Tank container

Abstract

The invention relates to the design of support and fastening elements for the safe transport and storage of liquid cryogenic products. A tank container comprises a shell with a disc-shaped end and an inner vessel arranged within the shell. Between the inner vessel and the shell is a low thermal conductivity support rigidly anchored on one side in a bushing mounted outside the support and rigidly connected to the inner vessel; on the other side, the support freely rests on the outer shell. An assembly for rigidly fixing the inner vessel against longitudinal movement comprises a pin with a lip on one side and a thread on the other, the lip of the pin being arranged and fastened between flanges rigidly connected to each other, wherein one of the flanges is rigidly connected to the inner vessel. Mounted between the flanges and the lip of the pin is a gasket made of a low thermal conductivity material, and the threaded end of the pin has a threaded sleeve fastened thereon, which is rigidly connected to the shell. Technical effects include: increased reliability and robustness of the tank container; better preservation of the state of the cryogenic product by reducing the effects of temperature changes; and increased usable volume of the inner vessel.

Description

TECHNICAL FIELD

[0001] The present invention relates to a device for safe transportation and storage of liquid cryogenic products, including liquefied natural gas, by road / rail and waterway transportation, in particular to the design of support and fastening elements. BACKGROUND

[0002] A tank for liquefied gas is known in the art, which comprises a casing and a container therein, which is supported at the ends by two pairs of low thermal conductivity supports. These supports are arranged at an angle to the vertical axis of the tank. Longitudinal loads of the container in two directions are prevented by a single rigid rod. The rod comprises space hinges at its ends, one of which is fixed to the container, and the other is fixed to the casing. The container is pressed against the supports by spring-loaded stops and is prevented from rotating around the longitudinal axis. The stops are fixed to the container, rest against the casing through an intermediate part, and comprise a key, which is arranged in a longitudinal slot of the intermediate part fixed to the casing. Each support is mounted on the support surface of the container and rests against the intermediate part, which is mounted on the support during installation and is fixed in place on the casing (RU2032848C1, IPC F17C 13 / 08, F17C 3 / 00, published on April 10, 1995).

[0003] The disadvantages of this solution are: the complexity of the design of the supports, the rod and the spring-loaded stops; the complexity of assembly; and the need for additional work after placing the container in the casing, namely forming a weld for welding the support parts. Since the entire weight of the filled container will rest on the support parts, the weld will be subjected to increased loads. In addition, when welding said weld, there is a risk of damaging the low thermal conductivity supports due to the high temperatures present during welding. These disadvantages can also include that the insulation required to move the supports along the surface of the container during thermal expansion does not cover a significant area, which will complicate the installation of the communication system along the length of the container in said area.

[0004] A cryogenic liquid storage is known in the art, which relates to a device for storing and transporting cryogenic products, in particular to the design of support elements for fastening an inner insulated container in a sealed outer shell (casing) of a tank and protecting the inner container from longitudinal movement during transportation of cryogenic products and compensating for thermal deformation (RU2709750C1, IPC F17C 13 / 08, F17C 3 / 00, published on December 19, 2019).

[0005] The disadvantage of the prior art solution is that when a truncated cone is used as a support, the truncated cone is fixed with its small diameter on the cylindrical part of the vessel and with its large diameter on the load-bearing band of the shell, as a result of which a large thermal bridge is formed due to the high thermal conductivity of the metal, and thus the cryogenic product evaporates faster. Additional disadvantages include that when the vessel is filled with cryogenic liquid, the support assembly can deform due to thermal expansion of the vessel material.

[0006] Tank containers are known in the art, which relate to containers for storing and transporting liquids, which can be used for railway, road and waterway transport. Tank containers include a shell and a vessel inside it, which is supported by two pairs of low-thermal-conductivity supports arranged at an angle to the vertical axis of the tank. The assembly for protecting the vessel from transport loads in the longitudinal direction is in the form of a single rigid rod, which includes space hinges at its ends, which is mounted on the central axis of the tank. One space hinge is fixed on the bottom and arranged in a cavity inside the vessel, which communicates with the insulated space of the tank, and the other hinge is fixed on the disc-shaped end of the shell (RU2259312C1, IPC B65D 88 / 12, published on August 27, 2005).

[0007] The disadvantages of the prior art solution, which is the prototype of the invention, are the complexity of manufacturing the rigid rod, the risk of damage to the material of the low-thermal-conductivity supports when forming the welds for welding the support parts, and the insulation damage that occurs when the supports slide along the inner vessel during thermal expansion. SUMMARY

[0008] The technical problem solved by the invention is to provide a reliable, robust tank container structure with a simplified assembly process.

