KR20110107738A

KR20110107738A - Roof drainage device

Info

Publication number: KR20110107738A
Application number: KR1020110015493A
Authority: KR
Inventors: 압둘라 오엔괴렌
Original assignee: 게베리트 인터내셔널 아게
Priority date: 2010-03-25
Filing date: 2011-02-22
Publication date: 2011-10-04
Also published as: EP2369088B1; CN102199942A; AU2011200482A1; EP2369088A1; KR20180005732A; AU2011200482B2; PL2369088T3; CN106567506A; DK2369088T3

Abstract

The device of the invention comprises an inlet 3 comprising an opening capable of draining water. The cover 10 forms an annular passage 9 through which water to be discharged can flow. The one or more noise damping elements 16 to 25 introduce air into the runoff when subjected to a predetermined load or more, so that the intake of air through the annular passage 9 is reduced. As a result of the introduced air, the flow in the inlet 3, in particular the drain pipe 6, is stabilized, even at partial load, so that the noise generated by the turbulence and vibration can be reduced.

Description

Roof drainage {ROOF DRAINAGE DEVICE}

The present invention provides an inlet including an opening through which water to be discharged can flow, a cover defining an annular passageway through which water to be discharged can flow, and at least one noise attenuation projecting into the inlet. A roof drainage device comprising a noise-reducing element.

Such roof drainage devices have long been known and used, particularly for drainage of flat or gently sloped roofs. The cover forming the annular passage allows for so-called closed flow. This closed flow generates the suction effect and thereby the desired high capacity. Inhalation effects require full-filling of pots and drains. However, such a full charge condition is a special case and occurs during heavy rain. As in the prior art, reference is made, for example, to FI 58193, US 4,683,685, WO 95/15423 and EP 1 203 851.

At average rainfall and hence partial load conditions, a large amount of air is drawn into the running water through the annular passageway. These large amounts of air are sucked into run-off pipes. The large amounts of air form relatively large bubbles, which are heterogeneously mixed with water, resulting in highly turbulent chaotic two-phase flow, which is a very serious cause of failure throughout the system. The abnormal flow not only degrades the performance of the system, but also generates very loud noise. As mentioned, noise shaping associated with such devices is a significant problem, since the part-fulling state occurs much more frequently than the full charge state.

In order to reduce noise, EP 1 160 390 proposes to install a connecting branch at the bottom of the cover which can prevent cross-sectional expansion of the inlet of the intake funnel. Accordingly, it is known that it is possible to reduce the inflow of air and to reduce the gurgling noises when water flows. In addition, a number of radially extending water-conducting elements are presented which can prevent turbulence and ensure the fastest possible outflow of water.

EP-A-1 607 542 discloses a roof water inlet in which the run-off capacity is controlled by a float valve. Accordingly, it is known that runoff noise and mechanical load can be lowered.

It is an object of the present invention to provide a device of this type which can significantly reduce noise formation at least at part load. This object is achieved according to claim 1.

One or more noise dampening elements of the general type of device are configured to deliver air to the flowing water in a desired position at predetermined or higher loads so that the inflow of air through the annular passage is reduced. Transferring air through one or more noise dampening elements makes it possible to substantially prevent or at least reduce the ingress of air through the annular passageway under partial load. Furthermore, with one or more noise dampening elements, the vortex flow rate when entering the drain can be substantially reduced at full load as well as at partial load. As a result, the water flow can be fairly stable.

The one or more noise damping elements can be implemented in a very simple and cost effective manner by a tube comprising an upper air intake opening and a lower air outlet opening. The air intake opening may preferably be arranged inside or on the cover. The air outlet opening may preferably be located in the drain pipe. In particular, the one or more noise damping elements can be configured in the form of rods, and because the outer diameter is relatively small, the cross section of the drain pipe is not significantly reduced.

According to one embodiment of the invention, one or more noise damping elements are fixed on the cover, in particular on the cover. In this case, the noise damping element can be easily lifted from the inlet together with the cover and can be easily cleaned. As a result, easy mounting and checking are ensured.

According to one embodiment of the invention, the air outlet opening and / or the air intake opening is of sieve type. By this, the inflow of air can be optimally handled. Therefore, air may be introduced in a finely distributed form such as fine bubbles. It has been found that a sieve-type air outlet opening can significantly reduce noise. Thereby, it is possible to transfer the fine bubbles into the water and effectively prevent the two-phase turbulent flow. In addition to the sieve-type air outlet openings and / or the sieve-type air intake openings, additional openings may be envisioned in one or more noise dampening elements. These openings may be circular or even elliptical.

Also, in theory, it is conceivable that an embodiment is provided where two or more such noise damping elements are provided. However, preferably only one such noise damping element is arranged substantially in the middle part. While conceivable removable or movable fastenings may be envisioned, the noise damping element is preferably securely fastened to the cover.

