ES2367486T3 - EVACUATION DEVICE FOR A CORRESPONDING LIQUID AND GUIDE DEVICE FOR LIQUID. - Google Patents

Abstract

Evacuation device for a liquid, especially water, rainwater, of the type that comprises an evacuation pipe (6) that extends along an axis (XX) and forms an evacuation inlet (12), a collecting container (8 ) which extends around the evacuation inlet (12) and is provided with a collar (16), and a liquid guiding device (10) comprising a cover plate (20), the cover plate comprising ( 20) a solid central zone (22) that covers the evacuation inlet (12), the covering plate (20) also comprising a peripheral zone (24) that surrounds the central zone (22) and which extends in front of the collar (16), the evacuation device being characterized by the fact that, in the peripheral zone (24) at least one evacuation opening (26) of the liquid delimiting an edge (30) is arranged, and by the fact that for each opening (26) at least one element of guiding (40) of liquid in the annular space between the cover plate (20) and the collar (16), which extend the guiding element (40) along a part of the edge (30) and comprising a radial branch (44) extending substantially radially with respect to the axis (XX) of the evacuation pipe (6) and a circumferential branch (48) extending to the radial branch (44) and extending substantially circumferentially with respect to the axis (XX), of the evacuation pipe (6).

Description

[0001] The present invention relates to an evacuation device for a liquid, especially rainwater, of the type comprising an evacuation pipe that extends along an axis and forms an evacuation inlet, a collecting vessel extending around of the evacuation inlet and which is provided with a collar, and a liquid guiding device comprising a cover plate, the cover plate comprising a solid central area covering the evacuation entrance.

[0002] It applies especially to storm drain systems installed on horizontal and / or sloping roofs.

[0003] Document FR-A-2 337 237 describes a water evacuation device that is provided with an anti-vortex device. This anti-vortex device is constituted by a cylindrical wall provided with a plurality of water intake openings. The upper end of the cylinder is sealed by a solid circular plate in order to prevent the entry of air into the evacuation pipe. The diameter of the cylinder is greater than the diameter of the evacuation pipe.

[0004] Document GB-A-2,269,402 describes a water evacuation device provided with an anti-vortex device and a filtering grid. The anti-vortex device comprises three walls arranged radially in an evacuation vessel as well as a substantially cone-shaped plate disposed above the inlet of the evacuation pipe.

[0005] Another water evacuation device is known from document FR-A-2 747 144. This device comprises an anti-vortex device provided with fins arranged radially with respect to the axis of the evacuation pipe. US-A-4652365 describes a device for evacuating a liquid according to the preamble of claim 1 and a device for guiding a liquid according to the preamble of claim 16.

[0006] The aforementioned liquid evacuation devices have a reduced flow rate for certain dimensions. In addition, they are difficult to manufacture and have a high cost price, especially due to the many pieces of which they are constituted.

[0007] Based on this state of the art, the invention aims to propose a liquid evacuation device having a significant flow of liquid for certain dimensions.

[0008] For this purpose, the object of the invention is a liquid guiding device according to the statement of claim 16 and an evacuation device of the aforementioned type, according to the statement of claim 1, which comprises said guiding device .

[0009] According to particular embodiments, the assembly according to the invention comprises one or more of the following characteristics:

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 two liquid guiding elements are provided for each opening in the annular space between the cover plate and the collar and extend along a part of the edge, on each circumferential side of the evacuation opening, and each guiding element it comprises a radial branch that extends substantially radially and a circumferential branch that extends to the radial branch and extends substantially circumferentially with respect to the axis XX of the evacuation pipe;

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 the circumferential branch of the or of each guide element extends the radial branch on the radially inner side;

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 the length of the radial branch is substantially identical to the length of the circumferential branch;

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 the guiding elements extend from the surface of the cover plate to the surface of the collar;

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 the evacuation opening is oblong in shape whose circumferential extension is greater than the radial extension;

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 the cover plate comprises at least two, preferably three, evacuation openings;

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 The cover plate comprises filtering means disposed on the side of the plate opposite the collecting container, and which extends above the or each evacuation opening;

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 the filtering means comprise ribs that extend radially with respect to the axis of the evacuation pipe;

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 the ribs have a radial width that is greater than a radial width of the evacuation opening, especially between 1.5 and 2.5 times the radial width of this opening;

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 the ribs have an axial height that is greater than an axial height of the guiding elements of the liquid, especially between 1.5 and 4 times this height;

-the ribs comprise open cells towards the evacuation opening, especially circumferentially through;

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 the ribs comprise lateral ribs, which are ribs located at the circumferential ends of the evacuation openings, and the lateral ribs comprise alveoli whose axial height is less than the axial height of the other alveoli;

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 a radial passage of unfiltered liquid extends between two evacuation opening ends to allow a circulation of liquid towards the central zone; Y

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 the liquid guiding device and the or each liquid guiding element are made of a single piece, preferably of a single piece and especially by molding.

