EP2098657B1 - Roof drainage device - Google Patents

Roof drainage device Download PDF

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Publication number
EP2098657B1
EP2098657B1 EP20090002953 EP09002953A EP2098657B1 EP 2098657 B1 EP2098657 B1 EP 2098657B1 EP 20090002953 EP20090002953 EP 20090002953 EP 09002953 A EP09002953 A EP 09002953A EP 2098657 B1 EP2098657 B1 EP 2098657B1
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EP
European Patent Office
Prior art keywords
roof
emergency
drainage
main
brim
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EP20090002953
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German (de)
French (fr)
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EP2098657A2 (en
EP2098657A3 (en
Inventor
Wolfgang Dipl.-Ing. Vahlbrauk
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
    • E04D13/04—Roof drainage; Drainage fittings in flat roofs, balconies or the like
    • E04D13/0404—Drainage on the roof surface
    • E04D13/0409—Drainage outlets, e.g. gullies
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
    • E04D13/04—Roof drainage; Drainage fittings in flat roofs, balconies or the like
    • E04D13/0404—Drainage on the roof surface
    • E04D13/0409—Drainage outlets, e.g. gullies
    • E04D2013/0422—Drainage outlets, e.g. gullies for draining water above the roof level, e.g. gullies with overflow ports
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
    • E04D13/04—Roof drainage; Drainage fittings in flat roofs, balconies or the like
    • E04D13/0404—Drainage on the roof surface
    • E04D13/0409—Drainage outlets, e.g. gullies
    • E04D2013/0427—Drainage outlets, e.g. gullies with means for controlling the flow in the outlet

