DK200800085U3 - Light and firm cover for slurry tanks - Google Patents

Description

DK 2008 00085 U3

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. 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, steel, fiber composites or the like), a weather-resistant 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 roof cassettes ..... and thus a long span.

The roof cassettes will, in certain embodiments, lie on the upper edge of the container, via a suitable structure, together with one or more columns usually placed centrally in the tank, so that the support is centrally higher than the edge of the tank, thereby ensuring a fall away from the tank.

In embodiments where very large tanks are used or where it is desirable to utilize weaker roofing cassettes, each cassette can be supported between the edge of the tank and the column via a bar system. In this embodiment, one or more higher columns are used in the tank, with a portion of the columns projecting over the top surface of the roof. The cables in the form of steel cables or the like are fastened in predetermined and cast / mounted fittings on the upper side of the roof cassettes, so that a number of supports are created between the edge of the tank and the column. The roof cassettes can advantageously be provided with reinforcements which can distribute the load from the point of attack of the cage. to a larger portion of the roof cassette.

2 DK 2008 00085 U3

The overhead system is an affordable one! alternative to the known concrete element decks, and is purely durable an alternative to known lightweight PVC coverings, which is the most widely used today.

concept:

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

A center column - cf. A.

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),

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 - section B are supported.

The size of the body / wreath is adapted to the size of the roof (from 1.0 in 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 cassettes-see. 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 no. 3 - 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 resistant to sulfuric acid - cl. e.

Between the top and the blind plate, the cut polyurentane material is used - 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, spot 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.

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

Figures 5 and 6 show a further embodiment of the production wherein the column A is designed with a height above the roof cassettes B and that on the upper side of the cassettes, mounting points 10 are incorporated in the example shown in two concentric rows with different distance to the center. Between the fastening points 10 and the top 11 of the column are tensioned steel wires 12 which support the roof cassettes B. in whole or in part. The fastening points can be part of a support frame placed on top of the cassettes, the carrier frame being suitably fastened to the cassettes. This is particularly interesting where the number of wires required is less than the number of cassettes.

News:

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

Use lightweight roof cassettes designed as layer cake pieces.

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 light roof cassettes built as sandwich construction, which has a long span (up to 15 m).

DK 2008 00085 U3 4

Attaching individual lightweight roof cassettes to a center column and to the top of the tank wall Lower slope than known lightweight PVC coverings (typically 15-20 degrees)

Claims (9)

A modular cover cassette for covering basins and tanks, consisting of a relatively hard upper and a lower bowl, between which is provided a light material, each element being dimensioned to be supported along two opposite ends. A cover cassette according to 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 semi-circular cover. The overlay cassette of claim 1, wherein each cassette has a rectangular shape such that a plurality of elements can be assembled into a rectangular overlay. The cover cassette of claim 1, wherein the lightweight material is a foam material, preferably polyurethane foam. Covering cartridge according to one or tens of the preceding claims, wherein one or more supporting beams are provided, which span between the two supported ends of the cassette. 5 DK 2008 00085 U3 Covering cassette according to one or more of the preceding claims, wherein on the upper side of the cassette between the two ends of the support one or more fastening points are provided, suitable for fastening a bar down. An overlay system consisting of a support column and a plurality of modular overlay cartridges according to one or more of claims 1 to 6, 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 that means are provided on the support column at the top for supporting the overlay cassettes, which cassettes are supported on or along the edge of the tank and by the supporting column. DK 2008 00085 U3 6 An overlay system according to claim 7, wherein two supporting columns located at a distance for covering an oval or elongated tank are used and a bar is provided between the columns at the top, Cover system according to claim 7 or 8, wherein the column has a height above the roof cassettes and where between the top of the column and one or more fastening points on the upper side of the roof cassettes, bar cushions are arranged which fully or partially support the respective cassettes.