JP2013528541A - Sealed and insulated tank with pedestal - Google Patents

Abstract

The tank wall comprises a sealing barrier (6) and a pedestal (10) for equipment immersed in the sealed tank. The sealing barrier has a corrugated metal sheet layer with at least a series of parallel corrugations (15), which corrugated metal sheet layer is interrupted by a window (25) around the pedestal. The pedestal extends vertically through the window. The sealing barrier includes connecting portions (45, 50) that connect the pedestal to the edge of the corrugated metal sheet layer that partitions the window in a sealing manner. The window (25) interrupts a quasi-line extending from a plurality of parallel undulations, and the pedestal is located in the center between the two lines of quasi-lines (20) extending in parallel.
[Selection] Figure 3

Description

  The present invention relates to the field of the structure of a sealed and insulated tank provided in a support structure, and more particularly to the structure of a tank wall that needs to accept a pedestal.

  Sealed and insulated tanks are used in various industries to store hot or cold products. For example, in the energy field, liquefied natural gas (LNG) is stored at about -163 ° C. at atmospheric pressure in storage tanks on the ground or on floating structures. Such floating structures include methane tankers for transporting products, and offshore facilities for storing, liquefying, and regasifying products, especially known as FPSO and FSRU. and so on.

  In thin film containers, corrugated metal sheet layers are used to create sealing barriers that are also sufficiently resilient to resist static and dynamic pressures, eg, due to load movement and / or temperature changes. However, such sealing barriers and the underlying thermal insulating material are relatively fragile and do not necessarily support heavy equipment submerged in the bottom of the tank, such as a pump.

In one embodiment, the present invention is a sealed and insulated tank provided in the support structure having a tank wall provided along the support structure,
The tank wall is
A sealing barrier;
A thermal insulation barrier provided between the sealing barrier and the support structure and having a support surface for the sealing barrier;
A pedestal for equipment immersed in the tank,
The sealing barrier comprises a corrugated metal sheet layer having at least a series of parallel corrugations interrupted by a window around the pedestal;
The pedestal extends longitudinally through the window in the corrugated metal sheet layer, extends in the vertical direction, contacts the support structure, and protrudes into the tank to be spaced from the metal sheet layer. A second end for supporting the equipment;
The sealing barrier is provided in a window around the pedestal and includes a connecting portion that connects the pedestal to an edge of the corrugated metal sheet layer that divides the window in a sealing manner;
The window interrupts a quasi-line extending from the at least a series of parallel corrugations, and the pedestal is located in the center between two rows of parallel corrugation quasi-lines. To do.

  In other advantageous embodiments, this type of tank has one or more of the following characteristics:

  The pedestal can take various shapes depending on the features of the device to be supported. In one embodiment, the pedestal has at least one convex side surface, and two corrugated quasi-lines where the pedestal is located at the center intersect the convex side surface of the pedestal. In one embodiment, the pedestal has a circular cross section.

  In one embodiment, the window interrupts the at least series of even-numbered parallel corrugated quasilines, for example, interrupts the at least series of two parallel corrugated quasilines.

  In one embodiment, the pedestal is positioned approximately at the center of two corrugated quasilines. Alternatively, the pedestal can be offset from the center so that it is closer to one corrugation than the other, eg, in such a position, the corrugated shielding length that gives the shape of the pedestal is reduced. It becomes possible.

  In one embodiment, the at least series of parallel corrugations are arranged equidistantly. Alternatively, the series of corrugations can be arranged more irregularly, at least locally.

  In one embodiment, the corrugation protruding from the side surface of the inner surface of the sealing barrier is intended to contact a fluid.

  In one embodiment, the connecting portion includes a plurality of end portions provided at a distance from the pedestal, and the end portions are provided at two corrugated interrupted end portions around the pedestal. Adjacent to each other. The end of such a connection allows the corrugation interrupted by the window to re-establish the continuity of the sealing barrier.

