DE202014011094U1 - Filter substrate trough member - Google Patents

Abstract

Filter substrate inner element (1) for discharging and cleaning surface water, comprising at least one channel body (20) with a filter body (20) arranged in this filter substrate (6) and a below the filter substrate (6) arranged discharge chamber (5), the underside of a, at least partially water-permeable, channel bottom (7) of the channel body (20) is completed, wherein within the channel body (20) an outlet pipe (13) is arranged such that its inlet (21) above the filter substrate (6) is arranged and a passage of the introduced surface water through the drain pipe (13) bypassing the filter substrate (6) to an outlet (22) of the drain pipe (13), characterized in that the above the relative height of the inlet (21) of the drain pipe (13) above the filter substrate (6) within the channel body (20), the amount of unfiltered partial flow with respect to the amount of the filtered partial flow of a guided surface water and thus the respective degree of filtration for the introduced surface water through the Filterubstratrinnenelement (1) by the relative height of the inlet (21) of the drain pipe (13) above the surface of the filter substrate is adjustable, wherein the ratio of the unfiltered partial flow to the filtered partial flow in Dependence on the flow rate of the introduced surface water through the inserted filter substrate and the backflow potential within the channel body (20) on the one hand and the drainage capacity of the drain pipe (13) on the other hand taking into account the expected introduced surface water amount in relation to the hydraulic power of the filter substrate inner element (1) From the nominal diameter or the inlet cross-section, the backwater depth and the discharge cross section of the inserted channel body (20) is dependent, and it can be determined here that the relative minimum height of the inlet fs (21) of the drain pipe (13) above the filter substrate (6) within the gutter body (20) ≥ the cross section of the drain pipe (13) and ≤ the distance of the lower edge of a gutter cover (15) from the upper edge of the drain pipe (13) wherein both the filtered and the unfiltered surface water before or after passing through the channel body (1) via a junction (16) are derived together.

Description

The present invention relates to a filter substrate inner element for discharging and cleaning surface water, comprising at least one channel body with a filter substrate arranged in this channel body and an outlet space arranged below the filter substrate, which is closed on the underside by a groove bottom of the channel body which is permeable to water, at least in regions Channel body a drain pipe is arranged such that its inlet is arranged above the filter substrate and allows passage of the introduced surface water through the drain pipe, bypassing the filter substrate to an outlet of the drain pipe

A seepage arrangement with the features described above is known from DE 10 2011 001 356 A1 previously known.

From the DE 200 12 282 U1 is a road inlet for derived surface water is known in which below a cover an inlet box is arranged, which is at least partially filled with a filter material. In addition, immediately below the cover of the inlet box, a drain pipe is arranged, which is guided vertically through the filter material and is provided in the region of the filter material with a perforation, so that seep due to the slope of the inlet box water from the filter material through the perforation in the drain pipe can be discharged and thereby further in the sewer or in a connected rig system. The upper end of the drain pipe is covered with a lid, passes through the overflowing water after the diving wall principle in the drain pipe.

From the DE 196 55 158 C2 an open basin is previously known, in which a filter layer is arranged, wherein in the bottom region of the basin, a discharge system for the water leaked through the filter layer is provided. An overflow pipe, whose inlet is arranged above the filter layer, is also connected to this discharge system, this inlet likewise being provided with a baffle wall and / or a screening device.

Another infiltration device is from the US 6,277,274 B1 previously known. Again, it is an upwardly open basin with a first and a second chamber, which are arranged one above the other. The upper first chamber is filled with an organic filter layer, which chamber is provided on the underside with a drainage tube, into which the water seeped down through the filter layer of the first chamber is taken up by a corresponding perforation. Both chambers are interconnected by a flushing pipe, wherein the inlet of the flushing pipe is arranged above the filter layer of the first chamber and the outlet of the flushing pipe is arranged in the lower second chamber. Again, the inlet of the flushing pipe is covered by a closure. The flushing pipe is also connected to the drainage pipe.

Furthermore, from the US 2010/0206790 A1 a stormwater treatment system comprising a treatment chamber. This treatment chamber is filled with a filter medium which is under attack in the bottom region of the treatment chamber by a perforated drainage pipe. In addition to the inlet through a cover of the treatment chamber, the known arrangement has an over the cover projecting inlet pipe, which opens into a distribution box, in turn, a vertical downpipe is connected, can flow through the unfiltered water and passes to an outlet. At this drop tube and arranged in the bottom region of the treatment chamber drainage pipe is connected.

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.

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, 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 chamber formed below the support element. Out of the drainage chamber, the filtered water can drain away easily.

