| 摘要 |
1. In a filtering device (100) for high-viscous fluids, having a two pistons (21, 22) being movably disposed in bores (14.1, 14.2) in a housing each piston (21, 22) having at least one cavity (23.3, 23.4), at least one filter element and having a displacing piston (16) for generating fluid pressure and reversing the flow direction at the fluid during a back-flushing mode in an outlet channel (7.3, 7.4) or in a reservoir (7) connected therewith, there is only one common displacing piston (16) provided for back-flushing the filter element in any of the cavities (23.3, 23.4); wherein:
- each cavity (23.3, 23.4) having at least two outlet openings (25.3, 25.4, 26.3, 26.4),
- one of the outlet openings is capable of being connected to a direct outlet channel (3.3, 3.4) which is directly connected with the outlet opening (12) of the device (100)
- and one of the outlet openings is capable of being connected to an indirect outlet channel (7.3, 7.4),
- wherein the indirect outlet channels (7.3, 7.4) open into a common reservoir (7) in which the displacing piston (16) is movably disposed;
- the positions of the outlet openings (25.3, ...25.4, 26.3, 26.4) from each cavity (23.3, 23.4) and the outlet channel openings (5.3, 5.4,6.3, 6.4) in the housing (10) as well as of the inlet channels (4) and back-flushing channels (8.3) are arranged such:
- that in production mode at each cavity (23.3, 23.4) at least one outlet opening (25.3, 25.4) is overlapping at least partially with one direct outlet opening (5.3, 5.4) and at least one additional outlet opening (26.3, 26.4) is overlapping at least partially with an indirect outlet opening (6.3, 6.4):
- that in the back-flushing mode the indirect outlet channel (7.3) is connected to at least one outlet opening (25.3, 25.4, 26.3, 26.4) of the cavity (23.3) which is to be back-flushed. |
