Gravel screening device for concrete preparation

Abstract

The invention discloses a gravel screening device for concrete preparation, and belongs to the technical field of concrete preparation, the gravel screening device comprises a screening box body and a storage box body arranged below the screening box body, a movable screening plate and a static screening plate are arranged in the screening box body from top to bottom, and a cam is arranged in the screening box body; a driving motor for driving the cam to rotate is arranged on the screening box body, a rolling wheel matched with the cam is arranged on one side of the movable screening plate, a push rod is arranged at the end, away from the cam, of the movable screening plate, a movable cavity is formed in the inner wall of the screening box body, and the push rod is arranged in the movable cavity. A reset spring is arranged in the push rod and the movable cavity. According to the gravel screening device, the movable screening plate and the static screening plate are arranged, gravel is screened in two modes, the screening efficiency and effect are improved, it can be guaranteed that materials fall on the movable screening plate through the arranged material blocking plate, the materials are prevented from directly entering the static screening plate and other positions, and the screening reliability is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of concrete preparation, and particularly relates to a sand and gravel screening device for concrete preparation. Background technique [0002] Concrete refers to an artificial stone made of cement as the main cementing material, mixed with water, sand, stone, and if necessary, chemical admixtures and mineral admixtures, mixed in appropriate proportions, uniformly stirred, compacted, and cured and hardened. In the process of concrete preparation, there are certain requirements for the thickness of the raw sand particles. Excessive sand particles will affect the quality of the concrete. Therefore, it is necessary to screen out the sand and gravel with larger particles in the sand. [0003] The existing sand and gravel screening devices generally only use static filtration screening, which not only has slow screening efficiency, but also has poor screening effects. SUMMARY OF THE INVENTION [0004] In view ...

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Problems solved by technology

[0003] However, the existing sand and gravel sieving devices generally only use static filtration and screening, not only the screening efficiency is slow, but also the sieving effect is relatively poor.

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