FR2506805A1

FR2506805A1 - Control for regulating rain-water drainage - comprises reservoirs which store water for short term when drains overflow

Info

Publication number: FR2506805A1
Application number: FR8110756A
Authority: FR
Original assignee: Individual
Current assignee: Individual
Priority date: 1981-05-27
Filing date: 1981-05-27
Publication date: 1982-12-03
Also published as: FR2506805B3

Abstract

The control is for regulating the drainage of rainwater and comprises reservoirs, the level in which varies according to the severity of the rainfall. The reservoirs admit water from the surface to be drained via ducts (B) and discharge into a main drain below via narrower outlets (E). A valve (F) allows water to be stored for a short-term in each reservoir until the main drain is able to take the flow. This allows the main drain to be constructed with a smaller diameter than usual.

Description

La présente invention concerne les canalisations et réseaux d'écoulement d'eaux et plus spécialement des eaux pluviales. The present invention relates to pipes and networks for the flow of water and more particularly rainwater.

Dans les réalisations de ce genre les dimensions des canalisations et oizvrages annexes sont calculés en tenant compte de l'importance des précipitations orageuses et de la surface, bassin versant, dont l'eau est à évacuer. In constructions of this kind, the dimensions of the pipes and ancillary works are calculated taking into account the amount of stormy precipitation and the surface, catchment area, from which the water is to be drained.

I1 s'en suit que les tronçons de canalisations ou réseaux dans leur par cours Aval doivent non seulement admettre, assurer le débit de l'eau déversée au droit de ces tronçons, mais aussi assurer l'évacuation des tronçons Amont. It follows that the sections of pipes or networks in their downstream course must not only admit, ensure the flow of the water discharged at the right of these sections, but also ensure the evacuation of the upstream sections.

Si lton veut correctement évacuer les eaux, il faut concevoir des diamètres de plus en plus importants à mesure que l'on approche du bassin récepteur
Aval.If you want to properly drain the water, you have to design larger and larger diameters as you approach the receiving basin
Downstream.

Devant l'importance de la dépense on se contente, la plupart du temps, d'assurer mn débit moyen. En cas d'orage il y a saturation et meme rupture de certains ouvrages sous l'effet de la pression de l'eau. In front of the importance of the expense one is satisfied, most of the time, to ensure mn average flow. In the event of a thunderstorm, there is saturation and even rupture of certain works under the effect of water pressure.

Le dispositif envisagé, régulateur du débit d'écoulement des eaux pluvia- les, permet d'éviter de tels inconvénients en limitant le débit déversé dans les canalisations. F. 1
I1 comprend essentiellement des réservoirs de retenue à débits différen- ciés placés en parallèles du réseau d'évaeuation. Fig. i A
Le débit d'aimission de l'eau est calculé pour admettre immédiatement et intégrelement l'eau de la surface à assainir en se référant aux plus importantes précipitations orageuses constatées par la météorologie nationale.Fig. 1 B et Fig. 2 D
Le débit d'évacuation est calculé, lui, d'après le maximum admissible dans la canalisation Aval compte tenu de son diamètre et de la pente. Fig. i C
Le débit d'évacuation dépend également du temps mimmum généralement constaté entre deux précipitations orageuses.The envisaged device, regulating the flow rate of rainwater, makes it possible to avoid such drawbacks by limiting the flow discharged into the pipes. F. 1
It essentially comprises holding tanks with different flow rates placed in parallel with the drainage network. Fig. i have
The water magnetization flow is calculated to immediately and fully admit the water from the surface to be sanitized by referring to the greatest storm precipitation noted by the national meteorology. 1 B and Fig. 2 D
The discharge flow is calculated according to the maximum allowable in the downstream pipeline taking into account its diameter and the slope. Fig. i C
The evacuation rate also depends on the mimmum time generally observed between two stormy precipitations.

S'il se révèle nécessaire d'assurer une régularité absolue d'évacuation, un tuyau articulé, au fond du réservoir est maintenu par flotteur è une profondeur déterminée du niveau de l'eau. Ainsi la pression à l'évacuation est constante quel que soit le niveau de l'eau restant å évacuer. Fig. If it proves necessary to ensure absolute regularity of evacuation, an articulated pipe, at the bottom of the tank is held by float at a determined depth of the water level. Thus, the discharge pressure is constant whatever the level of the water remaining to be discharged. Fig.

2 F
Les réservoirs de retenue peuvent, en se joignant les uns à la suite des autres, constituer en m & e temps la canalisation d'évacuation, chacun des réservoirs recevant en Amont d'une part liteau du bassin au droit du réservoir, et d'autre part l'écoulement Aval du réservoir précédent. Fig. 3
Le dispositif objet de l'invention peut titre utilisé dans tous les cas où la pente du terrain interdit une évacuation rapide et est particulièrement in, téressant dans le cas où une canalisation d'évacuation existe déjà, mais est à saturation. On évite alors la réfection de toute le longueur Aval, et il s'en suit une économie très importante.~ 2 F
The holding tanks can, by joining one after the other, constitute at the same time the evacuation pipe, each of the tanks receiving upstream on the one hand a strip of the basin at the right of the tank, and on the other hand the downstream flow from the previous reservoir. Fig. 3
The device which is the subject of the invention can be used in all cases where the slope of the ground prohibits rapid evacuation and is particularly uninteresting in the case where an evacuation pipe already exists, but is at saturation. This avoids the repair of the entire downstream length, and there follows a very significant saving. ~

Claims

PENE2DICATIONS

1 - Water flow regulator, in particular rainwater, characterized in that it includes holding tanks with differentiated flow rates, the difference of which varies according to the extent and speed of the precipitation. These tanks are placed between the water recovery surface and the pipe or drainage basin (Fig.l-A). The difference in flow rate between inlet and outlet is obtained by varying the outlet opening by opening or closing a valve.

2 Regulator according to claim 1 characterized in that the admission flow rate of the water discharged upstream is determined to freely ensure the admission of all of this water during the entire precipitation discharge time (Fig.l B and 2 D ). Evacuation, on the contrary, is limited by a valve whose closing and opening control is caused by the measurement of the intake flow.

3 - Regulator according to claims 1 and 2 characterized in that the retained water is then returned to the flow network by a flow different from that of intake. As soon as thunderstorm precipitation slows down and manifests itself at a level permissible by the collector, the discharge valve opens and clears the discharge opening. This valve closes again if the storm precipitation increases.

4 - Regulator according to claim 3 characterized in that the discharge flow, return is calculated to ensure at least the total return of water during the time between two stormy precipitation and to limit the maximum discharged, to the volume allowable by the collector Downstream.

The limitation of the evacuation flow to meet this requirement is obtained by opening the valve and defining the opening diameter of this valve.

5 - Regulator according to claim 4 characterized in that the evacuation flow rate, in the case of a need for precision is ensured by means of an articulated pipe, the inlet port of which is maintained by float at constant depth of the water level (Fig. 2-F).

6 - Regulator according to claim 1 characterized in that several holding tanks can be joined one after the other, with offset levels to assume the role of water drainage collector (Fig.3).