[0009] The technical effect achieved by the invention is to increase the reliability and robustness of the tank container, to better maintain the state of the cryogenic product by reducing the effect of temperature changes, and to increase the usable volume of the inner vessel.

[0010] According to the first variant, the technical effect of the invention is achieved by providing a tank container, which includes:

[0011] - a shell having a disc-shaped end;

[0012] - an inner vessel arranged inside the shell, wherein between the inner vessel and the shell low-thermal-conductivity supports are arranged, which supports are arranged at an angle to the vertical axis of the tank container at the end of the tank container;

[0013] - an assembly for rigidly fixing the inner container against longitudinal movement, said assembly being arranged on opposite end sides of the inner container and connecting the inner container to the disc-shaped end of the shell;

[0014] - a tensioning assembly that limits the displacement of the inner container, wherein the tensioning assembly is arranged at the end of the tank container, on both sides, each tensioning assembly being connected to the shell on one side and to the inner container on the other side,

[0015] According to a first variant of the invention,

[0016] On one side, the support is rigidly anchored in a bushing on one side, said bushing being mounted outside the support and rigidly connected to the inner container, and on the other side, the support is free to rest on the outer shell, thus allowing the support to slide along the inner surface of the outer shell;

[0017] The assembly for rigidly fixing the inner container against longitudinal movement comprises a pin having a lip on one side and a thread on the other side, the lip of the pin being arranged and fastened between flanges rigidly connected to each other, wherein one of the flanges is rigidly connected to the inner container;

[0018] A gasket made of a low thermal conductivity material is mounted between the flanges and the lip of the pin, and a threaded sleeve is fastened on the threaded end of the pin and rigidly connected to the shell.

[0019] The support can be fixed in the bushing by screws.

[0020] The gasket arranged on each side of the lip of the pin can be made of a glass fiber laminate.

[0021] The support can be arranged symmetrically with respect to the vertical axis of the tank container at the end of the tank container, between the shell and the inner container.

[0022] One of the flanges of the rigid fixing assembly can be connected to the inner container by welding.

[0023] The technical effect of the invention according to the second variant is achieved by providing a tank container comprising:

[0024] - a shell having a disc-shaped end;

[0025] - an inner container arranged inside the shell, wherein a low thermal conductivity support is arranged between the inner container and the shell, the support being arranged at the end of the tank container at an angle to the vertical axis of the tank container;

[0026] - an assembly for rigidly fixing the inner container against longitudinal movement, the assembly being arranged on opposite end sides of the inner container and connecting the inner container to the disc-shaped end of the shell;

[0027] - a tensioning assembly limiting displacement of the inner container, wherein the tensioning assembly is arranged at the end of the tank container, on both sides, each tensioning assembly being connected on one side to the shell and on the other side to the inner container,

[0028] According to a second variant of the application,

[0029] The assembly for rigidly fixing the inner container against longitudinal movement comprises a pin having a lip on one side and a thread on the other side, the lip of the pin being arranged and fastened between flanges rigidly connected to each other, wherein one of the flanges is rigidly connected to the inner container;

[0030] A gasket made of a low thermal conductivity material is mounted between the flanges and the lip of the pin;

[0031] A threaded sleeve is fastened to the threaded end of the pin and is rigidly connected to the shell, wherein each tensioning assembly comprises an eyelet rigidly fastened to a reinforcing element;

[0032] The eyelet is coupled via a kinematic link to the end of a bolt configured to move longitudinally;

[0033] The reinforcing element is dome-shaped, wherein the dome extends into the inner cavity of the inner container through an opening formed in the inner container, wherein the reinforcing element is rigidly and sealingly connected to the inner container and the eyelet is attached to the inner surface of the reinforcing element, wherein a spring is arranged on the other free end of the bolt, between limiters, wherein the upper limiter is fixedly fixed relative to the shell and the lower limiter is fixed relative to the bolt to allow them to move together.

[0034] The reinforcing element can have a hemispherical shape.

[0035] The tensioning assemblies can be arranged symmetrically relative to the vertical axis of the tank container.

[0036] The reinforcing element can be dome-shaped, the cross-section of which can be circular.

[0037] The cross-section of the reinforcing element in the form of a dome can have an elliptical shape.

[0038] The upper limiter can be in the form of a washer.

[0039] The tensioning assembly can comprise an additional washer mounted between the upper washer and the spring, wherein a gasket made of a low thermal conductivity material is arranged between the washers.

[0040] The gasket arranged between the washers in the tensioning assembly can be made of a glass fiber laminate.

