DE4129208A1 - METHOD FOR PREVENTING MISTAKE INLETS FROM A RAINWATER CHANNEL IN A PREFLOW AND SYSTEM FOR IMPLEMENTING THE METHOD - Google Patents

Abstract

The invention relates to a process for preventing wrongly directed flows out of a rainwater channel (2) from being introduced into a receiving channel. The process is characterised in that the wrongly directed flows out of the rainwater channel (2) are transferred into a waste-water channel (4). The wrongly directed flows thus do not pass into the receiving channel but are transferred to the waste-water channel (4) connected to the sewage-treatment installation. An installation for carrying out the process has a rainwater channel (2) and a waste-water channel (4) and, furthermore, a connecting line (5) therebetween having a flow slope towards the waste-water channel. A sill (18) for channelling liquid away into the connecting line is arranged in the rainwater channel, and a regulator (20) regulates the throughflow through the connecting line (5). When the water in the rainwater channel (2) exceeds a defined level, the regulator (20) blocks off said channel towards the waste-water channel (4) and opens it again when the water falls below said level. Instead of a regulator (20) a pump (34) may also be provided which conveys the liquid from the rainwater channel (2) to the waste-water channel (4). <IMAGE>

Description

In the past there have been repeated reports and reports water pollution from rainwater outlets Separation systems. There are many reasons. Often is unknown cause of the citizen. The pollution from mistake Connections are created during renovation work in companies or households Through confusion, sources of dirty water are transferred to the Rainwater sewerage connected. The search for these Misconnections using a remote eye or signal fog is very bad time, cost and personnel consuming. More not too under Appreciative causes are washing up consisting of oil, propellant Remnants of material, tire abrasion from roads and distributions in the domestic area, draining sewage tanks from coaches or mobile homes, construction work or facade cleaning or the Car wash on the roadside. With all false introductions from Waste water or waste water, hereinafter also referred to as tap water designated, in the rainwater system, two things can happen ren:

• 1. The amount of water is sufficient to reach the receiving water arrive and occurs there, due to the flow delays tion, as "tap water" in an immeasurable amount Hours off, or  
• 2. The amount of water introduced is in the deposits of Rainwater channel added and only when it starts Washed out rain as a bump of dirt.

Finally, when rain starts, floating substances can over Road inlets flushed into the rainwater channel and forward floodlights are removed.

It is an object of the present invention to provide a method to indicate with which it can be largely prevented that Incorrect discharges from a rainwater channel into a receiving water reach.

The task is solved in that the incorrect introductions the rainwater channel into a dirty water channel will. The invention takes advantage of the fact that at Separation systems parallel to the rainwater sewer a dirty water channel that is connected to the sewage treatment plant. By the removal of the incorrect discharges from the rainwater channel and The dirty water or Wastewater withdrawn from the rainwater canal and the sewage treatment plant fed. To ensure that up to the receiving water Incorrect discharges can be disposed of in the sewer the incorrect discharges should be just before the receiving water the rainwater sewer into the sewage sewer.

According to a special development of the invention is before seen that the misfires due to a flow gradient between the rainwater channel and the dirty water channel in the latter are transferred. Continuing education does that Take advantage of the fact that in a separation system the dirty water can al is always lower than the rainwater canal and therefore in the Dirty water or waste water due to the rain water channel natural flow gradient get into the sewage canal can. There is also the possibility of making the mistake discharges from the rainwater sewer into the sewage sewer to pump. In this case, the sewer can even  be located higher than the rainwater canal.

Transferring the incorrect discharges from the rainwater channel into the sewage canal should be regulated so that it is in the rainwater channel-guided tap water and that during a rain event initially occurring waste water from the rainwater channel in the dirty water channel. It will then be exceeded a defined water level in the rainwater channel Wastewater channel closed off, as well as when the water falls below the defined water level opened again. This means that after the drainage or drainage water has been drained off Rain event then clean through the rainwater channel Rainwater is completely led to the receiving water. Only when the amount of rainwater decreases again, the transition opens to the sewage canal, so that at the end of the rain event accumulating remaining rainwater back to the waste water outlet is transported. At what water level exactly the rain water channel to the dirty water channel is blocked hangs depends on how much rainwater, d. H. such water that is not more with the dirt is supposed to leak directly. On all cases, the rainwater channel to the dirty water channel must remain open for a long time, that all tap water becomes dirty water channel is transferred.

