DD213698B1 - POLYOLEFINI CLOTHING FOR HIGHER WORKING TEMPERATURES AND VERTICALLY LOADED CONTAINERS - Google Patents

Description

Title of the invention

Polyolefin lining for higher working temperatures and vertically loaded container edges ·

Field of application of the invention

The invention relates to polyolefin-lined metallic containers, in particular the execution of the container edges, for receiving aggressive media with working temperatures up to 100 C and for transferring vertical forces on the container edges, for example in systems of electrochemical or chemical surface treatment and chemical apparatus engineering »

Characteristic of the known technical solutions

Are known solid liners, wherein the liner is drawn U-shaped over the sand of the metallic container. Linings of this form made of polyolefins, especially polypropylene, are due to their high linear expansion coefficient up to max. 40 ° C loadable, since at higher temperatures stresses occur due to changes in length, which lead to deformation and impermissible voltages.

According to patent specification 145 641 a lining with polypropylene is described, in which by vertically arranged, unilaterally raised I-seams expansion fields are formed, which compensate for changes in length occurring at higher temperatures. The lining is hereby drawn in a U-shape over the metallic edge of the container, with a gap between the lining and the container

From 3 to 8 mm, so that the strain fields are not affected «With this shape of the container edge or its sheathing, however, its vertical load is not possible because the sheath migrates vertically at temperature load by length change vertically upward and thus unacceptable stresses under load causes in the upper region of the lining or in the sheath of the container edge.

The aim of the ^e rfindung

The invention has for its object to provide a container liner, in particular a shape of the sheath of the container edge of polyolefins for metallic containers for holding aggressive media with working temperatures up to 100 C, which allows the container edge can be charged with vertically acting forces, without that the changes in length resulting from the linear expansion coefficients in conjunction with temperature increase cause impermissible stresses in the upper region of the lining or in the casing of the container rim.

Explanation of the essence of the invention

According to the invention the object is achieved by a polyolefin, preferably polypropylene existing thin-walled and thus elastic liner, is loosely inserted into a steel container, the upper edge of which ends below the upper edge of the steel container, and its longitudinal walls a distance from the steel container of 0.6 - , 3 % of the container width and its end walls have a distance to the steel container of 0.2 - 0.25 % of the container length, without the longitudinal and end walls receive additional support, The side walls of the liner are only partially at liquid load due to their deflection pressed and thus supported the container wall of the metallic container, the system increases with increasing temperature load and thus degrades the load on the corner joints as the strength of the polyolefins decreases with increasing temperatures, simultaneously formed between the corners of the liner very large strain fields, which allow an all - round extension of the liner and thus the

Prevent the occurrence of impermissible stresses in the liner and its welded joints.

In order to allow a vertical load on the container edge, without affecting the all-round expansion of the liner, is pulled over the upper edge of the liner, under a preferably 10 ° to 20 ° to the wall-sloping leg of a running in the form of a trapezoid shell of the container edge and connected to the liner with a HV seam. Between the bending edge and Linerwandung there is a horizontal distance of preferably 5 to 20 mm. The horizontal lying on the edge of the container shell is conveniently up to max. 10 folded upwards. Due to the resulting leverages a vertical extension of the liner is guaranteed.

With the solution according to the invention, a container lining, in particular a form of casing of the container rim for metallic containers for receiving aggressive media with working temperatures up to 100 C has been created, which enables the container rim to be subjected to vertically acting forces. This design is free from the disadvantages of the previously known solutions and with minimal manufacturing and assembly costs produced.

embodiment

The invention will be explained in more detail with reference to an embodiment.

In the accompanying drawing Fig. 1: the side view of a portion of a steel container with inserted liner and sheath of the container edge is shown in section.

In Fig. 1, a steel container 1 with the loosely inserted, thin-walled and thus elastic liner 2, which consists for example of polypropylene, is shown. The liner 2 with the casing 3, the container edge 4- can be loaded up to 100 C, since the length changes occurring due to the high expansion coefficient in connection with the temperature load of the liner in its 3 axes are made possible by the side walls of the liner 2 to the steel container 1 10th mm distance and the end walls of the liner 2 to the steel container 1 5 mm apart, without an additional Ab-

to get support. With increasing temperature, the liner 2 can expand on all sides. In order to allow a vertical load F of the container edge 4 ·, without affecting the all-round expansion of the liner 2, 10 to 20 mm above the top of the liner, one preferably from 10 to 20 towards the wall tending one leg in the form of a trapezoid running jacket 3 of the container edge 4- pulled and connected to the liner 2 with a HV seam 5. In conjunction with the distance of the bending edge of the liner wall and the inventively executed edging horizontally on the container edge 4 · resting shell 3 arise leverages that allow to compensate for vertically occurring expansions of the liner. The container edge 4 can thus be charged with vertically acting forces without undue stresses in the upper region of the liner 2 or the casing 3 cLes container edge 4- occur.

Claims (1)

Erf indangsa nspruc h Polyolefinauskleidung for higher working temperatures and vertically loaded container edges to accommodate aggressive media, a polypropylene existing, thin-walled and thus elastic liner is loosely inserted in a steel container, without the longitudinal and end walls receive additional support, characterized in that over the top edge of the liner is drawn at 10 ° to 20 ° to the wall-sloping leg of a running in the form of a trapezoid shell of the container edge and connected to the liner with a HV Haht, the bending edge of the liner wall has a distance and the horizontal lying on the container edge sheath is folded up to max. 10 ° upwards.