| 摘要 |
966,646. Washing cakes off filters-for-liquids. INDUSTRIAL FILTER & PUMP MFG. CO. June 20, 1962 [Aug. 30, 1961], No. 23778/62. Heading BID. Filter leaves 28, Fig. 3, are secured between a bar 29 and an outlet manifold 36 with which their interiors communicate. The leaves may be removed as a unit along with bar 29, manifold 36, a sluicing assembly (see below) and the cover 25, Fig. 1, of a tank 21 by the chain mechanism shown, the manifold 36 having an extension 36a provided with a wheel 39. The extension 36a also has an upright 41 with, at its upper end, a bearing 42 for a conduit 44, the latter being releasably connected to an inlet pipe 65 for sluicing-liquid secured in the fixed end 24 of the tank. The pipe 44 is connected at its other end to a valve casing 160 from which extend a conduit 66a ending in a horizontal upper manifold 67 and a conduit 66b ending in a lower manifold 68, Figs. 3 and 4. Spray tubes 88 depend from manifold 67 and spray tubes 89 extend upwards from manifold 68 between the filter leaves. Manifolds 67 and 68 are connected by a support bar 71, Fig. 1, to the hollow shaft 75 of an actuator unit 77. Parts 44 to 77 form the sluicing assembly. For sluicing, conduit 63 for unfiltered liquid is closed, sluicing pipe 65 is opened and actuator 77 is switched on. The actuator 77 thereupon automatically rocks the sluicing assembly about a horizontal axis through an angle of approximately 165 degrees between the extreme positions shown in Fig. 3. A shuttle valve in the housing 160 ensures that sluicing liquid is being supplied only to that manifold (67 or 68) which is descending or is about to descend. The valve is changed over by an automatic brief interruption of the sluicing liquid at the end of each clockwise and each counter-clockwise stroke of the assembly. Such interruption is effected by an electrically-controlled valve 199 in pipe 65. |
