EP2651783A1

EP2651783A1 - Container arrangement for transporting containers

Info

Publication number: EP2651783A1
Application number: EP11805803.1A
Authority: EP
Inventors: Kevin Tannenberger; Dieter Pfau
Original assignee: WEW Westerwaelder Eisenwerk GmbH
Current assignee: WEW Westerwaelder Eisenwerk GmbH
Priority date: 2010-12-15
Filing date: 2011-12-12
Publication date: 2013-10-23
Also published as: DE102010054585B4; DE102010054585A1; WO2012080180A1

Abstract

The present invention relates to a container arrangement (1) for a transporting container, in particular intermediate bulk containers, having an inner container (4) and an outer container (3), of which the walls run parallel to one another, and at a distance (d) from one another, and are connected to one another via a saddle element (11). The saddle element (11) is arranged between the inner and outer containers (4, 3) and has a limb (13), which runs between the inner and outer containers (4, 3) and butts against the inside of the outer container (3) by way of an outer limb end, and a crosspiece (14), which starts at an inner limb end, runs at right angles to the limb (13) and butts flush against the outside of the inner container (4). A limb-direction component of a force which acts between the inner container (4) and outer container (3), and is transmitted via the saddle element (11), thus gives rise to a higher concentration of stressing in the limb (13), and/or on the wall of the outer container (3) in the region of the limb end, than on the wall of the inner container (4) in the region of the crosspiece (14) and possibly a higher degree of plastic deformation of the outer container (3), and/or of the limb (13), than of the inner container (4).

Description

Container arrangement for transport containers

The present invention relates to a container arrangement for a transport container with an inner container and an outer container whose walls are parallel to each other at a distance (d) and connected to each other via a saddle element.

Container arrangements with inner and outer containers or so-called double-walled containers have long been known in the storage tank area. In this case, an outer container serves as additional protection against leakage of the stored medium (for example, dangerous liquids). There are also transport containers for dangerous goods, which are designed with double-walled containers in order to obtain operating licenses as a transport and as a storage container. In the known double-walled containers, e.g. for tank containers, an inner container is usually surrounded by a more or less tight-fitting outer jacket, which in turn is then fixed in a container frame. In order to safely and permanently transfer occurring dynamic and static operating loads between inner and outer containers, either the outer container is carried out fitting to the inner container or there are both on the outer and on the inner container large-scale coupling or saddle elements provided to permanently occurring loads without being able to transfer permanent deformations (see eg DE 202 15 657 Ul).

A special feature of the transport containers is the so-called IBCs (intermediate bulk containers) or bulk containers for liquids. In contrast to tank containers (portable tanks), which cover a volume range of 3 to 40 m ³ , these are generally small-volume containers with a volume of up to 3 m ³ . Similar to pallets, IBCs are transport containers to handle with forklifts and other handling equipment. In contrast to tank containers, they are usually not designed as pressure vessels, but are nevertheless suitable for the transport of dangerous goods (with a wide variety of dangerous goods permits for different transport routes). When The basis for approval for IBCs for hazardous liquids is a so-called drop test, in which an IBC with a filled container from a height of approximately 1.50 m strikes a solid surface. The drop test is considered passed if fittings and containers show no leak after the drop test. Many IBCs are made of plastic materials (eg HDPE - High Density Polyethylene), which have a comparatively high plastic deformability. However, such plastics are not suitable for some media, especially not for high-purity substances.

Although metallic materials are in themselves more resistant than plastics, they often do not have their plastic deformability (elongation at break), so overdimensioning is required for brittle materials to pass a drop test, which limits the area of use as a transport container, since a very large empty weight is required , The same applies to containers which have a brittle inner coating (e.g., enamel). If the IBC is also to be used as a storage container, a double-walled version is additionally required. This additionally increases the weight.

Thus, there is the object of providing containers for metallic tank containers which can be classified as IBCs, which can also be used as storage containers - in other words have double-walled construction - and at the same time have the lowest possible dead weight.

