WO2020228878A1

WO2020228878A1 - Container, produced from a helically bent sheet metal strip and method for producing a container of this type

Info

Publication number: WO2020228878A1
Application number: PCT/DE2020/000091
Authority: WO
Inventors: Peter Koch
Original assignee: K + M Silotechnik GmbH
Priority date: 2019-05-16
Filing date: 2020-05-06
Publication date: 2020-11-19
Also published as: CN113840785B; DE112020002435A5; CN113840785A; DE102019003445A1; EP3969690A1; EP3969690B1; EP3969690C0

Abstract

The invention relates to a cylindrical container (10), in particular a silo, for storing solids and/or liquids and/or gases and/or bulk materials or similar, produced from a helically bent, continuously overlapping sheet metal strip (20) forming a wall arranged in a cylindrical plane, wherein the upper and lower sheet metal strip edges arranged overlapping adjoining one another one another are connected to one another all around in a sealing manner at a continuous helical joint, characterised in that the wall of the container (10) consists of multiple sheet metal strips (20, 30, 40) arranged directly next to one another, i.e. in the cylindrical plane and parallel thereto.

Description

DESCRIPTION

Container made from a helically bent sheet metal strip and method for producing such a container

TECHNICAL AREA

The present invention relates to a cylindrical container, in particular a silo, for the storage of solids and / or liquids and / or gases and / or bulk materials or the like, made from a helically bent one above the other and continuously extending a sheet metal strip arranged in a cylindrical plane, whose Upper and lower sheet metal strip edges arranged adjacent to one another are connected to one another in a circumferential sealing manner at a helically extending continuous joint.

The present invention further relates to a method for

Production of such a container with a propulsion, bending and connecting device for the sheet metal strip and a storage device for the supplied sheet metal strip during assembly.

STATE OF THE ART

Containers made from helically bent sheet metal strip are known from DE 2 250 239 A. To manufacture containers, a coil with a diameter corresponding to the container diameter is formed from a sheet metal strip. In the

Manufacture of such a container are mutually exclusive

associated spiral sheet metal band edges are initially bent and then connected to one another in a fluid-tight manner on the outside of the container by means of a fold. For this purpose, the mutually opposite longitudinal edges of the sheet metal strip are each bent out in a U-shape and the mutually associated U-shaped outwardly Sheet metal edges are placed inside each other and then connected by folding. This system is known on the market as the Lipp double fold system and has proven itself in many ways. This lip-double-fold system enables the containers to be produced quickly and easily with variable diameters and heights. Transportable bending sheet metal and assembly devices ensure that the container can be assembled at the respective installation site and that

Transport volume can be reduced accordingly.

From DE 199 39 180 A1, a container is known in this way

to produce that a first edge section is bent to the outside with the formation of a helical extending bent edge and a second edge section of the sheet metal strip arranged adjacent above it is bent outwards and is then connected to a first edge section by a fold.

For the previous applications of this container system,

For example, for storing bulk goods from agriculture and forestry or biowaste, the containers have a

excellent stability, tightness and media resistance. For other applications, such as the storage of fluid media such as vegetable oils, petroleum or the like, however, a significantly larger container volume is required, in which the

Leak tightness must be reliably guaranteed. The associated increased mechanical stability of the containers cannot be adequately guaranteed by the known folding systems. In particular, the folding system reaches its limits with large sheet metal thicknesses.

In order to provide helically produced containers from bent sheet metal, the range of applications of which is enlarged, in particular with regard to the implementation of a large storage volume and / or increased mechanical stability while ensuring that they can be manufactured quickly and easily or assembly, solutions were developed that replace the folded seam with a welded connection.

WO 2014/048515 A1 discloses a container made from a helically bent sheet-metal strip of the type described at the outset, the edge sections of the adjacent edge regions of the sheet-metal strip running one above the other in terms of height via a

Welded connection are connected to each other. The edge areas overlap and are connected to one another in a fluid-tight manner by two separate weld seams. The existing spacing of the weld seams creates a gap area between the overlapping walls in the overlap area of adjacent edge areas of the sheet metal strip, which after manufacture of the container is not easily controllable with regard to possible corrosion risks or the like.

