EP1507045A1 - Inlet in roads or floors with retaining device for light liquids - Google Patents

Abstract

The drain has a perforated lid (1) flush with the surface of the roadway. It rests on a frame (2) with a collar (22). The collar fits inside a cylindrical container (5) for collecting runoff water with internal partitions and curved siphon pipe (6,7) to take off water at the bottom. Water runs through the lid into a top chamber, via a frustoconical strainer with holes in the sides. This can hold back leaves. Water flows from the top chamber into a filter chamber with a coalescence filter. The flow from the filter chamber into the siphon pipe is controlled by a float.

Description

The invention relates to a road or floor inlet with Retention device for light liquids. As light liquids Here all liquids or flowable masses are considered, the Density is less than the density of water, such as gasoline, Diesel fuel, heating oil, engine oil and grease.

A device for retaining such light liquids so contaminated wastewater is, for example, in DE 31 24 556 A1 described. The designated there as a filter retainer should Have a flowed through by the wastewater container, a coalescing and optionally adsorbing immersed filter filling contains.

Such a cleaning device includes a coalescing filter and a gravity separator, and these two components of the Device fulfill different tasks. Of the Gravity separator must contain the bulk of the wastewater Separate light liquid by floating. The secluded Light liquid must be continuous or from time to time out of the Separators are removed. With discontinuous withdrawal the must Storage capacity of the separator be sized large enough.

The separator downstream filter is used to eliminate the in Water still contained residual pollution, i. those shares of Light liquid, which is too small droplet size and therefore too have low buoyancy to during the residence time in the separator to be separated. The separation of these residues is carried out by Interaction with the surface of the filter filling. Usually this consists of a adsorbing on the light liquid and often also absorbing material. But also filters with one only coalescing, i. the assembly of the Light liquid particles favor larger droplets Filter filling are known.

From this, a filter with coalescing acting Filter filling described in which a device is provided, the the formation and retention of one on the liquid surface itself allowing collecting light liquid layer of greater thickness, that of the wastewater to be purified is flowed through, characterized in that the inlet for the waste water to be cleaned via the filter filling and in the uppermost Area or above the light-fluid layer, and that on the outlet side, a device is provided which, when exceeding the permissible thickness of the light liquid layer blocks the process.

In the filter described there, the operations of the Gravity separation and storage of the separated Light liquid on the one hand and coalescence filtration on the other hand in the same container play.

Because in the filter but now stored a large amount of light liquid care must be taken that nothing of this layer gets into the process. This is done with an additional device, the when the permissible thickness of the light liquid is exceeded, the process locks. This additional device is in a drain chamber accommodated by the filter filling through one to the lower limit the light liquid layer reaching baffle is separated. These Device for locking the process is considered one of Schwerkraftabscheidern ago known float valve formed whose Float on the density difference between the light liquid and tared the wastewater.

In operation, so is in the upper part of the filter filling the Light liquid layer, the thickness of which by coalescence and Buoyancy ascending light liquids as long as grows up Achieving the critical thickness of light liquid under the bottom edge the baffle passes through into the drain chamber. There she arranges then the float to shut off the drain.

From DE 296 01 843 U1 is a device referred to as oil separator for the retention of light liquids known in conventional Street processes should be suspended. Essential point of view is while the tightness against the surrounding soil, at conventional masonry or concrete rings formed Road entries due to dynamic traffic load as a result of cracked joints often no longer exists. A Retention effect only occurs due to gravitational separation, if the drain previously clean with a sufficiently large amount Water has been filled. If the amount of light liquid becomes too large, the light liquid flows through the drain into the sewage system.

From DE 296 01 809 U1 a similarly acting device is known in the retention function by a gooseneck siphon in the process the collection container is formed.

From DE 296 00 131 U1 a similar device is known in which a additional calming wall is provided in the sump to to achieve a better separation of light liquids and a To reduce entrainment of impurities in the process.

From DE 296 01 810 U1 a discharge manifold for road courses is known of a valve device similar to that known from DE 31 24 556 A1 in which a float of tuned density passes through the drain Falling to a sealing seat closes when the float in a liquid of lower density than water, and the drain by floating open when the float surrounded by water is. According to the invention described in the document is the Float guided in a guide cage, on the one hand a precise To ensure positioning of the float over the sealing seat, in which a lateral movement of the float is prevented, and on the other hand is displaceable from the outside in the direction of the sealing seat, so that the float regardless of surrounding liquid on it the sealing seat can be pressed. This should be a secure closure in emergencies and when pumping out a so equipped Road sequence are enabled. To when operating the guide cage For example, with a shovel or the like To prevent slippage of the manifold unit is still one Clamp assembly for securing the parts of the discharge bend in their Relative position provided to each other.

