Gravel classifying and screening machine and gravel classifying and screening construction process

Abstract

The invention discloses a gravel classifying and screening machine and a gravel classifying and screening construction process. The gravel classifying and screening machine comprises a rack and a mesh assembly. Gravel is slowly poured on meshes formed by multiple upper-layer cross rods and multiple lower-layer cross rods, and the gravel is classified and screened under periodic movement and swaying of braking universal wheels. When the gravel is clamped in meshes, telescopic rods are controlled to stretch out of top hinge rods, the distance between the telescopic rods and the top hinge rods is increased, then the gravel is naturally loosened and automatically falls off, at the moment, sealing bodies are flexibly folded, a motor rotates to wrap the sealing bodies on a reel, and the gravel cannot fall off from the front end and the rear end of the upper-layer cross rods; and then the telescopic rods are controlled to contract and pull back the hinge rods to reduce the spacing distance between the telescopic rods and the top hinge rods, the motor rotates reversely to release the sealing bodies from the reel to the upper-layer cross rods, rapid resetting is achieved, then the gravel is classified and screened again, and the problem that the gravel needs to be taken out through tools such as a crowbar after shutdown is solved. The screening efficiency of gravel classification is improved.

Description

technical field [0001] The invention relates to a sand and gravel classification screen machine and a sand and gravel classification and screening construction process, belonging to the technical field of sand and gravel production. Background technique [0002] Machine-made sandstone (also known as sandstone) is a construction material formed by breaking large rocks in mines with mechanical equipment. Due to the low transportation cost and good production controllability of machine-made sandstone, it is widely used in roads, During the construction of railway bridge subgrades and other constructions; in the process of crushing sand and gravel with a crusher, because the sand and gravel particles themselves are squeezed against each other, dust is mixed with the sand and gravel after the crushing is completed. In order to obtain pure and high-quality The gravel needs to be screened; [0003] At present, the screen is mainly used to classify and screen sand and gravel. Since...

AI Technical Summary

Problems solved by technology

[0003]At present, the screen is mainly used to classify and screen sand and gravel. Since the mesh of the screen cannot be adjusted, when the sand and gravel are stuck in the mesh, it is necessary to Stop working and use tools such as crowbars to remove sand and gravel, which reduces the efficiency of sand and gravel sorting and screening

Images