  In one embodiment, the pedestal has a generally cylindrical hollow container whose longitudinal axis is substantially perpendicular to the tank wall, and the container is shielded in a sealed manner to increase the continuity of the sealing barrier. A transverse shielding wall that forms up to the level of the pedestal. Such a hollow shape is particularly preferred to limit the effective cross-sectional area of the pedestal imposed to create a heat escape path.

  The connection part intended to connect the pedestal and the edge of the corrugated metal sheet layer in a sealing manner can take various shapes.

  In one embodiment, the connecting part comprises an annular plate (24) joined to the peripheral wall of the pedestal at the level of the corrugated metal sheet layer (11, 111). Such a plate can be assembled in advance on the pedestal.

  In one embodiment, the connecting portion has a first edge welded to the annular plate, and a second edge welded to the edge of the corrugated metal sheet layer separating the window. An intermediate plate is provided.

  Such a tank can have a single sealing barrier or a plurality of successive sealing barriers, for example for reliability or safety reasons. In one corresponding embodiment, the thermal insulation barrier includes a first thermal insulation barrier provided on the side of the sealing barrier, referred to as a first sealing barrier, and a first provided on the side of the support structure. Two thermal insulation barriers, wherein the tank wall comprises a second sealing barrier provided between the first and second thermal insulation barriers, and the second sealing barrier is sealed in the periphery of the pedestal Combined with the wall.

  In one embodiment, the connection is provided on a line that is parallel to the at least series of parallel corrugations and laterally offset from the pedestal with respect to one of the quasilines interrupted by the window. A connecting plate having a corrugated shape, and a bent portion provided so that one end of the corrugated shape of the connecting plate is coupled to an end portion of the corrugated shape, and the quasi-line is interrupted by the window. The corrugation of the connection plate and the two bent portions are provided so as to extend the corrugation whose quasi-line is interrupted by the window in a sealing manner along a line offset laterally from the pedestal. It has been. The generation of one or more offset corrugations in this way makes it possible to limit the number of corrugations disrupted by the pedestal, and therefore even if it is necessary to adapt a pedestal having a relatively large diameter. It becomes possible to keep the elasticity of the sealing barrier.

  The conditions and features described above for a series of parallel corrugations can be applied to a series of parallel corrugations having different directions if necessary. In one corresponding embodiment, the corrugated metal sheet layer comprises a first series of parallel corrugations and a second series of parallel corrugations intersecting the first series of parallel corrugations. A first plurality of quasilines of the first series of parallel undulations and / or a second plurality of quasilines of the second series of parallel undulations. And the pedestal is between two parallel corrugated quasilines of the first plurality and / or between two parallel corrugated quasilines of the second plurality. Located in the center of.

  In a preferred embodiment, the first series of parallel waveforms is orthogonal to the second series of parallel waveforms. Therefore, the elasticity of the sealing thin film facing different directions is balanced.

  The above-mentioned window can take various shapes depending on the shape of the base and / or the shape of the constituent members of the corrugated metal sheet layer. In one embodiment, the window is a quadrilateral, for example, a rectangle, having two sides parallel to the first series of parallel corrugations and two sides parallel to the second series of parallel corrugations. , Square or parallelogram.

  In one embodiment, the pedestal is provided at the base of the mast for discharging fluid from the tank, for example to support a pump.

  One basic idea of the present invention is to support a device submerged in a tank on a pedestal that directly or indirectly abuts the support structure, thereby preventing forces acting on the relatively brittle corrugated sealing membrane. Or to limit. Another basic idea of the present invention is to provide the pedestal in such a way that it does not affect the essential mechanical properties of the wave-type sealing film, especially the sealing effect and resistance to thermal shrinkage and pressure. . Some aspects of the present invention provide for the elasticity of the thin film resulting from such shielding by interrupting the corrugation of the corrugated encapsulating thin film in the region through which the pedestal penetrates, and limiting the length of this interrupted region. It begins with the idea of providing this pedestal in a position where it is possible to limit the force drop. Another aspect of the invention begins with the idea of providing a corrugation locally to avoid a region through which the pedestal penetrates without interrupting the corrugation.