EP 1 181 115 B1 describes a cylindrical container of the type mentioned at the beginning and a method for producing such a container. In this cylindrical container, a jacket is used, which at least partially consists of a sheet metal strip that is helically wound so that the lateral

Edge areas of the sheet metal strip adjoin one another at a helically extending joint. The edge areas of the sheet metal strip are each angled to one side at the joint, the angled area being connected to one another in a sealing manner by a folded joint. At the same time, the sheet metal strip is welded to one another in the vicinity of the joint on the inside of the jacket. The edge areas of the upper and lower sheet metal strip that meet at the joint are arranged in one plane, so that a gap for the application of a weld seam is only provided by the curvature of the edge area in the joint area. As a result, the weld seam can only be applied sealingly and reliably with increased effort, since the weld metal in the area of the joint during the manufacturing process in the liquid state tends to flow off due to the action of gravity, which negatively affects the quality of the weld seam. Complex measures must therefore often be taken in this area in order to produce a weld seam that is permanently reliable

Connection function with high load-bearing capacity and a permanently reliable sealing function guaranteed. This works out

especially for containers with thin sheet metal strip cross-sections as expensive.

DE 202012009932 U1 discloses a container made from a helically bent sheet-metal strip, the mutually adjacent helical sheet-metal strip edges being bent and tightly connected by means of a fold which is thereby

is characterized by the fact that an additional sheet metal section is welded onto the side of the area of the seam foot opposite the fold in order to prevent foreign matter from penetrating into the fold, which, however, is relatively expensive to manufacture.

DE 102015004281 A1 discloses a container made from a single-layer, helically bent sheet-metal strip, in which no seam connection is used, but the connection in the abutment area of adjacent helically extending edge sections of the sheet-metal strip by a sheet metal strip on both sides

Inside and outside the welded joint is produced, which makes particularly high demands on the

Making the welded joint represents and a high

Requires positioning accuracy of the supplied edge areas to produce the welded joint.

Due to the necessary cold forming process of the sheet metal strips during the assembly process, the cross-sectional thickness of the replaceable sheet metal strips is limited at the top, which also sets certain limits on the geometry and the load capacity of the silos produced using these known methods. DISCLOSURE OF THE INVENTION

Based on the stated prior art, the

The present invention is based on the object or the technical problem of specifying a cylindrical container of the type mentioned, which can be manufactured economically, which enables a simple and reliable assembly method, which ensures a permanently reliable functionality, large geometries with regard to diameter and height of the to be created Allows container and meets the requirements for a sealing function.

The present invention is also based on the object or the technical problem of specifying a method for producing such a container.

The container according to the invention is characterized by the features of

independent claim 1 given. Advantageous refinements and developments are the subject of the independent

Claim 1 directly or indirectly dependent claims.

The container according to the invention is accordingly characterized in that the wall of the container consists of several directly next to one another, i.e. in and parallel to the cylindrical plane,

arranged sheet metal strips.

An embodiment that is particularly advantageous in practice, which ensures economic use with permanently reliable functionality, is characterized in that two, three or four sheet metal strips are arranged directly next to one another.

It has proven to be particularly advantageous to use a welded connection for the connection of the adjacent upper and lower sheet metal strip edges, in particular with regard to ensuring high load-bearing capacities and high tightnesses. Particularly preferably, a configuration with regard to practical applications is characterized in that the sheet metal thickness of the individual sheet metal strips have different or the same cross-sectional thicknesses in the range between 2 to 20 mm, in particular in the range between 4 to 10 mm.

With regard to a simple and reliable production of the

A connection that meets high quality requirements is characterized in a preferred embodiment in that the welded connection has a welded seam that is welded in from the outside and the inside of the container, in particular by a weld seam that is continuous in the transverse direction.

In terms of welding technology, the welded connection can be designed as a butt weld, DHY or DY seam in order to meet the high quality standards.

Steel is the preferred material to ensure high load capacities, large diameters and heights of the container.

A particularly advantageous embodiment that is particularly suitable for containers that require particularly high quality standards for the storage of the stored goods within the container,

for example drinking water, is characterized in that the sheet metal strip arranged on the inside consists of stainless steel or has a stainless steel cover on the inside.

To increase the load capacity of the container according to the invention, a particularly advantageous development is characterized in that at least one, in particular several, arranged offset in the height direction on the outside of the container

Stiffening ring profile connected, in particular welded on.

The method according to the invention for manufacturing a container mentioned above is characterized by the features of the independent Method claim 10 given. Advantageous refinements and developments are the subject of the independent

Method claim 10 directly or indirectly dependent claims.

