RU2548419C1 - Vibration mixer - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: vibration mixer comprises a mixing chamber with material loading and unloading ports, a rotor with rotary drive fitted by blades, a vibrator with a corrugated casing being a corrugated thin-walled body of rotation that forms a truncated isosceles triangle in the vertical plane section by the corrugation peaks, and being rigidly fixed in the middle of the mixing chamber, with a vibration generation drive from a crank mechanism.

EFFECT: provision for homogeneous amplitude distribution of vibration field all over the mixing chamber volume, the field corresponds to the vibrator's corrugated casing by shape, simultaneously differently directed oscillations are generated and prevent the presence of dead zones in the mixing chamber, mixing process intensification.

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Description

The invention relates to devices for mixing concrete mixture and can be used in the construction materials industry, in construction and other areas of the construction industry for the production of multicomponent mixtures.

Currently, one of the urgent aspects of the development of the construction industry is monolithic construction, an important role in which is given to the preparation of concrete mixtures at the initial stage of production. Analysis of various sources makes it possible to detect the diversity of existing industrial concrete mixing machines implemented on the basis of machining in order to obtain high-quality concrete mixtures, i.e. getting them as uniform as possible in composition. The latter, in particular, makes it possible to distinguish the method of vibrational treatment of concrete mixtures, which has been tested by time and many scientific works, both in a single case and in conjunction with conventional mechanical activation.

The prior art various devices that are implemented on this basis.

For example, a rotary vibration mixer with a ring magnetostrictive transducer is known (Patent RU 2318586 C2, 03/10/2008, B01F 11/00), comprising a mixing chamber, a rotor with a rotary drive, made with blades, a vibrator, characterized in that the vibrator is made in the form emitting high-frequency vibrations of the pipe with the disk and is rigidly fixed in the middle of the mixing chamber.

The main disadvantage of this mixer is the ineffective vibrational study of the mixture or its complete absence in the upper corner (“deaf”) zones of the mixing chamber.

Also known is a rotary mixer with a mechanical vibration exciter (Patent RU 2297274 C1, 04.20.2007, B01F 11/00), comprising a mixing chamber, a rotor with a rotary drive, made with blades, a vibrator made in the form of disk springs with rubber shock absorbers, and rigidly fixed in the middle of the mixing chamber. The vibrator has a crank mechanism, with the help of which the Belleville springs excite particle vibrations in the horizontal direction. In the mixer, it is possible to adjust the intensity of the vibration by changing the speed of the drive of the crank mechanism.

The main disadvantages of this mixer include significant energy costs for the deformation of Belleville springs, a high percentage of wear of rubber shock absorbers, as well as insufficiently effective thixotropic destruction (dilution) of the material structure due to the excitation of vibrations of a strictly horizontal direction in the concrete mixture.

The prior art also knows a rotary mixer with an electromechanical vibration exciter (Patent RU 2292943 C1, 02/10/2007, B01F 11/00) containing a mixing chamber, a rotor with a rotary drive made with blades, a vibrator made in the form of a bellows with a disk, is rigidly fixed in the middle of the mixing chamber. The vibrator has an electromagnet, with the help of which the bellows excites particle vibrations in the horizontal direction. The mixer has the ability to adjust the intensity of the vibration by changing the frequency of the alternating current supplied to the winding of the electromagnet.

The disadvantages of this device include the ineffective vibrational study of the mixture or its complete absence in the upper corner (“deaf”) zones of the mixing chamber due to the geometry of the bellows strictly cylindrical in shape, as well as inhomogeneous amplitude values of movements decreasing from the place of force acting to the fixation point of the bellows, in each individual section of the bellows, as a result of which the fluctuations from the place of force impact to the place of fixation of the bellows will have a damping nature, which This leads to a decrease in the efficiency of vibration effects on the concrete mixture in the lower part of the mixing chamber.