From DE 196 23 869 A1, US 6,192,915 and WO 97/47829 is finally a Waste water inlet for streets, courtyards or the like known with a grate supported by a frame, one under the grating arranged foliage retention basin and one with a drain Collection container. Dirty water drains of this kind are among others known as "Gully". Such enemas are for example, in the street gutter and at the low points of too draining surfaces attached and serve the derivation of the Dirty water in the sewer.

It is for the protection of groundwater and surface waters known to arrange in the sewer separation systems in which Light liquids such as gasoline, benzene, oil or diesel from water be separated. Despite these separation plants often occur considerable Damage caused by, for example, in an accident of a Tanker oil or gasoline flows into a gully and from there over the Sewerage enters the groundwater or streams and rivers. It is to take into account that the sewage pipes are often not tight joined together and not close to the inlet shaft of a gully are connected. Even with a dense version, however, that is Problem that the sewerage downstream sewage treatment plants at larger quantities of such light liquids in their functionality are at risk and significant environmental damage due to failure of a Wastewater treatment can occur.

According to the teaching of DE 196 23 869 A1, US 6,192,915 and WO 97/47829 a waste water inlet provided in which described Defects of the known sewage outlets are avoided and in the It should be ensured that oil and gasoline are not drained arrives. This is the wastewater inlet with only a small cost can be produced, mounted quickly and reliable.

To create a compact multi-chamber system, is the collection container by a liftable separating bottom divided into an upper settling chamber and a lower plenum and valve chamber. The settling chamber is with the collection chamber connected via a downpipe, the inlet opening itself at a greater distance from the separating tray and its outlet opening itself located below the drain. In this way, below the foliage retention basin and above the valve chamber and a collection chamber a settling chamber are created in which the wastewater can settle sludge. Furthermore, in a small space Achieves that the path of the wastewater from the inlet to the outlet is relative is long. Finally, a passage of light liquid loaded dirty water through the existing water reservoir ensured, as well as in DE 31 24 556 A1 as advantageous is specified. Before the expiry of the collection is then still off DE 296 01 810 U1 known with a guided in a guide cage Float controlled valve arranged closing the drain, when the liquid in the sump is lighter than Water or if the valve by pushing down the guide cage of Hand is closed.

DE 34 03 718 A1 describes a light liquid with a substantially horizontally flowed calming chamber. A Deposition effect is here by the design of one Inlet manifold with a network device for reducing the Entry speed and a discharge manifold reached. A Separating device for separating combustible liquids from the Sewer is known from FR 680 827, which among other things an outlet comprising a multiple siphon.

A light liquid separator with calming walls and a drain, which is closable with a float, is from the German Patent 485 119 known.

The invention is based on the object, a waste water inlet of above-described type with regard to its operational safety and a lower maintenance requirements continue to improve.

This object is achieved with a road or floor inlet with a retaining device for light liquids containing at least one inlet, a collection chamber, at least one valve chamber containing at least one float, and at least one drain, wherein the at least one drain comprises a siphon-shaped manifold and a substantially directed upward, with a closable by a valve drain inlet, which forms a nearly horizontal sealing seat directly or indirectly via a sealing element, which is tightly closed by a designed as a closing body for the valve float, said float a specific weight between 0.72 g / cm ³ and 1.00 g / cm ³ , and wherein the manifold is provided with ventilation just below the drain inlet.

The Applicant has found that in the prior art known wastewater inlets with a retaining device for Light liquids, in particular with a closing valve, the Leakage of light liquids from the waste water inlet into one Channel prevents, as from DE 31 24 556 A1, DE 296 01 810 U1, DE 196 23 869 A1, US 6,192,915 and WO 97/47829, at temporarily very large amounts of water, as in a downpour or a Thunderstorms can occur, problems can occur that too Failure of the waste water inlet can lead by a Such wastewater inlet apparently blocked and no more water expires.

This problem is solved by the inventive design of a road or Bodeneinlaufes with a retainer for Light liquids dissolved. By leaps and bounds of Water flow, the float can be flushed to the sealing seat become. The high flow rate previously in the drain inlet Infiltrated water arrives even with the interposition of a siphon-type discharge manifold due to the inertia partially still into the channel, so that the water remaining in the downcomer does not reaches to the float. In the thus forming cavity between water level in the manifold and on the valve seat located floating body is a negative pressure, which is substantially by the water column difference on the inlet and outlet side of the Krümmers is determined, and in practice usually so high is that one Floating the float is prevented by the sealing seat. Particularly high is this negative pressure under such operating conditions when the channel is not in close proximity to the road or bottom inlet, a ventilation device, e.g. a control shaft, or the canal is complete due to the volume of sewage flooded, for example, in direct connection without siphon-like Manifold. The inventive arrangement of ventilation of the Drain inlet can be a pressure equalization with the atmosphere brought about and the float can swim up and down again Release drain inlet so that further dirty water can run off. Due to the ventilation, the closure function against entry of Light liquids in the channel are not affected.

