Backwash Arrangement for Cleaning a Cylindrical Filter Screen

摘要

A backwash arrangement for cleaning a cylindrical filter screen includes a cylindrical filter screen within which extends an axial central conduit. A number of radial branch conduits extend outwards from the central conduit towards the cylindrical filter screen, each provided with a spring-loaded nozzle arrangement. The spring-loaded nozzle arrangement is biased into contact with the cylindrical filter screen, and includes a nozzle opening for passing across the cylindrical filter screen, and a pair of wheels deployed on opposing sides of the nozzle opening for rolling engagement with the cylindrical filter screen.

主权项

1. A backwash arrangement for cleaning a cylindrical filter screen, the backwash arrangement comprising:
(a) a cylindrical filter screen; (b) a central conduit extending axially within said cylindrical filter screen; (c) a plurality of radial branch conduits extending outwards from said central conduit towards said cylindrical filter screen; and (d) a spring-loaded nozzle arrangement associated with each of said radial branch conduits, said spring-loaded nozzle arrangement being biased into contact with said cylindrical filter screen, wherein said spring-loaded nozzle arrangement comprises:
(i) a nozzle opening for passing across said cylindrical filter screen, and(ii) a pair of wheels deployed on opposing sides of said nozzle opening and deployed for rolling engagement with said cylindrical filter screen.