Definitions

  • the invention relates to a roof drainage device for removing water from a roof according to the preamble of claim 1.
  • Such a roof drainage device is known from DE 10 2005 012 439 and the DE 10 2005 012 438 known.
  • a disadvantage of such roof drainage devices is that the main drain pipe must be easily contaminated and often cleaned if the full drainage performance is to be maintained.
  • the EP 1 013 843 A1 describes a free-standing water drain for a flat roof, with a drain opening, which is formed by a flat ring mounted on the flat roof flange, which connected at its inner diameter via a curvature having cylindrical approach, so that there is a high drainage performance.
  • a grid cage may be attached as a gravel trap.
  • the DE 2004 024 904 A1 discloses a roof drain having an annular plate portion as drainage surface and a central bowl portion with a central drainage opening. Above the drain opening a cover plate is further attached, which is provided in its outer region with a ring slot and on the upper side in the radial direction arranged lamellae are provided for flow guidance.
  • the invention has for its object to provide a roof drainage device, which has a lower risk of clogging.
  • the invention solves the problem by a generic roof drainage device according to claim 1.
  • This roof drainage device is that the water when it is approximately at the height of the emergency drainage height on the roof, forms a pressure flow in the main drain pipe. This creates a high flow velocity, which entrains any dirt. If the main drainpipe becomes dirty, the water also rises higher on the roof on average, which increases the likelihood that a pressure flow will develop. In other words, there is a negative feedback in which occurs when contamination of the main drain pipe rather a cleaning. This gives a substantially maintenance-free roof drainage device.
  • the brim By the brim it is achieved that at a water level which corresponds approximately to the Notablaufière, also forms a pressure flow in the main drain pipe, which significantly increases the discharge capacity of the main drain pipe. As a result, the total dissipation of the roof drainage device increases.
  • the brim is thus arranged so that, when water is present above the Notablaufière, forms a pressure flow in the main drain pipe. This means that a water column substantially free of large air bubbles forms in the main drain pipe, so that a negative pressure is applied below the brim.
  • the cross section of the brim is at least as large as the mouth opening, it is to be understood in particular that the brim completely covers the mouth opening. If, for example, the brim and the mouth opening are both bounded in a circular manner and arranged concentrically one above the other, the rim diameter is at least as large as the mouth diameter.
  • the main inlet device has a main inlet surface, which passes through an inlet opening boundary in the mouth opening of the main drain pipe, wherein the brim in vertical projection completely spans the inlet opening boundary.
  • Under the inlet opening boundary is understood in particular the transition from the horizontally extending main inlet surface to the inclined to the horizontal main drain pipe.
  • the vertical projection of the brim encloses the mouth opening, more specifically the mouth opening boundary.
  • the main drain pipe merges upward from a cylinder jacket-shaped pipe section into a truncated cone-like widened pipe section whose upper end forms the mouth opening.
  • a main drain pipe cross-sectional area of the main drain pipe is larger than an emergency drain cross-sectional area of the emergency drain pipe.
  • the main drain pipe cross-sectional area is at least twice as large as the emergency drain pipe cross-sectional area.
  • the brim forms an emergency inlet surface of the emergency inlet device, which terminates flush with the emergency drainage pipe.
  • the brim has two functions that complement each other.
  • the emergency inlet device comprises an airtight lid which forms a downwardly open and otherwise airtight cavity and is disposed above the brim, the lid having a lid diameter smaller than a brim diameter of the brim
  • the emergency inlet device comprises an airtight lid which forms a downwardly open and otherwise airtight cavity and is disposed above the brim, the lid having a lid diameter smaller than a brim diameter of the brim
  • the emergency inlet device comprises an airtight lid which forms a downwardly open and otherwise airtight cavity and is disposed above the brim, the lid having a lid diameter smaller than a brim diameter of the brim
  • the Englishmesseer of the mouth opening is smaller than the cover diameter and this in turn smaller than the Krempen pressmesser, It thus results in a particularly compact roof drainage device, which has a particularly low noise at all possible water heights.
  • the brim in the installation position of the roof drainage device is substantially horizontal.
  • the brim does not have to be horizontal in the strict mathematical sense, but small deviations of, for example, less than 5 ° are tolerable.
  • the brim can have the shape of a flat disc. In this way, noises are suppressed particularly effectively.
  • the brim can also be convex and thus form a downwardly open, airtight cavity.
  • a particularly easy to produce roof drainage device results when the emergency drain pipe is cylindrical.
  • a further advantage is that a cylindrical emergency drainage pipe builds up a pressure flow particularly effectively, so that dewatering of the roof is always possible in an efficient manner.
  • the roof drainage device has at least one outer guide element for reducing or suppressing a radial flow in water entering the main inlet device and / or the emergency inlet device.
  • the roof drainage device has at least one outer guide element for reducing or suppressing a radial flow in water entering the main inlet device and / or the emergency inlet device.
  • two, three or a plurality of guide elements can be provided, which are preferably arranged in the same angular increments.
  • the guide elements may be baffles, for example.
  • the brim has a radially outer, in the installed position substantially horizontally extending outer portion and a radially inwardly on the outer portion attached, the outer portion angled extending inner portion.
  • a pressure flow in the main drain pipe is formed very quickly.
  • This brim is particularly easy to manufacture, if the inner section has a widening section which essentially adjoins the emergency drain pipe and which extends essentially horizontally in the installed position, and a vertical section which adjoins the widening section and which extends substantially vertically in the installed position.
  • the emergency inlet device comprises an airtight lid, which is arranged below the brim and has a lid diameter which is greater than the rim diameter of the brim.
  • the roof drainage device comprises a dirt retention device, which is designed so that both such coarse dirt contained in the water, which runs in the main drain pipe, as well as such coarse dirt is contained, which is contained in water, which in the emergency drain pipe is running.
  • the dirt retention device is designed to retain coarse dirt from all water, which enters one of the two processes. It may be, for example, a grid or a rake. The advantage of this is that when a pressure flow forms in the main drain pipe, the dirt retention device is cleaned. Separate cleaning of the dirt retention device is therefore largely unnecessary.
  • Coarse dirt is understood as meaning, for example, leaves and other leaf parts.
  • the roof drainage device in the lid elongated slots whose height is smaller than the width thereof.
  • This has the advantage that on the one hand, only a small resistance is opposed to the inflowing water, on the other hand, a pressure flow is formed particularly quickly. If the water rises to a level above an upper edge of the slits, only water flows into the area under the lid. Any remaining air is entrained by the water flow and a negative pressure forms under the lid, which increases the flow of water into the lid ,
  • FIG. 1 shows a roof drainage apparatus 10 for discharging water from a roof 12 having a main inlet 14 and an emergency inlet 16.
  • the main inlet device 14 comprises a main drain pipe 18, which has a cylinder jacket-shaped pipe section 20.
  • the cylinder-jacket-shaped pipe section 20 merges in an orifice section 22 into an orifice 24, which has a mouth opening diameter D M ( FIG. 2 ).
  • the mouth portion 22 merges in a circular mouth opening boundary into a horizontally extending main inlet surface 30.
  • the emergency inlet device 16 is designed to divert water over an emergency drainage height H N and comprises an emergency drainage pipe 26 which has a diameter D N.
  • the emergency drain pipe diameter D N is smaller than a main drain pipe diameter D F (see. FIG. 2 ).
  • the main inlet device 14 comprises a horizontally extending rim 28 having a rim diameter D K which is larger than the mouth opening diameter D M.
  • the brim 28 is disposed to the main run-in surface 30 such that when the main run-in surface 30 is located at the level of a roof seal 32, the brim 38 lies exactly at the emergency drain height H N.
  • the brim 28 runs flat and at a right angle to the emergency drain pipe 26 and thus forms an emergency inlet surface of the emergency inlet device 16.
  • the brim 28 causes a pressure flow to form in the main inlet device 14 when water is above a pressure flow level H D is pending.
  • the brim 28 is designed, for example, such that the pressure flow height H D is below the emergency drain height H N.
  • FIG. 2 shows that the emergency inlet device 16 also comprises a lid 34 which has a substantially cylindrical shape, a lid diameter D D and is concentric with the main drain pipe 18 and the emergency drain pipe 26 is arranged.
  • the lid 34 has a lid rim 36 which extends horizontally and terminates at a height H D which is greater than the emergency drain height H N. Water, which is higher than the emergency drainage height H N , but below the lid rim height H D , runs in the main sequence on the emergency inlet surface in the emergency drain pipe 26. By the brim 28, the pressure flow in the main drain pipe 18 is stabilized.
  • equidistant dirt retaining discs 40a, 40b and 40c are arranged, the outer diameter of which correspond to the rim diameter D K , but which have an inner diameter D i , which is greater than the mouth opening diameter D N.
  • the dirt retaining discs 40 prevent leaves from entering the main drainpipe 18.
  • the roof drainage device 10 is fastened to the roof 12 by fastening means 42a, 42b, 42c.
  • the lid 34 is attached via three webs 44, of which in FIG. 2 only one footbridge is visible.
  • both the main drain pipe 18 and the emergency drain pipe 26 open into a respective branch pipe after a branch point, the two pipes thus produced having the same diameter.
  • FIG. 3 shows a preferred embodiment of a roof drainage device according to the invention, in which the lid 34 is formed as a flat disc.
  • FIG. 4 shows a head portion of the preferred embodiment of the roof drainage device according to FIG. 3 , It can be seen that the cover 34 is formed by an example, 2 mm thick disc having a cover diameter D D and spans all other components of the roof drainage device 10.
  • the brim 28 has a radially outer, in the installed position substantially horizontally extending outer portion 46 and a radially inwardly on the outer portion 46 attaching to the outer portion angled extending inner portion 48.
  • the inner section 48 has a widening section 50 which attaches to the emergency drainage tube 26 and which essentially runs horizontally in the installed position, and a vertical section 52 which adjoins this widening section 50 and is shown in the final FIGURE 2 and which extends essentially vertically.
  • the brim 28 configured radially trough-shaped inside, the emergency drain pipe 26 attaches to a trough bottom.
  • the outer portion 46 is substantially horizontal, it should be understood that it is possible, but not necessary, for the outer portion to be horizontal in the strict sense. Rather, it is possible that the outer portion 46 forms a small angle with the horizontal of, for example, less than 5 °.
  • the inner portion 48 does not necessarily have to be vertical. By the feature that the inner portion 48 extends at an angle to the outer portion 46, it is to be understood in particular that both have an angle of, for example, more than 30 ° with each other. It is also possible that the brim changes in diameter trumpet funnel shape continuously. At the brim 28 guide elements 54.1, ... are arranged, of which in FIG. 4 only the guide element 54.1 can be seen.
  • FIG. 5 shows a perspective view of the rim 28 with the guide elements 54.1, ..., 54.6, which are fastened in equidistant angular steps to the rim 28 and extend radially outward.
  • the guide elements 54 have a height that is smaller by a small amount than a distance between an upper side of the outer portion 46 and the main inlet surface 30 (see FIG. FIG. 4 ).
  • the vanes 54 prevent flow of water in a circumferential direction about the emergency drain pipe 26.
  • FIG. 6 shows a cross section through the brim 28th
  • FIG. 7 shows an embodiment in which the lid diameter D D of the lid 34 corresponds to the rim diameter D K. In this way, a compact roof drainage device is obtained in which the pressure flow in both the main inlet device 14 and in the emergency inlet device 16 jump quickly.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Sink And Installation For Waste Water (AREA)
  • Tents Or Canopies (AREA)

Description

Die Erfindung betrifft eine Dachentwässerungsvorrichtung zum Abführen von Wasser von einem Dach gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a roof drainage device for removing water from a roof according to the preamble of claim 1.

Eine derartige Dachentwässerungsvorrichtung ist aus der DE 10 2005 012 439 und der DE 10 2005 012 438 bekannt. Nachteilig an derartigen Dachentwässerungsvorrichtungen ist, dass das Haupt-Ablaufrohr leicht verschmutzt und oft gereinigt werden muss, wenn die volle Ablaufleistung erhalten bleiben soll.Such a roof drainage device is known from DE 10 2005 012 439 and the DE 10 2005 012 438 known. A disadvantage of such roof drainage devices is that the main drain pipe must be easily contaminated and often cleaned if the full drainage performance is to be maintained.

Aus der DE 102 01 347 A1 ist eine Einlaufvorrichtung für die Abführung von Regenwasser von einem Dach bekannt, bei der das Haupt-Abflussrohr von einer Krempe überdacht ist, um eine Druckströmung zu erzielen. Der Not-Ablauf ist hingegen als Freispiegel-Ablauf ausgebildet. Nachteilig an dieser Ausführungsform ist, dass sie einen beträchtlichen Innendurchmesser für das Not-Ablaufrohr bereitstellen muss, um im Notfall die Wassermassen sicher ableiten zu können. Nachteilig ist zudem, dass der Notablauf und der Freispiegelablauf leicht verschmutzen und dann im Notfall verstopfen können.From the DE 102 01 347 A1 For example, there is known an inlet device for the discharge of rainwater from a roof, in which the main drainage pipe is covered by a brim in order to achieve a pressure flow. The emergency procedure, however, is designed as a free-drain procedure. A disadvantage of this embodiment is that it must provide a considerable inner diameter for the emergency drain pipe in order to be able to discharge the water masses safely in an emergency. Another disadvantage is that the emergency drain and the free-flowing drain can easily become dirty and then clog in an emergency.

