DE2125264A1 - Transport containers in ships for cryogenic liquids - Google Patents

Description

Dr. rer. nat, DIETER LOUIS Diploma in Phys. CLAUS PGHLAU Dipl.-Ing. FRANZ LOHRENTZ
8500 NUREMBERG

«" «», 2006/07 20 / H

WILLIAM HAMILTON, Mill Brae, Camberley, Surrey, England

Transport containers in ships for cryogenic liquids

The invention relates to a transport container in ships for cryogenic liquids, in particular for liquefied liquids Gas. Such storage and transport containers in ships are used to carry liquefied natural gas in large quantities to transport.

The construction of storage and transport containers for cryogenic liquids encounters a number of difficulties which do not occur with conventional storage containers, the contents of which are at ambient temperature. If a storage container is filled with a cryogenic liquid, the considerable drop in temperature causes a contraction of the container walls, which is normally of the order of several centimeters, if the entire container is not made of a material with a negligible coefficient of thermal expansion, such as e.g. · Is the case with Invar steel «, such storage tanks are

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but inevitably extremely expensive. However, the walls can a container made of Invar steel in contrast to one made of other materials with normal temperature coefficients built-up containers directly on other elements, for example on a ship's wall, with intervening Isolation to be attached. However, if the high manufacturing cost of an Invar steel Container are to be avoided, it has hitherto been necessary to construct the container so that it stands freely, so is self-supporting, so that its walls accept the hydrostatic pressure exerted by its contents without any external support endure. In the pail where such containers are installed in ships, the container walls have to be added be sufficiently rigid to withstand the increased loads in addition to the hydrostatic pressure load, which occur due to the sloshing back and forth in the EoIl and yaw movements of the ship. This results in, that despite the use of cheaper materials, the necessary stiffer construction only makes a relatively small saving brings in terms of manufacturing costs.

The invention is therefore based on the object of designing containers of the type described in such a way that they meet the expected Withstand loads with certainty, but significantly cheaper in their cost price than the known ones Containers are. According to the invention this is achieved in that each container wall is corrugated so that the waves in the same Direction, with the waves of the end walls running vertically and the waves on the other walls running in the longitudinal direction of the ship j and that the side walls on the ship wall by sliding connection © !! are attached, which is a relative shift allow in the longitudinal direction,

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The inventive design of a container of The type described at the outset is the thermal expansion or contraction of the end walls running in the vertical direction by resilient deformation of the adjoining areas of at least the bottom and top walls, those with the end walls connected. Because of this arrangement, it is still not necessary to take precautions for a To meet displaceability in the width direction. Since the end walls are also provided with vertically running waves, it is also not necessary to have a special lateral displacement to take account of thermal expansion and contraction the end walls to be provided. The side walls of the container are supported by the ship wall without being perpendicular relative to the ship's wall a relative displaceability of the side walls must be maintained in order to absorb the thermal expansion that occurs to consider. However, if it is provided that the top wall of the container should not be freely movable, then accordingly, the side walls must be provided with the waves running in the horizontal direction, while those with the end walls provided with vertical waves taking into account, their thermal expansion are maintained, which is preferably due to an elastic deformability of the adjacent Areas of the side and top wall is achieved. The areas in between are the side and ceiling walls at least held against outward movement, but while allowing longitudinal movement.

In the case of larger containers, the container walls are supported at certain intervals in the longitudinal direction of the waves. To the End walls, this can be done by horizontally extending beams, with mutually corresponding beams on the opposite Container ends are connected to one another with tie rods

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are bound, which extend through the container and preferably consist of a material which has the same or a comparable coefficient of thermal expansion as the material of the container side walls. Since no relative displacement is required between the tie rods and the container walls through which they run, the liquid-tight connection between these tie rods and the corresponding container walls can be made by welding. The side walls of the container can be supported by means of supporting brackets which also provide thermal insulation to an outer support structure, for "B _e of the vessel wall. An insulating self-lubricating material such as polytetrafluoroethylene or Tufnol is advantageously suitable for this purpose. Wear blocks, which are held by the walls, are preferably inserted between the walls and the support brackets.

