| 摘要 |
<p>A self-cleaning strainer(1) comprises a vertically disposed housing(3) which contains a rotatable strainer basket(19). The housing has an open top(7), closed by a closure plate(13), an inlet(15) adjacent the top of the housing(3) and an outlet(17) adjacent a closed bottom(9) of the housing, the closed bottom having a flush discharge opening(11). The components(31) used to rotate the strainer basket are disposed outside the flow of any water containing particulates that enters the housing. Cleaning devices(71) such as a scraper blade(73) supported in the strainer basket(19), a rotatable brush(101) supported in the strainer basket, and a water jet manifold(131) disposed between the housing sidewall(5) and the sidewall(21) of the strainer basket are used to clean the rotatable strainer basket. In one embodiment, a hollow backwash conduit(273) with a passage(285) through the sidewall is positioned adjacent the inner surface of the strainer basket(219) and communicates with a sealable aperture(279) in the wall of the housing(203). Upon opening of the aperture, cleaned water flows through the side wall of the strainer basket, removing particulates therefrom, and out the hollow backwash conduit(273). An intermittently rotatable brush(323) is also provided to brush the inner surface of the strainer basket. <IMAGE></p> |
