DE102008012440A1 - Roof drainage device - Google Patents

Abstract

The invention relates to a roof drainage device (10) for removing water from a roof (12), with
(A) main main inlet (14) for a main drain into a main drain pipe (18) having an orifice (24) and
(b) an emergency inlet device (16) for discharging water accumulated above a predetermined emergency drainage height (H _N ) via the outlet opening (24) by means of pressure flow into an emergency drainage pipe (26),
(i) whose free cross section is smaller than that of the main drain pipe (18) and
(ii) extends at least over part of its length within the cross section of the main drainpipe (18).
According to the invention, it is proposed that the main inlet device (14) comprises a rim (28) whose cross-section is at least as large as the mouth opening (24).

Description

The The invention relates to a roof drainage device for Discharging water from a roof, comprising (a) a main inlet device for a main drain into an orifice having main drain pipe and (b) an inlet device for Deriving from over a predetermined emergency drain height over the mouth of accumulated water by means of Pressure flow in an emergency drain pipe whose free cross-section is smaller than that of the main drain pipe and at least over a portion of its length within the cross section of the main drainpipe runs.

Such a roof drainage device is known from DE 10 2005 012 439 known. A disadvantage of such roof drainage devices is that the main drain pipe must be easily soiled and often cleaned, if the full drainage performance is to be maintained.

Of the Invention is based on the object, the known roof drainage device educate so that the main drainpipe cleaned less often must become.

The Invention solves the problem by a generic Roof drainage device, in which the main inlet device has a brim whose cross-section is at least as large like the mouth opening.

Advantageous at this roof drainage device is that the Water then when it is about the height of the emergency drain is present on the roof, a pressure flow in the main drain pipe formed. This creates a high flow rate, which entrains any dirt. With pollution the main drainpipe, the water is also higher in average on the roof, so the probability that grows a pressure flow forms. In other words, it comes it leads to a negative feedback in case of pollution the main drainpipe rather a cleaning occurs. You get such a substantially maintenance-free roof drainage device.

Advantageous is also that the water drains quietly, if the water level is about the height of the emergency drainage height has, because it due to the brim to no noisy tearing off the water flow comes.

It Another advantage of being at high water levels also forms a pressure flow in the main drain pipe, so that when there is a lot of water on the roof, the drainage of the Roof drainage device is particularly high. Advantageous is also that the roof drainage device according to the invention is simple and thus manufactured inexpensively can be.

By the brim is reached at a water level, which roughly corresponds to the emergency drainage height, also in the main drainage pipe a pressure flow forms what the discharge capacity the main drain pipe significantly increased. This increases overall the dissipation of the roof drainage device. The Brim is so arranged that, then, when water above the emergency drainage level is present, in the main drainpipe a pressure flow formed. This means that in the main drain pipe a essentially water column free of large bubbles forms, so that below the brim a negative pressure is applied.

Under the feature that the cross section of the brim is at least as large like the mouth opening, is to be understood in particular that the brim completely covers the mouth opening. So if the brim and the mouth opening, for example both circularly bounded and concentric one above the other are arranged, the rim diameter is at least as large as the Mouth diameter.

In a preferred embodiment has the main inlet device a main inlet surface through an inlet opening boundary goes into the mouth of the main drainpipe, wherein the rim in vertical projection, the inlet opening boundary completely overstretched. An advantage of this is that the pressure flow then, when the water level approximately equal to the emergency drainage height, especially can train well. This attains the roof drainage device Such water levels a particularly high dissipation.

Under the inlet opening boundary is in particular the transition from the horizontal main inlet surface to understood the inclined against the horizontal main drain pipe. In other words, the vertical projection encloses the Brim the mouth opening, more precisely the mouth opening boundary.

In A preferred embodiment provides that the main drain pipe upwards from a cylinder jacket Pipe section merges into a truncated cone-extended pipe section, whose upper end forms the mouth opening.

Preferably, a main drain pipe cross-sectional area of the main drain pipe is larger than an emergency drain pipe cross-sectional area of the emergency drain pipe. For example, the main drainpipe is transverse sectional area 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.

