DK142611B - Ship tank for transporting gas in liquid state. - Google Patents

Abstract

Methane tanker comprises two heat insulating barriers and two fluid-tight barriers, positioned alternately with a fluid-tight barrier innermost and the outermost insulating barrier attached to the hull of the ship. The other fluid-tight barrier is positioned between the two insulating barriers and comprises vertical plates joined together by welding to horizontal metallic strips. One edge of each strip is slidably connected to the outer insulating barrier and the other edge is resiliently connected to the inner insulating barrier.

Description

(11) PUBLICATION 142611 DENMARK «« lnt.C, .J B S3 B 2S / 16 § (21) Application No. 4521/71 (22) filed on the 2nd ββρ. 1971 (24) Race day 2. ββρ. 1971 (44) The application presented and, Λ _ in the Qon petition offerrtliggioit on * **

DIRECTORATE OF

PATENT AND TRADEMARKET <30) requested from the _

17 sep. 1970 * 7053789, FR

Jul 21 1971, 7126652, FR

(71) GAZ TRANSPORT S.A.R.L., 45 Boulevard Haussmann, Paris 9erae, FR.

(72) InventorJ Michel Bourgeois, 8 Rue Eugene Delacroix, 76 - Le Havre, FR: Pierre Jean, no. "5, le Village, 76 - Fontaine la Mallet, FR.

(74) Plenipotentiary in the proceedings:

International Patent Office .____ (54) Ship tank for the transport of liquefied gas.

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a ship tank for the transport of gas in liquid state and of the type which is heat insulating, sealed, assembled and built into a ship's hull and comprises two successive sealing walls, namely a primary wall in contact with the product contained in the tank and a secondary sealing wall located between the primary wall and the hull, which walls alternate with two heat-insulating walls, the secondary heat-insulating wall being made up of boxes filled with a heat-insulating fabric and directly attached to the inner wall of the double-walled hull by means of threaded pins which are fixed connected to the hull, the secondary sealing wall being made up of metal cladding plates with edges away from the hull, and the height of which is approximately equal to the height of said boxes, which cladding boards have their folded edges welded to a metal plate which can slide relative to the underlying thermal insulation wall, while the primary thermal insulation wall is ka 2,22611 which is filled with heat insulating fabric and the primary sealing wall is constructed as said secondary sealing wall, wherein cladding plates for the primary sealing wall are composed by welding their folded edges to both sides of a plate which is by means of a dilatation means. connected to one side of the crates.

In the design of such a ship tank known from the specification of French patent 1,438,330, certain difficulties have been found due to the design of the mechanical connection between the two insulation walls and the ship's hull. The primary insulation wall and the corresponding sealing wall are mechanically connected to the hull by means of vertical profile bars connected to horizontal planks by means of anchoring means passed through the secondary sealing wall. It will be seen that the provision of these mechanical connections with horizontal planks and Vertical profile bars are quite complicated and therefore quite expensive. The same applies to a tight guide of the anchoring members between the planks and the profile bars across the sealing wall.

The invention aims to overcome these difficulties and provides the design of the mechanical connection between the secondary wall and the hull and between the secondary insulation wall and the primary insulation wall without the need for penetration into the metal sheet covering forming the secondary sealing wall.

To this end, a ship tank according to the invention is characterized in that the metal plate which serves to weld the secondary sealing wall metal cladding plates is inserted edge to edge in the horizontal joint plane between the secondary heat insulation wall boxes and relative to these boxes held by a and that along this metal plate there are attachment holders which are firmly connected to the metal plate and are connected by a resiliently deformable member, perpendicular to the secondary sealing wall, to a fixing means for connecting the primary insulation wall boxes to said metal plate.

