Anti-contamination sand screening device

Abstract

The invention discloses an anti-contamination sand screening device. The anti-contamination sand screening device comprises a shell; four supporting columns are welded to the bottom end of the shell; an inlet is formed in the middle of one end of the shell; an outlet is formed in the middle of the other end of the shell; the portion, between the inlet and the outlet, of the inner side wall of the bottom end of the shell is obliquely arranged downwards; and a discharge port is arranged in the outer side wall, close to the side of the outlet, of the bottom end in the shell. According to the anti-contamination sand screening device disclosed by the invention, an extrusion sleeve used for preventing the screen from backing is mounted at the stepped-hole-shaped mounting groove part by utilizing fixing bolts, so that the screen is convenient to disassemble and replace; and the calibers of a first-stage sand screening barrel, a middle sand screening barrel and the last-stage sand screening barrel are sequentially increased, so that the first-stage sand screening barrel, the middle sand screening barrel and the last-stage sand screening barrel can be disassembled and replaced at the opening part of the lower bottom surface of the last-stage sand screening barrel in the process of not opening the shell, so that the anti-contamination sand screening device is convenient to maintain and use, and the service life of the anti-contamination sand screening device is prolonged.

Description

technical field [0001] The invention relates to the technical field of construction machinery, in particular to an anti-pollution sand screening device. Background technique [0002] Sand is an indispensable building material in building construction, but most of the purchased sand raw materials are mixed with various impurities, so before use, it is necessary to separate the impurities in the sand through a sand screening device, generally using a manual sieve , but manual sand screening is intensive and inefficient. [0003] At present, the main sand screening principle of the existing sand screening device is to place the sand to be screened on the upper surface of screens with different mesh sizes with screening function, and to screen the qualified small particles of fine sand through the function of screen filtration. However, the large-grained sand with a particle size larger than the pore size of the screen stays on the surface of the screen, so that the use of sand...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an anti-contamination sand screening device to solve the problem that the existing sand screening device proposed in the above-mentioned background technology has a single function, and the outer surface of the screened large-grained sand is easily contaminated with fine sand. It is easy to cause loss and waste of contaminated fine sand. During the sand screening process, the load-bearing capacity and anti-wear performance of the screen determine the efficiency of sand screening and the service life of the sand screening device.

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