| 摘要 |
PCT No. PCT/FI85/00082 Sec. 371 Date Jun. 5, 1986 Sec. 102(e) Date Jun. 5, 1986 PCT Filed Oct. 11, 1985 PCT Pub. No. WO86/02287 PCT Pub. Date Apr. 24, 1986.The present invention is concerned with a device for feeding a material to be ground into a pressure chamber grinder provided with an equalizing tank (1), in which said equalizing tank (1) there is substantially the same pressure as in the pre-grinding part of the grinder, with which said pre-grinding part the equalizing tank (1) communicates via screw conveyor. The said device is installed in the top portion of the equalizing tank. The device is characterized in that it comprises a substantially vertical, conical feeder chamber (4), whose volume is, at the maximum, about one quarter of the volume of the equalizing tank (1) and at whose top end there is a feed opening (2) and, at the bottom end, an exhaust opening (3) larger than the feed opening (2); valve members (5, 6) arranged in the said openings (2, 3) and having diameters corresponding to the said openings (2, 3, respectively), the said valve members (5, 6) being provided with elastic closing members, operating in the way of an annular muscle for closing and opening the said openings (2, 3); a gas feed pipe (8) passing into the top portion of the feeder chamber (4) and provided with a valve (7) for the generation of a pressure impact in the top end of the feeder chamber (4), and a gas-removing pipe (10) provided with a valve (9), for lowering the pressure prevailing in the feeder chamber.
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