The inventive method for producing a

Container according to the invention, in which a propulsion, bending and connecting device for sheet metal strips and a storage device for the supplied sheet metal strip is used during production, the sheet metal strip being continuously withdrawn from a storage device and fed to the drive, bending and connecting device, is characterized accordingly characterized in that the propulsion, bending and connecting device is simultaneously fed with several sheet metal strips arranged next to one another directly parallel to the plane of the wall, bent and interlocked with one another

opposite sheet metal strip edges are connected to one another, in particular welded.

In an advantageous embodiment, according to the method, the sheet metal strips are from several separate storage devices

Propulsion, bending and connecting device supplied.

Alternatively, it is also possible that the plurality of sheet metal strips are each withdrawn from a storage device and fed to the propulsion, bending and connecting device.

The connecting device is preferably designed as a welding device.

A particularly preferred embodiment of the method according to the invention is characterized in that, during assembly, a bearing device is used on which the respectively fed lower sheet metal strip edges of the fed sheet metal strips are mounted displaceably in a rotational direction. In that the respectively supplied lower sheet metal edges of the multilayer sheet metal strip package are directly supported on the bearing device during assembly the stresses on the container during assembly are significantly reduced, since the bearing forces are introduced centrally from the wall into the storage facility. This significantly reduces the stress on the container wall during assembly.

A particularly advantageous embodiment that improves the quality of the

Manufacturing process significantly increased in terms of permanently reliable functionality, tightness and load-bearing capacity, is characterized in that a pressing device is used, which is arranged in front of the propulsion, bending and connecting device and a

allows rotational movement of the sheet metal strips fed in and exerts a pressure force acting on the sheet metal strips fed in from the outside perpendicular to the wall plane on both sides.

Further embodiments and advantages of the invention result from the features also listed in the claims and from the exemplary embodiments given below. The features of the claims can be combined with one another in any way, provided that they are not obviously mutually exclusive.

BRIEF DESCRIPTION OF THE DRAWING

The invention and advantageous embodiments and developments thereof are described below with reference to the in FIG

Examples shown in the drawing are described and explained in more detail. The features to be taken from the description and the drawing can be used individually or collectively in any combination according to the invention. Show it:

1 a is a schematic side view of a container made from helically bent sheet-metal strips that run continuously over one another and are arranged in multiple layers, Fig. Lb a schematic cross section through the container according to Fig. La,

Fig. 2 a schematic detailed longitudinal section through the multilayer

Wall of the container according to FIG. 1 and according to section I-I,

3 shows a schematic detailed cross-section through the multilayer

Wall of the container according to FIG. 1 and according to section II-P,

4 is a highly schematic detailed illustration of the storage of the

Sheet metal strips of the container according to FIG. 1 on one

Storage device with bearing rollers and pressure rollers arranged on the side,

5 shows a schematic detailed cross-section through the joint area

Adjacent sheet metal longitudinal edges suitable for a DY weld seam connection,

Fig. 6 schematic detailed cross-section through the joint area

Adjacent sheet metal longitudinal edges suitable for a DHY weld joint,

7 shows a schematic detailed cross-section through the joint area

Adjacent sheet metal strip longitudinal edges suitable for a butt weld joint,

8 shows a schematic detailed longitudinal section through the wall of the

Container according to FIG. 1 with an outside

connected stiffening ring profile and

Fig. 9

to 12 schematic plan view and side view of the container according to FIG. 1 during the assembly process in FIG

different assembly states with feeding of several sheet metal strips arranged next to one another to a jacking, bending and connecting device, mounted on a bearing device that allows a rotary movement of the container during the assembly process.

WAYS OF CARRYING OUT THE INVENTION

In Fig. La a container 10 is shown schematically in a side view, which is designed as a cylindrical cross-section of the container 10 (see Fig. Lb).

The container 10 is covered on the top with a roof structure 26.

The container is designed to be rotationally symmetrical to its central longitudinal axis 12 and has, for example, a diameter 14 which can be in the range between 5 and 50 m. The height 16 of the container 10 can for example be in the range between 10 to 30 m.

The wall of the cylindrical container 10 is formed from helically bent sheet metal strips 20, 30, 40 which run continuously one above the other.

The outside of the container 10 is shown in the figures with the

Reference symbol A and the inside of the container 10 is indicated in the figures with the reference symbol I.

