EP2871296B1 - Filter substrate trough element and filter substrate trough system - Google Patents

Description

The present invention relates to a Filterubstratrinnenelement for discharging and cleaning of surface water, according to the preamble of claim 1 comprising a first channel body with a arranged in an inlet space filter substrate and a below the filter substrate through an intermediate level of the inlet space separate drain space, the drain space of a separate second gutter body is formed, which is closed on the inlet side with a the intermediate plane forming, at least partially permeable to water, gutter bottom of the first channel body.

Furthermore, the invention relates to a filter substrate inner system for the construction of such a filter substrate inner element.

From the US 5,391,295 A. a filter substrate element for discharging and cleaning of surface water is previously known, in which the incoming surface water first enters an inlet space in which a filter substrate is arranged, which then passes into a arranged below the inlet space drainage space, which is separated by an intermediate level of the inlet space is. However, this filter substrate element is not channel-shaped.

A comparable Filterubstratrinnenelement is also from the EP 2 660 400 A2 previously known.

Another solution comes from the DE 10 2011 001 356 A1 which relates to a seepage arrangement, in which a water-permeable support element is drawn into a gutter body, on which a bed of filter substrate is arranged. The incoming water, which enters, for example via the gutter cover in the interior of the gutter body, penetrates the filter substrate and the water-permeable support member in the direction of the drainage space formed below the support element is penetrated. Out of the drainage chamber, the filtered water can drain away easily. Incidentally, the inlet region of this infiltration arrangement is provided with an additional drain pipe whose inlet is arranged above the filter substrate. With this bypass, surface water can be discharged unfiltered directly into the sewage system when a defined backwater level is exceeded.

Furthermore, from the DE 101 36 161 A1 a water conduit element previously known, in which the gutter body is divided into two by a horizontal perforated intermediate level, with the effect that large-scale, entrained with the introduced surface water sediments and floating particles remain in the upper channel section and be discharged with this in the direction of flow. A filter substrate is not present in this arrangement.

Troughs for surface drainage of this type have been known for some time in the prior art. For example, the EP 2 080 840 B1 a Filterubstratrinne, in which a drainage chamber is formed by a permeable, inserted into a gutter body filter tube. The incoming water into the channel body is then first cleaned by the filter substrate surrounding the filter tube and then runs more or less from all sides into the filter tube, which forwards the water over the side edges or the front side of the channel body.

A similar solution sees the DE 10 2012 001 574 A1 before, in which a filter cartridge is used, which practically encloses the filter substrate. The filter insert forms a drainage space with the gutter body and can be removed completely as an insert with the filter substrate. The incoming water penetrates the outer wall of the filter insert, passes through the filter substrate located therein and exits from the filter insert on the underside in the direction of the drainage space. Here, an elaborate coarse filter is additionally used.

All solutions of the prior art are relatively complex formed and consist of a variety of individual parts that are laborious and costly both when installed on the site and in maintenance. The present invention has the object of finding a solution with fewer parts, which makes it considerably more economical and considerably simpler to install and maintain, while at the same time providing the same or better cleaning performance. Likewise, the invention has the object to more effectively use the space enclosed by the gutter body, which is installed in the prior art at the expense of the storage capacity with the filter devices. Furthermore, the invention has the object to solve the partial flow treatment of precipitation water easily and effectively.

This is achieved by a Filterubstratrinnenelement according to the features of claim 1. Such Filterubstratrinnenelement can be further developed by the features of the dependent claims 2 to 8 meaningful. Furthermore, this is achieved by a filter substrate inner system according to the features of the system claim 9, which in turn can be further developed by the features of subclaim 10.

According to the invention, instead of a single channel body in which both the filter substrate and the drainage chamber in different Way can be formed to provide a separate drainage chamber, which is arranged by a second channel body below the first channel body, which forms an inlet space. The second channel body is in this case closed by the first channel body whose channel bottom on the second gutter body is attached. The surface water entering the first channel body in this case passes through the filter substrate arranged on the bottom of the first channel body and will enter the second channel body through bottom-side openings of the first channel body. For this purpose, the channel bottom of the first channel body is to make at least partially permeable to water, in particular to provide openings. Such openings may in this case be closed by a filter grid, which is permeable to water but impenetrable to the filter substrate itself, so that the filter substrate is prevented from falling into the second channel body. Furthermore, it is provided according to the invention to arrange an overflow pipe in the inlet space in order to be able to discharge surface water which accumulates suddenly to a great extent. Such an overflow pipe is here erected vertically in the first channel body and has an upper edge in the maximum filling height of the channel body. The overflow pipe can in this case open directly into the drainage chamber, so that in this way, in the event of an emergency overflow, the unfiltered water can be mixed with the filtered water in the drainage space and discharged therefrom.