[0010] The invention will be better understood by reading the following description, offered by way of example only and made with reference to the accompanying drawings, in which:

- Figure 1 is a broken axial section view along the line I-I of Figure 2 of a water evacuation device according to the invention;

FIG. 2 is a plan view of the evacuation device according to the invention;

Figure 3 is a view from below of the liquid guiding device of the device according to the invention; Y

-Figure 4 is a perspective view of the guiding device of Figure 3.

[0011] A liquid evacuation device, designated by general reference 2, is shown in Figure 1.

[0012] The device 2 is installed on a roof 4 horizontal or reduced slope of a building, and serves to evacuate rainwater that accumulates on top of this roof, when they exceed a first level N1.

[0013] The device 2 comprises an evacuation pipe 6, a collection vessel 8 and a liquid guiding device 10.

[0014] The evacuation pipe 6 extends vertically, along a vertical X-X axis, and delimits, at its upper end, a circular evacuation inlet 12 of diameter D1.

[0015] In the following, the terms "axial", "radial", and "circumferential" will be used with respect to the X axis

X.

[0016] The collecting vessel 8 comprises a cuvette 14. The evacuation inlet 12 flows into the center of the bottom of the cuvette 14. A collar 16 is connected to the upper edge of the cuvette 14. The collar 16 extends to level N1 and it forms an annular surface, which has an inner diameter D2 and an outer diameter D3.

[0017] Three threaded rods 18 protrude from the surface of collar 16, on the opposite side of the pipe 6.

[0018] The pipe 6 and the collecting vessel 8 are of revolution around the X-X axis.

[0019] The guiding device 10 serves to guide the water through the evacuation inlet 12 without inclusion of air and to retain impurities, such as leaves.

[0020] The guiding device 10 comprises a circular flat cover plate 20. It extends perpendicular to the X-X axis at a level N2. The diameter of the plate 20 is identical to the outer diameter D3 of the collar 16. The plate 20 is separated from the collar 16 a distance d. The distance d is the filtering distance, which is for example 15 mm. In this way, objects whose smallest dimension is greater than d are retained. The edges of the plate 20 and the collar 16 delimit each other a circulation mouth 21 which extend circumferentially around the X-X axis.

[0021] As shown in FIG. 2, the plate 20 is constituted by a central zone 22 that extends in front of the evacuation entrance 12 and a peripheral zone 24 that surrounds the central zone 22. The central zone 22 is formed by a solid wall and has a diameter that is equal to the diameter D2.

[0022] The peripheral zone 24 is provided with three evacuation through openings 26 as well as three fixing holes 28 (Figure 3).

[0023] The evacuation openings 26 lie entirely opposite the collar 16 and have an oblong shape that extends along the periphery of the plate 20. In axial view, each opening has a circular ring sectional shape. Each opening has a constant width and has an arched shape centered on the X-X axis. The openings 26 are regularly distributed around the X-X axis and each opening extends over the same angular range α, which is 90 °. The evacuation openings 26 preferably extend completely over an angular range between 240 ° and 300 °. The width L1 measured radially from the opening 26 is smaller than the radial width of the collar 16. The contour referenced with 30 of each opening 26 is constituted by two radial end sections 32, 34 and two outer circumferential sections 36 and inner 38.

[0024] A guiding projection 40 of liquid protrudes from the face of the plate 20 turned towards the container 8. They extend to the collar 16 (Figure 1) through the mouth 21. As illustrated in Figure 3, each opening 26 is provided with two of these projections 40. Each projection 40 comprises a radial branch 44, which extend along the corresponding radial end section 32, 34, as well as a circumferential branch 48, which extends along of a part of the inner circumferential contour section 38. The circumferential branch 48 is adjacent to the radial branch 44. The length of the two branches 44.48 is substantially identical such that each projection 40 has, in axial view, a shape general of L.

[0025] The guiding device 10 further comprises filtering means adapted to filter the liquid flowing through the openings 26. As shown in Figures 2 and 4, these filtering means comprise a plurality of radial ribs 50 arranged in the plate 20 and protruding axially from the side opposite the container 8.