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 cartridge, passes through it located filter substrate and exits on the bottom in the direction of the drainage chamber from the filter insert. Here, an elaborate coarse filter is additionally used.

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.

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.

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. The invention also has the task of more effectively using the space which has been converted by the channel body and which is installed in the prior art at the expense of the storage capacity with the filter devices.

Another problem of prior art dewatering troughs provided with a filter substrate is that the filter element, which is typically formed by a filter substrate, allows a slower passage of water than a dewatering trough that does not have such a filter substrate is provided. This is because the introduced surface water, while penetrating the substrate, is purposely cleaned and thus has a longer residence time in the filter substrate than if it were discharged unfiltered by a groove member. This disadvantage is accepted, because in this way a first cleaning of the introduced surface water is effected. However, in the case of heavy rain events, which have become more common in recent years, the problem is that due to the integrated filter in the gutter body reduced swallowing capacity of the drainage channel, this gradually runs full and may be overflowed, so that the proper drainage of draining surface is no longer ensured in all cases. This is a security risk that should not be underestimated, especially in connection with the drainage of traffic areas.

The invention is therefore also based on the object to develop a solution for the previously known Filterubstratrinnenelemente, which has at least as needed, such as in the case of heavy rain events, higher absorption capacity and depending on the particular installation and drainage situation on site so adaptable to the needs, that, at least as far as humanly reasonable, local regulations for the discharge of surface water into sewers are met in all cases.

This is achieved by a Filterubstratrinnenelement according to the features of claim 1. Such a Filterubstratrinnenelement can be further developed by the features of the dependent claims 2 to 13 meaningful.

The solution of this object is achieved according to claim 1, characterized in that in the gutter body, a drain pipe is integrated, the inlet is disposed above the filter substrate and thus allows passage of the introduced surface water through the drain pipe, bypassing the filter substrate to an outlet of the drain pipe. This is because the introduced surface water accumulated above the filter substrate in the gutter body, when the water level of this backwater reaches a height above the inlet of the drain pipe, is discharged through the drain pipe while bypassing the integrated filter substrate. The drainpipe thus has the function of preventing overflow of the filter substrate inside element, because possibly over a critical water level rising surface water within the gutter body can flow unhindered through the drain pipe and thus prevents the water level within the gutter body rises above this critical height. As a result, a full running of the Filterubstratrinnenelementes is prevented in the result and thus excluded any overflow of the channel. In addition, this solution also increases the swallowing capacity of the gutter. In addition, claim 1 teaches that the relative height of the inlet of the drain pipe above the surface of the filter substrate within the gutter body, the amount of unfiltered partial flow with respect to the amount of the filtered partial flow of the introduced surface water and thus the respective degree of filtration for the introduced surface water through the Filterubstratrinnenelement is adjustable. As a result, therefore, the degree of filtration of the introduced surface water is adjusted by the appropriate arrangement of the inlet of the drain pipe. According to the teaching of the invention, the height of the inlet is also selected depending on the capacity of the filter substrate used and the Rückstaupotenzials within the gutter body and the final capacity of the drain pipe, and taking into account the expected in heavy rainfall introduced surface water amount in relation to the hydraulic power of the filter substrate inner element, which is dependent on the nominal diameter or the inlet cross section, the backwater depth and the discharge cross section of the inserted channel body. In this case, the relative height of the inlet in an area above the filter substrate ≥ the cross section of the drain pipe and ≤ the distance of the upper edge of the drain pipe from the lower edge of a gutter cover of the gutter body can be selected. Accordingly, by arranging the height of the inlet of the drainage pipe within the limits set out above, depending on the expected resulting maximum surface water amount to be discharged through the gutter, the skilled person can ensure that the local regulations on the degree of purity of the discharged surface water or, in particular, in the sewer system introduced surface water are respected. The solution according to the invention thus relates to a filter substrate inner element which can be adjusted by adapting to the local conditions so that by a corresponding partial flow treatment adaptation to local regulations according to appropriate dimensions, in particular relative arrangement of the inlet of the drain pipe within the Filterubstratrinnenelementes, in a comparatively simple manner is possible.

In this context, it should be noted that even in the case of a derivative of a portion of the surface water through the integrated drain pipe, so called a partial flow treatment, still a filter effect is achieved, because even in this situation, after all, a significant proportion of the introduced surface water flows through the filter substrate and cleaned accordingly. Securing the Filterubstratrinnenelementes by an integrated drain pipe against any overflow is therefore not paid with a temporary loss of filtering the introduced surface water, but only with a temporarily reduced filter performance.

