The invention discloses a
river sediment spiral conveyor with a screening function, and relates to the technical field of
sediment transfer, the
river sediment spiral conveyor comprises a conveyor body, an auxiliary plate and a square frame shell, the conveyor body, the auxiliary plate and the square frame shell are located on the same horizontal plane, and the
river sediment spiral conveyor further comprises a particle size judgment
assembly and a screening, collecting and adjusting
assembly; the screening, collecting and adjusting
assembly is located in the middle of the particle size judging assembly. Through the design of the arc ring shape of the porous conflux plate, the particle size judgment accuracy can be effectively improved; due to the arc-ring-shaped design of the flow gathering plate with the holes, a muddy water and sand grain mixture can be subjected to detention operation, so that
silt with different grain diameters is collected in a relatively stable environment, and the problem of inaccurate grain
diameter judgment caused by rapid flowing of the
silt is avoided; by means of the mode, the proportion information of sand grains with different grain sizes can be obtained more accurately, reliable data support is provided for subsequent screening and
processing work, and the accuracy of grain size judgment is improved.