EP0205013B1 - Device for regulating the spill of water from a rain reservoir or a canal duct - Google Patents

Device for regulating the spill of water from a rain reservoir or a canal duct Download PDF

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Publication number
EP0205013B1
EP0205013B1 EP86107051A EP86107051A EP0205013B1 EP 0205013 B1 EP0205013 B1 EP 0205013B1 EP 86107051 A EP86107051 A EP 86107051A EP 86107051 A EP86107051 A EP 86107051A EP 0205013 B1 EP0205013 B1 EP 0205013B1
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EP
European Patent Office
Prior art keywords
water
waste
regulating
water level
discharge
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP86107051A
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German (de)
French (fr)
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EP0205013A3 (en
EP0205013A2 (en
Inventor
Heinz Fahrner
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Oskar Vollmar GmbH
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Oskar Vollmar GmbH
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Priority to AT86107051T priority Critical patent/ATE52119T1/en
Publication of EP0205013A2 publication Critical patent/EP0205013A2/en
Publication of EP0205013A3 publication Critical patent/EP0205013A3/en
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Publication of EP0205013B1 publication Critical patent/EP0205013B1/en
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    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F5/00Sewerage structures
    • E03F5/10Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
    • E03F5/105Accessories, e.g. flow regulators or cleaning devices
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F5/00Sewerage structures
    • E03F5/10Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
    • E03F5/105Accessories, e.g. flow regulators or cleaning devices
    • E03F5/107Active flow control devices, i.e. moving during flow regulation

Definitions

  • the invention relates to a system for regulating the outflow from a rain basin or a sewer pipe of a sewerage system through an uncapped drain pipe according to the preamble of claim 1.
  • Undamped drain pipes can also run completely or partially empty when the throttle element is open, so that the flow through them can become very small in dry weather.
  • the drain pipe can be completely or partially empty and only small amounts of waste water / time can flow through it so that there is a risk of greater deposits of sludge, sand, faeces or the like in the sewer pipe or sewer downstream of the drain pipe.
  • the system according to the invention ensures that the drain pipe is only flowed through or completely shut off with relatively large amounts of waste water / time corresponding to the nominal value of the flow. As long as it flows through this relatively large nominal flow, which is provided in such a way that no overloading of the downstream sewage system, sewage treatment plant or the like occurs, the risk of greater deposits in the sewer pipe or sewer downstream of the drain pipe is considerable because of the relatively high flow rates of the waste water reduced or completely eliminated. In the remaining times, the drain pipe is shut off, so that no sludge, sand or other contaminants can get into the sewer pipe or sewer downstream from it.
  • this system according to the invention can therefore also serve to quantify the total waste water discharge from the rain basin or the sewer pipe by adding up the measured values of the flow measuring device. This is an important advantage, since it is often desirable, for example for cost calculations, planning, statistical purposes or the like. To sum up the amount of wastewater flowing out of the rain basin or the like in certain periods or in total even in dry weather.
  • the storage quantities of waste water, the blocking times for the discharge as well as the switching between regulated and blocked discharge can be adjusted and appropriately adjusted for the average inflowing water quantity.
  • the discharge of the wastewater takes place under regulation of the nominal discharge and it can, if necessary, be provided from time to time, the discharge temporarily with anomalous switching off of the regulation of the nominal value or increasing the setpoint of the regulation, preferably only for a relatively short time to increase in order to flush away dirt and mud and the like.
  • the drain pipe at the flow measuring point is completely filled with waste water and the flow meter also measures the flow exactly, so that in the event of the accumulation of the flow rate this drain is also included detected. If there are no dangers, it becomes impermissibly strong Deposits can accumulate in front of the flow measuring point, the measure according to claim 5 need not be provided naturally.
  • the invention thus also enables the total flow through the drain pipe to be recorded by summing up the flow.
  • This summation can take place in an integrator or another counter.
  • the total amount of wastewater can be displayed and / or registered, for example.
  • the display or registration can be done, for example, in cubic meters. This integrator or the like. So forms a wastewater meter.
  • an inlet channel 11 and a straight, almost horizontally laid undressed drain pipe 13 are connected, which penetrates a dry slide shaft 12.
  • This drain pipe 13 can be variably throttled and blocked by means of a throttle member 14 adjustable by an actuator 16.
  • the actuator 16 can be designed as an actuator, for example as an electric motor or electromagnetic actuator, or as a hydraulic or pneumatic lifting cylinder or the like, which acts on the throttle member 14 designed as a slide or pivotable throttle valve.
  • This flow measuring device 21 can preferably be an inductive flow measuring device measuring the flow rate or an ultrasonic measuring device, but possibly also another suitable measuring device. Furthermore, two water level sensors designed as pressure switches 24, 25 are arranged in the drain pipe 13 and are used to detect two predetermined water levels W1 and W2 in the rain basin 10. The lower predetermined water level W1 is provided so that, on the one hand, the drain pipe 13 in the area of the flow measuring point 33 is full, so that the measuring device 21 can measure the flow precisely and, on the other hand, through it the flow rate corresponding to the nominal value of the flow rate the drain pipe can be effected, preferably a significantly larger flow when the throttle member 14 is fully open.
  • the output signal of the flow measuring device 21 is applied as an actual value to the actual value input of a controller 23, at the setpoint input of which the nominal value of the nominal outflow of the rainbow 10, which can be set by means of a setpoint adjuster 22, is entered.
  • the controller 23 forms the difference between this setpoint and the measured actual value as a control deviation and, depending on this, generates switching signals which enlarge and reduce the effective cross-section at the throttle point for adjusting the respective control deviation via the actuator 16 and the throttle element 14 or when the control is switched off completely block the drain.
  • the controller 23 can be switched on and off via a bistable switching element 26, the pressure switch 24 being connected to its set input S and the pressure switch 25 being connected to its reset input R.
  • the assemblies 22, 23, 26 are contained in an electronic regulating and control device 27, which can preferably be part of a microprocessor.
  • An integrator 28 summing up the measuring signals of the flow measuring device 21, which are present, for example, as a signal sequence with a flow-dependent frequency, and which can also be referred to as a wastewater quantity counter, is used to record the total wastewater flow rate through the drain pipe 13.
  • the summation of the measurement signal can also be carried out in the device 27 and the resulting numerical value can be registered and / or displayed.
  • the meter or integrator 28 can be read at the desired times and the difference between the numerical values read at two different times then gives the total amount of wastewater through the drain pipe 13 in the relevant period. Provision can also be made for the counter or integrator 28 to be used only temporarily if the flow rate is to be totalized.
  • the controller 23 then regulates, via the throttle element 14, the flow of the drain pipe 13 caused by the flowing waste water to the nominal value specified by the set point adjuster 22. If the water level drops to the value W1 as a result of the inflow, the pressure switch 24 generates a set signal for the bistable switching element 26, which thereby switches off the controller 23, as a result of which the actuator 15 is activated by means of the throttle element 14 to immediately shut off the drain pipe 13. This means that there is no longer any waste water runoff. The drain is only through the. next time the controller 26 is switched on.
  • the controller 23 can be switched off, for example, by setting the setpoint to the value zero. Because of the shutoff of the drain pipe 13, the water level in the rain basin 10 rises again. In this way, he can never significantly fall below the value W1, so that the drain pipe 13 at the flow measuring point is always completely filled with wastewater and this, in spite of itself, could be completely or partially empty when the throttle element 14 is open, also in the area of the flow measuring point 33, which, however is prevented by the control described. If the water level reaches the higher value W2 (2nd water level) when the controller 23 is switched off, which is, for example, one meter above W1, the second pressure switch 25 responds and generates a reset signal for the bistable switching element 26.
  • W2 (2nd water level
  • the controller 23 is thereby switched on again and now regulates the discharge of the waste water to the nominal value of the flow of the drain pipe 13 again via the throttle element 14.
  • the water level drops again sooner or later until the value falls below the value W1, and then the shut-off of the drain pipe 13 and the controller being switched off are repeated 23.
  • the response threshold of the second pressure switch 25 is expediently adjustable, so that the water level W2 can be expediently set.
  • a further adjustability results from variation of the setpoint by the setpoint adjuster 22 or by abnormal switching off of the controller 23, for example with the throttle member 14 fully open, in order to achieve a discharge amount above the nominal value from time to time for flushing away deposits in front of the throttle point 14 .
  • This abnormal shutdown of the controller 23 or increase of its setpoint can take place during the total time the water level drops from W2 to W1 or also by a shorter, stronger, preferably maximum opening of the throttle element 14.
  • This switching off of the control or increasing the setpoint in order to increase the outflow can, for example, be done manually or programmed, for example with or after every nth control of the nominal outflow, where n can be, for example, 10 to 50, or in other suitable longer time intervals if it is necessary at all.
  • a sewer pipe 30 laid with a slope is connected to the drain pipe 13 shown in FIG. 2 and arranged in a slide shaft 12 according to FIG. 1 instead of a rain basin 10. To simplify FIG. 2, individual assemblies in the slide shaft 12 are not shown again.
  • the mode of operation of the exemplary embodiment shown in FIG. 2 can correspond to the previously described exemplary embodiment.
  • the throttle element 14 is closed, the water level in the sewer pipe 30 rises here.
  • the system shown in FIG. 3 differs from that of FIG. 1 essentially in that the water level sensor 24 for sensing the first water level W1 in the rain basin 10 has ceased to exist and a timer 32 is provided in its place.
  • This timer 32 is activated by the pressure sensor 25, which responds to the second water level W2, at the same time as the controller 23 serving to regulate the nominal value of the flow through the drain pipe 13, and then measures a predetermined period of time, for example 10 minutes to 1 hour, in this way It is dimensioned that even if there is no supply of waste water to the rain basin 10, by regulating the nominal value of the flow of the drain pipe 13, a predetermined first water level W1 in the rain basin cannot be undershot.
  • This first water level W1 which is not felt in this case, is considerably lower than the water level W2, but is still so large that the flow measuring point 33 of the drain pipe 13, that is to say its clear cross section in the area of the flow measuring point 33, is filled with waste water.
  • This determination of the time period to be measured by the time switching device 32, with the first water level W1 on which it is based, can correspond, for example, like the water level W1 of the system according to FIG.
  • the pressure switch 25 triggers instantaneous reclosure of the time switch device 32 and the controller 23 when the time measured by the time switch device 32 from the start of regulation of the nominal value has elapsed and thus also the drain pipe 13 is not shut off, but the nominal value of the flow is regulated again over the time measured again by the time switching device. Of course, this can still be repeated in heavy rainfall.
  • time control in such a way that the regulation of the nominal value of the flow of the drain pipe 13 is ended or at the latest when the time period to be measured by the time switching device 32 is measured from the beginning of the last drop below the second water level W2 and to the end the second water level has not been reached during this period.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Sewage (AREA)
  • Catching Or Destruction (AREA)
  • Flow Control (AREA)
  • Sanitary Device For Flush Toilet (AREA)
  • Sink And Installation For Waste Water (AREA)
  • Domestic Plumbing Installations (AREA)