However, the advantages of the filter substrate inner element according to the invention are not exhausted in an overflow protection of the corresponding channel, but rather allows the above-described partial flow treatment using the drain pipe according to the invention a calculation of the proportion of filtered and unfiltered derived surface water in relation to the expected introduced total surface water amount. Incidentally, in this way, the hydraulic power of the gutter system can be adjusted in dependence on these calculations. The hydraulic power or the drainage capacity of the gutter system depends on the respective nominal diameter or the inlet cross section, the backwater depth and the discharge cross section of the gutter used in each case. Significantly, the rate of flow through the filter substrate affects the drainage capacity of the gutter system. Naturally, this flow rate reduces the drainage capacity so that backflow can occur at higher discharge rates and not all filtered surface water can be filtered immediately. It can therefore only a part of the discharge flow filtered in this case and the other part are discharged directly through the drain pipe. The filtered discharge rate and the unfiltered discharge rate can be accurately determined based on the parameters of the flow rate of the filter substrate used, the backflow potential in the gutter line and the drainage capacity of the drain nozzle or the drain pipe. Due to the variability of the backwater depth and the cross section of the gutter system used, it is possible to precisely calculate and thus also plan how the division of the filtered and unfiltered portion of the introduced surface water should take place for the respective drainage gutter system. The filter substrate inner element according to the invention thus offers the additional advantage that both the hydraulic capacity as well as the respectively required filter degree of the introduced surface water can be precisely adjusted as a function of the expected amount of rainfall. The Filterubstratrinnenelement can therefore be precisely adapted to the particular requirements on site or be optimally adapted to them.

This can be adjusted by the relative height of the inlet of the drain pipe within the channel body, ie in particular by the distance of the inlet of the drain pipe above the surface of the filter substrate, how large the proportion of the filtered partial flow of the introduced surface water in relation to the unfiltered by the Filterubstratrinnenelement is passing amount of water. In this way, an advantageous possibility is available to previously determine or adjust the degree of filtration, which is achieved with the respective filter substrate inner element, in particular in heavy rain, by means of the corresponding relative arrangement of the inlet of the drain pipe.

In this case, in the case of an embodiment, both the inlet and the outlet of the drainage pipe can be arranged above the filter substrate arranged in the gutter body. This causes a relatively high-lying connection for the outgoing from the gutter body surface water, which allows a variety of different connection options, in particular the connection to common sewer or drainage pipes.

In an alternative embodiment, the outlet of the drainage pipe can also be arranged below the filter substrate integrated in the gutter body, with the result that both the filtered and the unfiltered surface water escape from the drainage space of the gutter body through the gutter floor permeable to water, at least in some areas, through a common outlet.

In yet another alternative embodiment, a two-part gutter twine can be used instead of a single gutter body. The second channel body is in this case closed by the first channel body such that the channel bottom is placed on the second channel body. 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 with 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.

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 the filter substrate in the upper channel body and connect to the continuing lines Such a solution is very easy to maintain, as by simply removing a Trough cover immediately created access to the filter substrate and the filter substrate can be replaced if necessary. Also, by the said filter grid 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 properly positioned for proper operation, are not used here, so that the installation of such a filter substrate channel of several Filterubstratrinneninnen as 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 is formed. 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, above which the resulting, filtered surface water can be dissipated. 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.

Furthermore, an outlet pipe can advantageously also be integrated in conjunction with a two-part gutter body in such a way that a drainage pipe is arranged in the inlet space in order to be able to discharge surface water which accumulates suddenly to a great extent. Such a drain pipe is in this case erected vertically in the first channel body and has an inlet in the amount of the maximum filling height of the channel body. The drain 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.

Alternatively, the vertically upright drainage pipe can be removed via a side drain of the first gutter body and in this case be fed out of the drainage space of the sewer system outside the filter substrate inner element via a merger together with the filtered water.

The invention described above will be explained in more detail below with reference to an embodiment.

Show it

1 a one-piece filter substrate inner element with filled filter substrate with a straight drain pipe in a cross-sectional view,

2 a two-part filter substrate inner element without filled filter substrate in a perspective view obliquely from above,

3 the filter substrate inner element according to 3 with a lateral outlet of the second channel body and a drain pipe installed in the inlet space of the first channel body,

4 a filter substrate inner element according to 4 for partial flow treatment with additional pooling of filtered and unfiltered surface water and

5 a two-part filter substrate inner element with an alternative solution for partial flow treatment.