[0041] The limiter can be in the form of a stop rigidly connected to the housing and mounted in a groove in the washer arranged above the spring and below the stop.

[0042] The tensioning assembly can comprise an additional washer mounted between the upper washer and the spring, wherein the gasket made of a low thermal conductivity material is arranged between the washers.

[0043] The gasket arranged between the washers in the tensioning assembly can be made of a glass fiber laminate.

[0044] In the tensioning assembly, the eyelet can be attached to the reinforcing element by welding.

[0045] In the tensioning assembly, the reinforcing element can be connected to the inner container by welding.

[0046] The kinematic link can be in the form of a ring.

[0047] The kinematic link can be in the form of a free-form ring.

[0048] The kinematic link can be in the form of an elliptical ring.

[0049] The kinematic link can be in the form of an irregularly shaped ring.

[0050] The tensioning assembly can be partially housed within a socket rigidly connected to the housing, wherein the inner cavity of the socket communicates with the cavity between the housing and the inner container.

[0051] The limiter can be in the form of a stop rigidly connected to the socket and mounted in a groove in the washer arranged above the spring and below the stop.

[0052] The socket can be connected to the housing by welding.

[0053] The stop can be connected to the socket by welding.

[0054] The spring can be a disc spring.

[0055] The spring can be in the form of a set of disc springs.

[0056] The free end of the bolt can be provided with a sleeve, which is freely arranged on the bolt between the outer surface of the bolt and the spring, arranged above the lower limiter, to act as a guide for the spring.

[0057] The lower limiter can be in the form of a washer, which is fixed with respect to the bolt by means of a nut.

[0058] The lower limiter can be rigidly coupled to the sleeve of the tensioning assembly.

[0059] The lower limiter can be rigidly coupled to the sleeve of the tensioning assembly by means of welding.

[0060] The upper limiter can be in the form of a washer, which is rigidly fixed with respect to the socket.

[0061] The upper limiter can be in the form of a stop, which is rigidly connected to the socket.

[0062] The upper limiter can be in the form of a stop, which is rigidly connected to the socket by means of welding. BRIEF DESCRIPTION OF DRAWINGS

[0063] The application according to a first variant is shown in the attached drawings.

[0064] Figure 1 A general perspective view of a container is shown.

[0065] Figure 2 A front view of a tank container is shown.

[0066] Figure 3 A cross-sectional view taken along the line A-A of Figure 2 , which represents a cross-section at the area of the tank container where the support is arranged and illustrates the arrangement of the support and the tensioning assembly.

[0067] Figure 4 Detail B of Figure 2 is shown, which shows the assembly for rigidly fixing the inner container.

[0068] Figure 5 A cross-sectional view of the support arranged between the housing and the inner container is shown.

[0069] The application according to a second variant is shown in Figure 1 , Figure 2 , Figure 3 and inFigure 6 、 Figure 7 and Figure 8 are shown in the additional figures shown in:

[0070] Figure 6 a tensioning assembly is shown.

[0071] Figure 7 a cross-sectional view taken along the line E-E is shown. Figure 6

[0072] Figure 8 a perspective view of the tensioning assembly is shown.

[0073] Reference signs in the drawings:

