Sand rain process automatic sander

Abstract

The invention belongs to the technical field of construction projects and relates to a sand rain process automatic sander. The sand rain process automatic sander comprises a PLC, servo motors, track guide rails, a sand charging barrel, a hose, nozzles, a sanding cylinder, filter plates and a screen, wherein the PLC is connected with three servo motors, and the servo motors are operated to control the track guide rails in the respective direction to move; the sand charging barrel is suspended at a high part, the sand can flow downwards, and the bottom of the sand charging barrel is connected with the top of the nozzles by virtue of the hose; the bottom of the nozzles are screwed with the sanding cylinder, the filter plates of different sizes are arranged among the nozzles and are used for controlling the flow, and the nozzles are fixedly arranged on the track guide rails; and the screen is arranged at the bottom of the sanding cylinder. According to the sand rain process automatic sander disclosed by the invention, the instrument is easy to operate, the three-dimensional motion is automatically controlled, the manual operation errors are reduced, the prepared sample is high in uniformity and repeatability, the relative compactness range is wide, and most of experimental requirements can be met. Moreover, the sand rain process automatic sander is conveniently applied to large model experiments, particularly a centrifugal model experiment.

Description

Technical field [0001] The invention belongs to the technical field of construction engineering, and relates to a sanding device for preparing sand samples in geotechnical model experiments, in particular to an automatic sanding device for preparing sand samples by a sand rain method. Background technique [0002] Sample preparation is a crucial technical link in the geotechnical model experiment, and the quality of sample loading directly affects the success or failure of the model experiment. At present, the commonly used methods for preparing sand samples are vibration method, compaction method, pounding method and sand rain method. Vibration method and compaction method can better simulate the backfilled sand layer, but they are often used in unit sample experiments such as dynamic and static triaxial, resonance column, etc., and cannot be directly applied to large-scale model experiments; sand rain method can be better The natural sandy soil layer deposited by simulating wi...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the invention is to overcome the deficiencies of the device for preparing sand samples in traditional geotechnical model experiments, especially the sand spreading device for preparing sand samples by the sand rain method: the error of manual operation has a large impact on the results, and the sample is repeated. Poor performance and uniformity, the relative density range of prepared sand samples is small, etc.

Images