EP0924355A2 - Rain water relief structure - Google Patents

Abstract

The defense threshold (8) width amounts to particularly virtually 25 % of the rain water overflow basin (2) periphery. The rain overflow basin is polygonal or round and is a cyclone basin with a loaded accumulator area (2a) in the first quadrant and an unloaded accumulator area in the fourth quadrant. The rain cyclone basin has a central shaft for accommodation of all control and/or regulating devices for the installation. The overflow area (9) is formed as a trough, particularly as a circulating trough with the rain overflow basin.

Description

The present invention relates to a rainwater relief system with a rain overflow basin and a retention floor filter.

The construction of houses, streets, etc. seals the floor, so that Precipitation no longer penetrates, but via a sewage network must be disposed of. The wastewater collected is heavily soiled, especially when precipitation starts and must not go into natural waters without further ado be initiated. This is especially true if the rainwater together with wastewater from households and businesses in a mixed water sewer system.

In typical settlements, water can fall through rainfall incurred that are far larger than the usual wastewater quantities in dry seasons. It is not economical, wastewater treatment plants designed in mixing systems for such a high throughput. Therefore, the rain sewage is first in a rain basin cached before it is gradually transferred to a sewage treatment plant is initiated. But rain pools can also be economically Reasons not to be built so large that they can precipitate catch in any amount. Problems also arise when rain overflow basin loads with very large amounts of water to be recorded in a short time. This is particularly because the strong associated with it Influences a desired settling of solids hinder in the rain overflow basin and rather already settled Whirl up fabrics.

Both the limited inflow problem and that of the finite rain pool volume are in the prior art already solved by overflow arrangements.

In the prior art, the rain overflow basin is used first a so-called partition structure upstream, which a Has collection chamber for water coming from the inlet. The water flows out of the collecting chamber in normal operation a line to the rain basin, at the inlet of a throttle or a slide is provided to control the flow to be limited by the line to the maximum allowed. In order to ensure sufficient water drainage, if the allowable maximum dimension over a certain Period is insufficient, the collection chamber has an overflow threshold. Water running over the threshold can then can be derived via a line.

The problem of finite rain pool volume is at a standstill the technology solved by using the rain basin as a rain overflow basin be designed, during heavy rainfall Collected water runs over a threshold and drains away becomes.

In the case of separation systems in particular, however, it is still necessary to clean the water running over the thresholds, before the water is drained. This cleaning must but not in a wastewater treatment plant designed for more polluted Water designed and is therefore a relatively expensive Wastewater treatment conditional.

To the overflowing water not untreated a receiving water i.e. the natural one intended to discharge the waste water Waters to feed the excess can in a rainwater overflow basin rainwater no longer comprehensible due to a so-called Retention floor filters are treated. This retention floor filter becomes water from the overflow of the rain overflow basin or fed from the overflow of the separating structure.

A typical retention filter is in the form of a below e.g. with a suitable seal sealed floor recess educated. There is a drainage pipe on it Filter floor arranged, the planting of moisture loving plants like reeds. In heavy rainfall jams in the normally dry retention soil filter Water, which gradually through the acting as a filter Soil seeps into the drainage system. The planting of the retention soil filter not only helps to reduce Pollutants, but also loosens the soil. This prevents that the filter through fine-grained suspended matter, etc., the can cause gradual inflation, become clogged. The filter effect is generally sufficient for an introduction of the filtered water in the receiving water.

The retention soil filter only relieves pressure in extreme precipitation directly at most a few times a year in the receiving water.

Known rainwater relief systems require large areas for the separation structure, the rain overflow basin, the retention floor filter as well as the lines and are also expensive to build and in entertainment. But you should especially in view the scarcity of public money inexpensive to buy be and be easily entertained.

The object of the present invention is to create something new to provide for commercial use.

This task is solved by the independent claims; preferred embodiments are specified in the subclaims.

A basic idea of the present invention is therefore to arrange the individual hydraulic structures relative to each other in such a way that over the overflow water is channelless and pipeless can immediately fall to where its immediate follow-up is guaranteed. It was recognized that this was due to structurally less complex and sometimes even simplifying the construction Changes to the hydraulic structures and their corresponding ones spatial arrangement in a cost-effective manner to save space and is possible while simplifying operations.

The basic idea of the invention is first embodied by in a rainwater relief system with a rain overflow basin and a retention soil filter in the overflow area a weir threshold is provided, which is directly in the retention floor filter leads. So the overflowing water will not in a pipe behind the rain overflow basin composed, i.e. e.g. channeled and over longer distances Filter fed, but gets directly into this. This saves both the construction of a long retention floor filter supply line and manifold assembly as well as floor space. If the retention floor filter not as preferred as a bottom recess with below of the ground level, but as approximately formed with an earth wall, can in the inventive installation of overflow basin and retention soil filter the walls of the overflow basin in the immediate vicinity in the inflow area also as a limitation of the retention floor filter serve what lowers construction costs.

By placing the overflow water directly into the retention soil filter can flow, and not caught behind the rain overflow basin and must be channeled, and then out of the mostly narrow channel shooting out at high speed is the flow rate of the water flowing into the retention soil filter significantly reduced without known arrangements that the water has to be trickled. This is especially true if the weir threshold width over which the retention floor filter is loaded, more than 5% and in particular approximately 25% of the size of the rainwater overflow basin. It is possible to use the rain overflow basin as a rain cyclone basin to build, in a preferred embodiment the rain cyclone basin generally charged tangentially in the first quadrant and is relieved in the fourth quadrant. Of the Relief point in the fourth quadrant can water into one trough-shaped around the storage area of the rain cyclone basin Overflow area of the same and preferably in the second quadrant, i.e. opposite the Overflow or attack relief point. A weir threshold width of almost 25% of the circumferential length of the rain overflow basin is obtained when the water is then across the width overflows at least essentially of the entire II. quadrant.