In this solution, it is only necessary at the construction site, to lay the filter fabric housings supplied in one piece as normal drainage channels, fill in the upper gutter body the filter substrate and connect to the continuing lines Such a solution is very easy to maintain, as by simply removing a Gutter cover immediately access to the filter substrate can be created and the filter substrate can be replaced if necessary. Also, by the said filter grid a downslope of the filter substrate is avoided in the second channel body, so that a cleaning of the second, including mounted gutter body can be omitted more or less. This is also rinsed by the effluent, filtered surface water. Removable inserts, which would need to be replaced if necessary or should be properly positioned for proper operation, are not used here, so that the mounting of such a filter substrate channel of several Filterubstratrinnenelementen such described can be made simple and inexpensive. In addition, by the double laying of gutter elements whose capacity is significantly greater than that provided in the prior art, where a channel of large nominal size is significantly reduced by the filter arrangements provided therein in their capacity.

In a meaningful development of such a filter substrate channel, the individual elements are formed such that the channel bottom of the first channel body can be connected to the receptacle of the channel cover of the second channel body. The inclusion of the gutter cover of the second gutter body would be used in the usual installation to attach a cover on the gutter, for example in the form of a cover grating. However, the same receptacle of the channel cover can also be used in the installation according to the invention to hold the channel bottom of the overlying first channel body so that a defined position with respect to the two channels arises. In this case, it is irrelevant whether the first channel body has a larger or smaller nominal diameter or, preferably, has the same nominal diameter as the second channel body.

Preferred dimensions, the underside of the channel body is formed closed, so that any connection adapter can be omitted. The connection is then simply by riveting or screwing, or if necessary, by bonding.
The openings in the bottom region are preferably round and, as already explained, provided with an effective filter grid, so that no filter substrate can penetrate into the second channel body. The number and size of openings is calculated based on the filter performance of the system. The backflow volume in the filter substrate channel also plays an important role here. High backflow volume acts as an intermediate buffer for wastewater. For the accumulated filtered water, it may even be sufficient to select a smaller or smaller in volume or second gutter body unit.

In a further embodiment of a Filterubstratrinnenelements according to the invention can be created by additional use of a filter mat or filter plate in the bottom region of the first channel body, an additional reservoir in the outflow. This effectively increases the drainage performance of the assembly.

The filter substrate inner elements have with some advantage in the region of the second channel body at least one side outlet, via which the resulting, filtered surface water can be removed. Such horizontal connection options are an important advantage, since a connectability in different directions is guaranteed. The connections advantageously provide a connection with common sewer or drainage pipes.

In this case, the vertically upright overflow pipe can be discharged via a side drain of the first channel body and in this case either forwarded separately or be fed outside the Filterubstratrinnenelements via a merger together with the filtered water from the drainage chamber drains.

A filter substrate inner system for constructing a filter substrate inner element, from which a filter substrate channel can be created, accordingly comprises a first channel body with a water-permeable channel bottom, and a second channel body, which can be connected in its inlet region with the channel bottom of the first channel body. By a simple superposition of the two gutter body a multi-level gutter is created, in whose first, thus above lying gutter element a filter substrate is introduced. The filter substrate to be introduced, for example, in the European patent application EP 2 402 067 A1 have demonstrated quality with which good results have been achieved. It has been found that this filter substrate forms a so-called filter cake in the upper region during operation due to its special grain composition. This filter cake builds up over time and ensures additionally for retention and binding performance of solids and pollutants. By using a filter substrate of this type for the filtration with high binding capacity for dissolved inorganic pollutants cost-effective maintenance is possible by simply peeling off the costs incurred at the surface of the filter substrate amounts of solids and pollutants.

It is within the scope of the invention possible to use the Filterubstratrinnenelemente very easy for a partial flow treatment. Normally, the surface water is only filtered in seepage systems or discharged directly into the sewer system. In the case of the partial flow treatment, on the other hand, only part of the surface water is filtered and one part is passed on unfiltered.

With the present filter substrate inner system, it is possible to filter a precalculated volume of the resulting surface water and to remove the other part of the calculated total volume unfiltered. The system meets the requirements for precipitation drainage in the separation system.

In the following, an embodiment will be explained in more detail.