Compared to the prior art, the composite tank according to the invention has considerable advantages. A simplification of the means is provided to ensure the mechanical connection between the hull and the insulation and sealing walls. It is no longer necessary to use horizontal planks and the vertical profile irons that were previously required. This results in a significant reduction of the labor needed to assemble the tank. It is further found that the use of the construction according to the invention results in a significant reduction of thermal bridges formed by the means which serve to attach the walls to the hull. Finally, the elimination of the horizontal planks and the vertical profile irons significantly reduces the weight of fasteners per m2 of wall. Analogous to French Patent Specification 1,438,330, by 1Λ 2 6 11 3 the construction described herein provides dilatation connections between the sealing walls and the underlying insulation walls, as well as permeability of the gas through the boxes and free circulation of the gas between the boxes.

According to an embodiment of the invention, the metal plate which serves to weld the secondary insulation wall cladding panels edge to edge may constitute the central element of a composite beam, which element is inserted over a portion of its width between two e.g. of wooden strips, the composite beam inserted between two adjacent boxes of the secondary insulation wall in such a way that the strips in the composite beam towards the interior of the tank are retained by elements which are firmly connected to the secondary insulation wall. boxes.

The use of a composite beam of the kind specified here makes it possible to easily form the desired dilatation compound by simply placing the moldings on the beam behind said elements connected to the boxes.

Moreover, the use of moldings can be avoided when the dilatation means according to another embodiment of the invention consists of the folded edge of the metal plate and the opposite folded edge of a metal strip which is attached to the edge of one of the horizontal sides of each a box in the secondary insulation wall, a counterplate for supporting the engaged edges of the dilatation means is inserted between that member and the box that does not carry said metal strip, the dilatation means and its counterplate being arranged in longitudinal recesses that are provided along the edges of the horizontal sides of each box in the secondary insulation wall.

Compared to the first embodiment of the tank according to the invention, the second embodiment has three advantages. The area of the retention zones at each end of the boxes in the secondary insulation wall is greater, whereby the effects of the fastening means may also be greater. The placement in longitudinal recesses of the dilatation means retaining the metal plate in the joint plane between the boxes of the secondary insulation wall makes it possible to avoid gaps between the horizontal surfaces of the boxes, thereby avoiding the insertion of an additional insulating material. However, the removal of the moldings means that a metal strip with a folded edge is mounted on each box.

In the case where the metal plate of the beam may be subjected to tensile stress, the elements connected to the boxes of the secondary insulation wall and serve for retaining the moldings of the composite beam according to the invention may consist of pins fixedly fixed along the edge of each fairly parallelepiped shaped box.

It may be advantageous for the use of screws for securing the strips to design the boxes for the secondary insulation wall on the inside and along the horizontal edge to which the folded strip is attached, with a reinforcing strip consisting of several side by side. placed elements over the entire length of the box In this way, the lower portion of the box can be reinforced without excessive weight gain.

According to yet another embodiment of the invention, the folded strip forming part of the secondary insulation wall dilatation means may be attached to the box by means of screws passed through the box wall and screwed into the reinforcing strips in the interior of the box. This ensures that the strips cannot be torn away from the box.

According to a further embodiment of the invention, the horizontal sides of each box of the secondary insulation wall may be extended beyond the end faces of the box which are perpendicular to the hull, while on each of said elongated portions and in the vicinity of the hull, is attached to the extended portion. This allows for easy installation of the insulation wall.

the number of fastening points on the hull can be significantly reduced when four adjacent anchorage pins belonging to four adjacent boxes of the secondary insulation wall according to the invention are clamped against the wall of the hull by means of a fastening means which is formed as two angular cores , the one flange of each angular body being screwed onto the hull by means of a threaded pin and a nut, while the two angular bodies over the other flange are assembled by means of a bolt. In this way, only one fastener for the corner of four boxes is used.

An elastic tension is obtained when the edge of each angle iron flange parallel to the back of the angle iron has a bent portion perpendicular to that flange.

For a quick assembly of the holders and associated metal sheets, the holders according to one embodiment of the invention may each have two legs disposed on one side of the central metal sheet, on each side of which are welded the folded edges of the secondary sealing wall linings, while each holder is attached to the central metal plate by welding or riveting.