  The invention will be better understood, and the objects, details, features and advantages of the invention will be better understood through the following specific embodiments, given by way of illustration and not by way of limitation, with reference to the accompanying drawings, in which: It will become clearer.

FIG. 1 is a partial cross-sectional schematic view of a sealed and insulated tank according to an embodiment of the present invention. 2 is a perspective view of the pedestal and tank wall structure used in FIG. 1 having a cross section taken along line II-II in FIG. FIG. 3 is a top view of the pedestal shown in FIG. 2 and a tank wall region around the pedestal. FIG. 4 is a view similar to FIG. 2 at an intermediate stage of assembling the tank wall. FIG. 5 is an enlarged detailed view of the region V in FIG. 6 is a top view of the tank wall region of FIG. 4 illustrating the generation of a secondary sealing barrier. FIG. 7 is a view similar to FIG. 6 showing the intermediate stage of assembling the primary sealing barrier. FIG. 8 is a perspective view of a terminal piece used for generating the primary sealing barrier. FIG. 9 is a view similar to FIG. 3 illustrating the primary sealing barrier around the pedestal in another embodiment of the present invention. FIG. 10 is a perspective view of a bent portion used for generating the primary sealing barrier shown in FIG.

  FIG. 1 shows a part of a sealed and thermally insulated tank 1 consisting of tank walls 2, 3 fixed to the inner surface of corresponding walls 4, 5 of the support structure. The support structure is, for example, a double hull inner shell or a structure installed on the ground. In order to contain a cold liquid, for example liquefied natural gas (LNG), the tank wall of the tank is provided with at least one sealing barrier 6 and at least one thermal insulation barrier 7. For safety, a secondary sealing barrier (not shown) can also be provided between the support structure and the sealing barrier 6, in this case called the primary sealing barrier.

  The tank 1 can be manufactured using different known geometric shapes, for example, a prismatic geometric shape for a ship shell, a cylindrical geometric shape for a ground facility, or the like. . Various methods can be used to form the thermal insulation barrier and the sealing barrier, such as a prefabricated member.

  On the bottom wall 3 of the tank, a rigid elongated member constituting the pedestal 10 can be seen. The pedestal 10 extends through the thermal insulating barrier 7 and the sealing barrier 6, one end is supported by the bottom wall 5 of the support structure, and the other end is spaced from the sealing barrier 6 to the inside of the tank. It protrudes. The pedestal 10 supports a facility 9 that can be submerged in a tank, for example. In order to support the drainage pump, for example, the pedestal 10 is provided at the base of a pumping mast of a tank (not shown). Here, the pedestal 10 is shown on the bottom wall 10 of the tank, but a similar rigid member can be used in the same manner as other members of the tank, for example, as a support member or a separation member for holding an object at a distance from the tank wall. It can also be provided at a location.

  In order to form the sealing barrier 6, a thin sheet metal plate having a corrugation that forms an elastic region for absorbing heat shrinkage and static and dynamic pressure can be used. Such sealing corrugated or wafer-like sheet metal barriers are described in particular in FA-A-1379651, FA-A-1376525, FA-A-2781557 and FA-A-2861060. This feasibility is described in detail below with reference to FIGS.

  Referring to FIG. 3, the sealing barrier 6 includes a plurality of corrugated sealing plates 11 having an inner surface that is provided to contact the liquid. The corrugated sealing plate 11 is a member made of a thin metal (for example, stainless steel or aluminum), and is welded to each other at an edge overlapping region 12. The weld location is formed by lap welding with a method described in detail in, for example, Patent Document FA-A-1387955. The corrugated sealing plate 11 can take various designs with respect to its shape and dimensions, and as a result, the welding region is located at various locations.

