EP2248730A1 - Small container - Google Patents

Abstract

The container (10) has a case (14) arranged in a frame and thermally insulated by an insulating layer (15.3) of an underbody (15), an insulating layer (16.3) of an outer cover (16) and an insulating layer (17.3) of a top layer (17). The frame is provided with a base frame (12), supports (11), and a stacking frame (13), which is supported on the case. A heating- or cooling device includes a heating- and cooling coil arranged between inner- and outer walls and a control provided with a protective housing formed from stainless steel.

Description

The invention relates to a small container according to the preamble of patent claim 1.

Such Kleincontainer are for example from the DE 200 13 000 known. They have a container or tank, which is used in a frame with a standardized floor plan, which usually allows the stacking of several small container. In particular, when used in the food industry, cooling or heating devices, for example consisting of cooling or heating coils, which are controlled by a corresponding control device, are often mounted on the outside of the container. In order to protect these cooling or heating devices, an outer sheath is usually provided, which can be attached to the outside of the frame or prefabricated together with the container as a mounting unit and, for example, consists of sheet metal. Insulating means are usually arranged between the container and the outer jacket in order to increase the efficiency of the cooling or heating. Since the outer jacket is exposed to all external influences, in particular also impacts and collisions with other objects, it is understood that it must be made sufficiently stable in order to survive these unscathed.

When constructing such small containers, strict rules must be observed, which are summarized in the ADR / RID / IMGD code, in particular in chapter 6.5. For example, there are regulations that specify a minimum wall thickness of the container, based on a reference steel. On the one hand, this leads to a high cost of materials, ie high production costs and on the other hand to a high weight, so high transport costs.

The object of the invention is to provide a small container with low production and transport costs.

This object is achieved by a small container having the features of patent claim 1.

Thus, the small container according to the invention arranged in a frame, by an insulating layer thermally insulated container, wherein at least one wall of the container is designed as a double wall with an inner wall and an outer wall, wherein the insulating layer between the inner wall and the outer Wall of the double wall is arranged and / or in which the frame has a base frame, a support on the container stacking frame and supports.

The invention is based on the finding that, with a suitable embodiment, the container wall can assume a plurality of tasks.

Thus, on the one hand by execution of the container wall as a double wall with embedded insulation while maintaining the safety regulations, the function of the previously used separate outer sheath are taken over, so this can be omitted, resulting in significant material and weight savings.

Alternatively or additionally, the container wall can accommodate a part of the forces acting on the frame forces when they are introduced into the wall, so that the frame only has to be designed to accommodate lesser loads, what also brings tangible savings in terms of material and weight.

In a preferred variant of the invention, a heating or cooling device is additionally provided, so that the desired temperature in the small container can be selectively controlled. In this case, the heating or cooling device on one or more mounted outside the container controls and arranged between the inner wall and the outer wall heating or cooling coils. The heating or cooling device may in particular also have one or more heating or cooling circuits.

Furthermore, it is particularly advantageous if the control has a stainless steel protective housing and / or is installed in a pressure-sealed housing and the outer wall is penetrated by at least one cable feedthrough, which is preferably liquid-tight and / or gas-tight, since such small container for applications, in which they must be explosion proof, can be used. Particularly suitable for such applications are cable bushings made of stainless steel, which are welded circumferentially to the outer wall of the container.

A particularly cost-effective production of Kleincontainers is possible if the wall of the container is made of segments together, which are welded together. In particular, an embodiment with three segments, namely a subfloor, a jacket and a topsoil has proven to be in which the subfloor and the jacket and the topsoil and the jacket are welded together.

Due to its structure, the subfloor can significantly contribute to the complete emptying of the container is possible. This structuring can be achieved very inexpensively and simply by deep drawing.

Providing further the base frame with a centering plate and the bottom plate with a cylindrical embossing, the assembly of rack and container, which is necessary for example for initial assembly or repairs, much easier.

A particularly simple introduction of forces acting on the frame forces in the container is possible if the stacking frame has an angle profile at least in areas in which it is supported on the container.

Further weight advantages can be achieved if the supports of the frame are made as hollow profiles.

A particularly stable arrangement of the container in the frame can be achieved if the inner wall of the container is supported on the base frame. This is advantageously done with round tube feet, the number of which can be limited to three in order to save weight.

It is particularly advantageous if, in the case of the double wall, the distance between inner wall and outer wall is at least in sections not constant. This makes it possible in particular to make the shape of the outer wall as simple as possible even in areas where the inner wall is structured. This also contributes to the cost reduction.

