EP2157252A2 - Improved street or floor drain with retention device for light fluids - Google Patents

Abstract

The drain has an inlet (1), a collection chamber (13), a filter chamber (21), a valve chamber (18), and an end (6). The inlet (1) has an initial connection to the fluid collection chamber (13). The collection chamber (13) has a second fluid connection to the filter chamber (21). The filter chamber (21) has a third fluid connection to the valve chamber (18). The second fluid connection (34) is connected to a third fluid connection microfilter (20).

Description

The invention relates to a road or floor inlet with retention device for light liquids. As light liquids here all liquids or flowable materials are considered, whose density is less than the density of water, such as gasoline, diesel fuel, fuel oil, engine oil and grease.

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

Such a cleaning device includes a coalescing filter and a gravity separator, these two components of the device each having different functions. The gravitational separator must deposit the majority of the light liquid present in the wastewater by floating. The separated light liquid must be removed continuously or from time to time from the separator. With discontinuous extraction, the storage capacity of the separator must be sufficiently large.

The downstream of the separator filter is used to eliminate the residual contamination still contained in the water, ie those portions of the light liquid, which have too small droplet size and thus low buoyancy to be deposited during the residence in the separator. The separation of these residual components takes place by interaction with the surface of the filter filling. As a rule, this consists of a material adsorbing on the light liquid and often also absorbing. But also filters with only coalescing acting, ie the aggregation of Leichtflüssigkeitsteilchen favoring larger droplets filter filling are known.

On this basis, a filter is described with coalescing acting filter filling, in which a device is provided which allows the formation and maintenance of a liquid surface collecting light liquid layer of greater thickness, which is traversed by the wastewater to be cleaned, characterized in that the inlet for the cleaning effluent over the filter filling and in the uppermost area or above the light liquid layer, and that on the downstream side a device is provided which blocks the process when the permissible thickness of the light liquid layer is exceeded.

In the filter described there, the processes of gravity separation and storage of the deposited light liquid on the one hand and the coalescence filter on the other hand should play in the same container.

Since the filter now but a large amount of light liquid is stored, care must be taken to ensure that this layer does not come into the drain. This is done with an additional device that blocks the process when the permissible thickness of the light liquid is exceeded. This additional device is housed in a drain chamber, which is separated from the filter filling by a reaching to the lower limit of the light liquid layer baffle. This device for blocking the process is designed as a known from gravity separators ago float valve whose float is tared to the density difference between the light liquid and the wastewater.

In operation, therefore, the light liquid layer is at the top of the filter filling, the thickness of which increases by the ascending through coalescence and buoyancy light liquids until it reaches light thickness under the lower edge of the baffle into the drain chamber on reaching the critical thickness. There it causes the swimmer to shut off the process.

Out DE 296 01 843 U1 is known as an oil separator means for retaining light liquids known to be suspended in conventional street processes. Essential aspect is the tightness against the surrounding soil, which is often no longer present in conventional masonry or formed from concrete rings road entrances due to dynamic load from the road as a result of cracked joints. However, a retention effect only occurs due to gravitational separation when the drain has previously been filled with a sufficiently large amount of clean water. If the amount of light liquid is too large, the light liquid runs through the drain into the sewage system.

Out DE 296 01 809 U1 a similar acting device is known in which the retention function is formed by a gooseneck siphon in the drain from the sump.

Out DE 296 00 131 U1 a similar device is known, in which an additional calming wall is provided in the collecting container in order to achieve a better separation of the light liquids and to reduce the entrainment of impurities in the drain.

Out DE 296 01 810 U1 For example, there is known a road drainage manifold which has a valve means similar to that of US Pat DE 31 24 556 A1 known in which a floating density body closes the drain by sinking onto a sealing seat, when the float is in a liquid of lower density than water, and opens the process by floating when the float is surrounded by water. According to the invention described in the document, the floating body is guided in a guide cage which, on the one hand, is intended to ensure accurate positioning of the floating body over the sealing seat, in which lateral movement of the floating body is prevented and, on the other hand, is displaceable from the outside in the direction of the sealing seat, so that the float can be pressed independently of surrounding liquid on the sealing seat. This is a safe closure in emergencies and when pumping a so equipped road sequence are made possible. In order to prevent slippage of the manifold unit upon actuation of the guide cage, for example, with a blade or the like, a clip assembly for securing the parts of the discharge manifold in their relative position to each other is further provided.

Out DE 196 23 869 A1 . US 6,192,915 and WO 97/47829 Finally, a waste water inlet for streets, courtyards or the like is known with a frame supported by a grate, a arranged under the lattice leaf retention basin and a drain provided with collecting container. Sewer water inlets of this type are known, inter alia, under the name "gully". Such enemas are, for example, in the street gutter and at the low points of surfaces to be drained and serve to drain the dirty water into the sewer.