Abstract

1. An installation for regulating the discharge through a discharge pipe, which is without siphons, of waste water from a rain tank (10) or a sewer pipe (30) of a waste-water sewer system, having a regulator (23) for temporarily regulating, at a predetermined nominal value, by means of a throttling member (14) associated with the discharge pipe and displaceable by means of an adjusting member, the through-flow through the discharge pipe (13), the actual value of the through-flow being measured with the discharge pipe (13) full of waste water in the area of the flow measuring-point located upstream of the throttling member (14) and by means of a flowmeter sensing the flow speed of the waste water in the discharge pipe (13), and furthermore there being provided a second water-level sensor (25) for sensing a predetermined, second water level (W2) at which the discharge pipe (13) is full of water in the area of the flow measuring-point and, the regulator (23) being put into operation to regulate the nominal value of the waste-water discharge if, by means of a rise in the water-level in the rain tank (10) or sewer pipe (30), the second water level is reached, characterized in that the discharge pipe (13) is normally shut off by means of the throttling member (14), and in that there is provided either a first water-level sensor (24) for sensing a predetermined first water level (W1) at which, although lower than the second water level, the discharge pipe (13) remains full of waste water in the area of the flow measuring-point (33), and when there is a fall below this first water level (W1) regulating of the nominal value of the waste-water discharge is brought to an end and the discharge pipe (13) for the waste-water discharge is shut off and regulating of the nominal value is begun again when the predetermined, second, higher water level (W2) is reached, or in that a time-switch device (32) is provided which in the wake of the start of the regulating of the nominal value of the waste-water discharge serves to stop, in a time controlled manner, the regulating of the waste-water discharge gain, the time control being planned in such a manner that during the regulating of the nominal value of the waste-water discharge the level in the rain tank (10) or sewer pipe (30) cannot fall below a predetermined, first water level (W1) at which the flow measuring-point (33) area of the discharge pipe does still remain full of waste water, this first water level (W1) being however considerably lower than the second water level (W2) ; and that the discharge pipe (13) is shut off again when the regulating of the nominal value of the waste-water discharge is brought to an end and regulating of the nominal value is begun again when the predetermined second water level (W2) is subsequently reached.

Description

Die Erfindung betrifft eine Anlage zur Regelung des durch ein ungedükertes Abflußrohr erfolgenden Abflusses aus einem Regenbecken oder einem Kanalrohr einer Kanalisation gemäß dem Oberbegriff des Anspruches 1.The invention relates to a system for regulating the outflow from a rain basin or a sewer pipe of a sewerage system through an uncapped drain pipe according to the preamble of claim 1.