[0074] 1 - housing,

[0075] 2 - disc-shaped end,

[0076] 3 - end frame,

[0077] 4 - transition carrier shell,

[0078] 5 - rib,

[0079] 6 - inner container,

[0080] 7 - multilayer thermal insulation material,

[0081] 8 - support,

[0082] 9 - tensioning assembly,

[0083] 10 - space between the housing 1 and the inner container 6,

[0084] 11 - fitting compartment,

[0085] 12 - threaded pin,

[0086] 13 - threaded sleeve,

[0087] 14 and 15 - flanges,

[0088] 16 and 17 - gaskets made of low thermal conductivity material,

[0089] 18 - reinforcing element,

[0090] 19 - eyelet,

[0091] 20 - kinematic link formed by a ring,

[0092] 21 - bolt,

[0093] 22 - disc spring, ​

[0094] 23 - stop,

[0095] 24 - bushing,

[0096] 25 - screw,

[0097] 26 and 27 - set of washers,

[0098] 28 - gasket,

[0099] 29 - stop sleeve,

[0100] 30 - set of nuts,

[0101] 31 - end guide,

[0102] 32 - lip,

[0103] 33 - socket,

[0104] 34 - plug,

[0105] 35 - lower limiter. DETAILED DESCRIPTION

[0106] The tank container of the first variant comprises a shell 1 with a disc-shaped end 2. The tank container further comprises an inner vessel 6 arranged within the shell 1. The space 10 between the shell 1 and the inner vessel 6 is filled with vacuum. The installed cut-off and safety fittings of the tank container are arranged in a fitting compartment 11. Low thermal conductivity supports 8 are arranged between the inner vessel 6 and the shell 1 at the end of the tank container at an angle to the vertical axis of the tank container. The disc-shaped end 2 is rigidly fixed to two end frames 3 by a transition load-bearing shell 4 reinforced with ribs 5. The inner vessel 6 is provided with a multi-layer thermal insulation 7. The tank container of the first variant comprises an assembly for rigidly fixing the inner vessel against longitudinal movement, arranged on opposite end sides of the inner vessel 6 and connecting the inner vessel 6 to the disc-shaped end of the shell 1, the tank container of the first variant having a tensioning assembly limiting displacement of the inner vessel 6, wherein the tensioning assembly is arranged at the end of the tank container, on both sides, each tensioning assembly being connected on one side to the shell 1 and on the other side to the inner vessel 6. The supports 8 are rigidly anchored in bushings 24 on one side, said bushings 24 being mounted on the outside of the supports 8 and rigidly connected to the inner vessel 6. On the other side, the supports 8 are free to rest against the outer shell 1, thus allowing them to slide along the inner surface of the outer shell 1. The supports 8 are fixed in the bushings 24 by screws 25. The supports 8 are arranged symmetrically with respect to the vertical axis of the tank container at the end of the tank container between the shell 1 and the inner vessel 6.

[0107] The symmetrical arrangement of the support 8 with respect to the vertical axis of the tank container provides a symmetrical, uniform load distribution on the shell 1 and the inner container 6, thus reducing the risk of deformation of the support during operation.

[0108] Thanks to the operation of the tensioning assembly, which in the first variant of the invention acts in a traditional way by preventing the vertical displacement of the inner container, for example as in similar prior art solutions, the inner container 6 is continuously pressed against the inner surface of the shell 1.

[0109] The support 8 rests freely on the inner surface of the shell 1, which allows the support 8 to slide along the inner surface of the shell in the event of potential changes in the size of the shell caused by fluctuations in the ambient temperature (so-called thermal expansion of the structural elements). This allows to prevent deformation of the shell and the inner container, while ensuring that the inner container 6 rests continuously on the shell 1 to ensure the stability of the inner container and prevent the inner container from overturning.

[0110] Each assembly for rigidly fixing the inner container 6 to prevent longitudinal movement Figure 3 , Figure 4 ) includes a pin 12 having a lip 32 on one side and a thread on the other side. The lip 32 of the pin 12 is arranged and fastened between the flange 14 and the flange 15, which are rigidly connected to each other. The flange 14 is rigidly connected to the inner container 6 by welding. This provides a rigid attachment of the pin 12 to the inner container 6. Between the flange 14 and the flange 15 and the lip 32, a washer 16 and a washer 17 are installed, which are made of a material with low thermal conductivity, for example from a glass fiber laminate. The threaded end of the pin 12 has a threaded sleeve 13 fastened to it, which is rigidly connected to the shell 1. The connection between the sleeve 13 and the shell 1 can be formed by an end guide (flange) 31. The sleeve 13 is welded to the end guide 31, which in turn is welded into the disc-shaped end 2.

[0111] During assembly, when the inner container 6 is connected to the shell 1 by the rigid fixing assembly on each side of the tank container, the lip 32 of the pin 12 is installed and fixed between the flange 14 and the flange 15, which in turn are rigidly connected to each other, for example by bolting. From the other side, the threaded sleeve 13 welded to the end guide 31 is screwed onto the pin 12, and then the sleeve 13 is welded into the disc-shaped end 2 of the shell 1. The washers 16 and 17 are installed to eliminate the occurrence of thermal bridges.

[0112] The rigid fixing assembly has a simple structure and provides a reliable connection between the inner container 6 and the shell 1. In addition, the structure of the rigid fixing assembly facilitates the prevention of longitudinal movement of the container 6 and eliminates the risk of overturning of the container 6 during transportation of cryogenic products.

[0113] The rigid fixing assembly allows the fixing connection between the shell 1 and the inner container 6 with a pin 12 of any length, limited only by the distance between the container 6 and the shell 1 necessary to ensure the proper insulation of the inner container, with the result that this allows to increase the inner volume of the container 6 to the maximum possible value, while complying with the technical requirements. In this case, the structure of the rigid fixing assembly does not significantly affect the choice of the distance between the shell 1 and the container 6.

