| 摘要 |
PROBLEM TO BE SOLVED: To provide a drum type river sand manufacturing apparatus manufacturing a large amount of river sand, by crushing raw stones in a flow path groove with dropping energy of an iron ball. SOLUTION: A charge port and a discharge port are provided inside a rotary drum, a lot of partitioning plates 7 of about 40 cm high are fixed therebetween with spaces of about 35 cm, and one sending port is provided per one rotation in the flow path grooves 8 partitioned by the partitioning plates. One row of the raw stones and water A flow per one rotation, and the iron balls 16 are placed in the respective flow path grooves in advance. A lot of two-storied V-shaped vanes 11 are mounted inside the flow path grooves, raw stones and water are scraped up to the first floor part, the iron balls are scraped up to the second floor part, and first, the raw stones drop, then the iron ball drops. A crushing chamber 14 is set at the dropping point, crushed raw stones and water drop thereto, and corners are crushed and further crushed by the iron ball dropping from above. Abrasion preventive means formed by bending reinforcements 10 in V-shape and sand particles are formed on the bottom plate of the flow path grooves. COPYRIGHT: (C)2009,JPO&INPIT
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