RU38177U1 - MOBILE UNIT FOR PREPARATION OF THE AGGREGATED ASPHALT MIXTURE BEFORE STACKING - Google Patents

Description

Mobile unit for the preparation of aggregated asphalt mix before laying

The utility model relates to road construction, in particular to devices for preparing aggregated asphalt mixes before laying them in the coating.

A known installation of continuous operation for the preparation of asphalt concrete mixture, including a storage tank, a discharge device and a supporting frame on which a drying drum, a heating device in the form of an open flame burner are mounted, and a loading device (Kalashnikova T.N., Sokalskaya MB, Production of asphalt concrete mixtures. Textbook. M., ECON, 2001, p. 108, Fig. 5.1; 5.4).

The disadvantages of this installation include the use of an open flame burner for heating the asphalt mix, which leads to the burning of asphaltenes of cementitious materials, leading to a sharp decrease in the quality of the asphalt mix. During burner operation, as a result of combustion, light fractions evaporate. Vapors, together with dust from mineral material (crushed stone, gravel, aggregates), are removed from the dryer drum through a pipe along with smoke, which leads to environmental pollution. Also separate

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the design of the drying drum, mixer and storage tank leads to unreasonable heat loss and does not allow to maintain the optimal temperature regime when preparing the mixture, and also requires additional metal consumption.

The objective of the proposed solution is to eliminate the negative impact on the environment during the preparation of the asphalt concrete mixture, reduce the metal consumption of the structure, and ensure the optimal temperature regime when preparing the mixture.

The problem is solved in that in the known installation for the preparation of aggregated asphalt mix before laying, including a storage tank, unloading device and a load-bearing frame; on which a heating device, an intrusive drying drum and a loading device are mounted, according to a utility model, the heating device is made in in the form of electric heating elements, and the storage tank is made in the form of a rotatable storage drum rigidly connected to a drying drum and installed together with the unloading device on a supporting frame, at the same time rotary; the coiled drum-drive and drying drum have a single internal cavity and are equipped with double walls, between which are placed electric heating elements connected to an external power unit by means of sliding current collectors located on external surfaces of rotating drums.

The power and number of electric heating elements are selected depending on the required temperature regime.

A utility model is illustrated in the drawing, where in FIG. 1 shows a mobile installation, a general view; in FIG. 2 is a section AA in FIG. 1.

The installation comprises a supporting frame 1 and a drying drum 2 mounted on it, a storage drum 3, a loading 4 and an unloading 5 device. Rotary drums 2 and 3 are mounted on the frame 1 by means of supports 6, have a single internal cavity 7 and are equipped with double walls: internal 8 and external 9, between which there are electric heating elements 10. Heating elements can be made, for example, in the form of seamless pipes with placed inside them with spiral heaters. The drums 2 and 3 are equipped with blades 11, which are located on the inner surfaces of the walls 8 at an angle that allows you to move the mixture in the longitudinal direction inside the drums. The heating elements 10 are connected to an external power plant (not shown in the drawing) by means of current collectors 12 mounted on insulators 13 located on the drums 2 and 3. To rotate the drums, a gearbox 14 is located on the carrier frame 1. The carrier frame 1 can be placed on any transport means.

Installation works as follows.

electric heating elements 10, which heat the inner cavity 7 of the drums 2 and 3 until the design temperature inside the unit is reached, after which the cold aggregated asphalt mixture is loaded into the drying drum 2 through the loading device 4, where it is heated by the action of hot air and the heated walls 8 of the drum 2 and with the help of blades 11 is mixed, then the mixture enters the drum-drive 3, which is maintained in the set parameters of the temperature regime of the mixture. Wrap, storage drum 3 and blades 11 located therein provide uniform mixing of the mixture and change; its transfer to the unloading device 5.

Using the proposed installation eliminates the negative impact on the ecology of the environment, ensures the optimum temperature during the preparation of the mixture due to the location of all the working units on one carrier frame, and therefore improve the quality of the asphalt mix.

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Claims (1)

A mobile unit for preparing aggregated asphalt mix before laying, including a storage tank, an unloading device and a supporting frame on which a heating device, a rotary drying drum and a loading device are mounted, characterized in that the heating device is made in the form of electric heating elements, and the storage tank is made in the form of a rotating storage drum rigidly connected to the drying drum and installed together with the unloading a device on a supporting frame, while the rotating storage drum and the drying drum have a single internal cavity and are provided with double walls, between which are placed electric heating elements connected to an external power unit by means of sliding current collectors located on the outer surfaces of the rotating drums.