In a preferred embodiment of the invention, the corrugated walls of the container consist of a weldable cold-resistant one Aluminum alloy. The wall thickness can vary depending on the load from 2.5 cm to 1 cm and the Walls can be constructed from individual panels, each of which is extruded or extruded. Boards of this kind can be extruded up to a width of 1.2 m with the currently existing facilities. The construction can then be done so that each table comprised two complete shafts

In addition to the corrugation, the extruded sheets or strips can also be formed so that they are longitudinally the shafts have flange-like projections. Through this pr

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cracks, attachment points are created at the same time facilitate the lifting of prefabricated units during assembly in the ship.

The tie rods are preferably also manufactured using an extrusion or extrusion process. They also expediently exist made of the same alloy as the container and are hollow. In this case they are connected to one another by bolts made of stainless steel, which are screwed into their adjacent ends.

In another embodiment, the panels or strips from which the containers are constructed can be made from 9% nickel steel be rolled.

The individual panels or strips are preferably joined together welded to prefabricated units under workshop conditions, which are then inserted into the Ship using a crane or the like. can be collected. In this way, the scope of assembly welding work becomes whole significantly reduced and the majority of the welding operations and welding inspection under cheaper and easier Conditions carried out in operation.

In one embodiment of a container according to the invention, it can have two corrugated walls lying next to one another, which are inclined at an angle to one another and whose waves run in the same direction and which with one another are connected by a corrugated section. The two walls preferably close tangentially to the curved one Section at. With this construction, shrinkage phenomena and thermal stresses in the wall material can be avoided

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distribute more easily due to the thermal contraction. The curved section can already be produced corrugated in the extrusion process in the same way as already explained above be. Advantageously, the shafts of the curved section are held by support brackets, the one protruding Have nose, which protrudes into an outer wave trough between two waves, while a base surface in a channel-shaped support element at a distance from the shafts whose curvature is adapted, arranged. Preferably, these base surfaces slide freely in the support brackets channel-shaped support element arranged so that they are able to take a position in which they are not the local Prevent displacements of the waves or their walls during thermal expansion or contraction. Simultaneously they must ensure free movement of the shafts in their longitudinal direction. For this purpose they are preferred made of a material with a low coefficient of friction, such as polytetrafluoroethylene or Tufnol, or coated with such a material. Materials of this type also serve as thermal insulation.

For the purpose of saving material, the support brackets are advantageous designed as an open construction, e.g. essentially in the form of a trapezoid, the base of which is in the channel of the channel-shaped element is held by a suitable clamp that allows a sliding movement of the console base in the Channel allowed.

When assembling a container according to the invention, the entire curved corner unit can be prefabricated, so that not only the corrugated and curved wall part, but also the support brackets and the curved channel conveying

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Migen support elements includes. This entire assembly can then be lifted or the like _β means of a crane and the ship, be moved into the construction site, for example, where then the curved corrugated wall panel and the curved channel-shaped support members to the respective ends of the remaining parts of adjacent wall sections welded «

Further advantages and features of the present invention emerge from the following description of preferred exemplary embodiments as well as from further subclaims.

Show it:

1 shows a plan view of a ship transport container for liquefied natural gas;

Fig. 2 is an end view, partially sectioned along the Line II-II in Figure 1;

3 shows a partial end view of a container according to the invention on an enlarged scale;

4 shows a detail of a fastening for a container according to the invention;

5 shows a section along the line V-V in FIG Junction between an end wall and the lower inclined portion of a side wall of the Container;

6 shows a sectional view corresponding to FIG. 5, section along the line VI-VI in Figure 3;

7 shows a vertical section of the connection point between an end wall and the bottom and top wall of the container;

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8 shows a junction of an end wall and the part of a side wall, sectioned along the line VIII-VIII in Figure 3;

9 shows a view of a tie rod and its connection points with the container wall and a roll wall in the container;

Fig. 10 is a plan view in the direction of the line X-X in Fig. 9;

11 shows a detail of a support system for a shaft of a container wall;

Figo 12 is an end view of the near the top and areas lying at the bottom of the container, partially cut;

13 shows a detail from FIG. 12 on an enlarged scale; FIG. H shows a section along the line XIV-XIV in FIG. 13;

15 shows a wall section of a further embodiment on average;

16 shows a detail from FIG. 15 on an enlarged scale;

17 shows a perspective view of individual construction elements shown in FIG. 15 and FIG

18 shows an exploded view of the parts shown in FIG.