On the outer surface of the at least one noise damping element, the cover is preferably closed. As a result, air can only enter the inlet port through the at least one noise damping element and the annular passageway. However, due to the above effects, air is mostly introduced through one or more noise dampening elements.

According to one embodiment, the inlet consists of a pot through which water to be discharged can be collected. However, one may think of an inlet without such a port. The inlet can for example be configured according to WO 83/03114.

Another preferred feature is revealed in the dependent claims, the following detailed description and the figures.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 shows a longitudinal section of a device installed on a roof.
FIG. 2 shows a longitudinal section according to FIG. 1 with one or more noise damping elements omitted to more clearly explain the effect of the device of the invention. FIG.
3A-3C, 4A, 4B and 5A-5E show views of various embodiments of one or more noise dampening elements.

The device 1 shown in FIG. 1 consists of an inlet pot and is installed on the roof 14 (shown briefly in this figure) for discharging water 2 from the roof top 15. And an inlet 3. The inlet 3 comprises a circumferential collar 8 extending substantially radially outward in the plane of the roof top 15. On the inlet 3, a disc-shaped cover, for example comprising a circumferential rim 42 and extending substantially horizontally at a predetermined distance from the circumferential collar 8 ( 10) is arranged. The disc shaped cover 10 is fixed by means (not shown in this figure) such that the gap between the circumferential collar 8 and the circumferential edge 42 of the cover 10 is maintained. On the disc shaped cover 10 a standard leaves filter (not shown in this figure) can be arranged. This standard Lips filter prevents the annular passage 9 between the circumferential collar 8 and the disc shaped cover 10 from being blocked and prevents the leaves from entering the inlet 3, for example.

The inlet 3 forms a trough inside 13 through which water flows in the direction of the arrow 37 under the cover 10. This water flows into the drain pipe 6 which extends below the lower surface 7 of the inlet 3. This drain pipe 6 finally leads to a discharge opening (not shown in this figure) through which water flows out. Therefore, the water 2 to be discharged first flows through the upper opening 4 toward the trough inside 13 and into the drain pipe 6 through the narrower and lower lower opening 5. During heavy rains, so-called full-filling occurs, at which time a siphoning effect occurs in the flow direction of the inlet 3, thereby increasing the capacity. Constantly continuous inhalation effects occur at about 70% of maximum capacity. According to FIG. 2, in case of a small amount of heavy rain, air is introduced through the annular passage 9 in addition to the water 2. Therefore, the highly turbulent chaotic two-phase flow 38 shown in FIG. 2 is formed in the drain pipe 6. This is a cause of a very serious problem, which not only degrades the performance of the device 1 ', but also generates relatively loud noise. This highly turbulent chaotic anomaly 38 could be observed in particular in the range of 50% to 70% of the maximum capacity.

In the device 1 ′ shown in FIG. 2, the cover 10 ′ is constructed according to the prior art. Unlike the device according to FIG. 2, the device 1 of the invention according to FIG. 1 is fastened to the cover 10 and comprises an air intake opening 26 at the top and an air outlet opening 39 at the bottom 16b. And a noise damping element 16, leading to the duct 27. Thus, the duct extends over the entire length of the noise damping element 16. The lower end 16b, ie the air outlet opening 39, is located in the drain pipe 6. As can be seen, the air intake opening 26 is located above the top surface 11 of the cover 10. However, the air intake opening 26 may be arranged in the plane of the upper surface 11 or even below it. Importantly, air can enter the duct 27 from the outside through the air intake opening 26.

The noise attenuation element 16 sucks air through the air intake opening 26 of the drainage passage of the roof 14 according to FIG. 1, through which the air is drained in the form of a bubble 36 through the air outlet opening 39. (6) has the effect of discharging into water. Thus, the inflow of air in the annular passage 9 is substantially reduced. Thus, substantially only water flows into the trough interior 13 through the annular passage 9. This has the effect of preventing highly turbulent chaotic anomalous flow 38 due to the corresponding negative effects even at partial load, so that the flow of water in the drain pipe 6 is made in a substantially more stable and quiet manner. As a result, the flow in the trough interior 13 is also substantially less turbulent and more stable. This stabilized flow of water produces correspondingly little vibration in the inlet 3 and the drain pipe 6, which also affects the noise attenuation. The lower end 16b of the noise damping element 16 is preferably located in the drain pipe 6. Preferably, the lower end length located in the drain pipe 6 is at least 10%, preferably at least 20% of the total length of the noise damping element 16.

