DK143473B - WATER AND AIR CONTACT BODIES AND BUILT OUT OF THIN CORRECTED PLASTIC PLATES - Google Patents

Description

143473

The invention relates to a contact body for water and air, for example for a cooling rack, and is made up of thin corrugated plastic sheets, which are assembled such that the corrugations in two successive 5 sheets intersect and are in contact with each other.

For contact bodies of this kind, it is important that they are as light as possible because the apparatus, for example a cooling bar or a gas scrubber, in which the contact body is included, often has to be mounted on an roof of an existing building. The corrugation of the plates of which the contact body is composed results in an increase in strength which allows the use of relatively thin and thus lightweight plates.

However, in particular, the edges of the thin plates 15 are subject to damage or undesirable deformation during handling of the individual plates or of the composite contact body during its assembly and as a result of impacts from the large quantities of water passed through the contact body.

In order to alleviate this disadvantage, the invention is that each plate has an edge reinforcement which is formed solely by bending the edge zone of the plate prior to corrugation.

The provision of said edge reinforcements on the sheets by bending the sheet edges prior to corrugation is not only substantially simpler than re-threading or welding of separate reinforcing strips, but first and foremost has the advantage that during corrugation there is a stretch of it. the backs of the curved edge zone, which pulls the edge zone firmly against the non-folded body of the plate. The corrugated edge zone is thus retained in close contact with the rest of the plate due to its internal stresses, without the need for additional mechanical attachment to the body of the plate. Without such a dense system throughout the extent of the edge zone, open pockets could arise at the bottom of the plate, which, under the influence of the water masses downstream of the contact body 5, would lead to a deflection and deflection of the reinforcing edge, the effect of which would be illusory. Practical experience has shown that, even under such severe force effects, the bent and corrugated edge reinforcements retain their original shape in close contact with the surface of each corrugated sheet body.

The invention will now be explained in more detail with reference to the drawing, in which 1 is a perspective view of a section of a plate for a contact body according to the invention; FIG. 2 shows a view of the same plate further formed with drainage tips, viewed from a different angle of view; FIG. 3a, b and c cross-section through three embodiments of the plate edge reinforcements; 4 is a perspective view of a section of a contact body made up of several of the plates shown; and FIG. 5 is a sectional view taken along line 5-5 of FIG. 4th

FIG. 1 shows a plate 10 of plastic material 25 formed with corrugations 12 extending across the plate at an angle to the axis of the plate.

The sheet material used may be e.g. polyethylene, polystyrene, polyamine, polyvinyl chloride or polycarbonate having a thickness in the range of 0.13 mm to 0.64 mm. The plate may be reinforced with asbestos or other fibrous material. The edges of the corrugated plate are formed with edge reinforcements 14 which are formed by the two opposite edge zones of the plate being bent 180 ° before the formation of the corrugations 12 extending across the plate below