By loading the rain cyclone basin in the first quadrant and is relieved in the fourth quadrant, the floating or The floating water load of the overflowing water is minimized.

The arrangement of the one that loads the retention floor filter Overcurrent weirs in the second quadrant allow training of the overflow area as a circulation trough in which the water masses can be divided into two flow paths. This relaxes the inlet conditions in the retention floor filter continue; the risk that through in the retention floor filter masses of water poured in or uprooted the planting is significantly reduced.

If the overflow area is trough-shaped, that is preferred Storage area of the overflow basin by a first relief weir relieved into the trough and a lower one at the trough Overflow weir to the retention floor filter provided. The Water therefore flows out of the over two weir thresholds Storage area of the rain overflow basin in the retention soil filter; the second weir threshold in the flow path represents the overflow weir threshold of the Overflow area.

A sieve arrangement can be provided in front of the retention floor filter become. With trough-shaped formation of the overflow area with two weir thresholds from the storage area to the retention floor filter can in particular in a manner known per se the relief barrier of the storage area is provided be.

It is preferred that in the rainwater relief system according to the invention the first with a trough-shaped overflow area and the second weir threshold in the direction along the trough channel from each other are spaced. This prevents gushing Spill over the memory area over the first at the same time and second weir threshold directly into the retention floor filter with potentially adverse effects on planting. Rather, the water is first braked and runs slowly and evenly to the overflow weir threshold and in the retention floor filter. If the first and second weir threshold spaced from each other in the direction along the trough are, the trough bottom preferably has a slope from the first to the second weir threshold.

At the overflow area, especially in the case of trough-shaped training a third self-defense is provided in the overflow area, about which extremely large, also from the retention floor filter quantities of water that can no longer be taken in are fed to a receiving water become; Usually a retention soil filter is designed so that this is rare and at most with few rain events is required annually. In very heavy rain events is the water freight after the plant is full but mostly already so little polluted and the receiving water so strong flows through that this does not significantly affect water quality impaired. Usually the self-defense is dimensioned that it is when the retention bottom filter accumulation target is reached overflowed without further measures. It's easy for that an appropriate self-defense level is required.

In rainwater relief systems, it is particularly preferred a trough-shaped overflow area with the retention floor filter overflow weir threshold, the inflow restriction separator, which in the rain overflow basin introduced peak inflow limited, so in the rain overflow basin to integrate that the separation unit relief threshold flows directly into the overflow area, in which also the rain overflow basin overflows. So a separate line from the separator to the retention floor filter and thus also the risk of avoiding the retention floor filter damaged by water flowing in from such a pipe becomes. The overflowing water is therefore not behind the Overflow again caught in a line, i.e. e.g. channeled and fed to the filter over longer distances, but arrives right in this. This saves both the construction of a long one Retention floor filter supply line and distributor arrangement as also floor space. However, it should be noted that the compact Construction that is achieved in that in a rainwater relief system with a rain overflow basin and an inflow restriction separator the inflow restriction separator one directly in the overflow area of the rain overflow basin has overflow separation relief threshold, not only advantageous when combined with retention floor filters is. Rather, even without a retention floor filter an advantageously compact and therefore only one Get a small footprint that cheap manufacture and is inexpensive to maintain. It will be assessed be that this integrated combination of rain overflow basin and separation unit in particular, although not exclusively, advantageous for round pools such as rain cyclone pools is and despite the compact arrangement a throttled Water inflow from the separation unit into the rain overflow round basin is enabled, which is designed such that without more in the round basin, especially rain cyclone basin to previously known Arrangements hydrodynamically at least equivalent, in particular, identical flow patterns arise.

The rainwater relief system of the present is preferred Invention provided with a storage device, in particular with accumulation boards, which are formed when the overflow area is formed Trough shape can be placed transversely in the trough channel. By if necessary, the stowing device is prevented from Water flows into the retention floor filter, for example when the retention floor filter must be maintained. In such a case the inflow water quantity is simply direct via an emergency drain directed into the receiving water. The storage device is also at gradual expansion of rainwater relief systems according to the invention or can be used when retrofitting existing systems. At existing, conventional rain cyclone basin could initially the existing basin with a trough-shaped overflow area be provided, or an existing overflow area overflow weir according to the invention are arranged and, if necessary, installations in a possibly existing central shaft; the previous pool thus becomes the storage area of the overflow pool a system according to the invention. Until the retention floor filter is completed on this converted pool the overflow water with damming boards in the trough over the Self-defense directed and discharged as before, where necessary the overcurrent weir can also be temporarily increased can.

The retention floor filter can be directly behind the weir threshold Stones such as grid stones, paving stones or the like. have the surge of water flowing into the filter weaken. Grass pavers are due to their availability and their low price particularly preferred.

The retention floor filter itself can also have an overflow threshold, i.e. an overflow weir, which directly or indirectly leads to the receiving water to make the water very large To derive precipitation.