The container for liquid natural gas shown in FIGS. 1 to 11 is built into a hull (not shown). As FIG. 2 shows, this container has a bottom wall 1, a top wall 2 and side walls 3 with a vertical section 4 and inclined lower and upper sections 5 and 6. The two front ends of the container are vertical End walls 7 closed.

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Each container wall is constructed from panels or strips made from a weldable, cold-resistant aluminum alloy exist and are preferably extruded to get the required corrugated profile and the appropriate length. The individual extruded panels or strips can be up to 1.2 m wide and in this way two at a time Contain shafts 8, which are shown for example in the lower inclined wall section 5 in FIG. The extruded Table 9, which contains the shafts 8, also has a narrow rail-like projection between the two shafts 8 10. This projection, which is shown on an enlarged scale in Figure 4, can be surrounded by two brackets 11, by means of the panel 9 can be anchored at any point on the ship's wall or a support frame.

The wall section 5 is prefabricated in that panels 9 lying next to one another are along their connecting edges 11 with one another be welded ,, This weld can be carried out in the manufacturing plant under precisely controlled conditions and the weld seams can also be examined in a known manner. The wall section thus produced can then by means of a crane or the like. be driven into the ship in which the container is being built. The attachment when retracting takes place again by means of the gripper or clamps 11, which grasp the rail-like projections 10 for this purpose.

The remaining wall sections of the container can be manufactured in a similar manner at the factory from corresponding extruded sheets be prefabricated. In this way, the amount of welding work that is carried out and inside the ship need to be monitored is significantly reduced. As shown in the embodiment in the drawings, it can it may be desirable to have different wave sizes in the

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to train its walls according to the different load pressures and bending moments, which the walls in operation are exposed. For example, the bottom wall 1 rests on a solid bed of insulating material, not shown, so that it is supported by this uniformly over its entire surface. The corrugations in the bottom wall 1 serve accordingly only to absorb the thermal expansion or contraction of the bottom wall 1 in the lateral direction when the container is filled or emptied with liquid gas. The end walls 7, however, are free and their corrugation is accordingly The cross-section is considerably deeper, in order to provide the necessary rigidity against the load from the container in the container To bring liquid body »The bottom wall 1 is with the lower wall sections 5 of the side walls by means of a corrugated extruded profile 13 (Figure 3) of special cross-section connected, which is connected to the edge of the bottom wall 1 welded flange 14 and another flange 15 which is angled so that it is at 16 to the lower edge of the lower wall section 15 can be welded. Other specially designed profiles, e.g. 17 and 18, for connecting the upper inclined wall sections 6 to the top wall 2 and the vertical side wall section 4 used.

Are bevelled, the waves in the bottom and top walls 1 and 2 extending in the fore and aft and have the same spacing as that of the shafts of the front wall 7. Their ends may thus at a suitable angle, as shown in FIGS _e 7, so that they fit together and can be welded together _? without the need for other specially shaped extrusions. As FIG. 7 further shows, there is also no need to saw off the corrugated panels or strips of the bottom wall 1, because, according to the diagram, these can

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position at 19 continue to run the weight load of the vertical end wall 7 over a larger pressure area of the underlying To distribute insulation material. The horizontal waves in the inclined wall sections 5 and 6 of the side walls 3 can with the vertical waves of the end wall 7 by means of simple, in cross-section L-shaped extruded profiles 21 and 22, the design of which can be seen in FIGS. 5 and 6, respectively. In this training and Arrangement, there is no difficulty in compensating for the differences in terms of the wave depth (see FIG. 6), if the waves in the end wall 7 are considerably deeper than those in the upper inclined side wall section 6. As the Figure 8 shows, the vertical wall sections 4 of the side walls 3 can directly with the flat profile leg or flange 23 of a special profile 20 of the end wall 7 are welded. The flanges of the extruded profiles 13, 17, 18, 20, 21 and 22 with a special cross-section are anchored to the ship's wall by means of bolts 24.

