EP2337902A1

EP2337902A1 - Storm drain (gully), and method for operating the same

Info

Publication number: EP2337902A1
Application number: EP08874983A
Authority: EP
Inventors: Bernd Schladitz
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-10-22
Filing date: 2008-10-22
Publication date: 2011-06-29
Anticipated expiration: 2028-10-22
Also published as: WO2010045953A1; EP2337902B1; DE202008017663U1

Abstract

The invention relates to a storm drain (gully) and to a method for operating the same, having an upper inlet chamber and a lower outlet chamber separated therefrom by means of an inlet chamber floor, wherein the outlet opening of the inlet chamber is through a pipe or a siphon lying at a significant distance above the inlet chamber floor, and having an outlet pipeline in the outlet chamber that can be closed by means of a float. In order to achieve a significantly improved function and also prevent an overflow, the invention proposes that a bypass (20) is provided through which excess discharge water can flow in case of overload, the upper end thereof opening into the inlet chamber (5) above the outlet opening (8) of the inlet chamber (5), and the lower end (22) thereof opening into the outlet pipeline (12) below the valve (13, 14).

Description

Street inlet (Gully), as well as method of operation of the same

The invention relates to a road inlet (Gully), and a method for operating the same, with an upper inlet chamber and a separate bottom through a separating bottom outlet chamber, wherein the outlet opening of the inlet chamber through a pipe or a siphon is significantly above the inlet chamber floor, and a with a floating body closable outlet conduit in the outlet chamber according to the preamble of claims 1 and 15.

From DE 36 20 182 Al a so-called road inlet is known, in which an upper inlet chamber and a lower outlet chamber is provided. In the upper chamber protrudes into a neck, so that a down flow is reached only when the upper

Inlet chamber is filled so far that the water level exceeds this nozzle.

Furthermore, it is known to provide in the lower region, ie in the course of the outlet chamber means with a Float form a valve, which then closes when light liquid is present in the street inlet. This prevents light liquid from entering the sewage system.

From EP 0904471 Bl, a road inlet is known, in which between the upper inlet chamber and lower outlet chamber as in DE 36 20 182 Al a pipe extends, which projects far into the upper inlet chamber, so that above floating liquid can drain first, and Thus, a first separation between light liquid and water in relation to the sequence of the AbIaufVorganges is caused. Furthermore, the first particles are already settling above.

However, unlike the first mentioned prior art, EP 0 904 471 B1 describes, as a significant novelty, that the tube also protrudes far into the outlet chamber down to the point where the tube opening ends below the outlet of the outlet chamber.

This is a considerable disadvantage for the following reasons. If the tube protrudes very far down into the outlet chamber, in the outlet chamber, in which settle heavy metals and light liquids to separate by the falling, guided in the tube jet of drain water so much swirled that it is a mixture of actually to be separated substances comes. Thus a separation is not possible efficiently. As a result, light liquids can even pass through the turbulence of the float valve.

This is further exacerbated in this known design, by in the case of excessive Fallwassermengen the floor drains of this type can no longer dissipate this capacity. This becomes critical when in heavy downpours, the floor drains are overloaded and thus initiate the flooding of the roads. As stated above, causes strong

The special design of the pipe gives rise to a turbulent mixing of actually-to-be-separated pollutants and light liquids, so that in this case no more efficient separation takes place.

The invention is therefore based on the object to propose a different solution than in EP 0904471, in which on the one hand a turbulent flow of the liquid level is prevented in the outlet chamber, so that a physical separation of heavy metals and light liquids in the outlet chamber in a fluidic considerably calmer room can take place. Furthermore, it is part of the task that additional constructive provisions are made, which automatically enables the road entry in an emergency situation (flood, excessive rain) to increased drainage capacity.

The stated object is achieved by the characterizing features of claim 1.

Further advantageous embodiments are specified in the independent claims.

With regard to a method, the object is achieved by the features of claim 15. Essence of the invention is that a bypass which can be passed through in the event of an overload of overflowing waste water is provided which opens at the top into the inlet chamber above the outlet opening of the inlet chamber and opens at the lower end behind the valve into the outlet line of the outlet chamber.