This object is achieved by the present invention by providing a specially designed saddle element between the inner and outer container, which has a leg extending between inner and outer container, which abuts with one end on the inside of the outer container and at the opposite inner leg end approximately at right angles to Has connecting leg extending web, which rests flush or flat on the outside of the inner container. This construction allows a shock-absorbing coupling between inner and outer container, which uses the outer container and / or the leg as a plastically deforming "crash element". For example, in a drop test, the forces acting between inner and outer containers are introduced from the inner container over a relatively large area over the web into the legs connecting the two containers. Its leg end acts through, possibly over a relatively small area contact area with high stress concentration on the outer container and deforms this elastic or plastic and thus reduces the impact energy occurring without the inner container is too high stress. The energy can also be wholly or partially cushioned by a deformation of the leg itself (elastic deformation) or degraded (plastic deformation). This means that IBCs for dangerous goods with metallic containers can also be approved as IBCs. Even a relatively brittle inner tank material is not damaged in a case trial to be carried out, and the inner container remains tight, while the outer container or the saddle element is energy-absorbing plastic deformation and does not lose its function as a drip pan.

Embodiments of the present invention will be described with reference to the drawings. Show in it

1 is a schematic side view of a container arrangement according to the invention with an indicated container frame,

2 is a perspective view of the arrangement shown in Fig. 1,

Fig. 3-7 detailed representations (detail Z) different

Embodiments of a saddle element for the container arrangement according to the invention,

8 and 9 is a perspective view of saddle elements with deformation elements,

Fig. 1 0 detailed representations (detail Y) different

Embodiments of a coupling element at the ends of the container assembly according to the invention, and Fig. 1 1 is a longitudinal and cross-sectional view (detail X) of

Mannlochstutzenbereichs a container arrangement according to the invention. In addition to the embodiments described below with reference to the figures, there are still further embodiments of the invention.

In one embodiment, the leg has a deformation element, which is designed as a molding and / or opening. Such a deformation element can be designed, for example, as a bead, bore or perforation and forms a specifically arranged weakening of the leg and for targeted deformation in a specific direction. If the leg serves, for example, as an energy-absorbing compression element, the upsetting shape and also the compression resistance can be made reproducible and thus manageable by means of a correspondingly designed deformation element.

Suitable profiles for the saddle element are, for example, U-profiles, T-profiles or L-profiles. This makes it possible to fall back on a very extensive catalog of standard profiles. However, it is also possible to "tailor" profiles with largely freely selectable geometry (for example, edge profiles which are designed as Z, L or U profiles with deformation elements).

In embodiments in which the wall of the outer container in the region of the leg ends is made thinner than the wall of the inner container, it can be ensured that the desired deformation takes place primarily in the outer container (or in the leg of the saddle element) and not in the inner container that a leakage of the inner container can be largely excluded.

For designs in which the modulus of elasticity, which is a measure of the deformation resistance, is lower (softer material) than the modulus of elasticity of the outer container material, the tendency to deform between the inner and outer container can additionally be varied. There are also tank containers in which the space formed between the inner and outer tanks is flushed by a temperature control, which either cools or heats the load in the inner tank. In order to reduce the risk here of damaging either this heating jacket or even the inner container itself in the region of a manhole nozzle passing through both the outer container and the container, an embodiment with the following features is provided. The neck itself is connected via a surrounding this and the contour of the inner container following collar with the Tnnenbehälter and this collar is in turn connected at its outer edge via a nozzle ring with the edge of the nozzle surrounding the opening with the outer container. About this nozzle ring and the collar of the inner container is practically suspended in the outer container. In the event that such a nozzle is arranged in the apex region, which is usually the case, so here too high impact load causes tensile forces are transmitted via the nozzle ring from the inner container into the outer container and possibly to a deformation in the region of the nozzle surrounding opening in the outer container, without the actual connecting piece, which opens into the inner container, is charged. Also by this measure, the risk is minimized that the inner container in the nozzle area at a shock load shows leaks. A controlled and controlled compression of the saddle element is best realized when this saddle element is in the bottom region of the container, since it can then absorb, transfer or intercept the vertically downward acting on the inner container compressive forces best. Such inner and outer containers are particularly easy to produce, each having a cylindrical portion (so-called "jacket shot"), which is closed at its ends via the end floor. Such containers may be arranged as horizontal or vertical cylinders. In such embodiments, pipe elements are then provided in addition to the saddle element already described, which couple the two containers together in the end soils. These edge elements are also designed so that the stress concentration in the outer container, ie outside ground or in the tubular element, takes place while the stresses on the inner container as low as possible being held. For this purpose, the pipe element is then connected via a voltage applied to the bottom of the inner container flat piece with this.