The closest analogs are vibration mixers (Patent RU 2494795 C1, 10/10/2013, B01F 11/00; Patent RU 2494796 C1, 10/10/2013, B01F 11/00; Patent RU 2494797 C1, 10/10/2013, B01F 11/00; Patent RU 2494798 C1, 10/10/2013, B01F 11/00; Patent RU 2494799 C1, 10/10/2013, B01F 11/00; Patent RU 2494800 C1, 10/10/2013, B01F 11/00; Patent RU 2494801 C1, 10/10/2013, B01F 11/00; Patent RU 2494802 C1, 10/10/2013, B01F 11/00; Patent RU 2494803 C1, 10/10/2013, B01F 11/00; Patent RU 2494804 C1, 10/10/2013, B01F 11/00; Patent RU 2494805 C1, 10.10.2013, B01F 11/00; Patent RU 2494862 C1, 10.10.2013, B01F 11/00; Patent RU 2495710 C1, 10.20.2013, B01F 11/00; Patent RU 2496562 C1, 10.27.2013, B01F 11 / 00; Patent RU 2496563 C1, 10.27.2013, B01F 11/00; Patent RU 2496564 C2, 10.27.2013, B01F 11/00; Patent RU 2496565 C2, 10.27.20 13, B01F 11/00; Patent RU 2496566 C2, 10.27.2013, B01F 11/00; Patent RU 2496567 C1, 10.27.2013, B01F 11/00; Patent RU 2496568 C1, 10.27.2013, B01F 11/00; Patent RU 2496569 C1, 10.27.2013, B01F 11/00; Patent RU 2497665 C1, 11/10/2013, B28C 5/16, B01F 11/00; Patent RU 2497666 C1, 11/10/2013, B28C 5/16, B01F 11/00; Patent RU 2497667 C2, 11/10/2013, B28C 5/16, B01F 11/00) containing a mixing chamber with loading and unloading windows for materials and a rotor with blades. In the lower or lower and upper parts of the mixing chambers in the center, one or two vibrators are rigidly fixed, made in the bodies, with the excitation of vibration fields by means of the lower or lower and upper crank mechanisms. In this case, the vibrator bodies are made in the form of corrugated metal shells with different geometry of the bodies of revolution.

However, the main drawback of mixer designs is the lack of providing a combination of essential features of these devices with a new property, which consists in creating a vibration field or vibration fields corresponding to or individually shaped corrugated contour of a three-dimensional body of revolution, forming a truncated isosceles triangle in cross section of a vertical plane at the points of the corrugation vertices .

The technical result consists in expanding the arsenal of technical means and ensuring the achievement of new properties by the claimed objects. That is, it is possible to create a vibration field throughout the entire volume of the mixer chamber onto the mixed components of the concrete mixture that corresponds in shape to the corrugated contour of a three-dimensional body of revolution, forming a truncated isosceles triangle in the cross section of the vertical plane along the points of the corrugation vertices, with the simultaneous formation of multidirectional vibrations, completely eliminating in the mixing chamber of the “dead” zones, a uniform amplitude distribution of the vibration field in the mixing chamber and Qualitative intensification process mixing these components in general.

The technical result is achieved by the fact that a vibration mixer comprising a mixing chamber with loading and unloading windows of materials, respectively, a rotor with a rotation drive made with blades, a vibrator made with a corrugated body and rigidly fixed in the middle of the mixing chamber, with a vibration excitation drive from the crank the connecting rod mechanism, inside the vibrator case in the center in the horizontal plane, a disk with a guide rack is rigidly fixed, the function of which is to create a stable of the translational movement of the rod from the translational pair formed by the guide rack of the bottom of the mixing chamber and the rod, a crank mechanism, and a cylindrical protrusion made with the possibility of insertion and fixing along the inner diameter of the spring installed with the function of free compression / expansion in the glass, to the center of the upper the inner part of which is rigidly fixed to the rod, and to the center of the upper outer part is a pusher rigidly fixed at the other end to the inner upper part of the corrugated body and is made th with the function of excitation of oscillations of the upper part of the given case of the vibrator. In this case, four protrusions are symmetrically fixed along the outer cylindrical part of the glass, the function of which is to transfer the reciprocating motion to the disk, made with the possibility of uniform distribution of the vibration field from the upper to the lower part of the body by creating uniform amplitude values of the displacements of each point of the outer corrugation of the body, in the moment of compression of the spring all the way into the rubber gaskets made with the function of softening the collision of the protrusions with the disk. Moreover, the vibrator body is made in the form of a metal corrugated shell, which is a corrugated thin-walled body of revolution, forming a truncated isosceles triangle in the vertical plane section along the points of the corrugations, and made with the possibility of creating a vibration field corresponding in shape to the corrugated contour of this body of revolution, with multidirectional vibrations .

