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1. 发明授权

US3870238A Sand fracturing apparatus and method 失效
$Sand fracturing apparatus and method$
标题翻译： SAND FRACTURING设备和方法
公开(公告)号：US3870238A
公开(公告)日：1975-03-11
申请号：US33469573
申请日：1973-02-22
申请人： DRAVO CORP
发明人： SELLARS GEORGE L
IPC分类号： B02C17/14 , B02C23/16
CPC分类号： B02C17/14 , B02C23/16 , Y10S241/10
摘要： A sand fracturing machine for breaking coarse grain of sand into smaller grains. The machine includes an open topped container having a bottom wall with circular openings therethrough. Rods of steel or other suitably hard material are located in the box and are supported by the bottom wall. Sand containing grains of many different sieve sizes is introduced into the container through its open top which falls on top of the rods. A vibration mechanism connected to the container is operative to vibrate the container in a substantially vertical direction. The sand sifts downwardly between the vibrating rods and out through the openings in the bottom wall of the container. As the larger grains pass between the vibrating rods, however, they are fractured by the rods to create smaller mid-size grains while the smallest grains sift between the rods unaffected. Consequently, the machine is operative to produce a sand aggregate with a different grain size distribution from that of the sand put into it which principally has a greater percentage of mid-size grains than found in the sand placed into the machine.
摘要翻译：一种用于将粗粒砂破碎成较小颗粒的砂压机。该机器包括敞开的顶部容器，其具有通过其的圆形开口的底壁。钢或其他合适硬质材料的棒位于箱体中并由底壁支撑。含有许多不同筛分尺寸的颗粒的砂通过其顶部落入棒的顶部而引入容器中。连接到容器的振动机构用于使容器在基本垂直的方向上振动。沙子在振动杆之间向下移动并穿过容器底壁的开口。然而，当较大的颗粒在振动杆之间通过时，它们被棒断裂以产生较小的中等尺寸的颗粒，而最小的颗粒在不受影响的杆之间筛选。因此，该机器可操作地产生具有与放入其中的砂粒度分布不同的粒度分布的砂粒料，其主要具有比放置在机器中的砂中发现的更大百分比的中等粒度的砂粒。

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