number of pleats that are interrupted to maintain the high height elasticity of the sealing membrane. This possibility is illustrated by the FIG. 9 embodiment.

In FIG. 9, components that are the same as or similar to those of FIG. 3 have the same reference numerals increased by 100. The transverse size of the pedestal 110 is larger, for example greater than or about three times the spacing 155 between the corrugations 115 or 116, in which case for the pedestal 110 to pass through. A window 125 formed in the corrugated metal membrane interrupts the perimeter of the four corrugations in each row. However, instead of stopping four folds in each row, this embodiment stops two folds 120, or 121 in each row as in the previous embodiment, while the other in each row Two creases 158, or 159 are locally offset from pedestal 110 with respect to their original subline, but are not interrupted.

For this purpose, the sealing barrier 106 is deformed at the height of the two concentric square windows 125 and 160. Outside the window 160, the sealing barrier 106 consists of a sealing plate 111 that supports the longitudinal corrugations 115 and the hinge corrugations 116 distributed equidistantly. The sealing barrier 106 between the window 160 and the window 125 is different from the other corrugated sealing plate, ie here the two overall C-shaped plates 161 which support the less spaced corrugations. Associated. The corrugations of the plates 161 constitute a central segment 162, or 163, offset from the pedestal 110, in particular for each of the corrugations 158, or 159. Finally, at the height of the window 125 and the structure of the window-inside sealing barrier 106 is similar to the FIG. 3 embodiment.

The bend component 170 is adapted to form a junction in the window 160 between the central segment 162 or 163 of the corrugation 158 or 159 and the portion of the corrugation located outside the window 160.

10 shows one embodiment of the bend component 170. The bend component 170 is two portions 171 which are intended to be hermetically welded to each plate 111 or 161 of the sealing barrier 106 and to the adjacent bent portion 170 and the bent corrugations 174. And a base plate within 172, wherein the baseline of the bent corrugation 170 defines a selected angle, for example 135 °. The bent pleats 174 are intended to be sealingly connected to adjacent ends of the pleats 158 or 159 and to the bent pleats of adjacent bend portions. Step 173 between portions 171 and 172 of the base plate has a size substantially the same as the thickness of the sheet metal, from which the sealing plate 111 or 161 or bend plate 170 is made. . Sheet metal of the same thickness is preferably used for these various parts.

In other embodiments suitable for smaller diameter pedestals, not shown, for example, all of the corrugations where the baseline is interrupted by the window, for example two corrugations in each row, as in FIG. Similar to 158 and 159, it extends across the window according to the offset routing. In this embodiment, the flexibility of the membrane can be improved because the pleats are not interrupted by the end pieces at the height of the pedestal.

In the embodiment described above, the main sealing barrier is formed of a sheet metal comprising two rows of mutually perpendicular corrugations. However, other types of corrugated metal membranes may be applied in a manner similar to fewer or more corrugations and / or corrugations of different arrangements.

Although the invention has been described in connection with a plurality of specific embodiments, it is clear that the invention is not limited to the plurality of specific embodiments, and includes all technical equivalents of the described means and combinations thereof within the scope of the invention. do.

The use of the verb include or comprise and their utilization forms does not exclude the presence of other elements or other steps than those described in the claims. Unless otherwise indicated, the use of an indefinite article “a” or “an” for an element or step does not exclude the presence of a plurality of such elements or steps. Plural means or modules may be provided by the same hardware element.

In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim.

Claims (18)

