Gully with filter, filter for a gully and its use

Abstract

The invention relates to a street drain. The street drain has a cylindrical base body, an upper inlet designed to allow surface water to flow into the base body from above during use, a lateral outlet designed to allow water to flow out of the base body during use, a space referred to as a sludge trap, which is arranged in the base body and below the outlet, and a filter arranged in the base body, upstream of the outlet, and through which water can flow towards the outlet in such a way that water is guided through a filter material. According to the invention, a continuous channel with a free cross-section of at least 100 mm in diameter runs within the base body from the inlet to the sludge trap.

Description

[0001] The invention relates to a street drain according to the preamble of claim 1. The street drain has a cylindrical base body, an upper inlet which is designed to allow surface water to flow into the base body from above during use, a lateral outlet which is designed to allow water to flow out of the base body during use, a space referred to as a sludge trap which is arranged in the base body and below the outlet, and a filter which is arranged in the base body (2), is connected upstream of the outlet (5) and can be flowed through towards the outlet (5) in such a way that water is passed through a filter material.

[0002] Generic street gullies are well known in practice. They are used to collect surface water, typically surface water from roadways, and feature a cylindrical body into which the water flows from above. The water can flow into the sewer system through a side outlet, with a corresponding sewer pipe connected to the street gully outlet. Unlike dry-running street gullies, where the outlet connects to the bottom of the cylindrical body, generic street gullies feature a wet sludge trap, namely a space within the body located below the outlet that serves as a settling chamber for sand and other heavy particles present in the water, preventing them from entering the sewer system.A filter is arranged within the base body, through which the water must pass before it reaches the outlet, so that, depending on the design of the filter material, at least a purely mechanical filtration is achieved and, for example, particles above a certain particle size are retained in the filter.

[0003] To clean the sludge trap, the filter is removed so that a flushing hose can then be inserted from above into the base body and into the sludge trap, for example through the inlet or after dismantling an upper cover of the street drain.

[0004] The invention is based on the object of improving a generic street gully in such a way that its maintenance is simplified. Furthermore, the invention is based on the object of providing a suitable filter for this purpose.

[0005] This object is achieved by a street drain having the features of claim 1 and by a filter according to claim 11. An advantageous use of the filter is described in claim 18. Advantageous embodiments are described in the subclaims.

[0006] According to the invention, a continuous channel with a free cross-section of at least 100 mm in diameter runs within the base body from the inlet to the sludge trap.

[0007] In other words, the invention proposes creating a continuous free channel within the base body with a free cross-section such that this channel runs from the inlet to the sludge trap and has a free diameter of at least 100 mm. The invention is based on the consideration that the flushing hoses commonly used in practice have diameters in the range of approximately 100 to approximately 125 mm. The flushing hose can therefore be guided through the aforementioned channel from above into the sludge trap, so that the particles deposited in the sludge trap can then be vacuumed out and / or the sludge trap can be flushed with flushing fluid without it being necessary to dismantle the filter to carry out such maintenance work.

[0008] In one embodiment, the channel can be created by designing the filter as a ring filter. Such a ring filter can largely fill the cross-section in the main body of the street drain, but has an opening through which the flushing hose can be guided downwards into the sludge trap, and around which the filter material runs. In one embodiment, the channel can be created by designing the filter as a flat filter, which—viewed in a horizontal plane—has an elongated cross-section rather than a circular one.

[0009] The inventive design of the street gully is particularly advantageous when the maintenance intervals for flushing the street gully and for maintaining the filter are different, meaning the filter does not have to be handled at the same time as the flushing process. Furthermore, the inventive design of the street gully is advantageous when the maintenance work for flushing the street gully and for maintaining the filter is carried out by different groups of people, because in this case, too, the filter does not need to be handled at the same time as the street gully is being flushed.

[0010] The invention further assumes that, unlike shafts, which are commercially available in various diameters, street gullies with a comparatively small and standardized inner diameter are used. Given the hydraulic performance of the street gully, namely the volume of water flowing through per unit of time, the filter must not be smaller than a certain size to ensure sufficient effectiveness. The filters known from practice have circular cross-sections and typically occupy such a large portion of the cross-section of the cylindrical base body of the street gully that no clearance profile remains around the filter within the base body, which would ensure a free cross-section of 100 mm in diameter and would enable the channel provided according to the invention, which runs from the inlet to the sludge trap.However, by appropriately adapting the filter design, such a channel can be made possible.

