EP2146020B1 - Drainage device with a pipe conduit led through a roof edge - Google Patents

Abstract

The device has a pipe line (9) through which water flows by an edge termination (2) closing a surface (1) to be drained. The pipeline is switched to a side (13) of the edge termination in a vertical downpipe (19). An accumulation container (15) communicating with the downpipe is formed in a region of entry of the pipeline in the downpipe. An emergency discharge device is arranged in the accumulation container to discharge water such that water exceeds accumulation height in the container. The discharge device is drained as a pressure flow device with a vertical downpipe.

Description

The invention relates to a drainage device with a draining water through a pipe leading to a surface to be drained edge to be drained, which merges on the relative to the surface to be drained surface of the edge termination in a substantially vertical downpipe.

EP 0 940 520 A2 discloses a drain device according to the preamble of claim 1.

The task of dewatering a surface through an edge termination, arises in particular in the water dissipation of roofs, in particular flat roofs, which have only a slight inclination relative to the horizontal. Similar problems arise in the drainage of balconies, terraces o.

In particular, if the area to be drained, as is usually the case, has only a slight inclination with respect to the horizontal, the water can accumulate on the surface to be drained and statically burden a possibly existing substructure of the area to be drained. In order to keep the static load, for example of a building with a flat roof, within harmless limits, the water drainage from the area to be drained must be dimensioned so as to prevent excessive accumulation of water on the surface. Accordingly, a downpipe with a nominal diameter must be provided for the drainage device, which guarantees such a high drainage capacity that an excessive accumulation of water on the surface to be drained is prevented even in heavy rain.

Since the downpipe is located on the outside of the edge termination and extends in the drainage of a flat roof or a balcony along the building facade, there is a great need for architectural reasons to keep the size of the downpipe small in order to realize an aesthetically pleasing solution with the downpipe to be able to.

It is therefore known to dimension drainage devices for draining a surface so that they can be overloaded in unusual cases, for example in heavy rain. Nevertheless, in order to avoid too high damming of the water on the surface to be drained, emergency drains are provided which prevent the further increase of the water with high drainage capacity. As such emergency drain devices Druckströmeinrichtungen are known, which are often not applicable as a normal process because of the noise generated during the pressure flow noise. As emergency processes, it is also possible to provide mere overflow devices, via which the accumulated water can fall more or less undirected on the outside of a building or the like. However, such a solution is usable only in exceptional cases because of the nuisance of people in the vicinity.

By DE 10 2005 012 439 A1 It is also known to guide a smaller sized tube of a pressure flow device within the vertical downpipe of a Freispiegelablaufes, so that only a single tube is visible to the outside.

The attachment of additional emergency drainage devices on the surface to be drained require increased effort, which is not accepted in many cases. This then leads to a realization of architecturally unsightly solutions.

The present invention has for its object to form a drainage device for draining a surface through an edge termination so that an architecturally appealing solution is made possible without the additional effort for additional processes on the surface to be drained.

This object is achieved with a drain device of the type mentioned above in that in the downpipe a communicating with the downpipe Anstaubehälter is formed in the region of the inlet of the pipe, in which an emergency drain device is arranged so that it is discharged through them, the one Accumulation height in the stowage container exceeds.

The drainage device according to the invention thus provides an emergency drainage device, which is not arranged on the surface to be drained, but in the region of the inlet of the pipeline into the drainage pipe. For the training of the emergency drainage device thus no intervention in the construction of the area to be drained, such as a roof construction, is required. Accordingly, eliminates the need for further implementation of a pipe through the edge termination of the area to be drained. With the emergency drain device, the connection of a further Wasserabführleistung is ensured in the event that the normal drainage device, which usually takes place in a free-flow drain, is insufficient to dissipate an unusual water attack, for example in heavy rain.

The additional Wasserabführleistung can be realized by a suitably trained overflow of the Anstaubehälters. However, it is preferred that the emergency drain device is designed as a pressure flow device with a vertical drain pipe. In the pressure flow device, the vertical drain pipe is dimensioned so that it quickly filled by the running water with a water-air column, which leads by its weight at the upper end of the drain pipe to a negative pressure, through which an increased drainage capacity is available. The noise occurring thereby occurs only in an emergency, when the emergency drain device comes into operation, while normally the drainage is possible with low noise with a commonly used free-flowing drain.

The vertical drainage pipe of the emergency drainage device can be arranged as a separate drainage pipe next to the vertical downpipe. However, an embodiment is preferred in which the vertical discharge pipe of the pressure-flow device is guided at least over a partial section within the cross-section of the drop tube and provided with an outlet opening leading to the outside of the drop tube. Through the mouth, the discharged through the emergency drainage water passes directly into the open and therefore effectively discharged from the surface to be drained even when the water flow through the vertical downpipe into the sewer system is delayed by overloading.

