DD281319A7 - STORAGE FOR DOUBLE-WALLED CONTAINERS KRYOGENER MEDIA - Google Patents

Abstract

The invention relates to a storage for double-walled container cryogenic media and is also used for stand tanks and transport containers of Straszen- and rail transport. According to the invention, the bearing is constructed of at least three rings or ring segments, the ends of which are connected to one another in the same way. Depending on whether an asymmetrical or symmetrical design of the maeander was chosen, a ring is used. or his aeuszeren rings attached to the Auszenbehaelter and a ring or its central ring is loosely connected to the inner container in connection. Fig. 3 {Transport container; cryogenic media; Warehouse; Meander}

Description

For this 2 pages drawings

Field of application of the invention

The invention relates to a storage for double-walled containers of cryogenic media and is equally applicable for stand tanks and transport containers of road and rail transport.

Characteristic of the known technical solutions

In terms of their mechanical and thermodynamic properties, hche requirements are placed on the storage of containers of cryogenic media. This is especially true for insulated double-walled transport containers of road and rail vehicles.

Known is the storage system for cryogenic media according to US-PS 4,496,073, according to which an inner container via poorly heat-conducting support rings and a therefore closing intermediate tube, which is supported via further support rings against the inner wall of the outer container, is stored. The heat input into the container can be influenced within certain limits by the choice of the free distance of the support rings. However, it is annoying that the heat-conducting cross sections are rech'i large. In addition, this principle requires a lot of material and space, which has an unfavorable effect on the useful mass-net mass ratio. The assembly of large containers should be associated with considerable difficulties. A specially developed for the transport of cryogenic media storage is described in the DD-WP 26C047. Although this variant meets all requirements for transport containers, which must be made in terms of their thermodynamic and mechanical properties, but this is only achieved by the use of a large number of different components and a relatively complex production and assembly. As a result, the cost of the warehouse a not inconsiderable share of the total cost.

Also known is the use of cones in the annular gap of the double-walled container for receiving radial and axial forces (drawing No. 104-1137-A, AGA-CRYO AB Sweden). The load capacity of such bearings in the radial direction is essentially dependent on the opening angle of the cone and extremely limited at the usual small angles.

Object of the invention

The aim of the invention is to develop a storage for double-walled containers of cryogenic media, which ensures high functional and operational safety, especially of transport containers, with low mass and is inexpensive to manufacture.

Explanation of the essence of the invention

The object of the invention is the development of a warehouse for double-walled containers cryogenic media, which combines excellent thermal insulation properties and hol.β mechanical strength in a small space. The camp should be produced by simple means and easy to install.

According to the invention the object is achieved in that at least three rings or their segments are meandering at their ends connected to each other and that in asymmetric or symmetrical structure of the meander a ring or the outer rings of the meander are attached to the outer container and din ring or the Central ring with the inner container loosely connected.

The construction of a meander is called symmetrical if the meander continues in a uniform, ie mirror-inverted manner, with respect to the ring (central ring, which is loosely connected to the inner container with its free end) two outer rings attached to the outer container, while the other outer ring is in communication with the inner container.

The individual rings of the meander are mutually welded at their ends. This can be done directly or via connectors. However, the invention also encompasses those meanders of the construction described, whose rings do not have to be mutually joined together at their ends, but also those which, due to the nature of the production process, already have coherent rings, ie meanders formed by prototyping (e.g.

Casting, sintering) or forming (e.g., pressing, turning).

The free ends of the rings in communication with the inner container have a convexly curved surface in order to keep the heat-conducting cross section in the storage area as small as possible. The adjoining long meandering Wärmeleitweg leads to a strong temperature gradient, so that the heat flow (heat input) remains extremely small in the cryogenic container. Furthermore, the heat resistance can be increased and the mass of the bearing can be reduced by making the rings of the meander perforated.

To accommodate axial forces, especially in transport containers, a cone with a small opening angle can be provided. But the direct involvement of such a cone in an axial floating bearing is possible. For example, the condenser facing the inner container may be connected to a sliding ring, which is associated with the free end of the central ring.