There is a risk that dirty water from the dirty water channel in it can expediently cross the rainwater canal, that the dirty water channel is shut off to the rainwater channel is. If the rainwater channel towards the dirty water channel is not shut off, water can flow from the rainwater channel to the Cross the sewage canal, but not vice versa.

A first preferred embodiment of a system for through The procedure is characterized by rain water channel, a dirty water channel, a connecting line between rainwater sewer and sewage sewer, with one Flow gradient of the connecting line from the higher one Connection point in the rainwater canal to the lower level  closing point in the sewer, one in the area of Ver binding line in the rainwater channel arranged positive or negative threshold for draining liquid into the ver binding line, as well as the flow through the connection controller regulating the power supply line when a defined water level in the rainwater channel Closes the dirty water channel and falls below it again opens. The connecting line should also have a shut-off ment to be assigned to the dirty water channel for rain shut off water channel.

The controller assigned to the connecting line advantageously has a movable in front of the inlet opening of the connecting line Throttle device that depends on the liquid level in the Rainwater canal is controlled so that it increases Liquid level fades the inlet opening more strongly until it if the defined water level is exceeded, the inlet opening completely closed. Everything arrives in this position water flowing through the rainwater channel through its outlet to the receiving water. The throttle body can be designed as a throttle orifice det be over a float arm with a float connected is.

The main function of the controller described is thus Throttling of the connecting line to a defined one Value. This freely defined value, that of the powerful dependent on the waste water system should by Reached when the closing value is reached. After reaching the overflow mark, which corresponds to the closing value, closes Regulate the connecting line until the tidal wave of rain water channel has expired. The float measures continuously with and opens the controller after the shaft has decayed, expediently if the set amount of water is maintained up to the full Opening. When the regulator begins to open, water from the Rainwater channel through the connecting line in the manner of a Bypasses discharged to the sewer. Because of the low Opening and the relatively high water level will be high  Flow rate achieved under the throttle body. Here the bypass and the sump clean before the connection line and it will open after the regulator is fully opened also the floating substances to the dirty water system rinsed off.

The main function of the threshold, positive or negative, i.e. H. as Formed channel, is the diversion of the tap water to Connecting line. In the case of positive training result favorable hydraulic ratio with roof-shaped design nits. Another advantage of the raised threshold is in its See storage capacity. With a short-term backflow in Dirty water channel and thus closure of the connecting line, can also accumulate the water from the tap in dry weather cached and then derived. The is preferred Threshold adjustable in its overflow level.

The rainwater channel expediently has a shaft, wherein the bottom of the rainwater channel above the bottom of the shaft is arranged and the rainwater channel inside the shaft has a side opening, wherein the threshold in Area of the opening at an angle to the extent of the channel in this is arranged and the shaft base is arranged at the same level net is like the sole of the inlet opening of the connection management. The creation of a swamp as a result of the differ levels of the bottom of the rainwater channel and the shaft sole has the disadvantage of losing differential height between the rain and dirty water canal, but also many Advantages. The swamp serves to absorb the water from the tap transferring, it is an acceleration of the heavy substances and thus keep the sump and regulator clean, the sump is used to absorb the rinse pulse when it starts Rain and creates a buffer. The resulting Druckge finally increases the flow rate in the Connecting line.

It is considered particularly advantageous if between the Rainwater outlet and the connecting line a diving wall  is arranged. Pollutants in the start-up phase of a Rain through the rainwater channel to the swamp transported away by the connecting line. For floating materials or oil deposits, however, this is due to their specific Weight only when the connecting cable is exposed possible. The floating substances are swirled in the shaft and carried out. By using a baffle that firmly removable, for example as a wall, or as a swim de baffle can be carried out, the floating materials that once entered the swamp zone until the Retained connecting line and abtrans through this ported.