The invention is illustrated by drawings: figure 1 presents a diagram of a vibration mixer; figure 2 is an enlarged diagram of a vibrator of a vibration mixer.

The vibration mixer comprises a mixing chamber 1 with loading and discharge windows 2 of materials 3, respectively, a rotor 4 with a rotation drive 5, made with blades 6, 7, a vibrator 8, made with a corrugated body 9 and rigidly fixed in the middle of the mixing chamber, with an excitation drive from the crank mechanism 10. Inside the casing 9 of the vibrator 8, in the center in the horizontal plane, a disk 11 with a guide rack 12 is rigidly fixed, the function of which is to create a stable directional translational motion the rod 13 from the translational pair formed by the guide rack 14 of the bottom of the mixing chamber 1 and the rod 13, the crank mechanism 10, and the cylindrical protrusion 15, made with the possibility of insertion and fixing along the inner diameter of the spring 16, installed with the function of free compression / decompression in the glass 17, to the center of the upper inner part of which the rod 13 is rigidly fixed, and to the center of the upper outer part - the pusher 18, rigidly fixed with the other end to the inner upper part of the corrugated body 9 and made with the function th vibration excitation of the upper part of the casing 9 of the vibrator 8. At the same time, four protrusions 19 are symmetrically fixed along the outer cylindrical part of the glass 17, the function of which is to transfer the reciprocating motion to the disk 11, which is configured to uniformly distribute the vibration field from the upper to the lower part of the casing 9 by creating uniform amplitude values of the displacements of each point of the external generatrix of the corrugation of the housing 9, at the time of compression of the spring 16 until it stops in the rubber gaskets 20, made with the function of crushing the collision of the protrusions 19 with the disk 11. Moreover, the housing 9 of the vibrator 8 is made in the form of a metal corrugated shell, which is a corrugated thin-walled body of revolution, forming a truncated isosceles triangle in cross section of the vertical plane along the points of the corrugation vertices, and configured to create a vibration field corresponding to form the corrugated contour of a given body of revolution, with multidirectional vibrations.

The device operates as follows: first, the components of the concrete mixture, the composition of which is preliminarily selected, are loaded through the loading window 2 in layers into the mixing chamber 1 in the following sequence: sand is laid on the bottom of the mixer, then cement, after which crushed stone, lastly, is uniformly fed to the entire load the required amount of water. Then, the drive of the vibrator 8 and the drive 5 of the rotation of the rotor 4 with the blades 6, 7 are turned on. The drive 5 rotates the rotor 4 and the blades 6, 7, thereby mixing the prepared mixture. The pusher 18 through the cup 17 of the spring 16 and the rod 13 by means of a crank mechanism 10 performs reciprocating movements, thereby exciting vibrations of the upper part of the housing 9, made in the form of a metal corrugated shell, which is a corrugated thin-walled body of revolution, forming a vertical plane in cross section at the points of the corrugation vertices, a truncated isosceles triangle, and configured to create a vibration field corresponding in shape to the corrugated contour of the body rotation, with multidirectional vibrations. At the same time, when the spring 16 is compressed into the rubber gaskets 20 of the disk 11, the protrusions 19 transmit reciprocating motion to the disk 11, which thereby additionally excites vibrations of the middle part of the housing 9 and creates a uniform distribution of the amplitude values of the displacements of each point of the outer generatrix of the metal corrugated shell . After a specified time, the drive 5 of the rotor 4 and the drive of the crank mechanism 10 are turned off and the finished concrete mixture is discharged through the window 3 of the mixer housing 1.