In the following, specific embodiments of the invention will be explained in more detail with reference to the attached figures.

Fig. 1:

einen Querschnitt durch einen erfindungsgemäßen Kleincontainer,

Fig. 2a:

einen vergrößerten Ausschnitt aus Figur 1,

Fig. 2b:

einen vergrößerten Ausschnitt aus Figur 2a,

Fig. 3a:

die innere Wand eines Unterbodens des Kleincontainer aus Figur 1, betrachtet von schräg oben,

Fig. 3b:

einen Ausschnitt aus der in Figur 3a gezeigten inne- ren Wand, betrachtet von außen,

Fig. 4:

eine Seitenansicht des Kleincontainers aus Figur 1, wobei äußere Wände und Isoliermaterial als transpa- rent angenommen sind,

Fig. 5:

eine Seitenansicht des Kleincontainers aus Figur 1,

Fig. 6:

eine Ansicht des Kleincontainers aus Figur 1, be- trachtet von schräg unten,

Fig. 7:

eine Ansicht des Kleincontainers aus Figur 1, be- trachtet von schräg oben,

Fig. 8:

eine Ausschnittsvergrößerung eines Details der Figur 7,

Fig. 9:

eine Kabeldurchführung durch eine äußere Wand eines Kleincontainers und

Fig.10:

eine Tabelle, in der an einem konkreten Beispiel die erzielbare Gewichtsreduktion verdeutlicht wird.

It shows

Fig. 1:

a cross section through a small container according to the invention,

Fig. 2a:

an enlarged section FIG. 1 .

Fig. 2b:

an enlarged section FIG. 2a .

Fig. 3a:

the inner wall of a subfloor of the small container out FIG. 1 , viewed from diagonally above,

3b:

a section of the in FIG. 3a shown inner wall, viewed from the outside,

4:

a side view of the small container FIG. 1 where external walls and insulating material are assumed to be transparent,

Fig. 5:

a side view of the small container FIG. 1 .

Fig. 6:

a view of the small container FIG. 1 , viewed from diagonally below,

Fig. 7:

a view of the small container FIG. 1 , viewed from diagonally above,

Fig. 8:

a detail enlargement of a detail of FIG. 7 .

Fig. 9:

a cable passage through an outer wall of a small container and

Figure 10:

a table in which a concrete example illustrates the achievable weight reduction.

Identical objects are denoted by the same reference numbers in all figures, unless otherwise stated.

FIG. 1 shows a cross section through a small container 10 according to the invention. It can be seen a frame composed of supports 11, base frame 12 and stack frame 13 and a container 14. The wall of the container 14 is composed of three sections, namely an underbody 15, a shell 16 and a top 17. In the illustrated embodiment, the underbody 15, shell 16 and upper floor 17 are each double-walled and each have an inner wall 15.1, 16.1, 17.1 and an outer wall 15.2, 16.2, 17.2. Between the inner wall 15.1, 16.1, 17.1 and the outer wall 15.2, 16.2, 17.2 in the illustrated embodiment, in each case an insulating layer 15.3, 16.3, 17.3 is arranged, which is formed in the simplest case as a cavity or space between opposite wall sections.

The upper floor 17 passes through to fill the container 14, a manhole 18, which is closable with a lid 19. The lid 19 may be designed for example as a screw cap or clamping ring cover. The underbody 15 passes through a container outlet 20, which can be closed by means of a butterfly valve 21 or a Kugelhans. The inner wall 15.1 of the subfloor 15 has at least in sections a slope in the direction of the container outlet 20, which supports the emptying of contents. The outer wall 15.2 of the subfloor 15 has a cylindrical embossment 22 which engages with a centering plate 23 provided in the base frame 12 and so ensures the optimal centering of the container 14 in the base frame 12.

Next is the sectional view of FIG. 1 to take a Rundrohrfuß 24, which supports the inner wall 15.1 of the subfloor 15 on the base frame 12.

The area B, which is defined by a circular boundary line in FIG. 1 is marked, defines the in FIG. 2a enlarged section of the illustrated FIG. 1 ,

FIG. 2a shows an enlarged view of the in FIG. 1 With this area, a portion of a support 11, a base frame 12, a bottom 15 and a shell 16 can be seen, with sub-bottom 15 or shell 16 each have an inner wall 15.1 and 16.1 and an outer wall 15.2 or 16.2.

Also in FIG. 2a can be seen that in the double wall of the subfloor 15 and the shell 16 embedded insulating 15.3 and 16.3, the thickness of which is not constant at least in sections, where "sections not constant" both differences between different areas of Kleincontainerwandung, eg upper floor 17 and shell 16, as well as differences within a range of the Klekontontainerwandung, eg within the subfloor 15 includes.