• Figur 1 ein Filtersubstratrinnenelement ohne eingefülltes Filtersubstrat ohne Überlaufrohr und Seitenablauf in einer perspektivischen Darstellung von schräg oben,
• Figur 2 ein Filtersubstratrinnenelement wie in Figur 1 in einer Querschnittsdarstellung, mit eingefülltem Filtersubstrat,
• Figur 3 das Filtersubstratrinnenelement gemäß Figur 2 mit einer zusätzlichen Filtermatte,

Show it

• FIG. 1 a Filterubstratrinnenelement without filled filter substrate without overflow pipe and side drain in a perspective view obliquely from above
• FIG. 2 a filter substrate inner element as in FIG FIG. 1 in a cross-sectional view, with filled filter substrate,
• FIG. 3 the filter substrate inner element according to FIG. 2 with an additional filter mat,

In the following an embodiment according to the claimed invention is explained in more detail:

• Figur 4 das Filtersubstratrinnenelement gemäß Figur 3 mit einem seitlichen Ablauf des zweiten Rinnenkörpers und einem in dem Einlaufraum des ersten Rinnenkörpers installierten Überlauf,
• Figur 5 ein Filtersubstratrinnenelement gemäß Figur 4 für Teilstrombehandlung mit zusätzlicher Zusammenführung von gefiltertem und ungefiltertem Oberflächenwasser,
• Figur 6 ein Filtersubstratrinnenelement mit einer alternativen Lösung für Teilstrombehandlung.

Show it:

• FIG. 4 the filter substrate inner element according to FIG. 3 with a lateral drainage of the second channel body and an overflow installed in the inlet space of the first channel body,
• FIG. 5 a filter substrate inner element according to FIG. 4 for partial flow treatment with additional combination of filtered and unfiltered surface water,
• FIG. 6 a Filterubstratrinnenelement with an alternative solution for partial flow treatment.

FIG. 1 shows a Filterubstratrinnenelement 1, consisting of a first channel body 2 and a second channel body 3. The first channel body 2 is in this case arranged above the second channel body 3, such that in the channel bottom 7 of the first channel body 2 recessed drain pipe 9 open into the second channel body 3 , About side drains 14 and 12, the arrangement of drain pipes or overflow pipes usual nominal width is possible.

FIG. 2 shows the Filterubstratrinnenelement in a lateral cross-sectional view. The first channel body 2 is inserted into the channel cover receptacle 8 of the second channel body 3 and connected by means of a connecting means 17 fixed to a unit. Through the outlet connection 9, surface water from the first channel body 2 can enter the second channel body 3 and be discharged into the second channel body 3. Functionally, first the surface water will flow through the channel cover 15 closing the first channel body 2 into an inlet space 4 formed by the first channel body 2 and there hit the filter substrate 6 arranged on the bottom side in the inlet space 4. After flowing through the filter substrate 6, the surface water in the bottom region of the first channel body 2 is forwarded through the outlet connection 9 into the second channel. By means of a filter grid 10 it is prevented that the filter substrate 6 enters through the connecting sleeve 9 into the second channel body 3 and into the drainage space 5 formed by it. The thus filtered surface water collects in the discharge space 5 and is derived from this in the longitudinal direction of the channel.

In general, via the side outlet 12, the surface water to a percolation device, z.Bsp. Rigole, connected. It would also be possible, as the second channel body 3, an element with a lesser Nominal diameter than that of the first channel body 2 to choose. With regard to the hydraulics, this would be unproblematic because the outflow quantity of the discharge space 5 exceeds the flow rate of the inlet space 4 of the second channel body 3.

In FIG. 3 is unlike Fig. 2 In addition, a filter mat / filter plate 11 with inserted .Thus, the adjustment chamber is enlarged at the outlet port 9 and the flow can thus be faster.

In Figure 4 In addition, an overflow pipe 13 with a side outlet 14 is shown in the first channel body 2. This results in several options for the further use of surface water. The overflow pipe 13 can be connected as an emergency overflow in case of heavy rainfall directly on the side drain 14 to the sewer. Only water which flows off via the side drain 12 of the second channel body 3 connected to a percolation is then filtered. In the sense of the partial flow treatment but both side drains 12 and 14 can be connected to the sewer.

The overflow pipe 13 has a free upper edge, which is arranged at the level of the maximum filling of the first channel body 2. If the water level in the first channel body 2 exceeds the upper edge of the overflow pipe 13, the water will fall into the overflow pipe 13 and be discharged via the side drain 14.