Die EP 1 013 843 A1 beschreibt einen Freispiegel-Wasserablauf für ein Flachdach, mit einer Ablauföffnung, die durch einen auf dem Flachdach befestigten flächigen Ringflansch gebildet ist, der an seinem Innendurchmesser einen über eine Krümmung ange-schlossenen zylindrischen Ansatz aufweist, so dass sich eine hohe Ablaufleistung ergibt. Über dem Ablauf kann ein Gitterkäfig als Kiesfang angebracht sein.The EP 1 013 843 A1 describes a free-standing water drain for a flat roof, with a drain opening, which is formed by a flat ring mounted on the flat roof flange, which connected at its inner diameter via a curvature having cylindrical approach, so that there is a high drainage performance. Over the expiry, a grid cage may be attached as a gravel trap.

Die DE 2004 024 904 A1 offenbart einen Dachablauf, der einen ringförmigen Plattenteil als Ablauffläche sowie einen zentralen Muldenteil mit einer zentralen Ablauföffnung aufweist. Über der Ablauföffnung ist weiterhin eine Abdeckplatte angebracht, die in ihrem äußeren Bereich mit einem Ringschlitz versehen ist und auf deren Oberseite in radialer Richtung angeordnete Lamellen zur Strömungsführung vorgesehen sind.The DE 2004 024 904 A1 discloses a roof drain having an annular plate portion as drainage surface and a central bowl portion with a central drainage opening. Above the drain opening a cover plate is further attached, which is provided in its outer region with a ring slot and on the upper side in the radial direction arranged lamellae are provided for flow guidance.

Der Erfindung liegt die Aufgabe zugrunde, eine Dachentwässerungsvorrichtung anzugeben, die ein geringeres Risiko des Verstopfens aufweist.The invention has for its object to provide a roof drainage device, which has a lower risk of clogging.

Die Erfindung löst das Problem durch eine gattungsgemäße Dachentwässerungsvorrichtung gemäß Anspruch 1.The invention solves the problem by a generic roof drainage device according to claim 1.

Vorteilhaft an dieser Dachentwässerungsvorrichtung ist es, dass das Wasser dann, wenn es ungefähr auf Höhe der Notablaufhöhe auf dem Dach ansteht, eine Druckströmung in dem Haupt-Ablaufrohr ausbildet. Dabei entsteht eine hohe Strömungsgeschwindigkeit, die etwaige Verschmutzungen mitreißt. Bei Verschmutzung des Haupt-Ablaufrohrs steht das Wasser zudem im Mittel höher auf dem Dach an, so dass die Wahrscheinlichkeit wächst, dass sich eine Druckströmung ausbildet. In anderen Worten kommt es zu einer negativen Rückkopplung, bei der bei Verschmutzung des Haupt-Ablaufrohrs eher eine Reinigung eintritt. Man erhält so eine im Wesentlichen wartungsfreie Dachentwässerungsvorrichtung.An advantage of this roof drainage device is that the water when it is approximately at the height of the emergency drainage height on the roof, forms a pressure flow in the main drain pipe. This creates a high flow velocity, which entrains any dirt. If the main drainpipe becomes dirty, the water also rises higher on the roof on average, which increases the likelihood that a pressure flow will develop. In other words, there is a negative feedback in which occurs when contamination of the main drain pipe rather a cleaning. This gives a substantially maintenance-free roof drainage device.

Vorteilhaft ist zudem, dass das Wasser auch dann geräuscharm abfließt, wenn der Wasserspiegel ungefähr die Höhe der Notablaufhöhe hat, weil es aufgrund der Krempe zu keinem geräuschbehafteten Abreißen der Wasserströmung kommt.It is also advantageous that the water drains quietly even when the water level has approximately the height of the emergency drainage height, because there is no noisy tearing of the water flow due to the brim.

Es ist ein weiterer Vorteil, dass sich bei großen Wasserhöhen auch im Haupt-Ablaufrohr eine Druckströmung ausbildet, so dass dann, wenn viel Wasser auf dem Dach ansteht, die Abflussleistung der Dachentwässerungsvorrichtung besonders hoch ist. Vorteilhaft ist zudem, dass die erfindungsgemäße Dachentwässerungsvorrichtung einfach aufgebaut ist und somit kostengünstig hergestellt werden kann.It is a further advantage that forms a pressure flow at high water levels in the main drain pipe, so that when there is a lot of water on the roof, the drainage capacity of the roof drainage device is particularly high. It is also advantageous that the roof drainage device according to the invention is simple and thus can be produced inexpensively.

Durch die Krempe wird erreicht, dass sich bei einer Wasserhöhe, die in etwa der Notablaufhöhe entspricht, auch im Haupt-Ablaufrohr eine Druckströmung ausbildet, was die Ableitkapazität des Haupt-Ablaufrohrs deutlich erhöht. Dadurch steigt insgesamt die Ableitleistung der Dachentwässerungsvorrichtung. Die Krempe ist also so angeordnet, dass sich dann, wenn Wasser oberhalb der Notablaufhöhe ansteht, in dem Haupt-Ablaufrohr eine Druckströmung ausbildet. Das heißt, dass sich im Haupt-Ablaufrohr eine im Wesentlichen von großen Luftblasen freie Wassersäule ausbildet, so dass unterhalb der Krempe ein Unterdruck anliegt.By the brim it is achieved that at a water level which corresponds approximately to the Notablaufhöhe, also forms a pressure flow in the main drain pipe, which significantly increases the discharge capacity of the main drain pipe. As a result, the total dissipation of the roof drainage device increases. The brim is thus arranged so that, when water is present above the Notablaufhöhe, forms a pressure flow in the main drain pipe. This means that a water column substantially free of large air bubbles forms in the main drain pipe, so that a negative pressure is applied below the brim.

Unter dem Merkmal, dass der Querschnitt der Krempe mindestens so groß ist wie die Mündungsöffnung, ist insbesondere zu verstehen, dass die Krempe die Mündungsöffnung vollständig überdacht. Wenn also die Krempe und die Mündungsöffnung beispielsweise beide kreisförmig berandet und konzentrisch übereinander angeordnet sind, so ist der Krempendurchmesser mindestens so groß wie der Mündungsdurchmesser.By the feature that the cross section of the brim is at least as large as the mouth opening, it is to be understood in particular that the brim completely covers the mouth opening. If, for example, the brim and the mouth opening are both bounded in a circular manner and arranged concentrically one above the other, the rim diameter is at least as large as the mouth diameter.