This bypass thus represents a fluidic short circuit of excess accumulating water to drain by the outlet chamber is not flowed through directly, as long as these excessive amounts of water incurred. In this case, the bypass according to the invention is placed so that it is only actively flowed through when the inlet chamber must absorb more water than through the outlet opening of the inlet chamber down into the

Outlet chamber can drain. In this case, the water level in the inlet chamber namely increases so far that it reaches the level of the upper mouth opening of the bypass, and thus can flow directly through the bypass. If the external water supply drops, the level in the inlet chamber decreases to such an extent that it is again possible to discharge it via the outlet opening of the inlet chamber.

In a further advantageous embodiment, it is stated that the pipe or the siphon ends between the inlet chamber and outlet chamber with its opening at the lower end directly below the bottom of the inlet chamber, without further hineingeur in the outlet chamber. As a result, the flow is down much calmed down than in the aforementioned prior art. This avoids a turbulent swirling of the heavy metals settling in the outlet chamber. Thus, the heavy metals are already effectively separated from the accumulating water. Likewise, there is no turbulence and mixture with the light liquids instead, so that a controlled normal operation of the thus cleaned dirty water can take place.

In order to calm the flow down further is further advantageous that the lower opening of the tube, which faces into the outlet, is provided with a circumferentially formed Abtropfkontur and / or a downwardly flared funnel-shaped screen. This leads to a spontaneous widening of the flow cross-section of the falling down through the pipe water. This causes a further calming of the downflowing water, whereby thereby a turbulence is further avoided. In this case, the tube down immediately open out into the funnel, and the lower edge of the funnel can in turn have a drip edge.

In a further advantageous embodiment, it is stated that the outlet below the lower chamber is divided into two parallel chambers via a vertical partition, such that in a serving as a settling chamber chamber enters the above entering via the inlet chamber liquid, and in the other part of the chamber valve is arranged ,

Furthermore, it is advantageously configured that in the vertically arranged partition wall between the settling chamber and the valve chamber, a passage opening is arranged, which extends down to the bottom of the settling chamber serving as the sub-chamber, and reaches up to about half the height of the settling chamber. Here the flow continues into the valve chamber. The said opening only goes up about half the height of the lower chamber, because up the light liquids are to secrete, because they float on water.

Advantageously, this passage opening may be provided with a sieve, through which particles are kept. This is important, therefore, to prevent coarser particles from being entrained and obstructing a secure sealing fit of the float ball on the valve seat.

In a further advantageous embodiment, it is provided that a second bypass is designed as a tube whose first opening opens into the upper part serving as Absetzkammer partial chamber of the outlet, and opens the second opening from above into the valve chamber serving as Teilkämmer the outlet chamber. This can be pushed further from above into the valve chamber with massively depressing excessively heavy water from above on floating liquid. There is then another volume for light liquids available when the volume in the upper part of the settling chamber is already filled with light liquid. If this light liquid actually collected in the settling chamber is overflowed into the valve chamber, the valve closes and also prevents its outflow into the drain line. In this case, only the available volume for light liquid increases. This is exactly the function of this second bypass.

In a further advantageous embodiment, it is stated that the lower junction of the main bypass is positioned with respect to the height below the float. The excess sewage water is removed via this to ensure additional, albeit partially unfiltered, fall water discharges in the case of imminent flooding. In the case of imminent flooding known street enemas, as mentioned in the aforementioned prior art, hinder the flow of water so strong that the congestion caused thereby inevitably leads to a flood of the road. This is to help prevent the road entry according to the invention.

In a further advantageous embodiment it is stated that the outlet conduit is designed as a siphon whose outlet height is above the center of gravity of the float. This results in a balanced overall

Derivation of the water. In addition, this creates an odor barrier to the main sewage system.

In a further advantageous embodiment, it is stated that the bypass in cross section is approximately equal to the

Cross section of the lower outlet conduit of the outlet chamber, i. the valve chamber is. Thus, on the one hand, the already separated light liquid is held back via the closed valve, but nevertheless the full cross-section of the outlet line is used to drain the excessively occurring water.