For the protection of groundwater and surface waters, it is known to arrange in the sewer separation systems in which light liquids such as gasoline, benzene, oil or diesel are separated from the water. Despite these separation systems, considerable damage is often caused by, for example, oil or gasoline flowing into a gully in an accident of a tanker truck, from where it enters the groundwater or streams and rivers via the sewage system. It should be noted that the sewage pipes are often not tightly joined together and not connected to the inlet shaft of a gully. Even with a dense version, however, there is the problem that the sewerage downstream sewage treatment plants are at risk of large amounts of such light liquids in their operability and can result in significant environmental damage due to failure of a wastewater treatment.

According to the teaching of DE 196 23 869 A1 . US 6,192,915 and WO 97/47829 a waste water inlet is provided in which the described deficiencies of the known waste water inlets are avoided and to ensure that oil and gasoline does not get into the sewer. It should be the Sewage water inlet can be produced at low cost, can be installed quickly and be reliable.

In order to provide a compact multi-chamber system, the sump is divided by a liftable partition bottom into an upper settling chamber and a lower collecting chamber and valve chamber. The settling chamber is connected to the collecting chamber via a downpipe whose inlet opening is located at a greater distance from the separating bottom and whose outlet opening is below the outlet. In this way, a settling chamber is to be created below the leaves retention basin and above the valve chamber and a collection chamber in which the sludge located in the wastewater can settle. Furthermore, it is achieved in a small space that the path of the wastewater from the inlet to the outlet is relatively long. Finally, a passage of the polluted with light liquid wastewater through the existing water reservoir is ensured, as it is in the DE 31 24 556 A1 is indicated as advantageous. 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 which closes the drain when the liquid in the reservoir is lighter than water or when the valve is closed by depressing the guide cage by hand.

The DE 34 03 718 A1 describes a light liquid separator with a substantially horizontal flow through the settling chamber. A deposition effect is achieved here by the design of an inlet manifold with a network device for reducing the inlet velocity and a downcomer. A separating device for the separation of flammable liquids from the sewer is out FR 680 827 known, among other things, includes a spout with a multiple siphon.

A light liquid separator with calming walls and a drain which can be closed with a floating body is known from the German patent specification 485 119 known.

From the EP 1 507 045 A1 is a road or floor inlet with a retaining means for light liquids known, comprising at least one inlet, a collection chamber, at least one valve chamber, and at least one outlet, said at least one outlet having a substantially upwardly directed valve-closable drain inlet directly or via a sealing element forms an approximately horizontal sealing seat which is tightly closed by a designed as a closing body for the valve float, wherein the float has a specific gravity between 0.72 g / cm ³ and 1 g / cm ³ and the manifold below the drain inlet is provided with a ventilation.

The invention has for its object to further improve a waste water inlet of the type described above with regard to its reliability and lower maintenance requirements, in particular with regard to a simplification of the maintenance work to be performed.

According to the invention the object is achieved by a road or bottom inlet with a retention device for Leichflüssigkeiten comprising at least one inlet, at least one collecting chamber, at least one filter chamber, at least one valve chamber and at least one outlet; wherein the at least one drain has a substantially in installation position of the road or bottom inlet upwardly, closed by a valve drain inlet which forms a sealing element in an installed position of the road or bottom inlet almost horizontal sealing seat directly or via a sealing element; wherein the sealing seat is tightly closed by a designed as a closing body for the valve float; characterized in that the inlet has a first fluid connection to the collection chamber, that the collection chamber has a second fluid connection to the filter chamber, that the filter chamber has a third fluid connection to the valve chamber, wherein the second fluid connection comprises a coarse filter and wherein the third fluid connection includes a fine filter.

The arrangement according to the invention of coarse filter and fine filter has the advantage that coarser and in particular flat particles are kept away from the fine filter and thus the fine filter is not clogged so quickly, whereby the cleaning or replacement interval can be increased. Since the coarse filter is located in the second fluid connection between the collection chamber and the filter chamber and there is easy access from the outside to the collection chamber, the coarse filter can be easily cleaned from the outside than the fine filter. Furthermore, the arrangement has the advantage that the fine filter is not damaged by larger objects in the wastewater, as they are filtered out by the coarse filter.

In a preferred embodiment, the flow-through cross-section of the coarse filter in the second fluid connection is greater than the flow-through cross section of the third fluid connection. This prevents a suction effect from the collecting chamber in the filter chamber. This means that the coarse filter has a greater permeability than the fine filter.

Accordingly, the flow-through cross-section of the third fluid connection is greater than the flow-through cross section of the sequence. Thus, a suction effect of the filter chamber is prevented in the valve chamber.