In einer bevorzugten Ausführungsform besitzt die Haupt-Einlaufvorrichtung eine Haupt-Einlauffläche, die durch eine Einlauföffnungsberandung in die Mündungsöffnung des Haupt-Ablaufrohrs übergeht, wobei die Krempe in vertikaler Projektion die Einlauföffnungsberandung vollständig überspannt. Vorteilhaft hieran ist, dass sich die Druckströmung dann, wenn der Wasserspiegel ungefähr der Notablaufhöhe entspricht, besonders gut ausbilden kann. Dadurch erreicht die Dachentwässerungsvorrichtung bei derartigen Wasserständen eine besonders hohe Ableitwirkung,In a preferred embodiment, the main inlet device has a main inlet surface, which passes through an inlet opening boundary in the mouth opening of the main drain pipe, wherein the brim in vertical projection completely spans the inlet opening boundary. The advantage of this is that the pressure flow, if the water level corresponds approximately to the emergency drainage, can form particularly well. As a result, the roof drainage device achieves a particularly high dissipation effect in the case of such water levels,

Unter der Einlauföffnungsberandung wird insbesondere der Übergang von der horizontal verlaufenden Haupt-Einlauffläche zu dem gegen die Horizontale geneigten Haupt-Ablaufrohr verstanden. In anderen Worten umschließt die vertikale Projektion der Krempe die Mündungsöffnung, genauer die Mündungsöffnungsberandung.Under the inlet opening boundary is understood in particular the transition from the horizontally extending main inlet surface to the inclined to the horizontal main drain pipe. In other words, the vertical projection of the brim encloses the mouth opening, more specifically the mouth opening boundary.

In einer bevorzugten Ausführungsform ist vorgesehen, dass das Haupt-Ablaufrohr nach oben von einem zylindermantelförmigen Rohrabschnitt in einen kegelstumpfartig erweiterten Rohrabschnitt übergeht, dessen oberes Ende die Mündungsöffnung bildet.In a preferred embodiment, it is provided that the main drain pipe merges upward from a cylinder jacket-shaped pipe section into a truncated cone-like widened pipe section whose upper end forms the mouth opening.

Bevorzugt ist eine Haupt-Ablaufrohrquerschnittsfläche des Haupt-Ablaufrohrs größer als eine Not-Ablaufromquerschnittsfläche des Not-Ablaufrohrs. Beispielsweise ist die Haupt-Ablaufrohrquerschnittsfläche mindestens doppelt so groß wie die Not-Ablaufrohrquerschnittsfläche. Dadurch wird eine besonders kompakte Dachentwässerungsvorrichtung erhalten, die trotzdem auch oberhalb der Notablaufhöhe anstehendes Wasser sicher abführt, da sich im Not-Ablaufrohr eine Druckströmung ausbilden kann.Preferably, a main drain pipe cross-sectional area of the main drain pipe is larger than an emergency drain cross-sectional area of the emergency drain pipe. For example, the main drain pipe cross-sectional area is at least twice as large as the emergency drain pipe cross-sectional area. As a result, a particularly compact roof drainage device is obtained, which nonetheless reliably dissipates water which is still present above the emergency drainage height, since a pressure flow can form in the emergency drainage pipe.

Bevorzugt bildet die Krempe eine Not-Einlauffläche der Not-Einlaufvorrichtung, die bündig mit dem Not-Ablaufrohr abschließt. In diesem Fall hat die Krempe zwei Funktionen, die einander ergänzen. Preferably, the brim forms an emergency inlet surface of the emergency inlet device, which terminates flush with the emergency drainage pipe. In this case, the brim has two functions that complement each other.

Gemäß einer bevorzugten Ausführungsform umfasst die Not-Einlaufvorrichtung einen luftdichten Deckel, der einen nach unten offenen und ansonsten luftdicht abgeschlossenen Hohlraum bildet und oberhalb der Krempe angeordnet ist, wobei der Deckel einen Deckeldurchmesser hat, der kleiner ist als ein Krempen-Durchmesser der Krempe, Besonders bevorzugt ist der Durchmesseer der Mündungsöffnung kleiner als der Deckeldurchmesser und dieser wiederum kleiner als der Krempendurchmesser, Es ergibt so eine besonders kompakte Dachentwässerungsvorrichtung, die bei allen möglichen Wasserhöhen eine besonders geringe Geräuschentwicklung aufweist.According to a preferred embodiment, the emergency inlet device comprises an airtight lid which forms a downwardly open and otherwise airtight cavity and is disposed above the brim, the lid having a lid diameter smaller than a brim diameter of the brim Preferably, the Durchmesseer of the mouth opening is smaller than the cover diameter and this in turn smaller than the Krempendurchmesser, It thus results in a particularly compact roof drainage device, which has a particularly low noise at all possible water heights.

Es ist bevorzugt, dass die Krempe in Einbaulage der Dachentwässerungsvorrichtung im Wesentlichen horizontal verläuft. Hierunter ist zu verstehen, dass die Krempe nicht im strengen mathematischen Sinn horizontal verlaufen muss, sondern kleine Abweichungen von zum Beispiel weniger als 5° tolerabel sind. Die Krempe kann die Form einer ebenen Scheibe haben. Auf diese Weise werden Geräusche besonders effektiv unterdrückt. Die Krempe kann aber auch konvex geformt sein und so einen nach unten offenen, luftdichten Hohlraum bilden.It is preferable that the brim in the installation position of the roof drainage device is substantially horizontal. By this is meant that the brim does not have to be horizontal in the strict mathematical sense, but small deviations of, for example, less than 5 ° are tolerable. The brim can have the shape of a flat disc. In this way, noises are suppressed particularly effectively. The brim can also be convex and thus form a downwardly open, airtight cavity.

Eine besonders einfach zu fertigende Dachentwässerungsvorrichtung ergibt sich, wenn das Not-Ablaufrohr zylinderförmig ist. Ein weiterer Vorteil ist, dass ein zylinderförmiges Not-Ablaufrohr besonders effektiv eine Druckströmung aufbaut, so dass eine Entwässerung des Dachs stets effizient möglich ist.A particularly easy to produce roof drainage device results when the emergency drain pipe is cylindrical. A further advantage is that a cylindrical emergency drainage pipe builds up a pressure flow particularly effectively, so that dewatering of the roof is always possible in an efficient manner.

Gemäß einer bevorzugten Ausführungsform besitzt die Dachentwässerungsvorrichtung zumindest ein außen verlaufendes Leitelemente zum Vermindern oder Unterdrücken einer Radialströmung in Wasser, das in die Haupt-Einlaufvorrichtung und/oder die Not-Einlaufvorrichtung einläuft. Dabei können zwei, drei oder eine Mehrzahl an Leitelementen vorgesehen sein, die vorzugsweise in gleichen Winkelschritten angeordnet sind. So werden Wirbel insbesondere in dem Wasser vermieden, das in die Haupt-Einlaufvorrichtung einläuft, und es bildet sich besonders schnell eine Druckströmung in dem Haupt-Ablaufrohr aus. Die Leitelemente können beispielsweise Leitbleche sein.According to a preferred embodiment, the roof drainage device has at least one outer guide element for reducing or suppressing a radial flow in water entering the main inlet device and / or the emergency inlet device. In this case, two, three or a plurality of guide elements can be provided, which are preferably arranged in the same angular increments. Thus, vortices are avoided, especially in the water entering the main inlet device, and a pressure flow in the main outlet tube forms particularly quickly. The guide elements may be baffles, for example.