Specifically, in the embodiment of the FIG. 2a on the one hand, in general, the jacket 16 a thinner insulation layer 16.3 than the subfloor 15, while on the other hand, a variation of the thickness of the insulating material 15.3 is given at different points of the subfloor 15.

The area E, which is defined by a circular boundary line in FIG. 2a is marked, defines the in FIG. 2b enlarged section of the illustrated FIG. 2a ,

FIG. 2b shows an enlarged view of the in FIG. 2a area marked with the letter E. In this illustration, a transition between an underbody 15 with inner wall 15.1 and outer wall 15.2 and a shell 16 with inner wall 16.1 and outer wall 16.2 can be seen in detail.

In particular, it can be seen that the inner wall 15.1 of the subfloor 15 in the contact region has a higher wall thickness than the inner wall 16.1 of the shell 16. It has been found that such a variation of the wall thickness is tolerable in weld joints as long as the material offset of the components not is more than 50%. This finding is therefore of considerable relevance for weight reduction, as the minimum wall thickness required in the ADR / RID / IMGD Code must be fulfilled in each area of the container wall. In order to promote a complete emptying of the Kleincontainers 10, the subfloor 15 is usually structured, which in particular in the advantageous structuring by deep drawing in certain sections, but not at the edge of the subfloor 15, which is welded to the jacket 16, to a Thickness reduction leads. This edge thus has a greater thickness than is absolutely necessary. Without the provision of a difference in wall thicknesses of underbody 15 and shell 16 in their contact area, therefore, the jacket 16 would have to be made stronger than required, which would entail considerable weight disadvantages.

To further illustrate this situation serve the FIGS. 3a and 3b. FIG. 3a shows an exemplary embodiment the inner wall 15.1 of a subfloor 15 of the small container 10 from FIG. 1 with an outflow opening 300. Especially in the FIG. 3a shaded areas reduces the wall thickness by up to 0.7 mm. In FIG. 3b is an enlargement of the in FIG. 3a shown area around the outflow opening 300, but now viewed from the outside, to illustrate the areas of reduced wall thickness even clearer.

To further clarify the construction of the small container 10, is in FIG. 4 the small container 10 off FIG. 1 with partially removed outer wall 15.2, 16.2, 17.2 and transparent insulation layer 15.3, 16.3, 17.3 shown. In this illustration, in addition to supports 11, base frame 12 stack frame 13 and container 14, only inner walls 15.1, 16.1, 17.1 of the double wall of the container 14. In addition, heating or cooling coils 401 and a supply line to 402 to the heating or cooling coils to detect. Optionally, between the heating or cooling coils 401 and the insulating layer, not shown, also an aluminum foil, not shown, are arranged, whose reflectivity increases the efficiency of use, especially of heating coils 401 noticeably.

Next are representation of Kleincontainers 10 in FIG. 4 three circular tube feet 24 can be seen, which support the inner wall 15.1 of the subfloor 15 on the base frame 12.

FIG. 5 shows a side view of the FIG. 1 In this illustration, one recognizes further a protective housing 501, in the interior of which the control for the heating or cooling is arranged.

FIG. 6 shows the view of FIG. 1 known Kleincontainers 10 obliquely from below. In this perspective, the base frame 12 with the centering plate 23, in which the cylindrical embossment 22 is received in the bottom 15, can be particularly well recognized.

FIG. 7 shows the view of FIG. 1 known Kleincontainers 10 obliquely from above. In this illustration, it is particularly easy to see how the introduction of stacking forces into the body of the container 14 can be achieved by suitable design of the stack frame 13. As can be seen from this figure, engage the edges of the top 17 at least partially the stack frame 13, which has two longitudinal profiles 701, 702 and two transverse profiles 703, 704. The longitudinal or transverse profiles 701, 702 and 703, 704 are preferably angle profiles, with an angle profile in particular two straight metal strips, in each case one of the longitudinal edges of the one strip are connected at right angles to one of the longitudinal edges of the other strip to understand. Thus, forces introduced into the frame are in part transmitted to the edge sections of the upper floor 17 engaging under the angle profiles. It is particularly favorable to distribute the introduction of force via the upper floor 17 by providing a reinforcing structure, in particular a stiffening embossing 705. Furthermore, catch shoes 706 are advantageously provided on the stack frame 13, in which protuberances of the base frame 12 or feet of another, similar small container 10 can engage. This prevents unwanted shifting stacked small container 10 relative to each other.