The shut-off element assigned to the connecting line is advantageously designed as a check valve. This must be one Always secure sealing of the sewage channel against rain form water channel, regardless of the water level in the Dirty water channel and the flow conditions when using a corresponding dirty water shaft.

Another embodiment of the system for performing the The method according to the invention is characterized by a Rainwater channel and a dirty water channel, the Rainwater channel a shaft and a rainwater outlet and the bottom of the rainwater channel above the Shaft bottom is arranged, as well as the rainwater channel in has a lateral opening within the shaft, wherein also a threshold in the area of the opening obliquely to the Er Extension of the channel is arranged in this, as well as on Bottom level of the shaft is a pump that is arranged over a line is connected to the sewer. These System described corresponds to that previously discussed, with the Difference that instead of the controller and the subordinate to it Connection line a pump the tap water through a line promotes in the sewage channel. To ensure the secure sealing of the Ensure waste water channel to the rainwater channel expedient in the flow connection from the pump to the dirt  water channel arranged a check valve.

Further features of the invention are in the description of the Figures are shown, it being noted that all features as well Combinations of features are essential to the invention.

In the figures, the invention is based on several embodiments shapes shown without being limited to these. It puts represents:

Fig. 1 is a schematic view of a first embodiment of the plant for implementing the method according to the invention, illustrated for the situation in dry weather flow,

Fig. 2 shows a plant according to Fig. 1, illustrated for the flow ratios in rainy weather,

Fig. 3 shows a system according to FIG. 1 illustrates the flow conditions in a backlog of Trockenwet ter,

Fig. 4 shows a system according to FIG. 1 illustrates the flow conditions in a flood in rainy weather,

Fig. 5 is a plan view of the shaft shown in FIGS. 1 to 4 with rainwater sewer and connecting line,

Fig. 6 shows a section according to line VI-VI in Fig. 5,

Fig. 7 shows a section according to line VII-VII in Fig. 5,

Fig. 8 shows an embodiment in which the controller system is constructed on the side facing away from the side of the dirty-water sewer Regenka Nalles

Fig. 9 shows an embodiment, a common shaft is provided with a partition in the rainwater sewer and the dirty-water sewer,

Fig. 10 is a schematic representation to illustrate the basic function of the controller system and

Fig. 11 shows an embodiment of the plant for carrying out the method using a pump.

In Fig. 1 a shaft 1 is shown, which is assigned a rainwater channel 2 , also a shaft 3 , which is assigned a dirty water channel 4 , and a connecting line 5 , which connects the shaft 1 and the shaft 3 with each other. The two shafts 1 and 3 are closed by covers 6 and 7 , the reference number 8 denotes the surface of the earth.

The sole 9 of the rainwater channel 2 is located above the sole 10 of the shaft 1 . The dirty water channel 4 is formed by a groove-like depression in the shaft 1 , the sole 11 of the dirty water channel 4 lies below the sole 10 of the shaft 1 . An end wall 12 of the shaft 1 is provided with an opening 13 which forms the inlet opening for the connecting line 5 . The opening 13 is located below the base 9 of the rainwater channel 2 and coincides with the base 10 of the shaft 1 . Starting from the opening 13 , the connecting line 5 runs at a constant gradient to the shaft 3 and passes through the side wall 14 adjacent to the shaft 1 . The connecting line 5 projects partially into the shaft space 15 . Whose shaft 3 assigned, located above the dirty water channel 4 is z. B. closed by a check valve 16 formed as a check valve.