[0011] If the channel only needs to have a free diameter of 100 mm to allow the insertion of a flushing hose into the sludge trap, more cross-sectional area remains within the main body of the street gully for the installation of the filter, allowing the filter to have a larger volume and thus greater filtering efficiency. In this respect, it is advantageous to keep the channel cross-section as small as possible. In one embodiment, however, the street gully has a channel within the main body with a free cross-section of at least 130 mm in diameter. This allows all commonly used flushing hoses to be used, and the street gully or its filter does not have to be specifically adapted to the flushing hose dimensions used.This simplifies the production and storage of the filters and avoids the need to subsequently adapt the street drains to new, larger flushing hose dimensions if the flushing hoses are changed within a municipality, perhaps due to the purchase of a new flushing vehicle.

[0012] The base body preferably has an inner diameter of between 400 mm and 500 mm. The above-described problem of a filter largely filling the base body's cross-section arises primarily in street drains whose base body has such an inner diameter, e.g., the inner diameter of approximately 450 mm known in practice.

[0013] Preferably, the filter has an inlet opening which, in use, is at a vertical distance from the lower edge of the outlet such that the inlet opening is arranged lower than the lower edge of the outlet. The vertical distance is in particular at least 20 mm. In one embodiment of the street gully, the inlet opening of the filter arranged in the base body is located significantly lower than the lower edge of the street gully outlet. It can be assumed that between rainfall events, a liquid level at the level of the lower edge of the outlet develops inside the street gully. Light materials such as oil, light plastics such as PE or PP, and the like float at the level of this liquid level on the liquid in the street gully. Surface water flowing through the inlet into the interior of the base body can entrain such light materials, even though they have a tendency to float in the water.By arranging the inlet opening of the filter at a sufficiently low level, it can be ensured that the buoyancy of the light materials carried downwards prevents them from entering the filter, so that only the smallest possible proportion of the light materials, or even no light materials at all, can enter the filter and possibly subsequently into the sewer system.

[0014] In the aforementioned design, the filter inlet is positioned lower than the bottom edge of the outlet, although a greater distance is generally advantageous for the reasons mentioned. However, the distance is limited by the average amount of material that accumulates in the sludge trap during a maintenance interval. The filter inlet should not be positioned so low that heavy materials such as sand or similar that have settled in the sludge trap are swept along by the water flow and drawn into the filter. Otherwise, the filter material will be blocked, thereby impairing the desired filtering effect and the hydraulic performance of the road gully.

[0015] The filter is designed so that the water within the base body must first enter the filter's inlet and pass through the filter material before it can then flow into the street drain outlet and thus into the sewer system. The filter material creates a flow resistance for the water, so that during heavy rainfall events, the resulting water volume may not be able to drain quickly enough through the street drain into the sewer system.

[0016] In a preferred embodiment of the invention, the filter has a flow path for the water, referred to as an emergency overflow, which bypasses the filter material and leads to the outlet. This flow path runs over a highest point, which is higher than the upper edge of the outlet and, in particular, geodetically higher than the upper edge of the outlet.

[0017] If the volume flow of the incoming water does not exceed a certain limit, the water builds up within the main body to such an extent that it can flow completely through the outlet, i.e. at most up to the height of the upper edge of the outlet. At this time, there is also water within the emergency overflow, but it cannot flow to the outlet bypassing the filter. If the volume flow of the incoming water exceeds the aforementioned limit, however, the water in the main body of the street gully rises faster than it can be discharged through the outlet. The water therefore rises not only to the upper edge of the outlet, but also further upwards, reaching the highest point of the emergency overflow, which is higher than the upper edge of the outlet.If the water continues to rise, it flows over the highest point of the emergency overflow to the outlet, thus bypassing the filter and its flow resistance, so that the emergency overflow can maintain the original hydraulic performance of the street drain, which it would have without a filter, so that the amount of water flowing into the street drain can be reliably drained away from the surface, e.g. a roadway.