According to a further embodiment of the invention, the connecting means associated with each holder may consist of a threaded rod and a nut and a clamping plate abutting against a recess at each corner of the box for the primary insulation wall and simultaneously abutting the corners of the other three. neighbor boxes. This allows for easy retention of the boxes of the primary insulation wall.

In addition, in order to ensure an elastic deformation, the elastic member connecting the holder to the interconnecting wall boxes 142611 5 may be constituted by an elastically deformable metal ring connected to the holder and the threaded rod of the connecting member.

The invention is explained in more detail below with reference to the schematic drawing, in which fig. 1 is a perspective view of part of a first embodiment of a tank according to the invention, comprising the hull of a primary insulation wall, a primary sealing wall, a secondary insulation wall and a secondary sealing wall; 2 shows the attachment of a holder to the central plate in a composite beam with folded edges of the sheet lining connected to the central plate, the elastic member being a ring perpendicular to the plane of the central plate; FIG. 3 is a sectional view showing the attachment of the secondary insulation wall boxes to the hull, a composite beam being inserted between two superposed boxes of the secondary insulation wall; FIG. 4 is a section through a portion of the device shown in FIG. 1, namely the attachment of the holder to the composite beam, where the folded edges of the cladding plates are welded to the central plate; 5 shows another embodiment of attaching the holder to the beam, the elastic member being a ring located in the plane of the central plate; FIG. 6 shows a further embodiment of the elastic connecting means consisting of two abutting metal blades arranged at their ends, FIG. 7 is a section through the assembly of the folded edges of the primary insulation wall covering sheets, these edges being welded to both sides of a central metal plate which is connected to the primary insulation wall boxes by a sliding joint of the same kind as shown in FIG. 1 and as used in the embodiment of FIG. 8, FIG. 8 is a perspective view of part of the tank according to the invention with insulation walls, sealing walls and part of the hull; FIG. 9 is a perspective view of attaching the metal plate to the one shown in FIG. 8, the insulation wall boxes shown only partially and empty, FIG. 10 the attachment of the secondary insulation wall boxes to the hull of the second in FIG. 8; FIG. 11 is a sectional view of the embodiment of FIG. 9; 12 is a section through the means for attaching to the hull; FIG. 13 is an embodiment of the U-shaped spring shown in FIG. 8, the metal plate of the secondary sealing wall connects to the boxes of the primary insulation wall, and FIG. 14 the one shown in FIG. 13, taken along the line XIV-XIV of FIG. 13th

142611 6

FIG. 1-5 and 7 show a double-walled hull 1 on which are welded threaded pins 2 perpendicular to the hull. The pins 2 are arranged in vertical rows and the distance between the individual pins in a row corresponds to the height of a rather parallel, heat insulating box 3, which is to form the secondary heat insulation wall. The distance between two successive rows of pins 2 defines the length of the boxes, which is dimensioned such that there can be one pin at each corner of a box. The boxes consist, for example. of wood and is filled with a heat insulating material, e.g. the material sold under the name '' Perlite ''.

At 3a, the side of the box 3 abutting against the hull 1 is denoted, while the opposite side is denoted 3b. At each end of the side 3a, the box has strips 4 which are enclosed on the vertical end faces of the box. In the area where four boxes 3 are assembled together, a gap is left between the boxes for that pin. The end of the pin is threaded and has a nut 2a and a square locking or clamping plate 5. The clamping plate 5 enables the simultaneous tensioning of the corners of four adjacent boxes. At 3c and 3d, the horizontal sides of the boxes 3.1 are denoted the area where the sides 3c and 3d are joined to the side 3b, the boxes 3 have fixed strips 6 over the entire length of the box.

The boxes 3 are stacked one above the other on the hull 1 between the rows of pins 2 and clamped to the hull by the clamping plates 5, which press on moldings 4 on four adjacent boxes. The spaces between the boxes 3 are filled with stone wool to complete the insulation.

