SU1407528A1 - Apparatus for preparing mixtures from fine fraction materials - Google Patents

Description

ten

15

20

25

The invention relates to technological equipment, in particular, to devices for the preparation of dry small fraction powders of mixtures, and may find application in the food, chemical, pharmaceutical industry, for the preparation of compound feed, cementing and plugging dry mixtures used in drilling wells, in construction industry. materials and other business activities related to the production of dry multicomponent products.

The purpose of the invention is to improve the quality of the mixture with an increase in the specific productivity of the device, while longitudinal and transverse mixing is intensified.

FIG. 1 shows the proposed device, axonometric, figure 2 - the same section; in fig. 3-5 shows various embodiments of the inner shell and its cone-shaped nozzle in FIG. 6-9 - sweep of the inner shells with different versions of the holes; in fig. 10-14 versions of the flaps.

thirty

The device consists of a housing 1, made in the form of a cylinder, a cone or another rotational body with a vertical axis 2, through which the drive shaft 3 passes, transmitting the rotation from the engine 4 to the working body 5.

Case 1 is overlapped on top with a flat horizontal plate 6, on which dispensers 7 are installed with the initial, components 8 of the mixture. The dispensing pipes 9 of the dispensers 7 through the horizontal platform 6 pass into the internal cavity 10 of the housing 1. Immediately under the dispensing nozzles 9 of the dispensers 7 in the inner cavity 10 of the housing 1 an outer conical shell 11 of the pre-agitator 12 is placed rigidly mounted on the drive shaft 3. In the inner cavity of this outer conical shell 11 there is an inner shell 13 with holes 14 on the side surface 15. The inner conical shell 13 is rigidly fixed to the housing

35

45

50

The nozzle 16 of the inner shell 13 may have a corrugated surface 18 or triangular notches 19,

The holes 14 of the inner shell 13 can be made in a spiral in the form of trapezoidal slits 20, in circular 21, in the form of triangular notches 22 or in the form of rectangular windows 23 These through openings can be equipped with flaps 24 of various shapes: oblique 25, straight 26, triangular 27, inclined 28, etc.

The inner shell 13 can be attached to the housing 1 by means of a screw pair 29 or other similar device for adjusting the size of the gap 30 between the cone-shaped nozzles 16 and 17.

The nozzle 17 in the lower part passes into a cylindrical nozzle 31, covered with a socket 32 of a fixed nozzle 33, in which the working body 5 is placed.

The device works as follows. I

Adjust the dispensers 7 for a certain capacity, providing a mixture of a given composition, and fill the hoppers of the dispensers 7 with the source components 8. After that, the engine 4 is connected, the drive shaft 3 and, accordingly, the working body 5 and the outer conical shell 11 are rotated 12 for pre-mixing. Then simultaneously include all dispensers 7 containing the starting components 8 of the mixture. These components of the mixture along the inclined walls of the conical shell 11 thin layers slide to the nozzle 17, forming a multilayer mass of the original components spirally placed one above the other layers, which is a mixture of components in the form of thin multiple (by the number of revolutions of the drive shaft) layers.

Part of the mass of the mixture accumulated in the inner cavity of the conical shell 11, through the gap 30 between the nozzles 16 and 17, slides into the nozzle 31, then into the nozzle 33, in which it is processed by the working body 5. Another part of the material (pain and in the lower part has a cone - sha) accumulates in the interior

five

0

five

0

d

five

five

0

The nozzle 16 of the inner shell 13 may have a corrugated surface 18 or triangular notches 19, |

The holes 14 of the inner shell 13 can be made in a spiral in the form of trapezoidal slits 20, round 21, in the form of triangular notches 22 or in the form of rectangular windows 23. These through openings can be equipped with flaps 24 of various shapes: oblique 25, straight 26, triangular 27, inclined 28, etc.

The inner shell 13 can be attached to the housing 1 by means of a screw pair 29 or other similar device for adjusting the size of the gap 30 between the cone-shaped nozzles 16 and 17.

The nozzle 17 in the lower part goes into a cylindrical nozzle 31, covered by the bell 32 of the fixed nozzle 33, which houses the working body 5.