A sealed and insulated tank disposed within a support structure,
The tank comprises a tank wall 3 disposed along the support structure 4,
The tank wall is:
Sealing barriers (6, 106),
An insulating barrier 7, 22, 26 disposed between the sealing barrier and the support structure and having a support surface for the sealing barrier, and
And equipment pedestals 10 and 110 immersed in the sealed tank,
The sealing barrier comprises layers 11, 111 of corrugated sheet metal having at least one row of parallel corrugations 15; 115, wherein the layer of corrugated sheet metal comprises windows 25, 125 around the pedestal. Interrupted by)
The pedestal extends longitudinally through the window in the layer of corrugated sheet metal and protrudes into the tank to support the equipment away from the sheet metal layer and the first end portion abutting against the support structure. Has a second end portion,
The sealing barrier comprises connecting portions 24, 45, 50 arranged in a window around the pedestal to sealingly connect the pedestal to an edge portion of the layer of corrugated sheet metal defining the window;
The windows 25 and 125 stop at least one row of the plurality of parallel pleats 20, 120, 158 and the pedestal is a base line of the plurality of two parallel pleats 20, 120. A) centered on the position settled between,
Sealed and Insulated Tank.
The method according to claim 1,
The pedestal has one or more convex sides 13,
Between which the subline of the two corrugations 20, 120 centering the pedestal intersects the convex side of the pedestal,
Sealed and Insulated Tank.
3. The method according to claim 1 or 2,
The window interrupts an even quasi line A of at least one row of parallel lines,
Sealed and Insulated Tank.
The method of claim 3, wherein
The window interrupts the subline of the two parallel corrugations in the at least one row,
Sealed and Insulated Tank.
5. The method according to any one of claims 1 to 4,
The pedestal is substantially centered in the center of the subline of the two corrugations,
Sealed and Insulated Tank.
6. The method according to any one of claims 1 to 5,
The pedestal has a circular cross section,
Sealed and Insulated Tank.
7. The method according to any one of claims 1 to 6,
The at least one row of parallel wrinkles (15, 115) are distributed equidistantly,
Sealed and Insulated Tank.
The method according to any one of claims 1 to 7,
The pleats 15; 115 project on the side of the inner surface of the sealing barrier intended to be in contact with the fluid,
Sealed and Insulated Tank.
9. The method according to any one of claims 1 to 8,
The connecting portions are arranged in a plurality of end portions 50, 150 spaced apart from the pedestal in such a manner as to bring the pedestal between them to the distal ends of the two corrugations 20, 120 centered therebetween. ),
Sealed and Insulated Tank.
10. The method according to any one of claims 1 to 9,
The pedestal generally comprises a tubular shaped hollow envelope 13, 14 and a transverse closure wall 19, wherein the longitudinal axis of the hollow envelope is substantially perpendicular to the tank wall and the transverse closure. A wall closes the envelope in a sealed manner to form continuity of the sealing barrier at the height of the pedestal,
Sealed and Insulated Tank.
11. The method according to any one of claims 1 to 10,
The connecting portion comprises an annular plate 24 connected to the peripheral wall of the pedestal at the height of the layers 11, 111 of corrugated sheet metal,
Sealed and Insulated Tank.
12. The method according to any one of claims 1 to 11,
The connecting portion has an intermediate plate 45, 145 having a first edge welded to the annular plate and a second edge welded to an edge portion of the corrugated sheet metal layer 11, 161 defining the window. Included,
Sealed and Insulated Tank.
13. The method according to any one of claims 1 to 12,
The insulation barrier comprises a primary insulation barrier 26 disposed on the side of the sealing barrier 6, referred to as a primary insulation barrier, and an auxiliary insulation barrier 22 disposed on the side of the support structure, The tank wall comprises auxiliary sealing barriers 23, 32, 36, 38 disposed between the main and auxiliary insulating barriers, the auxiliary sealing barriers being connected in a sealed manner to the peripheral wall 13 of the pedestal,
Sealed and Insulated Tank.
14. The method according to any one of claims 1 to 13,
The connecting portion is:
A pleat 162 disposed on a line that is parallel to at least one row of parallel pleats 115 and laterally offset from the pedestal with respect to one of the sublines interrupted by the window, and the pleats of the connecting plate The two bend portions, including a connecting plate 161 having a bend portion 170 connecting the one end of the portion to one end portion of the crease portion 158 and the subline of the crease portion being interrupted by the window. And the pleats 162 of the connecting plate extend the pleats 158 and are interrupted in such a way that the ridges of the pleats are sealed across the window along a line that is laterally offset from the pedestal 110. ,
Sealed and Insulated Tank.
15. The method according to any one of claims 1 to 14,
The corrugated sheet metal layer comprises parallel corrugations 15, 115 in the first row and parallel corrugations 16, 116 in the second row that intersect the parallel corrugations in the first row at the intersections. The window interrupts the sublines of the parallel folds of the first plurality of first rows and / or the sublines of the parallel folds of the second plurality of second rows, and the pedestal is a subline of the first plurality of two parallel folds. Centered at a position located between A) and / or between the sublines B of the second plurality of two parallel corrugations,
Sealed and Insulated Tank.
The method of claim 15,
Parallel folds of the first row are perpendicular to parallel folds of the second row,
Sealed and Insulated Tank.
17. The method according to claim 15 or 16,
The windows 25, 125 are quadrilateral having two sides parallel to the pleats of the first row and two sides parallel to the pleats of the second row,
Sealed and Insulated Tank.
18. The method according to any one of claims 1 to 17,
The pedestal 10, 110 is disposed on the base of the mast for laying down the tank,
Sealed and Insulated Tank.

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