[0114] The operation of the present invention according to the first variant is as follows. After the inner container 6, assembled with the support 8, is installed in the shell 1, the container 6 is fixed using the tensioner 9. After the welding of the disc-shaped end 2, the pin 12 is fixed coaxially with the disc-shaped end 2 between the flanges 14 and 15. Then, the end guide 31 is welded into the disc-shaped end 2 and the threaded sleeve 13 is screwed onto the pin 12 through the opening in the end guide 31 to abut against the stop and a closed welding of the threaded sleeve 13 to the end guide 31 is performed. In addition, the stroke of the disc spring 22 compensates for the reduction in the diameter of the inner container 6 under the influence of the cryogenic liquid. During the transport of the cryogenic product, the inner container 6 is continuously pressed against the shell 1 by means of the tensioning assembly through the support 8. In the case of thermal expansion of the shell 1, the shell can expand unhindered, while the support 8 slides relative to the shell 1 without losing the tight contact with the shell. This completely eliminates the risk of deformation of the shell 1 caused by the stresses generated at the joint between the shell and the support.

[0115] Therefore, the advantages of the present invention according to the first variant compared to the closest prior art analogues are: the lack of a closed seam under load in the structure of the support made of a material with low thermal conductivity, thus preventing damage to it during welding and preventing the appearance of a load concentration area that directly affects the reliability of the structure. Another advantage of the use of the described assembly to fix the container is the absence of a thermal bridge, achieved by eliminating direct contact with a material with high thermal conductivity between the container and the shell, thus eliminating the flow of heat into the cryogenic liquid. The thermal bridge is a part of the outer surface of the structure through which more heat is transferred to the inside than through the rest of the structure. The presence of a thermal bridge in any such structure leads to an increase in the temperature inside the container. In addition, the operating performance of the tank container is improved, the technical assembly process of the device is simplified, and the process of manufacturing the support and fastening elements takes less time. The present solution also provides the minimum gap between the container and the shell and thus the maximum available container volume in the tank container.

[0116] The tank container according to the second variant is characterized by a special arrangement of the tensioning assembly, in which the rigid fixing assembly is the same as those described for the tank container according to the first variant.

[0117] Similar to the tank container of the first variant, the tank container of the second variant comprises a shell 1 with a disc-shaped end 2. The tank container further comprises an inner vessel 6 arranged within the shell 1. The space 10 between the shell 1 and the inner vessel 6 is filled with vacuum. The installed cut-off and safety fittings of the tank container are arranged in a fitting compartment 11. Low thermal conductivity supports 8 are arranged between the inner vessel 6 and the shell 1 at the end of the tank container at an angle to the vertical axis of the tank container. The disc-shaped end 2 is rigidly fixed to the two end frames 3 by means of a transition load-bearing shell 4 reinforced with ribs 5. The inner vessel 6 is provided with a multi-layer thermal insulation 7. The tank container of the second variant comprises an assembly for rigidly fixing the inner vessel against longitudinal movement, which design is similar to the one described for the tank container of the first variant.