Bevorzugt weist die Krempe einen radial äußeren, in Einbaulage im Wesentlichen horizontal verlaufenden Außenabschnitt und einen radial innen am Außenabschnitt ansetzenden, zum Außenabschnitt winklig verlaufenden Innenabschnitt auf. So bildet sich besonders schnell eine Druckströmung im Haupt-Ablaufrohr aus.Preferably, the brim has a radially outer, in the installed position substantially horizontally extending outer portion and a radially inwardly on the outer portion attached, the outer portion angled extending inner portion. Thus, a pressure flow in the main drain pipe is formed very quickly.

Diese Krempe ist besonders einfach zu fertigen, wenn Innenabschnitt einen am Not-Ablaufrohr ansetzenden, in Einbaulage im Wesentlichen horizontal verlaufenden Aufweitungsabschnitt und einen sich an den Aufweitungsabschnitt anschließenden, in Einbaulage im Wesentlichen vertikal verlaufenden Vertikalabschnitt aufweist.This brim is particularly easy to manufacture, if the inner section has a widening section which essentially adjoins the emergency drain pipe and which extends essentially horizontally in the installed position, and a vertical section which adjoins the widening section and which extends substantially vertically in the installed position.

Gemäß einer bevorzugten Ausführungsform weist die Not-Einlaufvorrichtung einen luftdichten Deckel auf, der unterhalb der Krempe angeordnet ist und einen Deckeldurchmesser hat, der größer ist als der Krempendurchmesser der Krempe. Auf diese Weise kann eine besonders flach bauende Dachentwässerungsvorrichtung erhalten werden, die bei Übersteigen der Notablaufhöhe dennoch sicher das überschüssige Wasser in den Notablauf befördert.According to a preferred embodiment, the emergency inlet device comprises an airtight lid, which is arranged below the brim and has a lid diameter which is greater than the rim diameter of the brim. In this way, a particularly flat-roof roof drainage device can be obtained, which nevertheless safely carries the excess water into the emergency drain when exceeding the emergency drainage height.

Besonders bevorzugt weist die Dachentwässerungsvorrichtung eine Schmutzrückhaltevorrichtung auf, die so ausgebildet ist, dass sowohl solcher Grobschmutz zurückgehalten wird, der im Wasser enthalten ist, das in das Haupt-Ablaufrohr läuft, als auch solcher Grobschmutz zurückgehalten wird, der in Wasser enthalten ist, das in das Not-Ablauflaufrohr läuft. In anderen Worten ist die Schmutzrückhaltevorrichtung ausgebildet, um Grobschmutz aus allem Wasser zurückzuhalten, was in einen der beiden Abläufe einläuft. Es kann sich dabei beispielsweise um ein Gitter oder um einen Rechen handeln. Vorteilhaft hieran ist, dass dann, wenn sich in dem Haupt-Ablaufrohr eine Druckströmung ausbildet, die Schmutzrückhaltevorrichtung gereinigt wird. Ein gesondertes Reinigen der Schmutzrückhaltevorrichtung ist daher weitgehend entbehrlich. Unter Grobschmutz werden beispielsweise Blätter und andere Blattteile verstanden.Particularly preferably, the roof drainage device comprises a dirt retention device, which is designed so that both such coarse dirt contained in the water, which runs in the main drain pipe, as well as such coarse dirt is contained, which is contained in water, which in the emergency drain pipe is running. In other words, the dirt retention device is designed to retain coarse dirt from all water, which enters one of the two processes. It may be, for example, a grid or a rake. The advantage of this is that when a pressure flow forms in the main drain pipe, the dirt retention device is cleaned. Separate cleaning of the dirt retention device is therefore largely unnecessary. Coarse dirt is understood as meaning, for example, leaves and other leaf parts.

Bevorzugt weist die Dachentwässerungsvorrichtung in dem Deckel längliche Schlitze auf, deren Höhe kleiner ist als deren Breite. In anderen Worten liegen die Schlitze. Das hat den Vorteil, dass einerseits dem einströmenden Wasser nur ein geringer Widerstand entgegengesetzt wird, andererseits bildet sich besonders schnell eine Druckströmung aus. Steigt nämlich das Wasser auf eine Höhe oberhalb einer Oberkante der Schlitze, so strömt nur noch Wasser in den Bereich unter dem Deckel, Noch dort vorhandene Luft wird vom Wasserstrom mitgerissen und es bildet sich unter dem Deckel ein Unterdruck, der den Wasserstrom in den Deckel erhöht.Preferably, the roof drainage device in the lid elongated slots whose height is smaller than the width thereof. In other words, there are the slits. This has the advantage that on the one hand, only a small resistance is opposed to the inflowing water, on the other hand, a pressure flow is formed particularly quickly. If the water rises to a level above an upper edge of the slits, only water flows into the area under the lid. Any remaining air is entrained by the water flow and a negative pressure forms under the lid, which increases the flow of water into the lid ,

Im Folgenden werden beispielhafte Ausführungsformen der Erfindung anhand der beigefügten Zeichnungen näher erläutert. Dabei zeigt

Figur 1
einen Querschnitt durch eine erfindungsgemäße Dachentwässerungsvorrichtung,
Figur 2
einen Kopfabschnitt der Dachentwässerungsvorrichtung nach Figur 1,
Figur 3
einen Querschnitt durch eine bevorzugte erfindungsgemäße Dachentwässerungsvorrichtung auf einem erfindungsgemäßen Dach,
Figur 4
einen Kopfabschnitt der Dachentwässerungsvorrichtung nach Figur 3,
Figur 5
ein Detail der Dachentwässerungsvorrichtung nach den Figuren 3 und 4,
Figur 6
einen Querschnitt durch das Detail nach Figur 5 und
Figur 7
einen Querschnitt durch eine weitere erfindungsgemäße Dachentwässerungsvorrichtung.
In the following, exemplary embodiments of the invention are explained in more detail with reference to the accompanying drawings. It shows
FIG. 1
a cross section through a roof drainage device according to the invention,
FIG. 2
a head portion of the roof drainage device according to FIG. 1 .
FIG. 3
a cross section through a preferred roof drainage device according to the invention on a roof according to the invention,
FIG. 4
a head portion of the roof drainage device according to FIG. 3 .
FIG. 5
a detail of the roof drainage device according to Figures 3 and 4 .
FIG. 6
a cross section through the detail after FIG. 5 and
FIG. 7
a cross section through another roof drainage device according to the invention.

Figur 1 zeigt eine Dachentwässerungsvorrichtung 10 zum Abführen von Wasser von einem Dach 12, die eine Haupt-Einlaufvorrichtung 14 und eine Not-Einlaufvorrichtung 16 besitzt. FIG. 1 FIG. 10 shows a roof drainage apparatus 10 for discharging water from a roof 12 having a main inlet 14 and an emergency inlet 16.

Die Haupt-Einlaufvorrichtung 14 umfasst ein Haupt-Ablaufrohr 18, das einen zylindermantelförmigen Rohrabschnitt 20 besitzt. Der zylindermantelförmige Rohrabschnitt 20 geht in einem Mündungsabschnitt 22 in eine Mündungsöffnung 24 über, die einen Mündungsöffnungsdurchmesser DM hat (Figur 2). Der Mündungsabschnitt 22 geht in einer kreisförmigen Mündungsöffnungsberandung in eine horizontal verlaufende Haupt-Einlauffläche 30 über.The main inlet device 14 comprises a main drain pipe 18, which has a cylinder jacket-shaped pipe section 20. The cylinder-jacket-shaped pipe section 20 merges in an orifice section 22 into an orifice 24, which has a mouth opening diameter D M ( FIG. 2 ). The mouth portion 22 merges in a circular mouth opening boundary into a horizontally extending main inlet surface 30.

