Multi-stage anti-blocking vibration screening machine for asphalt pavement milling materials

By using rake teeth inserted into the gaps between the cantilever screen bars in a vibrating screen and combining this with airflow cooling, the problem of screen clogging caused by frictional heat generation in the screening of asphalt pavement milling material was solved, improving screening efficiency and equipment stability, and ensuring the quality of recycled asphalt mixtures.

CN122076691APending Publication Date: 2026-05-26SICHUAN JIAOTOU CONSTR ENG CO LTD
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Patent Information

Application Number
CN202610150155.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-02-03
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

When screening milled asphalt pavement material, existing vibrating screens are prone to softening and clogging of the asphalt due to frictional heat, and it is difficult to effectively remove the clogging problem, resulting in reduced screening efficiency and equipment damage.

Method used

The system uses rake teeth inserted into the gaps between the cantilever screen bars to break up the jamming, and cools it with directional airflow. Combined with the reciprocating motion of the rake teeth driven by the rotating shaft and eccentric wheel, it achieves mechanical breaking and temperature control to prevent asphalt from melting.

Benefits of technology

It effectively prevents asphalt from melting and stringing due to frictional heat, improves screening efficiency, extends equipment life, and ensures the gradation quality of recycled asphalt mixtures.

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Abstract

The invention relates to the technical field of construction waste regeneration treatment, in particular to a multistage anti-blocking vibrating screening machine for asphalt pavement milling materials, which comprises a screening box, a first screening assembly, a limiting assembly and a blocking clearing mechanism are arranged in the screening box, and the first screening assembly comprises a plurality of cantilever screen bars; the limiting assembly comprises a limiting plate provided with a plurality of limiting grooves, a blockage clearing mechanism is arranged beside the limiting assembly and comprises a driving assembly and rake teeth, an air outlet is formed beside the blockage clearing mechanism, and mechanical clamping stagnation of materials is damaged by inserting the rake teeth into gaps of the multiple cantilever grate bars; meanwhile, the friction heating core area of the rake teeth and the limiting grooves is continuously cooled through directional airflow of the air outlet, and the temperature of the contact face is strictly controlled to be below the asphalt softening point. The physical breaking is matched with the temperature control mode, so that the problem of screen pasting caused by melting and wire drawing of asphalt due to heat generated by friction is radically eradicated.
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