Next or instead, the retention floor filter can also be used an earth wall raised from excavated earth or the like be surrounded to make the retention floor filter a larger one Arrange stowage area without actual filtering. So can far larger amounts of water are absorbed than with the actual one Retention floor filter possible. The retention floor filter subordinate stowage area does not have to for Water filtering must be designed, so no drainage system, none Have planting, etc. Rather, the traffic jam area if the water load declines via the retention soil filter empty by returning the water. The actual Retention bottom filter can, as is generally preferred, as Be deepened so that its storage target on or is slightly below the normal floor level.

To the retention soil filter after a precipitation event The retention floor filter can drain as needed be pumped dry via the drainage system, in particular using a solar-powered feed pump. This can be used since the retention soil filter after a precipitation does not have to be dried out instantaneously, but the draining completely sufficient within a few days; out of this Weak feed pumps can be reasonably reduced with accordingly Power requirements are used.

The drainage of the drainage system is in the rainwater relief system preferably controllable. So through drainage or throttling at the beginning of precipitation even with low Evenly deposit the retention soil filter with water covered and the infiltration is not exclusively concentrated on the inlet area near the weir threshold. A uneven loading of the filter with a corresponding uneven sediment piling is avoided by at least the entire pore space of the filter is jammed, i.e. completely moistened or covered the floor surface becomes. It is preferred to hold it until the water in the Retention space has reached a height of a few centimeters. This will also help the growth of unwanted plants prevented that are entered in the filter and typical are not water loving.

It is understood that when the congestion target is reached or earlier, i.e. the maximum or desired water level in the retention soil filter, the drainage system barrier was opened becomes.

Provided a rain cyclone basin with a central supply shaft can be used as a rain overflow basin, in particular the accumulation arrangement, the feed pump, when forming the circulation area a trough-clear water rinsing supply as overflow trough etc. as essential control and / or regulating devices and - systems can be accommodated in the central shaft. This is preferred the water from the retention filter with a Culvert under the rain overflow basin into the central shaft and led out of this.

Figur 1

eine Regenwasserentlastungsanlage gemäß der vorliegenden Erfindung;

Figur 2

eine Detailansicht einer erfindungsgemäßen Regenwasserentlastungsanlage mit einem ersten Regenüberlaufbecken;

Figur 3

eine Detailansicht einer erfindungsgemäßen Regenwasserentlastungsanlage mit einem zweiten Regenüberlaufbecken;

Figur 4

eine Draufsicht auf einen zentralen Bereich des Regenüberlaufbeckens von Figur 3, teilweise im Schnitt;

Figur 5

einen Querschnitt durch den Retentionsbodenfilter längs der strichpunktierten Linie V-V;

Figur 6

eine bevorzugte Ausführung einer Entlastungswehrschwelle;

Figur 7

eine weitere Regenwasserentlastungsanlage gemäß der vorliegenden Erfindung;

Figur 8

eine Detailansicht der Regenwasserentlastungsanlage von Figur 7.

The invention is described below only by way of example with reference to the drawing. In this shows

Figure 1

a rainwater relief system according to the present invention;

Figure 2

a detailed view of a rainwater relief system according to the invention with a first rain overflow basin;

Figure 3

a detailed view of a rainwater relief system according to the invention with a second rain overflow basin;

Figure 4

a plan view of a central area of the rain overflow basin of Figure 3, partially in section;

Figure 5

a cross section through the retention bottom filter along the dash-dotted line VV;

Figure 6

a preferred embodiment of a relief barrier;

Figure 7

another rainwater relief system according to the present invention;

Figure 8

a detailed view of the rainwater relief system of Figure 7.

According to FIG. 1, a rainwater relief system 1 or Rain relief system 1 a rain overflow basin 2 and a retention floor filter 3.

2, the rain overflow basin 2 has a general tangential feed channel 4 for the supply of mixed waste water or, in the case of separation systems, rainwater from settlements and the like. At the bottom of here in a preferred Embodiment as rain cyclone basin 2 formed rain overflow basin 2 is a drainage channel 5 with a pipeline 6 provided, which to a sewage treatment plant, another rain overflow basin or the like. Preference is given to a swirl throttle 6a leading to the sewage treatment plant 6 or the like.

The rain overflow basin 2 has an inner edge 7 which with the exception of a relief barrier 8 on the whole Circumference has the same height and thus an inner storage area 2a of the rain overflow basin 2 defined. The relief barrier 8 is preferably removed in terms of flow arranged from the inlet. In the arrangement shown in Figure 1 with incoming in the first quadrant and clockwise circulating water (as indicated by arrow 10) the relief weir threshold 8 in the fourth quadrant.

The relief weir threshold 8 relieves the inner storage area 2a of the rain cyclone basin 2 into a trough-shaped Overflow area 9, which is formed here as a circulation trough. Its outer wall 11 is generally full over its entire circumference the same height, which can be as high as the height of the rain cyclone basin. On the relief weir 8 diametrically opposite Side (Figure 1) is the outer wall 11 of the Overflow area 9, however, lowered to an overflow weir threshold 12 to form, which directly in the directly subsequent inflow region 13 of the retention floor filter 3 leads. The width of the overcurrent weir threshold 12 is preferred large; it can do at least a substantial fraction of a quadrant comprise or, preferably, the entire quadrant. Larger weir threshold widths are possible as long as hydraulically perfect functioning is guaranteed; at Lengths over 25 or 30 m, such as occur when one Weir threshold width of two quadrants can be selected Weir threshold designed horizontally adjustable as required become.