Similarly, the drainage of water from the surface to be drained would also occur if another type of emergency draining device, for example in the form of an overflow, is used.

The arranged in the Anstaubehälter pressure flow device preferably has a drain pot having above a floor at least one inlet opening and above the inlet opening a space which is hermetically sealed after closure of the inlet opening by dammed water. Such a drain pot ensures an improved start of the pressure flow when rising of the water level in the Anstaubehälter and for a lower noise by the pressure flow, in particular when the pressure flow. A pressure flow device with such a drain pot is through DE 198 60 160 C2 known.

The downcomer expediently adjoins the bottom of the potting container in the case of the downflow device according to the invention. The Anstaubehälter preferably has in an upper side an opening which causes a pressure equalization with the ambient pressure in the Anstaubehälter. This avoids the creation of a negative pressure in the stagnation container, which would otherwise exert a counterforce to the drainage of the water in the pressure-flow device. The opening can be formed by a sieve to prevent the ingress of coarse dirt particles, leaves o. The like. In particular, a cover wall of the Anstaubehälters may be formed as a sieve.

Figur 1

einen Schnitt durch den Randbereich einer Dachfläche eines Ge- bäudes, von der Wasser durch einen Randabschluss hindurch ab- geleitet wird;

Figur 2

eine vergrößerte Schnittdarstellung eines erfindungsgemäß vorge- sehenen Anstautopfes mit einer Notablaufvorrichtung.

Figur 1 zeigt eine zu entwässernde Fläche 1 in Form eines Flachdaches, das durch einen Randabschluss 2 umlaufend begrenzt ist. Die schematische Schnittdarstellung zeigt eine tragende Wandkonstruktion 3, die eine Dachwand 4 und eine Seitenwand 5 bildet und beispielsweise aus Beton bestehen kann. Über der Dachwand 4 ist schematisch eine Isolierschicht 6 dargestellt, auf der üblicherweise eine (nicht näher dargestellte) Dachfolie zur Ausbildung der zu entwässernden Fläche 1 aufgebracht ist. Am Rand der zu entwässernden Fläche 1 befindet sich eine Ablaufeinrichtung 7, die in üblicher Weise einen in die Isolierschicht 6 eingelassenen Ablaufkasten 8 und ein daran angeschlossenes, durch den Randabschluss 2 hindurchgeführtes Rohrstück 9 aufweist.The invention will be explained in more detail below with reference to an embodiment shown in the drawing. Show it:

FIG. 1

a section through the edge region of a roof surface of a building, is derived from the water through an edge termination therethrough;

FIG. 2

an enlarged sectional view of an inventively provided jam pot with an emergency drain device.

FIG. 1 shows a surface to be dehydrated 1 in the form of a flat roof, which is bounded by a peripheral edge 2 circumferentially. The schematic sectional view shows a load-bearing wall construction 3, which forms a roof wall 4 and a side wall 5 and can be made of concrete, for example. Over the roof wall 4, an insulating layer 6 is schematically shown, on which usually a (not shown) roofing film for forming the surface 1 to be dewatered is applied. At the edge of the area to be drained 1 is a drain device 7, which has in the usual way a recessed into the insulating layer 6 drain box 8 and connected thereto, passed through the edge termination 2 pipe section 9.

The edge termination 2 consists of the upwardly over the roof wall 4 also extended side wall 5, which is provided to be drained surface 1 also with an insulating layer 10 and a waterproof surface 11 forming roof liner. The pipe section 9 is guided through the edge termination 2 within an insulation 12 and ends on an outer side 13 of the building, on which the side wall 5 is covered with a facade layer 14. The facade layer 14 usually consists of an insulating layer and a plaster layer, but of course, other facade elements, such as clinker, curtain wall panels, etc. have.

On the outside 13, the pipe piece opens sealed into a cylindrical Anstaubehälter 15, which has a bottom 16, a casing wall 17 and a top wall 18. The floor 16 is adjoined by a vertical downpipe 19, which extends down the side wall 5 of the building and is usually connected there to a connection (not shown) to a rainwater duct (not shown). The drop tube may be made of metal or plastic and is preferably surface treated to meet architectural requirements.

The bottom 16 of the Anstaubehälters 15 is located below the pipe section 9, the cover wall 18, however, above the pipe section 9. The bottom 16 has a drain opening 20, which corresponds to the inner cross section of the downpipe.

Within the drop tube 19 and the Anstaubehälters 15, a vertical drain pipe 21 is guided with respect to the downpipe 19 much smaller nominal diameter. The vertical drainage pipe 21 is connected to a pipe socket 22 which is located at a bottom 23 of a drain pot 24 in a centric arrangement. The bottom 23 of the drain pot 24 is located immediately above the opening in the Anstaubehälter 15 pipe section 9. The drain pot 24 is cylindrical with a round cross section and has a cylindrical jacket wall 25 and a top wall 26. In the cylindrical jacket wall 24 are inlet slots 27 which extend from the bottom 23 upwards over part of the jacket wall 24 and together form an inlet opening 28 which extends from the bottom 23 to about half the height of the drain pot 24 and only by webs 29 may be interrupted between the inlet slots 27.