The end walls 7 are formed by horizontal truss-like structures made of nickel steel or an aluminum alloy Supports 25 supports which are arranged at vertical distances from one another. The beams at opposite ends of the container are connected to one another by tie rods 26, which run through the end walls 7 and are in Extend the longitudinal direction of the interior of the container. The tie rods 26 also serve to hold and support a vertical transverse rolling wall 27, which is constructed in a manner similar to the end wall 7 from corrugated panels. The swaying wall 27 is also held by horizontal trusses 28, which are constructed similarly to the trusses 25th

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The construction of one of the tie rods 26 results in detail from FIGS. 9 and 10. This tie rod is made from extruded profiles 29 constructed from the same aluminum alloy as the container walls. The extruded profiles 29 are in their outer Cross-section limitation hexagonal and have a cylindrical bore. At the end of each profile is the bore diameter slightly reduced and has an internal thread, through which each profile section with the next by means of a Screw bolt 30 made of stainless steel can be connected.

At the point at which the tie rod 26 penetrates the end wall 7, the end of the respective extruded profile 29 is with a filler piece 31 of the same aluminum alloy "welded. The filler piece 31 is in turn welded to the walls of a shaft welded in the end wall 7, so that this creates a reliable seal. In the end of the tie rod profile 29 a threaded bolt 32 is screwed in, which passes through the filler piece 31, a hole in the end wall 7 and the truss 25 extends through to the outside and at its outer end a nut 33 and a washer 34 between nut and carrier 25 carries. In a similar v / eise serves at the passage of the tie rod 26 through the rolling wall 27 and the wall arranged there Carrier 28 a threaded bolt 35 made of rust-proof steel to the loop wall 27 with the carrier 28 by means Connect nuts 36 and 37. The two ends of the threaded bolt 35 are again in the subsequent ends of the Extruded profiles 29 screwed in the tie rod.

According to the illustration in FIG. 9, the curling wall is preferably 27 also provided with rail-like projections 10, can be attached to which gripping hooks 38, the

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are connected to the carrier 28 via bolts 39 and bracket 40.

As the tfigur 1 shows, the container with a be equipped in the longitudinal direction rolling wall 41, which is supported by vertical beams 42 in the same way as the transverse rolling wall 27 is held by the supports 28. The beams 42 are made by transverse tie rods 43 held in place, their construction is similar how that of the tie rods 26 is and which penetrate the side walls 3. They are made of rustproof on the hull Steel attached to existing springs. To prevent the tie rods 26 and 43 from passing under their own weight, they are preferably, especially in the case of very long containers, by means of a light framework indicated by 44 in FIG supports. The tie rods 26 and 43 then rest on short rods 45 which protrude from the framework 44.

FIG. 11 shows a support arrangement for a shaft 46 of the side wall 3 or the top wall 2 of the container. It is a wear plate 47, preferably made of the same cold-resistant aluminum alloy, welded to the shaft 46 and is supported on a buffer 48 made of polytetrafluoroethylene on a support element connected to the hull 49 is attached. The buffer 48 has countersunk bores 50, the screws 51 provided with nuts 52 take up. The polytetrafluoroethylene buffer 48 also acts as a heat insulator and sets the friction between itself and the Wear plate 47 down to a minimum. The side walls 3 are thus indicated by the gripping hooks 11 in a manner indicated by arrows Held in place with their shafts securely attached to the polytetrafluoroethylene buffer by the grappling hook 48 must be pressed. A movement of the side walls in the direction of the ship's wall and away from it is thus prevented.

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changes, while however free expansion and contraction in the longitudinal direction is possible. The top wall 2 of the container is correspondingly connected to the deck structure over its entire width and the greater part of its length. However, there is no buffer 48 in the immediate vicinity of the connection between the top wall 2 and the end walls 7, so that the end portions of the top wall 2 can freely deform resiliently to the contraction or expansion to be able to absorb the end walls 7 imposed vertical movement. For the same reason, the Near the connection points between the upper inclined side wall sections 6 and the end walls 7 buffer 48 omitted will.

As mentioned above, the container shown in the drawings is built up within the ship from prefabricated units. Thus, for example, the bottom wall can _e be prefabricated in two sections which extend over the entire length of the container and its half width. They can then be retracted into the interior of the ship and placed on the bed of thermal insulation material, in which a narrow gap has been left free in order to weld the two sections and to be able to inspect the weld seam. Then this gap is also filled with insulating material. In a similar way, the tie rods can also be preassembled and introduced in longitudinal sections, the length of which corresponds in each case to the distance between the rolling walls and the side or end walls.