The noise damping element 16 may be embodied in a tube of simple construction. The corresponding noise damping element 16 is shown in FIG. 3A. To fasten the noise damping element 16 in the cover 10, the cover 10 includes a continuous bore 40 into which the noise damping element 16 is inserted and fixed.

3b shows a variant of the noise damping element 17 in which a plurality of openings 28 are also formed on the side, through which air can be discharged. In the case of the noise damping element 18 according to FIG. 3c, a corresponding opening 29 is arranged in the lower region of the noise damping element 18. According to FIG. 1, relatively small bubbles 36 can be delivered to the effluent through the openings 28, 29. As a result, the desirable inhalation effect does not decrease.

4A shows a noise damping element 19 that includes a number of small sieve-like openings 30 at the lower end 32 instead of one air outlet opening 39. Through these openings 30, air flowing through the noise damping element 19 can be delivered in the form of small bubbles 36, as particularly intended. As a result, the frequency of the sound was increased and the noise was generated in the high frequency region through the measurement. Such noise is less disturbing than known gurgling noises with relatively low frequencies. Thus, on the one hand, noise formation is reduced, while on the other hand, the frequency is increased.

The lower end 32 may be, for example, hemispherical. According to FIG. 4B, the noise damping element 20 comprises a lower end 33, tapered in a downward conical shape, configured in a transmissive sheave shape and comprising a relatively small number of relatively small air outlet openings 31.

5A to 5E show the noise damping elements 21 to 25 which are further formed at the upper end with openings 41 for inhaling air, respectively. Thus, the upper end here is also of a sheave type. In the case of the noise damping elements 24, 25, further openings 34 for air exhaust are also formed on the sides. The upper end and the lower end may be configured, for example, in hemispherical or conical shape.

1 device 2 water
3 inlet 4 upper opening
5 Lower opening 6 Drain
7 colors 8 colors
9 annular aisle 10 covers
11 Top 12 Bottom
13 inside 14 roof
15 Roof Top 16 to 25 Noise Reduction Elements
16a upper part 16b lower part
26 Air intake opening 27 Duct
28 opening 29 opening
30 opening 31 air exhaust opening
32 Lower part 33 Lower part
34 opening 35 opening
36 Bubbles 37 Arrows
38 Two-phase flow 39 Air vent opening
40 bore 41 opening
42 rims

Claims

An inlet 3 comprising an opening 4 through which water to be discharged can flow, a cover 10 defining an annular passage 9 through which water to be discharged can flow, and the In the roof drainage device comprising at least one noise-reducing element 16 to 25 protruding into the inlet 3,
The one or more noise damping elements 16 to 25 introduce air into the running water flowing in the inlet 3 during the drainage process, thereby reducing the inflow of air through the annular passage 9,
Roof drainage.

The method of claim 1,
The at least one noise damping element (16 to 25) is disposed on the cover (10).

The method according to claim 1 or 2,
A roof drainage device in which the lower end (16b) of the at least one noise damping element (16 to 25) is arranged in the drain pipe (6).

4. The method according to any one of claims 1 to 3,
The at least one noise damping element (16 to 25) comprises at least one upper air intake opening (26) and at least one lower air outlet opening (31).

The method of claim 4, wherein
The air intake opening (26) is located in or on the cover (10).

The method according to claim 4 or 5,
The air drain opening (31) and / or the air intake opening (26) is of a sieve shape.

The method according to any one of claims 1 to 6,
The one or more noise damping elements 16 to 25 comprise a plurality of openings 28, 29, 34, 35 between the upper end 16a and the lower end 16b, through which the air sucked in through the opening is introduced. (3) roof drainage, which can be discharged.

The method according to any one of claims 1 to 7,
The at least one noise damping element (16 to 25) is configured in an elongated shape.

The method according to any one of claims 1 to 8,
The at least one noise damping element (16 to 25) is tubular, roof drainage.

The method according to any one of claims 1 to 9,
The at least one noise damping element (16 to 25) comprises a continuous air duct open for air intake in or on the cover (10).

The method according to any one of claims 1 to 10,
At least 10%, preferably at least 20%, of the length of the at least one noise damping element (16 to 25) is arranged protruding into the drain pipe (6).

The method according to any one of claims 1 to 11,
Outside the at least one noise damping element (16 to 25), the cover (10) is closed.

The method according to any one of claims 1 to 12,
The cover (10) is of a disc shape and the rim (42) of the cover (10) protrudes laterally past the upper opening (4) of the inlet (3).

The method according to any one of claims 1 to 13,
The inlet (3) comprises a collar (8) extending in the horizontal direction, the cover (10) is arranged on the collar (8) at a predetermined interval, the roof drainage device.

The method according to any one of claims 1 to 14,
The inlet (3) consists of a pot comprising a bottom with a bottom opening (5), the roof drainage device.