Prefers the brim forms an emergency inlet surface of the emergency inlet device, flush with the emergency drain pipe. In this case, the brim has two functions that complement each other.

According to one preferred embodiment comprises the emergency inlet device an airtight lid, one open at the bottom and otherwise airtight closed cavity forms and arranged above the brim is, wherein the lid has a lid diameter, which is smaller as a brim diameter of the brim. Particularly preferred the diameter of the mouth opening is smaller than the lid diameter and this in turn smaller than the rim diameter. It thus results in a particularly compact roof drainage device, the one with all possible water heights a special low noise.

It It is preferred that the brim in the installed position of the roof drainage device essentially horizontally. By this is meant that the brim does not run horizontally in the strict mathematical sense must, but small deviations of, for example, less than 5 ° tolerable are. The brim can have the shape of a flat disc. To this In this way, noises are suppressed particularly effectively. The brim can also be shaped convex and so one after form open at the bottom, airtight cavity.

Prefers the brim is essentially circular and edged has a diameter that is at least twice the diameter of the Main drainpipe is. This will be an education promoted a pressure flow effectively.

A especially easy to produce roof drainage device arises when the emergency drain pipe is cylindrical. Another advantage is that a cylindrical emergency drain pipe creates a pressure flow very effectively, so that a Drainage of the roof is always efficiently possible.

According to one preferred embodiment has the roof drainage device at least one outwardly extending guide elements for reducing or suppressing a radial flow in water, that in the main inlet device and / or the emergency inlet device enters. It can be two, three or a plurality be provided on guide elements, preferably in the same angular increments are arranged. This avoids eddies, especially in the water, which enters the main inlet device and forms it especially quickly a pressure flow in the main drain pipe out. The guide elements can, for example, baffles be.

Prefers has the brim a radially outer, in installation position essentially horizontally extending outer portion and a radially inwardly on the outer portion attaching, to Outside section on angled interior section. Thus, a pressure flow in the main drainpipe forms very quickly out.

These Brim is particularly easy to customize when interior section one attached to the emergency drain pipe, in installation position substantially horizontal extending widening portion and at the widening portion subsequent, in installation position substantially vertical having extending vertical section.

in the Following are exemplary embodiments of the invention explained in more detail with reference to the accompanying drawings. It shows

1 a cross section through a roof drainage device according to the invention,

2 a head portion of the roof drainage device according to 1 .

3 a cross section through a preferred roof drainage device according to the invention on a roof according to the invention,

4 a head portion of the roof drainage device according to 3 .

5 a detail of the roof drainage device according to 3 and 4 and

6 a cross section through the detail after 5 ,

1 shows a roof drainage device 10 for removing water from a roof 12 containing a main inlet device 14 and an emergency inlet device 16 has.

The main inlet device 14 includes a main drainpipe 18 , which has a cylinder jacket-shaped pipe section 20 has. The cylinder jacket-shaped pipe section 20 goes in a mouth section 22 in a mouth opening 24 over which has a mouth opening diameter D _M ( 2 ). The mouth section 22 goes in a kreisförmi Mündungsöffnungsberandung in a horizontally extending main inlet surface 30 above.

The emergency inlet device 16 is designed for draining over an emergency drain height H _N pending water and includes an emergency drain pipe 26 that has a diameter D _N. The emergency drain pipe diameter D _N is smaller than a main drain pipe diameter D _F (see. 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 _F = πD _F - πD _N , where A _{F is} more than twice AN, approximately three times in the present case.

The main inlet device 14 includes a horizontal brim 28 with a rim diameter D _K which is greater than the mouth opening diameter D _M. The brim 28 is so to the main inlet area 30 arranged that when the main inlet surface 30 at the height of a roof seal 32 is arranged, the brim 38 exactly on the emergency drain height H _N is. 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 in the main inlet device 14 forms a pressure flow when water is present above a pressure flow height H _D. The brim 28 For example, it is designed so that the pressure flow height H _{D is} below the emergency drainage height H _N.