The area A, which is defined by a circular boundary line in FIG. 7 is marked, defines the in FIG. 8 enlarged shown Detail of the FIG. 7 , a corner of the stack frame 13.

FIG. 8 shows a detailed view of the section A from FIG. 7 , which in particular provides further information about the structure of the stacking frame 13.

FIG. 9 1 shows a cable feedthrough 900 through an outer wall 901 of a small container 10, with which a heating cable 902 and a sensor line 903 are welded by means of a V2A screw connection 904 which is peripherally welded to the outer wall 901. The like in FIG. 9 The cable bushing 900 designed for liquid and gas tightness, which in particular allows use in accordance with ATEX in hazardous areas Ex II G EEx ed (ib) II C T4, if in addition the protective housing of the heating or cooling control is pressure-encapsulated.

FIG. 10 summarizes in tabular form the weight savings for a typical small container 10, broken down by the individual measures. By the double wall principle in combination with the introduction of a part of the forces acting in the container as shown in this table leads to a weight reduction of the tare weight of the container of over 15%; the material costs scale similarly.

The evidence of the FIG. 10 achieved weight savings result on the one hand substantially from the fact that the inner wall of the container or tank can be made thinner by the design of the container wall as a double wall. Since subfloor 15, sheath 16 and topsoil 17 are all designed with double walls, weight savings are possible with all these components. In addition occurs that the buckling forces for which the frame must be designed by partial Initiation of the stacking forces into the container 14 -there more precisely formulated in the body-can be reduced. This allows a lighter construction of the stacking frame 13 with lighter longitudinal profiles 701, 702, transverse profiles 703, 704 and safety shoes 706 and the supports 11 and further the provision of a tubular frame as a base frame 12th

LIST OF REFERENCE NUMBERS

10

small container

11

support

12

base frame

13

stack frame

14

container

15

underbody

15.1

inner wall of the subfloor

15.2

outer wall of the subfloor

15.3

Insulation layer of the subfloor

16

coat

16.1

inner wall of the coat

16.2

outer wall of the coat

16.3

Insulation layer of the jacket

17

topsoil

17.1

inner wall of the upper floor

17.2

outer wall of the topsoil

17.3

Insulation layer of the topsoil

18

manhole

19

cover

20

container outlet

21

butterfly valve

22

Cylindrical embossing

23

centering plate

24

Round tube leg

300

Bore

401

Heating or cooling coil

402

supply

501

housing

701

longitudinal profile

702

longitudinal profile

703

cross Section

704

cross Section

705

stiffening embossment

706

Fang Shoe

900

Grommet

901

outer wall

902

heating

903

sensor line

904

V2A screw

A

Bereichskennzeichung

B

Bereichskennzeichung

e

area identification

Claims (12)

Small container (10) with a container arranged in a frame, by an insulating layer (15.3, 16.3, 17.3) thermally insulated container (14),
characterized in that the frame comprises a base frame (12), a stack frame (13) and supports (11), wherein the stack frame (13) is supported on the container (14). Small container (10) according to claim 1,
characterized in that in addition a heating or cooling device is provided with one or more heating or cooling circuits. Small container (10) according to claim 2,
characterized in that the heating or cooling device comprises one or more controls mounted outside the container and heating or cooling coils (401) disposed between the inner wall and the outer wall. Small container (10) according to claim 3,
characterized in that the controller comprises a pressure-encapsulated protective housing (501) of stainless steel or incorporated in a pressure-sealed housing (501). Small container (10) according to claim 3 or 4,
characterized in that the outer wall of at least one cable gland (900) is penetrated. Small container (10) according to claim 5,
characterized in that the cable feedthrough (900) is liquid-tight and / or gas-tight. Small container (10) according to claim 5 or 6,
characterized in that the cable gland (900) is made of stainless steel. Small container (10) according to any preceding claim, characterized in that the wall of the container (14) is composed of an underbody (15), a casing (16) and a topsoil (17), the underbody (15) and the casing (16) and the upper floor (17) and the jacket (16) are welded together. Small container (10) according to claim 8,
characterized in that the subfloor (15) is deep drawn. Small container (10) according to any preceding claim,
characterized in that the base frame (12) has a centering plate (23) and the bottom plate (15) has a cylindrical embossing (22). Small container (10) according to any preceding claim,
characterized in that the stacking frame (13) has an angle profile at least in areas in which it is supported on the container (14). Small container (10) according to any preceding claim, characterized in that the supports (11) of the frame are made as hollow profiles.

Images