Between two horizontal rows of boxes is placed a composite beam 7. This beam consists of a central plate 8, which is inserted over a portion of its width between two wooden strips 9. These strips are fixed along one longitudinal edge of the plate 8 and are divided into sections of a length of approx. 1 m with a gap of approx.

20 cm between each section. The moldings above and below the plate 8 lie exactly above each other in such a way that the composite beam carried areas without a molding. The central plate 9 consists of a thin strip of invar. This results in the fact that the composite beams 7 can be easily stored, folding them in the areas where the moldings 9 are not present. The composite beams are placed between the sides 3c and 3d of two superposed boxes 3, the strips 9 being placed on. the side of the moldings 6 facing the hull 1. The central plate 8 is therefore located between the moldings 6 of two superposed boxes 3, which is why the moldings 6 hold back the beam when the beam exerts traction away from the hull 1.

When stacking boxes 3, a wall forming the secondary insulation wall is provided, on the backside 3b of the boxes 3, smooth cladding plates 10 having curved longitudinal edges 11 are placed. The distance between the edges 11 of one and the same plate 10 is equal to the distance between two successive central plates 8 in the heat insulation wall. By welding as shown at 11a, two edges 11 of two superimposed plates 10 are joined to the central plate 8 of the beam 7, thereby affixing the three metal parts to each other. Between two vertical rows of pins 2, the portion of the central plate 8 projecting away from the hull has a substantially trapezoidal cutout 12 which extends all the way to the bent edges 11 of the plates 10.

In the middle region of the boxes 3 and perpendicular to the hull and on the heat insulation wall there are placed in the cutout 12 holders 13, which are formed with a slot, into which the plate part constituting the plate 8 is welded together with the folded edges 11. The holder fastened by welding or riveting as shown in FIG. 4, where the rivet is designated 14. By means of an elastic connecting member, to be described in greater detail, each holder 13 is connected to a rod 15 with threaded end, on which is screwed a nut 15a over a locking or clamping plate 16. Between the rows of holders 13, rods 15 and plates 16, boxes 17 are arranged in such a way that at each corner of a box there is a holder, a rod and a clamping plate. The boxes 17 are quite the same as the boxes 3 in the secondary wall and form the primary wall. The boxes that rest on each other have self-supporting wooden walls and are filled with heat insulating material, e.g. Perlite. At each corner, the boxes 17 have recesses that allow for the holders, rods and clamping plates and have a contact surface for one quarter of the clamping plate 16. Each clamping plate 16 spans four crate corners for four crates 17 in the primary wall.

At 17a, the side of a box 17 facing the secondary wall and the cover plates 10 is denoted, while the opposite side of the box is denoted 17b. The boxes have an upper side 17c and a lower side 17d. On each side 17d along the back side 17b there is provided a recess 18 in which is placed a fastening strip 19 which is folded and engaged with the upper side 17c of the underlying box 17, the strip 19 being attached to the box by means of hooks 20. A folded strip 21 is engaged with strip 19 as shown in FIG. 7. The strip 21 protrudes in a direction away from the hull of the planes where the boxes bear each other.

On the sides 17b of the boxes 17 there is placed a primary sealing wall consisting of cladding plates 22 with folded edges 23. These cladding plates 22 have a width which corresponds approximately to the height of the boxes 17 in such a way that the folded edges 23 of the plates 22 are located. on each side of a strip 21 protruding between the boxes 17. Upon welding, the folded edges 23 and the strip 21 are assembled, thereby forming an uninterrupted primary sealing wall over the back 17b of all the boxes 17 in the primary heat insulation wall. The mechanical connection between the sealing wall and the primary heat insulation wall ensures some slippage due to the strips 19 and 21. The cladding plates 22 consist of invar.