1 shows in a cross-sectional view a Filterubstratrinnenelement 1 essentially comprising a one-piece gutter body 20 , in the lower region of a filter substrate 6 is arranged. It is above the bottom of the channel body 20 arranged filter substrate 6 inside the gutter body 20 an inlet room 4 formed while below the filter substrate 6 a drainage room 5 is trained. In this case, the filter substrate 6 on the underside of a filter grid 10 opposite the drainage room 5 separated. In the bottom area of the gutter body 20 is a drain neck 9 molded, from which into the drainage chamber 5 Penetrated surface water after passing through the filter substrate 6 and the filter grid 10 from the gutter body 20 can escape into an approximately connected sewage system. Upper side is the gutter body 20 from a recording 8th , so as a frame, completed, in the in the representation according to 1 a gutter cover 15 rests.

As shown in 1 is in this one-piece gutter body 20 a drainpipe 13 incorporated, this drain pipe 13 unlike the execution according to 1 has a straight course and by the lower part of the channel body 20 arranged filter substrate 6 passes through, leaving the spout 22 of the drainpipe 13 below the filter substrate 6 in the drainage room 5 empties.

In this embodiment, therefore, both the unfiltered, passes through the drain pipe 13 passing through surface water, as well as through the filter substrate 6 passed and filtered surface water into the drainage area 5 Finally, through the geodesic lower drain pipe 9 to be dissipated. As a result, filtered and unfiltered surface water, such as in the case of heavy rain, mixes in the drainage area 5 , wherein due to the filtering effect of the filter substrate 6 and the associated supply of partially purified water is still guaranteed a better water quality, as if completely unpurified water, such as heavy rain, would penetrate into the connected sewer.

2 shows a filter substrate inner element 1 consisting of a first channel body 2 and a second gutter body 3 , The first gutter body 2 is here above the second channel body 3 arranged such that in the gutter floor 7 of the first channel body 2 recessed outlet pipe 9 in the second gutter body 3 open out. About page runs 14 respectively. 12 the arrangement of drain pipes or overflow pipes usual nominal width is possible.

According to 3 is additionally in the first channel body 2 a drainpipe 13 with a page expiration 14 shown. This results in several Options for the reuse of surface water. For the purpose of partial flow treatment, both side processes are used 12 and 14 connected to the sewer.

The drainpipe 13 has a free upper edge, which is equal to the maximum filling of the first channel body 2 is arranged. If the water level rises in the first channel body 2 over the top edge of the drainpipe 13 out, so the water is in the drain pipe 13 infuse and over the side drain 14 dissipated.

One can now know the expected precipitation amounts, the discharge capacity of the filtered surface water, the backwater capacity in the inlet space 4 and the drainage capacity of the drainpipe 13 calculate the overall drainage performance of the filter substrate system. Over the free upper edge of the drainpipe 13 the total run-off power can be controlled. The deeper the drainpipe 13 in the drainage room 4 is arranged, the more is derived directly unfiltered. Conversely, with greater height of the drainpipe 13 in the exhaust air room 4 derived more surface water filtered.

In 4 you also recognize how both side processes 12 and 14 outside the filter substrate channel via a merge 16 be bundled in a single line.

In 5 another alternative of an overflow solution is shown. In the case of overflow, in this configuration, the water in the inlet space 4 directly into the drainpipe 13 enter and without detours in the drainage room 5 spent.

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-piece 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 channel body part

3

second channel body part

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

drain pipe

14

page flow

15

channel cover

16

Sink / merge

17

Connection of both gutters

20

Channel body

21

enema

22

outlet

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102011001356 A1 [0002, 0008]
• DE 20012282 U1 [0003]
• DE 19655158 C2 [0004]
• US 6277274 B1 [0005]
• US 2010/0206790 A1 [0006]
• EP 2080840 B1 [0007]
• DE 102012001574 A1 [0009]
• US 5391295 A [0010]
• DE 10136161 A1 [0011]

Claims (13)