In the retention floor filter 3 can, preferably immediately behind the overflow weir threshold 12 large stones, pavement, or in particular grass pavers 14 in the surge path of the Overflow water can be arranged.

Due to the diametrically opposite arrangement of the relief barrier 8 and the one open to the retention floor filter Overflow weir threshold 12 lead through the circumferential overflow area 9 two flow paths 15a and 15b from the first to the second weir threshold. The trough bottom 16 has in each Flow path 15a, 15b a downhill to the overflow weir threshold 12 Slope on, as by the dashed line in Figure 2 indicated. In each flow path 15a, 15b from the Relief weir 8 to overflow weir 12 can a stowing device 17a, 17b can be arranged, for example can be realized by storage boards or the like can to establish a water connection between the relief weir 8 and the overflow weir 12 to interrupt.

There is a self-defense threshold along at least one flow path 15a, 15b 18 provided in the outer wall 11 of the overflow trough, which connects the overflow area with an emergency drain 19, which leads to the receiving water, for example. The high of Self-defense threshold, i.e. the emergency relief threshold, corresponds preferably the retention target height of the retention floor filter, so that the water in the emergency drain without further measures flows when the congestion target is reached.

According to FIG. 1, the retention floor filter 3 is a depression formed, which is adjacent to the circulation trough 9 of the rain cyclone basin 2. With the excavation 20 of the recess 21 can also a wall around the retention floor filter an enlarged storage area around the retention floor filter to define around. In such a case the overflow weir threshold preferably above ground, but below the top of the rampart lie. In the recess 21 are from bottom to top a seal 23 is stacked on the natural base 22 from geomembranes, mineral waterproofing or the like, e.g. drainage embedding layer constructed as a gravel bed 27 with drainage pipes 28 running therein and, over this layer, several filter layers 29a, 29b, on and in which plants 30 grow, as preferred Reed.

The retention floor filter 3 may be up to one Height to be accumulated, dashed as the traffic jam line 31 is drawn. If the retention filter with a Earth wall is surrounded, the traffic jam line is above the ground lie.

The rainwater discharge system of the present invention is operated as follows:

First, when there is light rain in a settlement collected rainwater as mixed or separating water over the tangential inflow 4 of the storage area 2a of the rain overflow basin 2 fed, passes through it in a cyclonic Movement as indicated by arrow 10 and flows through the pipeline 6 to a sewage treatment plant.

With increasing rainfall, the inflow of water via the feed channel 4 larger than the maximum possible discharge through the pipeline 6. In this case the water gradually in the storage area 2a of the rain overflow basin 2 increase. Meanwhile, the rain is weakening without it comes to an overflow, all the water flows in and out after through the pipeline 6 to the sewage treatment plant. The rainwater relief system thus works in light rainfall as a purely temporary store, which the large amounts of water, such as they occur in the event of precipitation until they are clarified.

However, if the rains are heavy and / or persist for a long time, the water in the rain overflow basin keeps getting bigger rise until the water level reaches the level of the relief barrier 8 has reached. As soon as this is the case, it flows Water from the storage area into the trough-shaped circulation area 9 along the slope 16 to the diametrically opposite Page. So water collects in the circulation trough and the water level rises here too. As soon as the water in the circulation trough reaches a height corresponding to the overflow weir threshold 12 has, it is from the overflow area of the rain overflow basin directly into the entrance area of the retention floor filter flow over the one belonging to the overflow area Overflow weir threshold 12 without the water through a channel or the like to the retention floor filter 3 must become.

The overflow weir 12 is so wide that the water is slow and flows evenly into the retention floor filter 3; also will that in the retention floor filter 3 over the weir barrier 12a flowing water in one during extreme rains nevertheless gushing and undesirably violent movement slowed down by the grass pavers 14. That way prevents that falling into the retention floor filter 3 Water lying in a direct flow line Plants 30 can outline and so at these points Filters impaired or destroyed.

With continued rainfall, the retention soil filter will change 3 continue to fill until finally the water level has reached the height of the traffic jam line 31. As soon as this the case is another inflow of water into the retention floor filter 3 undesirable; it will be appreciated that the size of the retention floor filter is typically chosen so is that such a situation is rare, if possible only occurs a few times a year. The water level has one in such a case, however, the self-defense threshold has already been reached; therefore there can be no further overflow of water in the retention floor filter 3, because the water is be discharged via the self-defense 18. It can be provided In these rare cases, supply water directly to the receiving water. Since this only happens during very heavy rainfall, is not a significant impairment of the water quality to fear. Such a supply of water the rain overflow basin in the receiving water or the like otherwise also be provided if, for example, the retention floor filter must be maintained or in other exceptional situations. In such a case, the accumulation tables are in the circulation trough introduced the water directly into the emergency drain pipe without filling the retention floor filter.

In the retention soil filter, this becomes during the precipitation up to the dam line 31, water gradually accumulates in the Penetrate the floor while being filtered. After leakage through the different filter layers 29a, 29b get into the Layer 27 in which the drainage pipes are laid. It penetrates into the drainage pipes and can through the drainage manifold 32 passed as sufficiently clarified into the receiving water become. Thanks to the good filter effect of the retention floor filter it will only be necessary in exceptional cases the water from the drainage pipe still needs further clarification to subjugate. The process of leakage of water and its derivation into the receiving water will continue until the retention floor filter is dry again and therefore ready is for the absorption and filtering of the next precipitation.