[0026] The ribs 50 extend above the evacuation openings 26 and at a mutual distance d, at their radially outer ends. This distance d is therefore equal to the filtering distance. The radial width L2 of the ribs 50 is preferably between 1.5 times and 2.5 times the radial width L1 of the evacuation opening 26. In this case, the radial width L2 is substantially twice the width L1.

[0027] The axial height H of each rib 50 is between 1.5 times and 4 times the axial height d of the projections 40. The axial upper end of the ribs 50 defines a level N3.

[0028] Each rib 50 is provided with a socket 52 axially open towards the evacuation opening and circumferentially through.

[0029] The ribs 50 of each opening 26 comprise two lateral ribs 50A, which are disposed at the circumferential end of each opening 26. The height of the alveolus 52A of each of these ribs 50A is equal ad, therefore identical to the filtering distance

[0030] The height of the alveoli 52A of these lateral ribs is less than the height of the alveoli 52 of the ribs 50 located between the lateral ribs 50A.

[0031] The alveoli 52, 52A make it possible to reduce the amount of material necessary for the manufacture of the guiding device 10.

[0032] The lateral ribs 52A of two adjacent openings 26 are arranged at a mutual distance greater than the filtering distance d. The guiding device thus forms a radial passage of liquid 54 devoid of filtering means. When the liquid level is between levels N2 and N3, the unfiltered liquid can circulate through the central zone 22 and is filtered through the radially inner part of the ribs 50.

[0033] The device 2 on the other hand comprises three nuts 60 screwed on the stems 18 and which press the guiding device against the collar 16.

[0034] The guiding device 10 is manufactured by molding in a single piece.

[0035] The evacuation device is manufactured as follows: the guiding device 10 is molded in one piece. The collecting vessel 8 is welded to the upper end of the evacuation pipe 6. Next, the guiding device 10 is placed on the collar 16 and fixed thereto with the nuts 60. It is found that the assembly 2 is easy to assemble. and fast. The evacuation assembly works as follows. The ribs 50 form a large filtration surface.

[0036] When the water level is located above collar 16 and below plate 20, therefore between level N1 and level N2, water circulates laminarly between collar 16 and plate 20 and it is evacuated through the entrance 12. In this operating condition, the evacuation openings 26 and the ribs 50 are not in contact with water.

[0037] When the water level is above the plate 20, but below the upper end of the ribs 50, therefore between levels N2 and N3, a first part E1 of the water circulates radially between the collar 16 and plate 20. A second part E2 circulates radially inwardly through the interstices between the ribs 50. A third part E3 circulates radially inwardly through steps 54 and then

5 radially outwards through the interstices between the ribs 50.

[0038] After having passed the interstices between the ribs 50, the water circulates axially through the evacuation openings 26 and then is radially diverted towards the X-X axis (arrow E).

[0039] In the case where the water level is higher than the level E3, the side of each rib 50 located opposite the plate 20 also contributes to the filtrate.

[0040] The radial branches 44 of the projections 40 prevent the generation of a vortex, while the circumferential branches 48 lead to a uniform distribution of the water pressure on the plate 20. Consequently, the water circulates in a laminar manner between the plate 20 and collar 16 and does not drag air through pipe 6. Device 2 therefore has a so-called siphon operation.

[0041] The device 2 according to the invention is easy to manufacture and assemble thanks to the manufacture of a

15 single piece of the guiding device 10. In addition, the device 2 allows to reach a high flow of water for a given diameter of the pipe thanks to the laminar circulation of the liquid and the high filter surface.

[0042] The arrangement of the ribs 50 further facilitates the cleaning of the device.

[0043] On the other hand, the liquid guiding device 10 according to the invention allows pipes of different diameters to be used while maintaining good evacuation properties.

Claims (16)

1. Device for evacuating a liquid, especially water, rainwater, of the type comprising an evacuation pipe (6) that extends along an axis (XX) and that forms an evacuation inlet (12), a collecting container (8) that extends around the evacuation inlet (12) and is provided with a collar (16), and a liquid guiding device (10) comprising a cover plate (20), the plate comprising covering (20) a solid central zone (22) covering the evacuation inlet (12), the covering plate (20) further comprising a peripheral zone (24) that envelops the central zone (22) and extending in front to the collar (16), the evacuation device being characterized by the fact that, in the peripheral area (24) at least one evacuation opening (26) of the liquid delimiting an edge (30) is arranged, and by the fact that at least one element is provided for each opening (26) of guiding (40) of liquid in the annular space between the cover plate (20) and the collar (16), which extend the guiding element (40) along a part of the edge (30) and comprising a radial branch (44) extending substantially radially with respect to the axis (XX) of the evacuation pipe (6) and a circumferential branch (48) extending to the radial branch (44) and extending substantially circumferentially with respect to the axis (XX) of the evacuation pipe (6).