As can be seen 5 to 7 for a slightly modified embodiment of the display of Fig., The rain water channel 2, which is formed outside the shaft 1 as a tube and is guided within the shaft 1 in a channel bed 19, within the shaft 1 a lateral opening 17 , in the area of which, starting from the bottom 9 of the rainwater channel 2 , a threshold 18 is arranged which extends obliquely to the longitudinal extent of the rainwater channel 2 . The positive threshold 18 is used to divert the upstream of the shaft 1 through the rainwater channel 2 flowing water into the sump 30 of the shaft 1 .

To regulate or completely close the opening 13 in the shaft 1 , a regulator 20 is provided as an example, which is shown in detail in FIG. 10. This has a throttle diaphragm 21 which is guided above the channel opening 13 and is connected to a drive pulley 22 which are rotatably mounted on a common fixed axis 23 . A rope 24 runs over a second disk 25 , which in turn is rotatably mounted on a fixed axis 26 . This axis 26 and the axis 23 are fastened to a common base plate 27 , which in turn is connected to the end wall 12 of the shaft 1 . Furthermore, a float arm 28 is connected to the disk 25 , the end of which, remote from the axis 26, receives a float 29 . Fig. 10 shows the throttle orifice 21 , the float arm 28 and the float 29 with solid lines for the case of minimal liquid jam or no liquid jam in the shaft 1 , the non-solid lines the parts mentioned with increased liquid jam. In the former case, the orifice plate 21 releases the opening 13 fully continuously, while with a pivoting movement of the float arm 28 a position is reached in which, as can be seen from the dashed-line representation of the orifice plate 21 , this completely closes the opening 13 . Between these two extreme positions, there are intermediate positions in which the throttle diaphragm 21 more or less blocks the opening 13 . - In FIGS. 1 to 4 and 6, for the sake of simplification, the detailed illustration of the controller 20 has been omitted and only the float arm 28 and the float 29 are shown. The upper end positions of the float 29 also differ.

The function of the system shown so far is as follows described:

The conditions that result in dry weather are illustrated in FIG. 1. The incorrect discharges introduced into the rainwater channel, ie dirty and waste water, are transported through the rainwater channel 2 to the shaft 1 . In shaft 1 , the incorrect discharges are passed through threshold 18 into the sump 30 of shaft 1 . Since the incoming incorrect discharges are so small in quantity that there is no liquid accumulation in the sump 30 , there is no floating of the float 29 , so that the incorrect discharges pass through the open regulator into the connecting line 5 and from there with a natural flow gradient to the check valve 16 over into the shaft 3 , where they collect in the waste water channel 11 and are discharged to the sewage treatment plant. At the beginning of a rain event, little rain water initially reaches the rain water channel 2 and is diverted in the shaft 1 from the threshold 18 into the swamp 30 . In this start-up phase, deposits and floating substances are released in the section of the rainwater channel 2 located upstream of the shaft 1 and, starting from the sump 30 through the connecting line 5, the dirty water channel 4 is supplied. With prolonged and intensive rain, the water level in the rainwater channel 2 will increase increasingly, so that more water gets into the shaft 1 through the lateral opening 17 and builds up there. This leads to the float 29 of the regulator 20 floating up and the throttle diaphragm 21 being moved into such a position that it closes the opening 13 to the connecting channel 5 completely. The situation in rainy weather is shown in Fig. 2, where the float 20 is flooded by the water in the shaft 1 . In rainy weather, therefore, no water gets from the rainwater channel 2 into the dirty water channel 4 , the largely clean rainwater guided through the rainwater channel 2 is fed directly to the receiving water. After the rain event, the opening point of the controller is reached again in the channel phase in the rainwater channel 2 , so that it opens the connecting line 5 again. Due to the rainwater still flowing in small quantities through the rainwater channel 2 , the dirty water channel 4 experiences a second flush with rainwater through the connecting line 5 . Floating substances and contaminants retained by the threshold 18 from the rainwater channel 2 are safely transported away in the dirty water channel 4 .