Ungedükerte Abflußrohre können bei geöffnetem Drosselorgan auch im Bereich der Durchflußmeßstelle ganz oder teilweise leerlaufen, so daß der Durchfluß durch sie bei Trockenwetter sehr klein werden kann.Undamped drain pipes can also run completely or partially empty when the throttle element is open, so that the flow through them can become very small in dry weather.

Bei einer bekannten Anlage dieser Art (DE-A-3009388) ist die Regelung des Nennabflusses normalerweise abgeschaltet und dabei das Drosselorgan in eine vorbestimmte erste Stellung überführt und in dieser gehalten, in der das ungedükerte Abflußrohr für den Durchfluß von Abwasser geöffnet ist, so daß es auch bei Trockenwetter von aus dem Regenbecken oder Kanalrohr abfließendem Abwasser durchströmt werden kann. Wenn die Gefahr des Überschreitens des Nennwertes des Durchflusses des Abflußrohres besteht, wird zuerst volle Füllung des Bereiches der Durchflußmeßstelle des Abflußrohres herbeigeführt und dann die Regelung des Nennabflusses eingeschaltet. Diese Regelung wird wieder beendet, und das Drosselorgan wieder in seine erste Stellung überführt, wenn ein vorbestimmter Waserstand im Regenbecken oder im Kanalrohr unterschritten wird, bei dem der Bereich der Durchflußstelle des Abflußrohres noch voll gefüllt ist. Bei diesem Verfahren kann also das Abflußrohr ganz oder teilweise leerlaufen und von nur noch so kleinen Abwassermengen/Zeit durchflossen werden, daß die Gefahr von stärkeren Ablagerungen von Schlamm, Sand, Fäkalien oder dergl. in dem dem Abflußrohr nachgeschalteten Kanalrohr oder Kanal besteht.In a known system of this type (DE-A-3009388) the regulation of the nominal discharge is normally switched off and the throttle element is transferred to and held in a predetermined first position, in which the undamped drain pipe is open for the flow of waste water, so that even in dry weather, waste water flowing out of the rain basin or sewer pipe can flow through it. If there is a risk of the nominal value of the flow of the drain pipe being exceeded, the area of the flow measuring point of the drain pipe is first filled completely and then the regulation of the nominal drain is switched on. This regulation is ended again, and the throttle body is returned to its first position when the water level in the rain basin or sewer pipe falls below a predetermined level, in which the area of the flow point of the drain pipe is still fully filled. In this method, the drain pipe can be completely or partially empty and only small amounts of waste water / time can flow through it so that there is a risk of greater deposits of sludge, sand, faeces or the like in the sewer pipe or sewer downstream of the drain pipe.

Es ist eine Aufgabe der Erfindung, diese Gefahr von stärkeren Ablagerungen in dem dem Abflußrohr nachgeschlateten Kanalrohr oder Kanal zu verringern.It is an object of the invention to reduce this risk of heavier deposits in the sewer pipe or sewer which has been re-slated after the drain pipe.

Diese Aufgabe wird erfindungsgemäß durch eine Anlage gemäß Anspruch 1 gelöst.This object is achieved according to the invention by a system according to claim 1.

Durch die erfindungsgemäß Anlage wird erreicht, daß das Abflußrohr nur mit ungefähr dem Nennwert des Durchflusses entsprechenden relativ großen Abwassermengen/Zeit durchflossen oder völlig abgesperrt wird. Solange es von diesem relativ großen Nenndurchfluß durchströmt wird, der so vorgesehen ist, daß keine überlastung der nachgeschalteten Kanalisation, Kläranlage oder dergl. auftritt, ist die Gefahr von stärkeren Ablagerungen in dem dem Ablußrohr nachgeschalteten Kanalrohr oder Kanal wegen der relativ hohen Fließgeschwindigkeiten des Abwassers erheblich verringert oder ganz behoben. In den übrigen Zeiten ist das Abflußrohr abgesperrt, so daß aus ihm dann in das ihm nachgeschaltete Kanalrohr bzw. den Kanal überhaupt kein Schlamm, Sand oder sonstige Verunreinigungen mehr gelangen können.The system according to the invention ensures that the drain pipe is only flowed through or completely shut off with relatively large amounts of waste water / time corresponding to the nominal value of the flow. As long as it flows through this relatively large nominal flow, which is provided in such a way that no overloading of the downstream sewage system, sewage treatment plant or the like occurs, the risk of greater deposits in the sewer pipe or sewer downstream of the drain pipe is considerable because of the relatively high flow rates of the waste water reduced or completely eliminated. In the remaining times, the drain pipe is shut off, so that no sludge, sand or other contaminants can get into the sewer pipe or sewer downstream from it.

Da das Abflußrohr an der Durchflußmeßstelle immer voll gefüllt ist, kann der gesamte Durchfluß mittels eines genauen, die Fließgeschwindigkeit fühlenden Durchflußmeßgerätes, vorzugsweise mittels eines magnetischinduktiven Durchflußmeßgerätes genau gemessen werden. Gemäß einer Weiterbildung kann deshalb diese erfindungsgemäß Anlage auch dazu dienen, den gesamten Abwaserabfluß aus dem Regenbecken bzw. dem kanalrohr mengenmäßig zu erfassen, indem die Meßwerte des Durchflußmeßgerätes aufsummiert werden. Dies ist ein wichtiger Vorteil, da es oft erwünscht ist, beispielsweise für Kostenrechnungen, Planungen, statistische Zwecke oder dergl. die in bestimmten Zeiträumen oder insgesamt aus dem Regenbecken oder dergl. abfließende Abwassermenge auch bei Trockenwetter aufzusummieren. Bei der Anlage nach der DE-A-3009388 ist dieses Aufsummieren der Abwassermenge dagegen nicht möglich, weil bei Trockenwetter die Durchflußmeßstelle des ungedükerten Abflußrohres teilweise oder ganz leerläuft und das die Fließgeschwindigkeit des Abwasser fühlende Durchflußmeßgerät dann keine mehr dem Durchfluß entsprechenden Meßwerte lieferen kann.Since the drain pipe at the flow measuring point is always completely full, the total flow can be measured precisely by means of a precise flow measuring device which senses the flow rate, preferably by means of a magnetic inductive flow measuring device. According to a further development, this system according to the invention can therefore also serve to quantify the total waste water discharge from the rain basin or the sewer pipe by adding up the measured values of the flow measuring device. This is an important advantage, since it is often desirable, for example for cost calculations, planning, statistical purposes or the like. To sum up the amount of wastewater flowing out of the rain basin or the like in certain periods or in total even in dry weather. In the system according to DE-A-3009388, however, this accumulation of the amount of waste water is not possible, because in dry weather the flow measuring point of the uncapped drain pipe runs partially or completely empty and the flow meter sensing the flow rate of the waste water can then no longer provide measured values corresponding to the flow.

