RU2332253C1 - Micro-additive mixer - Google Patents

Abstract

FIELD: technological processes.

SUBSTANCE: invention pertains to the technology of mixing micro-additives when making feed compound. The micro-additive mixer has a frame, on which a case is fitted. Inside the case there are three cylindrical containers, fixed one after the other, through which passes a central axle with paddle mixers fitted on it. The paddles are made from rods with a round cross-section and have an inverted L shape. All containers have discharge windows with a flap and opened using a handle. The case has a discharge window with a flap and a tray for unloading a ready mixture. Above the case there is a feeder for loading initial micro-additives and the mixture filler, divided into four sections. The smaller section of the feeder is joined by a flexible pipe to the smallest container of the mixer, and the biggest to the case. The rest of the containers are joined accordingly. The micro-additive mixer is actuated by a V-belt transmission from an electric motor. The invention provides for high degree of uniformity of the prepared mixture when adding micro-components to the mixture.

EFFECT: high degree of uniformity of the prepared mixture of feed compound when adding micro-components to the mixture.

1 dwg

Description

The invention relates to techniques for mixing microadditives in the preparation of animal feed.

Component mixers are known (for example, the USSR AS No. 1664384, MKI B01F 7/16, B.I. No. 27.07.07.91, the USSR AS No. 1653815, MKI B01F 7/18, B.I. No. 21 06/07/91, patent for invention No. 20099711, manual gearbox B01F 7/16, B01J 2/10, 03/30/1994), as well as an apparatus for mixing (AS USSR No. 1169719, MKI B01F 7/16, B01D 3/30 , B01D 11/04, B.I. No. 28.07.07.85).

These devices have several disadvantages: the required uniformity of the prepared mixture is not achieved, it is impossible to mix components with a small fraction in the recipe, continuous operation degrades the accuracy of the dosage of the components and compliance with the mixture recipe.

A known mixer (USSR AS No. 1664384, MKI B01F 7/16, BI No. 27 07/23/91), comprising a housing in which a vertical shaft with two tiers of blades attached to it is mounted with rotation. The blades of the upper tier are installed at an angle to the horizontal plane, and on their ends there is a reflector made in the form of a sleeve, the lower part of which is located between the blades of the upper and lower tiers, and the upper part protrudes above the blades of the upper tier by at least 0.01 sleeve length . The blades of the lower tier are installed opposite the blades of the upper tier with the opposite slope relative to the horizontal plane. The vertical shaft section is made variable, expanding down the cross section, and itself is connected via a belt drive to a drive motor.

The disadvantage of this type of mixer is the low quality of the prepared mixture, low working capacity with a low degree of filling of the tank, low productivity, the inability to distribute the mixture of components from micro-fractions in the formulation.

A known mixer (AS USSR No. 1653815, MKI B01F 7/18, B.I. No. 21 07.06.91) containing a cylindrical body, inside which is located a mixing device consisting of a rotating vertical shaft and rows mounted on it in height inclined blades having a concave working surface of a larger radius, which provides the most complete capture of the mixed components and creates a directed flow to the inclined reflectors. The blades are located at an angle of attack: the first 30 °, the second 35 °, the third 40 °, the fourth 45 °. Reflectors are rigidly fixed on the mixer body at angles of 45, 50, 55 and 55 °, the installation angles of the reflectors are strictly adjusted and can vary within 5 °.

The disadvantages of this mixer are the inability to obtain a mixture with high uniformity due to sudden changes in flow rates, high energy intensity of the process.

A known mixer (patent for invention No. 20099711, MCP B01F 7/16, B01J 2/10, 03/30/1994), comprising a vertical casing with nozzles for supplying raw materials and unloading the mixture, a drive shaft concentrically placed in the casing with blades mounted on it. The housing is made with the formation of barrel-shaped chambers placed one below the other, and the number of chambers is chosen equal to the number of mixtures obtained. Pipes for supplying feedstock are installed in the upper parts, for unloading the mixture in the lower parts and side walls of each of the chambers, and the blades are placed in each of the chambers. The nozzles for unloading the mixture are installed on the side walls and are placed tangentially relative to the mixer body.

The disadvantages of this mixer are the impossibility of distributing a mixture of components with micro-fractions in the formulation, the low quality of the prepared mixture.

Of the known closest in technical essence is a mixing apparatus (AS USSR No. 1169719, MKI B01F 7/16, B01D 3/30, B01D 11/04, BI No. 28 07/30/85), which contains a housing divided by shelves into sections, the central shaft with impellers mounted on it with blades located at an angle β, determined by the number of blades, discharge openings offset by an angle α, grinding bodies, fittings for feeding and unloading bulk materials, and a drive device, informing the central shaft of the reverse-rotational movement.