In an advantageous embodiment of the invention, the passage openings of the coarse filter are designed so that the passage of a spherical test specimen with a diameter of 15 mm is prevented. Preferably, the passage openings of the coarse filter are formed so that the passage of a spherical test body is prevented with a diameter of 13 mm and more preferably the passage of a test specimen with a diameter of 10 mm. This ensures that the coarse filter can filter out smaller and larger branches, paper waste and cigarette butts from the wastewater, so that the risk of clogging or damage of the fine filter is minimized.

In a further advantageous embodiment of the invention, the lower end of the fine filter in the installed position of the road or bottom inlet is spaced from the bottom of the road or bottom inlet in the installation position of the road or bottom inlet. This will ensure that yourself Dirt particles contained in the wastewater can settle at the bottom of the filter chamber without polluting the fine filter. Preferably, the distance is less than 15 cm, more preferably less than 10 cm, and most preferably about 7 cm.

In such an embodiment of the invention, the collecting chamber may expediently have a fluid opening to the filter chamber, wherein the fluid opening is arranged at the bottom of the road or bottom inlet in the installation position and has a maximum height which is not greater than the distance of the lower end of the fine filter from the bottom of the road or bottom run. The advantage of this is that when cleaning the collection chamber, for example by suction, the bottom of the filter chamber can be cleaned by means of conventional suction devices without further additional or assembly work in one operation.

In another embodiment of the invention, a road or ground drain with a holding liquor retaining means, comprising at least one inlet, at least one collecting chamber, at least one filter chamber, at least one valve chamber and at least one outlet is characterized; wherein the at least one outlet and a substantially in the installed position of the road or bottom inlet upwardly, closed by a valve drain inlet which forms a sealing element or in an installed position of the road or bottom inlet almost horizontal sealing seat directly or via a sealing element, wherein the sealing seat of a trained as a closing body for the valve float is tightly closed, characterized in that the road or bottom inlet formed by a substantially in installation position of the road or bottom inlet horizontally arranged separating bottom settling chamber, wherein the settling chamber in installation position of the road or bottom inlet is disposed above the collection chamber, and wherein a fourth fluid connection connects the inlet to the settling chamber, the second fluid connection connects the collection chamber to the filter chamber, the third fluid connection connects the filter chamber to the valve chamber and the fourth F luidverbindung the settling chamber connects to the collection chamber. The additional settling chamber has the advantage of being in the wastewater containing dirt particles that settle in a stagnant water at the bottom, do not settle in the collection chamber and / or filter chamber, but separately in the settling chamber. The arrangement of the settling chamber above the collecting chamber allows easy cleaning of the settling chamber.

In a preferred embodiment, the dividing floor extends over the entire horizontal cross-section of the road or floor inlet in the installation position of the road or floor inlet.

In order to prevent the deposited in the settling chamber dirt particles are flushed through the fifth fluid connection into the collection chamber, the dividing bottom expediently has an overflow pipe.

For cleaning purposes of the collection chamber, the filter chamber and / or valve chamber of the partition bottom is advantageously formed in two parts, with a part of the road or floor inlet is removable.

Preferably, the removable part of the separating tray is concentrically surrounded by the other part of the separating tray.

In such an embodiment, it is advantageous to detachably connect the removable part of the partition floor to the other part of the partition floor, so that the two parts can not move relative to each other in the connected state. This prevents a gap formation between the two parts of the separating bottom. In the case of a gap formation, wastewater could pass directly into the collection chamber, the filter chamber and / or valve chamber without first passing through the second, third or fifth fluid connection and thus bypassing the coarse and / or fine filter. Preferably, the two parts of the separating bottom are releasably connected to each other by means of at least one pivotable bolt. In practice, the use of two Vorreibern has proven to be particularly practical, since they can be pivoted by means of a rod and the operator does not need to bend over.

In a particularly expedient embodiment of the invention, the removable part of the dividing floor has an eyelet, so that the removable part of the dividing floor can be easily lifted out of the road or floor inlet by means of a hook or the like.

In a particularly advantageous embodiment of the invention, the removable part of the separating tray and / or the other part of the separating tray have means which fix the position of the two separating tray parts to one another. This ensures that the fifth fluid connection arranged on the separating tray is always correctly positioned, so that it connects the settling chamber to the collecting chamber and, for example, not the settling chamber with the filter chamber or valve chamber.