Durch variable Einstellbarkeit des zweiten Wasserstandes können die Speichermengen an Abwasser, die Sperrzeiten für den Abfluß sowie die Umschaltung zwischen geregeltem und gesperrtem Abfluß der durchschnittlich zufließenden Wassermenge angepaßt und zweckmäßig eingestellt werden.Due to the variable adjustability of the second water level, the storage quantities of waste water, the blocking times for the discharge as well as the switching between regulated and blocked discharge can be adjusted and appropriately adjusted for the average inflowing water quantity.

Durch die Weiterbildung gemäß Anspruch 5 können Ablagerungen von Schmutz vor der Drosselstelle intensiv abgetragen und weggespült werden, falls dies von Zeit zu Zeit erwünscht ist. Dabei ist es meist ausreichend, dieses Wegspülen jeweils nur durch einmaliges, anomales Ausschalten der Regelung bzw. Einschalten der erhöhten Sollwertes der Regelung durchzuführen und nur in längeren Zeitabständen zu wiederholen. Dieses anomale Ausschalten der Regelung ist mit Erhöhung des Abflusses durch geeignet weites Öffnen des Drosselorganes verbunden. Falls der Sollwert der Regelung erhöht wird, bewirkt auch dieses weiteres Öffnen des Drosselorganes. Diese Erhöhung des Abflusses braucht nur so lange durchgeführt zu werden, wie es das jeweilige Abtragen und Wegspülen von Ablagerungen erfordert. Normalerweise findet also der Abfluß des Abwassers unter Regelung des Nennabflusses statt und es kann, nur falls es eforderlich ist, von Zeit zu Zeit vorgesehen sein, den Abfluß vorübergehende unter anomaler Abschaltung der Regelung des Nennwertes oder Erhöhung des Sollwertes der Regelung vorzugsweise nur relativ kurzzeitig stark zu erhöhen zwecks Wegspülens von Schmutz und Schlamm und dgl.. Auch bei dem erhöhten Abfluß ist das Abflußrohr an der Durchflußmeßstelle voll mit Abwasser gefüllt und das Durchflußmeßgerät mißt so den Durchfluß ebenfalls exakt, so daß man im Falle der Aufsummierung der Durchflußmenge auch diesen Abfluß mit erfaßt. Wenn keine Gefahre besteht, daß sich unzulässig starke Ablagerungen vor der Durchflußmeßstelle ansammeln können, braucht die Maßnahme nach Anspruch 5 natürlicht nicht vorgesehen zu werden.Through the development according to claim 5, deposits of dirt in front of the throttle point can be removed intensively and washed away, if this is desired from time to time. In this case, it is usually sufficient to carry out this washing away only by switching off the control once, or switching on the increased setpoint of the control, and only repeating it at longer intervals. This abnormal switching off of the control is associated with an increase in the outflow by suitably opening the throttle body. If the setpoint of the control is increased, this also causes the throttle element to open further. This increase in the discharge only needs to be carried out as long as the removal and flushing away of deposits requires it. Normally, the discharge of the wastewater takes place under regulation of the nominal discharge and it can, if necessary, be provided from time to time, the discharge temporarily with anomalous switching off of the regulation of the nominal value or increasing the setpoint of the regulation, preferably only for a relatively short time to increase in order to flush away dirt and mud and the like. Even with the increased drain, the drain pipe at the flow measuring point is completely filled with waste water and the flow meter also measures the flow exactly, so that in the event of the accumulation of the flow rate this drain is also included detected. If there are no dangers, it becomes impermissibly strong Deposits can accumulate in front of the flow measuring point, the measure according to claim 5 need not be provided naturally.

Die Erfindung ermöglicht also auch Erfassung der gesamten Durchflussmenge durch das Abflußrohr durch Aufsummierung des Durchflußes. Diese Aufsummierung kann in einem Integrator oder einem sonstigen Zähler erfolgen. Die aufsummierte Abwassermenge kann bspw. angezeigt und/oder registriert werden. Die Anzeige bzw. Registrierung kann bspw. in Kubikmeter erfolgen. Dieser Integrator oder dergl. bildet also einen Abwasserzähler.The invention thus also enables the total flow through the drain pipe to be recorded by summing up the flow. This summation can take place in an integrator or another counter. The total amount of wastewater can be displayed and / or registered, for example. The display or registration can be done, for example, in cubic meters. This integrator or the like. So forms a wastewater meter.

In der Zeichnung sind Ausführungsbeispiele der Erfindung dargestellt. Es zeigen:

  • Fig. 1 in schematischer Schnittdarstellung ein Regenbecken mit Zulaufkanal und Abflußrohr gemäß einem ersten Ausführungsbeispiel der Erfindung in ausschnittsweiser Darstellung,
  • Fig. 2 in schematischer Schnittdarstellung ein Kanalrohr einer Kanalisation mit Abflußrohr in ausschnittweiser Darstellung,
  • Fig. 3 in schematischer Schnittdarstellung ein Regenbecken mit Zulaufkanal und Abflußrohr gemäß einem weiteren Ausführungsbeispiel der Erfindung in ausschnittsweiser Darstellung.
Exemplary embodiments of the invention are shown in the drawing. Show it:
  • 1 is a schematic sectional view of a rain basin with inlet channel and drain pipe according to a first embodiment of the invention in a sectional view,
  • 2 is a schematic sectional view of a sewer pipe of a sewage system with a drain pipe in a sectional view,
  • Fig. 3 in a schematic sectional view of a rain basin with inlet channel and drain pipe according to another embodiment of the invention in a sectional view.