In asymmetric meander construction, a connection between the cone and the region of the free end of the corresponding ring is also conceivable.

embodiment

The invention is explained in more detail below using an exemplary embodiment and the illustrated figures:

Fig. 1: Cross-section of a double-walled container with an axially fixed and an axially loose storage area

Fig. 2: sectional view of a bearing in the axially fixed storage area

3: sectional view of a bearing in axially loose storage area (with sliding ring)

4: sectional view of a bearing in the axially loose bearing area (without sliding ring)

Fig. 5: Section of a perforated ring

The double-walled container shown in Figure 1 is suitable for the transport of cryogenic media. In the rear bearing area 5, the bearing 7 is axially blocked by the inclusion of the cone 8. This is shown in detail in FIG. 2. In addition, Figure 2 shows the structure of the bearing 6,7 according to the invention, which is made of rings 9,10,11, which are alternately welded together at their ends via connector 13, meander-shaped. This variant represents a symmetrical meandering structure, with the central ring 11 being the symmetrical reference. Its free end is formed as a convex curvature 12 and communicates with the inner container 2 in the storage area 5 in a loose connection. The two outer rings 9 of the bearing 7 are firmly connected to the outer container.

The construction of the bearing 6.7 allows the transmission of large radial forces, while axial forces can be absorbed to a much lesser extent. Therefore, the bearing area 5 must be axially supported by an additional measure. For this purpose, the integration of a cone 8 with a connection angle of preferably 5 ° to 30 ° in a known manner. When operating transport containers for cryogenic media, shrinkage movements occur which can lead to undesired stresses and material seizure in the bearing area of the axial release layer. In a simple way, this can be avoided by a sliding ring 15, which is arranged between the inner container 2 and the free end of the central ring 11 and fixedly connected to a cone 14 which is secured to the outer container (Figure 3).

FIG. 4 shows a bearing with an asymmetric meander structure, in which one of the two rings (ring 9) is always fastened to the outer container, while the other ring 18 is in communication with the inner container 2. The free end of the ring 18 is fixedly connected to the cone 19 or segments of such and increases the stability of the bearing in the axial direction. The thermodynamically good properties of the meander-shaped bearings can be further improved by using perforated rings 16 (FIG. 5) whose perforations have a substantially greater extent in the circumferential direction than in the radial direction. The perforations are arranged in the radial direction before each other, whereby the Wärmeleitquerschnitt the meander is reduced and the Wärmeleitweg is increased. In order to achieve an optimum of thermodynamic and mechanical properties, the consideration of many influencing variables is necessary. An important factor is the geometric shape of the perforations in relation to the webs connecting them. Conveniently appear perforations whose extent in the circumferential direction is at least three times as large as the radial extent, the webs in the circumferential direction at least 25% and in the radial direction at least 5% of the extent of a perforation in the circumferential direction. Also between the perforations of the adjacent rings 9,10,11,18 dislocations are provided so that, for example, a perforation of the ring 9 of the web of the adjacent ring 10 is opposite.

The main advantages of the invention are:

- The camp combines good thermodynamic and mechanical properties.

- The bearing has a space-saving design.

- The bearing is easily adaptable to different load conditions.

- The bearing is easy to produce and easy to install.

Claims (6)

1. Bearing for double-walled containers of cryogenic media using rings or ring segments and cones in transport containers as load-bearing elements, characterized in that at least three rings (9; 10; 11; 18) are connected meandering at their ends, and that in asymmetric or symmetrical structure of the meander of the ring (9) on the outer container (1) is fixed and the Ri. ig (18) and the central ring (11) with the inner container (2) is loosely connected. 2. La-'fir according to claim 1, characterized in that the rings (9; 10; 11; 18) at their ends over .V. ' ider (13) are welded together. 3. Le ₀ * according to claim 1, characterized in that the free end of the central ring (11) and the ring (18) is designed as a convex curvature (12). 4. Bearing according to claim 1, characterized in that the free end of the central flange (11) of an axial movable bearing (6) with the sliding ring (15) of a cone (14) is loosely connected. 5. Bearing according to claim 1, characterized in that the ring (18) of an asymmetrically constructed meander in the region of its free end with a cone (19) is connected. 6. Bearing according to claim 1, characterized in that the rings (9; 10; 11; 18) perforations (17) whose extent in the circumferential direction is at least three times as large as their radial extent and that the perforations (17) in radial Direction are offset from each other, wherein the webs connecting the perforations (17) in the circumferential direction is at least 25% and in the radial direction at least 5% of the extent of a perforation (17) in the circumferential direction.