The possibly with the water over the weir threshold 12 in suspended matter entering the retention soil filter will settle on the retention floor filter over time, but the soil 30 is loosened by the plants and an inflation or colmation prevented or at least significant decreased. Therefore, there is no risk that the filter clogged with transported mud over time.

Although plants 30 collect the retention soil filter 3 can prevent the relief weir 8, in the trough 9 or screens 32a, 32b are also provided on the overflow weir threshold 12 in order to feed coarse material into the Decrease filter.

The retention floor filter can also be used, preferably on another side facing away from the rain overflow basin 2 Weir 33 have an emergency overflow, over which very violent Rain events can cause water to flow into the receiving water. In this case, the accumulation plates 17a, 17b do not have to go into the circulation trough be inserted, but the water overflows the length of the retention floor filter up to self-defense 33 of the retention soil filter and from there into the receiving water.

It is understood that the rainwater relief system of present invention not only for the absorption of rainwater, but also for temporary storage and treatment any other precipitation, including hail, snow, as well spring water, etc., is suitable.

Another preferred embodiment of the present Invention will now be described with reference to Figures 3 and 4, in which similar or functionally identical Elements bear the same reference numbers as before and therefore not be described again. In Figure 3 are relevant Heights above an arbitrary reference line with large Letters marked, where general, but not mandatory, the heights of A increase starting with the alphabet and same heights have the same letter.

Deviating from the rain overflow basin described with reference to FIG. 2 3 in the basin of FIG Head 34 accessible central shaft 35 provided in the especially the control of the rainwater relief system can be accommodated. The central shaft 35 is according to the figure 4 divided into several areas, namely on the one hand in one Cyclone basin drain area 36a and on the other hand in the retention floor filter drain area 36b.

The cyclone pool drain area 36a is with the storage area 2a of the rainwater overflow basin via a mechanical or electrically operable slide 37 and a feed line 38 connected and empties the rain overflow basin via a vortex throttle 6a or the like in a discharge channel to a sewage treatment plant or another, downstream rain overflow basin.

The retention floor filter waste water area 36b in the central shaft is divided into two chambers, namely an entry chamber 39 and into an outlet chamber 42, between which a connecting pipe 43 is arranged.

Water from the drainage network 28 is introduced into the inlet chamber 39 guided, the outlet piece 44 of the drainage network 28 T-shaped is formed. One arm 44b of the T-piece is in one Height C above the floor of the entrance chamber (height A) horizontal led into the chamber and usually with one Slider 45a closed. The other arm 44a of the tee protrudes into the chamber and has an opening 46 at height E. A rinsing pump 47 is assigned to the inlet chamber 39 Water optionally from a point 49 close to the ground in a height B or from a level above, such as height E, can suck. The pressure side of the flushing pump 47 is on a line 50 is connected, which leads into the trough channel 9. The irrigation pump 47 has sufficient power to the circulation trough 9 rinse as required after a rain event; the inlet chamber 39 thus also serves as a reservoir for sufficiently clean rinse water, i.e. as rinsing chamber 39. From the inlet chamber 39 can also water for filter control be removed.

The inlet chamber also has a water level probe as required (not shown) for control purposes.

The entry chamber 39 communicates via a connecting pipe 43 with the outlet chamber 42. In the connecting pipe 43 is one Sequence control 51 arranged that the water flow in dependence throttle from the water level and / or preferably entirely can lock. The bottom passage edge of the connecting pipe 43 lies at a height F corresponding to the height F of the drainage system 28 or a bit below and thus on or below the level of the pore space lower edge of the retention floor filter 3rd

A sump is formed in the outlet chamber 42, which is up to a height D below the mouth height F of the connecting pipe 43 is lowered. The swamp is initially parallel with one pipeline 50 going down to the central shaft wall provided that has a T-piece at its lower end. A Arm of the T-piece is led through the wall to the entry chamber and at height C with a normally closed one Provide slider 45b. The other arm is with a drain pipe connected that runs under the rainwater overflow basin to outside of the rain overflow basin area at a height G in a drain to the receiving water or the like.

The mouth height G of pipeline 50 is optionally above the pore space, ie above height F, so that at least from the lower edge of the pore space water not without support can get into the receiving water.

The suction line 52 projects into the sump of the outlet chamber 42 a drainage pump 53 protrudes. On the print side is the Drainage pump 53 to a drainage line 54 with preferably small diameter of e.g. 2 inches provided leads to a discharge to the receiving water.

Typically, it is sufficient to drain the retention floor filter to be carried out over a period of a few days; therefore, a drainage pump 53 is smaller Pumping power is sufficient and will be completely satisfactory Results. A drainage pump 53 with small Pumping rates such as 0.1 liters / second can be problem-free be fed with solar power, so that when building the Rainwater discharge system removed from the mains on one expensive and complex power connection dispensed with can be. However, this only makes sense if the Trough gutter rinsed with a solar-powered flushing pump 47 becomes. However, it is necessary to use large amounts of water to flush the trough in a short time gushing through the trough. Therefore, the pumping power, as with solar power operated pumps are achievable, it is generally required be to provide a surge flush in which a volume of water is slowly being filled up again and then emptied into the gutter like gushes. If desired, a single solar powered pump could be provided which can be selected via a three-way water valve steadily filling and periodically draining trough gutter flushing or a drainage line 50 supplies and if necessary at various points in the central shaft 35 sucks in water.