[0118] Each tensioning assembly in the tank container of the second variant Figure 3 , Figure 6 comprises an eyelet 19 rigidly fixed to the reinforcing element 18, for example by welding. The eyelet 19 is coupled via a kinematic link 20 to the end of a bolt 21 configured to move longitudinally. The reinforcing element 18 is dome-shaped, wherein the dome extends into the inner cavity of the inner vessel 6 through an opening formed in the inner vessel 6. The reinforcing element 18 is rigidly and sealingly connected to the inner vessel 6, for example by welding. The reinforcing element 18 prevents deformation of the inner vessel 6 in the case of dynamic loads, since the dynamic loads will impact the reinforcing element 18 primarily (as opposed to the closest prior art analogues, in which the dynamic loads from the tensioning assembly directly impact the inner vessel, which leads to deformation of the inner vessel). The reinforcing element 18 is dome-shaped due to the need for more even distribution of the load from the tensioning assembly to the inner vessel, which reduces the concentration of stresses on small areas of the vessel 6 (unlike the closest prior art analogues). The eyelet 19 is fixed to the inner surface of the reinforcing element 18. On the other free end of the bolt 21, a disc spring 22 is arranged between limiters, wherein the upper limiter is fixedly fixed relative to the shell 1, while the lower limiter is fixed relative to the bolt 21, thus allowing them to move together. The reinforcing element 18 has a hemispherical shape. The tensioning assemblies are arranged symmetrically relative to the vertical axis of the tank container to ensure reliable and balanced positioning of the inner vessel 6, thus eliminating the risk of overturning. The cross-section of the dome-shaped reinforcing element 18 is circular or elliptical in shape. The upper limiter can be in the form of a washer. In the particular case shown, the limiter is in the form of a stop 23. Figure 6 Figure 6 ​The upper washer 26 is shown fixedly fixed with respect to the shell 1 by means of a stop 23 rigidly connected to the shell 1 and mounted in a slot of the upper washer 26. The method for fixing the upper limiter with respect to the shell 1 is determined by considerations of utility and manufacturability, but all the methods for fixing the upper limiter described in the invention according to the second variant provide a reliable attachment and fixing of the position of the upper limiter with respect to the shell 1. The tensioning assembly comprises an additional washer 27 mounted between the upper washer 26 and the coil spring 22, wherein a gasket 28 made of a material with low thermal conductivity, for example made of a glass fiber laminate, is arranged between the washers. The gasket 28 prevents the freezing of the inner cavity between the shell 1 and the inner container 6 in cold seasons. The cold can pass through the eyelet 19, the kinematic link 20, the bolt 21, the nut 30, the coil spring 22 and the washer 27. The kinematic link 20 is in the form of a ring. The kinematic link 20 can be in the form of a free-form ring (for example, oval or irregular shape). The shape of the ring is largely unimportant and it only has to ensure that the kinematic link 20 can cover the eyelet 19 and be freely attached to it. It is advisable (from the point of view of ensuring the manufacturability of the structure) to partially house the tensioning assembly inside a socket 33 rigidly connected to the shell, for example by welding, while the inner cavity of the socket 33 communicates with the cavity between the shell 1 and the inner container 6. Thus, by connecting the stop 23 to the socket 33 (for example by welding), it is convenient to fix the stop 23 with respect to the shell 1. The coil spring 22 can be in the form of a coil spring or a group of coil springs, which allows the spring assembly to be formed from standard coil springs according to the calculated load. The free end of the bolt 21 can be provided with a sleeve 29 freely arranged between the outer surface of the bolt 21 and the coil spring 22 above the lower limiter 35. The sleeve 29 acts as a guide for the coil spring 22, thus providing a more precise and predictable movement of the coil spring 22. The lower limiter 35 is in the form of a washer fixed with respect to the bolt 21 with a nut 30 (or a group of nuts). The lower limiter 35 can be rigidly connected to the sleeve of the tensioning assembly, for example by welding. The tensioning assembly is partially housed inside a socket 33 rigidly connected to the shell, wherein the inner cavity of the socket communicates with the cavity between the shell and the inner container. The rigid connection between the stop 23 and the shell 1 is provided by the rigid connection (for example by welding) between the stop 23 and the socket 33.

[0119] The tank container of the second variant operates similarly to the invention of the first variant, and the claimed technical effect is achieved by characterizing a set of features of the rigid fixing assembly and the tensioning assembly.

[0120] The reinforcement element 18 is welded through the opening into the container 6 so that the dome of the reinforcement element 18 is housed in the inner cavity of the container 6. The eyelet 19 is welded to the inner surface of the reinforcement element 18. The kinematic link 20 is inserted into the opening of the eyelet 19 and then bent until it touches the end face and is welded. After the inner container 6 has been rolled into the shell 1, the bolt 21 is placed on the kinematic link 20 through the socket 33, then a set of washers 26 and 27 is installed, with a gasket 28 made of low thermal conductivity material (for example, a glass fiber laminate) arranged between the set of washers 26 and 27, the upper washer 26 abutting against the stop 23, which is placed in the groove of the upper washer 26. Next, the set of coil springs 22 is installed, the springs are pressed upwards and fixed using the guide sleeve 29, the lower edge of which is provided with a lower limiter 35, then the nut 30 is tightened. Then, a closing seam is formed for welding the socket plug (not shown in the figures) to the socket 33. Due to the action of the coil springs 22 and the bolt 21, the inner container 6 is continuously pressed against the inner surface of the shell 1 by the support 8, thereby preventing the container 6 from overturning. The stroke of the coil springs 22 compensates for the decrease in the diameter of the inner container 6 under the influence of the cryogenic liquid.

[0121] The tensioning assemblies of the invention according to the second variant are easy to operate, as they provide simple assembly and thus simplified maintenance. During assembly of the tensioning assembly and during maintenance, all elements of the tensioning assembly are conveniently accessible.

[0122] The tensioning assemblies of the invention according to the second variant prevent vertical movement and axial rotation of the inner container and prevent the container from overturning during delivery of the liquid cryogenic product. Axial rotation of the inner container is prevented (together with the vertical movement in the closest prior art analogue) by providing a more rigid tensioning assembly, as the single ring connected to the bolt 21 and the eyelet 19 acts as a kinematic link 20, thereby eliminating the need for a long chain (as in the closest prior art analogue) and thus providing a softer kinematic connection.