An das in Fig. 1 dargestellte Regenbecken 10 sind ein Zulaufkanal 11 sowie ein gerades, nahezu horizontal verlegtes ungedükertes Abflußrohr 13 angeschlossen, das einen trockenen Schieberschacht 12 durchdringt. Dieses Abflußrohr 13 ist mittels eines durch ein Stellglied 16 verstellbaren Drosselorgans 14 variabel drosselbar und absperrbar. Dabei kann das Stellglied 16 als Stellmotör, beispielsweise als Elektromotor oder elektromagnetisches Stellglied, oder als hydraulischer oder pneumatischer Hubzylinder oder dergl. ausgebildet sein, der auf das als Schieber oder schwenkbare Drosselklappe ausgebildete Drosselorgan 14 einwirkt. Stromaufwärts des Drosselorgans 14 ist am Abflußrohr ein Durchflußmeßgerät 21 angeordnet, welches bei im Bereich der Durchflußmeßstelle 33 voll gefülltem Abflußrohr 13 die durchströmende Wassermenge/Zeit (=Durchfluß) durch Fühlen der Fließgeschwindigkeit messen kann. Dieses Durchflußmeßgerät 21 kann vorzugsweise ein die Strömungsgeschwindigkeit messendes induktives Durchflußmeßgerät oder ein Ultraschallmeßgerät, jedoch gegebenenfalls auch ein anderes geeignetes Meßgerät sein. Weiterhin sind im Abflußrohr 13 zwei als Druckschalter 24, 25 ausgebildete Wasserstandsfühler angeordnet, die zur Erfassungs zweier vorbestimmter Wasserstände W1 und W2 im Regenbecken 10 dienen. Der niedrigere vorbestimmte Waserstand W1 ist so vorgesehen, daß bei ihm zum einen das Abflußrohr 13 im Bereich der Durchflußmeßstelle 33 voll gefüllt ist, so daß das Meßgerät 21 den Durchfluß genau messen kann und zum anderen durch ihn zumindest der dem Nennwert des Durchflusses entsprechende Durchfluß durch das Abflußrohr bewirkt werden kann, vorzugsweise ein bei voll geöffnetem Drosselorgan 14 noch erheblich grösserer Durchfluß.At the rain basin 10 shown in Fig. 1, an inlet channel 11 and a straight, almost horizontally laid undressed drain pipe 13 are connected, which penetrates a dry slide shaft 12. This drain pipe 13 can be variably throttled and blocked by means of a throttle member 14 adjustable by an actuator 16. The actuator 16 can be designed as an actuator, for example as an electric motor or electromagnetic actuator, or as a hydraulic or pneumatic lifting cylinder or the like, which acts on the throttle member 14 designed as a slide or pivotable throttle valve. Upstream of the throttle element 14, a flow meter 21 is arranged on the drain pipe, which can measure the flowing water quantity / time (= flow) by sensing the flow velocity when the drain pipe 13 is completely filled in the area of the flow measuring point 33. This flow measuring device 21 can preferably be an inductive flow measuring device measuring the flow rate or an ultrasonic measuring device, but possibly also another suitable measuring device. Furthermore, two water level sensors designed as pressure switches 24, 25 are arranged in the drain pipe 13 and are used to detect two predetermined water levels W1 and W2 in the rain basin 10. The lower predetermined water level W1 is provided so that, on the one hand, the drain pipe 13 in the area of the flow measuring point 33 is full, so that the measuring device 21 can measure the flow precisely and, on the other hand, through it the flow rate corresponding to the nominal value of the flow rate the drain pipe can be effected, preferably a significantly larger flow when the throttle member 14 is fully open.

Das Ausgangssignal des Durchflußmeßgerätes 21 wird als Istwert dem Istwert-Eingang eines Reglers 23 aufgeschaltet, an dessen Sollwert-Eingang der mittels eines Sollwertstellers 22 einstellbare Sollwert des Nennabflusses des Regenbeckens 10 eingegeben wird. Der Regler 23 bildet die Differenz zwischen diesem Sollwert und dem gemessenen Istwert als Regelabweichung und erzeugt in Abhängigkeit davon Schaltsignale, die zur Ausregelung der jeweiligen Regelabweichung über das Stellglied 16 und das Drosselorgan 14 den wirksamen Querschnitt an der Drosselstelle vergrößern und verkleinern oder bei Abschaltung der Regelung den Abfluß ganz sperren. Der Regler 23 ist über ein bistabiles Schaltglied 26 ein- und ausschaltbar, wobei der Druckschalter 24 mit dessen Setzeingang S und der Druckschalter 25 mit dessen Rücksetzeingang R verbunden ist.The output signal of the flow measuring device 21 is applied as an actual value to the actual value input of a controller 23, at the setpoint input of which the nominal value of the nominal outflow of the rainbow 10, which can be set by means of a setpoint adjuster 22, is entered. The controller 23 forms the difference between this setpoint and the measured actual value as a control deviation and, depending on this, generates switching signals which enlarge and reduce the effective cross-section at the throttle point for adjusting the respective control deviation via the actuator 16 and the throttle element 14 or when the control is switched off completely block the drain. The controller 23 can be switched on and off via a bistable switching element 26, the pressure switch 24 being connected to its set input S and the pressure switch 25 being connected to its reset input R.

Die Baugruppen 22, 23, 26 sind in einem elektronischen Regel- und Steuergerät 27 enthalten, das vorzugsweise Teil eines Mikroprozessors sein kann.The assemblies 22, 23, 26 are contained in an electronic regulating and control device 27, which can preferably be part of a microprocessor.

Ein die beispielsweise als Signalfolge mit einer durchflußabhängigen Frequenz vorliegenden Meßsignale des Durchflußmeßgerätes 21 aufsummierender Integrator 28, den man auch als Abwassermengenzähler bezeichnen kann, dient der Erfassung der durch das Abflußrohr 13 insgesamt abgeflossenen Abwassermenge. Das Aufsummieren des Meßsignales kann auch im Gerät 27 durchgeführt und der sich ergebende Zahlenwert registriert und/oder angezeigt werden. Bspw. kann die Ablesung des Zählers oder Integrators 28 zu gewünschten Zeitpunkten erfolgen und die Differenz zwischen den zu zwei unterschiedlichen Zeitpunkten abgelesenen Zahlenwerten ergibt dann die im betreffenden Zeitraum durch das Abflußrohr 13 insgesamt durchgeflossene Abwassermenge. Es kann auch vorgesehen sein, daß man den Zähler oder Integrator 28 nur zeitweise einsetzt, wenn Aufsummierung des Durchflusses durchgeführt werden soll.An integrator 28 summing up the measuring signals of the flow measuring device 21, which are present, for example, as a signal sequence with a flow-dependent frequency, and which can also be referred to as a wastewater quantity counter, is used to record the total wastewater flow rate through the drain pipe 13. The summation of the measurement signal can also be carried out in the device 27 and the resulting numerical value can be registered and / or displayed. E.g. the meter or integrator 28 can be read at the desired times and the difference between the numerical values read at two different times then gives the total amount of wastewater through the drain pipe 13 in the relevant period. Provision can also be made for the counter or integrator 28 to be used only temporarily if the flow rate is to be totalized.

Die Arbeitsweise der beschriebenen Anlage soll im folgenden näher beschrieben werden.The operation of the system described will be described in more detail below.