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 Feinfilter (Koaleszenzfilter) in die Schnittebene geklappt ist,

Fig. 5

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

Fig. 6

eine Detailansicht eines Trennbodens zur Verwendung in einem erfindungsgemäßen Straßen- oder Bodeneinlaufs

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 Fig. 2 , with water filling and opened valve;

Fig. 4

a view along the section line III-III in Fig. 2 in which, for a better overview, the dividing wall with the fine filter (coalescence filter) is folded into the sectional plane,

Fig. 5

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

Fig. 6

a detailed view of a partition for use in a road or Bodeneinlaufs invention

The road or ground run according to FIG. 1 is for example for roads, courtyards, squares and similar traffic areas, as well as gutters or trenches along determined by highways. The inner division is off FIG. 2 seen. Like from the Figures 3 and 4 it can be seen, the road or ground inlet according to the invention has an inlet 1 and frame 2, which is supported by a concrete ring (not shown, in itself EP 0 904 471 B1 . FIG. 3 , known there 29). Surrounded by the frame 2 inlet 1 is covered by a grid 3. In the frame 2 brackets (for clarity, not shown) mounted on which the upper edge of a foliage retention basin 4 is seated. The frame 2 has a downwardly extending collar 22 which is overlapped by the upper edge region of a collecting container 5. The outer cross section of the collar 22 corresponds to the inner cross section of the collecting container 5, wherein the collecting container in the illustrated embodiment has a diameter of about 475 mm. The collecting container 5 is sealed by a seal against the collar 22. In this way, forces acting on the grid 3 and the frame 2 can not be transferred to the collecting container 5, since it is vertically displaceably connected to the collar 22 of the frame 2 supported on the concrete ring (not shown).

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 (0.9 - 9.98 kg / dm ³ , preferably by 0.97 kg / dm ³ ) than the water displaced by it, so that he, like the FIG. 3 shows, floats in the water and thus at a correspondingly high level of water 23, the drain inlet 8 opens. If the floating body 10 is surrounded by a liquid which has a lower density than the floating body 10, for example gasoline with a density of 0.72 g / cm ³ , this floating body 10 sinks into the liquid and thus closes the drainage inlet 8.

The valve formed by the drain inlet 8 with the sealing seat 9 forming a sealing seat and the floating and closing body 10 is located within a Valve chamber 18, in which the floating and closing body 10 is in particular vertically freely movable to release the drain inlet 8 at a corresponding water level. In a preferred embodiment, the third fluid connection connecting the filter chamber to the valve chamber terminates laterally from the drain inlet, more preferably below the drain inlet. As a result, the problem is reduced that the float 10 flushed at suddenly rising water flow to the sealing seat and so the water flow rate of the road or bottom inlet is only temporarily reduced. In order to ensure a secure closure of the valve 8, 9, 10, it is expedient if the largest horizontal extent of the valve chamber 18 is not further away from the edge of the drain inlet 8, as half of the smallest horizontal diameter of the float 10 corresponds ,

The collecting container 5 is divided by a partially recoverable and at least two-part separating tray 11 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 is connected via an overflow pipe 14 with the collecting chamber 13, so that a fourth fluid connection between the settling chamber 12 and the collection chamber 13 is present. In the illustrated embodiment, the overflow pipe 14 has a diameter of about 125 mm, so that through the overflow pipe 14, a hose of a suction device with a diameter of about 100 mm can be performed.

The arrangement of the overflow nozzle 14 is off FIG. 4 and FIG. 2 can be seen, wherein the nozzle 14 in FIG. 2 is shown extended in the drawing plane. The inlet opening 15 of the overflow nozzle 14 is located at a distance from the separating base 11, in the illustrated embodiment, this distance is about 150 mm, near the bottom of the foliage retention basin 4. The outlet opening 16 of the overflow nozzle 14 is located at or slightly below the partition 11, Preferably, about 10 mm below the partition bottom 11, but well above the drain 6 and thus the water level 23rd

In this way, a sedimentation tank 12 is created in which sludge located in the water can settle. Furthermore, it is ensured that the wastewater is distributed as finely as possible and thus the individual contiguous drops of waste water have the lowest possible kinetic energy upon impact with the liquid level 23 in the collection chamber 13 in order to avoid continuous mixing of the water and the light liquid and thus the separation of the To improve light liquid.

The collecting container is divided by at least two substantially vertical partitions 17 into the collecting chamber 13, valve chamber 18 and filter chamber 21. In the partition wall between the collection chamber 13 and the filter chamber 21, a passage opening 29 is provided which forms a second fluid connection between the collection chamber 13 and the filter chamber 21 so that the liquid located in the collection chamber 13 can enter the filter chamber 21. In this case, the fluid connection between the collection chamber 13 and the filter chamber 21 comprises a coarse filter 34. As a result, the coarse dirt, such as branches, larger pieces of paper or cigarette butts located in the wastewater is filtered out of the wastewater before it enters the filter chamber 21. Between the filter chamber 21 and the valve chamber 18, the liquid must pass through a fine filter (coalescence filter) 20, which is integrated into the third fluid connection between the filter chamber 21 and the valve chamber 18, whereby a further separation of distributed droplets of light liquid is achieved, so that as little as possible From the restrained light liquid in the valve chamber 18 passes. The fine filter (coalescence filter) 20 filters out small and smallest droplets of oil or gasoline from the effluent and purifies them into larger droplets, which then rise up to the oil layer floating there on the wastewater. If larger amounts of oil pass behind the fine filter 20, then they push the water located under the oil layer through the drain inlet 8 until the floating and closing body 10 is only in oil or fuel and thereby drops and the drain inlet 8 closes. As a result, the valve 8, 9, 10 must be active only in extreme cases.