If the container is in operation with a cryogenic liquid, e.g. with liquefied natural gas, it is first filled with gas just above its liquefaction

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cooling point. This causes the container walls and the tie rods to contract. The two end walls 7 are thereby drawn towards each other, while the side walls 3 and the top wall 2 are fixed to the hull and cannot move in the direction of the inside of the container. But it will all come from this Deformation restraint resulting stresses due to the resilient deformation of the waves in the wall sections involved recorded. It is therefore only necessary to reduce the thermal expansion or contraction of the container walls in the longitudinal direction to enable. In the case of the floor, side and ceiling walls, this leads to an overall shortening of the Container length. In the case of the end walls 7, on the other hand, the shortening of the wall height during precooling leads to a yielding one Deformation of the top wall 2 and the upper inclined side wall sections 6 in the area of their connections with the end walls.

The container is then filled with liquefied gas. In general, this is at a considerable temperature below its boiling point, so that accordingly the bottom wall 1 in front of the remaining parts of the container structure first is further cooled. The resulting contraction of the bottom wall 1 is due in the transverse direction recorded another deformation of its wave structure, while the contraction in the longitudinal direction causes a certain deformation of the end walls from their planes. It exists However, no difficulty in designing the container so that these deformations that occur during the filling process on the container occur, remain within the elastic limit of the wall material.

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In the exemplary embodiment explained above, the rolling wall running in the longitudinal direction can be omitted or be placed horizontally. Their waves also extend in the longitudinal direction of the container, while the trusses run across the width of the container. the Tie rods are then vertical again and are connected to the floor or Top wall of the container with suitable stainless steel springs Steel connected to the necessary length deformability to ensure the tie rod. In this arrangement, the horizontal swaying wall serves as a supporting wall opposite Rolling movements of the ship.

Typically four or more of the containers described above are installed in the hold, with them in The longitudinal direction of the container and the ship are arranged at a distance from one another. TJm the isolated room on the To monitor the outside of the container walls, a leak monitoring device can be placed there «

FIGS. 12 to 14 show a container construction which, in principle, corresponds to the embodiment described above equals., This container also comprises a bottom wall 101, a top wall 102, side walls 103 consisting of a vertical section 104 and upper and lower connection sections 105 and 106 are made, and vertical end walls 107.

Each wall is constructed from panels made from a weldable cold-resistant aluminum alloy and preferably are made by extrusion in order to obtain the required corrugated profile and the necessary length. the Extruded panels are welded together at their longitudinal edges in an automatic welding system in the manufacturing plant

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welded and thus built into individual wall sections. In view of the great length of the extruded profiles it is It is advantageous to keep two panels lying side by side separated from each other by a narrow gap and in this To guide the gap along a template cutting machine in order to peel off the sheet edges before the welding process. In this way minor inaccuracies due to a non-rectilinear extrusion process are eliminated and the adjacent edges to be welded are precisely aligned with one another. If necessary, the sheet edges The extruded profiles are already drawn off in the manufacturing plant, from where the 'individual panels, for example by Can be brought to the shipyard by ship or by train for the manufacture of containers. Of course it is then from Meaning. That the individual panels are marked with regard to their assignment to ensure that each the mutually aligned and peeled edges are welded together.

As can be seen in the drawings, each of the panels has the walls 102, 104, 105 and 106 by extrusion directly molded rail-like ribs or projections 111, which consist of a web 112 and a slightly wider head 113 exist and are arranged in the center of the recess formed by each shaft and opening outward.

Essentially trapezoidal support brackets 114 have sections that the inclined side walls 115.der of the shafts formed wells are adapted. The consoles 114 consist of a synthetic resin-bonded textile material, which is in the Commercially available under the name "Tufnol" and have a central trapezoidal opening 116. The apex

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wall of each console 114 has a T-shaped groove 117, the pushed onto the longitudinal rib 111 in the associated shaft and can be moved to the correct position in the longitudinal direction. The sloping side walls 118 of each console are at 119 set off to a shoulder and thus the shape of the Walls 115 adapted. Preferably is between the base 121 of each recess and the upper edge of the consoles 114 Gap 120 kept free. The base 122 of each bracket 114 rests in a support element 123 of channel-shaped cross-section, that is connected to the hull. In view of, that the consoles 114 consist of a thermally insulating material, it is not necessary to use the support elements 123 can also be made from a cold-resistant material. The consoles 114 are in the channel cross-section of the support elements 123 held by bracket 124 through which bolts 125 square in cross section are inserted, which on slide the base 122. The bolts 125 are secured against loosening from the brackets 124 by cotter pins 126.

