Can dismantle cyclic utilization's visual back -up sand pipe die type

The utility model provides a can dismantle cyclic utilization's visual back -up sand pipe die type, including end cover, main barrel body, compaction subassembly and end cover coupling assembling, main barrel body is cylindrical transparent cylinder body, the compaction subassembly includes piston, screw rod and crossover sub, the piston is inside to have a perfect understanding the centre bore, is equipped with the screw rod in the centre bore. Back -up sand pipe main part tubular column part is transparent organic glass material, can realize the visual of displacement experiment process, what the screw rod was utilized to sand -packed model's back -up sand process screws the compaction, and sand -packed model's repeatability is realized to the position of inserting in the main part tubular column sand volume and screw rod piston through control, and simultaneously, the sand -packed model of different length can also be filled and presented out according to the difference of experiment demand to same root ba