Gravel multistage screening optional equipment for concrete

The utility model provides a such gravel multistage screening optional equipment for concrete, including screening case, feeder hopper, installation piece, spout, first filter screen, second filter screen etc, screening roof portion intermediate junction has the feeder hopper, and two walls symmetry formula evenly is connected with the installation piece about the screening incasement, and the spout has all been opened to the inboard of installation piece, is equipped with first filter screen between the installation piece on upper portion, is equipped with the second filter screen between theinstallation piece at middle part. The utility model discloses earlier changeing the board through the kelly with the second and fixing, the layering is carried out with gravel to the multistage screening selection of the first filter screen of rethread and second filter screen and third filter screen, and in -process filtering constantly strikes first filter screen and second filter screen and third filter screen for gr