As an alternative to the valve ball, the float can be designed as a flap with float bodies. This is advantageous for certain cases when structurally the

Valve function must be integrated into the outlet pipe. For example, if the entire street inlet must be made very compact and small-sized. In order to accomplish the reliable separation between water and floating light liquid, it is stated that the float (s) of the flap and the ball-shaped float have a density of between 1 and 0.7 such that the respective float creates buoyancy in a water environment and sinks in an oil environment or in a light fluid environment and closes the valve seat.

In an advantageous embodiment it is provided that the bypass extends outside next to the inlet and the outlet chamber.

Alternatively, for constructive reasons, it may also pass internally as an integral tube through the inlet and outlet chambers.

With regard to an operating method, the essence of the invention is that in case of excessive wastewater attack (overload case) by means of a bypass temporarily reduced first the excess capacity in the filtered flow and instead the excess dirty water is removed, and that in parallel yet at least a partial capacity of the dirty water is still cleaned until after sunken

Waste water accumulation the capacity of the road inlet for the normalized waste water attack is sufficient again.

The invention is illustrated in a design example in the drawing and described in more detail below.

It shows Figure 1: side sectional view of the street inlet

FIG. 2: top view of section through FIG. 1

Figure 3: Perspective view of the street inlet

Figure 1 shows a side sectional view of an embodiment of a road inlet 1. This is on the roadside or on squares embedded in the ground and serves to discharge the water from the street or squares. The street inlet 1 is known to be covered by a cover grille 2. Below the cover grille 2, the road inlet consists of a barrel-shaped housing 4, in which all the necessary technical details are arranged. Under the cover grille 2 a removable basket-shaped Laubfangsieb 3 is arranged. Including the container of the street inlet 1 is divided into several chambers. In essence, an upper chamber is arranged as an inlet chamber 5 directly under the leaf trap screen 3. The

Inlet chamber 5 is separated via a separating bottom 9 of the lower chamber.

The lower chamber is again subdivided into a sub-chamber, which is designed as an outlet chamber 6, and a sub-chamber, which is designed as a valve chamber 7. These two lower sub-chambers are in turn separated from each other by a vertical partition 15, which, however, has a passage opening 16.

From the top coming outflow water, which can also carry light liquids such as oils, fats, gasoline, etc., enters the upper inlet chamber 5 via the leaf trap screen. Between the upper inlet chamber. 5 and the lower, serving as a settling and collecting chamber part chamber 6 of the outlet chamber extends a tube 8. The tube 8 is positioned so that the upper inlet opening 8 "lies well above the partition bottom 9. This has the function that initially the water Partial filling inlet chamber, so that entrained light liquids that float on the water surface above with rising water level in the inlet chamber first reach the inlet opening 8 "of the tube 8, and virtually through this overflow first through the tube 8 down into the settling and collection chamber serving sub-chamber 6 flow. Only then does the water follow. In this way, for a solid already at the top of the inlet chamber 5 solids, heavy metals, etc, which were not already intercepted by the leaf trap 3. With continued water supply from above, the entire liquid level will then reach the inlet opening 8 ", and drain down through the pipe correspondingly down into the chamber 6. The partial chamber 6 serves as a further settling chamber for heavy metals and large heavier ones

Festoffe. Through the passage opening 16, in which optionally also a fine filter or a fine sieve element can be arranged, a flow into the valve chamber 7 takes place. Since the passage opening 16 does not extend all the way to the top in the sub-chamber 6, the light liquids, or fat, oil, gasoline, fuels etc float on the liquid level on top and collect in the upper part of the sub-chamber 6. the light liquids settle in the sub-chamber 6 above, i. above the upper edge of the passage opening 16 from, or be collected there.

For the located in the valve chamber 7 part of the drain water is a drain on the valve float 14 instead. The float 14 sits on a final outward drain siphon 12. The edge surface of the siphon rests on the float is designed as a valve seat 13, for example, by a soft, sealing material. This float has such a density that it rises when surrounded only by water, but closes when it is surrounded by light liquid.

First, the light liquid in the sub-chamber 6 will float up and fill the local volume of the edge of the through hole 16 up to the separating tray 9. In other words, this volume represents the collection volume for the light liquids.