[0123] In the tank container structure of the second variant, the thermal bridge is also eliminated.

[0124] In the invention according to the second variant, the reliability of the structure is ensured due to the fact that the tensioning assembly is connected to the inner container through the dome-shaped reinforcement element 18, which significantly reduces the risk of deformation of the container 6 under dynamic loads, firstly, due to the greater stiffness of the element 18 compared to the stiffness of the container 6, and secondly, due to the elimination of small-area stresses in the container 6 at its interface with the tensioning assembly, as the dome-shaped reinforcement element allows stress to be redistributed over a larger area, thus reducing the likelihood of deformation of the container 6 during operation.

[0125] The structure of the tensioner assembly does not require a separate increase in the distance between the casing 1 and the container 6, since the insulation distance will be determined only by the technical requirements (considering the rigid fixing assembly used here), which allows the available volume of the container 6 to be maximized.

[0126] Therefore, the present application according to the two variants increases the reliability and robustness of the tank container, better preserving the state of the cryogenic product by reducing the effects of temperature variations, and increases the available volume of the internal container.

[0127] The technical documentation of the tank container claimed in the two variants uses different features.

Claims

1. A tank container comprising: - a shell having disc-shaped ends; - an inner container arranged inside the shell, wherein a low thermal conductivity support is arranged between the inner container and the shell, the support being arranged at an angle to the vertical axis of the tank container at the ends of the tank container; - an assembly for rigidly fixing the inner container against longitudinal movement, the assembly being arranged on opposite end sides of the inner container and connecting the inner container to the disc-shaped ends of the shell; - a tensioning assembly which limits the displacement of the inner container, wherein the tensioning assembly is arranged at the ends of the tank container, on both sides, each tensioning assembly being connected to the shell on one side and to the inner container on the other side, characterized in that, on one side, the support is rigidly anchored in a bushing on one side, the bushing being mounted outside the support and rigidly connected to the inner container, and on the other side, the support is free against the shell, thereby allowing the support to slide along the inner surface of the shell; the assembly for rigidly fixing the inner container against longitudinal movement comprises a pin having a lip on one side and a thread on the other side, the lip of the pin being arranged and fastened between flanges which are rigidly connected to each other, wherein one of the flanges is rigidly connected to the inner container; a gasket made of a low thermal conductivity material is mounted between the flanges and the lip of the pin; and a threaded sleeve is fastened on the threaded end of the pin and is rigidly connected to the shell.

2. A tank container according to claim 1, characterized in that The support is fixed in the bushing by means of a screw.

3. A tank container according to claim 1, characterized in that The gaskets arranged on each side of the lip of the pin are made of a glass fiber laminate.

4. A tank container according to claim 1, characterized in that The support is arranged at the ends of the tank container symmetrically with respect to the vertical axis of the tank container, between the shell and the inner container.

5. A tank container according to claim 1, characterized in that One of the flanges of the assembly for rigidly fixing the inner container against longitudinal movement is connected to the inner container by welding.

6. A tank container comprising: - a shell having disc-shaped ends; - an inner container arranged inside the shell, wherein a low thermal conductivity support is arranged between the inner container and the shell, the support being arranged at an angle to the vertical axis of the tank container at the ends of the tank container, - an assembly for rigidly fixing the inner container against longitudinal movement, the assembly being arranged on opposite end sides of the inner container and connecting the inner container to the disc-shaped ends of the shell; - a tensioning assembly which limits the displacement of the inner container, wherein the tensioning assembly is arranged at the ends of the tank container, on both sides, each tensioning assembly being connected to the shell on one side and to the inner container on the other side, characterized in that, on one side, the support is rigidly anchored in a bushing on one side, the bushing being mounted outside the support and rigidly connected to the inner container, and on the other side, the support is free against the shell, thereby allowing the support to slide along the inner surface of the shell; the assembly for rigidly fixing the inner container against longitudinal movement comprises a pin having a lip on one side and a thread on the other side, the lip of the pin being arranged and fastened between flanges which are rigidly connected to each other, wherein one of the flanges is rigidly connected to the inner container; a gasket made of a low thermal conductivity material is mounted between the flanges and the lip of the pin; and a threaded sleeve is fastened on the threaded end of the pin and is rigidly connected to the shell. The assembly for rigidly fixing the inner container against longitudinal movement comprises a pin having a lip on one side and a thread on the other side, the lip of the pin being disposed and fastened between flanges rigidly connected to each other, wherein one of the flanges is rigidly connected to the inner container; A gasket made of a material with low thermal conductivity is mounted between the flanges and the lip of the pin; A threaded sleeve is fastened at the threaded end of the pin and is rigidly connected to the housing, wherein each tensioning assembly comprises an eyelet rigidly fixed to a reinforcing element; The eyelet is coupled to the end of a bolt via a kinematic link, which bolt is configured to move longitudinally; The reinforcing element is dome-shaped, wherein the dome extends into the inner cavity of the inner container through an opening formed in the inner container, wherein the reinforcing element is rigidly and sealingly connected to the inner container and the eyelet is attached to the inner surface of the reinforcing element, wherein a spring is arranged on the other free end of the bolt, between limiters, wherein the upper limiter is fixedly fixed relative to the housing and the lower limiter is fixed relative to the bolt, allowing them to move together.