In case of downpours, the passage cross section of the passage opening 29 may be too low to ensure a sufficiently rapid outflow of rainwater. Therefore, an overflow opening 19 is provided on the upper side of the partition wall 17, via which wastewater can then enter the filter chamber 21 when the collecting chamber 13 floods. The passage cross-section of the coalescence filter 20 is chosen to be sufficiently large that the wastewater quantity flowing into the filter chamber can be continued into the valve chamber 18.

The freely flow-through cross section of the coarse filter 34 is greater than the freely flow-through cross section of the fine filter 20, so that no suction effect between the filter chamber 21 and the collection chamber 13 is caused by the water flowing from the filter chamber 21 into the valve chamber 18, d. H. no negative pressure is created in the filter chamber.

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

In extreme dryness, 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 of the float 10 drops to the sealing seat of the drain inlet 8 and thus closes the drain inlet 8 on its own weight. As a result, not only is the drying out of the odor trap formed by the siphon shape of the manifold 7 slowed, but the closure of the drain inlet 8 itself largely prevents the escape of fermentation gases into the collecting container 5 and via the inlet 1 into the environment. Therefore, the road or bottom inlet according to the invention can also be advantageously connected without the manifold 7 directly to the channel, which can be particularly advantageous in narrow streets of the Old Town or very deep channel.

The separating tray 11 between the settling chamber 12 and the collecting chamber 13, the filter chamber 21 and the valve chamber 18 is formed in two parts, of which part of the dividing tray is removable from the collecting container 5. The removable part 36 of the partition 11 is surrounded concentrically by a fixed part 37 of the partition 11, the fixed part 37 of the partition 11 having a width of 7 cm. The removable part 36 of the partition 11 is detachably connected to the fixed part 37 of the partition 11 by means of at least one pivotable bolt 26. Thus, a movement of the partition 11 upwards is largely prevented. This prevents, for example, in a backwater in the channel that the separating tray 11 floats or pushed up and in particular the float 10 can be flushed by the return flow from the valve chamber 18, whereby the retention function would be largely lost to light liquids. Furthermore, this prevents that the removable part 36 of the separating tray 11 is accidentally lifted during the sucking of the settling chamber 12 and thus brought out of its position.

In order to clean the collecting chamber 13, the filter chamber 21 and the valve chamber 18, the removable part 36 of the separating tray 11 is removed from the collecting container 5, so that the chambers can be sucked out. In order to facilitate the cleaning work, the removable part 36 of the partition 11 has an eyelet 35, so that the removable part 36 of the partition 11 can be removed from the sump 5 by means of a hook without the cleaning personnel having to reach into the sump 5.

In order for the removable part 36 of the separating tray 11 to be inserted into the collecting container 5 again after the cleaning work, the removable part 36 of the separating tray 11 and the fixed part 37 of the separating tray 11 have means which communicate the position of the two separating tray parts 11 relative to one another establish. In the illustrated embodiment, these means consist of two on the fixed part 37 of the partition 11 mounted elevations 39 and a pin 40 on the removable part 36 of the partition 11, which engages between the two elevations 39.

As the FIG. 3 shows the liquid level 23 in the reservoir 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, z. B. when the liquid is water. If, instead of water, there is a liquid of lesser density than that of the floating body 10 in the valve chamber 18, then the floating body 10 sinks onto the edge of the drain inlet 8 provided with the elastic seal 9 and closes the drainage inlet 8. The retention capacity of light liquid is determined by the volume the collection container 5 limited and the retained light liquid must be sucked out of the sump 5, if necessary, and disposed of.

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

Thereby, the problem can be avoided, which arises from the fact that can be flushed by sudden increase in the flow of water, the float 10 on the sealing seat 9. Due to the inertia, the water which has previously flowed into the drain inlet 8 at high flow velocity still partially enters the channel, so that the water remaining in the drainage bend 7 does not reach the float 10. In the so-forming cavity between the water level in the manifold 7 and located on the valve seat 9 floats 10 creates a negative pressure, which is essentially determined by the water column difference on the inlet and outlet side of the manifold 7, and in practice is usually so high in that floating of the floating body 10 from the sealing seat 9 is prevented if a high retention safety against light liquids is to be provided.