Es sei angenommen, daß der Wasserstand im Regenbecken 10 über dem ersten Wasserstand W1, bei dem der Druckschalter 24 anspricht, liegt und der Regler 23 beim vorangegangenen Erreichen des zweiten Wasserstandes W2 durch den Druckschalter 25 eingeschaltet worden ist. Der Regler 23 regelt dann über das Drosselorgan 14 den vom abfließenden Abwasser bewirkten Durchfluß des Abflußrohres 13 auf den durch den Sollwertsteller 22 vorgegebenen Nennwert. Sinkt der Wasserstand infolge des Aflußes auf den Wert W1 ab, so erzeugt der Druckschalter 24 ein Setzsignal für das bistabile Schaltglied 26, das hierdurch den Regler 23 abschaltet, wodurch auch das Stellglied 15 zum sofortigen Absperren des Abflußrohres 13 mittels des Drosselorgans 14 angesteuert wird. Damit findet jetzt kein Abfluß von Abwasser mehr statt. Der Abfluß wird erst wieder durch das . nächste Einschalten des Reglers 26 aufgenommen. Das Abschalten des Reglers 23 kann beispielsweise durch Setzen des Sollwerts auf den Wert Null erfolgen. Wegen der Absperrung des Abflußrohrs 13 steigt der Wasserstand im Regenbecken 10 wieder an. Er kann auf diese Weise nie den Wert W1 wesentlich unterschreiten, so daß das Abflußrohr 13 an der Durchflußmeßstelle immer mit Abwasser voll gefüllt ist und dies trotzdem es an sich bei geöffnetem Drosselorgan 14 auch im Bereich der Durchflußmeßstelle 33 ganz oder teilweise leerlaufen könnte, was jedoch durch die beschriebene Steuerung verhindert wird. Erreicht der Wasserstand bei abgeschaltetem Regler 23 den höheren Wert W2 (2. Wasserstand) wieder, der beispielsweise einen Meter über W1 liegt, so spricht der zweite Druckschalter 25 an und erzeugt eine Rücksetzsignal für das bistabile Schaltglied 26. Der Regler 23 wird dadurch wieder eingeschaltet und regelt über das Drosselorgan 14 jetzt wieder den Abfluß des Abwassers auf den Nennwert des Durchflusses des Abflußrohres 13. Der Wasserstand sinkt früher oder später wieder bis zum Unterschreiten des Wertes W1 ab, und es wiederholt sich dann das Absperren des Abflußrohres 13 und Ausschalten des Reglers 23.It is assumed that the water level in the rain basin 10 is above the first water level W1, at which the pressure switch 24 responds, and the controller 23 has been switched on by the pressure switch 25 when the second water level W2 has been reached previously. The controller 23 then regulates, via the throttle element 14, the flow of the drain pipe 13 caused by the flowing waste water to the nominal value specified by the set point adjuster 22. If the water level drops to the value W1 as a result of the inflow, the pressure switch 24 generates a set signal for the bistable switching element 26, which thereby switches off the controller 23, as a result of which the actuator 15 is activated by means of the throttle element 14 to immediately shut off the drain pipe 13. This means that there is no longer any waste water runoff. The drain is only through the. next time the controller 26 is switched on. The controller 23 can be switched off, for example, by setting the setpoint to the value zero. Because of the shutoff of the drain pipe 13, the water level in the rain basin 10 rises again. In this way, he can never significantly fall below the value W1, so that the drain pipe 13 at the flow measuring point is always completely filled with wastewater and this, in spite of itself, could be completely or partially empty when the throttle element 14 is open, also in the area of the flow measuring point 33, which, however is prevented by the control described. If the water level reaches the higher value W2 (2nd water level) when the controller 23 is switched off, which is, for example, one meter above W1, the second pressure switch 25 responds and generates a reset signal for the bistable switching element 26. The controller 23 is thereby switched on again and now regulates the discharge of the waste water to the nominal value of the flow of the drain pipe 13 again via the throttle element 14. The water level drops again sooner or later until the value falls below the value W1, and then the shut-off of the drain pipe 13 and the controller being switched off are repeated 23.

Die Ansprechschwelle des zweiten Druckschalters 25 ist zweckmäßig einstellbar ausgebildet, so daß der Wasserpegel W2 zweckmäßig eingestellte werden kann. Eine weitere Einstellbarkeit ergibt sich durch Variation des Sollwertes durch den Sollwertsteller 22 oder durch anomale Abschaltung des Reglers 23 unter bspw. voller Öffnung des Drosselorganes 14, um eine über dem Nennwert liegende Abflußmenge zum Fortspülen von Ablagerungen vor der Drosselstelle 14 von Zeit zu Zeit zu erreichen. Diese anomale Abschaltung des Reglers 23 bzw. Erhöhung seines Sollwertes kann während der Gesamtzeit eines Absinkens des Wasserspiegels von W2 auf W1 oder auch durch kürzeres, stärkeres, vorzugsweise maximales Öffnen des Drosselorganes 14 erfolgen. Diese Abschaltung der Regelung oder Erhöhung des Sollwertes zwecks Erhöhung des Abflusses kann bspw. bei Bedarf manuell oder programmiert, bspw. bei oder nach jeder n-ten Regelung des Nennabflusses, wo n bspw. 10 bis 50 betragen kann, oder in sonstigen geeigenten längeren Zeitabständen erfolgen, falls es überhaupt notwendig ist.The response threshold of the second pressure switch 25 is expediently adjustable, so that the water level W2 can be expediently set. A further adjustability results from variation of the setpoint by the setpoint adjuster 22 or by abnormal switching off of the controller 23, for example with the throttle member 14 fully open, in order to achieve a discharge amount above the nominal value from time to time for flushing away deposits in front of the throttle point 14 . This abnormal shutdown of the controller 23 or increase of its setpoint can take place during the total time the water level drops from W2 to W1 or also by a shorter, stronger, preferably maximum opening of the throttle element 14. This switching off of the control or increasing the setpoint in order to increase the outflow can, for example, be done manually or programmed, for example with or after every nth control of the nominal outflow, where n can be, for example, 10 to 50, or in other suitable longer time intervals if it is necessary at all.

An das in Fig. 2 dargestellte, in einem Schieberschacht 12 gemäß Fig. 1 angeordnete Abflußrohr 13 ist anstelle eines Regenbeckens 10 ein mit Gefälle verlegtes Kanalrohr 30 angeschlossen. Zur Vereinfachung der Fig. 2 sind einzelne Baugruppen im Schieberschacht 12 nicht nochmals dargestellt.A sewer pipe 30 laid with a slope is connected to the drain pipe 13 shown in FIG. 2 and arranged in a slide shaft 12 according to FIG. 1 instead of a rain basin 10. To simplify FIG. 2, individual assemblies in the slide shaft 12 are not shown again.

Die Arbeitsweise des in Fig. 2 dargestellten Ausführungsbeispieles kann dem zuvor beschriebenen Ausführungsbeispiel entsprechen. Bei geschlossenem Drosselorgan 14 steigt der Wasserstand hier im Kanalrohr 30 an.The mode of operation of the exemplary embodiment shown in FIG. 2 can correspond to the previously described exemplary embodiment. When the throttle element 14 is closed, the water level in the sewer pipe 30 rises here.

Es sei noch erwähnt, daß die Regelung des Nennwertes des Abflusses auch dann stafffindet, wenn nach Erreichen des zweiten Wasserstandes W2, durch das der Regler 23, eingeschaltet wurde, dieser zweite Wasserstand W2 ein- oder mehrmals überschritten wird, bevor es durch Unterschreiten des ersten Waserstandes W1 wieder zum Abschalten des Reglers und Schließen des Drosselorganes 14 bis zum nächsten Erreichen des zweiten Wasserstandes W2 kommt.It should also be mentioned that the regulation of the nominal value of the drain also takes place if, after reaching the second water level W2, by which the controller 23 was switched on, this second water level W2 is exceeded one or more times before it falls below the first Water level W1 comes back to switching off the controller and closing the throttle element 14 until the second water level W2 is reached again.