Since between the consoles 114 and the extruded profiles of the Container walls on the one hand and the channel-shaped support elements 123, on the other hand, has a relatively low coefficient of friction is present, the brackets 114 can each by thermal expansion or -contraction caused movement relative to both parts slide and each take a position in which they induce minimal loads in the container, but at the same time the wall panels against all loads that be exercised on them by the body of liquid in the container.

Again, it is again an advantage ₉ each of the curved wall sections 105 and 106 during the manufacturing operation

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to be prefabricated as a complete unit. The consoles 114 are already there in each recess in the appropriate number and appropriate distance to the expected to absorb external pressure or shear loads to which the corresponding wall section is exposed. Be at the same time also the channel-shaped support elements 123 with the consoles 114 connected by the bracket 124 and the bolts 125. The entire arrangement produced in this way is used during assembly on site and Place set and the curved channel-shaped support elements 123 * are on the ship's wall and the adjoining rectilinear support elements 123 of the bottom wall 101 and / or of the vertical side wall section 104 attached. The long edges of the corrugated wall portions 105 are connected to the corresponding wall portions 101, 104 and 102 by welding.

To the formation of suitable connections between the individual wall sections on the construction site in the ship despite minor To facilitate deviations and irregularities of the longitudinal edges to be connected, there is preferably the edge-side Panel of each wall section from an extruded profile 131 (Figures 12 and 13) with a special cross-section. These Extruded profiles 131 differ from the other panels 132 in that the outer edge of the prefabricated Wall section has a splash 133. When assembling the container, the respective planes 133 are, as far as possible is brought into contact with one another and the contact thus produced is improved and evened out in that channel-shaped clamping pieces 134 are driven over both planes 133. The clamping pieces 134 extend over the full Length of the connection point and are welded to the plane roots 135. The clamping pieces 134 have a sufficient

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Rigidity to withstand the separating forces occurring during operation. As a result, the weld seams 135 do not become Subject to great stresses and thus serve essentially as a seal.

It is also an advantage to have a bridge at each welding point, e.g. 137, through which the two parts are connected 136 (Figure 13) and in the space 138 formed under this bridge 136 under an inert gas "to initiate a pressure slightly greater than the pressure inside the container. In this case, there is no gas leakage from the inside of the container to the outside if the weld 137 or a of the welds 139 between the bridge 136 and the welded parts 131 and 132 leaks. Instead, just go inert gas is lost from the space 138 and is replaced again from a corresponding gas source, this at the same time serves as an indicator that a leak is present. A similar protective measure is for the welds 135 by means of W-shaped bridges 141 created, which are welded at 142 to the panels 131 and at 143 to the clamping piece 134 »

The top, bottom and side wall sections 102 to 106 are connected to the end walls 107 by angle pieces 151 - in the case of the flat Sidewall sections - and 152 - in the curved sidewall sections - tied together. The angle pieces 122 are shaped in accordance with the curvature of the curved wall sections. Here, too, there are again indicator spaces for pressurized inert gas along the weld seams 153 by bridging (Figure 14) created.

When the container is filled with liquefied natural gas, the end walls pull in a vertical direction (normal to the

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Zeidienetene in Figure 14) together. Also the angle piece 151 shrinks in the same direction, thereby deforming the corrugations in both the flat and the curved side wall sections 104, 105 and 106. This movement is achieved by shifting the bases 122 of the consoles 114 in the channel-shaped support elements 123 and a flexible Deformation of the shaft walls added in the side wall sections. At the same time, the side wall sections pull even in their longitudinal direction together, so that the angle piece 151 - in FIG. 14 - is pulled to the left. These Movement is immediately taken up by a relative displacement between the .Scheitel of the consoles 114 and the inclined Walls 115 and the rails 111. Accordingly Apart from the direct pressure loads, no significant forces act on the consoles 114.

