The invention relates to a horizontal agitator for producing a flow in a clarifier according to the preamble of Patent claim 1.
Such a horizontal agitator is known from WO 2008/101633 A1. The known horizontal agitator is received on a slide, which is movable vertically along a pillar-like frame. With the known horizontal agitator it is possible to produce a horizontal flow directed in the direction of the frame with a good level of efficiency. Nevertheless, there is the need to further improve the efficiency of the production of the horizontal flow.
The object of the invention is to overcome the disadvantages according to the prior art. In particular, a horizontal agitator is to be specified that enables the production of a horizontal flow with further improved efficiency.
This object is achieved by the features of claim 1. Expedient embodiments of the invention will emerge from the features of claims 1 to 7.
In accordance with the invention it is proposed for the submersible motor to be supported on a bottom of the clarifier via at least two first flow guide elements. Since two first flow guide elements are now used to support the submersible motor, it is possible to dispense with the frame known in accordance with the prior art for supporting the submersible motor.
As a result, the flow resistance caused by the frame is omitted. The proposed horizontal agitator enables a particularly efficient production of a horizontal flow. In addition, it can be produced easily and cost-effectively. The term “axial plane” is understood to mean a plane that contains the substantially horizontally running axis of the propeller.
In accordance with an advantageous embodiment, the first flow guide elements are interconnected via at least one carrier plate receiving the submersible motor. The first flow guide elements each extend from the carrier plate at an angle from 90° to 140°, preferably 100° to 120°. In particular if the flow guide elements extend such that they point away from one another at an angle of more than 90° from the carrier plate, a particularly stable support of the submersible motor can be achieved.
In accordance with a further advantageous embodiment, the first flow guide elements and/or the at least one carrier plate is/are produced from folded sheet metal. In particular, it has proven to be advantageous to form the first flow guide elements and/or the at least one carrier plate in a double-walled manner from folded sheet metal. In the case of a double-walled design, apertures for avoiding air pockets within the double wall are provided in at least one of the walls of the double wall.
In accordance with a further embodiment, the first flow guide elements are interconnected on the bottom side via at least one connection element. The at least one carrier plate, the first flow guide elements extending therefrom and the at least one connection element thus form a tunnel-like structure, which is particularly stable.
In accordance with a further embodiment, a second flow guide element is provided, which extends in a direction pointing away from the bottom of the clarifier from a supporting structure installed on the carrier plate or from the submersible motor. The provision of the second flow guide element contributes to an improved orientation of the horizontal flow.
In accordance with a particularly advantageous embodiment, the carrier plate with the first flow guide element installed thereon forms a mount, on which an assembly unit formed from the submersible motor and the propeller is detachably fastened by means of a coupling device. The assembly unit expediently also comprises the second flow guide element. The detachable fastening of the assembly unit on the mount enables a particularly simple maintenance and/or repair of the assembly unit. The assembly unit can be detached from the mount for example by means of a cable winch and can then be raised into a position above a level of wastewater received in the clarifier.
An exemplary embodiment of the invention will be explained in greater detail hereinafter on the basis of the drawings, in which:
With the horizontal agitator shown in the figures, a propeller 1 is connected via a gearing 2 to a submersible motor 3. The submersible motor 3 is operated in such a way that a flow directed from the propeller 1 to the submersible motor 3 is produced.
Plate-shaped flow guide elements 5, 7 are provided downstream of the propeller 1 and extend in an axial plane (AP) running substantially parallel to the propeller axis (PA).
The propeller 1, together with the submersible motor 3 and any provided gearing 2, forms an assembly unit that is supported on a front carrier plate 4a and a rear carrier plate 4b. First flow guide elements 5 extend from both the front carrier plate 4a and rear carrier plate 4b at an angle from approximately 100° to 120°. The first flow guide elements 5 are formed in a plate-like manner. The planes thereof run approximately parallel to an axis of the propeller 1.
The front carrier plate 4a and the rear carrier plate 4b and the first flow guide elements 5 are advantageously produced from folded sheet metals. To improve the stability, the carrier plates 4a, 4b and/or the flow guide elements 5 are double-walled. Here, the folded sheet metals are expediently connected by means of rivets. A mount A produced in this way has excellent stability.
In the region of the bottom B of the clarifier, the first flow guide elements 5 are expediently connected to a front connection element 6a and a rear connection element 6b. The front connection element 6a and the rear connection element 6b each have a flat incident-flow face and downstream a steeply sloping flow-off face.
The assembly unit denoted by reference sign M has a second flow guide element 7, which extends vertically above the submersible motor 3 and has a curved incident-flow edge.
The assembly unit M is detachably connected to a mount A, which comprises the carrier plates 4a, 4b, the first flow guide elements 5 extending therefrom and the connection elements 6a, 6b. To detachably connect the assembly unit M to the mount A, a first coupling element 8a and a second coupling element 8b are installed on the front carrier plate 4a and on the rear carrier plate 4b. A third coupling element 9a corresponding to the first coupling element 8a and a fourth coupling element 9b corresponding to the second coupling element 8b are installed on the mounting element M.
Reference sign 10 denotes a cable. A guide 11, preferably a slotted guide, by means of which the assembly element M is guided along the cable 10, extends from the second flow guide element 7.
To lift the assembly unit M, a further cable 12 can be fixed at the assembly unit M. By exerting a tensile stress by means of the further cable 12, a coupling between the mount A and the assembly element M caused by the coupling elements 8a, 8b, 9a, 9b can be detached, and the assembly element M can be guided along the cable 10 and lifted from the clarifier.
As can be seen from
Also, second flow guide element 7 extends in a direction pointing away from the bottom of the clarifier from a support structure (S) installed on front carrier plate 4a and rear carrier plate 4b or from the submersible motor 3.
Number | Date | Country | Kind |
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10 2012 205 577 | Apr 2012 | DE | national |
Filing Document | Filing Date | Country | Kind |
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PCT/EP2013/055837 | 3/20/2013 | WO | 00 |
Publishing Document | Publishing Date | Country | Kind |
---|---|---|---|
WO2013/149833 | 10/10/2013 | WO | A |
Number | Name | Date | Kind |
---|---|---|---|
4566801 | Salzman | Jan 1986 | A |
8210738 | Hoefken | Jul 2012 | B2 |
20100066089 | Best | Mar 2010 | A1 |
20100133174 | Hoefken | Jun 2010 | A1 |
Number | Date | Country |
---|---|---|
102007008135 | Apr 1974 | DE |
19501414 | Jul 1996 | DE |
19620986 | Sep 1997 | DE |
2008101632 | Aug 2008 | WO |
2008101633 | Aug 2008 | WO |
Entry |
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PCT, “International Preliminary Report on Patentability for International Application No. PCT/EP2013/055837.” |
PCT, “International Search Report for International Application No. PCT/EP2013/055837”. |
Number | Date | Country | |
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20150078121 A1 | Mar 2015 | US |