But fall from the outside of large volumes of water, so that the normal drain capacity down through the sub-chambers is no longer sufficient, so enters the emergency, in which to avoid flooding the road, first of all everything

Fall water must be dissipated as quickly as possible. At this moment, the prevention of flooding has the temporary priority over the separation between water and light liquid. At this moment, the bypass 20 according to the invention enters into action. Its inlet opening 21 lies above the inlet opening of the tube 8.

The water level reaches this entrance only if the insufficient normal

Drain capacity causes a backwater. The system thus regulates itself without further mechanical switching means. As a result, water / light-liquid-separating drain is physically bypassed via the pipe 8 only when the discharge capacity via the pipe 8 is no longer sufficient, and thus the liquid level rises above the level of the inlet opening 8 ".

The bypass 20 opens via a pipe connection 22 in the drain siphon 12, and indeed fluidly behind the valve seat 12 in the drain siphon 12 a.

In this way creates a fluidic short circuit for this temporary emergency, so that first the backwater from above to prevent or reduce flooding opens directly into the drain 12, and thus the rest of the street inlet and the passage is bridged by the chambers.

Only when the discharge capacity is sufficient again, the liquid level in the inlet chamber 5 will decrease so far that the process again takes place via the tube 8 and the separation of water and light liquid and heavy metals, etc again becomes active.

In the event that the floating in the lower part of the chamber 6 light liquid layer but dammed down, so a second bypass 10 leads to a

Transfer of light liquid from the as

Collection chamber serving partial chamber 6 in the valve chamber

9. But even here, the light liquid floats on top, and should it reach the level of the float 14 down, the float 14 closes and keeps the Leichtflüssikeit back. By the transfer of light liquid through the second bypass 10 thus automatically increases the collection volume for light liquid, which is then collected not only in the serving as a collection chamber chamber 6 but also in the valve chamber 7.

In the case of temporary maintenance, the light liquids collected in this way are extracted from above.

The design of the tube 8, which ends immediately at the bottom of the partition 9, is not only structurally different from the aforementioned prior art, but quite significantly also functionally different therefrom. Thus, the outlet opening 8 "of the tube 8 has only one drip edge at the bottom, which causes the outflow flow to settle downwards when the flow cross section widens considerably in the case of strong inflow, whereas in the prior art the tube is led far into the subchamber 6.

This leads in the prior art in strong flow to an introduction of a fluidic turbulence in the liquid of the sub-chamber 6. This is the actually there targeted descent of heavy metals and soothing separation of light liquid disturbed so that heavy metals and light liquids are entrained, and the float in so swirled wastewater can no longer separate efficiently.

If, on the other hand, the exit opening 8 "ends directly at the level of the separating bottom 9, the outflow is significantly quieter, which can be assisted by additionally, but not necessarily, attaching a truncated shield 11 directly to the outlet opening 8", and Thus, the outflow cross-section downwards steadily expanded and calmed the flow laminar according to the equation of continuity. It is also advantageous if this funnel-shaped shield 11 consists of a grid of metal or plastic, for example.

FIG. 2 shows a plan view of the separating tray from a sectional view from above the separating tray 9. FIG. 2 is not a 100% sectional view of FIG. 1 but already contains a further embodiment. In this embodiment, the liquid flows into the inlet chamber 5 and from there via the pipe not directly into the lower part of the chamber 6 but initially in an antechamber 17 which is divided with a further vertical partition.

In this further partition is then again a passage opening through which the liquid further flows into the sub-chamber 6, etc. Thus, the division of the lower chamber in their sub-chambers 6 and 7 and the

Prechamber 17 to recognize. Likewise, the location of the second bypass 10.

In this case, however, further chambers may be provided below, which serve as further flow around or through flow collecting chambers.

FIG. 3 shows a perspective view. Here, the lower drain chamber is divided into 3 sub-chambers, namely the settling and collecting chamber 6, and the valve chamber 7, as well as the valve chamber still further pre-chamber 17, in which can collect down heavy metals and floating up light liquids. At this Embodiment is the passage opening 16 to the valve chamber 7 facing covered with a fine filter, and the passage from the chamber 6 to the prechamber 17 is covered with a coarse filter, or coverable.

reference numeral

1 road inlet (drain) 2 grille

3 leaf catch

4 housing

5 inlet chamber

6 outlet chamber, 1st partial chamber of the outlet chamber as settling and collecting chamber

