RU2254909C2 - Device for mixing loose materials and viscous liquids - Google Patents

Abstract

FIELD: mixing loose materials and viscous liquids; chemical, food-processing and pharmaceutical industries.

SUBSTANCE: proposed device has reservoir with taper part and flexible members located along vertical axis of reservoir. Reservoir is turnable relative to horizontal axis and ends of flexible members may be shifted along vertical axis. Specification gives relationship for determination of length of flexible members.

EFFECT: enhanced efficiency.

2 cl, 7 dwg

Description

The invention relates to equipment for carrying out processes associated with the mixing of bulk materials and viscous liquids.

A known mixer containing a container with a flexible element inside, as a working body SU No. 1813540 Al, (01 F, 07.05.93. Bull. No. 17, the Production Association “Signal”, I. Khazanov, N. S. Klimov and V.V. Tkachenko).

The disadvantages of this mixer is that the mixing of the source material is uneven in capacity, as a result of which the mixture turns out to be heterogeneous.

Closest to the proposed one is an apparatus, the mixing organ of which is mounted in the housing on the shaft and made in the form of a tape containing twisted and not twisted sections and closed in a ring, with the formation of a conical shape SU 1690834 Al, (B 01 F, B 01 F, 15.11 .91. Bull. No. 42, Azerbaijan Institute of Energy named after I.G. Esman and the Center for the Methodology of Invention, V.A. Benedysek and A.A. - R. Mustafayev).

The disadvantages of this invention is that it is impossible to move large volumes without mixing inside these volumes, which reduces the intensity and quality of the mixture.

The technical task is to increase the efficiency of the mixing process.

The technical problem is achieved by the fact that the apparatus is equipped with a device for rotating the container relative to the horizontal axis.

Figure 1 shows a General view of the device in its original position (after loading the material). Figure 2 shows the arrangement of flexible elements in a longitudinal section, and figure 3 in a cross section of the device. Figure 4 shows a General view of the device in an inverted form and given a layout of flexible elements. Figure 5 shows the location of the flexible elements and material. 6 and 7 are diagrams for calculating the length of the flexible element, the extreme position of the drive and the length of its stroke.

The device consists of a container 1 (Fig. 1), flexible elements 2 located along the vertical axis of the container 1. Each of the elements 2 is connected to the container by one hinge 3 and the movement drive 4 by the other end. Capacity 1 due to bearings 5 has the ability to rotate about a horizontal axis. The rotation is carried out by mechanism 6. In the upper part of the tank 1 there is a loading hatch 7, and in the lower part there is a hatch for unloading 8.

The device operates as follows.

The starting powder components and the viscous liquid through the hatch 7 are loaded into the container 1. Flexible elements 2 are located as shown in figure 2, i.e. drive movement 4 is in the lower position (level II-II in figure 2). After loading, the hatch 7 is closed. Drive 4 the upper ends of the flexible elements 2 are moved to the upper position (level I-I in figure 2). With this movement, the flexible elements 2 come together (in FIG. 2 the extreme position is shown by a dotted line, and the direction of movement is indicated by arrows), and the powder components are forced into the gaps between the flexible elements, mixed. After the actuator 4 has moved to its highest position, the container 1, using the mechanism 6, rotates 180 ° around the horizontal axis in the bearings 5. The material rushes down under the action of gravity. The new position of the container and material is shown in figure 4. The actuator 4 is moved to its original position (Fig. 4 is shown by a dotted line). After that, the tank 1 is rotated to its original position. The processed material rushes down and occupies the area between the flexible elements 2 (figure 5), the cycle repeats. After mixing, open the hatch 8 and unload the mixture.

A positive effect - improving the quality of the mixture when mixing powdered materials with viscous liquids - is achieved by repeatedly forcing the treated mass through decreasing gaps between the flexible elements 2. The specified forcing is inevitable, because when you turn the tank 1 again, i.e. from the position shown in FIG. 2 to the position in FIG. 4, the mass of material necessarily falls into the region between the flexible elements 2 and when these elements are moved, i.e. when they come closer, the material is necessarily pressed into the gaps.

Part of the material may lie between the flexible elements. In this position, the movable ends of the flexible elements 2 are at the level III-III of figure 4, the actuator 4, these ends are moved to level IV. The position of the flexible elements 2 after movement is shown by the dotted line in figure 2. That part of the material, which was between the flexible elements 2, falls down and joins the main material.

When determining the length of the flexible elements, the extreme position of the actuator 4 and the length of its stroke, it is necessary to precipitate all the material from the space of volume V ₁ , enclosed between the flexible elements (the initial position of figure 2) in the free space of the mixer with a volume of V ₂ (at the other extreme position of the mixer, figure 4), i.e.

V ₁ = V ₂

Based on this equality and the geometry of the capacity, you can find the length of the flexible elements and the stroke of the drive (Fig.7).

The total length of the flexible member in position 2 is

l = l ₁ + l ₂ + l ₃

l is the total length of the flexible element;

l ₁ , l ₂ , l ₃ - the length of the plots.

The lengths of plots are respectively determined:

and the total length of the tank 1:

H = h + S + l ₂ ,

where D is the diameter of the tank;

h is the length of the conical part of the tank;

d is the diameter of the outlet fitting;

S is the maximum stroke of the drive 4.

The length of the capacity can be taken based on the ratio

l = 0.9 · H

Drive stroke

l _p = ll ₂ -h

To determine the width of the flexible element and their number, we use the fact that in the position of figure 2 in section I-I, the flexible elements form a circle, hence

π · d = π · S _e ,

where S _e is the width of the flexible element,

n is the number of elements.

To intensify the mixing process, flexible elements can be made in the form of a tape with holes. In this case, when moving the flexible elements from position II-II to position I-I (FIG. 2), the material is pressed not only between the flexible elements, but also through the holes in these elements, which significantly intensifies the mixing process. If the flexible element is a perforated tape with holes, the diameter of the holes of the perforation is equal to:

D ₀ = 0.84 · S _e ,

and the distance between the holes

h _e = 1.2 · S _e .

Claims (2)

1. A device for mixing bulk materials and viscous liquids containing a container with a conical part, an outlet fitting, flexible elements located along the vertical axis of the container, each flexible element is pivotally connected at one end to the container, and the other with a displacement drive having a piston, characterized in that the tank is equipped with a rotation mechanism relative to the horizontal axis, and the ends of the flexible elements are mounted to move using the drive along the vertical axis, and the length (l) of the flexible elements is determined depending l = l ₁ + l ₂ + l ₃ , where the length of the plot l ₁ is determined from the relation

the length of the plot l ₂ is determined from the ratio

the length of the plot l ₃ is determined from the ratio l ₃ = D / 2-d / 2, where h is the length of the conical part of the apparatus, D is the diameter of the apparatus, d is the diameter of the outlet fitting, S is the maximum piston stroke, while the piston stroke l _p is determined from the relation l _p = ll ₂ -h. 2. Device according to claim 1, characterized in that the flexible elements are in the form of perforated plates, wherein n number of plates and their width S _e defined by the relation n · S _e = π · d, the diameter of the perforation holes D _o = 0.84 S _e , and the distance between the holes h _e is determined from the ratio h _e = l, 2S _e .

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