  The corrugated sealing plate 11 has on its inner surface a first series of corrugations 15 referred to as longitudinal corrugations and a second series of corrugations 16 referred to as transverse lateral corrugations, respectively. These directions are orthogonal to each other. The height of the first series of corrugations 15 is lower than that of the second series of corrugations 16. Thus, the first series of corrugations 15 are separated at the intersection 18 with the second series of corrugations 16, while the second series of corrugations 16 are continuous. The longitudinal wave pattern 15 and the transverse wave pattern 16 protrude toward the inside of the tank 1.

  Here, the pedestal 10 has a frustoconical lower portion 13 having a circular cross section and an end portion 17 having the smallest radius coupled to the cylindrical upper portion 14. The base of the maximum radius of the frustoconical lower part 13 is supported by the wall 5 of the support structure. The frustoconical lower portion 13 extends beyond the height level of the sealing barrier 6 and penetrates the thickness direction of the tank wall. The cylindrical upper portion 14 is closed in a sealing manner by a circular plate 19 welded to, for example, an inner rim (not shown) of the cylindrical upper portion 14.

  In order to provide a passage inside the pedestal 10, the corrugated sealing plate 11 forming the sealing barrier 6 is cut so as to be interrupted by a square window 25 around the pedestal 10. In order to establish the continuity of the sealing barrier 6 at the height level of the window 25, a sealed assembly of connections is formed between the pedestal 10 and the corrugated sealing plate 11. Since the diameter of the pedestal 10 is larger than the interval between the first series of corrugations 15, the vertical corrugation indicated by reference numeral 20 and the quasi-line A that intersects the pedestal 10 are interrupted by the window 25. Similarly, since the diameter of the pedestal 10 is larger than the interval between the second series of corrugations 16, the quasi-line B intersecting the pedestal 10 with the corrugation in the transverse direction indicated by reference numeral 21 is a window around the pedestal 10. 25 is interrupted.

  In addition, as can be seen from FIG. 3, the window 25 is actually larger than the diameter of the pedestal 10, and it is relatively easy to adapt the connecting portion. Therefore, if formed with a corrugated metal sheet layer, the window 25 can be interrupted so that the corrugation and the quasi-line are not too close to the pedestal 10 without actually intersecting the pedestal 10, and the connecting portion can be 10 can be provided.

  The center C of the pedestal 10 is located between the quasi-line A of the interrupted waveform 20 and between the quasi-lines B of the interrupted waveform 21, more precisely these in FIG. Located in the center between quasi-lines. As a result of this position setting, each quasi-line A or B intersects the pedestal 10 along a chord line shorter than the diameter of the pedestal 10. For this reason, by providing a space in which the connection portion can be provided between the edge of the window 25 and the pedestal 10, the position setting of the pedestal 10 is such that the quasi-line A or B has its maximum lateral dimension. That is, it is possible to interrupt each of the corrugations 20 and 21 at a shorter distance than when intersecting along the diameter of the circular cross section. Considering that these interruptions reduce the elasticity of the local sealing barrier and thus promote local exhaustion and wear, it is advantageous to interrupt the wave form of the sealing barrier as short as possible. To work.

  In the case of a circular cross section, optimal results can be obtained by placing the middle part of the pedestal between the interrupted corrugations 20 and in the middle between the interrupted corrugations 21. However, the case of other cross-sectional shapes or the case where the pedestal is set at another position can be considered. The principle that is adapted when providing a pedestal at a location between corrugations is to select a location that minimizes or at least reduces the lateral dimension of the pedestal that intersects the interrupted corrugated quasi-line. If the specific geometry of the pedestal and / or the specific arrangement of the corrugations of the thin film is to block multiple corrugations at different lengths, the appropriate optimization parameters for the position of the pedestal are: The longest blocking length or the cumulative length of blocking.