7 outlet chamber,

2nd partial chamber of the outlet chamber as a valve chamber

8 pipe 8 "inlet opening of pipe 8 8" outlet opening of pipe 8

9 separating bottom

10 Second bypass 11 Trichelike screen

12 drain, siphon

13 valve seat

14 valve ball / float

15 Vertical partition 16 Through opening (with fine filter)

17 antechamber

18 passage opening (with coarse sieve or coarse filter)

20 bypass

21 Inlet to bypass 20 22 Inlet of bypass 20 in drain / siphon 12

Claims

claims

1. Street inlet (drain) with an upper inlet chamber and one of them via an inlet chamber bottom separate lower outlet chamber, wherein the

Outlet opening of the inlet chamber through a pipe or a siphon is significantly above the inlet chamber floor, and a closable with a float outlet pipe in the outlet chamber, characterized in that in the case of overload of excessively accumulating drain water entrömbarer bypass (20) is provided, which with the upper end (21) at the top of the inlet chamber (5) above the outlet opening (8 ") of the inlet chamber (5) opens, and with the lower end

(22) behind the valve (13, 14) in the outlet line (12) opens.

2. Street inlet (drain) according to claim 1, characterized in that the tube (8) or the siphon between the inlet chamber (5) and outlet chamber (6) with its opening at the lower end (8 "") directly below the partition (9) the inlet chamber (5) ends without further protruding into the outlet chamber (6).

3. Street inlet (drain) according to 2, characterized in that the lower opening (8 ") of the tube (8), which in the outlet chamber (6), with a circumferentially formed Abtropfkontur and / or a downwardly widening funnel-shaped screen ( 11) is provided.

4. Street inlet (drain) according to 1, 2 or 3, characterized in that the outlet chamber located below is divided into two parallel chambers (6, 7) via a vertical dividing wall (15) such that a partial chamber serving as a settling chamber (FIG. 6), the liquid entering above via the inlet chamber (5) enters, and in the other partial chamber (7) the valve is arranged.

5. Street inlet according to one of the preceding claims, characterized in that in the vertically arranged partition wall (15) between settling chamber (6) and valve chamber (7) has a passage opening (16) is arranged, which extends down to the bottom of the settling chamber and above to in about half the height of the settling chamber.

6. street inlet according to claim 4, characterized in that the passage opening (16) is provided with a sieve.

7. Street inlet according to one of the preceding claims, according to 4 or 5, characterized in that a second bypass (10) is designed as a tube whose first opening opens into the top as the settling chamber (6) serving partial chamber of the outlet chamber, and the second opening from above into the as Valve chamber (7) serving partial chamber of the outlet chamber opens.

8. street inlet according to one of the preceding claims, characterized in that the lower junction (22) of the bypass (20) with respect to the height below the float (14) is positioned.

9. street inlet according to one of the preceding claims, characterized in that the outlet conduit (12) is designed as a siphon, whose outlet height is above the center of gravity of the float (14).

10. Street entrance to one of the preceding

Claims, characterized in that the bypass (20) in cross section is approximately equal to the cross section of the outlet conduit (12) of the outlet chamber.

11. Street inlet according to one of the preceding claims, characterized in that the float is designed as a flap with float bodies.

12. Street inlet according to one of the preceding claims, characterized in that the or the float of the flap and the Floats formed as ball have a density which is between 1 and 0.7, so that the respective float in the water environment creates buoyancy and sinks in light liquid environment and closes the valve seat (13).

13. Road inlet according to one of the preceding claims, characterized in that the bypass (20) extends outside next to the inlet and the outlet chamber.

14th street entry after one of the preceding

Claims, characterized in that the bypass (20) runs inside as a tube through the inlet and the outlet chamber.

15. A method for operating a road inlet, in which a multi-chamber system

Light liquids and heavy metals separtiert from the discharge water and are held in the street inlet, characterized in that in case of excessive waste water

(Overload) temporarily temporarily reduced by means of a bypass, the excess capacity in the filtered flow and instead more the excess dirty water is discharged, and that in parallel yet at least a partial capacity of the

Dirty water is still being cleaned, until the capacity of the street inlet for the normalized waste water attack is sufficient again after a decrease in waste water.