Die Not-Einlaufvorrichtung 16 ist ausgebildet zum Ableiten von über eine Notablaufhöhe HN anstehendem Wasser und umfasst ein Not-Ablaufrohr 26, das einen Durchmesser DN hat. Der Not-Ablaufrohrdurchmesser DN ist kleiner als ein Haupt-Ablaufrohrdurchmesser DF (vgl. Figur 2). Die Not-Ablaufrohrquerschnittsfläche berechnet sich zu AN = πDN und die Haupt-Ablaufrohrquerschnittsfläche zu AP = πDP - πDN, wobei AF mehr als das Doppelte von AN beträgt, im vorliegenden Fall ungefähr das Dreifache.The emergency inlet device 16 is designed to divert water over an emergency drainage height H N and comprises an emergency drainage pipe 26 which has a diameter D N. The emergency drain pipe diameter D N is smaller than a main drain pipe diameter D F (see. FIG. 2 ). The emergency drain tube cross-sectional area is calculated to A N = πD N and the main drain tube cross-sectional area to A P = πD P - πD N , where A F is more than twice AN, approximately three times in the present case.

Die Haupt-Einlaufvorrichtung 14 umfasst eine horizontal verlaufende Krempe 28 mit einem Krempendurchmesser DK, der größer ist als der Mündungsöffnungsdurchmesser DM. Die Krempe 28 ist so zu der Haupt-Einlauffläche 30 angeordnet, dass dann, wenn die Haupt-Einlauffläche 30 in Höhe einer Dachversiegelung 32 angeordnet ist, die Krempe 38 genau auf der Notablaufhöhe HN liegt. Die Krempe 28 verläuft eben und in einem rechten Winkel zum Not-Ablaufrohr 26 und bildet so eine Not-Einlauffläche der Not-Einlaufvorrichtung 16. Die Krempe 28 bewirkt, dass sich in der Haupt-Einlaufvorrichtung 14 eine Druckströmung ausbildet, wenn Wasser oberhalb einer Druckströmungshöhe HD ansteht. Die Krempe 28 ist beispielsweise so ausgebildet, dass die Druckströmungshöhe HD unterhalb der Notablaufhöhe HN liegt.The main inlet device 14 comprises a horizontally extending rim 28 having a rim diameter D K which is larger than the mouth opening diameter D M. The brim 28 is disposed to the main run-in surface 30 such that when the main run-in surface 30 is located at the level of a roof seal 32, the brim 38 lies exactly at the emergency drain height H N. The brim 28 runs flat and at a right angle to the emergency drain pipe 26 and thus forms an emergency inlet surface of the emergency inlet device 16. The brim 28 causes a pressure flow to form in the main inlet device 14 when water is above a pressure flow level H D is pending. The brim 28 is designed, for example, such that the pressure flow height H D is below the emergency drain height H N.

Figur 2 zeigt, dass die Not-Einlaufvorrichtung 16 zudem einen Deckel 34 umfasst, der eine im Wesentlichen zylinderförmige Gestalt hat, einen Deckeldurchmesser DD besitzt und konzentrisch zum Haupt-Ablaufrohr 18 und zum Not-Ablaufrohr 26 angeordnet ist. Der Deckel 34 hat eine Deckelkrempe 36, die horizontal verläuft und in einer Höhe HD endet, die größer ist als die Notablaufhöhe HN. Wasser, das höher ansteht als die Notablaufhöhe HN, aber unterhalb der Deckelkrempenhöhe HD, läuft im Haupt-Ablauf über die Not-Einlauffläche in das Not-Ablaufrohr 26. Durch die Krempe 28 wird die Druckströmung im Haupt-Ablaufrohr 18 stabilisiert. FIG. 2 shows that the emergency inlet device 16 also comprises a lid 34 which has a substantially cylindrical shape, a lid diameter D D and is concentric with the main drain pipe 18 and the emergency drain pipe 26 is arranged. The lid 34 has a lid rim 36 which extends horizontally and terminates at a height H D which is greater than the emergency drain height H N. Water, which is higher than the emergency drainage height H N , but below the lid rim height H D , runs in the main sequence on the emergency inlet surface in the emergency drain pipe 26. By the brim 28, the pressure flow in the main drain pipe 18 is stabilized.

Wasser, das oberhalb der Deckelkrempenhöhe HD ansteht, wird von in einem Deckeldom 38 des luftdichten Deckels 34 anstehendem Unterdruck angesogen, so dass sich im Not-Ablaufrohr 26 eine Druckströmung ausbildet. Der Unterdruck im Deckeldom 38 entsteht dadurch, dass im Deckeldom 38 vorhandene Luft von dem durch das Not-Ablaufrohr 26 abströmenden Wasser mitgerissen wird. Das entspricht dem Prinzip der Wasserstrahlpumpe.Water, which is present above the lid rim height H D , is sucked in by a lideldom 38 of the airtight lid 34 pending negative pressure, so that forms a pressure flow in the emergency drain pipe 26. The negative pressure in the lidoma 38 arises from the fact that 38 existing air is entrained in the lid cathedral from the effluent through the emergency drain pipe 26 water. This corresponds to the principle of the water jet pump.

Wenn das Wasser nur knapp unterhalb der Deckelkrempenhöhe HD ansteht, so kann sich im Deckeldom 38 kein stabiler Unterdruck aufbauen. Es kommt zu Druckschwankungen. Dadurch, dass der Deckeldurchmesser DD kleiner ist als der Krempendurchmesser DK oder so groß wie dieser, wird verhindert, dass diese Druckschwankungen einen negativen Einfluss auf die Druckströmung im Haupt-Ablaufrohr 18 haben. Geräusche werden so wirksam vermindert.If the water is present only just below the lid rim height H D , then no stable negative pressure can build up in the lid drum 38. It comes to pressure fluctuations. The fact that the cover diameter D D is smaller than the rim diameter D K or as large as this, prevents these pressure fluctuations have a negative impact on the pressure flow in the main drain pipe 18. Noise is effectively reduced.

Wenn Wasser oberhalb der Notablaufhöhe HN ansteht, so wird auch im Haupt-Ablaufrohr 18 anstehendes Wasser mit nach unten gerissen, so dass sich durch die Krempe 28 auch dort eine Druckströmung einstellt. Die Ausbildung der Druckströmung wird dabei durch die Krempe 28 unterstützt.If water is present above the emergency drainage height H N , water which is present in the main drainage pipe 18 is also torn down so that a pressure flow is established there by the brim 28. The formation of the pressure flow is supported by the brim 28.

In vertikaler Richtung zwischen der Haupt-Einlauffläche 30 und der Notablaufhöhe HN sind äquidistant Schmutzrückhaltescheiben 40a, 40b und 40c angeordnet, deren Außendurchmesser dem Krempendurchmesser DK entsprechen, die jedoch einen Innendurchmesser Di besitzen, der größer ist als der Mündungsöffnungsdurchmesser DN. Die Schmutzrückhaltescheiben 40 verhindern, dass Laub in das Haupt-Ablaufrohr 18 gelangen.In the vertical direction between the main inlet surface 30 and the emergency drainage height H N equidistant dirt retaining discs 40a, 40b and 40c are arranged, the outer diameter of which correspond to the rim diameter D K , but which have an inner diameter D i , which is greater than the mouth opening diameter D N. The dirt retaining discs 40 prevent leaves from entering the main drainpipe 18.

