Single size fraction fine screening mechanism for building stones

• Main Authors: MENG WENHUA, SHAO JIANZHONG, ZHOU HUAWEI, SHA QINGLIN, LU YUANMING, REN JIANJUN, MENG ZHENJUN
• Format: Patent
• Language: Chinese; English
• Published: 05.05.2010
• Subjects: CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES; CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, ORTHE LIKE; FIXED CONSTRUCTIONS; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR

The utility model relates to a screening and grading device for building stones in highway construction, in particular to a single size fraction fine screening mechanism for building stones. The utility model adopts the technical scheme that an upper screening machine is mounted at the upper part of a frame in an inclined manner, a lower screening machine is mounted on the frame below the upper screening machine in an inclined manner, and a discharge outlet of the upper screening machine is communicated with a feed inlet of the lower screening machine. The mechanism is characterized in that both the upper and the lower screening machines comprise two layers of screen meshes respectively, wherein a building stone outlet is arranged on each layer of the meshes, and outlets below upper screen meshes of the upper and the lower screening machines respectively serve as inlets of lower screen meshes thereof. The utility model can realize the fine grading of building stones, thereby improving the quality of paved roa