RU2550193C1 - Mixer of bulk materials - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: mixer of bulk materials containing loading and unloading devices, fixed casing, in it a shaft with spraying nozzle is installed, the nozzle is coaxial cone chambers with the connected to them internal and external spraying channels located coaxially. The spraying channels are of different length, at that the internal channels have larger length, and in casing the baffle is installed made out of two coaxial rings, two which two rows of the elastic material are connected with clearance, the rows are in form of the cone surface.

EFFECT: invention improves efficiency of mixing.

2 dwg

Description

Bulk material mixer

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

A known unit for mixing and sealing bulk materials containing dispensers, an unloading device, a housing, a drive hollow shaft located in the housing, spraying devices attached to the shaft and a conical baffle element, and a sealing chamber is located in the lower part of the housing [RF Patent No. 2311222].

The disadvantages of this device include the complexity of the design and the low quality of mixing.

Closest to the proposed invention is an aggregate for mixing bulk materials [RF Patent No. 2464079], containing loading and unloading devices, a fixed housing, in the internal volume of which there is a shaft with a spray nozzle, which is a coaxial conical chamber provided with spray channels located coaxially.

The disadvantages of this unit include the complexity of the design, the low quality of mixing caused by the separation of the mixture upon impact with the bump element (housing wall), as well as the inability to mix components that differ in size, shape and density.

The objective of the invention is the creation of a mixer of bulk materials of a relatively simple design having high quality mixing.

The problem is achieved in that in the mixer of bulk materials containing loading and unloading devices, a stationary housing, in the internal volume of which there is a shaft with a spray nozzle, which is a coaxial conical chamber, with internal and external spray channels connected to them, located coaxially that the spray the channels are made of different lengths, and the internal ones have a large length, and a baffle element is made in the body, made of two coaxial rings, to which two rows of elastic material are represented with a gap, which are conical surfaces.

In FIG. 1 shows a diagram of a mixer of bulk materials, FIG. 2 shows a section aa.

The bulk material mixer contains a fixed housing 1, a loading device 2 and an unloading 3, a shaft 4 provided with a drive 5. A spray nozzle is installed on the shaft, consisting of coaxial conical chambers 6 and 7, equipped with spray channels 9 and 10.

A bump element made of two rings 11 and 12 is attached to the side surface of the housing (inner), between which two rows of elastic material (fabric) 13 are stretched.

The mixer bulk materials works as follows.

The bulk components to be mixed come from the loading devices 2 into the internal cavities of the coaxial conical chambers 6 and 7. When the spray nozzle rotates, the materials are sprayed through the spray channels 9 and 10 under the action of centrifugal forces. The dispersed flows formed with the required shape and structure interact. During the interaction of the flows, they overlap, and at a certain distance from the spray nozzle, almost complete coincidence of the distribution parameters of the particles of the mixed materials is observed, which leads to the formation of a homogeneous mixture.

In order to prevent separation of the formed mixture, its interaction is organized with a breaker element made of two coaxial rings, to which two rows of elastic material representing conical surfaces are connected with a gap. In the interaction of particle flows with an elastic material, an inelastic impact takes place, and the formed mixture is sent to the discharge device.

The implementation of the baffle element in the form of two rows of elastic material allows you to almost completely eliminate the presence of reflected flows and dampen the vibration of the material (fabric). Placing elastic material between two rings, the lower of which has a larger diameter, allows for directed movement of the mixture into the lower part of the body - to the discharge device.

Due to the fact that when spraying components whose particles differ in physical and mechanical properties (size, shape, density), the formed dispersed flows have different opening angles, the internal spray channels have a greater length than the external ones. When dispersing the material, the dispersed stream of which has a larger angle, through elongated channels, complete overlapping of flows is achieved, which is impossible in a similar apparatus with channels of equal length.

As an elastic material, rubber or fabric having elastic properties can be used. The choice of the type of elastic material is determined by the physicomechanical characteristics of the mixed components.

So when mixing components whose particles differ in size (sand and cement), elastic elements made of rubber should be attached to the coaxial rings of the breaker element. The use of rubber as an elastic material will ensure an inelastic impact and direct the formed mixture to the discharge device, preventing its separation.

Claims (1)

A bulk material mixer comprising loading and unloading devices, a fixed housing, in the internal volume of which there is a shaft with a spray nozzle, which is a coaxial conical chamber with connected internal and external spray channels located coaxially, characterized in that the spray channels are made of different lengths moreover, the internal ones have a large length, and in the case there is a baffle element made of two coaxial rings to which two rows are connected with a gap elastic material representing a conical surface.

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