Die Dachentwässerungsvorrichtung 10 ist durch Befestigungsmittel 42a, 42b, 42c am Dach 12 befestigt. Der Deckel 34 ist über drei Stege 44 befestigt, von denen in Figur 2 nur ein Steg sichtbar ist.The roof drainage device 10 is fastened to the roof 12 by fastening means 42a, 42b, 42c. The lid 34 is attached via three webs 44, of which in FIG. 2 only one footbridge is visible.

Günstig ist es, wenn sowohl das Haupt-Ablaufrohr 18 als auch das Not-Ablaufrohr 26 nach einer Verzweigungsstelle in jeweils ein Rohr münden, wobei die beiden so entstehenden Rohre den gleichen Durchmesser haben.It is favorable if both the main drain pipe 18 and the emergency drain pipe 26 open into a respective branch pipe after a branch point, the two pipes thus produced having the same diameter.

Figur 3 zeigt eine bevorzugte Ausführungsform einer erfindungsgemäßen Dachentwässerungsvorrichtung, bei der der Deckel 34 als flache Scheibe ausgebildet ist. FIG. 3 shows a preferred embodiment of a roof drainage device according to the invention, in which the lid 34 is formed as a flat disc.

Figur 4 zeigt einen Kopfabschnitt der bevorzugten Ausführungsform der Dachentwässerungsvorrichtung gemäß Figur 3. Es ist zu erkennen, dass der Deckel 34 durch eine beispielsweise 2 mm dicke Scheibe gebildet ist, die einen Deckeldurchmesser DD aufweist und alle anderen Komponenten der Dachentwässerungsvorrichtung 10 überspannt. Im Unterschied zu der Ausführungsform gemäß den Figuren 1 und 2 weist die Krempe 28 einen radial äußeren, in Einbaulage im Wesentlichen horizontal verlaufenden Außenabschnitt 46 und einen radial innen am Außenabschnitt 46 ansetzenden, zum Außenabschnitt winklig verlaufenden Innenabschnitt 48 auf. FIG. 4 shows a head portion of the preferred embodiment of the roof drainage device according to FIG. 3 , It can be seen that the cover 34 is formed by an example, 2 mm thick disc having a cover diameter D D and spans all other components of the roof drainage device 10. In contrast to the embodiment according to the FIGS. 1 and 2 the brim 28 has a radially outer, in the installed position substantially horizontally extending outer portion 46 and a radially inwardly on the outer portion 46 attaching to the outer portion angled extending inner portion 48.

Der Innenabschnitt 48 wiederum hat einen am Not-Ablaufrohr 26 ansetzenden, in Einbaulage im Wesentlichen horizontal verlaufenden Aufweitungsabschnitt 50 und einen sich an diesen Aufweitungsabschnitt 50 anschließenden und in der Endfigur 2 gezeigten Einbaulage im Wesentlichen vertikal verlaufenden Vertikalabschnitt 52. In anderen Worten ist die Krempe 28 radial innen trogförmig ausgestaltet, wobei das Not-Ablaufrohr 26 an einem Trogboden ansetzt. Darunter, dass der Außenabschnitt 46 im Wesentlichen horizontal verläuft, ist zu verstehen, dass es möglich, nicht aber notwendig ist, dass der Außenabschnitt im strengen Sinne horizontal verläuft. Es ist vielmehr möglich, dass der Außenabschnitt 46 einen kleinen Winkel mit der Horizontalen von beispielsweise weniger als 5° bildet.The inner section 48, in turn, has a widening section 50 which attaches to the emergency drainage tube 26 and which essentially runs horizontally in the installed position, and a vertical section 52 which adjoins this widening section 50 and is shown in the final FIGURE 2 and which extends essentially vertically. In other words, the brim 28 configured radially trough-shaped inside, the emergency drain pipe 26 attaches to a trough bottom. Assuming that the outer portion 46 is substantially horizontal, it should be understood that it is possible, but not necessary, for the outer portion to be horizontal in the strict sense. Rather, it is possible that the outer portion 46 forms a small angle with the horizontal of, for example, less than 5 °.

Der Innenabschnitt 48 muss nicht zwangsläufig vertikal verlaufen. Unter dem Merkmal, dass der Innenabschnitt 48 winklig zum Außenabschnitt 46 verläuft, ist insbesondere zu verstehen, dass beide einen Winkel von beispielsweise mehr als 30° miteinander aufweisen. Es ist zudem möglich, dass sich die Krempe trompetentrichterförmig kontinuierlich im Durchmesser ändert. An der Krempe 28 sind Leitelemente 54.1, ... angeordnet, von denen in Figur 4 lediglich das Leitelement 54.1 zu sehen ist.The inner portion 48 does not necessarily have to be vertical. By the feature that the inner portion 48 extends at an angle to the outer portion 46, it is to be understood in particular that both have an angle of, for example, more than 30 ° with each other. It is also possible that the brim changes in diameter trumpet funnel shape continuously. At the brim 28 guide elements 54.1, ... are arranged, of which in FIG. 4 only the guide element 54.1 can be seen.

Figur 5 zeigt eine perspektivische Ansicht der Krempe 28 mit den Leitelementen 54.1, ..., 54.6, die in äquidistanten Winkelschritten an der Krempe 28 befestigt sind und radial auswärts verlaufen. Die Leitelemente 54 besitzen eine Höhe, die um einen kleinen Betrag kleiner ist als ein Abstand zwischen einer Oberseite des Außenabschnitts 46 und der Haupt-Einlauffläche 30 (vgl. Figur 4). Die Leitelemente 54 verhindern eine Strömung des Wassers in einer Umfangsrichtung um das Not-Ablaufrohr 26. FIG. 5 shows a perspective view of the rim 28 with the guide elements 54.1, ..., 54.6, which are fastened in equidistant angular steps to the rim 28 and extend radially outward. The guide elements 54 have a height that is smaller by a small amount than a distance between an upper side of the outer portion 46 and the main inlet surface 30 (see FIG. FIG. 4 ). The vanes 54 prevent flow of water in a circumferential direction about the emergency drain pipe 26.