In the manner described herein, a composite tank may be constructed in which all elements are attached to the smooth inner wall, noting that the entire ship's skeleton is between the two walls of said double-walled hull. The mechanical fastening of the boxes 3 to the hull 1 is achieved by means of the pins 2, the clamping plates 5 and the nuts 2a, the clamping plates 5 being clamped on the strips 4. The secondary sealing wall is secured to the secondary heat insulation wall by means of the plates 8 of the beams 7 which are welded to the folded edges 11 of the cladding plates 10. The attachment of the boxes 17 which form the primary thermal insulation wall to the already mounted wall is achieved by strips 9, which are blocked by the strips 6, the flatbread plate 8 with the strips 9, the holders fixed with the plates 8 13 and the clamping plates 16. The attachment of the cladding plates 22 which form the primary sealing wall to the primary heat insulation wall with the possibility of some sliding is secured by the strips 19 and 21 and the fasteners 20. All the elements forming the composite tank are securely fastened to the double-walled hull.

It should be noted that due to the large temperature difference through the elements of the tank during cooling and due to sinkings when the tank is filled, it is necessary for the elements of the primary and secondary walls to be able to move slightly while maintaining a good relationship between the two walls. For this purpose, elastic connecting means are used between the holders 13 and the rods 15. FIG. 2, 5 and 6 show three different embodiments of such elastic connecting means.

As shown in FIG. 2, the holder 3 at the side facing away from the folded edges 11 of the cover plates 10 has a hole 24 for a ring 25 located in a vertical plane. The ring 25 is welded to the rod 15.

FIG. 5 shows a holder consisting of a folded strip. The bottom of the fold is formed with space 13a for a horizontal ring 26 which is passed through a hole 27 at the end 15b of the rod 15. For these two embodiments, it will be seen that during cooling or filling the rings 25 or 26 can be deformed without interrupting the mechanical connection between the two walls.

FIG. 6 shows a third embodiment of the elastic connector. The holder 13 is welded to a vertical metal plate 28 composed of a vertical metal plate 29 which is welded to the rod 15. The two plates 28 and 29 are welded together at their ends as shown at 30. When a pull force is exerted on the rod 15, .g. as the tank cools, the two plates 28 and 29 bend resiliently apart. This embodiment has the same advantages as the two aforementioned embodiments with rings 25 or 26.

In the first described embodiment of the tank according to the invention, all the spaces between the boxes 17 or between the boxes 3 are filled with a porous insulating material, e.g. rock wool that ensures free passage for the gas.

FIG. 8-13 relates to another embodiment of the tank according to the invention.

At 31, the ship's double-walled hull is denoted on which are welded threaded pins 32 perpendicular to the interior wall of the hull. These pins are arranged in vertical rows and are divided into groups of two, the distance between the midpoints of two successive groups in the same row corresponding to the height of a box 33 which is designed as a parallel parallelepiped in the secondary heat insulation wall. The spacing between two rows of pins 32 defines the length of the boxes 33, as one dimensioned such that there is a group of two pins for each box corner. The boxes 33 consist e.g. of wood and is filled with a heat insulating material, e.g. "Perlite". At 33a, the side of the box 33 facing the hull 31 is denoted at 33b. The opposite side is denoted. The horizontal sides of the boxes are denoted 33c and 33d. These sides extend beyond the end faces of the boxes and the projecting portions are denoted 34. Each of these protruding parts 34 at the hull and on the side facing the box has a tab 35 which is attached to the box projections 34 and approximately the same width as this.

The boxes 33 are stacked one above the other on the inner wall 31 of the hull and between the rows of pins 32 and secured to the wall 31 by means of fastening means consisting of two angles 36. Each angle iron 36 has two flanges, namely a flange 36a parallel to the hull and a flange. 36b perpendicular to the hull. The ends 37a and 37b facing away from the top 36c of the angular core are bent perpendicular to the associated flanges 36a, 36b. The flange 36b is slightly shorter than the length of the anchor pin 35. Each angle iron is attached to the hull by clamping a nut on a pin 32 and two angles in the same group correspond to two pins 32 in the same group in the vertical row. Two angular bodies 36 are clamped together by bolts 32. The folded edges 37b of two angular bodies in the same group anchor four pins 35 at one time to four boxes 33 of the secondary heat insulation wall. The sides 33c and 33d of two boxes 33 are in contact with each other practically without clearance. In contrast, the distance between the end faces of the boxes perpendicular to the hull 31 is slightly greater than twice the width of the projecting portion 34.