By the invention is the risk that possibly with Light fluids contaminated dirt or rainwater through Flooding of the road boundary or the area to be drained drained uncontrollably in the surrounding soil, significantly reduced. Furthermore, it is no longer necessary that after a sudden heavy downpour staff of the street cleaning need to move out to supposedly clogged sewage inlets again functional to do. This was previously required, the flooded Drain dirty water inlet and all inserts and installations to remove the float from the valve seat what not only a tedious, but also time-consuming and thus costly Work is.

In a particularly preferred embodiment of the invention is the Ventilation is formed by a pipe whose one end is in or located below the drain inlet, in particular, when the deepest Place the line in or below the drain inlet. This is behind the channel even with ventilation Downpipe ensures rapid pressure equalization. this applies even if the pipe has also been flooded, because a pressure equalization, if necessary, by emptying the line in the Expiration occurs.

In a particularly reliable embodiment of the invention ends the end of the conduit away from the drain inlet near the inlet. So the risk of flooding the line is very low and that in the Case of major accident with light liquids remaining risk a slight leakage of light liquid in the channel over the Cable minimized.

An impairment of the function of the retaining device and the Ventilation is also used in the usual rough civil engineering conditions avoided if the line is guided in a hollow rail

In a further preferred embodiment, the floating body is in the valve chamber freely movable. This will already be higher up described problem that diminishes the float at sudden flushed water flow flushed to the sealing seat and so the Water flow of the road or bottom inlet even temporarily is reduced.

To ensure a secure closure of the valve, it is included expedient when the largest horizontal extent of the valve chamber of the edge of the drain inlet is not larger than half of the smallest horizontal diameter of the float.

In a particularly preferred embodiment of the invention, the specific gravity of the floating body is between 0.94 g / cm ³ and 0.98 g / cm ³ , more preferably around 0.97 g / cm ³ . This makes it possible to achieve a high retention performance with respect to various light liquids occurring in road traffic at high water throughput.

In order to achieve a large buoyancy force, it is expedient if the volume of the floating body is at least one liter (1 dm ³ ). For safe floating, it is particularly advantageous in soft rubber seals or contaminated with sticky substances wastewater, for example under lime trees, when the volume of the float is at least 1.5 liters (1.5 dm ³ ). As a result, an increased buoyancy force is achieved. For this purpose, the float can be composed of several parts.

An inventive road or ground inlet expediently a collecting container, which is characterized by at least one substantially vertical partition in the at least one collecting chamber and the at least one valve chamber is divided, and further one by a has removable upper shelf partitioned upper settling chamber, wherein the Dividing floor is at least formed in two parts and at least one the parts of the partition has an overflow pipe, which by an edge formed inlet above the partition and with Distance to this is located and a flow connection between the Settling chamber and the collection chamber forms, with all parts of the Trennbodens extends a locking latch, which is in receptacles in the the settling chamber surrounding side wall is supported so that a Movement of the partition floor is largely prevented, and the Locking latch can be removed without tools. This will For example, in a backwater in the channel prevents the Floating floor floats or pushed upwards and in particular the Float be flushed by the return flow from the valve chamber which allows the retention function against light liquids to a large extent would be lost. In addition, so will the need for an inspection all water inlets after heavy rains avoided. Prefers the safety catch consists essentially of polyethylene and has a cross section of about 10 mm x 15 mm.

Particularly simple and stable, an inventive road or Bottom inlet be formed when the collection chamber is still a Filter chamber, and the valve chamber with a also the Filter chamber covering lid is covered, preferably being a fugue hiss two parts of the dividing floor located above the lid, and the lid has a handle which at least the at least supports two parts of the partition.

A high functional safety even with downpour is obtained when the partition between the collection chamber and filter chamber in its lower Area a passage opening and in its upper part a Has overflow opening.

An inventive road or ground inlet can be particularly maintenance cost saving with in remote inspection and remote cleaning of a Channels are involved when the siphon-like manifold of 45 ° arc elements is formed with an inner diameter of about 120 to 150 mm and a radius of curvature of at least about 140 mm.

Conveniently, between the filter chamber and the valve chamber another coalescing filter arranged so that oil droplets from the through filter out the filter effluent, rise to the top and settle on the water level.

With this device it is achieved that the drain from the valve closed as soon as, for example, oil, Gasoline or other liquid that is lighter than Water. The float then sinks deeper into the liquid and thereby moves the closing body of the valve in the closed position.

The drain can be a U-shaped, siphon-like manifold with the Valve closable drain inlet be connected. On the approximately horizontal drain inlet is a cone or spherical Closure body, which is formed by a float.

