A raking device that can heat old asphalt concrete at the same time

Abstract

The invention discloses a harrowing device capable of simultaneously heating old asphalt concrete. The harrowing device comprises a chassis vehicle, wherein a pavement preheating system, a hot air heating and conveying system and a harrowing heating system are arranged on a rack of the chassis vehicle; the harrowing heating system comprises heating harrowing teeth which are arranged at the bottom of the rack, and the distance between the harrowing teeth and the ground is adjustable; the interiors of the heating harrowing teeth are hollow; the heating harrowing teeth can move along a direction parallel to the ground; the hot air heating and conveying system comprises a hot blast heater; pressurized hot air provided by the hot blast heater is conveyed to the heating harrowing teeth and acts on the ground from the interiors of the heating harrowing teeth; the pavement preheating system comprises a heating wall arranged at the bottom of the rack; the heating wall is positioned between the heating harrowing teeth and a cab; and the distance between the heating wall and the ground is adjustable. According to the harrowing device disclosed by the invention, the asphalt pavement is subjected to secondary heating and is heated from a deep layer, the heating effect is good, the efficiency is high, the resistance of the harrowing teeth is small during harrowing, the grading damage of asphalt aggregate is small, and the old asphalt mixture is recycled.

Description

technical field [0001] The invention relates to asphalt pavement heating and raking equipment in the technical field of asphalt pavement maintenance machinery, in particular to a raking heating machine capable of directly heating the deep layer of the asphalt pavement, heating and raking the asphalt pavement. Background technique [0002] In recent years, my country's highways have developed rapidly. After the asphalt pavement is put into use, various damage phenomena will appear under the combined effects of the vehicle and the external environment. In order to prolong the service life of the asphalt pavement and ensure the road performance of the asphalt pavement, timely Maintenance and repair of asphalt pavement. A large amount of waste asphalt mixture will be produced during the renovation of asphalt pavement. The waste asphalt mixture has certain use value. In order not to destroy the old asphalt mixture as much as possible to ensure the performance of the old asphalt mi...

AI Technical Summary

Problems solved by technology

[0003] The existing hot recycling equipment for old asphalt pavement preheats the asphalt pavement surface first, and then loosens the pavement; but because the asphalt mixture is a poor conductor of heat, the heat generated by the heating equipment is difficult to transfer from the asphalt pavement surface To the deep layer of the road surface, the temperature of the deep layer of the asphalt pavement can be appropriately increased by increasing the temperature of the heating equipment, but the surface of the asphalt pavement will cause fire and coking due to excessive temperature, and the temperature of the deep layer of the asphalt pavement can also be increased by prolonging the heating time. Will consume more fuel and reduce construction efficiency

[0004] If the temperature of the asphalt pavement is too low, it will not only greatly increase the resistance of the raking equipment and accelerate the damage of the equipment during the process of raking the asphalt pavement, but also easily destroy the original gradation of the asphalt mixture and reduce the performance of the mixture

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