2 shows that the emergency inlet device 16 also a lid 34 comprises, which has a substantially cylindrical shape, a lid diameter D _D has and concentric with the main drain pipe 18 and to the emergency drainpipe 26 is arranged. The lid 34 has a lid brim 36 , which runs horizontally and ends in a height H _D , which is greater than the emergency drain height H _N. Water that is higher than the emergency drainage height H _N , but below the lid rim height H _D , runs in the main drainage via the emergency inlet surface into the emergency drainage pipe 26 , Through the brim 28 the pressure flow is in the main drainpipe 18 stabilized.

Water, which is present above the lid rim height H _D , is from in a lidded dome 38 of the airtight lid 34 aspirated negative pressure, so that in the emergency drain pipe 26 forms a pressure flow. The negative pressure in the lidoma 38 arises from the fact that in the lid dome 38 existing air from that through the emergency drain pipe 26 entrained water is entrained. This corresponds to the principle of the water jet pump.

If the water is just below the lid rim height H _D , so can in the lid Dome 38 do not build up a stable negative pressure. 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 has a negative impact on the pressure flow in the main drain pipe 18 to have. Noise is effectively reduced.

If water is present above the emergency drainage height H _N , then the main drainage pipe is also used 18 Pending water with torn down, leaving through the brim 28 also sets a pressure flow there. The formation of the pressure flow is through the brim 28 supported.

In the vertical direction between the main inlet surface 30 and the emergency drain height H _N are equidistant Dirt retaining discs 40a . 40b and 40c 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 slices 40 prevent leaves in the main drainpipe 18 reach.

The roof drainage device 10 is by fasteners 42a . 42b . 42c at the roof 12 attached. The lid 34 is over three jetties 44 attached, of which in 2 only one footbridge is visible.

It is favorable if both the main drainpipe 18 as well as the emergency drainpipe 26 after a branch point open into a respective tube, the two resulting tubes have the same diameter.

3 shows a preferred embodiment of a roof drainage device according to the invention, in which the lid 34 is designed as a flat disc.

4 shows a head portion of the preferred embodiment of the roof drainage device according to 3 , It can be seen that the lid 34 is formed by a disc, for example 2 mm thick, which has a cover diameter D _D and all other components of the roof drainage device 10 spans. In contrast to the embodiment according to the 1 and 2 points the brim 28 a radially outer, in the installed position substantially horizontally extending outer portion 46 and a radially inward on the outer portion 46 Ansetzenden, the outer portion angled extending inner portion 48 on.

The interior section 48 again has one at the emergency drainage pipe 26 attaching, in the installed position substantially horizontally extending expansion section 50 and a to this expansion section 50 subsequent and in the final figure 2 shown installation position substantially vertically extending vertical section 52 , In other words, the brim is 28 designed radially trough-shaped inside, the emergency drain pipe 26 attaches to a trough bottom. Below that the outer section 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. It is rather possible that the outer section 46 forms a small angle with the horizontal of, for example, less than 5 °.

The interior section 48 does not necessarily have to be vertical. Under the feature that the interior section 48 angled to the outer section 46 runs, 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 are guiding elements 54.1 , ..., of which in 4 only the guide element 54.1 you can see.

5 shows a perspective view of the brim 28 with the guide elements 54.1 , ..., 54.6 in equidistant angular steps on the brim 28 are fixed and run radially outward. The guiding elements 54 have a height which is smaller by a small amount than a distance between an upper surface of the outer portion 46 and the main inlet surface 30 (see. 4 ). The guiding elements 54 prevent flow of the water in a circumferential direction around the emergency drain pipe 26 ,

6 shows a cross section through the brim 28 ,

10

Roof drainage device

12

top, roof

14

Main inlet device

16

Emergency inlet device

18

Main flow pipe

20

cylinder jacket shaped pipe section

22

mouth portion

24

mouth

26

Emergency drain pipe

28

brim

30

Main lead-in area

32

roof sealing

34

cover

36

cap brim

38

Deckeldom

40

Dirt retaining washers

42

fastener

44

web

46

outer portion

48

inner portion

50

expansion section

52

vertical section

54

vane

D _i

Inner diameter

D _M

Orifice diameter

D _N

Emergency drain pipe diameter

D _F

Main flow pipe diameter

D _D

Cover diameter

D _K

Kremp diameter

H _N

Notablaufhöhe

H _D

Kremp cover height

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 102005012439 [0002]