In a particularly advantageous embodiment is a Inventive road or bottom inlet with a collecting container and a settling chamber below the inlet, the collection chamber is arranged under the settling chamber, and the siphon-shaped manifold in a drain pipe opens, wherein a bridging pipe is provided, the between the drainpipe and the interior of the road or Floor inlet extends and with a removable water and gas-tight closure is provided. Such an inventive Road or ground run-in can save a lot of maintenance costs Access to the channel for conventional television image inspection equipment and Provide cleaning equipment for remote inspection and cleaning a channel, which otherwise by partitioning the channel by a siphon-type odor trap and / or valve devices do not or at least not without major disassembly effort would be used.

It is expedient such an inventive road or ground inlet designed so that the bridging pipe in the road or Bottom inlet in the settling tank opens and the closure is in the Settling tank is located, with the water and gas-tight closure is preferably formed by a screw cap.

A particularly fast and easy access to the channel also results when using older equipment, when the one from the longitudinal axes of Collecting container and bridging pipe no longer included angles is 63 °, especially if at the same time of the longitudinal axes of Drain pipe and bridging pipe included angle no more than 33 °.

Economically interesting and requires little civil engineering work the use of a road or floor intake according to any one of the claims as an odor trap for an inlet into a sewage system. So will the additional space required for a conventional siphon manifold saved as an odor trap, including the need for a relatively high-lying duct connection.

Conveniently, the collecting container by at least one partition divided into two or more chambers. The valve is inside one Valve chamber housed by a substantially vertical Partition is separated from the sump. In this partition there is an opening which the valve chamber with the Collecting container connects. In this way it is achieved that the Valve is located in a calm zone.

To create a compact multi-chamber system, is the collection container by a liftable separating bottom divided into an upper settling chamber and a lower plenum and valve chamber. The settling chamber is with the collection chamber connected via an overflow, the inlet opening is located at a distance from the separating tray and its outlet opening is located below the partition. This way will be below a foliage retention basin and above the valve and filter chamber and a collecting chamber created a settling chamber in which the can settle in the sewage sludge. It is also achieved that the wastewater is distributed as finely as possible and thus the individual contiguous drops of water on impact with the Liquid levels have the lowest possible kinetic energy, to a continuous mixing of the water and the light liquid too avoid and thus improve the separation of light liquid.

In a further embodiment of the invention, it is proposed that the Collecting container sliding with a frame supporting a grid is connected and the frame is supported on a concrete ring, so that the forces acting on the grid and the frame are not on the Collecting container to be transferred. The collecting container can be advantageous Made of recycled polyethylene.

Fig. 1

eine Seitenansicht des erfindungsgemäßen Straßen- oder Bodeneinlaufes;

Fig. 2

eine Querschnittsansicht entlang der Schnittlinie I-I in Fig. 1;

Fig. 3

einen Längsschnitt entlang der Schnittlinie II-II in Fig. 2, mit Wasserfüllung und geöffnetem Ventil;

Fig. 4

eine Ansicht entlang der Schnittlinie III-III in Fig. 2, wobei zur besseren Übersicht die Trennwand mit dem Koaleszenzfilter in die Schnittebene geklappt ist; und

Fig. 5

eine weitere Ausführungsform der Erfindung in einem Längsschnitt wie in Fig. 3.

The invention will be explained in more detail with reference to exemplary embodiments illustrated in the drawings. Show it:

Fig. 1

a side view of the road or ground inlet according to the invention;

Fig. 2

a cross-sectional view along the section line II in Fig. 1;

Fig. 3

a longitudinal section along the section line II-II in Figure 2, with water filling and open valve.

Fig. 4

a view along the section line III-III in Figure 2, wherein for better clarity, the partition is folded with the coalescence in the sectional plane. and

Fig. 5

a further embodiment of the invention in a longitudinal section as in Fig. 3rd

The road or bottom inlet according to FIG. 1 is for example Streets, courtyards, squares and similar traffic areas, as well as gullies or Trenches along major highways. The inner division is off Fig. 2 can be seen. As is apparent from Figs. 3 and 4, the Road or floor inlet according to the invention an inlet 1 and frame 2 on, which is supported by a concrete ring (not shown here, on from EP 0 904 471 B1, Fig. 3, there 29, known). The frame 2 Enclosed inlet 1 is covered by a grid 3. In frame 2 are holders (not shown for clarity) attached to the upper edge of a foliage retention basin 4 settles. The frame 2 has a downwardly extending collar 22, which overlaps from the upper edge region of a collecting container 5 becomes. The outer cross section of the collar 22 corresponds to the Inner cross section of the collecting container 5. The collecting container 5 is about Seals against the collar 22 sealed. That way you can Forces acting on the grid 3 and the frame 2, not on the collecting container 5 are transmitted, since this vertically displaceable connected to the collar 22 of the frame 2 supported on the concrete ring is.