Particularly high is this negative pressure in such operating conditions when not in the channel in the immediate vicinity of the road or bottom inlet a ventilation device, for. As a manhole, is located or the channel is completely flooded due to the wastewater. By arranging a ventilation 28 of the drain inlet 8, a pressure equalization with the atmosphere can be brought about and the float 10 can float up again and release the drain inlet 8, so that further dirty water can run off. The ventilation 28 does not affect the sealing function against entry of light liquids into the channel.

As a result, the risk that contaminated with light liquids contaminated or rainwater by flooding the road boundary or the area to be drained seeps uncontrollably in the surrounding soil, significantly reduced. Furthermore, it is no longer necessary that after a sudden heavy downpour employees of the street cleaning must move out to make supposedly clogged sewage water inlets functional again. For this purpose, it has hitherto been necessary to empty the flooded waste water inlet and remove all inserts and installations in order to remove the float 10 from the valve seat 9, which is not only a tedious, but also time-consuming and therefore costly work.

Preferably, the end of the line 28 facing away from the drain inlet 8 ends near the inlet 1, z. Thus, the risk of flooding of the line 28 is very low and in the case of a major accident with light liquids remaining risk of low leakage of light liquid in the channel via the line 28 minimized. A rapid pressure equalization is also ensured if the line 28 should be flooded, since a pressure equalization then takes place by the emptying of the line 28 into the drain inlet 8.

To damage the line 28, which expediently consists essentially of polyethylene and z. B. may have an inner diameter of 8 mm, to avoid the suction of the collecting container 5, the line is 28th preferably attached to the outside of the collection container. In order to avoid an impairment of the function of the ventilation of the line 28 even in the usual in civil engineering rough conditions, the line 28 is guided in a hollow rail 30, which is welded to the sump 5 and expediently also consists essentially of polyethylene.

To further facilitate cleaning of the collecting container 5, the fine filter (coalescence filter) 20 is spaced from the lower bottom of the filter chamber. In the example shown, this distance is 7 cm. The partition wall between the collection chamber 13 and the filter chamber 21 has below the coarse filter 34 has a passage opening which preferably extends from the lower bottom of the collecting container 5 to the coarse filter 34 over the entire width of the partition wall 17 and has a height which is not greater as the distance of the fine filter (Koaleszenzfilters) 20 from the lower bottom of the collecting container 5. This ensures that forms a layer of water below the coarse filter 34 and the fine filter (coalescence) 20. If this layer of water is sucked out through the collection chamber 13, a suction is simultaneously produced in the filter chamber 21 and the dirt is simultaneously sucked out of the collection chamber 13 and the filter chamber 21, whereby a separate cleaning of the filter chamber 21 becomes superfluous.

The operation of the device according to the invention is as follows: Wastewater flows through the grate 3 in 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 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 rest of suspended particles continues to drop, so that only water and finely divided therein contained z. B. oils or fuels through the coarse filter 34 in the partition 17 into the filter chamber 21. The coarse filter retains any impurities contained in the wastewater, such as smaller branches, paper waste or cigarette butts. The liquids, which have a lower specific gravity than water, and neither in the collection chamber 13 nor in the Filter chamber 21 were retained, 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 that has a lower density than the float, the density preferably between 0.9 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 10 is at least 1 l (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 in very soft rubber seals or at locations where waste water added with sticky substances is to be expected, for example under linden trees, if the volume of the floating body 10 is at least 1.5 l (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 about 135 mm diameter and a second spherical body attached thereto with a diameter of about 100 mm. Such a combination results in a volume of the floating body 10 of more than 1.8 l and thus a correspondingly large buoyancy force upon flooding of the water.

To clean the dirty water inlet of the grate 3 is lifted and sucked the foliage retention basin 4 and then dug out of the inlet shaft. Now, the sedimentation tank 12 can be sucked out and then the safety bolts which connect the removable part 36 of the partition 11 to the fixed part 37 of the partition 11 are released. The removable part 36 of the partition 11 can be removed by means of a rod on the eyelet 35 upwards. Due to the multi-part of the partition 11, this can be more easily removed through the relatively narrow inlet opening 1, as was previously possible in the conventional one-piece dividing trays.

Thus, the collection chamber 13 can be sucked out and cleaned. As already described above, the bottom of the filter chamber 21 is simultaneously sucked out through the opening below the coarse filter 34. If necessary, the valve chamber 18 can be sucked out. Furthermore, the fine filter (coalescence filter) 20 is accessible and can be pulled up and cleaned or replaced with a water jet. Also, the valve 8, 9, 10 is accessible from above and its parts can be cleaned.

Due to the additional cover 24, the parts of the valve 8, 9, 10 and the fine filter (coalescence filter) 20 are largely protected against accidental damage during the suction of the collecting container 13.

