The present invention is directed to a filter device for filtering flowing liquids with a vessel and a compressible filter medium which is arranged in the vessel along a central flow channel or conduit and which is arranged between an inlet area and an outlet area in the main flow direction, and with a vessel cover in which the inlet area and the outlet area are integrated.
A filter device of the type mentioned above is known in general from the prior art. Filter devices of this type have the disadvantage that they are difficult to clean. The filter devices are used in ponds to filter suspended matter out of the pond water. Therefore, the filter medium becomes stopped up with impurities over time, so that it is necessary to clean the filter medium. In order to clean the filter medium in prior art filter devices, it is necessary to disassemble the filter device and to clean the filter medium while it is removed from the filter device.
This process is time-consuming, complicated and can also result in damage to the filter device and filter medium.
Therefore, it is the object of the present invention to provide a filter device of the type mentioned above which is simple to clean and does not need to be disassembled for the purpose of cleaning.
This object is met according to claim 1 in that the central flow conduit is constructed with a first holding surface for the filter medium upstream and with a second holding surface for the filter medium downstream, wherein the first holding surface and the second holding surface are in operative connection with one another by means of an actuating element in such a way that the relative distance between the two holding surfaces can be varied.
With the present invention, it is now possible to compress and decompress the filter medium in its working position when needed by changing the distance between the holding surfaces. By compressing, impurities in the filter medium are pressed out along with the liquid present in the filter medium and enter the central flow conduit.
The distance between the two holding surfaces can be reduced selectively by pressing the upper holding surface in the direction of the lower holding surface or by pulling the lower holding surface in the direction of the upper holding surface.
Further advantageous features of the present invention are indicated in subclaims 2 to 6.
The cleaning of the filter device according to the invention by compressing the filter medium is advantageously supported by a multifunction regulator according to one of claims 7 to 12. In the positions according to claim 8, the multifunction regulator makes it possible for the flowing medium to flow on three flow paths through the filter device. The normal main flow path allows filtering of the flowing medium, a second flow path allows back-rinsing of the filter device and a third flow path allows clear-rinsing of the filter device. In addition, the arrangement of the multifunction regulator in the vessel cover of the filter device allows the multifunction regulator to be manufactured with tolerances because possible small leaks occur in the interior of the vessel due to dimensional tolerances and do not present any disadvantages to be prevented. In addition, costly pipe laying can be dispensed with due to the flow paths in the vessel cover.
The above-stated object is further met according to claim 13 in that the outlet area has a first runoff opening to a pond and a second runoff opening to a conduit and in that a multidirectional or multipath regulator is arranged in the vessel cover and is selectively displaceable in such a way that three flow paths can be adjusted:
An embodiment form of the present invention will be described more fully in the following with reference to the drawings.
a, 3b and 3c show schematic top views of a multifunction regulator according to the present invention in three different positions.
A filter device 1 comprises a vessel 3 and a vessel cover 5. An inlet area 7 and an outlet area 9 are formed in the vessel cover 5. The outlet area 9 comprises a first runoff opening 9.1 to a pond and a second runoff opening 9.2 to a conduit. The inlet area 7 comprises an inlet opening 7.1 which is connected to a pump by a hose, a line or the like and by which, e.g., the pond water to be filtered can be pumped into the filter device 1. A central flow conduit 11 is formed as a filter connection piece in the vessel 3, i.e., the circumference of the filter connection piece is slotted, perforated or the like.
In the vicinity of the vessel cover 5, that is, at the top in
In another embodiment form, the upper, first holding surface 13 can also be arranged so as to be longitudinally displaceable at the circumference of the central flow conduit 11 and the lower, second holding surface 15 is fixedly arranged at the circumference of the central flow conduit 11. In this case, the actuating element 17 is then also fixedly connected to the upper, first holding surface 13, so that the first, upper holding surface 13 can be pushed in the direction of the lower, second holding surface 15 by actuating the actuating element 17.
In other embodiment forms, it is conceivable that the first holding surface 13 is formed by the vessel cover 5 in case of actuation by pulling and that the second holding surface 15 is formed by the vessel bottom in case of actuation by pushing.
The vessel cover 5 has an upper cover 5.1 and a lower cover 5.2. A multipath regulator 21 (
In a first position of the multipath regulator 21 (
The installation of the multipath regulator 21 in the vessel cover 5 allows a certain leakage to occur in the multipath regulator 21 which comprises cock taps. This leakage remains in the vessel 3 and reaches the first or second runoff opening 9.1, 9.2 by one of the plurality of paths.
The vessel 3 has an inner wall 3.1, the filter medium 17 is disposed at a distance therefrom. Therefore, a flow conduit 23 is formed between the filter medium 17 and the inner wall 3.1. This flow conduit 23 extends along the entire height of the filter medium 17 and runs concentric to the central flow conduit 11.
In an alternative embodiment form, the cleaning can be carried out chiefly through actuation of the multipath regulator 21 and can be supported through the holding surfaces 13, 15 and the actuating element 17. This is expressed in claims 11 to 19.
Number | Date | Country | Kind |
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101 42 092.7 | Aug 2001 | DE | national |
Filing Document | Filing Date | Country | Kind |
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PCT/DE02/03163 | 8/28/2002 | WO |