A drain 6 of the collecting container 5 is connected to the collecting container 5 via a manifold 7 acting as a siphon. The manifold 7 has an approximately horizontal drain inlet 8 with an elastic sealing ring 9 as a sealing element, which forms a sealing seat and can be closed by the floating body 10 acting as a closing body of a valve. The float 10 can thus close or open the drain inlet 8. This floating and closing body 10 is slightly lighter than the water displaced by it, so that, as shown in FIG. 3, it floats in the water and thus opens the drain inlet 8 when the water level 23 is correspondingly high. If the floating body 10 is surrounded by a liquid which has a lower density than the floating body 10, for example 0.72 g / cm ³ , then this floating body 10 sinks into the liquid and thus closes the drainage inlet 8.

The from the drain inlet 8 with the sealing seat forming the sealing ring 9 and the floating and closing body 10 formed valve is located within a valve chamber 18, in which the floating and closing body 10 is in particular vertically freely movable to order at corresponding Water level the drain inlet 8 to release. This will already do that described above problem that the float 10th flushed to the sealing seat with suddenly rising water flow and so the water flow of the road or bottom inlet only is temporarily reduced. To ensure a secure closure of the valve 8, 9, 10, it is expedient if the largest horizontal extension of the valve chamber 18 is not further away from the edge of the drain inlet 8 is located as half of the smallest horizontal diameter of the floating body 10 corresponds.

The collecting container 5 is by a liftable and at least two-part separation tray 11 divided into an upper settling chamber 12 and a lower portion with collecting chamber 13, valve chamber 18 and a Filter chamber 21. The settling chamber 12 is via an overflow pipe 14th connected to the collection chamber 13. The arrangement of the overflow pipe 14 is apparent from Fig. 3 and Fig. 2, wherein the nozzle 14 in Fig. 2 in the drawing plane is shown extended. The inlet opening 15 the overflow nozzle 14 is located at a distance from the separating bottom 11th near the bottom of the foliage retention basin 4. The outlet opening 16 of the Overflow nozzle 14 is in height or slightly below the Separation bottom 11, but well above the drain 6 and thus the Water level 23. In this way, a sedimentation tank 12 is created, in which the sludge located in the wastewater can settle. Further it is achieved that the waste water is distributed as finely as possible and thus the individual contiguous sewage drops on impact on the Liquid level 23 in the collection chamber 13 as small as possible possess kinetic energy to a continuous mixing of the water and to avoid the light liquid and so the deposition of To improve light liquid.

The collecting container 5 is characterized by at least one substantially vertical Partition 17 in the at least one collection chamber 13 and at least a valve chamber 18 divided. Appropriately, by or one further partition 17 still a filter chamber 21 is formed, wherein in the Partition 17 between the collection chamber 13 and filter chamber 21 a close to the Bottom of the collection chamber 13 arranged passage opening 29 is provided is, so that the parts of the in the collection chamber 13 are located Get liquid with the largest density in the filter chamber 21 can. This is already a high degree of separation of Light liquid reached. Between the filter chamber 21 and the valve chamber 18th the liquid must pass through a coalescing filter 20, whereby a achieved further deposition of dispersed droplets of light liquid so that as little as possible of the restrained Light liquid enters the valve chamber 18. The coalescing filter 20 filters small and smallest oil or oil from the effluent Gasoline droplets out and merges these into larger droplets that then climb up to the floating there on the sewage Oil layer. Are larger amounts of oil behind the coalescing filter 20, then they push the water under the oil layer through the Drain inlet 8, until the floating and closing body 10 only in the Oil or fuel is and thereby drops and the drain inlet. 8 closes. As a result, the valve 8, 9, 10 only in extreme cases to become active. In case of downpour, the passage cross section of Passage opening 29 to be too low to a sufficiently fast Ensure drainage of rainwater. Therefore, at the top is the Partition 17 an overflow opening 19 provided over the then wastewater can flood into the filter chamber 21 when the collecting chamber 13 floods. The passage cross-section of the coalescing filter 20 is thus sufficient chosen large that the inflowing into the filter chamber 21 wastewater can be continued in the valve chamber 18.

The valve chamber 18 and the filter chamber 21 are preferably with a covered additional cover 24, which is based on the partition 17 and a simultaneously formed as a handle 25 reinforcement the Dividing floor 11 in the region of its joints between the partition parts supported.

In extreme drought, there is also the problem that the Manifold 7 can dry out and thus an odor trap against the Channel is no longer guaranteed. At extremely low Liquid level in the valve chamber 18, the float 10 sinks the sealing seat of the drain inlet 8 and thus closes the Drain inlet 8 on its own weight. This will not just be one Drying of the formed by the siphon shape of the manifold 7 Odor trap slows down, but the closure of the Drain inlet 8 itself largely prevents the escape of Faulgasen in the sump 5 and the inlet 1 in the Surroundings. Therefore, the road or ground inlet according to the invention Also advantageous without the manifold 7 directly to the channel be connected, which is especially in narrow streets of the old town or can be beneficial at very low-lying channel.