In Fig. 1, a baffle 31 is shown in the shaft 1 . The lower edge of the baffle 31 lies below the upper edge of the threshold 18 . The baffle 31 thus retains floating matter once it has reached the swamp zone, so that it can be safely transported away through the connecting line 5 after it has been opened. The reference number 31 'is alternatively a plug-in baffle. It can be removed so that no second shaft opening is required.

A backlog in dry weather in the dirty water channel 4 would inevitably lead to contamination by the connecting line 5 to the water server. To prevent this, e.g. B. a Ver connecting line 5 closing check valve 16 is provided. A second protection, but not enough, is provided by the controller 20 itself. A backflow from the dirty water channel 4 would raise the float 29 and force the controller 20 to close. The slight difference between the upper limit value of the controller 20 and the upper edge of the threshold 18 , which allows the throttle orifice 21 to open automatically, would also allow dirty water to reach the receiving water to a small extent. The conditions of the backwater in dry weather are shown in Fig. 3.

Fig. 4 illustrates the situation with a backwater in rainy weather. The processes described for FIG. 3 occur here. However, the controller 20 is activated from the side of the rainwater channel 2 . Both sides of the connecting line 5 are closed. Since the sewage channel 4 has a fault anyway, a transfer of rainwater is not useful.

FIGS. 8 and 9 illustrate alternative forms of connection of rain water and waste water channel 2 channel 4. When exporting approximate shape of FIG. 8, the controller 20 is built on the dirt water channel 4 opposite side. The connecting line 5 passes under the rainwater channel 2 and connects to the shaft 3 of the dirty water channel 4 . In the embodiment according to FIG. 9, a common shaft 32 with a partition 33 is created for the rainwater channel 2 and the dirty water channel 4 . The controller 20 is assigned to the partition 33 .

Fig. 11 illustrates the conditions for a plant, in which instead of a regulator 20, a pump 34 is disposed in the bottom 30 of the shaft 1. The system according to FIG. 11 differs from that according to FIGS. 1 to 7 only in that instead of the controller 20 the pump 34 is provided, which pumps via the line 5 into the shaft 3 , instead of the non-return flap 16 in the connecting line 5 in the flow connection from the pump 34 to the dirty water channel 4 z. B. a check valve 35 is arranged. Due to the use of the pump, the rain water channel and the dirty water channel 4 can be at any level to each other, i.e. the dirty water channel 4 is higher than the rain water channel 2 . When rain starts, the following variants are conceivable when using a pump:

• - The pump continues to pump until the end switching point is reached again,
• - The pump receives an upper switch-off point and switches after the water level drops,
• - The connecting line is with a closure member equipped, this closes the connecting line from Swamp to the sewage canal when it starts to rain. The The pump receives a float control and only empties the lower swamp,
• - the swamp is arranged as a bypass to the rainwater channel, this bypass is closed when it starts to rain.

Claims (22)

1. A method for preventing incorrect discharges from a rainwater channel into a receiving water, characterized in that the incorrect discharges are transferred from the rainwater channel into a dirty water channel. 2. The method according to claim 1, characterized in that the incorrect discharges from the rainwater just before the receiving water canal can be transferred into the sewage canal. 3. The method according to claim 1 or 2, characterized net that the incorrect discharges due to a flow gradient between the rainwater channel and the dirty water channel in the Dirty water channel can be transferred. 4. The method according to claim 1 or 2, characterized net that the incorrect discharges from the rainwater channel a pumping station can be transferred into the sewage canal. 5. The method according to any one of claims 1 to 4, characterized characterized in that initially when a rain event occurs occurring waste water from the rainwater channel in the Dirty water channel is transferred. 6. The method according to any one of claims 1 to 5, characterized characterized in that when a defined water is exceeded stood in the rainwater canal to the sewage canal is blocked off, as well as if the defined value is undershot Water level is open. 7. The method according to any one of claims 1 to 6, characterized characterized that the dirty water channel to the rainwater channel is cordoned off.   8. Plant for performing the method according to one of claims 1 to 7, characterized by