Figures 15 to 18 show an arrangement by means of the corrugated container walls can be used on the ship's wall in those cases where it is impossible or it is inexpedient to place a rib or rail on the corrugated sheets in the manner of the rib 111 in FIGS. 13 and 14 to manufacture. This is the case, for example, when the individual panels are rolled, similar to the usual Sheet metal production. It is clearly impractical to extrude 9% nickel steel to shape. It would be possible to have a continuous rib to be welded onto a roll plate, but the embodiment shown in FIGS. 15 to 18 offers in contrast to this Advantages"

The panels 151 and 152 according to FIGS. 15 to 18 are rolled from 9 inferred nickel steel. Any wall section can be made from

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eight of the straight-edged sections 151 exist, which are welded together edge-wise and at their two outer ones Edges each have a panel 152 welded to a special cross-section, the free edges 153 in special Are designed in such a way that they are based on the the design of the adjoining rolled profile of the next section by means of U-shaped clamping pieces 154 can be fastened to one another with a sealing piece 155.

P To pull the waves of the container walls towards the ship's wall, while at the same time thermal expandability or contractability in the longitudinal direction of the shaft is maintained, are attached to the corrugation backs of the corrugated sheets 151 and 152 in Distances that correspond to those of the stringers, brackets 155 welded on. Each bracket 155 substantially forms a Piece of a U-shaped channel in which the free leg edges 156 are bent inward and in grooves 157 of Engage blocks 158 made of a strong insulating material such as Tufnol. The other end of each of the blocks 158 is designed as a spring 159, which can be inserted with a sliding fit between two right-angled rails 160,

. which in turn in the direction of the frame of the hull run and on the ship's wall by means of U-shaped elbows 161, which are connected to one another by horizontal end plates 162. The end plates 162 are both welded to the U-shaped elbows 161 and to the hull structure 163 of the ship. Blocks 158 are fastened by means of screws 164 which protrude into the pedestal part of the blocks and which are fastened via washers 165 on the back of the rails 160. By horizontal Ansehläge 166, which is attached to the two rails 160 on the Bottom of each block 158 are welded, the blocks 158 are prevented from being under the weight of the through

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the panels 151 and 152 formed wall sections downwards to move.

When the container is filled, its contents exert an outward pressure on the walls, which form the base surface the clamps 155 in close contact with the face 167 of each block 158. During the filling you can again the container walls pull together unhindered in the longitudinal direction of the waves, since the brackets 155 allow a relative displacement to the blocks 158 in this direction. The postponement is supported by the self-lubricating properties of the block material. Relative shifts in the rest On the other hand, directions are determined by the interlocking of the brackets 155 and blocks 158 prevented.

If safety regulations on the container require double protection against leakage, the container can have a In Figures 15 and 16 with the reference numeral 171 lining obtained. The lining 171 can be made of 9 $ *> igem Are made of nickel steel and have a thickness of about 1.6 mm. The sheet metal edges of the individual lining sections can be connected to one another as well as with the container walls 151 and 152 by the connection 172 shown in detail in FIG. 16 to one another be connected. In this connection it is provided that a cross-sectionally cranked strip 173 of 9 $ igem Nickel steel extends the full length of the panels 151 or 152 of the container walls and with them, for example is connected by spot welding. One edge area 174 of a liner section is folded over on itself at 175 and the sheet metal fold thus produced is under the crank of the strip 173 inserted and held thereby. The remaining free edge 176 is bent so that it lowers

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right to the adjacent wall 151 or 152. The adjacent edge area 177 of the next following lining section 178 then becomes the outside of the cranked strip and the protruding portion of the liner section molded on ο The free edges 176 and 177 are then connected to one another by a continuous resistance welding at 179 tied together. At least two weld seams are preferably made.

With this construction, reliable liquid-tightness is obtained Connections of the liner sections 174 and 178 to each other and to the wall portions 152 of the container. These Connection points are preferably placed in the depressions of the shafts to avoid the risk of damage during reduce the transport of prefabricated wall sections as much as possible. The majority of the lining is expediently already used during the prefabrication of the prefabricated wall sections 171 attached to it, so that it is only necessary when installing it in the ship via the connection points 154 extending lining sections 178 'to be attached «

The drawings show a preferred waveform where flat surfaces are connected to one another by relatively sharp kinks or edges.