  In FIG. 3, the window 25 has a square shape, which makes it easy to cut the corrugated sealing plate 11 into a required shape. However, other window shapes can also be used, particularly depending on the geometry of the pedestal.

  One embodiment of the tank wall in the region of the pedestal 10 will be described in detail below with reference to FIGS. This embodiment is particularly suitable for tank walls with two sealing barriers and two thermally insulating barriers. Therefore, the sealing barrier 6 is referred to herein as a first sealing barrier. Although described only in the vicinity of the pedestal 10, the tank wall can be formed in accordance with the teachings of patent application FR-A-2781557.

  FIG. 4 is a half sectional view of the pedestal 10 and a tank wall around the pedestal 10 at an intermediate assembly stage in a substantially square region. The right part represents a state before the members of the second sealing barrier and the first insulating barrier are arranged, and the left part represents a state after these members are arranged.

  In order to connect the pedestal 10 and the second sealing barrier, the pedestal 10 is fixed around the frustoconical lower part 13 at a height corresponding to the upper surface of the second insulating barrier 22 and a very thin secondary sealing barrier. A square second plate 23 is provided. In order to connect the base 10 and the first sealing barrier, a round first plate 24 fixed around the frustoconical lower portion 13 at a height corresponding to the upper surface of the first thermal insulation barrier 26 is provided. The second and first plates 23 and 24 are formed integrally with the base 10.

  Below the second plate, the second insulating barrier 22 is provided with a glass wool packing material 27 which also has a square outer contour. Below the first plate, the first thermal insulation barrier 26 is provided with a glass wool packing material 28 which also has a circular outer contour.

  The glass wool packing material 27, the second insulating barrier around the second plate 23, the second sealing barrier, and the first insulating barrier are formed by four corner panels, one of which (30) is illustrated. The right side of FIG. The panel 30 is generally L-shaped with a step, and is a sealing that completely covers the L-shaped lower insulating block 31 that is a component of the second insulating barrier 22 and the L-shaped upper surface of the lower insulating block 31. An elastic coating 32 and a smaller L-shaped upper insulating block 33 which is a constituent member of the first thermal insulation barrier 26 are provided. The upper insulating block 33 is aligned with the outer side surface of the lower insulating block 31 to leave areas where the sealing elastic coating 32 is not covered on the inner edge and the edge of the lower insulating block 31. Panel 30 can be prefabricated with an adhesive material similar to that taught in patent application FA-A-2781557, in particular polyurethane foam or plywood for the insulation barrier, and second sealing barrier. A composite material of aluminum foil and glass fiber is used.

  The inner side surfaces of the four corner panels 30 are provided on the side surfaces of the outline of the glass wool packing material 27 and the second plate 23. The size of the lower insulating block 31 is a shape of four radially extending longitudinal chimneys 34 positioned between two adjacent lower insulating blocks 31 so as to form a space between them. It is. In order to form the continuity of the second insulating barrier 22, each vertical tear 34 is filled with a glass fiber film 35. The porosity of the glass fiber film 35 and the glass wool packing material 27 allows the gas to circulate through the second insulating barrier 22 and, in particular, helps to deactivate the tank wall using nitrogen. Yes.

  FIG. 6 shows a method for generating a second sealing barrier in the region of the pedestal 10 shown above. In order to ensure the continuity of the second sealing barrier around the pedestal 10, a strip 36 made of a composite material of sealed aluminum foil and glass fiber is sealed with the second plate 23 of the panel 30. Affixed to the static elastic coating 32. Each piece 36 is positioned so as to overlap with one side surface of the second plate 23 and the uncovered inner edges of the two lower insulating blocks 31. These pieces 36 overlap the terminal area 37. To form the continuity of the second sealing barrier above the vertical tear 34, a four piece 38 of a sealed aluminum foil and glass fiber composite is applied to the sealing elastic coating 32 of the panel 30. Are attached to the edges of the two lower insulating blocks 31, respectively.

