RU2843788C1 - Mixer - Google Patents

Abstract

FIELD: performing operations.

SUBSTANCE: invention relates to equipment for mixing of loose materials and may be used in lines for production of feedstuff and preparation of mixtures for feeding in agricultural production at livestock farms and complexes. Mixer consists of cylindrical housing, loading and unloading nozzles, combined working element consisting of external screw, middle screw, internal screw and additionally installed turns. Thus installing additional turns, the diameter, pitch and direction of the tape winding are equal to the diameter, pitch and direction of the middle screw tape winding, wherein turns are installed with offset of 90 degrees against the rotational path of the combined working tool relative to the turns of the middle auger and with an offset along the axis of the middle auger by 1/4 of the pitch of the middle auger belt beyond the vertical plane perpendicular to the axis of the middle screw and passing through the centre of the mixing chamber, allows to take and forcibly move material from the centre of the mixing chamber to its side surfaces and to mix the material more intensively.

EFFECT: improving the quality of the resulting mixture.

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Description

The invention relates to equipment for mixing bulk materials and can be used in feed production lines and the preparation of mixtures for feeding in agricultural production on livestock farms and complexes.

A mixer for bulk feed is known (utility model No. 179085), comprising a casing, a loading hopper and an unloading window. A shaft and a mixer are installed in the internal cavity of the casing. The loading hopper and the unloading window are installed in the upper and lower parts of the casing, respectively, along the vertical axis of its symmetry. The mixer contains spokes and blades. The spokes are rigidly installed on the shaft perpendicular to its geometric axis of rotation. The blades are made in the form of spiral screws of different diameters. Spiral screws of a smaller diameter are located inside spiral screws of a larger diameter. The winding direction of the spiral screws of a larger diameter starts from the edges of the casing and is directed toward the vertical axis of symmetry of the casing. The winding direction of the spiral screws of a smaller diameter starts from the vertical axis of symmetry of the casing and is directed toward the edges of the casing.

A mixer for mixing bulk materials is known (patent No. 2638978), consisting of a cup-shaped hopper mounted on a frame, loading and unloading pipes, a valve, a combined auger, a motor, and a gearbox. The walls of the cup-shaped hopper are made with a rounding of at least 60° in the upper part from the horizontal congruently with the radius of the ribbon spiral of the external auger.

The main disadvantage of the analogue and prototype is insufficient mixing of the material in the vertical plane located in the center of the mixing chamber perpendicular to the axis of the mixer shaft, where the material flows fed by the belts of the external and internal screws meet. The middle screw, moving the material from the center of the mixer to its end surfaces, also cannot ensure effective mixing in the center of the mixing chamber.

The technical task of the invention is to improve the quality of the resulting mixture by intensifying the process of mixing the components in the center of the mixing chamber in a vertical plane located perpendicular to the axis of the combined working element of the mixer.

The stated technical task of the invention is achieved due to the fact that in the center of the mixing chamber in the combined working element additional screw turns are installed, the diameter of which and the pitch value correspond to the diameter and pitch of the middle screw. The winding direction of the additionally installed turns coincides with the winding direction of the turns of the middle screw and, thus, facilitates the movement of the material from the center to the ends of the mixer. The turns are installed with an offset of 90 degrees against the rotation of the combined working element relative to the turns of the middle screw and with an offset along the axis of the middle screw by the value of 1/4 of the pitch of the belt of the middle screw beyond the vertical plane ( e is equal to 1/4 L), perpendicular to the axis of the middle screw and passing through the center of the mixing chamber. Installation of additional turns with a 90 degree offset of the winding start counter-rotating the combined working element relative to the turns of the middle auger allows for uniform and unimpeded picking up of a portion of material from the center of the mixing chamber and moving it toward the end surfaces of the mixer. Installation of additional turns by offsetting along the axis of the middle auger by 1/4 of the pitch of the middle auger belt and with an offset of 90 degrees counter-rotating the combined working element relative to the turns of the middle auger with the direction of the belt winding coinciding with the direction of the belt winding of the middle auger belt allows for picking up and forcibly moving the material from the center of the mixing chamber to its side surfaces, allows for more intensive mixing of the material and, thus, improving the quality of the resulting mixture.

Fig. 1 shows a general view of the mixer, Fig. 2 shows a general view of the mixer auger, Fig. 3 shows the installation of additional turns of the middle mixer auger.

The mixer consists of a cylindrical body 1, loading 2 and unloading 3 pipes, a combined working element 4 consisting of an external screw 5, a middle screw 6, an internal screw 7 and additionally installed turns 8. The additional turns 8 are installed in such a way that the beginning of the winding of the screws projects beyond the vertical plane 9 passing through the center of the mixing chamber and the rods 10 to which the belts of the external 5, middle 6 and internal 7 screws are attached, and perpendicular to the axis of the middle screw 6, by a distance e equal to 1/4 of the pitch L of the middle screw. The additional turns 8 are installed with an offset of 90 degrees against the rotation of the combined working element relative to the turns of the middle screw. The winding pitch of the additionally installed turns 8 is equal to the winding pitch of the middle auger 6. The winding direction of the additionally installed turns 8 corresponds to the winding of the tape of the middle auger 6.

The mixer works as follows.

The components of the mixture are poured through the loading branch pipe 2 into the cylindrical body 1 of the mixer, where they are mixed by the combined working element 4 and fed for unloading through the unloading branch pipe 3. The outer auger 5 and the inner auger 7 of the combined working element 4 move the material to the center of the mixing chamber. The middle auger 6 moves the material from the center of the mixing chamber to the end surfaces. The additionally installed turns 8, due to the displacement along the axis of the middle auger 6 by the value of 1/4 of the pitch of the turn of the middle auger 6 beyond the vertical plane perpendicular to the axis of the middle auger and passing through the center of the mixing chamber, and the displacement by 90 degrees against the rotational direction of the combined working element 4 relative to the turns of the middle auger 6, uniformly and freely take and shift the material fed by the outer 5 and inner 7 augers from the center of the mixing chamber toward the end surfaces of the mixer. This intensifies the process of material movement in the center of the mixing chamber and improves the quality of the resulting mixture.

The advantage of the proposed invention, compared to the prototype, is an increase in the efficiency of the process of preparing the finished product by improving the quality of mixing.

The installation of additional turns in this manner, the diameter of which, the pitch and the direction of the tape winding are equal to the diameter, the pitch and the direction of the tape winding of the middle auger, wherein the turns are installed with an offset of 90 degrees against the rotation of the combined working element relative to the turns of the middle auger and with an offset along the axis of the middle auger by 1/4 of the pitch of the tape of the middle auger beyond the vertical plane perpendicular to the axis of the middle auger and passing through the center of the mixing chamber, allows for the material to be taken and forcibly moved from the center of the mixing chamber to its side surfaces, allows for more intensive mixing of the material and, thus, an increase in the quality of the resulting mixture.

Claims (1)

A mixer for mixing bulk materials, consisting of a cylindrical body, loading and unloading pipes, a combined working element consisting of an external screw, a middle screw and an internal screw, characterized in that additional screw turns are installed in the combined working element, the diameter of which, the pitch and the direction of winding of the tape are equal to the diameter, the pitch and the direction of winding of the tape of the middle screw, wherein the turns are installed with an offset of 90 degrees against the direction of rotation of the combined working element relative to the turns of the middle screw and with an offset along the axis of the middle screw by 1/4 of the pitch of the tape of the middle screw beyond the vertical plane perpendicular to the axis of the middle screw and passing through the center of the mixing chamber.