A road or floor inlet according to the invention can be included in the remote inspection and remote cleaning of a channel, especially if the siphon-like bend 7 is formed from 45 ° elbow elements and has an inner diameter of about 120-150 mm and a radius of curvature of at least about 140 mm. So usual channel TV equipment and so-called cleaning pigs can be driven into the manifold 7 and thus allow an inspection and possibly a flushing of the manifold 7, without the road or bottom inlet to be approached and taken apart.

In the FIG. 5 Shown according to the invention a road or bottom runway further comprises a bridging tube 32 which extends between a drain pipe 31, in which the siphon-shaped manifold 7 opens, and the interior of the road or bottom run. Conveniently, the bridging pipe 32 opens into the settling tank 12.

The bridging tube 32 makes it possible to enter the channel with inspection equipment, so-called sewer TV or cleaning pig without removing the road or bottom inlet, to inspect it and clean if necessary. As a result, such an inspection or cleaning is very easy to do so quickly and therefore cost. This possibility of a quick and cost-effective inspection and maintenance has the advantage that the value retention of the channel system is much better in the long run than if an inspection or cleaning is only performed when malfunctions have occurred.

In order to ensure the function of an odor trap and to avoid that at very high water level in the road or bottom inlet possibly light liquids can get directly into the channel, the bridging tube 32 is provided with a water and gas-tight closure 33, suitably in the form of a screw cap with seal. This ensures both an effective seal and a quick removal if necessary.

In order to obtain an access path provided with the smallest possible radii of curvature for a sewer TV or a cleaning pig, it is expedient if the angle between the longitudinal axis of the collecting container 5 and the bridging tube 32 is approximately 60 ° and the angle between the longitudinal axes of the drainage tube 31 and the bridging tube 32 about 30 °.

FIG. 6 shows a detailed view of a separating floor 11 for use in a road or floor intake according to the invention. The partition floor 11 consists of a removable part 36 and a fixed part 37 which surrounds the removable part 36 concentrically. The fixed part 37 has while a width of about 7 cm. The position of the removable part 36 to the fixed part 37 of the partition 11 is determined by means for orientation. On the fixed part 37 of the partition 11, two elevations 39 are arranged, wherein between the two elevations 39, a gap having a predetermined width is present. On the removable part 36 of the partition 11, a pin 40 is arranged, which protrudes beyond the outer periphery of the removable part 36 of the partition 11. The pin 40 in this case has a width which corresponds to the width of the gap between the two elevations 39. When inserting the removable part 36 of the partition 11 in the fixed part 37 of the partition 11 can be determined by this means clearly the position of the removable part 36 to the fixed part 37. In this case, the position of the removable part 36 to the fixed part 37 is solely and solely considered correct when the pin 40 engages in the gap between the two elevations 39.

The removable part 36 and the fixed part 37 of the partition 11 can be detachably connected to each other. Serve in the described embodiment, the pivotable latch 26. The fixed latch 26 are fixed, for example, on one side and can be pivoted about this fixed point. If the latches 26 are fixed, for example, to the fixed part 37 of the separating base 11, then the latches 26 are swiveled inwards over the removable part 36 of the separating base 11 after the detachable part 36 of the separating base 11 has been inserted into the fixed part 37 of the separating base 11. Since the bolts 26 are now above the removable part 36 of the partition floor 11, a floating of the removable part 36, which could be caused for example by an overflow of the road or Bodeneinlaufs prevented.

In the removable part 36 of the partition 11 of the overflow pipe 14 is arranged. At the overflow pipe 14 and the removable part 36 of the partition 11, an eyelet 35 is further arranged by means of which removable part 36 of the partition 11 can be removed from the sump 5.

1 -

Einlauf

2 -

Rahmen

3 -

Gitterrost

4 -

Laubrückhaltebecken

5 -

Sammelbehälter

6 -

Ablauf

7 -

Krümmer

8 -

Ablaufeinlass

9 -

Dichtring

10 -

Schwimmkörper

11 -

Trennboden

12 -

Absetzkammer

13 -

Sammelkammer

14 -

Überlaufstutzen

15 -

Einlassöffnung

16 -

Auslassöffnung

17 -

Trennwände

18 -

Ventilkammer

19 -

Überlauföffnung

20 -

Feinfilter

21 -

Filterkammer

22 -

Kragen

23 -

Wasserspiegel

24 -

zusätzlicher Deckel

25 -

Handgriff

26 -

Riegel

27 -

Aufnahme

28 -

Leitung

29 -

Durchtrittsöffnung

30 -

Schiene

31 -

Ablaufrohr

32 -

Überbrückungsrohr

33 -

Verschluss

34 -

Grobfilter

35 -

Öse

36 -

herausnehmbarer Teil

37 -

feststehender Teil

39 -

Erhöhungen

40 -

Stift

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 -

partitions

18 -

valve chamber

19 -

Overflow opening

20 -

fine filter

21 -

filter chamber

22 -

collar

23 -

water level

24 -

additional lid

25 -

handle

26 -

bars

27 -

admission

28 -

management

29 -

Through opening

30 -

rail

31 -

drain pipe

32 -

pass pipe

33 -

shutter

34 -

coarse filter

35 -

eyelet

36 -

removable part

37 -

fixed part

39 -

increases

40 -

pen

Claims (14)

