초록 ▼

A rotary drier for plants for the production of bituminous macadams with the use of recycled materials comprises a hollow rotary cylinder (2), heating means (9) connected to one end (4) of the cylinder (2), an aggregates infeed section (7) connected to one end of the cylinder (2), a dried material o

A rotary drier for plants for the production of bituminous macadams with the use of recycled materials comprises a hollow rotary cylinder (2), heating means (9) connected to one end (4) of the cylinder (2), an aggregates infeed section (7) connected to one end of the cylinder (2), a dried material outfeed section (8) connected to the other end and an insertion section (24) for inserting recycled cut material into the cylinder (2), the insertion section being connected to an intermediate portion of the cylinder (2). The insertion section (24) comprises a plurality of radial openings (31) distributed circumferentially on the cylinder (2) inner surface (18) and covered by a covering structure (33) which also comprises a plurality of separator plates (34) circumferentially distributed along the cylinder (2) inner surface (18) so that between each pair of adjacent separator plates (34) there is at least one radial opening (31), the separator plates forming a plurality of first channels (35) for guided insertion of the cut material into the cylinder (2). There are also means (32) for feeding the cut material to the openings (31), said means being located on the outside of the cylinder (2). The covering structure (33) is fastened to the cylinder (2) inner surface upstream of the openings (31), extending in the material feed direction and is distanced from the cylinder (2) inner surface (18) downstream of the openings (31) for putting the openings (31) in communication with the inside of the cylinder (2).

대표청구항 ▼

1. A rotary drier for plants for the production of bituminous macadams with the use of recycled materials comprising: a hollow rotary cylinder (2) having a first end (3), a second end (4) and an axis of rotation (5) extending from the first end (3) to the second end (4) and, at least in operation, b

1. A rotary drier for plants for the production of bituminous macadams with the use of recycled materials comprising: a hollow rotary cylinder (2) having a first end (3), a second end (4) and an axis of rotation (5) extending from the first end (3) to the second end (4) and, at least in operation, being angled so that the first end (3) and the second end (4) are at different heights above the ground, the cylinder (2) having a predetermined direction of rotation; heating means (9) connected to the second end (4) of the cylinder (2); an aggregates infeed section (7) connected to the cylinder (2) at the end which in operation is highest above the ground, and a dried material outfeed section (8) connected to the cylinder (2) at the other end, inside the cylinder (2) a material feed direction being identified from the infeed section (7) to the outfeed section (8); and an insertion section (24) for inserting recycled cut material into the cylinder (2), the insertion section being connected to the cylinder (2) at an intermediate portion, and comprising a radial opening (31) made through the cylinder (2) lateral wall, means (32) for feeding the cut material to the opening (31) said means located outside the cylinder (2), and at least one covering structure (33) for the opening (31) fastened to the cylinder (2) inner surface upstream of the opening (31) relative to the material feed direction, and extending in the feed direction, the covering structure (33) being distanced from the cylinder (2) inner surface (18) downstream of the opening (31), relative to the feed direction, for putting the opening (31) in communication with the inside of the cylinder (2); the drier being characterised in that the insertion section (24) comprises either a plurality of said radial openings (31) distributed circumferentially on the cylinder (2) inner surface (18) and covered by the covering structure (33), or a single annular opening extending around the entire circumference of the cylinder (2) and circumferentially divided into a plurality of parts each forming an opening (31), also being characterised in that the covering structure (33) protects the opening (31) from aggregates arriving from the infeed section (7) so that mixing of the aggregates with the recycled material only takes place downstream of the covering structure (33) along the material feed direction, and in that the covering structure (31) also comprises a plurality of separator plates (34) circumferentially distributed along the cylinder (2) inner surface (18) so that between each pair of adjacent separator plates (34) there is at least one radial opening (31), the separator plates (34) forming a plurality of first channels (35) for guided insertion of the cut material into the cylinder (2). 2. The drier according to claim 1, characterised in that the separator plates (34) extend radially relative to the axis of rotation (5) along spiral trajectories centred on the axis of rotation (5) and have a first end side (36) towards the outfeed section (8) and a second end side (37) towards the infeed section (7). 3. The drier according to claim 2, characterised in that the covering structure (33) also comprises covering partitions (38) mounted over the openings (31), being distanced from them and connected to the separator plates (34). 4. The drier according to claim 2, characterised in that the separator plates (34) are positioned in such a way that during cylinder (2) rotation the second end side (37) of each separator plate (34) angularly precedes the first end side (36) of the same separator plate (34). 5. The drier according to claim 1, characterised in that the covering structure (33) is also equipped with guide and feed elements (39) for the material arriving from the infeed section (7). 6. The drier according to claim 5, characterised in that the guide and feed elements (39) are formed by the separator plates (34). 7. The drier according to claim 1, characterised in that the cut material feed means (32) comprise an annular chamber (41) made around the outside of the cylinder (2) at the insertion section (24), and pluralities of scoops (42) extending outwards from the cylinder (2) and distributed circumferentially along the outer surface of the cylinder (2), between each pair of adjacent scoops (42) there being an opening (31) or part of the annular opening (31), and a duct (43) for feeding the cut material to the annular chamber (41). 8. The drier according to claim 7, characterised in that the feed duct (43) opens into the annular chamber (41) at a side of the cylinder (2) which moves upwards during the rotation. 9. The drier according to claim 7, characterised in that the scoops (42) are angled relative to the cylinder (2) outer surface in the direction of the movement.