Over all parts of the partition floor 11 extends in Fig. 3rd indicated securing latch 26, which in receptacles 27 in the Absetzkammer 12 surrounding side wall so supported that a movement the partition 11 is largely prevented upwards, and the Locking latch 26 can be removed without tools. Preferably, the Safety catch 26 essentially made of polyethylene and has a Cross-section of about 10 mm x 15 mm, so he still with one hand can be bent so far that he pulled out of the shots 27 can be. As a result, for example, in a backwater in the channel prevents the partition bottom 11 from floating or pushing up and in particular the float 10 by the return flow from the Valve chamber 18 can be rinsed, causing the retention function against Light liquids would be largely lost.

As shown in FIG. 3, the liquid level 23 rises in the Sump 13 and in the valve chamber 18 and the filter chamber 21 the Float 10 and opens the drain inlet 8 when the liquid has a greater density than the float 10, e.g. if the Liquid is water. Is there a liquid instead of water? lower density than that of the floating body 10 in the valve chamber 18, then the float 10 drops to the with the elastic seal. 9 provided edge of the drain inlet 8 and closes the Drain inlet 8. The retention capacity of light liquid is through the volume of the collection container 5 limited and the retained Light liquid must be sucked out of the collecting container 5 as needed and disposed of.

According to the invention immediately below the drain inlet 8 is a ventilation provided, which is preferably formed by a line 28, whose one end in or on the manifold 7 or below the Drain inlet 8 is located and possible at the same time the lowest point of the Line 28 is. The other end of the line 28 can via the drain 6 in lead to the channel, if such a sufficient ventilation ensured is.

Preferably, the end of the line facing away from the drain inlet 8 ends 28 near the inlet 1, e.g. at the level of the foliage retention basin 4. So is the risk of flooding the line 28 is very low and that in the case of a major accident with light liquids remaining risk of Low leakage of light liquid in the channel over the Line 28 minimized. A quick pressure equalization is also ensured if the line 28 should have been flooded because a pressure equalization then by emptying the line 28 in the Drain 8 takes place.

To damage the line 28, which expedient essentially made Polyethylene and e.g. have an inner diameter of 8 mm can, to avoid the suction of the collecting container 5, the line 28 preferably attached to the outside of the collecting container 5. Around an impairment of the function of the ventilation 28 also in the Civil engineering to avoid usual harsh conditions, the line is 28 in a hollow rail 30 which leads to the collecting container. 5 is welded and expediently also essentially made of recycled polyethylene consists.

This can avoid the problem that arises because of by sudden increase in the water flow of the floating body 10th can be flushed to the sealing seat 9. The high Flow rate previously entered into the drain inlet 8 water due to the inertia partially still in the channel, so that the water remaining in the discharge manifold 7 does not reach the Float 10 comes up. In the thus forming cavity between Water level in the manifold 7 and located on the valve seat 9 Float 10 is a negative pressure, which essentially by the Water column difference on the inlet and outlet side of the manifold 7 is determined, and in practice usually so high that one Floating of the floating body 10 is prevented by the sealing seat 9, if a high retention safety against Leichflüssigkeiten be given should. Particularly high is this negative pressure in such Operating conditions when in the channel not in the immediate Close to the road or ground inlet a ventilation device, e.g. a manhole, or the channel is due to the Wastewater is completely flooded. By the invention Arrangement of a ventilation 28 of the drain inlet 8 may be Pressure equalization can be brought about with the atmosphere and the Float 10 can float up again and the drain inlet. 8 release, so that further dirty water can drain. By the Ventilation 28 will lock the function against entry Light liquids in the channel are not affected.

By the invention is the risk that possibly with Light fluids contaminated dirt or rainwater through Flooding of the road boundary or the area to be drained drained uncontrollably in the surrounding soil, significantly reduced. Furthermore, it is no longer necessary that after a sudden heavy downpour staff of the street cleaning need to move out to supposedly clogged sewage inlets again functional to do. This was previously required, the flooded Drain dirty water inlet and all inserts and installations to remove the float 10 from the valve seat 9 to what is not only a tedious, but also time-consuming and so on is costly work.

