Storm water filter arrangement

Details Storm water filter arrangement Storm water filter arrangement

E - Fixed Constructions

03

F

E03F 1/00 (2006.01) E03F 5/14 (2006.01)

Patent

CA 2236311

A filter is described for filtering gross pollution from storm water for fitment to storm water traps located at the entry and exit of storm water, underground and drainage systems. Traps of various configurations can be fitted with a gross pollution filter apparatus comprising a filter basket (20) located below the entry level of storm water into the trap so as to provide a bypass channel (22) to allow a volume of storm water to pass through the trap. A storm water bypass means (28) is arranged to restrict entry of incoming storm water and gross pollution into the bypass channel while the combined pressure of storm water and gross pollution inside the trap is such that storm water can still pass through the filter basket (20). The bypass means (28) which acts like a one-way valve is also arranged to allow storm water to pass into the bypass channel when the combined pressure of storm water and gross pollution inside the trap is such that the storm water is restricted from passing through the filter basket.

L'invention concerne un filtre pour éliminer les débris grossiers de l'eau de pluie, installé à l'entrée d'un puits alimentant le réseau enterré recueillant les eaux de pluie. Des puits de différents types peuvent être pourvus de dispositifs filtrants permettant de retenir les débris grossiers. Ces dispositifs comprennent un panier filtrant (20) disposé en dessous du niveau d'entrée de l'eau de pluie dans le puits et un canal de dérivation (22) permettant le passage d'un certain volume d'eau. Un dispositif de dérivation (28) pour l'eau de pluie permet de restreindre l'entrée de l'eau de pluie et de gros débris dans le canal de dérivation, lorsque la pression de l'eau de pluie et le colmatage par les débris du dispositif filtrant ne sont pas suffisants pour empêcher le passage de l'eau de pluie à travers le panier filtrant (20). Le canal de dérivation (28), qui agit comme une vanne unidirectionnelle, permet à l'eau de pluie de passer dans le canal de dérivation, lorsque la pression de l'eau de pluie et le colmatage du panier sont tels que l'eau de pluie a du mal à passer à travers le panier filtrant.

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