The overflow area 9 of the rain cyclone basin according to FIG. 3 differs differs from that of the rain cyclone basin according to FIG. 2 further in that on the inner wall of the trough opposite the overflow weir 12 a residual water emptying flap 55 is arranged on the trough bottom is. This is articulated on its lower edge 55a and has a float 55b on its upper edge. A lock 54c locks the residual emptying flap 55 watertight wall 7 of the rain cyclone basin. The lock is 55c manually or automatically on mechanical or electromagnetic Unlockable way.

On the outer wall of the trough is opposite the relief barrier 8 a self-defense 56 arranged (Fig. 3). The self defense 56 with a height N is lower than the relief barrier 8a with height O, but higher than the overflow weir threshold 12a with height M and can in particular with the congestion target reached water level N.

The rainwater relief system with the rain overflow basin 3 operates as follows:

When it rains, water first flows into the storage area 2a of the Rain cyclone basin 2 through the feed line 4 and runs under partial storage from pipeline 6 to the sewage treatment plant, until the water level is so high (height M) that the relief weir 8 water enters the circulation trough 9, the slope 16 flows from height K to height J and over the overflow weir threshold 12a directly into the retention floor filter 3 flows.

The water flowing into the retention soil filter 3 seeps first enters the inflow area and enters the drainage network and flows through opening 46 into the entry chamber where an Water rise is detected with the water level probe. The order the opening 46 above the chamber floor prevented thereby whirling up mud.

The retention floor filter sequence control closes at the beginning Overflow of the overflow weir 12 first the connecting pipe 43 so that no water from the inlet chamber 39 can drain and the water both in the inlet chamber 39 as well as increases in the retention floor filter 3. This continues until the filter base is jammed, thus preventing one Excessive filter load in the entry area of the retention floor filter through water seeping only there. Optional can also delay the release of the connecting pipe 43 until the water is a few inches above the filter bottom stands (height J), at the same time the growth registered Encounter plants.

Once the water level probe detects that the retention floor filter 3 is sufficiently dammed, the water drain in Connection pipe 43 released for a desired water flow. If necessary, one can be used for a desired filter throughput required throttling can be made.

When the water rises, the dam line N is reached and the water via the self-defense 56 in a roughly leading to the receiving water Drainage flow.

When the process control is open, the retention floor filter drains 3 at least partially via its drainage system 28, the inlet chamber 39 of the central shaft 35, the Connection pipe 43, the outlet chamber 42 and the pipeline 50 to drain into the receiving water. At the same time, water can be used for testing purposes be removed or pumped out.

The water level in the retention soil filter 3 gradually increases lose weight. This process continues until the water level has dropped to the mouth height G of the pipeline 50. To active drainage is not required at this level.

However, it is generally procedurally desirable that the retention floor filter 3 is completely empty or dry falls. This is how the full one for the next loading event Retention floor filter absorption capacity restored and ensures re-ventilation.

In order to completely drain the retention floor filter 3 from the outlet chamber 42 water with the drainage pump 53 pumped out through drainage line 54, so that by the connecting pipe 43 water from the inlet chamber 39 water flows, whereupon the retention floor filter 3 in the Entry chamber 39 further emptied. Because the lower edge of the connecting pipe 43 at a height F corresponding to the height of the Drainage network 28 or below runs, the Retention floor filters are pumped dry in this way.

After the precipitation has ended, water can be flushed with the irrigation pump 47 can be introduced into the trough to any existing or remaining deposits after unlocking the residual water emptying flap 55 from the trough into the rain cyclone basin storage area 2a wash out. The water turns on a point well above the floor, about height E to avoid sucking in sludge. This Type of cleaning is particularly advantageous because it is used for rinsing the filtered water is used. That with contaminants Water loaded from the trough channel 9 comes with the residual water through the residual emptying flap 54 into the storage area 2a of the rain overflow basin 2, from where it goes through the pipeline 6 reached the sewage treatment plant.

Due to repeated use, it accumulates in the drainage network 28, and in the ascending culvert realized by line 50 gradually mud and the like. This is big Eliminate intervals, such as annual maintenance, by pumping all the water up to height B close to the level 47 Bottom is pumped out of the inlet chamber 39. Then be the slides 45a and 45b are opened and this in the lines 28 and 50 standing residual water due to the difference of remaining water level B and slide height C with the mud step into the chamber. The water can then already with the existing sludge in inlet chamber 39 must be removed beforehand.

By the outgoing culvert branch into the already deepened inlet chamber the drain chamber must be built less deep and is easier to walk on.

Another preferred embodiment of the invention will be described with reference to Figures 7 and 8. In these are similar or functionally identical elements provided with the same reference numbers as before and therefore not to be described again in their effect and function.

According to FIG. 7, a rain overflow basin 2 has a central one Rain overflow basin storage area 2a, which has a relief threshold 8 into a trough-shaped overflow area 9 is relieved with outer trough wall 11, on which water over an overflow weir threshold 12 into a retention soil filter 3 flows in, stones 14 arranged in the inflow region are integral to a dividing structure 60 for reduction in the central storage area 2a of the rain overflow basin 2 flowing water inflow to a given maximum amount to limit.