  FIG. 7 represents the same region of the tank wall after providing the first insulating barrier. The first insulating barrier is finished by four corner blocks 40 and four intermediate blocks 41 between the upper insulating block 33 and the pedestal 10, and the inner side surfaces of the first insulating barrier are the first plate 24 and the glass wool packing material 28. Supports round corners. These blocks 40, 41 are also represented on the left side of FIG.

  As shown in the detailed view of FIG. 5, the upper surface of each intermediate block 41 has a groove 44 that is separated by a step 43. The groove 44 matches the level of the height of the first plate and provides a flat support surface for the metal shielding plate 45 that provides a first sealing barrier around the pedestal 10.

  As shown in FIG. 7, the two shielding plates 45 are provided around the first plate 24 and are welded over the entire circumference in a sealed manner. In order to achieve this, the inner end 46 of the shielding plate 45 is cut into a semicircle, and the outer end 47 has a square shape slightly larger than the window 25 of the corrugated sealing plate 11. The two shielding plates 45 overlap in the region 48 and are welded together. The shield plate 45 is firmly attached to the blocks 40 and 41 of the first sealing barrier by wood screws or rivets 49 provided in the vicinity of the outer end 47 so that the shield plate 45 does not float when the shield plate 45 is welded to the first plate 24. The blocks 40 and 41 are fixed so as to be pressed.

  2 and 3, the first sealing barrier 6 in the region around the pedestal 10 is welded with the shielding plate 45 on the one hand and the edge of the corrugated sealing plate 11 that delimits the window 25 and is interrupted on the other side. It is completed by closing the end portions of the corrugations 20 and 21 in a sealing manner with the terminal piece 50. The corrugated sealing plate 11 is cut so as to overlap the boundary of the shielding plate 45 including the screw 49.

  FIG. 8 shows one embodiment of the terminal piece 50. The terminal piece 50 is sealed with a substrate composed of two parts 51 and 52 intended to be welded to the shielding plate 45 and the corrugated sealing plate 11 respectively in a sealing manner, and the end of the corrugated 20 or 21. And a shell 54 intended to be welded in this manner. A step 53 between the substrate portions 51 and 52 is approximately equal to the thickness of the corrugated sealing plate 11.

  The method of cutting the insulating block shown in FIGS. 2, 4, 6, and 7 and other components made of other prefabs to form the second insulating barrier, the second sealing barrier, and the first insulating barrier, It is purely illustrative. Similar components can be cut to other shapes or prefabricated to make the tank wall assembly with a larger or smaller number of components. In another corresponding embodiment, the four L-shaped corner panels are replaced with two U-shaped panels or a square frame-like single panel.

  As well shown in FIG. 3, the above-described pedestal now requires a window about twice as large as the space 55 between two equidistant corrugations 15 or 16. To achieve this goal, the two corrugations in each row are interrupted by the window. However, the arrangement of the pedestal and the tank wall in the vicinity thereof can accommodate other pedestal dimensions. For example, for a wider pedestal, the corresponding window will interrupt more corrugations in each row, for example, 3 or 4 or more corrugations. In addition, by limiting the number of corrugations to be interrupted, some corrugations can be bypassed locally in order to maintain high elasticity of the sealing thin film. This possibility is illustrated in the embodiment of FIG.

  In FIG. 9, the same or similar components as in FIG. The lateral dimension of the pedestal 110 is larger, for example, equal to or greater than about three times the space 155 between the corrugations 115 or 116 and formed in the corrugated metal film to penetrate the pedestal 110. The window made in this case cuts into the four corrugated quasilines in each row. However, instead of interrupting the four waveforms in each row, in this embodiment, each of the series of two waveforms 120, 121 is interrupted and the other series of two waveforms 158, 159 are locally localized. The line is offset from the pedestal 110 so that it is not interrupted.