The operation of the device according to the invention is as follows. Wastewater flows through the grate 3 into the foliage retention basin 4. There, leaves and larger impurities are retained. About the breakthroughs in Laubeimer or in the foliage retention basin 4, the wastewater enters the settling chamber 12, in which the sludge settles. The liberated from the sludge wastewater then passes through the discharge edge 15 of the overflow nozzle 14 into the collection chamber 13. Here is a calming of the effluent medium instead. The remainder of suspended particles continues to drop, so that only water and finely divided therein, for example, oils or fuels pass through the passage opening 29 in the dividing wall 17 into the filter chamber 21. The liquids, which have a lower specific gravity than water, and have not been retained in the collection chamber 13, nor in the filter chamber 21, accumulate in the valve chamber 18 above the water level. This example, oil can not enter the drain inlet 8, because the float of the valve 10 immediately touches this drain inlet 8 when it is surrounded by a liquid having a lower density than the float, the density preferably between 0.94 g / cm ³ and 0.98 g / cm ³ , more preferably about 0.97 g / cm ³ . Via the line 28, the manifold 7 is connected directly below the drain inlet 8 with the atmosphere and vented to equalize pressure, if due to large fluctuations in the flow rate of the wastewater or a complete flooding of the channel cross-section otherwise the risk of a fixed suction of the float 10 on the sealing seat existed. This ensures that the floating body 10 floats when the surrounding liquid has a greater density, for example, water.

In newly installed road or Bodeneinläufen the problem may occur that a new sealing ring 9 is used made of a material that initially has a large static friction against the float 10. To avoid malfunction in such a newly installed road or bottom inlet, it is advantageous if the float 10 generates a relatively large buoyancy force. For this purpose, it is expedient if the volume of the floating body is at least one liter (1 dm ³ ). For example, a spherical floating body 10 with a diameter of approximately 135 mm has proven itself.

For safe floating, it is particularly advantageous for very soft rubber seals or locations where waste water mixed with sticky substances is to be expected, for example under linden trees, if the volume of the float is at least 1.5 liters (1.5 dm ³ ). As a result, an increased buoyancy force is achieved. For this purpose, the float 10 may also be composed of several parts, for example a first spherical body with a diameter of approximately 135 mm and a second spherical body attached thereto with a diameter of approximately 100 mm. Such a combination results in a volume of the floating body 10 of over 1.8 liters and thus flooding by water a correspondingly large buoyancy.

To clean the dirty water inlet of the grate 3 is lifted and sucked the leaves retention basin 4 and then out of the Inlet shaft dug. Now the sedimentation tank 12 can be sucked out and then the fuse latch 26 are removed. Thereby are the at least two parts of the partition 11 accessible and can after can be taken above. Due to the multi-part of the partition 11 leaves this easier through the relatively narrow inlet opening 1 than previously in the usual one-piece shelves was possible.

Thus, the collection chamber 13 can be sucked out and cleaned. The Valve chamber 18 and the filter chamber 21 can after removal of the lid 24 are sucked out and cleaned. Furthermore, so is the wall-shaped Coalescence filter 20 accessible and can be pulled upwards and cleaned or replaced with a water jet. That too Valve 8, 9, 10 is accessible from above and its parts can getting cleaned.

Due to the additional cover 24, the parts of the valve 8, 9, 10 and the coalescing filter 20 against accidental damage during Extracting the collection container 13 largely protected.

An inventive road or ground inlet can be particularly maintenance cost saving with in remote inspection and remote cleaning of a Channels are involved when the siphon-like manifold 7 from 45 ° arc elements is formed with an inner diameter of about 120 to 150 mm and a radius of curvature of at least about 140 mm. So can usual channel TV devices and so-called cleaning pigs up in the Manifold 7 are driven, thus allowing an inspection and optionally a purge of the manifold 7, without the road or Bodeneinlauf be approached and must be taken apart.

The inventive training shown in Figure 5 a road or Bodeneinlaufs also has a bridging tube 32, which is between a drain pipe 31, into which the siphon-shaped manifold 7 opens, and the interior of the road or ground inlet. expedient the bridging pipe 32 discharges into the sedimentation tank 12.

The bridging tube 32 makes it possible, with inspection devices, so-called sewer TV or cleaning pig without dismantling the road or bottom inlet to enter the channel to inspect it and if necessary to clean. As a result, such inspection or cleaning is very easy to do so quickly and therefore cost-effectively. By this possibility of a quick and inexpensive inspection and Maintenance gives the advantage that the value retention of the channel system is much better in the long run than when doing an inspection or Cleaning is only done when malfunctions have occurred are.

To ensure the function as an odor trap and to avoid that at very high water level in the road or bottom run possibly. Light liquids can get directly into the channel, that is Bridging tube 32 with a water and gas-tight closure 33rd provided, suitably in the form of a screw cap with seal. Thereby Both an effective seal is guaranteed and a quick one Distance if necessary.

To an access path provided with the smallest possible radii of curvature to get it for a canal TV or a cleaning pig expedient if the angle between the longitudinal axis of sump 5 and Bridging tube 32 is about 60 ° and the angle between the Longitudinal axes of drain pipe 31 and bridging pipe 32 about 30 °.