[0018] The above-mentioned arrangement of a filter inlet opening as low as possible can be provided in particular for the inlet opening of the emergency overflow, because since the water flows through the emergency overflow without passing through the filter, entrained light materials enter the sewer system without the possibility of the light materials being retained by the filter. Preferably, an inlet opening of the emergency overflow, during use, has a vertical distance from the lower edge of the outlet such that the inlet opening is arranged lower than the lower edge of the outlet, wherein the vertical distance is particularly preferably at least 20 mm.

[0019] A filter designed according to the invention is configured for arrangement in a street gully as described above and / or below. The filter comprises connecting means designed to connect the filter to the outlet of the base body. In use, the filter has an elongated cross-section in the horizontal plane. The filter enables the creation of a street gully designed according to the invention and, in particular, has an elongated cross-section in the horizontal plane when the filter is in use, i.e., in its position of use within the street gully. The elongated cross-section of the filter, which deviates from a circle or a square, has two different dimensions in two mutually perpendicular directions.This allows for a sufficiently large clearance within the base body, even with a small inner diameter of the base body of, for example, 450 mm, to create a flushing channel with a diameter of at least 100 mm within the base body. This channel extends from the inlet to the sludge trap of the road gully and allows the insertion of a flushing hose without dismantling the filter. Such a filter can therefore also be referred to as a flat filter and is considerably more economical to manufacture than the ring filter mentioned above.

[0020] The filter preferably has first connection means, which connect to the outlet on a first side of the filter. Particularly preferably, the filter has second connection means, which, on an opposite, second side of the filter, support the filter on the base body by means of a pressing element in such a way that the first connection means bear under pressure against their associated contact surfaces in the region of the outlet. In particular, the filter has the connection means for connecting it to the outlet in the base body of the street drain. This firstly enables the filtered water to be guided to the outlet and thus into the sewer system, and secondly, depending on the design of the connection means, it can also enable the filter to be fastened within the base body.

[0021] The outlet of the street drain usually has a round opening in the main body of the street drain. A pipe element can be inserted into this round opening to enable a typical pipeline connection to a sewer pipe, e.g. in the form of a plug-in connection with a socket and spigot end. In one embodiment, the connection means of the filter and the corresponding connection means at the outlet of the street drain are designed in the form of a quick-release pipeline coupling. This enables quick and uncomplicated establishment or release of the connection, so that the filter can be quickly and easily removed from the outlet of the street drain or reattached to the outlet, for example during maintenance work when the filter material needs to be changed and / or the filter needs to be cleaned. A suitable pipeline coupling is known, for example, from EP 4 283 175 A1.

[0022] The filter preferably comprises individual filter cartridges arranged side by side, wherein the individual filter cartridges may, for example, each have a circular cross-section. The arrangement side by side results in an elongated cross-section of the entire filter. Alternatively or additionally, in one embodiment, the filter comprises a single filter housing, which, for example, has an elongated cross-section in a horizontal plane and, compared to the aforementioned multiple filter cartridges, may have a larger interior space, thus providing more space for the filter material and a correspondingly greater filter performance.

[0023] The filter can be made of several different filter materials. For example, the inlet opening of the filter or its emergency overflow can be equipped with a grid to retain particularly large particles, thus enabling mechanical and comparatively coarse filtration. Within a filter housing, the filter can be made of a finer filter material to mechanically retain even smaller particles.

[0024] In a preferred embodiment of the invention, a filter material in the form of a substrate is arranged in the filter, which is both mechanically effective in filtering, enabling the retention of particles, and biologically effective in enabling the degradation, binding, or conversion of traffic-typical substances. The substrate is preferably both mechanically effective in filtering, namely through the pore size between the individual particles of the substrate, and biologically effective in enabling the degradation, binding, or conversion of traffic-typical substances, namely substances such as oils, fuels, particles in the form of rubber or brake wear, or heavy metals.

[0025] The connecting means on the side of the filter facing away from the outlet of the base body during use comprise, in particular, a pressing element configured to press the filter toward the outlet. Particularly preferably, the pressing element is designed as a substantially U-shaped pressing bracket configured to bear against the base body in its use position against the action of a spring tensioned in the use position. Preferably, the pressing element is articulated and movable between a horizontal use position and an upright transport position.

