Double-barrel sand screening device

Abstract

The invention discloses a double-barrel sand screening device, and relates to the technical field of sand screening. The double-barrel sand screening device includes a dust-proof shell, the lower partof the dust-proof shell is fixedly connected with a bracket assembly; the inner wall of the dust-proof shell is fixedly connected with two supporting rings; the inner walls of the two supporting rings are rotatably connected with an outer screen barrel through bearings; the inner wall of the outer screen barrel is correspondingly and fixedly connected with a first connection ring and a second connection ring; a self-cleaning assembly is fixedly connected between the inner surfaces of the two supporting rings; and an inner screen barrel is arranged in the outer screen barrel. According to thedouble-barrel sand screening device, through the design of the inner screen barrel and the outer barrel, primary screening of a traditional barrel type screening device is changed into secondary screening, so that a variety of sand materials with different particle sizes are screened out through secondary screening, and through the design of first spiral flow control blades and second spiral flowcontrol blades, the screening time of the materials in the screen barrels can be controlled by controlling the flow rate of the materials.

Description

technical field [0001] The invention belongs to the technical field of sand and gravel screening, in particular to a double-drum sand and gravel screening device. Background technique [0002] The process in which broken materials are divided into different particle sizes through one or several layers of sieve surface is called screening. The sieving machine uses the relative movement between the granular material and the sieve surface to make some particles pass through the sieve holes, and the materials used in the building Sand, gravel, gravel and other materials are divided into different levels of vibrating screening machinery and equipment according to particle size. The screening process of the screening machine is generally continuous. The sieve hole is called the under-sieve product; the material larger than the sieve size is continuously discharged from the sieve surface, which is called the over-sieve product. [0003] Most of the existing sand and gravel screeni...

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Problems solved by technology

[0004] The object of the present invention is to provide a double-drum gravel screening device, through the design of the outer screen cylinder, the inner screen cylinder, the first spiral flow control vane and the second spiral flow control vane, it solves the problem of the existing cylindrical sandstone screening device. The stone screening device can only screen once, and the flow speed of the material cannot be controlled during screening, and the screening effect is limited.

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