7. A tank container according to claim 6, characterized in that The reinforcing element has a semi-spherical shape.

8. A tank container according to claim 6, characterized in that The tensioning assemblies are arranged symmetrically relative to the vertical axis of the tank container.

9. A tank container according to claim 6, characterized in that The cross-section of the dome-shaped reinforcing element has a circular shape.

10. A tank container according to claim 6, characterized in that The cross-section of the dome-shaped reinforcing element is elliptical.

11. A tank container according to claim 6, characterized in that The upper limiter is in the form of an upper washer.

12. A tank container according to claim 11, characterized in that The tensioning assembly comprises an additional washer mounted between the upper washer and the spring, wherein a gasket made of a material with low thermal conductivity is arranged between the upper washer and the additional washer.

13. A tank container according to claim 12, characterized in that The gasket arranged between the upper washer and the additional washer in the tensioning assembly is made of a glass-fiber laminate.

14. A tank container according to claim 6, characterized in that The limiter is in the form of a stop rigidly connected to the housing and mounted in a groove in the upper washer arranged above the spring and below the stop.

15. A tank container according to claim 14, characterized in that The tensioning assembly comprises an additional washer mounted between the upper washer and the spring, wherein a gasket made of a material with low thermal conductivity is arranged between the upper washer and the additional washer.

16. A tank container according to claim 15, characterized in that The gasket arranged between the upper washer and the additional washer in the tensioning assembly is made of a glass-fiber laminate.

17. A tank container according to claim 6, characterized in that In the tensioning assembly, the eyelet is attached to the reinforcing element by welding.

18. A tank container according to claim 6, characterized in that In the tensioning assembly, the reinforcing element is connected to the inner container by welding.

19. A tank container according to claim 6, characterized in that The kinematic link is in the form of a ring.

20. A tank container according to claim 6, characterized in that The kinematic link is in the form of a free-form ring.

21. A tank container according to claim 6, characterized in that The kinematic link is in the form of an elliptical ring.

22. A tank container according to claim 6, characterized in that The kinematic link is in the form of an irregularly shaped ring.

23. A tank container according to claim 6, characterized in that The tensioning assembly is partially housed within a socket rigidly connected to the housing, wherein the inner cavity of the socket communicates with the cavity between the housing and the inner container.

24. A tank container according to claim 23, characterized in that The limiter is in the form of a stop rigidly connected to the socket and mounted in a groove in the upper washer arranged above the spring and below the stop.

25. A tank container according to claim 23, characterized in that The socket is connected to the housing by welding.

26. A tank container according to claim 24, characterized in that The stop is rigidly connected to the socket.

27. A tank container according to claim 6, characterized in that The spring is in the form of a coil spring.

28. A tank container according to claim 6, characterized in that The spring is in the form of a set of coil springs.

29. A tank container according to claim 6, characterized in that The free end of the bolt is provided with a sleeve which is freely arranged on the bolt between its outer surface and the spring, arranged above the lower limiter, to act as a guide for the spring.

30. A tank container according to claim 6, characterized in that The lower limiter is in the form of a washer which is fixed relative to the bolt with a nut.

31. A tank container according to claim 29, characterized in that The lower limiter is rigidly coupled to the sleeve of the tensioning assembly.

32. A tank container according to claim 31, characterized in that The lower limiter is rigidly coupled to the sleeve of the tensioning assembly by welding.

33. A tank container according to claim 23, characterized in that The upper limiter is in the form of a washer which is rigidly fixed relative to the socket.

34. The tank container according to claim 23, characterized in that The upper limiter is in the form of a stop which is rigidly connected to the socket.

35. A tank container according to claim 34, characterized in that The upper limiter is in the form of a stop which is rigidly connected to the socket by welding.

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