According to the invention, the wall of the container 10 is composed of multilayer sheet metal strips 20, 30, 40. As in that

The embodiment according to FIGS. 2 and 3, in which a detailed longitudinal section along the section line IΊ or a detailed cross section along the section line P-II of FIG. 1 is shown in detail, is a first sheet metal strip from the outside A to the inside I 20, followed immediately by a second sheet metal strip 30 and then immediately followed by a third sheet metal strip 40. The sheet metal strips 20, 30, 40 are located directly next to each other and run in the container level E or parallel to the container level E.

In the exemplary embodiment, three sheet metal strips 20, 30, 40 are shown.

The wall can, however, also consist, for example, of three or four or more sheet metal strips.

At the joint of the sheet metal strips 20, 30, 40, an upper sheet metal band edge 22, 32, 42 meets a lower sheet metal band edge 24, 34, 44 of the first, second and third sheet metal strips 20, 30, 40. A welded joint 80 is present in this joint point who the

Connects sheet edge areas with each other. In the exemplary embodiment according to FIG. 2, the weld connection 80 has a weld seam which is continuously welded from the outside and inside.

The welding material introduction direction is shown in FIG. 2 with the

Reference symbol S indicated.

In FIG. 5, an embodiment of the sheet metal strip edges 22, 24, 32, 34, 42, 44 is shown, which enables the weld connection 80 to be designed as a double Y weld seam (DY weld seam). Alternatively, according to FIG. 6, the weld joint can also be designed as a double half Y weld seam (DHY weld seam).

According to FIG. 5, a gap 18 can be present between the upper sheet metal strip edge 32 and the lower sheet metal strip edge 34 of the second sheet metal strip 30, which gap is filled with weld metal.

In a further alternative, the welded connection 80 is designed as a continuous butt weld seam from the outside to the inside. The gap 18 is completely filled with weld metal.

In Fig. 8 is a highly schematic detailed longitudinal section through the

Wall of the container 10 shown, with the outside on the first Sheet metal strip 20 is welded to a stiffening ring profile 90, which is used if necessary in order to increase the load capacity or the buckling resistance of the container.

FIGS. 9 to 12 show the individual method steps in the production of a container 10 and the steps used for this purpose

Equipment shown schematically.

First, there is a bearing device 52 on which three rotatable coils 50 are rotatably mounted, each with a sheet metal strip 20 or 30, 40. The sheet metal strips 20, 30, 40 are pulled off at the same time and fed in the direction of rotation R to a propulsion, bending and connecting device 60.

Furthermore, below the container 10, a bearing device 70 is present in the circumferential direction, which has bearing supports 72 in the circumferential direction in a predetermined grid, on which height-adjustable bearing rollers 74 are present. The height of the bearing rollers 74 is set in such a way that the sheet metal strips 20, 30, 40 which are fed in and are mounted on the bearing rollers 74 have a helical pitch.

The geometrical arrangement of the bearing roller 40 within the bearing support 72 is shown in a highly schematic manner in FIG. The respective lower sheet metal strip edge 24, 34, 44 of the jointly supplied

Sheet metal strips 20, 30, 40 is mounted directly on the bearing roller 74. This has the advantage that the bearing force acts directly centrally on the wall of the container 10 and no additional bending stress occurs on the wall during the manufacturing process. To be safe

To ensure that the supplied sheet metal strips 20, 30, 40 are brought together directly next to one another and in direct contact with one another, a pressing device 75 is arranged immediately in front of the propulsion, bending and connecting device 60, which has two pressure rollers 77 both on the outside and on the inside A pressure force D is applied to pressure rollers 77, so that the sheet metal strips 20, 30, 40 that are fed in are pressed against one another.

As already described above, the abutting sheet metal strip edges are connected to one another by means of a welded joint 80.

As shown in FIG. 9, after the production of the first cylindrical ring, which has a helical pitch, the upper sheet metal strip edges of the upper sheet metal strips 20, 30, 40 are cut straight, so that a horizontal line support structure for the roof structure 26 results. In the further manufacturing process, the sheet metal strips 20, 30, 40 are fed in at the same time and their sheet metal strip edges are continuously welded after the sheet metal strips 20, 30, 40 have previously been provided with a curvature in the device 60, so that the desired cylindrical circumferential contour with the desired diameter 14 of the container 10 results.