The end walls can be supported against sloshing of the container contents in rough seas on bulkheads in the ship. This is done by screws or tie rods that are connected to the horizontal support 25 with play, which in the Contraction of the container due to the drop in temperature is full is consumed. If the container is empty and is on

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Ambient temperature, then the forces acting on the end walls in rough seas are considerably lower and can be absorbed by the rigidity of the end walls and the cross members arranged on them alone.

109849/1331

Claims (1)

Patent (protection) claims 1.) Transport containers in ships for cryogenic liquids, in particular liquefied gas, characterized in that each container wall is corrugated so that the corrugations in run in the same direction, the waves of the end walls (7, 107) being vertical and the waves of the other walls extend in the longitudinal direction of the ship, and that the side walls (3, 103) on the ship's wall by sliding connections (48, 50; 111, 114; 155, 158) are attached, which is a relative shift allow in the longitudinal direction of the shaft. 2. Transport container according to claim 1, characterized in that the end sections of the top wall (2) have a resilient Have deformability to absorb the thermal expansion of the end walls (7) connected thereto, while the remaining part of the top wall (2) is prevented from shifting. 3 «Transport container according to claim 1 or 2, characterized in that that between the hull structure of the ship and the container walls support elements (48, 114, 158) are arranged which allow a sliding displacement of the container walls in the longitudinal direction of the shaft. 4. Transport container according to claim 3, characterized in that the support elements are designed as consoles (114) with protruding areas (118, 119) in the wave depressions protrude " 1 098 Λ 9/1331 c Transport container according to claim 3 or 4, characterized in that that between the support elements (114, 158) and rails or edges extending in the longitudinal direction of the shaft (111) there is a form-fitting connection that is displaceable in the longitudinal direction of the shaft. 6. Transport container according to one or more of claims 3 to 5 »characterized in that the container facing away Ends of the support elements (114-, 158) sliding in guide elements attached to the ship structure (123, 160). 7 · Transport container according to one or more of the claims 1 to 6, characterized in that the corrugated container walls are constructed from extruded profiled sheets (8, 107) are, which have a directly molded, a widened head at the free edge rail or rib (10, 111). 8. Transport container according to one or more of the claims 1 to 6, characterized in that the corrugated container walls consist of rolled profiles (151, 152) to which Connection elements (155) are welded on from the outside. 9. Transport container according to one or more of claims 1 to 8, characterized in that the end walls (7, 107) are stiffened by transverse girders (25), which are connected to one another via tie rods (41) extending through the container. 109849/1 331 10. Transport container according to one or more of claims 1 to 9, characterized in that two against each other inclined side wall sections (101, 103, Figure 12), the waves of which run in the same direction, over a curved Wall section (105), the waves of which also run in the same direction, are connected to one another and connect tangentially to the curved wall section (105). β transport container according to claim 10, characterized in that that the wall section (105) is slidably supported by consoles (114) which in turn are in with the Guides (123) connected to the hull are displaceable are held. 12 «, transport container according to claim 8, characterized in that that the connecting elements are U-shaped brackets (155) in cross-section, their mutually bent Leg ends (156) protrude into grooves (157) of support blocks (158). 13. Transport container according to one or more of claims 1 to 12, characterized in that the waves of the container walls have flat back surfaces, which are adjoined by essentially flat, inclined side surfaces. 14. Transport container according to one or more of claims 1 to 13, characterized in that the container interior a lining (171), which at the connection points of its individual sections at the same time with the container walls connected is" 1 0 9 8 Λ 9/1331 15 · Transport container according to claim 14, characterized in that a clamping strip (173) is attached to the inner container wall in the longitudinal direction, under which an edge region (174) of the lining (171) bent into a pallet is inserted, while the edge that remains free (176) of the edge region (174, at 179) is welded to the free edge of the next adjoining lining section (178) _e 16 _{O A} method for assembling a transport container according to one of the preceding claims within a ship, characterized in that the hull is first built without a deck beam, that insulating material for the bottom wall of the transport container is placed on the floor of the hold, that prefabricated wall sections of the transport container from above are retracted ago that the transport container is erected and the side walls are drawn to an insulation lying between the ship wall and the container walls and that the deck beams and the ship deck are then drawn in over the container top wall, whereupon the container top wall is attached to the underside of the deck above. 109849/1331 ι ³⁰ · Blank page