The disadvantages of the mixing apparatus are the low quality of the prepared mixture, the presence of high alternating inertial loads, leading to high energy consumption, complexity and metal consumption of the structure.

The claimed invention is aimed at eliminating the above-mentioned disadvantages of the known device. The following result can be obtained from its use: a high degree of homogeneity of the prepared mixture, incorporation of microcomponents into the prepared mixtures, the possibility of stepwise mixing and introduction of components that increase the uniformity of the mixture, and the possibility of use in the food industry for preparing mixtures of food products.

The specified technical result is achieved through the use of a microadditive mixer, containing a frame with a housing fixed on it, divided into sections, inside which a central shaft with agitators with blades mounted on it, and a drive device, the sections are made in the form of separate cylindrical containers, fixed in the case, having a different volume, with unloading windows, closing shutters, and in the lower part of each tank and case on the Central shaft mounted mixer, the blades of which made of round rods and have a L-shape, and on the case there is an unloading window with a shutter and a tray, in addition, a hopper with shutters is installed above the case, divided into sections, each of which is connected by a flexible hose to the corresponding container and mixer body ..

The remaining features of the inventive mixer of microadditives are private, since they characterize only the specific implementation of a particular part.

The drawing schematically shows a mixer of microadditives, a longitudinal section.

The microadditive mixer (see drawing) consists of a frame 1 on which a housing 2 is mounted, inside of which three cylindrical containers 3, 4, 5 are fixed sequentially, through which a central shaft 6 passes with agitators fixed on it with blades 7, the blades of which are made of rods of circular cross section and are L-shaped. All containers have unloading windows equipped with a shutter 8, which can be opened using handles 9, in addition, the housing 2 is equipped with a unloading window with a shutter 10 and a tray 11 for dispensing the finished mixture. A hopper 12 with shutters 13 for loading the original microadditives and a filler mixture, divided into four sections, is mounted above the housing 2, the small section of the hopper connected by a flexible hose 14 with the smallest capacity of the mixer 3, and the largest - with the housing 2. The remaining containers are connected respectively. The drive of the mixer of microadditives is carried out by means of a V-belt transmission 15 from the electric motor 16.

The operation of this mixer of microadditives is as follows: fill the sections of the hopper 9, observing the proportions of the components of the mixture in accordance with the recipe. In this case, the components that make up the mixture with a fraction of less than 2 ... 3% are considered microadditives, and the remainder as filler. Microadditives and part of the filler are poured into a small section of the hopper. The remaining sections of the hopper 9 are filled with other components of the mixture. The entry of components into the mixing tank 3 is carried out after opening the corresponding shutter 10 of the hopper. The components in the small capacity of the mixer begin to mix when a torque is applied to the central shaft 6 of the mixer with stirrers with blades 7 installed on it. The presence of centrifugal forces when the L-shaped blades act on the components helps to move the components of the primary mixture to the periphery of the tank, and then up its walls. The small cross-sectional area of the blade allows part of the primary mixture to accelerate in a circular motion, and part to the center, providing circulation of the material along the walls. The turbulent movement of the material improves the uniformity of the mixture. After mixing is completed, the primary mixture from the small tank 3 is discharged into the next 4, for which the corresponding shutter 8 of the small tank is opened using the handle 9, and the shutter 13 of the second section of the hopper also opens. As a result, the second container 4 of the mixer additionally receives the filler from the second section of the hopper and the primary mixture. After mixing the components, the resulting mixture enters the next tank 5, where a similar process is carried out. The mixture obtained in the last container 5 enters the housing 2, where the final mixing of the mixture takes place in the same way. The finished mixture is shipped when opening the shutter 10 on the discharge tray 11.

Increasing the uniformity of the distribution of microcomponents in the mixture is ensured by the stepwise mixing of the components (gradual distribution of particles of microcomponents in an increasing volume of the mixture), as well as the turbulent mixing mode in each tank due to the kinetic energy of the L-shaped agitator blades.

Claims (1)

A microadditive mixer comprising a frame with a housing fixed on it, divided into sections, inside of which there is a central shaft with agitators with blades mounted on it and a drive device, characterized in that the sections are made in the form of separate cylindrical containers fixed in the housing with different volumes , with unloading windows, closing shutters, and in the lower part of each tank and housing on the Central shaft mounted stirrers, the blades of which are made of round rods and having G-image I know the shape, and on the case there is an unloading window with a shutter and a tray, in addition, a hopper with shutters is additionally installed above the case, divided into sections, each of which is connected by a flexible hose to the corresponding container and mixer body.