SU903453A1 - Apparatus for preparing asphalt-concrete mix - Google Patents

Description

(54) DEVICE FOR PREPARATION OF ASPHALT-CONCRETE MIXTURE

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The invention relates to road construction, in particular, to devices for the preparation of asphalt concrete mixtures.

A device for preparing an asphalt-concrete mixture is known, comprising a drying and mixing drum with a device for burning fuel, an inlet pipe for introducing the components of the mixture, an outlet pipe for the ready-mixed mixture, a gas outlet pipe and a drum 1 drive.

The closest to the invention is a device for preparing asphalt concrete mixture, including a driven drying and mixing drum with a firing device, blades of the drying and mixing sections, an inlet for intaled inert material, intakes for a consumable material and mineral powder, an outlet for the ready-made mixture and gas outlet pipe 2.

A significant disadvantage of these devices is the passage of the gaseous coolant over the mixing section of the drum, which leads to a decrease in the quality of the binder material, inefficient use of heat and eliminates the possibility of using low-melting adhesive materials and, as a result, the quality of asphalt concrete and the durability of the road surface.

The purpose of the invention is to improve the quality of asphalt and reduce heat loss.

The goal is achieved

10 by the fact that the device, including a driven dryer-mixing drum with a furnace device, blades of the drying and mixing sections, an inlet for the withdrawn inert material, intakes for the injected material and mineral powder, an outlet for the ready-mixed and an outlet for gas supplied with

20 is fixed inside the drum along the length of its drying section by a screen made in the form of a glass with a hole in the bottom connected to the furnace device and the inlet 25, and the blades of the drying section are placed on the inner surface of the cylindrical part of the glass, the village G1 of the middle is installed with a gap and connected with a drum with the help of hard links, and formed between

the cup and the drum space are communicated from the side of the flue device with the gas outlet pipe.

In this case, the rigid connections are made in the form of blades arranged along a helix.

Fig, 1 shows the device, a general view; figure 2 - section aa in figure 1.

The device has a dryer-mixing drum 1 with supports 2 and a rotation drive 3, an inlet 4 for loading the inert material with a doze, a furnace 5, an outlet for the ready-mix, fixed with a gap inside the drum 1 along the length of its drying section a screen in the form of a glass 7 with a hole in the bottom connected to the combustion device 5 and the inlet 4, connecting the glass 7 to the drum 1 hard links made in the form of helixes 8 arranged along the helix The inner surface of the drum 1 was pasture 9. Moreover, within its drying section, the blades 9 are placed on the inner surface of the cylindrical part of the bowl 7. The device also has a gas cleaning device including a cyclone 10, fan I, a wet cleaning stage 12 and an outlet pipe 13. The device is connected to the drum 1 by means of the gas outlet pipe 14 connected to the side of the furnace device 5 with a cavity formed by a gap between the cup 7 and the drum 1; To ensure operation of the device, equipment 15 is provided for storing, metering and supplying inert material, equipment 16 for storing, preparing and delivering a dose of talled material, equipment 17 for storing and dosing supplying mineral powder, and a hopper 18 for storing and delivering ready-made asphalt concrete to transport vehicles mixes.

The device works as follows.

The withdrawn inert material with the help of equipment 15 through the inlet 4 enters the inside of the glass 7, where it is subjected to heating and drying with the help of a gaseous heat carrier created by the furnace device 5. The drum 1 is rotated with the drive 1 and the blades 9 mounted on the inner surface of the glass 7, the inert material is moved along the drum 1 and mixed. When an inert material passes into the mixing area, it is introduced into the sheeting material and mineral powder with the help of equipment 16 and 17. Due to the rotation of the drum 1, the piling components are mixed and, in the form of a ready-mixed asphalt mixture, are transferred to the outlet nozzle 6 and further discharged into the hopper 18. The heat carrier gas flow, f, passes inside the cup 7, due to the position of the venting pipe 14 from the side of the furnace 5 turns the opposite direction and follows the gap between the Q 14 nozzle and drum 1, creating a thermal shirt around glass 7. At the same time, in order to avoid filling this gap with an inert material, as well as collecting and returning to the mixing area of the drum 1, dust-like

particles, the blades 8 are located along a helix.

The proposed device reduces the amount of dust entering the tent, prevents cold air from entering through the outlet and reduces the amount of mineral powder carried away and oxidation to the tarpaulin material, which improves the quality of asphalt concrete, reduces heat loss and consumption of tarpaulin material and mineral powder. In addition, it is possible to use lower flammability in the burning materials .j.

Claims (2)

Invention Formula h 5 1. Device for the preparation of asphalt concrete mixture, which includes a driven drying and mixing drum with a combustion device, loops of drying and mixing 0 plots, inlet for dosed inert material, inlets dosed into a binder and mineral powder, outlet for ready mix c And a gas outlet pipe, characterized in that, in order to improve the quality of asphalt concrete and reduce heat loss, it is provided with a screen mounted inside the drum along the length of its drying section, made in the form of a glass with a hole in the bottom, connected to the combustion device and the inlet pipe, and the blade the drying area is placed on the inner surface of the cylindrical part of the glass, the latter being installed with a gap and connected to the drum by means of rigid connections, and the formed between the glass and the drum is The space is reported from the side of the flue device with the vent pipe. 2. A device according to claim 1, characterized in that the rigid plies are made in the form of blades arranged along a helical line. Sources of information taken into account in the examination I. . “G. N, with EN-41 1, US Patent 3423222, cl. 106-278, 1969. 2. USSR author's certificate on application 2767967 / 29-33, cl. E 01 C 19/10, 1979. H h h h LL-.