The separating structure formed integrally with the rain pool 2 60 communicates via a running below the trough 9 Connection 61 with the supply duct or supply pipe 4. The connection 61 leads on the one hand via a Throttle 62 is approximately tangential as is generally the case in the prior art known in the rain overflow basin formed as a rain cyclone basin 2. The connecting line is via a riser line 63 61 connected to a side chamber 65 upwards, which in Trough 9 is separated by walls 64a, 64b, 64d and 64e. The Walls 64a to 64d have the same height as the outer edge of the trough 11 while the concentric between inner and outer Trough wall extending partition 64e is designed lower. The bottom of the separator chamber 65 is preferably for the riser 63 downhill to complete emptying in precipitation-free Ensure times. The partition 64e preferably has a height which is greater than the height the discharge defense threshold 8 and thus also higher than that Overflow weir threshold 12 (see FIG. 8).

The further arrangement of the rainwater relief system is like described above; so emergency procedures can be used for maintenance purposes and the like can be provided.

The rainwater relief system with the rain overflow basin and the integrated separator is operated as follows:

Water is throttled via supply line 4 and connecting line 61 Way into the central rainwater overflow basin storage area 2a headed. The throttle 62 is on this set the desired flow.

The inflow 4, 61 communicates here via the riser 63 with the side chamber 65 in the trough area 9. In this way a small reservoir is first filled when the on the throttle 62 set amount of water is not sufficient to let all water flowing in through supply line 4 pass through. If the side chamber 65 is filled, water is on the lower partition 64e fall into the trough area 9 and from there into the retention floor filter over the overflow weir threshold 12 and this stones 14 downstream in the direction of flow flow. On this ensures that in normal operation with low water pollution all water through the rain overflow basin can flow into the sewage treatment plant through line 6. At long, but not very intense rains the water from the central rain overflow basin storage area 2a over the discharge weir threshold 8 in the trough 9 and thence slowly over the overflow weir threshold 12 into the retention floor filter introduced. Only with extremely violent ones Water will precipitate through the lower partition 64e from the side chamber 65 realizing the partition structure, which is separated in the trough 9 by walls 64, flow and also be gently absorbed in the retention floor filter 3. On this way the retention floor filter 3 is also responsive of the dividing structure optimally against a gushing flow of influence protected. The inflow energy of the inflowing Water is in turn over the broad overflow weir threshold 12 harmlessly distributed over a large area.

It is understood that the combination of unloading and rain overflow basin do not necessarily have to be connected a retention soil filter behind the rain overflow basin is bound. Advantages are due to the compact arrangement according to the invention also with conventional rain overflow basins, in particular round rain overflow basin such as rain cyclone basin.

It is to be understood that the present invention is for example only has been described for illustrative purposes and variations are easily possible.

So the relief weir 8 as well as the separator threshold a diving wall 8a, which is on the water 57 floating light materials 58 such as gasoline prevents in the To reach overflow trough 9, cf. Fig. 5. Accordingly the lower partition 64e may also be formed.

Also, the overflow weir does not necessarily have to be as shown Overflow weir lie above the filter base, but can be about finish flush with this. If in such a case the Overflow area as a circulation trough with a relief weir above of the filter base, it may be preferred shooting the water into the retention filter Limit stones, tablets or the like.

It can also be provided that the rain overflow basin in the To be placed in the middle of the retention floor filter and not at the edge. In this case, particularly wide overflow weirs can be implemented become.

It is also conceivable to use a retention floor filter with a larger storage area that does not serve the actual filtering surrounded by earth walls or the like is. In such a traffic jam area, this can happen during extreme rainfall accumulating water can be stored until after Decrease the water load on the retention floor filter flows back to the drainage network and seeps away from there. So can self-defense may be completely dispensed with.

Other pools can be used as round pools with circulation troughs, because in particular it is not mandatory to have a circulation trough to provide; rather, the precipitation relief system according to the invention can also be realized by the relief weir 8 and the overflow weir 12 into a single weir be summarized. In this case, the overflow area is reduced on a single weir threshold.

Any other geometric shapes for the pools are possible. So instead of round pools are polygonal, for example square Usable basin on the long side of the retention floor filter are arranged and preferably in this one overflow very wide weir threshold. The realization such a wide weir threshold has a further reduction the swell strength results in a better one Energy distribution of the inflowing water. If necessary can also have a weir threshold that can be adjusted horizontally used to be particularly long Weir thresholds, like over 30m, one across the entire width provide a uniform overflow.

Although in the illustrated embodiments, the width of the overflow weir about a quarter of the overflow circumference are smaller widths, such as only 5 or 10% of the scope can be easily realized, if through appropriate measures such as grass pavers, the are available particularly easily and inexpensively, near the overflow weir threshold excessive penetration is prevented.

Unlike shown, it would also be conceivable to use the overflow weir to make it wider than a quadrant and for example to run half the overflow basin circumference.

In contrast to the picture, the rainwater overflow basin can in particular if training as a rain cyclone basin also without rearrangement a retention floor filter with an integral separator be provided. The connection of rain overflow basins and separator is not to the specific embodiment shown of the round rain overflow basin, but can also be realized with any other rain overflow basin corresponding to a rain overflow basin with a central shaft Figure 3.