[0026] In particular, if the inlet opening of the emergency overflow is positioned lower than the lower edge of the outlet in the main body of the street gully, the emergency overflow, in a preferred embodiment, forms an odor trap. This requires that there are no higher openings through which gases from the sewer system, the outlet of the main body, and the emergency overflow of the filter can flow into the interior of the main body and escape from it through its inlet to the outside. A correspondingly tight design of the filter therefore enables an effective odor trap with simple means, even if the inlet opening of the emergency overflow is positioned lower than the lower edge of the outlet.

[0027] In one embodiment, the outlet in the base body and the one or more elements with which the filter connects to the outlet comprise standard parts according to DIN 4052. In this context, the invention assumes that the majority of street drains connect to the sewer system using standard parts; in practice, this will probably be the case for approximately 90% of street drains. Therefore, the use of standard parts as connection elements with which the filter is equipped enables problem-free connection of the filter to the outlet of the street drain without the need for additional adapter pieces or similar intermediate elements. For example, the connection of the filter to the outlet of the street drain can be realized in the form of a plug-in connection with a socket and spigot end.

[0028] The filter can be mounted within the base body by mounting corresponding connection means in the base body, for example in the outlet or near the outlet, in order to then connect the filter to these base body-side connection means using the filter-side connection means and thus to be able to hold it in its predetermined position of use within the base body.

[0029] In one embodiment, the filter has first and second connection means on two opposite sides. The first connection means serve to connect the filter to the outlet of the base body. The outlet does not necessarily have to have its own connection means on the base body. Rather, the second connection means of the filter serve to support the filter within the base body and hold it in its position of use. For this purpose, the second connection means on the opposite side of the filter extend far enough that they rest against the base body from the inside. The second connection means have a pressing element or are designed as a pressing element overall, so that they press the filter towards the outlet.This ensures that the first connecting elements are pressed against their associated contact surfaces, which are located in or near the outlet, with the pressure generated by the contact element. This ensures, firstly, a tight connection of the filter to the outlet of the street gully and, secondly, a secure hold of the filter in its operating position.

[0030] In one embodiment, the pressure element is designed as a telescopic, spring-loaded rod. In another embodiment, the pressure element is designed as a substantially U-shaped pressure bar, which connects to the filter at both ends, thus enabling particularly stable support of the filter. Between its two ends, the pressure bar rests against the base body on the inside with spring pressure. For example, with a suitable shape, the pressure bar itself can serve as a spring element, or it can have a slotted guide and a spring at each of its two ends, where it connects to the filter, so that it can be moved relative to the filter against the spring action.In another embodiment, the pressure bar has an outwardly projecting spring-loaded plunger between its two ends, where it is closest to the base body. This plunger rests against the base body and can be pressed in against the spring action, so that the plunger rests against the base body with a certain preload. This preload generates the contact pressure with which the opposing first connection means rest against their associated contact surfaces at the outlet.

[0031] In one embodiment, the pressure element is pivotably mounted. In its use position, namely when the filter is also located within the street gully, the pressure element extends in a horizontal orientation essentially transversely through the main body of the street gully. To enable easy insertion of the filter into the street gully or removal from it for maintenance work, the pivoting pressure element can be moved into an upright transport position, in which it either hangs downwards or projects upwards. For example, the aforementioned pressure bracket can be pivotally mounted on the filter housing at both ends.

[0032] The present invention is primarily directed to the application of a flat filter in a street drain. Manholes have tubular base bodies that are fundamentally comparable to the base bodies of street drains. However, in manholes, the inlet of liquid media is usually not from above as in a street drain, but rather radially or tangentially from the side. Thus, the base body of a manhole has not only an opening as an outlet, but also an opening as an inlet in its wall. Furthermore, more than two inlets can be provided in a manhole.

[0033] With correspondingly large nominal shaft diameters of, for example, 1000 mm, filters of virtually any design can be installed upstream of the main body outlet, while still leaving sufficient space within the shaft cross-section to route maintenance tools past the filter, such as a flushing hose that is to be lowered into a sludge trap at the bottom of the shaft. However, with shafts that have a small nominal diameter of a maximum of 650 mm, such as the 630 mm commonly used in practice, a similar problem can arise as with street gullies whose main bodies have the aforementioned diameters of approximately 400 to 500 mm.