Die in Fig. 3 dargestellte Anlage unterscheidet sich von der nach Fig. 1 im wesentlich dadurch, daß der Wasserstandsfühler 24 zum Fühlen des ersten Wasserstandes W1 im Regenbecken 10 in Fortfall gekommen ist und an seiner Stelle eine Zeitschaltvorrichtung 32 vorgesehen ist. Diese Zeitschaltvorrichtung 32 wird durch den auf den zweiten Wasserstand W2 ansprechenden Druckfühler 25 jeweils gleichzeitig mit dem der Regelung des Nennwertes des Durchflusses durch das Abflußrohr 13 dienenden Regler 23 eingeschaltet und mißt dann eine vorgestimmte Zeitspanne ab, bspw. 10 min bis 1 h, die so bemessen ist, daß auch bei fehlender Zufuhr von Abwasser zu dem Regenbecken 10 durch die Regelung des Nennwertes des Durchflusses des Abflußrohres 13 ein vorbestimmter erster Wasserstand W1 im Regenbecken nicht unterschritten werden kann. Dieser in diesem Fall jedoch nicht gefühlte erste Wasserstand W1 ist erheblich niedriger als der Wasserstand W2, jedoch immer noch so groß, daß bei ihm die Durchflußmeßstelle 33 des Abflußrohres 13, also sein lichter Querschnitt im Bereich der Durchflußmeßstelle 33 hoch voll mit Abwasser gefüllt ist. Dieser der Festlegung der von der Zeitschaltvorrichtung 32 abzumessenden Zeitspanne mit zugrundeliegende erste Wasserstand W1 kann beispielsweise wie der Wasserstand W1 der Anlage nach Fig. 1 der lichten Scheithöhe des in diesem Ausführungsbeispiel horizontal liegenden geraden Abflußrohres 13 entsprechen oder etwas darüber liegen. Mit Ablauf der von der Zeitschaltvorrichtung 32 seit Beginn der Regelung des Nennwertes abgemessenen Zeitspanne wird die Regelung des Nennwertes beendet und das Drosselorgan 14 wird dann mittels des durch das Schaltglied 26 angesteuerten Stellgliedes 16 in seine Absperrstellung überführt und verbleibt in dieser so lange, bis der Wasserstand wieder auf den Wert W2 angestiegen ist, da dann wieder der Regler 23 zur Regelung des Durchflusses auf den Nennwert eingeschaltet wird. Auch bei dieser Anlage nach Fig. 3 wird also das Abflußrohr 13, wenn es nicht abgesperrt ist, bei voller Füllung der Durchflußmeßstelle 33 entsprechend dem Nennwert des Durchflusses von Abwasser durchströmt und dies ergibt genaue Messung des Durchflusses und damit genaue Aufsummierung des gesamten Durchflusses durch das Abflußrohr 13 und seine Anzeige am Zähler 28, falls diese Aufsummierung vorgesehen bzw. eingeschaltet ist.The system shown in FIG. 3 differs from that of FIG. 1 essentially in that the water level sensor 24 for sensing the first water level W1 in the rain basin 10 has ceased to exist and a timer 32 is provided in its place. This timer 32 is activated by the pressure sensor 25, which responds to the second water level W2, at the same time as the controller 23 serving to regulate the nominal value of the flow through the drain pipe 13, and then measures a predetermined period of time, for example 10 minutes to 1 hour, in this way It is dimensioned that even if there is no supply of waste water to the rain basin 10, by regulating the nominal value of the flow of the drain pipe 13, a predetermined first water level W1 in the rain basin cannot be undershot. This first water level W1, which is not felt in this case, is considerably lower than the water level W2, but is still so large that the flow measuring point 33 of the drain pipe 13, that is to say its clear cross section in the area of the flow measuring point 33, is filled with waste water. This determination of the time period to be measured by the time switching device 32, with the first water level W1 on which it is based, can correspond, for example, like the water level W1 of the system according to FIG. When the period of time measured by the time switching device 32 since the start of the regulation of the nominal value has elapsed, the regulation of the nominal value is ended and the throttle element 14 is then brought into its shut-off position by means of the actuator 16 controlled by the switching element 26 and remains in this position until the water level has risen again to the value W2, since the controller 23 is then switched on again to regulate the flow to the nominal value. 3 so the drain pipe 13, if it is not shut off, with full filling of the flow measuring point 33 flows through according to the nominal value of the flow of wastewater and this results in accurate measurement of the flow and thus exact totaling of the total flow through the Drain pipe 13 and its display on the counter 28 if this summation is provided or switched on.

Wenn bei Ablauf der von der Zeitschaltvorrichtung 32 abgemessenen Zeitspanne der Wasserstand im Regenbecken 10 nicht unter dem Wert W2 liegt, sondern bspw. infolge eines Wolkenbruches über ihm, dann hat dies zur Folge, daß der Druckschalter 25 mit Ablauf der von der Zeitschaltvorrichtung 32 ab Beginn der Regelung des Nennwertes abgemessenen Zeit sofortige Wiedereinschaltung der Zeitschaltvorrichtung 32 und des Reglers 23 auslöst un damit auch das Abflußrohr 13 nicht abgesperrt wird, sondern der Nennwert des Durchflüßes erneut über die von der Zeitschaltvorrichtung erneut abgemessene Zeit hinweg geregelt wird. Dies kann sich selbstverstandlich bei starkem Regenanfall noch weiterhin wiederholen.If at the end of the time period measured by the timer 32, the water level in the rain basin 10 is not below the value W2 lies above it, for example as a result of a cloudburst, this has the consequence that the pressure switch 25 triggers instantaneous reclosure of the time switch device 32 and the controller 23 when the time measured by the time switch device 32 from the start of regulation of the nominal value has elapsed and thus also the drain pipe 13 is not shut off, but the nominal value of the flow is regulated again over the time measured again by the time switching device. Of course, this can still be repeated in heavy rainfall.

Es kann auch vorgesehen sein, daß die Zeitschaltvorrichtung 32 beim Anstieg des Wasserstandes in Regenbecken 10 (bzw. im Kanalrohr 30) nicht gleichzeitig mit dem Regler 23 eingeschaltet wird, sondern erst dann, wenn der Druckschalter 25 signalisiert, daß der Wasserstand im Regenbecken 10 oder Kanalrohr 30 wieder unter den zweiten Wasserstand W2 abgesunken ist. Man kann dabei auch vorsehen, daß, falls dann noch vor Ablauf der in Messung befindlichen Zeitspanne der Wasserstand im Regenbecken 10 bzw. im Kanalrohr 30 wieder den Wasserstand W2 wegen eines neuen Regenereignisses erreicht, dann die Zeitschaltvorrichtung 32 wieder abgeschaltet und damit auf Null zurückgesetzt wird und erst wieder eingeschaltet wird, wenn erneut der zweite Wasserstand W2 unterschritten wird.It can also be provided that the timer 32 when the water level in the rain basin 10 (or in the sewer pipe 30) is not switched on simultaneously with the controller 23, but only when the pressure switch 25 signals that the water level in the rain basin 10 or Sewer pipe 30 has dropped below the second water level W2. It can also be provided that if the water level in the rain basin 10 or in the sewer pipe 30 again reaches the water level W2 due to a new rain event before the expiry of the time period under measurement, the timer 32 is then switched off again and is thus reset to zero and is only switched on again when the water level falls below the second level W2 again.