After the container 10 has reached the desired height 16, the lower sheet metal strip edges of the lower sheet metal strips 20, 30, 40 are also cut off in a horizontal line, which is shown in FIG. The container 10 can then be placed on the support structure present in the subsurface.

Before the underside of the container 10 is cut straight, the storage device 52 for the coils 50 and the propulsion, bending and connecting device (welding device) 60 is removed (see FIG. 11).

With the manufacturing method shown, containers 10 can be manufactured economically in very large dimensions, which ensure high loads and are absolutely tight.

Claims

EXPECTATIONS

01. cylindrical container (10), in particular silo, for

Storage of solids and / or liquids and / or gases and / or bulk materials or the like,

- made from a helically bent one

Continuously running one above the other, a sheet metal strip (20) forming a wall arranged in a cylindrical plane (E),

- whose upper and lower sheet metal strip edges (22, 24), which are arranged adjacent to one another, are connected to one another in a circumferential sealing manner at a helically extending continuous joint,

- characterized in that

- The wall of the container (10) consists of several sheet metal strips (20, 30, 40) arranged directly next to one another, that is to say in and parallel to the cylindrical plane (E).

02. Container according to claim 1,

- characterized in that

- Two, three or four sheet metal strips (20, 30, 40) are arranged directly next to one another.

03. Container according to claim 1 or 2,

- characterized in that

- The upper and lower sheet metal strip edges (22, 24; 32, 34; 42, 44) are connected to one another by means of a welded connection (80).

04. Container according to one or more of the preceding

Expectations,

- characterized in that

- The sheet metal thickness of the individual sheet metal strips (20, 30, 40) have different or equal cross-sectional thicknesses in the range between 2 to 20 mm (millimeters), in particular in the range between 4 to 10 mm (millimeters).

05. Container according to one or more of the preceding

Expectations,

- characterized in that

- The welded connection (80) has a welded seam from the outside (A) and the inside (I) of the container (10), in particular by a weld seam which is continuous in the transverse direction.

06. Container according to claim 5,

- characterized in that

- The weld joint (80) is designed as a butt weld, DHY or DY seam.

07. Container according to one or more of the preceding

Expectations,

- characterized in that

- The sheet metal strips (20, 30, 40) are made of metal, in particular steel.

08. Container according to claim 7,

- characterized in that

- The sheet metal strip arranged on the inside consists of stainless steel or has a stainless steel cover on the inside.

09. Container according to one or more of the preceding

Expectations,

- characterized in that

- on the outside (A) of the container (10) at least one, in particular several, stiffening ring profile (90) arranged offset in the height direction is connected, in particular welded.

10. A method for producing a container according to one or more of the preceding claims, wherein a propulsion, bending and connecting device (60) for sheet metal strips (20) and a storage device (70) for the supplied sheet metal strip (20) is used during manufacture , wherein the sheet metal strip (20) is continuously withdrawn from a storage device (52) and fed to the drive, bending and connecting device (60),

- characterized in that

- Several sheet metal strips (20, 30, 40) arranged next to one another in the center parallel to the wall plane (E) are fed to the propulsion, bending and connecting device (60) at the same time, bent and one below the other in opposite sheet metal strip edges (22, 24; 32, 34; 42, 44) are connected to one another, in particular welded.

11. The method according to claim 10,

- characterized in that

- The sheet metal strips (20, 30, 40) are withdrawn from several storage devices (52) simultaneously and fed to the propulsion, bending and connecting device (60).

12. The method according to claim 10,

- characterized in that

- The plurality of sheet metal strips (20, 30, 40) are each fed from a storage device (52) to the propulsion, bending and connecting device (60).

13. The method according to one or more of claims 10 to

12,

- characterized in that

- The connecting device (60) is designed as a welding device.

14. The method according to one or more of claims 10 to

13,

- characterized in that

- During assembly, a storage device (70) is used on which the respectively fed lower sheet metal strip edges (24, 34, 44) of the fed sheet metal strips (20, 30, 40) are mounted displaceably in the rotational direction (R).

15. The method according to one or more of claims 10 to

14,

- characterized in that

- A pressing device (75) is used, which is arranged in front of the advancing, bending and connecting device (60) and allows a rotary movement (R) of the sheet metal strips (20, 30, 40) fed in, as well as a movement on the sheet metal strips (20 , 30, 40) exerts a contact pressure acting on both sides from the outside perpendicular to the wall plane (E).