If the inner and outer containers are circular-cylindrical, then a wrap angle in the sole region of the saddle element, which are then designed as ring segments, has proved successful from 90 to 120 °. An interruption in the sole region of 10 to 20 ° of such a ring-like saddle element ensures that a tempering medium circulating between the inner and outer sheath can be completely emptied without residues remaining in the saddle element region.

Fig. 1 and 2 show a container assembly 1 in a side view in which the visible contours pulled through, dashed invisible edges and a frame arrangement is shown in phantom. The same container arrangement 1 is shown in FIG. 2. The container arrangement 1 comprises an outer container 3, which surrounds an inner container 4 at a distance d; the outer container 3 and the inner container 4 each have a cylindrical tank section 5; 6, which are each closed at their ends with curved bottoms 7, 8. A here designed as a manhole 9 spigot passes through the outer and inner containers 3, 4 and is welded to the inner container 4. The exact structure will be described below. The outer container 3 is connected via a Stirnringsattelung 10 with the frame assembly 2.

The inner container 4 is incorporated over a total of four saddle elements 1 1 with its cylindrical tank section 6 in the cylindrical tank section 5 of the outer container 3. The saddle elements 1 1 are designed as four ring segments with a U-shaped cross section (see Fig. 3), the wrap angle is 90 to 120 °, in the sole region there is a gap of 10 to 20 ° to the free passage or drain of a to ensure in the space 12 circulating tempering. Each saddle element 1 1 has a running between the outside of the inner container 6 and the inside of the outer container 5 leg 13, at its inner container 6 facing end (inner end) an approximately perpendicular to the leg 13 extending web 14 connects. The saddle element 1 1 shown in Fig. 3 is formed as an edged U-profile and has two legs 13, which in each case at their outer container 3 facing ends (outer Leg end) are welded to this. The inner container 6 has a higher wall thickness than the outer container 5.

The materials of outer and Tnnenbehälter 3, 4 may be different and thus have different material properties (modulus, tensile strength, elongation at break, etc.). The material of the inner container 4 is usually matched to the load to be transported in the container arrangement 1. This can be used for the Tnnenbehälter 4 particularly corrosion-resistant materials, while the material quality of the outer container 3 and the saddle elements 1 1 is determined in terms of their mechanical properties.

In the embodiments shown in FIGS. 7, 8 and 9, deformation elements are provided which run as canting or bead 16 in the legs 13 in the case of the saddle element 11g and thus reduce the initial force for a compression of these legs 13. Additional perforations 17 (apertures in the saddle element 1 lh regularly arranged along an upsetting line) can reduce the compression resistance even further. 8 shows a perspective view and an enlarged detail view of the saddle element 1 lh.

FIG. 9 shows further alternatives with perforations 17.

Saddle element I ii carries only a perforation 17 and no edging. The saddle elements 1 1h, 111 have differently shaped perforations 17 '(elongated holes running perpendicular to the edging 16), 17 "(crescent-shaped elongated holes) in conjunction with an edging 16 with which the compression behavior can be varied.

A complementary storage of the inner container 4 in the outer container 3 via trained as a tubular elements coupling elements, which are arranged between the inner and outer floors 8 and 7. In this case, the inner bottom 8 reinforcing base plate 18 is provided, on which the pipe element 19 attaches and extends to the inside of the outer bottom 7 and is welded there. This storage secures the container tank 4 in the outer container along the longitudinal axis 20, but allows for elastic or plastic compression of the saddle elements 1 1 and the cylindrical tank portion 5 of the outer container 3 relative to the longitudinal axis 20 transversely to the longitudinal axis 20, as welded to the outer bottom 7 Pipe member 19 relative to the base plate 1 8 is displaceable. The second alternative in FIG. 9 shows a ring 18 'instead of the base plate 18.

10 shows a manhole assembly in a longitudinal (left side) and a cross-sectional view (right side). The manhole 9 comprises a the inner and outer container 4, 3 passing through nozzle 21, at the upper end of a flange 22 is arranged, which can be closed with a lid (not shown). The nozzle 21 passes through a recess corresponding to the nozzle diameter in the cylindrical tank section 6 of the Tnnenbeh age and is surrounded by a voltage applied to the outside of the inner container 4 collar 23 with a corresponding inner diameter.