Man kann also besonders zweckmäßig die Zeitsteuerung so vorsehen, daß die Regelung des Nennwertes des Durchflusses des Abflußrohres 13 dann oder spätestens dann beendet wird, wenn die von der Zeitschaltvorrichtung 32 abzumessende Zeitspanne ab Beginn des letzten Unterschreitens des zweiten Wasserstandes W2 abgemessen wird und bis zum Ende dieser Zeitspanne der zweite Wasserstand nicht mehr erreicht worden ist.It is therefore particularly expedient to provide the time control in such a way that the regulation of the nominal value of the flow of the drain pipe 13 is ended or at the latest when the time period to be measured by the time switching device 32 is measured from the beginning of the last drop below the second water level W2 and to the end the second water level has not been reached during this period.

Claims (7)

1. An installation for regulating the discharge through a discharge pipe, which is without siphons, of waste water from a rain tank (10) or a sewer pipe (30) of a waste-water sewer system, having a regulator (23) for temporarily regulating, at a predetermined nominal value, by means of a throttling member (14) associated with the discharge pipe and displaceable by means of an adjusting member, the through-flow through the discharge pipe (13), the actual value of the through-flow being measured with the discharge pipe (13) full of waste water in the area of the flow measuring-point located upstream of the throttling member (14) and by means of a flowmeter sensing the flow speed of the waste water in the discharge pipe (13), and furthermore there being provided a second water-level sensor (25) for sensing a predetermined, second water level (W2) at which the discharge pipe (13) is full of water in the area of the flow measuring-point and, the regulator (23) being put into operation to regulate the nominal value of the waste-water discharge if, by means of a rise in the water-level in the rain tank (10) or sewer pipe (30), the second water level is reached, characterized in that the discharge pipe (13) is normally shut off by means of the throttling member (14), and
in that there is provided either a first water-level sensor (24) for sensing a predetermined first water level (W1) at which, although lower than the second water level, the discharge pipe (13) remains full of waste water in the area of the flow measuring-point (33), and when there is a fall below this first water level (W1) regulating of the nominal value of the waste-water discharge is brought to an end and the discharge pipe (13) for the waste-water discharge is shut off and regulating of the nominal value is begun again when the predetermined, second, higher water level (W2) is reached,
or in that a time-switch device (32) is provided which in the wake of the start of the regulating of the nominal value of the waste-water discharge serves to stop, in a time controlled manner, the regulating of the waste-water discharge gain, the time control being planned in such a manner that during the regulating of the nominal value of the waste-water discharge the level in the rain tank (10) or sewer pipe (30) cannot fall below a predetermined, first water level (W1) at which the flow measuring-point (33) area of the discharge pipe does still remain full of waste water, this first water level (W1) being however considerably lower than the second water level (W2); and that the discharge pipe (13) is shut off again when the regulating of the nominal value of the waste-water discharge is brought to an end and regulating of the nominal value is begun again when the predetermined second water level (W2) is subsequently reached.
2. An installation in accordance with Claim 1, characterized in that the time-switch device (32) is designed in such a manner that it starts to count down a predetermined period of time at the same time as the start of the regulating of the nominal value of the waste-water discharge or from when there is a fall below the second water level (W2), and in that when this period of time has expired the regulating of the nominal value is then at least stopped if the water level in the rain tank (10) or sewer pipe (30) does not rise to the second water level (W2) again during this time count-down, if however the water level in the rain tank (10) or sewer pipe (30) rises to the second water level (W2) during this time count-down, the regulating of the nominal value is continued, preferably with the time count-down restarting, at least until there is a fall below the second water level (W2) again.
3. An installation in accordance with Claim 1 or 2, characterized in that the second water level (W2) is variably ajustable.
4. An installation in accordance with any one of the preceding Claims, characterized in that for the first water level (W1) approixmately corresponds to the maximum height of the clear interior-space of the discharge pipe (13) in the area of the flow measuring-point (33).
5. An installation in accordance with any one of the preceding Claims, characterized in that for the purpose of increasing the waste-water discharge for washing away deposits, the regulating of the nominal value of the waste-water discharge can, in such a way that the waste-water flow is raised greatly above the nominal value and preferably by programming, be temporarily, abnormally stopped or changed over to a desired value to be regulated which is considerably higher than the nominal value.
6. An installation in accordance with any one of the preceding Claims, characterized in that a waste-water meter (28) adding up the measured values of the flow measuring-apparatus (21) is connected to the latter.
7. An installation in accordance with any one of the preceding Claims, characterized in that the regulator (23) is part of a microprocessor.
EP86107051A 1985-05-25 1986-05-23 Device for regulating the spill of water from a rain reservoir or a canal duct Expired - Lifetime EP0205013B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86107051T ATE52119T1 (en) 1985-05-25 1986-05-23 SYSTEM FOR CONTROLLING WATER OUTLET FROM A RAIN TANK OR SEWER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3518943 1985-05-25
DE3518943 1985-05-25

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EP0205013A2 EP0205013A2 (en) 1986-12-17
EP0205013A3 EP0205013A3 (en) 1987-07-22
EP0205013B1 true EP0205013B1 (en) 1990-04-18

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DE (1) DE3670520D1 (en)

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FR1498527A (en) * 1966-08-11 1967-10-20 Union Tank Car Co Improvements to wastewater treatment devices
US3633597A (en) * 1970-05-28 1972-01-11 Atomic Energy Commission Flow rate control method
IT1108926B (en) * 1978-10-19 1985-12-16 Zanussi A Spa Industrie WATER LOAD CONTROL DEVICE IN A WASHING MACHINE, IN PARTICULAR FOR DOMESTIC USE
DE2944733A1 (en) * 1979-11-06 1981-05-14 Fa. Oskar Vollmar, 7000 Stuttgart Metering system for water from rain basin - uses motor to set throttle controlling flow in outflow pipe
DE3009388A1 (en) * 1980-03-12 1981-09-24 Fa. Oskar Vollmar, 7000 Stuttgart Level detector for drainage water discharge control system - has membrane acted on by pressure corresp. to water level to operate switch
JPS59201117A (en) * 1983-04-28 1984-11-14 Fujitsu Ltd Water level control system

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EP0205013A3 (en) 1987-07-22
ATE52119T1 (en) 1990-05-15
DE3670520D1 (en) 1990-05-23
EP0205013A2 (en) 1986-12-17

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