DE29601068U1 - Drain edge with automatic adjustment - Google Patents

Description

Niehues, Konrad, Südring 32, 46342 Velen-Ramsdorf "Drain edge with automatic adjustment"

The innovation concerns an arrangement under the generic term of

Claim 1. Depending on the filling level of the sump, a readjustment of the drainage edge is necessary in such arrangements: With a steep drainage edge, not only is the height difference to be overcome between the clarifier and the sump greater, but the flow speed of the

The water flowing over the discharge edge is reduced, so that a jet effect is also reduced, which carries away sludge floating on the water and therefore leads to a faster filling of the sump with a flatter discharge edge. Depending on the pump capacity in the

It is therefore necessary to frequently adjust the angle of the discharge edge in the sump to enable effective removal of floating sludge and to keep the filling level in the sump within an optimal tolerance range.

The innovation is based on the task of enabling low-maintenance and automatic adjustment of the angle of the drainage edge.

This task underlying the innovation is carried out by a

Arrangement with the features of claim 1.

In other words, the innovation proposes to adjust the angle of attack of the discharge edge depending on the FQII level in the sump by installing a floating

body or buoyancy body is arranged, which acts on the discharge edge via a corresponding connection and automatically adjusts the angle of the discharge edge depending on the filling level of the sump. In this way, a pendulum in the discharge edge between a steep and a flat

angle of attack, which automatically adjusts after filling

level in the sump so that an optimal filling level in the sump and thus optimal effectiveness of the floating sludge removal is always possible without manual adjustment of the drain edge.
5

Advantageously, levers can be provided as connecting means between the buoyancy body and the discharge edge, whereby these levers allow an adjustment of their effective lever length. This makes it easy to carry out a basic adjustment of the entire arrangement by

a certain minimum level in the sump, a flat alignment of the discharge edge can be set, which allows the sump to be filled to a level that exceeds the pumping capacity of the floating sludge pump arranged in the sump, so that the water level in the sump with this position of the discharge edge long

sam rises. When a predetermined maximum level is reached in the sump, the buoyancy body raised in this way can set the discharge edge so steeply that the amount of floating sludge entering the sump at this position of the discharge edge in relation to the delivery capacity of the pumps arranged in the sump

pe is lower, so that the level in the sump gradually drops.

Such an adjustment of the lever ratios can be achieved in a simple manner for the proposed arrangement by the levers of the adjustment device having several

Have holes arranged in length to which additional rods or levers can be arranged. This allows the effective lever length to be adjusted on the one hand and the individual components of the adjustment device to be securely fixed on the other.

An example of the innovation is explained in more detail below using the drawing.

1 is a clarification tank in which a swimming

sludge removal device 2 is provided for removing the floating sludge. The floating sludge removal device 2 is arranged so that it can move on rails 3. It comprises a sump 4, which is designed as a basin within the water of the clarification tank 1. A pump 5 is installed within the sump 4.

which transports the floating sludge collected in the sump 4 through a pumping line 6 to a downstream central structure of the sewage treatment plant.

The floating sludge flows from the clarifier 1 into the

Sump 4 over a run-off edge 7, which is shown in the drawing in two different positions, namely with solid lines in a flat position and with dashed lines in an inclined position with a relatively steep angle of attack.

To change the angle of attack of this run-off edge 7, an adjustment device 8 is provided, which comprises several levers and joints, in particular a central adjustment lever 9, which is mounted centrally and extends on the one hand to further connecting levers, which are connected to the run-off edge 7.

and which on the other hand extends to further connecting rods or levers which are connected to a buoyancy body 10.

The buoyancy body 10 has a height within the sump

4, which depends on the filling level of the sump 4. With a given delivery capacity of the pump 5 and with an initially low filling level within the sump 4, the buoyancy body 10 is arranged correspondingly low. Via the adjustment device 8, it causes a flat arrangement of the outlet

edge 7, so that including the mentioned nozzle effect, the introduction of the floating sludge into the sump 4 is supported and made possible to an extent that exceeds the pumping capacity of the pump 5. The filling level within the sump therefore rises and thus raises the buoyancy body 10

up.

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By raising the buoyancy body 10, the angle of attack of the run-off edge 7 is automatically changed by means of the adjustment device 8, namely to a steeper angle of attack, as indicated by dashed lines in the drawing. Here

This reduces the amount of floating sludge flowing into the sump 4; if necessary, to a level that is below the pump capacity. As a result, the filling level in the sump 4 gradually drops until the flat arrangement of the discharge edge 7 mentioned at the beginning is reached again

and the entire cycle described begins again. This causes an automatic pendulum movement of the discharge edge 7, which, depending on the pump capacity, enables the most effective possible removal of floating sludge and keeps the filling level in the sump 4 at a predetermined optimal level.

area holds.

A basic setting for adjusting the angle of attack of the run-off edge 7 to the respective height of the buoyancy body 10 can be achieved by the different articulation points on the central

tral lever 9. These different articulation points are simply designed in the form of holes in the lever 9, which allow a different effective lever length, which at the same time ensures a very secure and adjustable fastening of the subsequent levers or rods.

as well as a robust and cost-effective construction of the entire adjustment device 8.

Claims (3)

HABBEL & HABB-&L'··· ·* »· dip.l^jmq. h.-q. habbel PATENT ATTORNEYS DIPL.-INQ. LUTZ HABBEL PO Box 3429 ♦ 48019 Münster EUROPEAN PATENT ATTORNEYS DIPL.-QEOQR. PETER HABBEL TELEPHONE (0251) 535 780 ♦ FAX (0251) 531 OUR FILE: (please fish! N44/18560 Iu/Sc Muenster, 22.01.96 Niehues, Konrad, Südring 32, 46342 Velen-Ramsdorf "Drain edge with automatic adjustment" Protection claims: 1. Arrangement for removing floating sludge from water purification plants, with a clarifier and with a sump separate from the clarifier for collecting floating sludge, wherein the sump is separated from the clarifier by a running edge which runs along the water surface and over which the floating foam flows into the sump, the running edge being pivotably mounted about its longitudinal axis, characterized in that in the sump (4) a buoyancy body (10) is provided and the adjustment device (8) of the running edge (7) is effectively connected to this buoyancy body (10) in such a way that at a higher position of the buoyancy body (10) the running edge (7) is arranged steeper than at a lower position of the buoyancy body (10). 2. Arrangement according to claim 1, characterized in that the adjusting device (8) of the run-off edge (7) comprises articulated levers (9) whose effective lever length is adjustable. 3. Arrangement according to claim 2, characterized in that the levers (9) have several bores along their length for fastening to hinge points or to subsequent levers or rods.