Screw conveyor to convey powdery material, in particular cement or the like
(22) 29.09.2017
(43) 05.04.2018
(57) A screw conveyor (100) to convey powdery material, in particular cement. The screw conveyor (100) comprises: – a transfer screw (70); and – a trough (80) containing the transfer screw (70); the trough (80) being provided with an inlet section (81) and an outlet section (82) of the powdery material. The screw conveyor (100) is characterized in that the screw comprises : – at least a first screw portion (TSEC) having a first law of continuous variation of the pitches of the screw (70), which can be graphically represented by means of a first function having in at least one stretch a first derivative other than zero; and – at least a second screw portion (TSEC) having a second law of continuous variation of the pitches of the screw (70), which can be graphically represented by a second function having in at least one stretch a first derivative other than zero. The first law of continuous variation of the pitches (PTC) is different from the second law of continuous variation of the pitches (PTC).
(71) WAMGroup S.p.A., Strada degli Schiocchi, 12, 41100 Modena (IT)
(84) ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
