RAP regeneration mixing device

Abstract

The invention discloses an RAP regeneration mixing device which mainly comprises a roller shaft, an oil motor and a burner, wherein a new aggregate hopper is arranged at the front end of the roller shaft; an enclosure is arranged at the rear section of the roller shaft and connected with a mineral powder conveyor, an asphalt conveyor and a breaker; the roller shaft is provided with a spiral bladeon the inner wall and a spiral paddle on the outer wall; and a mixing cavity is arranged at the tail end of a jacket formed between the enclosure and the roller shaft. The oil motor drives the rollershaft to rotate so that new aggregate in the roller shaft enters the mixing cavity under the push of the spiral blade and is heated by the burner to the specified temperature; RAP entering the mixingcavity from the breaker is wrapped with high-temperature fresh aggregate, and RAP wrapped with the fresh aggregate is pushed toward the front end of the roller shaft under the forced mixing of the spiral paddle; meanwhile, the mineral powder conveyor and the asphalt conveyor add the additives (such as mineral powder) and fresh asphalt into the mixture of the new and old aggregate through a metering device so as to generate new asphalt concrete; and the asphalt concrete is output from a discharge port and directly backfilled onto the road surface, thereby avoiding the RAP waste in the prior art and saving energy and realizing high efficiency.

Description

technical field [0001] The invention relates to the technical field of highway asphalt pavement regeneration, in particular to a RAP regeneration mixing device. Background technique [0002] In road maintenance operations, due to the needs of environmental protection, energy saving and resource conservation, it is necessary to recycle the asphalt pavement material (RAP) obtained from the old asphalt pavement. For this reason, it is necessary to conduct a grading test on the recovered RAP (or have a database of old asphalt pavement), and then determine the proportions of RAP, new aggregate, new asphalt, and mineral powder in the recycled material. In the prior art, special mechanical equipment is used to process old asphalt pavement or recycled asphalt pavement materials (RAP), such as gas heaters, fuel oil heaters, electric heaters, far-infrared heating devices, PTC ceramic heating devices, microwave heating The equipment and the like melt the surface of the damaged road su...

AI Technical Summary

Problems solved by technology

In the prior art, special mechanical equipment is used to process old asphalt pavement or recycled asphalt pavement materials (RAP), such as gas heaters, fuel oil heaters, electric heaters, far-infrared heating devices, PTC ceramic heating devices, microwave heating The equipment and the like melt the surface of the damaged road surface and then crush and recycle the RAP for centralized treatment. The defects of this method are as follows: because the ratio of each component in the RAP of each road section is different, it is impossible to determine what to add to the RAP. Therefore, the recycled RAP mixture cannot be reused and has to be discarded. This wastes resources on the one hand, and damages the environment on the other hand. It violates the environment. friendly and resource-efficient requirements

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