RU2519368C1 - Mixer for loose materials - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: mixer comprises loading and unloading units, a screw fitted by symmetrically set spirals with oppositely directed turns. Protrusions are provided on the inner surface of the screw casing. A sloping branch pipe with a cylindrical chamber is connected to the central part of the screw casing in the junction area of the spirals, a drum with circumferentially alternating solid and separate radial elastic elements is installed in the chamber. Skirting able of adjusting the inclination angle in respect to the vertical plane is mounted in the outlet area of the cylindrical chamber.

EFFECT: increased process efficiency at mixing of wet and liable-to-cohesion materials.

5 dwg

Description

The present invention is intended for use in the chemical industry, agriculture, the production of building materials and other industries.

Known mixer screw [RF patent No. 2290986], containing a shaft mounted on it the main feather of the screw, made perforated. In this case, the auger has an additional feather (solid or perforated) fixed to the shaft from the supply side of the mixed components or from the reverse side and having a winding in the direction opposite to the direction of winding of the main perforated feather. The additional feather serves to compensate for the axial back pressure created by the main feather on the components coming in for mixing, as well as to close all axial forces on the screw shaft.

The disadvantages of this unit include the low quality of mixing materials prone to sticking or having high humidity.

Closest to the proposed invention is a spiral auger mixer-spreader of mineral fertilizers [RF patent No. 2244395], containing loading and unloading devices, a screw having symmetrically arranged spirals with the opposite direction of the turns. Despite the fact that this apparatus is not intended for mixing bulk materials, it has structural similarities with the proposed invention and can be used for mixing.

The disadvantages of this unit include the complex design and low quality mixing of materials that are prone to sticking and have high humidity.

The objective of this invention is to provide an aggregate for mixing bulk materials, which allows to obtain homogeneous mixtures of materials, particles of one of which are prone to sticking together and agglomerating, as well as materials with high humidity, or having lumpy inclusions due to high humidity.

This object is achieved by the fact that in the aggregate for mixing bulk materials containing loading and unloading devices, a screw having symmetrically arranged spirals with the opposite direction of the turns, protrusions are installed on the inner surface of the auger body, connected to the central part of the auger body, in the docking area of the spirals inclined nozzle with a cylindrical chamber in which the drum is placed with alternating in the circumferential direction integral and separate radial elastic elements, and in the exit zone from ilindricheskoy camera mounted bump stop, with the tilt angle to the vertical plane.

Figure 1 shows the unit for mixing bulk materials.

Figure 2 shows a left view.

Figure 3 shows a top view.

Figure 4 and figure 5 shows the integral and separate radial elastic elements, respectively.

The unit for mixing bulk materials contains a loading device 1 and 2, an unloading device 3, a screw 4 having a symmetrically arranged spiral 5 and 6 with the opposite direction of the turns. The protrusions 7 are mounted on the inner surface of the screw housing.

In the central part of the screw, in the docking zone of the spirals, an inclined nozzle 8 is placed connected to the cylindrical chamber 9. A mixing device is installed in the inner volume of the cylindrical chamber, which is a drum 10 with alternating in the circumferential direction integral 11 and separate 12 radial elastic elements. To unload the mixture from the cylindrical chamber at the outlet, a chipper 13 is installed with the possibility of adjusting the angle of inclination. The screw drive is carried out from the electric motor 14 through the gearbox 15 and the chain gear 16. The drum 10 is driven into rotation from the electric motor 17.

The unit operates as follows.

Bulk materials to be mixed (including sticky, crumpled) are captured by spirals of the screw 5 and 6 in the lower parts of the loading devices 1 and 2 (hoppers with feeders) and transported to the central part - to the inclined pipe 8. At the beginning of the movement of materials in the screw occurs the destruction of large adherent agglomerates in their interaction with the protrusions 7, spirals 5 and 6 and the surface of the auger body. Also, the destruction of the stuck together pieces and the mixing of the two media occurs at the junction of the spirals 5 and 6, in the interaction of materials moving from opposite sides. Pre-mixing takes place in this zone.

Next, the mixture enters through an inclined pipe 8 into a cylindrical chamber 9, where the next phase of mixing takes place. Mixed components are captured by elastic elements 11 and 12 located on the surface of the rotating drum 10, accelerated and sprayed at high speed (10-20 m / s). The created stream hits the chipper 13.

When materials move in a mixing device in a cylindrical chamber 9, multiple alternating interactions of particles with elastic elements, both integral and separate, occur. In this case, the destruction of the remaining agglomerates and intensive mixing are observed.

Impact interaction of the mixture with the chipper 13 also helps to increase the uniformity of the mixture. Changing the angle of the chipper allows you to use this unit to mix different materials.

Thus, in the proposed unit, the mixing of materials occurs in three phases: in the area where the helix spirals descend, in the cylindrical chamber and upon impact with the bump.

The proposed unit for mixing bulk materials has a fairly simple design and is able to obtain homogeneous mixtures of components that are in the form of adherent structures, wet and having agglomerates.

Claims (1)

A unit for mixing bulk materials containing loading and unloading devices, a screw having symmetrically arranged spirals with the opposite direction of the turns, characterized in that protrusions are installed on the inner surface of the screw housing, and an inclined nozzle with a cylindrical chamber is connected to the central part of the screw housing in the area of the joining of the spirals in which the drum is placed with alternating in the circumferential direction integral and separate radial elastic elements, and in the exit zone from the cylindrical chamber a chipper is installed with the ability to adjust the angle of inclination to a vertical plane.

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