Reference list

1

Rainwater relief system

2nd

Rainwater overflow basin

2a

Rain overflow basin storage area

3rd

Retention floor filter

4th

Supply channel

5

Drainage channel

6

Pipeline to the sewage treatment plant

6a

Vortex choke

7

inner edge of the rain overflow basin

8th

Relief barrier

9

Overflow area of the rain overflow basin

10th

Flow direction in the rain cyclone basin

11

outer trough edge

12th

Overflow weir threshold

13

Inflow or surge area

14

Stones

15a, 15b

Flow paths in the circulation trough

16

Trough floor with a slope

17a, 17b

Storage boards

18th

Self-defense

19th

Emergency drain

21

Floor deepening

22

Underground

23

Geomembrane or the like

24th

Top layer

28

Drainage system

29a, 29b

Filter layers

30th

plants

31

Traffic jam line

32a, 32b

Sieve

33

Overflow weir threshold of the retention floor filter

34

ladder

35

Central shaft

36a, 36b

Drain areas in the central shaft

37

Slider

38

Drain supply line

39

Entry chamber

42

Exit chamber

43

Connecting pipe

44

End piece of the drainage pipe in the inlet chamber

44a, b

Arms of the tail

45a

Slider from first end arm 44a

45b

Sliding gate valve

46

Opening of the second tail arm

47

Irrigation pump

49

Suction point at height B

50

Discharge from the outlet chamber into the receiving water

51

flow control

52

Suction pipe

53

Drainage pump

54

Drainage pipe

55a

Flap bottom edge

55b

swimmer

55c

Interlock

56

Self-defense

57

water

58

Floating light materials

60

Dividing structure

61

Connecting line

62

throttle

63

Riser

64a-e

Partition wall; here

64

low partition

65

side chamber

Claims (21)

Rainwater relief system, characterized in that the overflow area of the rainwater overflow basin into the Retention floor filter overflowed weir threshold. Rainwater relief system with a rain overflow basin and a retention soil filter according to claim 1, wherein the Weir threshold width more than 5% and in particular approximately 25% of the rainwater overflow basin circumference. Rainwater relief system with a rain overflow basin and a retention soil filter according to one of the preceding Claims, wherein the rain overflow basin as a polygon basin or round pools, especially as rain cyclone pools preferably loaded in the first quadrant and in the fourth quadrant relieved memory area is. Rainwater relief system with a rain overflow basin and a retention soil filter according to claim 3, wherein the Rain cyclone basin a central shaft to accommodate essential or all control and / or regulating devices for the facility includes. Rainwater relief system with a rain overflow basin and a retention soil filter according to one of the preceding Claims, wherein the overflow area as a trough, in particular formed as a circulation trough with the rain overflow basin is. Rainwater relief system with a rain overflow basin and a retention soil filter according to claim 5, wherein one Device for rinsing the trough in the retention soil filter purified rainwater is provided. Rainwater relief system with a rain overflow basin and a retention soil filter according to one of claims 5 to 6, where the storage area of the rainwater overflow basin a weir threshold for relief in the trough-shaped overflow area and in the retention floor filter overflowed second weir threshold of the overflow trough than the relief barrier is. Rainwater relief system with a rain overflow basin and a retention soil filter according to one of the preceding Claims in which in the waterway before or at the overflow weir a sieve arrangement is provided. Rainwater relief system with a rain overflow basin and a retention soil filter according to one of claims 7 or 8, wherein the first and second weir thresholds in the direction are spaced apart along the trough. Rainwater relief system with a rain overflow basin and a retention soil filter according to claim 9, wherein the Trough bottom from the first towards the second weir threshold has a slope. Rainwater relief system with a rain overflow basin and a retention soil filter according to one of the preceding Claims, wherein in the overflow area for discharge very large that can no longer be absorbed by the retention filter Self-defense is provided. Rainwater relief system with a rain overflow basin and an inflow restriction separator, especially after any of the preceding claims, wherein the rainwater overflow basin an overflow area and the inflow restriction divider one immediately in the overflow area has overflow separation relief threshold. Rainwater relief system with a rain overflow basin according to the preceding claim, wherein the rain overflow basin is formed as a round pool, the overflow area the round basin is formed as an at least partially circumferential trough and the separation unit relief threshold at least forms a wall at the trough. Rainwater relief system with a rain overflow basin according to the preceding claim, wherein the header relief threshold than concentric to the rain overflow basin Ring segment is arranged in the trough and / or that Separation unit forms a ring segment chamber in the trough Rainwater relief system with a rain overflow basin and a retention soil filter according to one of the preceding Claims, with a storage device, in particular Dams, in the overflow area to prevent inflow of water in the retention floor filter over the Weir threshold by diverting water into an emergency drain. Rainwater relief system with a rain overflow basin and a retention soil filter according to one of the preceding Claims, wherein in the inflow area of the retention filter behind the overflow weir barriers are provided. Rainwater relief system with a rain overflow basin and a retention soil filter according to one of the preceding Claims, wherein the retention soil filter is a direct one or overflow threshold leading indirectly to the receiving water owns. Rainwater discharge system with a rain overflow basin and a retention soil filter, especially after one of the preceding claims, wherein the retention floor filter a storage area bordered by ramparts is. Rainwater discharge system with a rain overflow basin and a retention soil filter according to one of the preceding Claims, wherein the retention filter is a especially solar-powered feed pump for dry pumping assigned. Rainwater relief system with a rain overflow basin and a retention soil filter according to claim 16, wherein the drainage system for full retention of the retention floor filter even at low rainfall until at least to fill the pore space of the retention floor filter is lockable. Precipitation relief method, wherein collected Rainwater an overflow basin in a lot is supplied, which is larger than that from the memory possible, immediately treatable drain is the non-drainable Water in the tank rises when it reaches one certain water level overflows and the overflowed Water is introduced into a retention soil filter, characterized in that the water immediately from the Overflow basin overflows into the retention soil filter.

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