On the box sides 33c and 33d of the secondary heat insulation wall, a longitudinal recess 38 is provided along the backside 33b. Within the box next to this recess, longitudinal reinforcement strips 39 are divided into individual sections to accommodate cross walls 40 in the boxes 33. the strips 39 are attached or glued to the boxes. Two longitudinal recesses 38 from two neighboring boxes 33 form a space in which are provided dilatation means consisting of a strip 41, a metal plate 42 and a counterplate 43. The strip in the recess 38 is secured to the box 33 by means of screws. 44 in the bottom plate 33d and the strip 39. The edge of the strip 41 facing away from the hull is folded 180 ° and the metal plate 42 also has a 180 ° folded edge which, in engagement with the aforementioned edge, forms a dilatation means for anchoring the metal plate 42 on the secondary heat insulation wall boxes 33. The metal plate 42 must be able to withstand a large thrust in the direction perpendicular to the inner surface of the hull and to prevent the two folded flanges of the dilatation member from opening under this force, between this member and the bottom of the recess 38 in the lower one. box 33 is provided with a counterplate 43. From the foregoing, it can be seen that the metal plate 42 is attached to the secondary heat insulation wall without the need to provide a cavity µm between the box sides 33c and 33d.

When stacking boxes 33, a wall forming the secondary heat insulation wall is provided, smooth metal plates 45 with folded edges 46 on the side 33b of the boxes 33 are placed. The distance between two folded edges 46 on a cover plate 45 is equal to the distance between two successive metal plates 42 in the provided wall. In welding, the folded edges 46 of two superposed plates 45 are joined to the intermediate plate 42 so that the three metal plates are welded together as shown at 46a. Between two successive rows of pins 32, the plates 42 have holders 47 which are welded to the plates as shown at 47a. The holder may consist of two, welded plates located on each side of the plate 42, which are not only welded at 47a but also in a parallel zone 47b at the longitudinal edge of the plates. Each holder 47 through a U-shaped spring 48 is connected to a threaded pin 49 on which a nut 49a can clamp a locking or clamping plate 50. Between these connecting means, namely the holder 47, the spring 48 and the plate 50, are placed wooden boxes 51, each box is positioned so that there is one set of connecting members 47, 49, 50 at each box corner. The boxes 51 are the same as the boxes 33 in the secondary wall and here form the primary heat insulation wall. However, these boxes do not have the previously mentioned projecting portions 34 and the longitudinal recesses found in the secondary wall boxes on the upper and lower sides of the boxes exist only here on the underside. This difference can be seen in FIG. 8, showing the connection between two boxes 51.

The boxes 51 are designed as the boxes 17 in the first embodiment and are assembled as shown in FIG. 7. The individual constituents are the same, simply denoted by other reference numerals. In the same manner as described in connection with the first embodiment, a dilatation means with collapsing folded flanges serves to hold in the joint plane a metal strip 55 welded on each side to the folded edges 57 of cladding plates 56. The metal plates 11 U2611 45 and 56 consist of Invar. For the other details, reference is made to the description of the first embodiment of the primary heat insulation wall and the primary sealing wall.

The spring 48, which is in the form of an inverted U, consists of a U-shaped blade of a metal which, at very low temperatures, has a high elastic limit. One end of the spring is connected to a plate 48a which rests on both the folded edges 46 and on the holder 47. The connection between the plate 48a and the holder 47 is constituted by a pin 48b which is passed through the plate 48a and the holder 47 and is held on space using a stainless steel wire 48c designed as a safety pin. The spring 48 ensures an elastic deformation in the direction perpendicular to the hull 31, whereby the primary wall can be moved relative to the secondary wall. The production and placement of this dilatation organ is very simple and inexpensive.

