A centrifugal sand screening device

Abstract

The invention discloses a centrifugal sand screening device. The device comprises a shell, the top of the shell communicates with a feeding pipe, a rotating shaft is arranged in the feeding pipe, andthe part, located in the feeding pipe, of the rotating shaft is fixedly connected with a spiral blade; and a crushing cutter is fixedly connected to the position, located below the spiral blade, of the rotating shaft, and a conical sieve is arranged below the crushing cutter. According to the device, the spiral blade and a variable-frequency motor are arranged so that the feeding speed can be controlled, and the sand sieving effect can be guaranteed; the conical sieve and crushing teeth arranged on the conical sieve are arranged, the separation speed of large-mass waste residues such as stonescan be increased under the action of centrifugal force, and the screening efficiency can be improved; sand blocks are crushed through the rotating crushing teeth so that the waste of sand materials can be avoided; an annular sieve which moves up and down is arranged to carry out secondary sieving on the waste residues, and residual fine sand can be recycled; and a spiral discharging roller whichis in linkage with the rotating shaft is arranged so that synchronous discharging can be realized, discharging can be thorough, and the efficiency of sand sieving operation can be improved.

Description

technical field [0001] The invention relates to the field of construction machinery, in particular to a centrifugal sand screening device. Background technique [0002] The sand sieving machine imitates the working principle of artificially using the inclined screen to screen sand. It adopts a flat rolling screen cylinder and ensures that the material flow can be continuously rolled for more than five circles between the multi-turn inner spiral blades in the screen cylinder, so that the sand material can be repeatedly screened. Rolling and sliding to fully discrete and separate; different from the pushing and burying of large and small materials caused by inclined roller sieves, the screening process is rushed; it is also different from the vibration and mixing of large and small materials caused by inclined vibrating screens; Vibrating sieve plate sand sieving machine. [0003] Sand screening machine is a common construction machine. By screening sand materials, fine sand ...

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