SU903455A1 - Apparatus for preparing asphalt-concrete mixes - Google Patents

Description

The invention relates to road construction, in particular, to devices for preparing asphalt concrete mixtures based on tar sand, as well as for regenerating asphalt concrete and drying sand and rubble.

A device for preparing an asphalt concrete pipeline is known, comprising a drum rotating by means of an actuator, on one end of which a furnace with a burner is mounted, and on the other is a chimney, the drum is made with internal and external cylindrical bodies rigidly interconnected, and has loading and unloading devices and exhaust valves located on the outer casing 1.

However, contacting with the drying of the material with a heated internal; KjDppusa drum does not allow high-quality preparation of the mixture, which reduces the efficiency of the device.

The closest to the present invention is a device for preparing an asphalt-concrete mixture, including an outer driving drum, rigidly fixed in it with an annular gap, a partially protruding inner drum with a firing device, located on the drums from the flue-side of the fins, Discharge hatch, bitumen brood and exhaust connection pipe mounted on the side opposite to the furnace fixture 2.

The disadvantage of this device is that the components of the mixture come into contact with the heated drum surfaces, and the prepared mixture is exposed to radiation from the flame, which leads to a decrease in the quality of the mixture and reduces the technological capabilities of the device, for example, using bituminous sand.

The purpose of the invention is to expand technological capabilities and improve the quality of asphalt concrete.

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The supply of the target is achieved by the fact that in the device, including the outer drive drum, rigidly fixed in it with an annular gap, it partially protrudes

30 internal drum with a furnace; located on the bar on the side of the furnace; loading hatches installed on the inner surface of the drum; blades mounted on the side opposite to the furnace; discharge hatch, bitumen and chimney; the outer drum is equipped with exhaust along its perimeter Klapa by us, and the inner one by a transverse shield fixed at the end with a lumen, the blades of the outer drum, placed above the inner drum curvilinear, and the blades of the inner drum and the outer part of the outer one - in the form of plates, some of which are installed with a slope in the direction opposite to the drum rotation, others are fixed radially and have successively bent ends at sharp and straight angles. In this case, each exhaust valve is made in the form of a hinged valve inside the bar, and the blades of the outer drum are installed with sequential alternation along its diameter, and on the inner one - along the diameter and its length. Figure 1 shows the proposed device, a General view with a longitudinal section; figure 2 - section aa in Fig, 1; on fig.Z - section bb in figure 1.: on fig. 4 is a section bb in FIG. 1; on fig.Z - section GG in figure 1. The device has a drive outer drum 1 installed obliquely in the direction of unloading, an internal drum 2 rigidly fixed in it with an annular gap, which partially protrudes outside and on which the combustion device 3 with a burner 4 and the charging port 5, made in the form of a bucket elevator with buckets, are mounted b, and the transverse shield 7, charging port 8 with buckets 9 of the outer drum 1 are fixed on the other end with the lumen; ai; inconsistent with the loading port 5 of the inner drum 2, the blades curvilinear in section 10 on the inner surface of the outer drum 1 above the drum 2, exhaust valves 11 with hinged 1 1 and inward of the drum 1 valves 12, opening the valves 11 located on the opposite side from the furnace 3 of the injection device 13, pipe 14 for feeding the discharge and unloading hatch 15, mounted on the inner drum 2 along its length, lifting blades that are filled in the form of plates 1b, 17 and 1 dimensional of which are inclined from the radial direction in the direction opposite to the a. bent at an acute angle (plate 17) and at right angles (plate 18). On the outer drum 1 there are mounted lifting blades 19, 20 and 21, similar to blades m 16, 17 and 18 of the inner drum 2, which are arranged with successive alternation in diameter and length of the drum, and the blades 19, 20 and 21 - with alternation only in diameter . The device works as follows. The air conditioned components of the mixture are fed through the loading hatch 5 into the inner drum 2, where they are captured by the blades 16 and dumped from them, moving to the side of the transverse shield 7. In this case, the crumbling of the prepared material from the blades 16 occurs in the initial zone of capture, from the blades 17 - in the center of the section, and with the blades 18, in the end zone, which ensures the creation of a continuous curtain over the section of the drum 2 and along its length. Stirring towards the discharge port, the components of the mixture are heated and dried. At the same time, tar sand or crushed old asphalt concrete is fed through the loading device 8 into the gap between the outer and inner drum, which is caught by the blades 10 and passes over the heated drum 2 without contact with it, and water vapor formed during the drying of the bituminous sand is partially drained through the exhaust valves 11, opening in the upper position under its own weight. Then all the components of the mixture are lifted by the blades 19, 20 and 21, forming a curtain of material into which bitumen is continuously introduced via conduit 14. The finished mixture leaves through the discharge port 15, and the exhaust gases through the exhaust device 13. The transverse shield provided in the device, mounted on the end of the inner drum, protects the finished mixture from the radiation effect of the burner flame and prevents bitumen from burning, curvilinear in section of the blade allowing dry the material without contact with the heated wall of the inner drum, preventing the reduction of the quality of the bitumen, the equipment of the outer drum with exhaust valves allows water vapor from the middle of the drum and to reduce the moisture saturation of the finished mixture, and the placement on the internal surfaces of the drums three kinds of lifting blades allows to create the curtain of material throughout the cross section of the drum that provides intensive tag & yuobmen between the coolant and the material.

The use of the device in practice will reduce the cost of preparing the asphalt mix.

Claims (3)

Invention Formula A device for preparing asphalt mixes, including an outer drive drum, rigidly fixed in it with an annular gap, a partially protruding inner drum with a firing device, located on the drums from the flue device, loading hatches mounted on the inner surface of the vane drums, mounted on the side opposite to the flue device A discharge port, a bit pipe and an exhaust port, characterized in that, in order to expand the technological capabilities and quality improvement of asphalt concrete, the outer drum is equipped with exhaust valves placed along its perimeter, and the inner drum is fixed at the end with a lumen the transverse shield, the blades of the outer drum, located above the inner drum, are curvilinear in cross section, and the blades of the inner drum and the rest of the outer drum are in the form of plates, some of which are mounted with an inclination in the direction opposite to the drum rotation, the others are fixed radially and have successively bent sharp and straight corners. 0 2. The device according to claim 1, p. L., Which is that each exhaust valve is made in the form of a flap valve that is hinged inside. 3. The device according to claim 1, distinguished by the fact that the blades of the outer drum are installed with a successive alternation of its diameter, and on the inner one - of its diameter and its length. 0 Sources of information taken into account in the examination 1. USSR author's certificate number 424941, cl. E 01 C 19/08, 1969. 2. US patent number 4165184, 5 cl. 366-12, 1979. S-f .. . " CDt / f.J 12