SU1609843A1 - Drying-mixing drum of installation for preparing asphalt-concrete mixture - Google Patents

Abstract

The invention relates to the field of construction, namely to devices for the preparation of asphalt concrete and bitumen mineral mixes. The aim of the invention is to improve the quality of the prepared mixture and the intensification of its preparation. The housing 1 of the drying and mixing drum is divided by a transverse perforated partition 2 into a drying 3 and a mixing 6 section. Last located in the cavity of the drying section 3 with the formation of a thermal jacket 12 along its outer perimeter. Each bucket 5 is fixed on the partition 2 in front of the hole with the formation of the box. The transfer of dry and heated material to the mixing section 6 is carried out by reloading buckets 5, which prevent the bitumen from contacting hot gases. 2 Il.

Description

5 - 2 6 12 13 Iff

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The invention relates to the construction, in particular to devices for the preparation of asphalt-concrete and bitumen-mineral mixes.

The goal is to improve the quality of the prepared mixture and intensify its preparation.

FIG. 1 shows the drum section; in fig. 2 shows section A-A in FIG. one,

Drying and mixing drum contains a cylindrical body 1. divided by a transverse perforated partition 2 into a drying section 3, having blades 4 on the inner surface and reloading buckets 5, and a mixing section 6 with feed pipe 7 in the Idle, having nozzles 8, and a screw 9. On the end wall of the drying drum is installed the boot pipe 10 and the furnace device 11.

The mixing section 6 is located in the Cavity of the drying section 3 to form a thermal jacket 12, where screw blades 13 and compensators 14 are mounted for fastening the mixing section to the drying section. Each bucket 5 is fixed on the partition 2 in front of the hole 15 with the formation of the box. The heat jacket is in communication with the exhaust pipe 16, and the protruding end of the mixing section 6 is connected to the discharge pipe 17. The drum has a body rotation drive (not shown).

The device works as follows.

Pre-dosed mineral material is fed to the drying section 3 through the loading nozzle 10, where the moisture is evaporated and heated to operating temperature. The promotion of mineral material along the entire drying and mixing drum occurs due to the installation of the latter at an angle to the horizon. The material is dried and heated to the working temperature by means of reloading buckets 5 and is directed to the mixing section 6. There the screw 9

mineral powder is fed, and with the help of nozzles 8, bitumen is injected into the aggregate, the asphalt-concrete mixture is discharged through the discharge pipe 17. The heat jacket 12 that forms the shell of the drying and mixing sections serves to drain the flue gases from the drying section, and Their powdered mineral material, which they passed past the reloading buckets 5, is returned to the drying section by screw blades 13. Hot flue gases passing through the inter-chamber annular propellant

0

space, are natural

heating shell mixing section. The use of a drying and mixing drum makes it possible to significantly improve the quality of the prepared asphalt concrete mixture by eliminating the contact of bitumen with hot flue gases and to intensify the process of its preparation by introducing into the binder under

5 high pressure in a finely dispersed state.

Claims (1)

DETAILED DESCRIPTION OF THE INVENTION Drying and mixing drum of an installation for preparing asphalt concrete mixture, comprising a cylindrical body separated by a transverse perforated partition into an internal surface with overflow blades and reloading ladles of the drying section and mixing section with feed pipe into the drying section of the drying section , discharge and exhaust nozzles at the end of the mixing section, with water in the mouth of the housing, characterized in that, in order to and quality of prepared sme5 B and intensification of the process for its preparation, a mixing section located in the drying section of the cavity to form a thermal jacket on its outer periphery, and each bucket is fixed to Negotia rodke front of the hole to form a box. 15 FIG. 2