Filter substrate inner element ( 1 ) for the discharge and purification of surface water, comprising at least one gutter body ( 20 ) with a in this channel body ( 20 ) arranged filter substrate ( 6 ) and one below the filter substrate ( 6 ) arranged drainage space ( 5 ), the underside of a, at least partially permeable, gutter bottom ( 7 ) of the gutter body ( 20 ), wherein within the channel body ( 20 ) an outlet pipe ( 13 ) is arranged such that its inlet ( 21 ) above the filter substrate ( 6 ) is arranged and a passage of the introduced surface water through the drain pipe ( 13 ) bypassing the filter substrate ( 6 ) to an outlet ( 22 ) of the drainpipe ( 13 ), characterized in that the relative height of the inlet ( 21 ) of the drainpipe ( 13 ) above the filter substrate ( 6 ) within the channel body ( 20 ) the amount of the unfiltered partial flow in relation to the amount of the filtered partial flow of the introduced surface water and thus the respective filtering degree for the introduced surface water through the filter substrate inner element ( 1 ) by the relative height of the inlet ( 21 ) of the drainpipe ( 13 ) is adjustable above the surface of the filter substrate, wherein the ratio of the unfiltered partial flow to the filtered partial flow in dependence on the flow rate of the introduced surface water through the filter substrate used and the back-up potential within the channel body ( 20 ) on the one hand and the drainage capacity of the drainage pipe ( 13 on the other hand taking into account the expected introduced surface water quantity in relation to the hydraulic power of the filter substrate inner element ( 1 ), of the nominal diameter or the inlet cross section, the backwater depth and the discharge cross section of the inserted channel body ( 20 ) is determinable and in this case that the relative minimum height of the inlet ( 21 ) of the drainpipe ( 13 ) above the filter substrate ( 6 ) within the channel body ( 20 ) ≥ the cross section of the drainage pipe ( 13 ) and ≤ the distance of the lower edge of a gutter cover ( 15 ) from the upper edge of the drainpipe ( 13 ), wherein both the filtered and the unfiltered surface water before or after passing through the channel body ( 1 ) about a merge ( 16 ) are jointly derivable. Filter substrate inner element ( 1 ) according to claim 1, characterized in that both the inlet ( 21 ) as well as the outlet ( 22 ) of the drainpipe ( 13 ) above the in the channel body ( 20 ) arranged filter substrate ( 6 ) are arranged. Filter substrate inner element ( 1 ) according to claim 1, characterized in that the drainpipe ( 13 ) vertically within the channel body ( 20 ) is anchored in such a way that the spout ( 22 ) of the drainpipe ( 13 ) below the filter substrate ( 6 ) is arranged, thus the drain pipe ( 13 ) the filter substrate ( 6 ) completely penetrates, so that in the drain pipe ( 13 ) introduced unfiltered surface water into the drainage space ( 5 ). Filter substrate inner element ( 1 ) according to claim 1, characterized in that the gutter body ( 20 ) is divided into two, comprising a first channel body part ( 2 ) with one in an inlet space ( 4 ) arranged filter substrate ( 6 ), as well as below the filter substrate ( 6 ) by an intermediate level of the inlet space ( 4 ) separate expiration space ( 5 ), where the outflow space ( 5 ) from a separate second channel body part ( 3 ) is formed, which inlet side with the intermediate level forming, at least partially permeable, gutter bottom ( 7 ) of the first channel body part ( 2 ) is closed. Filter substrate inner element ( 1 ) according to claim 4, characterized in that the channel bottom ( 7 ) of the first channel body part ( 2 ) with a receptacle of the gutter cover ( 8th ) of the second channel body part ( 3 ) connected is. Filter substrate inner element ( 1 ) according to one of claims 4 or 5, characterized in that between the channel bottom ( 7 ) of the first channel body part ( 2 ) and the second channel body part ( 3 ) A frictional connection (17) is made. Filter substrate inner element ( 1 ) according to claim 6, characterized in that in the channel bottom ( 7 ) of the first channel body part ( 2 ) one or more drain sockets ( 9 ) is / are arranged. Filter substrate inner element ( 1 ) according to one of the preceding claims 4 to 7, characterized in that the channel bottom ( 7 ) of the first channel body part ( 2 ) has at least one opening, which preferably by means of a water-permeable, but for the filter substrate ( 6 ) impermeable filter grid ( 10 ) is closed. Filter substrate inner element ( 1 ) according to one of the preceding claims 4 to 8, characterized in that the first channel body part ( 2 ) inside in the bottom area at least one flat filter element, preferably a filter mat ( 11 ) or a filter plate is assigned. Filter substrate inner element ( 1 ) according to one of the preceding claims 4 to 9, characterized in that the second channel body part ( 3 ) a page run ( 12 ) having. Filter substrate inner element ( 1 ) according to claim 4, characterized in that the drainpipe ( 13 ) into the drainage room ( 5 ) of the second channel body part ( 3 ) opens. Filter substrate inner element ( 1 ) according to claim 4, characterized in that the drainpipe ( 13 ) into a page run ( 14 ) of the first channel body ( 2 ) opens. Filter substrate inner element ( 1 ) according to claim 12, characterized in that the page sequence ( 14 ) of the first channel body part ( 2 ) together with a page sequence ( 12 ) of the second channel body part ( 3 ) with a sink ( 16 ) and possibly further pipe elements is connected.

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