[0034] The invention therefore also relates to the use of a filter according to the invention in a manhole instead of a street drain, provided the manhole has a nominal diameter of 650 mm or less. In this case, the filter comprises connecting means designed to connect the filter to an outlet of the manhole. Particularly if the outlet in the base body of the manhole comprises standard parts, the filter can be installed not only in a street drain, but optionally also in a manhole, if necessary, without further adaptation.

[0035] Embodiments of the invention are explained in more detail below using purely schematic representations. Fig. 1a vertical section through a street drain with a first embodiment of a filter, Fig. 2a horizontal section through the street drain of Fig. 1 at the level of its outlet, Fig. 3 to 5Views from different directions of a second embodiment of a filter which is designed for installation in a street drain.

[0036] In Fig. 1 1 shows a street drain 1 in vertical section, which has a cylindrical base body 2 composed of several segments. On the cylindrical part of the base body 2 there is a conical and eccentric attachment 3, which has an opening on its upper side as an inlet 4, through which surface water can flow into the base body 2. The water initially collects in the interior of the base body 2 and, when the level is sufficient, flows out of an outlet 5 of the base body 2, with a sewer pipe (not shown in the drawing) connecting to the outlet 5. Below the outlet 5, the lowest area in the interior of the base body forms a sludge trap 6, in which heavier components such as grit, sand and the like, which have entered the base body 2 with the surface water, settle.

[0037] In the street drain 1, a filter 7 is arranged, which has an elongated cross-section in a horizontal plane and has a larger dimension transverse to the shown section plane than within the section plane of the Fig. 1 , as in particular from Fig. 2 is evident.

[0038] Fig. 1 und Fig. 2 make it clear that by designing the filter 7 as a flat filter, a sufficiently large free cross-section remains inside the base body 2 in order to create a channel 8 through which a flushing hose can be guided from the inlet 4 into the sludge trap 6, so that the street drain 1 can be flushed without having to dismantle the filter 7, i.e. without having to remove it from the base body 2.

[0039] The filter 7 has a substrate chamber 9 filled with a filter material which, in the illustrated embodiment, is designed as a substrate that is both mechanically and biologically effective. Located in the substrate chamber 9 is a flat channel plate 10 which is constructed in the manner of a frame and is provided with a grid on its two opposite surfaces, which prevents the substrate from entering the interior of the channel plate 10 from the substrate chamber 9. The substrate chamber 9 is also delimited to the outside by grids 11. Surface water which has flowed into the base body 2 through the inlet 4, enters the substrate chamber 9 through the grids 11 at a corresponding fill level within the base body 2, passes through the grids 11 into the substrate chamber 9, passes through the substrate and reaches the interior of the channel plate 10, which thus creates a flow channel for filtered water.The filtered water thus enters a clean room 12 of the filter 7 and from there into the outlet 5 of the street drain 1.

[0040] The filter 7 further comprises an emergency overflow 14, which represents a flow path which, bypassing the substrate chamber 9, leads from an inlet opening 15 via a partition wall 16 and also to the clean chamber 12 of the filter 7.

[0041] Under normal rainfall conditions, the hydraulic capacity of the filter 7 is sufficient to allow the water within the main body 2 to rise only to the point where the liquid level is at most at the height of the upper edge of the outlet 5. However, with a larger volume flow entering the street drain 1, the level within the main body 2 rises above the height of the upper edge of the outlet 5. Water located in the emergency overflow 14 reaches the upper edge of the partition wall 16, above the highest point of the emergency overflow 14. Fundamentally, the flow behavior of the water is determined not by the upper boundary of the emergency overflow 14, for example, in the form of the filter housing, but by the lower boundary of the emergency overflow 14. In this respect, in the illustrated embodiment, the upper edge of the partition wall 16 forms the highest point of the emergency overflow 14.Deviating from the illustrated embodiment, the inlet opening 15 of the emergency overflow 14 can be arranged lower than shown or at least have a lower upper edge, so that a greater distance is created between the inlet opening 15 and the lower edge of the outlet 5 than in . Fig. 1 shown.