The device works as follows. I

Adjust the dispensers 7 for a certain capacity, providing a mixture of a given composition, and fill the hoppers of the dispensers 7 with the source components 8. After that, the motor 4 is connected, the drive shaft 3 and the working body 5 and the outer conical shell 11 of the rotation 12 are rotated for pre-mixing. Then simultaneously include all dispensers 7 containing the starting components 8 of the mixture. These components of the mixture along the inclined walls of the conical shell 11 thin layers slide to the nozzle 17, forming a multilayer mass of the original components spirally placed one above the other layers, which is a mixture of components in the form of thin multiple (by the number of revolutions of the drive shaft) layers.

Part of the mass of the mixture accumulated in the inner cavity of the conical shell 11, through the gap 30 between the nozzles 16 and 17, slides into the nozzle 31, then into the nozzle 33, in which it is processed by the working body 5. Another part of the material (large) accumulates in the inner

a different nozzle 16. External shell 11, also in the lower part is equipped with a cone-shaped nozzle 17.

the shell end 11, since the gap 30 is preliminarily established with the aid of a screw pair 29 such that

no more than 15–20% of the mass delivered by the dispensers 7 passes through it. When the height of the material layer in the shell 11 reaches the level of the first hole 14 on the side surface 15 of the inner shell 13, some of it begins to spill into this opening and first falls on the inner surface of the nozzle 16 on the surface of the nozzle 17, where it is mixed with a part of the material that has passed through the gap 30, and then through patch 31, the mixture passes into the nozzle 33, where it is mixed by the working body 5. But since the first hole in height of the shell 13 also passes the thickness to the part (about 10-15%) of the mass coming from the dispensers 7, then in the shell 11, the accumulation of the layered mixture continues, which as it accumulates begins to spill through all above-arranged holes 14 on the side surface 15 of the inner shell 13, in which from the openings of different levels, the material flows are mixed and in the described way fall under the action of the working body 5.

0

Thus, the working body 5 simultaneously receives portions of the material from different levels of mass in the shell 11, i.e. received for processing from dispensers 7 at different times, which provides longitudinal mixing of the mixture. It is precisely the improvement of the quality of the longitudinal mixing that should be promoted by various versions of the holes 14 in the inner casing 13, which are selected depending on the number of components, their particle size distribution and

5 other physical and mechanical properties.

By mixing the mixture by the pepper is carried out by the shape of the cone-shaped nozzle 16, the flaps 24 and the working body itself 5.

The higher the speed of rotation of the conical shell 11, the better the resulting mixture, as the thickness of the spiral layers of the components decreases, however, the speed of rotation of the conical shell 11 is limited by the conditions of occurrence of centrifugal forces that are not in the pre-mixing device. permissible.

0

Fi.z

Wi / lZ

Fig

FIG. five

20 lit

F1L1.6

7 "/

f //. 7

Schig.8

fig 9

iitjtr

/ 7

Fi2.10

p yy

73

2U

FIG. eleven

Fig.p

gSh5

 S

fj

 d.11

C) i, 1

Claims (7)

1. DEVICE FOR PREPARING MIXTURES FROM FINE-FACED MATERIALS, comprising a vertical housing, over which dispensers of initial components are mounted, and a device for pre-mixing, placed in the EP housing under the issued nozzles of the dispensers, as follows: in order to improve the quality of the mixture while increasing the specific productivity of the device, the device for pre-mixing the components is made in the form of two coaxial conical shells, the outer of which is installed it is rotatable and faces upward with a large base, while the inside has an aperture, is mounted with the possibility of axial movement and faces upward with a smaller base, while the shells in the lower part are equipped with tapering conical nozzles. 2. The device according to claim 1, which consists in that, in order to intensify longitudinal mixing, the conical nozzle of the outer shell is made with a large taper angle and with a smaller central hole than the conical nozzle of the inner shell. 3. The device according to claim 1; characterized in that, in order to intensify the transverse mixing, the cone-shaped nozzle of the inner shell is corrugated. 4. The device according to paragraphs. 1 and 3, characterized in that the lower end of the inner cone-shaped nozzle is made with triangular cuts. 5. The device pop. 1, characterized in that the holes in the inner shell are made round or in the form of rectangular, triangular or trapezoidal cuts. 6. The device according to claim 5, characterized in that the holes are made in a spiral. • 7. The device according to claim 1, wherein the inner shell is provided with flaps fixed to the outer edges of its holes. SU <, „1407528 A1