  To achieve this goal, the sealing barrier 106 has been deformed at two concentric square windows 125,160. Outside the window 160, the sealing barrier 106 is composed of a sealing plate 111 having a vertical corrugation 115 and a lateral corrugation 116 arranged at equal intervals. Between the window 160 and the window 123, the sealing barrier 106 is connected to another corrugated sealing plate, here two generally U-shaped plates 161, where the corrugations are spaced at different intervals. In other words, the gaps are arranged with a small interval. The corrugation of the plate 161 is composed of segments 162 and 163 from the center offset from the pedestal 110 with respect to the corrugations 158 and 159, respectively. Finally, the height level of the window 125 and the structure of the sealing barrier 106 inside thereof are the same as in the embodiment of FIG.

  A bent portion 170 is used to connect the segment 162 or 163 from the center inside the window 160 to the corrugated portion 158 or 159 provided outside the window 160.

  FIG. 10 shows one embodiment of the bend 170. The bend 170 is a substrate composed of two portions 171, 172 intended to be welded to the respective plates 111, 116 of the sealing barrier 106 and the adjacent bend 170 in a sealing manner, and its quasi-line And a bending wave mold 174 forming a selected angle, for example, 135 degrees. The bending wave pattern 174 is intended to be connected to the adjacent end of the wave pattern 158 or 159 in a sealed manner and to be connected to the bending wave pattern 174 of the adjacent bending part 170. The size of the step 173 between the substrate portions 171 and 172 is substantially equal to the thickness of the metal plate used to make the sealing plate 111 or 161 or the bent portion 170. The same thickness metal plate is preferably used for these various components.

  In another embodiment not shown, all corrugated quasilines, for example suitable for smaller diameter pedestals, are interrupted by a window, for example two corrugations in each series as in FIG. It is offset so that it crosses the window like 9 corrugations 158 and 159 and detours. In this embodiment, since no corrugation is interrupted by the terminal piece at the level of the pedestal, the elasticity of the thin film is improved.

  In the above embodiment, the first sealing barrier is made of a metal plate having two corrugations perpendicular to each other. However, other types of corrugated metal films can also be used for similar methods with fewer or more corrugations and / or different configurations of corrugations.

  While the invention has been described in terms of several specific embodiments, it is not limited thereto and the technical equivalents and combinations of these means are within the scope of the invention. it is obvious.

