Sediment trap

Abstract

An apparatus for settling sediment from a liquid collected in a drainage pit, including a plurality of spaced apart deflectors which are configured to be inclined in use, the deflectors comprising: an uppermost deflector having an aperture formed in an upper portion thereof so that liquid pooling in the pit can flow through the aperture, a second deflector arranged in use to be at least partially below the uppermost deflector, the second deflector opening into a sediment reservoir at a lower end thereof so that liquid flowing along the second deflector can settle in the sediment reservoir, and a third deflector extending upwardly from the sediment reservoir, the third deflector having an aperture formed in an upper portion thereof so that liquid pooling in the sediment reservoir can flow along the third deflector and through the aperture to exit the pit.

1 . An apparatus for settling sediment from a liquid collected in a drainage pit, including a plurality of spaced apart deflectors which are configured to be inclined in use, the deflectors, comprising:
 an uppermost deflector having an aperture formed in an upper portion thereof so that liquid pooling in the pit can flow through the aperture,   a second deflector arranged in use to be at least partially below the uppermost deflector, the second deflector opening into a sediment reservoir at a lower end thereof so that liquid flowing along the second deflector can settle in the sediment reservoir, and
 a third deflector extending upwardly from the sediment reservoir, the third deflector having an aperture formed in an upper portion thereof so that liquid pooling in the sediment reservoir can flow along the third deflector and through the aperture to exit the pit. 
   
     
     
         2 . An apparatus according to  claim 1 , wherein each of the deflectors are formed of a plurality of plate-like members which are arranged in an end-to-end configuration. 
     
     
         3 . An apparatus according to  claim 2 , wherein an outer surface of the deflectors is generally in the form of a pyramid. 
     
     
         4 . An apparatus according to  claim 3 , wherein the outer surface is in the form of a truncated pyramid. 
     
     
         5 . An apparatus according to  claim 2 , wherein the uppermost and third deflectors each have a centrally disposed aperture through which the liquid can flow. 
     
     
         6 . An apparatus according to  claim 1 , wherein an initial sediment reservoir is defined around a lower edge of the uppermost deflector. 
     
     
         7 . An apparatus according to  claim 6 , wherein the uppermost deflector has upturned sides which are configured to be received against and generally parallel to walls of the pit. 
     
     
         8 . An apparatus according to  claim 1 , wherein the uppermost deflector spans across the pit. 
     
     
         9 . An apparatus according to  claim 1 , wherein the pit has a square cross section. 
     
     
         10 . An apparatus according to  claim 1 , wherein the deflectors are formed from sheet metal or plastic. 
     
     
         11 . An apparatus according to  claim 1 , further comprising supports to support the deflectors from each other. 
     
     
         12 . An apparatus according to  claim 1 , wherein each of the deflectors are configured to be removably stackable from each other. 
     
     
         13 . An assembly comprising an apparatus according to  claim 1 , the apparatus being installed in a drainage pit.