Figur 6 zeigt einen Querschnitt durch die Krempe 28. Figur 7 zeigt eine Ausführungsform, bei der der Deckeldurchmesser DD des Deckels 34 dem Krempendurchmesser DK entspricht. Auf diese Weise wird eine kompakte Dachentwässerungsvorrichtung erhalten, bei der die Druckströmung sowohl in der Haupt-Einlaufvorrichtung 14 als auch in der Not-Einlaufvorrichtung 16 schnell anspringen. FIG. 6 shows a cross section through the brim 28th FIG. 7 shows an embodiment in which the lid diameter D D of the lid 34 corresponds to the rim diameter D K. In this way, a compact roof drainage device is obtained in which the pressure flow in both the main inlet device 14 and in the emergency inlet device 16 jump quickly.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1010
DachentwässerungsvorrichtungRoof drainage device
1212
Dachtop, roof
1414
Haupt-EinlaufvorrichtungMain inlet device
1616
Not-EinlaufvorrichtungEmergency inlet device
1818
Haupt-AblaufrohrMain flow pipe
2020
zylindermantelförmiger Rohrabschnittcylinder jacket-shaped pipe section
2222
Mündungsabschnittmouth portion
2424
Mündungsöffnungmouth
2626
Not-AblaufrohrEmergency drain pipe
2828
Krempebrim
3030
Haupt-EinlaufflächeMain lead-in area
3232
Dachversiegelungroof sealing
3434
Deckelcover
3636
Deckelkrempecap brim
3838
DeckeldomDeckeldom
4040
SchmutzrückhaltescheibenDirt retaining washers
4242
Befestigungsmittelfastener
4444
Stegweb
4646
Außenabschnittouter portion
4848
Innenabschnittinner portion
5050
Aufweitungsabschnittexpansion section
5252
Vertikalabschnittvertical section
5454
Leitelementvane
Di D i
InnendurchmesserInner diameter
DM D M
MündungsöffnungsdurchmesserOrifice diameter
DN D N
Not-AblaufrohrdurchmesserEmergency drain pipe diameter
DF D F
Haupt-AblaufrohrdurchmesserMain flow pipe diameter
DD D D
DeckeldurchmesserCover diameter
DK D K
KrempendurchmesserKremp diameter
HN H N
NotablaufhöheNotablaufhöhe
HD' H D '
DeckelkrempenhöheKremp cover height

Claims (14)

  1. A roof drainage device (10) for the draining of water from a roof (12), with
    (a) a main drainage pipe (18) and a main inflow device (14) for main drainage into the main drainage pipe (18) comprising an opening (24) and
    (b) an emergency inflow device (16) for the draining of water that surpasses a predetermined emergency drainage height above the opening (24) by means of a siphonic system in an emergency drainage pipe (26),
    (i) whose free cross-section is smaller than that of the main drainage pipe (18) and
    (ii) at least a part of whose length extends inside the cross-section of the main drainage pipe (18),
    (c) whereby the main inflow device (14) comprises a brim (28) whose cross-section is at least as large as the opening (24), wherein
    (d) the brim (28) has an essentially circular edge and wherein
    (e) the brim (28) is arranged in such a way that, if water reaches the height of the emergency drainage height on the roof, a siphonic system forms in the main drainage pipe (18),
    characterised by the fact that
    the brim (28) has a brim diameter (DK) which is at least twice as large as a main drainage pipe diameter (DF) of the main drainage pipe (18).
  2. The roof drainage device (10) according to one of the above claims, characterised by the fact that the main inflow device (14) comprises a main inflow surface (30) which passes over an edge of the opening into the opening (24) of the main drainage pipe (18), and that the brim (28) completely spans the edge of the opening in a vertical projection.
  3. The roof drainage system (10) according to one of the above claims, characterised by the fact that a main cross-sectional area of the main drainage pipe (18) is greater than a cross-sectional area of the emergency drainage pipe (26).
  4. The roof drainage device (10) according to one of the above claims, characterised by the fact that the brim (28) forms an emergency inflow surface of the emergency inflow device (16) and is flush with the emergency drainage pipe (26).
  5. The roof drainage device (10) according to one of the above claims, characterised by the fact that the emergency inflow device (16) comprises an air-tight cap (34) which
    - forms a cavity (38) that is open at the bottom, but otherwise air-tight, and
    - is arranged above the brim (28),
    - whereby the cap has a cap diameter (DD) that is, at most, as large as a brim diameter (DK) of the brim (28).
  6. The roof drainage device (10) according to one of the above claims, characterised by the fact that the emergency drainage pipe (26) is cylindrical.
  7. The roof drainage device (10) according to one of the above claims, characterised by at least one guide element (54) that runs radially outwards to reduce a radial flow of water running into the main inflow device (14) and/or the emergency inflow device (16).
  8. The roof drainage device (10) according to one of the above claims, characterised by the fact that the brim (28) comprises
    - an outer section (46) that faces radially outwards and is fundamentally horizontal when in the installation position and
    - an inner section (48) that is positiVoned radially inside the outer section (46) and abuts it and at an angle to the outer section (46).
  9. The roof drainage device (10) according to claim 8, characterised by the fact that the inner section (48) comprises
    - an expansion section (50) positioned on the emergency drainage pipe (26), the expansion section (50) being fundamentally horizontal when in the installation position and
    - a vertical section (52) connected to the expansion section (50) that is fundamentally vertical when in the installation position.
  10. The roof drainage device (10) according to one of the above claims, characterised by the fact that the emergency inflow device (16) comprises an air-tight cap (34) which
    - is arranged above the brim (28) and
    - has a cap diameter (DD) that is greater than the brim diameter (DK) of the brim (28).
  11. The roof drainage device according to one of the above claims, characterised by a dirt retention device that is designed in such a way that
    - it not only retains coarse dirt contained in the water which runs into the main drainage pipe (18),
    - but also coarse dirt contained in the water which runs into the emergency drainage pipe (26).
  12. The roof drainage device according to one of the above claims 5 to 11, characterised by the fact that elongated slots are arranged in the cap (34) which are greater in width than in height.
  13. A roof (12) that is designed
    - for the drainage of water that has collected on the roof (12) and is below an emergency drainage level (HN), and
    - for the emergency drainage of water that has collected on the roof (12) and is above the emergency drainage level (HN),
    characterised by a roof drainage system (10) according to one of the above claims.
  14. The roof (12) according to claim 13, characterised by the fact that the main inflow surface (30) is arranged at the same height as a water-tight roof surface (32).
EP20090002953 2008-03-03 2009-03-02 Roof drainage device Active EP2098657B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008012440A DE102008012440A1 (en) 2008-03-03 2008-03-03 Roof drainage device

Publications (3)

Publication Number Publication Date
EP2098657A2 EP2098657A2 (en) 2009-09-09
EP2098657A3 EP2098657A3 (en) 2013-03-20
EP2098657B1 true EP2098657B1 (en) 2014-06-04

Family

ID=40436345

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20090002953 Active EP2098657B1 (en) 2008-03-03 2009-03-02 Roof drainage device

Country Status (2)

Country Link
EP (1) EP2098657B1 (en)
DE (1) DE102008012440A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ2015541A3 (en) * 2015-08-05 2017-02-01 Topwet S.R.O. An assembly and a system for drainage of water from horizontal or sloped surfaces, in particular roof surfaces, from spaces above the waterproofing membrane
CN105525646B (en) * 2016-01-29 2017-11-14 济南轨道交通集团有限公司 The method that overhead road surface inlet for stom water collects rainwater installation and Collection utilization rainwater

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1013843B1 (en) * 1998-12-24 2003-08-20 Wolfgang Dipl.-Ing. Vahlbrauk Free-head water drainage
DE10201347C5 (en) * 2002-01-16 2017-06-01 Dallmer Gmbh & Co. Kg Inlet device for the discharge of rainwater from a roof
DE102004024904A1 (en) * 2004-05-19 2005-12-15 Wavin B.V. Water drainage for sealed flat surfaces
DE102005012439B4 (en) 2005-03-11 2010-09-09 Vahlbrauk, Wolfgang, Dipl.-Ing. water draining
DE102005012438B4 (en) * 2005-03-11 2010-09-09 Vahlbrauk, Wolfgang, Dipl.-Ing. water draining

Also Published As

Publication number Publication date
DE102008012440A1 (en) 2009-09-17
EP2098657A2 (en) 2009-09-09
EP2098657A3 (en) 2013-03-20

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