Claims (14)

Roof drainage device ( 10 ) for removing water from a roof ( 12 ), with (a) a main inlet device ( 14 ) for a main drain into an orifice ( 24 ) main drainpipe ( 18 ) and (b) an emergency inlet device ( 16 ) for discharging above a predetermined emergency drain height (H _N ) above the mouth opening ( 24 ) accumulated water by means of pressure flow in an emergency drain pipe ( 26 ), (i) whose free cross-section is smaller than that of the main drainpipe ( 18 ) and (ii) at least over part of its length within the cross-section of the main drainpipe ( 18 ), characterized in that (c) the main inlet device ( 14 ) a brim ( 28 ) whose cross-section is at least as large as the mouth opening ( 24 ). Roof drainage device ( 10 ) according to one of the preceding claims, characterized in that the main inlet device ( 14 ) a main inlet surface ( 30 ), which flows through an orifice opening into the mouth opening (FIG. 24 ) of the main drainpipe ( 18 ) goes over and the brim ( 28 ) in vertical projection completely spans the mouth opening boundary. Roof drainage device ( 10 ) according to one of the preceding claims, characterized in that a main drain pipe cross-sectional area of the main drain pipe ( 18 ) larger than an emergency drain pipe cross-sectional area of the emergency drain pipe ( 26 ). Roof drainage device ( 10 ) according to one of the preceding claims, characterized in that the brim ( 28 ) an emergency inlet surface of the emergency inlet device ( 16 ) and flush with the emergency drain pipe ( 26 ) completes. Roof drainage device ( 10 ) according to claim 4, characterized in that the emergency inlet device ( 16 ) an airtight lid ( 34 ) - a downwardly open and otherwise airtight cavity ( 38 ) and - above the brim ( 28 ) is arranged, - wherein the lid has a lid diameter (D _D ) which is at most as large as a rim diameter (D _K ) of the brim ( 28 ). Roof drainage device ( 10 ) according to one of the preceding claims, characterized in that the brim ( 28 ) in installation position of the roof drainage device ( 10 ) is substantially horizontal. Roof drainage device ( 10 ) according to one of the preceding claims, characterized in that the brim ( 28 ) is convex or convex. Roof drainage device ( 10 ) according to one of the preceding claims, characterized in that the brim ( 28 ) is substantially circularly bounded and has a rim diameter (D _K ) which is at least twice a main drain pipe diameter (D _F ). Roof drainage device ( 10 ) according to one of the preceding claims, characterized in that the emergency drain pipe ( 26 ) is cylindrical. Roof drainage device ( 10 ) according to one of the preceding claims, characterized by at least one radially outwardly extending guide element ( 54 ) for reducing a radial flow in the main inlet device ( 14 ) and / or the emergency inlet device ( 16 ) incoming water. Roof drainage device ( 10 ) according to one of the preceding claims, characterized in that the brim ( 28 ) - a radially outer, in the installed position substantially horizontally extending outer portion ( 46 ) and - a radially inward on the outer portion ( 46 ), to the outer section ( 46 ) angled inner portion ( 48 ) having. Roof drainage device ( 10 ) according to claim 11, characterized in that the inner section ( 48 ) - one at the emergency drain pipe ( 26 ), in the installation position substantially horizontally extending expansion section ( 50 ) and - a to the widening section ( 50 ) subsequent, in the installed position substantially vertically extending vertical section ( 52 ) having. Top, roof ( 12 ), which is designed - for a main process on the roof ( 12 ) below an emergency drainage height (H _N ) of dammed up water and - for an emergency drainage on the roof ( 12 ) above the emergency drainage height (H _N ) of dammed water, characterized by a roof drainage device ( 10 ) according to any one of the preceding claims. Top, roof ( 12 ) according to claim 13, characterized in that the main inlet surface ( 30 ) at the same height as a sealing roof surface ( 32 ) is arranged.