Centralized heating drum for asphalt mixture in a mobile hot-in-place recycling machine

Abstract

The invention discloses an asphalt mixture central heating roller for a movable in-situ thermal regeneration machine. The asphalt mixture central heating roller comprises a roller body installed on a vehicle frame and driven by a motor to run. The front end of the roller body is higher than the rear end. The included angle between the roller body and the horizontal face ranges from 1 degree to 6 degrees. A feeding port is formed in the front end of the roller body. A discharging port is formed in the rear end of the roller body. A flame heater is installed in the center of the rear end of the roller body. The interior of the roller body is sequentially divided into a material scraping region, a material frying region and a high-temperature region from front to back. Material scraping blades are arranged on the section, corresponding to the material scraping region, on the inner wall in the roller body. The interior of the roller body is divided into the three regions, the front portion is the material scraping region, the middle portion is the material frying region, the rear portion is the high-temperature region, when passing through the regions of the roller, an asphalt regeneration mixture to be heated is effectively heated through flame hot air generated by a combustor to the temperature ranging from 120 DEG C to 180 DEG C from the original temperature ranging from 60 DEG C to 80 DEG C, a temperature increasing effect is obvious, the mixture is automatically discharged from the discharging port of the roller after the temperature of the mixture is increased, and therefore the mixture is used for stirring and laying of the rear portion of the regeneration machine.

Description

technical field [0001] The invention relates to an asphalt pavement construction device, in particular to a centralized heating drum for asphalt mixture used in a mobile in-situ thermal regeneration machine. Background technique [0002] Asphalt pavement hot-in-place regeneration technology uses special hot-in-place regeneration equipment to heat and rake the asphalt pavement, add a certain amount of new asphalt materials, regeneration agents, etc. , A technology to regenerate the old asphalt concrete pavement within a certain depth of the surface at one time. At present, there are existing asphalt pavement hot-in-place regeneration machines at home and abroad, and most of them use heating plates to heat the old asphalt mixture pavement with a thickness of 4-6 cm once, so that the surface of the asphalt pavement after heating reaches 250 ° C, while the bottom layer is only 50-70 ° C. The upper and lower temperatures of the recycled material are uneven, and the overall tempe...

AI Technical Summary

Problems solved by technology

At present, there are existing asphalt pavement hot-in-place regeneration machines at home and abroad, and most of them use heating plates to heat the old asphalt mixture pavement with a thickness of 4-6 cm once, so that the surface of the asphalt pavement after heating reaches 250 ° C, while the bottom layer is only 50-70 ° C. The upper and lower temperatures of the recycled material are uneven, and the overall temperature of the old asphalt recycled material is low after raking and mixing. Because the surface temperature exceeds 200°C, the surface asphalt will age, which will affect the quality of the recycled road surface.

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