The vertical drainage pipe 21 extends downwardly within the downpipe 19 and preferably ends above a bottom edge 30 of the building in which a curved mouthpiece 31 is connected to the vertical drainage pipe 21 is, with which the vertical drainage pipe 21 is passed through the wall of the drop tube 19, so that the discharged through the vertical drain pipe 21 water is passed through the mouth piece 31 into the open and can seep, for example, in a formed on the bottom edge 30 drainage or a loose soil ,

The drop tube 19 has in the pipe wall below the Anstaubehälters 15 air inlet slots 32 which are shielded by an inner skirt piece 33 to the inside, so that no water can escape through the air inlet slots 32. The ventilation through the air inlet slots 32 ensures that in the downpipe 19 no unwanted pressure flow can form, but that a desired quiet free-flow drainage is ensured.

The downpipe 19 is dimensioned so that it dissipates the water from the surface to be dewatered 1 in a free-flow drain in a sufficient manner in normal use. In the case of a particularly large water attack, as occurs in a heavy rainfall, or a failure of the drain through the downpipe 19, for example, by a clogging of the rainwater duct to which the downpipe 19 is connected, the water accumulates in the downpipe 19 into the Dust container 15 inside. If the water level in the Anstaubehälter 15 exceeds the height of the bottom 23 of the drain pot 24, the water passes through the inlet opening 28 forming inlet slots 27 into the drain pot 24 and is discharged through the vertical drain pipe 21 and passes through the mouth piece 31 into the open. Since the vertical drainage pipe 21 has a small nominal diameter, it fills up quickly with a water-air column, whereby a negative pressure at the upper end of the vertical drain pipe 21, ie in the interior of the drain pot 24, arises. If the water level in the Anstaubehälter 24 has risen so that the inlet opening 28 is closed by the dammed water, resulting in the interior of the drain pot 24 negative pressure leads to increased water discharge in the form of a pressure flow. The "starting" of the pressure flow is through a in a space 34 above the filler opening 28 acoustically dampens existing air cushion. In addition, as the air cushion decreasing in operation causes a calming of the forming pressure flow from the Anstaubehälter 15 via the interior of the drain pot 24 into the vertical drain pipe 21 into it.

The illustrated construction shows that the emergency drainage device, which leads to the formation of the pressure flow, is not effective in normal operation, namely, when the water in the Anstaubehälter 15 does not rise to the bottom 23 of the drain pot 24. Only when a significant increase beyond occurs, the emergency drainage device comes into operation, which leads in the illustrated embodiment via the drain pot 24 and the airtight connected and airtight formed vertical drain pipe 21 to form a pressure flow.

The remaining drainage device 7 is thus according to the invention formed by the attachment of the Anstaubehälters 15 and the emergency drainage device mounted therein so that in addition to the usual gravity drainage performance, a sudden increase in the drainage capacity is provided by the emergency drain device.

Claims (8)

1. Drain device comprising a pipe conduit (9) which leads outflowing water through an edge closure (2) which closes off a surface (1) to be drained, said pipe conduit passing into a substantially vertical downpipe (19) on that side (13) of the edge closure (2) situated externally with respect to the surface (1) to be drained, wherein an accumulation container (15) which communicates with the downpipe (19) is formed in the region where the pipe conduit (9) enters the downpipe (19), characterized in that an emergency drain device is arranged in the accumulation container (15) in such a way that water which exceeds an accumulation height in the accumulation container (15) is discharged through said emergency drain device.
2. Drain device according to Claim 1, characterized in that the emergency drain device is designed as a pressure flow device with a vertical drainpipe (21).
3. Drain device according to Claim 2, characterized in that the vertical drainpipe (21) of the pressure flow device is guided, at least over a section, within the cross section of the downpipe (19) and is provided with a mouth opening (31) leading to the outside of the downpipe (19).
4. Drain device according to Claim 2 or 3, characterized in that the pressure flow device comprises a drain cup (24) which is provided, above a base (23), with at least one inlet opening (28) and, above the inlet opening (28), with a space (34) which is closed off in an air-tight manner after the closure of the inlet opening (28) by accumulated water.
5. Drain device according to one of Claims 1 to 4, characterized in that the downpipe (19) is connected to a base (16) of the accumulation container.
6. Drain device according to one of Claims 1 to 5, characterized in that the accumulation container (15) is provided in an upper side with an opening which produces pressure equalization with the atmospheric pressure in the accumulation container (15).
7. Drain device according to Claim 6, characterized in that the opening is formed by a screen.
8. Drain device according to Claim 7, characterized in that the accumulation container (15) has a cover wall (18) formed as a screen.

Images