Thermal insulating device for pavement asphalt mixture stirring cylinder

Abstract

Relating to the field of road machineries, the invention provides a thermal insulating device for a pavement asphalt mixture stirring cylinder. An asphalt mixture can be stirred at a temperature of 160-180DEG C, below which the mixture quality can be affected. However, present stirring cylinders have no heating and thermal insulating device per se, and a hot material entering the cylinder can be cooled by a cold stirring cylinder. In order to avoid the disadvantage, the invention provides a technical scheme of sticking insulating pipes on the external wall of a stirring cylinder so as to realize preheating of a cold stirring cylinder or insulation during a continuous production process. The insulating pipes have a three-layer structure. The inner layer is a hot oil pipe layer, the middle layer is a rock wool insulating layer, and the outer layer is a cladding layer. The insulating pipes are arranged from the bottom to the top, then turned to one side and mounted from the top to the bottom, and then turned to the same side in order. And the hot oil pipe is loaded with heated heat conduction oil. The device of the invention has the advantages of high stirring efficiency, ensured asphalt mixture quality, compact equipment and low cost.

Description

technical field [0001] The invention relates to the field of road construction machinery, in particular to a mixing device for road asphalt mixture. Background technique [0002] The pavement asphalt mixture must be fully stirred at 160-180°C before construction, and the asphalt has been heated and melted before entering the mixing tank. Fully mix with the rest of the mixture in the mixing tank. The heat source in the mixing tank is heat transfer oil. Before mixing, the asphalt mixture and heat transfer oil are heated at the same time. When the asphalt mixture and heat transfer oil enter the cold mixing tank at the same time , the mixture will cool down, which will affect the quality of the mixture. To raise the temperature to the stirring temperature, it will take half an hour to heat up. In order to improve the working efficiency of the mixing tank and ensure the quality of the mixing material, it is necessary to increase the temperature of the mixing tank in advance to a...

AI Technical Summary

Problems solved by technology

Fully mix with the rest of the mixture in the mixing tank. The heat source in the mixing tank is heat transfer oil. Before mixing, the asphalt mixture and heat transfer oil are heated at the same time. When the asphalt mixture and heat transfer oil enter the cold mixing tank at the same time , the mixture will cool down, which will affect the quality of the mixture, and it will take half an hour to raise the temperature to the stirring temperature.

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