DK200800048U3 - Light and firm cover for slurry tanks - Google Patents

Description

DK 2008 00048 U3

Description

The invention relates to a light but solid covering system for use in covering circular, rectangular or differently shaped slurry tanks, basins and the like.

5 The overlay system is based on the use of light roof cassettes (elements) which are placed in layer cake form on the center column and tank wall.

The roof cassettes are prefabricated in a number and lengths corresponding to the given tank diameter, and are constructively based on the use of a combination of supporting beams (wood, 10 steel, fiber composites or the like), a weatherproof top plate and a bottom plate that is resistant to sulfuric acid.

Between the top and bottom plate, foamed polyurentane material is used, which in combination with the built-in beams gives a high bearing capacity of the individual roofing cassettes - and thus a long span.

The roofing system is an inexpensive alternative to the known concrete element decks, and is purely durable an alternative to known lightweight PVC roofing, which is today the most widely used.

20

concept:

In all its simplicity, the roofing system consists of two main components:

A center column - cf. A.

25 The center column is placed on the concrete base of the tank in cases where central reinforcement is built into the same base plate, or mounted on a concrete foundation constructed on top of the base plate itself (for existing tanks made without center reinforcement in the base plate).

30 The center column is made of concrete, steel (corrosion protected) or similar material.

The pillar top is made with a "mushroom head" or a steel wreath, on which the roof cassettes - cl. B is supported.

2 DK 2008 00048 U3

The size of the head / wreath is adjusted to the size of the roof (from 1.0 m to 4.0 m). The column height is calculated as the height of the tank wall plus allowance for the required drop against the tank periphery.

Roof cartridges -jf. drawing 2 pts. B

Roof cassette - designed as a circular section / layer cake piece and with a length of approx. the radius of the tank - which is mounted on the center column and the tank wall respectively in a number appropriate to the diameter of the tank.

The roof cassettes are prefabricated and - cf. Drawing # 3 - are constructively based on the use of a combination of supporting beams (wood, steel, fiber composites or the like) - point c, a weather-resistant top plate - cf. d, and a base plate which is resistant to sulfuric acid - cl. e.

Foamed polyurentane material is used between top and bottom plate - item no. f, which, in combination with the built-in beams, provides sandwich construction with a high bearing capacity of the individual roof cassettes - and thus a long span.

In addition to the two main components, spacers are used - cf. Figure 4 (g) of EPDM (or equivalent) between top of tank wall and underside of roof cassettes, as well as number of fittings for attaching the individual roof cassettes to center column and tank wall respectively.

Finally, a top plate is mounted on the center column, which holds the roof elements in position vertically in the center of the roof.

Operation openings are performed locally in the individual roof cassettes according to the need for access, agitation and emptying.

News: DK 2008 00048 U3 3

Invention of a lightweight and fixed roofing system for circular slurry tanks (and other types of environmental tanks) based on:

Use lightweight roof cassettes designed as layer cake pieces.

5 Construction of roof cassettes in a sandwich construction with light self-supporting system built in a combination of beams, polyurethane foam and top and bottom plate. Use of lightweight roofing cassettes built as a sandwich construction, which has a long span (up to 15 m).

Attaching individual light roof cassettes to a center column and to the top of the tank wall 10 Lower slope than known light P VC covers (typically 15-20 degrees)

Claims (7)

A modular cover cassette for basin and tank cover consisting of a relatively hard upper and a lower bowl, between which is provided a light material, each element being sized to be supported along two opposite ends. The overlay cassette of claim 1, wherein each cassette has the shape of a layer cake piece so that a plurality of elements can be assembled into a circular or semicircular cover. The overlay cassette of claim 1, wherein each cassette is in the form of a rectangle so that a plurality of elements can be assembled into a rectangular cover. The modular cover cassette of claim 1, wherein the lightweight material is a foam material, preferably polyurethane foam. 4 DK 2008 00048 U3 A modular overlay cassette according to one or more of the preceding claims, wherein one or more supporting beams are provided which span between the two supported ends of the cassette. An overlay system consisting of a support column and a plurality of modular overlay cartridges according to one or more of claims 1 to 5, new in that the column is mounted in a tank, basin or the like, preferably centrally in the tank, with an overhead over the top of the tank, and means are provided on the support column at the top for supporting the overlay cassettes which are supported on or along the edge of the tank and by the supporting column. The overlay system of claim 6, wherein two support columns are located at a distance to cover an oval or elongated tank and a bar is provided between the columns at the top for supporting the cartridges.