• - a rainwater canal ( 2 ),
• - a dirty water channel ( 4 ),
• - A connecting line ( 5 ) between the rainwater channel ( 2 ) and dirty water channel ( 4 ), with a flow gradient of the connecting line ( 5 ) from the higher connection point in the rainwater channel ( 2 ) to the lower connection point in the dirty water channel ( 4 ),
• - In the area of the connecting line ( 5 ) in the rain water channel ( 2 ) arranged positive or negative threshold ( 18 ) for draining liquid into the connecting line ( 5 ),
• - One the flow through the connecting line ( 5 ) regulating controller ( 20 ), which shuts off when a defined water level in the rainwater channel ( 2 ) this to the dirty water channel ( 4 ) and opens again when it falls below.

9. Plant according to claim 8, characterized in that the connecting line ( 5 ) is associated with a shut-off element ( 16 ) which shuts off the dirty water channel ( 4 ) to the rainwater channel ( 2 ). 10. Plant according to claim 8 or 9, characterized in that the connecting line ( 5 ) associated controller ( 20 ) in front of the inlet opening ( 13 ) of the connecting line ( 5 ) movable throttle element ( 21 ), which depends on the liquid level in Rainwater channel ( 2 ) is controlled in such a way that it closes the inlet opening ( 13 ) with increasing liquid level until it is completely closed. 11. Plant according to claim 10, characterized in that the throttle member is designed as a throttle orifice ( 21 ) which is connected via a float arm ( 28 ) to a float ( 29 ). 12. Plant according to one of claims 8 to 11, characterized in that the threshold ( 18 ) is adjustable in its overflow level. 13. Plant according to one of claims 8 to 12, characterized in that the rainwater channel ( 2 ) has a shaft ( 1 ), the sole ( 9 ) of the rainwater channel ( 2 ) above the sole ( 10 ) of the shaft ( 1 ) is and the rain water channel ( 2 ) within the shaft ( 1 ) has a lateral opening ( 17 ), wherein the threshold ( 18 ) in the region of the opening ( 17 ) is arranged obliquely to extend the rainwater channel ( 2 ) in this. 14. Plant according to claim 13, characterized in that the sole ( 10 ) of the shaft ( 1 ) is arranged at the same level as the sole of the inlet opening ( 13 ) of the connecting line ( 5 ). 15. Installation according to one of claims 8 to 14, characterized in that between the rainwater channel ( 2 ) and the connecting line ( 5 ) a baffle ( 31 , 31 ') is arranged which extends below the overflow level of the threshold ( 18 ). 16. Plant according to claim 15, characterized in that the baffle ( 31 , 31 ') is fixed or removable or floating mend. 17. Plant according to one of claims 9 to 16, characterized in that the shut-off element associated with the connecting line ( 5 ) is designed as a non-return flap ( 16 ). 18. System for performing the method according to one of claims 1 to 7, characterized by a rainwater channel ( 2 ) and a dirty water channel ( 4 ), the rainwater channel ( 2 ) having a shaft ( 1 ), and the sole ( 9 ) of the rain water channel (2) is arranged above the sole (10) of the shaft (1) and the rainwater sewer (2) has a lateral opening (17) within the shaft (1), further comprising a threshold (18) in the region of the opening (17 ) obliquely to the extent of the rainwater channel ( 2 ) is arranged in this, and at the level of the bottom of the shaft ( 1 ) a pump ( 34 ) is angeord net, which is connected via a line ( 5 ) to the dirty water channel ( 4 ). 19. Plant according to claim 18, characterized in that the threshold ( 18 ) is adjustable in its overflow level. 20. System according to claim 18 or 19, characterized in that a baffle ( 31 , 31 ') is arranged between the rainwater channel ( 2 ) and the pump ( 34 ). 21. Plant according to claim 20, characterized in that the baffle ( 31 , 31 ') is arranged fixed or removable or floating. 22. Plant according to one of claims 18 to 21, characterized in that a check valve ( 35 ) is arranged in the flow connection from the pump ( 34 ) to the dirty water channel ( 4 ).