RU2613045C2 - Vibration mixer - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to continuous-action devices for bulky compositions preparation. Vibration mixer comprises working member fixed on vertical tubular column, made in form of perforated helical chute, at bottom ending with continuous turn, ingredients feed branch pipe, located above working element, resilient element fixed on bearing structure, and vibrator, characterized by fact, that finished composition discharge branch pipe is installed at continuous turn end. Ingredients are coming to working element upper turn via feed branch pipe. Under effect of vibrations generated by vibrator, bulky material particles, moving down working element, are mixed. Finished product is removed from device from below via discharge branch pipe installed at continuous turn end.

EFFECT: technical result of invention is higher stability of vibration mixer operation and composition quality.

1 cl, 1 dwg

Description

The invention relates to continuous devices for the preparation of compositions from bulk materials and may find application in food, chemical, construction and other industries.

Known vibration mixer [1] with a vertical housing and a mixing body fixed inside it, made with a flat perforated screw surface and two perforated disks. One disk is located above the upper turn of the screw by an amount equal to its pitch, and the second, equipped with a diaphragm shutter, is located at the edge of the lower turn. A cover with a rod and a pipe for introducing ingredients is fixed on top of the device’s body, and a conical bottom with a pipe for outputting the finished mixture is attached to the bottom. The stem and outlet pipe are located in coaxial bearings with elastic elements. The vibrator generates power pulses, which are transmitted through the rod and body to the mixing body. At the same time, a special kinematic system, consisting of rods, crosses and sliders, provides it with the required helical vibrations to act on bulk material.

The disadvantages of the vibration mixer are the large dimensions caused by the presence of a conical bottom for directing the finished product to the outlet pipe, as well as the complexity of manufacturing and operation of the diaphragm shutter.

The closest technical solution is a vibration mixer [2] with a working body mounted on a vertical tubular column, made in the form of a perforated screw tray ending in a continuous turn from the bottom. The latter is necessary to collect the finished composition and its direction to the outlet pipe located between the perforated section and the solid under the movable plate. The mixer also contains a vibrator, elastic elements attached to the supporting structures, and a nozzle for introducing bulk ingredients mounted above the working body. To obtain a composition of a given quality, two flows of material are organized in the apparatus: the main one is sifting through the perforation of the tray; and auxiliary - rise along the turns for recirculation. The direction of movement of the bulk material and the ratio of flows are set by the vibrations created by the vibrator.

The disadvantages of the vibration mixer are the high instability of its operation and the quality of the composition. This is due to the fact that the consumption characteristics of the perforation of the working body are strongly affected by the height of the layer of material on the turns. With its increase, the productivity of the holes decreases significantly, and with a decrease it increases. In turn, it depends on the fluctuation of vibration parameters, the properties of the ingredients and the performance of the dosing equipment. For example, even a slight increase in the supply of ingredients to the upper turn of the mixer causes an avalanche-like rise in the layer height and its “choking” on it. With a decrease in feed - to "empty" the entire working body. In fact, the device operates in a state of "unstable equilibrium", which reduces the quality of the composition.

The technical result is to increase the stability of the vibration mixer and the quality of the composition. This is achieved by installing the exhaust pipe at the end of the lower continuous turn necessary to collect the finished composition. In turn, this made it possible to change the organization of the movement of dispersed material inside the apparatus. In the new design, the main flow of granular mass flows down the screw tray of the working body, and the auxiliary is sifted through the perforation.

In FIG. 1 shows a General view of the device.

The vibrating mixer contains a working body mounted on a vertical tubular column 1, made in the form of a perforated screw tray 2, ending at the bottom with a solid turn 3 (tray), at the end of which a pipe 4 of the finished composition is installed. The mixer is also equipped with an ingredient input pipe 5 located above the working body, an elastic element 6 mounted on the supporting structure 7, and a vibrator 8. From the outside, the helical surface can be limited by either a vertical side, as in FIG. 1, or a removable cylindrical casing (not shown).