[0042] A pull rod 17 with an eyelet 18 serves to handle the filter 7 and to insert it into the base body 2 or to remove it from the base body 2. Connection means are arranged, on the one hand, on an extension of the outlet 5 projecting into the interior of the base body 2, as base-body-side connection means, and, on the other hand, on the filter 7, as filter-side connection means 19, so that the filter 7 is connected indirectly, namely by means of the aforementioned extension, to the outlet 5 by means of the base-body-side connection means and the filter-side connection means 19.In the illustrated embodiment, the base body-side connection means are designed as pins that extend horizontally outwards from the extension of the outlet 5, and the filter-side connection means 19 are designed as hooks that engage over the pins, so that the filter 7 can be attached to the extension of the outlet 5 and can be guided with the hook-shaped filter-side connection means 19 onto the pins of the extension of the outlet 5 in order to ensure the desired position of the filter 7 in the street drain 1 and a liquid-tight connection of the filter 7 to the outlet 5.

[0043] In the illustrated embodiment of the Fig. 1 und 2 An odor trap is also created for the street drain 1, so that no gases from the sewer system can reach the inlet 4 of the street drain 1. A flow connection for gases that could otherwise flow from the outlet 5 to the inlet 4 is interrupted by the water standing in the filter 7, which is located in the substrate space 9 and in the emergency overflow 14.

[0044] Fig. 3 shows an embodiment of a filter 7 which does not have any filter-side connection means 19 designed as hooks. Rather, the filter-side connection means 19 are distributed over two areas and are arranged in Fig. 3 right and left of filter 7. On the one hand, they have Fig. 3 to the right of the filter 7 has a collar 20 which, in use, rests against the wall of the base body 2 in such a way that a tongue 21 extends into the outlet 5 of the base body 2. In order to hold the filter 7 in this position of use, Fig. 3 To the left of the filter 7, a pressure bracket 22 can be seen, which also forms part of the filter-side connection means 19 and is pivotally mounted on the housing of the filter 7 via joints 23.

[0045] Fig. 3 shows the pressure bar 22 in its horizontal use position, from which it can be pivoted into an upright transport position. In the upright transport position, the pressure bar 22 does not obstruct when the filter 7 is to be introduced into a street drain via the inlet 4 or removed from it for maintenance purposes. In particular, the removal of the filter 7, namely its tongue 21, from the outlet 5 is only made possible by the pressure bar 22 being moved from its horizontal use position and the Fig. 3 The space visible to the left of the filter housing can be used as a movement space to remove the filter 7 from the outlet 5.

[0046] The end of the plunger 24 remote from the pressure bar 22, which in the use position rests against the inside of the base body 2, is designed in the illustrated embodiment with a spherical cutout-shaped surface so that the pressure bar 22 can be pivoted from its transport position into the use position, wherein the plunger 24 comes into contact with the inner surface of the base body 2. The further pivoting movement of the pressure bar 22 results in the plunger 24 being pressed deeper into the pressure bar 22 against the spring action and, at the same time, the dome-like, rounded end of the plunger 24 being able to slide over the surface of the base body 2 without tilting until the pressure bar 22 is in its use position.

[0047] As is particularly evident from Fig. 4 As can be seen, the pressure bracket 22 is U-shaped and has a spring-loaded plunger 24 opposite the collar 20 and the tongue 21, which extends through the pressure bracket 22. The dimensions of the pressure bracket 22 and the plunger 24 are matched to the inner diameter of the base body 2 in such a way that the plunger 24 is pressed against the spring action into the space surrounded by the pressure bracket 22. Accordingly, the filter 7, in its position of use, is supported on the base body 2 via the pressure bracket 22 and the plunger 24, so that the collar 20 is pressed against the wall of the base body 2 and the filter 7 is secured against slipping downwards by means of the tongue 21 and is thus fixed in its position of use.

[0048] The Fig. 3 The illustrated embodiment of the filter 7 does not require any specially mounted elements as connecting means on the base body, e.g., in the form of pins or the like, but simply connects to the existing geometry of the street gully 1. Thus, the filter 7 can be installed in an existing street gully 1, for example, retrofitted, without the street gully 1 having to be structurally modified or reworked.

