Container wall for a container covered by a foil and outer formwork for producing the container wall

Abstract

A container wall for storing and fermenting materials, comprising a clamping channel, having an undercut near the upper edge that is open for clampingly receiving a rim of at least one plastic foil that covers the container at the top, the clamping channel comprises a narrowed lateral insertion slot with an upper and a lower protrusion, to which the foil can be wrapped around. A lower wall of the clamping channel is wider than the thickness of the clamping rail at the facing longitudinal edge which is formed as a flat profile, the upper wall of the clamping channel is at least twice as wide as the thickness of the clamping rail. The insertion profile can be inserted into the clamping channel through the entry. When the foil that is wrapped around the insertion profile is under tension, the insertion profile is retained in the clamping channel by the protrusions.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]Not applicable.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH[0002]Not applicable.BACKGROUND OF THE INVENTION[0003]The invention relates to a container wall according to claim 1 or 3 and an outer formwork for producing the container wall according to claim 22.[0004]Container for storing and fermenting of ferments, for example in so-called biogas plants have considerable dimensions. They are mostly designed silo-like and thus have mostly a circular base. The wall is for example cast from concrete and the sealing to the top is often realized by a roof shaped foil, which is held in a tense and raised state by gas production or by a introduction of compressed air. For the secure fixation of the foil at the rim to the container wall, it is also known to install a clamping profile to the upper outer portion of the wall, into which the foil can be inserted and be affixed by the use of a clamping tube.[0005]From DE 10 64 869 A it is known, to i...

AI Technical Summary

Benefits of technology

[0008]The objective of the invention is to create a container wall for a container with a device for fixating a foil made of plastic material that seals the container roof-like at the top, which can easily be manufactured and assembled and especially also can withstand high tensile forces at the foil. A further objective is to create a simple outer formwork for a container wall.

[0010]Depending on the pressure conditions in the container and the wind force that acts on the roof foil considerable tensile forces are exerted on the foil rim. The risk is therefore, that the foil rim is being pulled out when the tensile forces exceed a certain value. This risk is increased, when the angle of the foil rim to the associated leg of the rail-shaped clamping profile takes up a larger value, so that the leg undergoes a deformation and is bent upwards and the traction between foil rim and clamping profile is reduced.

[0011]In one solution it is ensured that especially for higher tensile forces on the foil the tensile force acting on the facing upper leg essentially introduced as a compression force to the leg and acts only as a smaller bending moment on the leg. Thus there is no disadvantageous deformation of the clamping profile with the result that the foil rim is being pulled out.

[0012]Viewed in the cross section, the insertion slot of the clamping channel lies in a plane, which is obliquely directed downward, which means it lies in an acute angle to the overlying container wall. If the pressure in the container increases, this leads to a raising of the roof foil, whereby the angle is increased. This reduces the pull-out force at the clamping profile. By a tilting of the clamping profile, however a greater pull-out resistance is acquired. The foil rim for example extends in an angle of 30° to 45° to the horizontal. The leg of the clamping profile facing the foil rim preferably extends in the same angle. Thus, with the invention also with higher values of the pull-out force a secure anchorage of the foil rim is assured.

[0019]As already indicated, the invention is particularly advantageous, if the profile rail is in a tilted position, to increase the pull-out force and to reduce the bending load at the associated leg respectively. At the profile rail mounted to the outside of the wall, the upper leg is loaded with the tensile force of the foil in particular. The tensile force produces a bending moment. The tilted arrangement allows an extension of the leg of the profile rail facing the foil in a direction approximately parallel to the foil or in only a small angle to it. Thus a small-scale profile rail can be used to achieve the same pull-out forces as in conventionally mounted profile rails whose insertion slot is for example in the vertical or whose upper leg forms a larger angle to the foil respectively. With an integration of a profile rail into the material of the container wall the thickness of the material of the profile rail, which is preferably formed from flat material, can be very small, since the forces are largely absorbed by the surrounding material of the container wall. Also with the arrangement of the profile wall in recesses of vertical mounting sections it is ensured that a significant resistance is opposing the bending of the upper leg of the profile rail, whereby the risk of pulling out the foil rim is considerably reduced.

Problems solved by technology

The risk is therefore, that the foil rim is being pulled out when the tensile forces exceed a certain value.

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