Vibration mixer works as follows.

The vibrator 8 prompts the working body to perform spatial vibrations, for example screw, with the intensity necessary for the vibro-boiling layer of dispersed material to appear on the trays 2 and 3, as well as to create the main flow - the material is vibrated downhill. The elastic element 6 supports the specified oscillation parameters and vibration isolates the supporting structure 7.

The ingredients continuously or cyclically pass through the input pipe 5 (Fig. 1) to the upper turn of the perforated tray 2. As they move down the screw surface, they are mixed in a vibrating-boiling layer, reaching the required uniformity on the last lower continuous turn 3, which is also the bottom of the working body . The finished mixture is discharged from the apparatus through a pipe 4, installed at the end of the tray 3. Changing the vibration parameters, the properties of the ingredients and the performance of the dosing equipment, although it causes a slight change in the layer height, is not critical for the mixer. His work is stable, because the apparatus operates in a state of "stable equilibrium."

The sifting of the bulk composition through the holes of the tray 2 creates an advancing effect (slip). This auxiliary flow contributes to smoothing out the uneven flow of ingredients that are inevitably generated by dispensers, and averaging the composition of the mixture over the height of the working body. This is especially important when they are discrete-cyclic feed into the mixer. Another function of the holes is to compensate for the vacuum arising between the surface of the tray and the layer of material during its tear-off movement. The air is mainly sucked in through them, and when the layer falls, it is forced out through the holes and through the layer. Due to the similar pumping effect that occurs during the operation of the mixer, it is possible to reduce the vibration parameters at which the bulk mass begins to “boil”. This reduces power consumption.

Thus, the installation of the exhaust pipe at the end of the lower continuous turn of the working body made it possible to organize in a new way the movement of the dispersed material inside the vibration mixer, which stabilized its operation and the quality of the composition.

Sources of literature

1. USSR author's certificate No. 1472110, B01F 11/00, 1987, publ. 04/15/89. Bull.№14.

2. A.S. SU 1674943 A2, cl. B01F 11/00, publ. 09/07/91, bull. No. 33 (4685826/26 from 05/03/89).

SUBSTANTIATION of changes in terminology (material taken from explanatory dictionaries)

1. In the analogue and prototype the phrase “spiral gutter” is incorrectly used.

A spiral, in mathematics, is a curve that bends around a central point or axis, gradually approaching or moving away from it, depending on the direction of the curve.

At the same time, a screw (auger) is a cylinder with an inclined surface repeatedly wrapped around it. Those. this is an extended part.

The auger (from German Schnecke, literally - a snail) is a rod with a helical surface along the longitudinal axis. A helical surface (helicoid) is formed by a line simultaneously rotating uniformly around a fixed axis and moving along it. It does not have to be straight and perpendicular to the axis.

Tray - an open cross-section device for non-pressure movement of a liquid or suspension, as well as the movement of bulk or piece material.

The words “gutter” and “tray” are synonymous, but for reasons of harmony it is better to use the word “tray”. For example, a tray-type mixer. Sounds much rougher - the trough type mixer.

Therefore, the proposed technical solution uses the phrase "screw tray", most fully reflecting its essence.

2. Also in the analogue and prototype the phrase “compensating elements” and “shock absorbing elements” are incorrectly used, because they are designed to damp vibrations, which in the context of "maintaining oscillations" is false. You should use "spring elements" or "elastic elements". Springs (French ressort - spring), springs, torsion bars due to their elastic properties allow you to maintain the required vibration parameters with the lowest energy consumption.

In the text of the description of the invention, the phrase "elastic elements" is used.

Claims (1)

The vibrating mixer contains a working body mounted on a vertical tubular column, made in the form of a perforated screw tray ending in a continuous turn from below, an ingredient input pipe located above the working body, an elastic element mounted on a supporting structure, and a vibrator, characterized in that the finished output pipe composition is installed at the end of a continuous turn.

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