[0049] Fig. 5 shows the filter 7 with a view of its Fig. 3 side shown on the right, so that the collar 20 and the tongue 21 are visible from the front. Reference symbol:

[0050] 1Street gully 2Main body 3Top 4Inlet 5Outlet 6Sludge trap 7Filter 8Channel 9Substrate chamber 10Channel plate 11Grid 12Clean room 14Emergency overflow 15Inlet opening 16Separator plate 17Pull rod 18Eyelet 19Connection element 20Collar 21Tent 22Pressure bracket 23Joint 24Plunger

Claims

1. Street drain (1), • with a cylindrical base body (2), • an upper inlet (4) which is designed to allow surface water to flow into the base body (2) from above during use, • a lateral outlet (5) which is designed to allow water to flow out of the base body (2) during use, • a space referred to as a sludge trap (6) which is arranged in the base body (2) and below the outlet (5), • and a filter (7) which is arranged in the base body (2), is connected upstream of the outlet (5) and can be flowed through towards the outlet (5) in such a way that water is guided through a filter material, characterized by that a continuous channel (8) with a free cross-section of at least 100 mm in diameter runs within the base body (2) from the inlet (4) to the sludge trap (6).

2. Street gully according to claim 1, characterized by thatthe base body (2) has an inner diameter of between 400 mm and 500 mm.

3. Street gully according to claim 1 or 2, characterized by that the filter (7) has an inlet opening (15) which, in use, has a vertical distance from the lower edge of the outlet (5) in such a way that the inlet opening (15) is arranged lower than the lower edge of the outlet (5).

4. Street gully according to claim 3, characterized by that the vertical distance is at least 20 mm.

5. Street drain according to one of the preceding claims, characterized by that the filter (7) has a flow path for water referred to as an emergency overflow (14), which leads to the outlet (5) bypassing the filter material and which runs over a highest point which is higher than the upper edge of the outlet (5).

6. Road gully according to claims 4 and 5, characterized by thatan inlet opening (15) of the emergency overflow (14) in use has a vertical distance from the lower edge of the outlet (5) in such a way that the inlet opening (15) is arranged lower than the lower edge of the outlet (5).

7. Street gully according to claim 6, characterized by that the vertical distance is at least 20 mm.

8. Street drain (1) according to one of claims 6 or 7, characterized by that the emergency overflow forms an odor trap.

9. Street drain (1) according to one of the preceding claims, characterized by that the outlet (5) in the base body (2) and the one or more elements with which the filter (7) connects to the outlet (5) comprise standard parts in accordance with DIN 4052.

10. Street drain (1) according to one of the preceding claims, characterized by thatthe filter (7) has first connection means (19) which connect to the outlet (5) on a first side of the filter (7), and second connection means (19) which, on an opposite second side of the filter (7), support the filter (7) on the base body (2) by means of a pressing element in such a way that the first connection means (19) bear under pressure against their associated contact surfaces in the region of the outlet (5).

11. Filter (7) adapted for arrangement in a street drain (1) according to any one of the preceding claims, with connection means (19) adapted to connect the filter (7) to the outlet (5) of the base body (2) and, in use, with an elongated cross-section in the horizontal plane.

12. Filter according to claim 11, characterized by that the filter (7) has individual filter cartridges arranged next to one another.

13. Filter according to claim 11, characterized by thatthe filter (7) has a single filter housing.

14. Filter according to one of claims 11 to 13, characterized by that in the filter (7) a filter material in the form of a substrate is arranged, which is both mechanically effective in filtering in such a way that it enables the retention of particles, and biologically effective in such a way that it enables the degradation, binding or conversion of substances typical of traffic.

15. Filter according to one of claims 11 to 14, characterized by that the connecting means (19) on the side of the filter (7) which, in use, faces away from the outlet (5) of the base body (2), have a pressing element which is designed to press the filter (7) in the direction of the outlet (5).

16. Filter according to claim 15, characterized by thatthe pressing element is designed as a substantially U-shaped pressing bracket (22) which is adapted to bear against the base body (2) in its position of use against the action of a spring tensioned in the position of use.

17. Filter according to claim 15 or 16, characterized by that the pressing element is articulated and can be moved between a lying use position and an upright transport position.

18. Use of a filter according to any one of claims 11 to 17 in a shaft instead of in a street drain, wherein the shaft has a nominal diameter of at most 650 mm, and the filter (7) has connection means (19) adapted to connect the filter (7) to an outlet (5) of the shaft.

Images