Road or ground inlet with a light liquid retention device comprising: - at least one inlet (1), at least one collecting chamber (13), at least one filter chamber (21), - At least one valve chamber (18), and - at least one drain (6); wherein the at least one outlet (6) has a substantially in installation position of the road or bottom inlet upwardly closable by a valve drain inlet (8) which forms a sealing element in an installed position of the road or bottom inlet almost horizontal sealing seat directly or via a sealing element;
wherein the sealing seat is tightly closed by a floating body (10) designed as a closing body for the valve,
characterized in that
the inlet (1) has a first fluid connection to the collection chamber (13),
the collection chamber (13) has a second fluid connection to the filter chamber (21),
the filter chamber (21) has a third fluid connection to the valve chamber (18),
wherein the second fluid connection comprises a coarse filter (34), and
wherein the third fluid connection comprises a fine filter (20). Street or floor inlet according to claim 1, characterized in that the flow-through cross-section of the coarse filter (34) in the second fluid connection is greater than the flow-through cross section of the third fluid connection. Road or floor inlet according to claim 1 or 2, characterized in that the flow-through cross-section of the coarse filter (34) in the third fluid connection is greater than the flow-through cross section of the sequence (6). Road or floor inlet according to one of claims 1 to 3, characterized in that the passage openings (29) of the coarse filter (34) are formed so that the passage of a spherical test body is prevented with a diameter of 15 mm, preferably that the passage of a Spherical specimen with a diameter of 13 mm and particularly preferably with a diameter of 10 mm is prevented. Road or floor inlet according to one of claims 1 to 4, characterized in that in the installation position of the road or bottom inlet bottom end of the fine filter is spaced from the bottom in the installation position of the road or bottom inlet bottom of the road or bottom inlet. Street or floor inlet according to claim 5, characterized in that in the installation position of the road or bottom inlet bottom end of the fine filter of the bottom in the installation position of the road or bottom inlet bottom of the road or Bodeneinlaufs a distance of less than 15 cm, preferably less than 10 cm and more preferably has a distance of about 7 cm. Road or floor inlet according to one of claims 1 to 6, characterized in that the collecting chamber (13) has a fluid opening to the filter chamber (21), wherein the fluid opening is arranged at the lower bottom of the road or bottom inlet in the installed position and has a maximum height which is not larger than the distance of the lower end of the fine filter from the lower bottom of the road or bottom inlet. Road or Bodeneinlauf according to the preamble of claim 1, characterized in that the road or bottom entry through a settling chamber (12) formed substantially in the installation position of the road or bottom inlet horizontally arranged separating tray (11), wherein the settling chamber (12) is arranged in the installation position of the road or bottom inlet above the collecting chamber (13), and wherein a fourth fluid connection connecting the inlet (1) to the settling chamber (12), the second fluid connection connecting the collection chamber (13) to the filter chamber (21), the third fluid connection connecting the filter chamber (21) to the valve chamber (18) and a fifth fluid connection connecting the settling chamber (12) connects to the collection chamber (13), characterized in that the separating base (11) is formed at least in two parts and wherein at least one part (37) is fixedly connected to the collecting container and at least a part (36) is removable from the collecting container , Street or floor inlet according to claim 8, characterized in that the separating floor (11) extends over the entire installation position of the road or floor inlet horizontal cross section of the road or floor inlet. Road or floor inlet according to claim 8 or 9, characterized in that the separating base (11) has an overflow nozzle (14), wherein the overflow nozzle (14) is formed as part of the fourth fluid connection. Road or floor inlet according to one of claims 8 to 10, characterized in that the removable part (36) of the separating tray (11) is concentrically surrounded by the fixed part (37) of the separating tray (11). Road or floor inlet according to one of claims 8 to 11, characterized in that the removable part (36) of the separating tray (11) with the fixed part (37) of the separating tray (11) is detachably connectable, preferably by means of at least one pivotable bolt ( 26). Street or floor inlet according to one of claims 8 to 12, characterized in that the removable part (36) of the separating base (11) has an eyelet (35). Road or floor inlet according to one of claims 8 to 14, characterized in that the removable part (36) of the separating tray (11) and / or the fixed part (37) of the separating tray (11) have means (39, 40) which determine the position of the two partition parts (36, 37) to each other.

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