2.

Evacuation device according to claim 1; characterized in that for each opening (26) two liquid guiding elements (40) are provided in the annular space between the cover plate (20) and the collar (16) and extend along a part of the edge (30), of each circumferential side of the evacuation opening (26), and by the fact that each guiding element (40) comprises a radial branch (44) extending substantially radially and a circumferential branch (48 ) which extends to the radial branch (44) and extends substantially circumferentially with respect to the axis (XX) of the evacuation pipe.

3.

Evacuation device according to claim 1 or 2, characterized in that the circumferential branch (48) of the or of each guiding element extends the radial branch (44) along the radially inner side.

Four.

Evacuation device according to any one of claims 1 to 3, characterized in that the length of the radial branch (44) is substantially identical to the length of the circumferential branch (48).

5.

Evacuation device according to any one of claims 1 to 4, characterized in that the guiding elements (40) extend from the surface of the cover plate (20) to the surface of the collar (16).

6.

Evacuation device according to any one of claims 1 to 5, characterized in that the evacuation opening (26) is oblong in shape whose circumferential extension is greater than the radial extension.

7.

Evacuation device according to any one of claims 1 to 6, characterized in that the cover plate (20) comprises at least two, preferably three, evacuation openings (26).

8.

Evacuation device according to any one of claims 1 to 7, characterized in that the cover plate (20) comprises filtering means (50) disposed on the side of the plate (20) opposite the collecting container (8), and which extends above the or each evacuation opening (26).

9.

Evacuation device according to claim 8, characterized in that the filtering means comprise ribs (50, 50A) that extend radially with respect to the axis (X-X) of the evacuation pipe.

10.

Evacuation device according to claim 9, characterized in that the ribs (50, 50A) have a radial width (L2) that is greater than a radial width (L1) of the evacuation opening (26), especially comprised between 1.5 and 2.5 times the radial width of this opening.

eleven.

Evacuation device according to claim 9 or 10, characterized in that the ribs (50, 50A) have an axial height (H) that is greater than an axial height (d) of the liquid guiding elements (40 ), especially between 1.5 and 4 times this height.

12.

Evacuation device according to any of claims 9 to 11, characterized in that the ribs (50, 50A) comprise alveoli (52, 52A) open towards the evacuation opening (26), especially circumferentially through.

13.

Evacuation device according to claim 12, characterized in that the ribs comprise lateral ribs (50A), which are ribs located at the circumferential ends of the evacuation openings (26), and by the fact that the ribs laterals (50A) comprise alveoli (52A) whose axial height (d) is less than the axial height of the other alveoli (52).

14.

Evacuation device according to any one of claims 8 to 13, characterized in that a radial passage (54) of unfiltered liquid extends between two evacuation opening ends (26) to allow a circulation of liquid towards the central area (22).

fifteen.

Evacuation device according to any of claims 1 to 14, characterized in that

5 the liquid guiding device (10) and the or each liquid guiding element (40) are manufactured in a single piece, and especially by molding. 16. A liquid guiding device (10) for an evacuation device according to the preceding claims comprising a cover plate (20), the cover plate (20) comprising a solid central area (22) intended to cover the inlet of evacuation (12) of an evacuation pipe (6) that extends 10 along an axis (XX), the covering plate (20) further comprising a peripheral zone (24) that envelops the central zone (22) and adapted to extend, in the assembled position in said evacuation device, in front of a collar (16) of a collecting container (8), the guiding device being characterized by the fact that at least one is arranged in the peripheral zone (24) opening through evacuation (26) of the liquid that delimits an edge (30), and by the fact that for each opening (26) at least one guiding element 15 (40) of liquid is provided, extending the guiding element ( 40) along a apart from the edge (30) and comprising a radial branch (44) that is adapted to extend assembled position in said evacuation device, substantially radially with respect to said axis (XX) of the evacuation pipe (6), and a circumferential branch (48) that extends to the radial branch (44) and that is adapted to extend, in assembled position in said evacuation device, substantially circumferentially with respect to said axis (XX), 20 of the evacuation pipe (6).