In the manner described, a composite tank can be built up inside the ship where the individual components are connected to the ship's smooth inner wall, assuming that the ship's structure is located between the two walls of the double-walled hull 31. The mechanical fastening of the boxes 33 to the hull 31 take place by means of the pins 32 and the said angle iron 36 in engagement with the pins 35. This structure allows for elastic deformation of angle iron 36 to offset dimensional differences when the boxes 33 are placed in place. It also ensures good mechanical strength should one of the pins 32 break so that there is good security. The secondary sealing wall is attached to the secondary insulation wall by means of the plates 42, which gives the following advantages: firstly, there is no space between the superposed horizontal sides of the boxes 33. Secondly, the connecting means 41, 42 can be exposed via the metal plate 42 for excessive stresses due to the presence of the counterplate 43 which limits the unfolding of the connector to approx. 1 mm. The fastening of the boxes 51, scanning forms the primary heat insulation wall of the secondary wall elements takes place by means of the metal plate 42, holders 47, spring 48, pins 49 and clamping plates 50. The resilience of spring 48 makes it possible in the same way as in the first embodiment. achieve some movement between the elements of the primary wall and the secondary wall.

Claims (17)

142611 12 Float tank for transporting gas in liquid state and of the type which is heat insulating, tightly closed, assembled and built into a ship's hull and comprises two successive sealing walls, namely a primary wall in contact with the product contained in the tank and a secondary sealing wall located between the primary wall and the hull, which walls alternate with two heat insulating walls, of which the secondary heat insulation wall is made up of boxes (3, 33) which are filled with a heat insulating material and are directly attached to the inner wall of the double-walled hull (1, 31). of threaded pins (2, 32) which are firmly connected to the hull, the secondary sealing wall consisting of metal cladding plates (10, 45) having edges away from the hull (11, 46), and the height of which is approximately equal to the height of the said boxes, which cladding plates have their folded edges welded together with a metal plate (8, 42) which can slide relative to the underlying thermal insulation wall, while the a primary heat insulation wall is made up of boxes (17, 51) filled with heat insulation fabric and the primary sealing wall is constructed as said secondary sealing wall, wherein the primary sealing panels (22, 56) are composed by welding their folded edges to both sides of a plate (21, 55) connected by means of a dilatation means to one side of the boxes, characterized in that the metal plate (8, 42) serves to weld the metal lining plates (10, of the secondary sealing wall). 45) edge to edge is inserted into the horizontal joint plane between the secondary heat insulation wall boxes (3, 33) and relative to these boxes held by a dilatation means, and there are fastening holders (13, 47) along this metal plate which is fixedly connected to the metal plate and is connected to a fixing means (15, 49) by a resiliently deformable member (26, 28 or 29, 48) perpendicular to the secondary sealing wall. ) for connecting the primary insulation wall boxes (17, 51) with said metal plate (8, 42). Tank according to claim 1, characterized in that the metal plate (8) which serves to weld the lining plates (10) of the secondary insulation wall edge to edge constitutes the central element of a composite beam (7), which element over part of its width is inserted between two e.g. of wooden strips (9) and said composite beam (7) being inserted between two adjacent boxes (3) of the secondary insulation wall in such a way that the strips of the composite beam towards the interior of the tank are retained of elements (6) firmly connected to the secondary insulation wall boxes (3). 13 142611 Tank according to claim 1, characterized in that the dilatation means consists of the folded edge of the metal plate (42) and the opposite folded edge of a metal strip (41) which is attached to the edge of one of the horizontal sides of each a box (33) in the secondary insulation wall, a counterplate (43) for supporting the engaged edges of the dilatation means is inserted between that member and the box that does not carry said metal strip, the dilatation means and its counterplate (43) ) are arranged in longitudinal recesses (38) provided along the edges of the horizontal sides of each box (33) in the secondary insulation wall. Tank according to claim 2, characterized in that the moldings (9) on both sides of the central metal plate (8) of the composite beam (7) are made of wooden