LIST OF REFERENCE NUMBERS

1

enema

2

frame

3

grating

4

Foliage retention basins

5

Clippings

6

procedure

7

elbow

8th

drain inlet

9

seal

10

float

11

separating base

12

settling

13

plenum

14

Overflow pipe

15

inlet port

16

outlet

17

partition wall

18

valve chamber

19

Overflow opening

20

coalescencefilter

21

filter chamber

22

collar

23

water level

24

cover

25

handle

26

safety catch

27

admission

28

management

29

Through opening

30

rail

31

drain pipe

32

pass pipe

33

shutter

Claims (18)

Road or ground inlet with a light liquid retention device comprising at least one inlet (1), a collection chamber (13), at least one valve chamber (18) containing at least one float (10), and at least one drain (6), the at least one drain (6) comprises a siphon - shaped manifold (7) and a substantially upwardly directed, closable by a valve drain inlet (8) which forms a nearly horizontal sealing seat directly or via a sealing element (9), of the closing body for the Valve formed float (10) is tightly closed, characterized in that the float (10) has a specific gravity between 0.72 g / cm ³ and 1.00 g / cm ³ and the manifold (7) below the drain inlet ( 8) is provided with a ventilation (28). Road or floor inlet according to claim 1, characterized in that the ventilation by a line (28) is formed, one end of which is below the drain inlet (8). Street or floor inlet according to claim 2, characterized in that the lowest point of the line (28) below the drain inlet (8). Street or floor inlet according to claim 2 or 3, characterized in that the end of the line (28) facing away from the drain inlet (8) ends near the inlet (1). Road or floor inlet according to claim 2, 3 or 4, characterized in that the conduit (28) in a hollow rail (30) is guided. Street or floor inlet according to one of the preceding claims, characterized in that the floating body (10) in the valve chamber (18) is freely movable. Road or floor inlet according to claim 6, characterized in that the largest horizontal extent of the valve chamber (18) from the edge of the drain inlet (8) is not greater than half of the smallest horizontal diameter of the floating body (10). Road or floor inlet according to one of the preceding claims, characterized in that the specific weight of the floating body (10) between 0.94 g / cm ³ and 0.98 g / cm ³ , preferably by 0.97 g / cm ³ . Road or floor inlet according to one of the preceding claims, characterized in that the volume of the floating body (10) is at least one liter (1 dm ³ ), preferably at least 1.5 liters (1.5 dm ³ ), and the floating body (10) can be composed of several parts. Road or Bodeneinlauf one of the preceding claims, with a collecting container (5) by at least one in essential vertical partition (17) in the at least one Collection chamber (13) and the at least one valve chamber (18) is divided, and further one by a liftable Separating bottom (11) divided upper Absetzkammer (12), wherein the separating base (11) is formed at least in two parts and at least one of the parts of the partition (11) a Overflow nozzle (14) whose formed by an edge Inlet (15) above the partition (11) and at a distance to This is located and a flow connection between the Settling chamber (12) and the collection chamber (13) forms, wherein over all parts of the separating tray (11) a safety catch (26) extending in receptacles (27) in which the settling chamber (12) surrounding side wall so as to support a movement of the Partition (11) is largely prevented to the top, and the Locking latch (26) can be removed without tools. Street or floor inlet according to claim 10, characterized in that the collecting container (5) still has a filter chamber (21), and the valve chamber (18) with a filter chamber (21) overlapping lid (24) is covered, preferably a joint hisses two parts of the separating tray (11) above the lid (24), and the lid (24) has a handle (25) which at the same time supports the at least two parts of the separating tray (11). Road or floor inlet according to claim 10 or 11, characterized in that the partition wall (17) between the collecting chamber (13) and filter chamber (21) in its lower region has a passage opening (29) and in its upper region an overflow opening (19). Road or floor inlet according to one of the preceding claims, characterized in that the siphon-like manifold (7) is formed from 45 ° arcuate elements with an inner diameter of about 120 to 150 mm and a radius of curvature of at least about 140 mm. Road or Bodeneinlauf one of the preceding claims, with a collecting container (5) and a settling chamber (12) below the Inlet (1), wherein the collection chamber (13) under the settling chamber (12) is arranged, and the siphon-shaped manifold (7) in a Drain pipe (31) opens, with a bridging tube (32) is provided, which is between the drain pipe (31) and the interior the road or bottom inlet extends and with a removable water and gas-tight closure (33) is provided. Road or floor inlet according to claim 14, characterized in that the bridging pipe (32) in the road or bottom inlet in the settling chamber (12) opens and the closure (33) is in the settling chamber (12). Road or floor inlet according to claim 14 or 15, characterized in that the water- and gas-tight closure (33) is formed by a screw cap. Road or ground intake according to one of claims 14 to 16, characterized in that the angle enclosed by the longitudinal axes of collecting container (5) and bridging pipe (32) is not more than 63 ° and / or that of the longitudinal axes of discharge pipe (31). and bridging tube (32) included angle is not more than 33 °. Use of a road or ground drain according to one of preceding claims as an odor trap for an enema in a sewer.

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