  The use of the verb to prepare and its use does not exclude the presence of other elements or steps other than those listed in the claims. Unless expressly stated, the use of the indefinite article “a” or “an” does not exclude the presence of a plurality of such elements or steps. Multiple means or modules can be represented 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 provided in the support structure (4) having a tank wall (3) provided along the support structure (4),
The tank wall is
A sealing barrier (6, 106);
A thermal insulation barrier (7, 22, 26) provided between the sealing barrier and the support structure and having a support surface for the sealing barrier;
A pedestal (10, 110) for equipment immersed in the tank,
The sealing barrier comprises a corrugated metal sheet layer having at least a series of parallel corrugations (15, 115) interrupted by a window (25) around the pedestal;
The pedestal extends longitudinally through the window in the corrugated metal sheet layer, extends in the vertical direction, contacts the support structure, and protrudes into the tank to be spaced from the metal sheet layer. A second end for supporting the equipment;
The sealing barrier includes a connection portion (24, 45, 50) provided on a window around the pedestal to connect the pedestal to an edge of the corrugated metal sheet layer that divides the window in a sealed manner,
The window (25, 125) interrupts a quasi-line extending from the at least a plurality of parallel corrugations (20, 120, 158), and the pedestal has two rows of corrugations (20, 120) extending in parallel. A tank characterized by being located in the center between the quasi-lines (A). The pedestal has at least one convex side surface (13);
2. The tank according to claim 1, wherein a quasi-line of two corrugations (20, 120) in which the pedestal is located at the center intersects the convex side surface of the pedestal.   The tank according to claim 1 or 2, wherein the window cuts into the quasi-line of the at least a series of even-numbered parallel lines.   4. The tank of claim 3, wherein the window interrupts the at least a series of two parallel corrugated quasilines.   The tank according to any one of claims 1 to 4, wherein the pedestal is positioned substantially at the center of two corrugated quasilines. The tank according to any one of claims 1 to 5, wherein the pedestal has a circular cross section.   A tank according to any one of the preceding claims, characterized in that the at least series of parallel corrugations (15, 115) are arranged equidistantly.  The tank according to any one of claims 1 to 7, characterized in that the corrugations (15, 115) protruding on the inner side surface of the sealing barrier are intended to come into contact with a fluid.   The connection portion includes a plurality of end portions (50, 150) provided at a distance from the pedestal, and the end portions are interrupted by two corrugations (20, 120) centered on the pedestal. The tank according to any one of claims 1 to 8, wherein the tank is provided so as to be adjacent to the end portion.   The pedestal has a generally cylindrical hollow container (13, 14) whose vertical axis is substantially perpendicular to the tank wall, and shields the container in a sealing manner to improve the continuity of the sealing barrier. 10. A tank according to any one of the preceding claims, characterized in that it comprises a transverse shielding wall (19) that forms up to the level of the pedestal.   The said connection part is equipped with the cyclic | annular board (24) joined with the peripheral wall of the said base at the height level of the said corrugated metal sheet layer (11, 111), Any one of Claim 1 thru | or 10 characterized by the above-mentioned. The tank according to claim 1.   An intermediate plate (45, 145) in which the connecting portion includes a first edge welded to the annular plate, and a second edge welded to the edge of the corrugated metal sheet layer separating the window. The tank according to any one of claims 1 to 11, further comprising: The thermal insulation barrier comprises a first thermal insulation barrier (26) provided on the side of the sealing barrier (6), referred to as a first sealing barrier, and a second heat provided on the side of the support structure. An insulating barrier (22),
The tank wall comprises a second sealing barrier (23, 32, 36, 38) provided between the first and second thermal insulation barriers;
13. A tank according to any one of the preceding claims, characterized in that the second sealing barrier is connected with the peripheral wall (13) of the pedestal in a sealing manner. The connection is parallel to the at least one series of parallel corrugations (115) and parallel provided on a line laterally offset from the pedestal with respect to one of the quasi-lines interrupted by the window. A connecting plate (161) having a corrugated shape (162), each connecting one end of the corrugated shape of the connecting plate with an end of the corrugated shape (158), so that the quasi-line is interrupted by the window A bent portion (170) provided in
The corrugation (162) of the connecting plate and the two bent portions offset the corrugation (158) whose quasi-line was interrupted in the window in a sealed manner from the pedestal (10) in the lateral direction. The tank according to any one of claims 1 to 13, wherein the tank is provided so as to extend along a line. The corrugated metal sheet layer includes a first series of parallel corrugations (15, 115) and a second series of parallel corrugations (16) intersecting the first series of parallel corrugations at intersections. 116), and
The window interrupts the first series of parallel corrugated first plurality of quasilines and / or the second series of parallel corrugated second plurality of quasilines;
The pedestal is located between two parallel corrugated quasilines (A) of the first plurality and / or two parallel corrugated quasilines (B) of the second plurality. The tank according to any one of claims 1 to 14, wherein the tank is located in the center between the two.   16. The tank of claim 15, wherein the first series of parallel corrugations is orthogonal to the second series of parallel corrugations.   The window (25, 125) is a quadrilateral having two sides parallel to the first series of parallel corrugations and two sides parallel to the second series of parallel corrugations. The tank according to claim 15 or 16, characterized in that   A tank according to any one of the preceding claims, characterized in that the pedestal (10, 100) is provided at the base of a mast for discharging fluid from the tank.

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