strips divided into equal length sections, that the sections are placed on and below the beam exactly above each other and that two successive sections are separated by an interval where the beam consists only of the central plate (8). Tank according to claim 2 or 4, characterized in that the elements (6) which are connected to the boxes of the secondary insulation wall and serve to retain the moldings on the composite beam (7) are constituted by pins which are fixedly arranged along the edge of each as rather parallelepipedum shaped box. Tank according to claim 3, characterized in that the boxes for the secondary insulation wall on the inside and along the horizontal edge on which is attached the folded strip (41) have a reinforcing strip (39) consisting of several side by side arranged elements over the entire box length. Tank according to claim 6, characterized in that the folded strip (41), which forms part of the secondary insulation wall dilatation means, is secured to the box (33) by means of screws (44) passed through the box wall and is screwed into the reinforcing strips (39) in the interior of the box. Tank according to claim 3, 6 or 7, characterized in that the horizontal sides (33c, 33d) of each box (33) in the secondary insulation wall are extended beyond the end surfaces of the box which are perpendicular to the wall of the hull (31), and that on each of said elongated parts (34) and in the vicinity of the hull there are anchor pins (35) attached to the elongated part. Tank according to claim 8, characterized in that four adjacent anchorage pins (35) belonging to four adjacent boxes (33) of the secondary insulation wall are clamped against the wall (31) by means of a fastening means formed as two angular jaws (36), one flange of each angular jaw being screwed onto the hull by means of a threaded pin (32) and a nut, while the two angular jaws over the other flange (36b) are assembled at using a bolt (38) « Tank according to claim 9, characterized in that the edge of the flange (36) of each angular body parallel to the back of the angular body has a folded portion (37a, 37b) perpendicular to the flange concerned. Tank according to one or more of the preceding claims, characterized in that the holders (13, 47) each have two legs arranged on each side of the central metal plate (8, 42) on each side of which is weld the folded edges (11, 46) of the secondary sealing wall coverings (10, 45) and each holder is attached to the central metal plate by welding or riveting. Tank according to one or more of the preceding claims, characterized in that the connecting means connected to each holder (13, 47) consists of a threaded rod (15, 49) and a nut (15a, 49a) as well as a clamping plate (16 , 50) abutting a recess at each corner of the box (17, 51) for the primary insulation wall and simultaneously abutting the corners of the other three neighboring boxes. Tank according to one or more of the preceding claims, characterized in that the elastic member connecting the holder (13) with the connecting member cooperating with the boxes of the primary insulation wall (17) is constituted by an elastically deformable metal ring (26) which is connected to the holder (13) and the threaded rod (15) of the connecting member. Tank according to claim 13, characterized in that the elastically deformable ring (26) connected to the holder (13) is located in the same plane as the central metal plate (8) to which the ring is attached, or in a plane perpendicular to the this plate. Tank according to one or more of claims 1-12, characterized in that the elastic connecting means inserted between the holder (13) and the fastening means cooperating with the boxes of the primary insulation wall are formed by two welded at each other at their ends. metal blades (28, 29), one of which blade (28) in its middle region is welded to the holder (13), while the other blade (29) is welded to the rod (15), the plane of contact between the two blades parallel to the plans for the primary sealing wall and the secondary sealing wall. Tank according to one or more of claims 1 to 12, characterized in that the means which permits an elastic deformation in the direction perpendicular to the secondary insulation wall and is inserted between the holders (47) connected to the metal plate (42) of the secondary insulation wall (47) and the fasteners (49, 50) for securing the primary insulation wall boxes (51) to the metal plate are constituted by a U-shaped leaf spring (48), one leg being connected to the holder while the other leg having a threaded pin (49) ) for securing the secondary insulation wall boxes (51). Tank according to claim 16, characterized in that the U-shaped spring (48) is secured to the holders (47) of the secondary insulation wall by means of pins (48b) which are passed through the holder and the end of one of the