It is now possible, with knowledge of the expected precipitation amounts, the discharge capacity of the filtered surface water, the backwater capacity in the inlet space 4 and the discharge capacity of the overflow pipe 13, to calculate the total discharge capacity of the filter substrate system. Over the free upper edge of the overflow pipe 13, the total discharge capacity can be controlled. The deeper the overflow pipe 13 is arranged in the discharge space 4, the more direct unfiltered is discharged. Conversely, with greater height of the overflow pipe 13 in the exhaust air chamber 4 more filtered surface water is derived.

In Figure 5 In addition, it can be seen how both side drains 12 and 14 are bundled outside the filter substrate channel via a junction 16 in a duct.

In Figure 6 another alternative of an overflow solution is shown. In the case of an overflow, the water in the inlet space 4 enters directly into the overflow pipe 13 and spent without detours in the drain chamber 5 in this configuration.

Thus, what is described above is a filter substrate inner element or a filter substrate inner system, which, in contrast to the prior art, permits a significantly simplified installation at the construction site and a more favorable maintenance. By eliminating the use of additional parts such as filter tubes, filter element carriers and prefilter boxes in the first channel body not only the installation of a filter substrate channel is much easier and cheaper, but it also creates more volume for the filter substrate. This means that the nominal width of the substrate channel can also be reduced. That's another significant cost savings. The multi-storey gutter is installed on site as a normal drainage channel, filled the filter substrate to the predetermined height and made the connections to the underlying, second gutter body. This makes the system functional.

LIST OF REFERENCE NUMBERS

1

Filter substrate trough member

2

first gutter body

3

second gutter body

4

inlet chamber

5

drain space

6

filter substrate

7

channel base

8th

Recording gutter cover and second gutter body

9

drain connection

10

filter grid

11

filter mat

12

page flow

13

Overflow pipe

14

page flow

15

channel cover

16

Sink / merge

17

Connection of both gutters

Claims (10)

1. A filter substrate trough element for draining and purifying surface water, comprising a first trough body (2) with a filter substrate (6) arranged in an inlet chamber (4) as well as a drainage chamber (5) which is separated beneath the filter substrate (6) from the inlet chamber (4) by an intermediate plane, wherein the drainage chamber (5) is formed by a separate second trough body (3) which is sealed on the inlet side by a trough base (7) of the first trough body (2), which trough base forms the intermediate plane and is permeable to water at least in some sections, characterized in that a vertically upright overflow pipe (13) is associated with the inlet chamber (4) of the first trough body (2), and the trough base (7) of the first trough body (2) is connected via a receiver for a trough cover (8) of the second trough body (3) to the same, wherein the second trough body (3) comprises a lateral outlet (12).
2. A filter substrate trough element according to claim 1, characterized in that a force-fitting connection (17) is produced between the trough base (7) of the first trough body (2) and the second trough body (3).
3. A filter substrate trough element according to claim 2, characterized in that one or several drainage nozzles (8) are arranged in the trough base (7) of the first trough body (2).
4. A filter substrate trough element according to one of the preceding claims, characterized in that the trough base (7) of the first trough body (2) comprises at least one opening which is preferably sealed by means of a filter grille (10) which is water-permeable but impermeable for the filter substrate (6).
5. A filter substrate trough element according to one of the preceding claims, characterized in that at least one flat filter element, preferably a filter mat (11) or a filter plate, is associated with the first trough body (2) on the inside in the base region.
6. A filter substrate trough element according to claim 1, characterized in that the overflow pipe (13) opens into the drainage chamber (5) of the second trough body (3).
7. A filter substrate trough element according to claim 1, characterized in that the overflow pipe (13) opens into a lateral outlet (14) of the first trough body (2).
8. A filter substrate trough element according to claim 7, characterized in that the lateral outlet (14) of the first trough body (2) is connected together with a lateral outlet (12) of the second trough body (3) to a drain (16).
9. A filter substrate trough system for constructing a filter substrate trough element (1) according to one of the preceding claims, comprising a first trough body (2) with a water-permeable trough base (7), a separate second trough body (3) which can be connected via its receiver for a trough cover (8) to the trough base (7) of the first trough body (2), and a filter substrate (6) for filling into an inlet chamber (4) enclosed by the first channel body (2), further an overflow pipe (13) for perpendicular elevation in the inlet chamber (4) of the first trough body (2) and for connection with a lateral outlet (16) of the first trough body (2) or the drainage chamber (5) of the second trough body (3), wherein the second trough body (3) comprises a lateral outlet (12).
10. A filter substrate trough system according to claim 9, comprising the trough base (7) with drainage nozzle (9) for connection in the receiver of the trough cover (8) of the second trough body (3) with openings of the first trough body (2) on the bottom side.

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