In the region of the outer circumference of the collar 23, there is a nozzle ring 24 which is arranged concentrically with the nozzle 21 and passes through an opening in the cylindrical tank section 5 of the outer container, which recess corresponds to the nozzle ring diameter, thus sealing the interspace 12.

In the illustrated embodiment, the nozzle 21 is welded to the collar 23 and the inner container 4, the collar 23 is also welded at its outer edge to the inner container 4 and the nozzle ring is welded to the collar 23 and the outer container 3. Thus, the inner container 4 is suspended via the nozzle ring 24 in the outer container 3 and that on the inner container structure reinforcing collar 23. Thus, if a shock stress to a relative movement between the inner container 4 and outer container 3, so this is about the nozzle ring 24 and the collar 23rd transferred to the inner container 4 and not the actual port 21st As a result, the risk of leakage of the inner container 4 is considerably minimized and thus ensures the crash safety in the manhole section of the container assembly 1.

Other embodiments will be apparent to those skilled in the art within the scope of the appended claims.

Claims

claims

1 . Container arrangement (1) for a transport container, in particular IBC, with an inner container (4) and an outer container (3) whose walls run parallel to each other at a distance (d) and are connected to each other by a saddle element (11), which between the Inner and outer container (4, 3) is arranged, wherein the saddle element (1 1)

a between inner and outer container (4, 3) extending leg (13) which abuts with an outer leg end on the inside of the outer container (3), and

has a web (14) extending at right angles to the leg (13) and engaging flush with the outside of the inner container (4),

such that a force component extending in the leg direction

a between inner container (4) and outer container (3) acting and on the

Saddle element (1 1) transmitted force in the leg (13) and / or

on the wall of the outer container (3) in the region of the leg end causes a higher concentration of stress than on the wall of the inner container (4) in the region of

Bar causes (14) and possibly a higher plastic deformation of the outer container (3) and / or the leg (13) than the inner container (4).

2. Container arrangement (1) according to claim 1, wherein the leg (1 3) has a deformation element (16; 17), which as a molding (16) and / or opening

(17) is formed.

3. Container arrangement (1) according to claim 1 or 2, wherein the saddle element (1 1) has one of the following shapes: U-profile (1 1, 1 lc), T-profile (II b), L-profile (II a), Z-profile (1 le; 1 1 f), I-profile (1 1 d).

4. Container arrangement (1) according to claim 1, 2 or 3, wherein the wall of the outer container (3) in the region of the leg end is thinner than the wall of the inner container (4) is formed.

5. A container assembly (1) according to any one of claims 1 to 4, wherein the modulus of elasticity of the outer container material is lower than the modulus of elasticity of the inner container material.

6. Container arrangement (1) according to one of claims 1 to 5, wherein the outer and inner container (3, 4) Oüber a two container passing through the nozzle (21) are interconnected, on the outside of which the nozzle (21) surrounding and Contour of the inner container (4) following collar (23) is arranged, which is connected via a collar collar following the outer edge (24) with the edge of the nozzle (21) surrounding opening in the outer container (3).

7. Container arrangement (1) according to one of the preceding claims, wherein the coupling element (1 1) in the bottom region of the container (3, 4) is arranged.

8. Container arrangement (1) according to one of the preceding claims, in which inner and outer containers (4, 3) each consist of a cylindrical portion (6, 5) which are each closed at their ends by end plates (8, 7).

9. Container arrangement (1) according to claim 8, in which the end bottoms (8, 7) of the inner and outer containers (4, 3) are each connected to one another via a tubular element (19), which with its outer front end on the inner side the outer bottom (7) and with its inner front end via a transverse thereto flush with the outside of the inner bottom (8) fitting flat piece (18, 18 ') is coupled thereto.

10. Container arrangement (1) according to one of the preceding claims, wherein the inner and outer containers (4, 3) are formed circular cylindrical and the saddle element

(1 1) follows in the lower area with a wrap angle between 90 and 120 ° the course of the inner and outer container.

11. Container arrangement (1) according to claim 10, in which the saddle element (11) in the sole region is interrupted in an angle range between 10 and 20 °.