In general, the device provides the possibility of creating the entire volume of the mixer chamber onto the mixed components of the concrete mixture of the vibration field corresponding in shape to the corrugated contour of the three-dimensional body of revolution, forming a truncated isosceles triangle in the cross section of the vertical plane along the points of the corrugations, with the simultaneous formation of multidirectional vibrations, completely eliminating the presence in the mixing chamber of “dead” zones, a uniform amplitude distribution of the vibration field in the mixing chamber The development and qualitative intensification of the mixing process of these components as a whole. This is due to the fact that, firstly, the vibrator body is made in the form of a metal corrugated shell, which is a corrugated thin-walled body of revolution, forming a truncated isosceles triangle in the vertical plane section along the points of the corrugations, and made with the possibility of creating a vibration field corresponding to the shape of the corrugated contour of a given body of revolution, with multidirectional vibrations, allows, on the one hand, to realize the possibility of creating a mixer throughout the chamber on the mixed components of the concrete mixture of vibration exposure, which completely eliminates the presence of “dead” zones in the mixing chamber, and on the other hand, eliminates the vibration effect on the vibrator drive, maximally protect the bearing assemblies of the vibrator drive from the ingress of small particles of mixed materials, and also realize the possibility full transmission of “useful” vibrational impact on the processed material. Secondly, the implementation in the design of the vibrator of the mechanism, which includes a pusher, a cup with protrusions, a spring, a rod of the crank mechanism and a disk with rubber gaskets, ensures the creation of uniform amplitude values of the displacements of each point of the outer generatrix of the metal corrugated shell, thereby allowing uniform distribution of the vibration field in the mixing chamber and high-quality intensification of the mixing process of the mixture components. And thirdly, the design of the mixer allows one to realize an increase in productivity, lower energy consumption for the mixing process, increased mobility and turbulization of the mixture due to uniform thixotropic destruction of the material structure in the entire space of the mixing chamber, which is manifested in a decrease in the specific resistance to movement of the blade in the concrete mixture compared with specific resistance to the movement of the blade of non-destroyed material. In this regard, the resistance to movement of the blades and the power consumption of the rotor rotation drive are reduced. At the same time, the effect of boiling of the mixture under the influence of oscillatory processes of the vibrator body, greater turbulization and more intensive circulation of the particles of the mixture is achieved, as a result of which the mixing time is reduced, the mixer productivity is increased.

The claimed invention exhibits new properties not known in the art. The essential features are technical in nature and are identifiable. The set of essential features of the claimed device is necessary and sufficient to obtain the required technical result. The claimed combination of features provides an unexpected, unusual ultramodern technical result that exceeds the technical result obtained from each significant feature separately in relation to objects of the specified purpose. The inventive object provides a change in the prior art by non-obvious means, gives the objects new positive properties, satisfies long-term demand and increases the competitiveness of the patented object. Between the essential features of the claimed decision and the achieved technical result, there is a causal relationship. The set of essential features of the proposed solution provides a new unusual principle of operation of objects, which is as effective as possible for objects of this purpose.

Claims (1)

A vibration mixer comprising a mixing chamber with material loading and unloading windows, respectively, a rotor with a rotation drive made with blades, a vibrator made with a corrugated body and rigidly fixed in the middle of the mixing chamber, with an excitation drive from the crank mechanism, inside the vibrator body in the center in the horizontal plane, a disk with a guide rack is rigidly fixed, the function of which is to create a stable directional translational movement of the rod from the post a pair formed by a guide rack of the bottom of the mixing chamber and the rod, a crank mechanism, and a cylindrical protrusion made with the possibility of insertion and fixing along the inner diameter of the spring, installed with the function of free compression / expansion in the glass, to the center of the upper inner part of which is rigidly fixed rod, and to the center of the upper outer part - the pusher, rigidly fixed with the other end to the inner upper part of the corrugated body and made with the function of excitation of oscillations of the upper parts of this vibrator housing, while four protrusions are symmetrically fixed along the outer cylindrical part of the glass, the function of which is to transfer the reciprocating motion to the disk, made with the possibility of uniform distribution of the vibration field from the upper to the lower part of the housing by creating uniform amplitude values of the displacements of each point of the outer forming the corrugation of the body, at the time of compression of the spring to the stop in rubber gaskets made with the function of softening the collision of the protrusions with the disk characterized in that the vibrator body is made in the form of a metal corrugated shell, which is a corrugated thin-walled body of revolution, forming a truncated isosceles triangle in the cross section of the vertical plane at the points of the corrugation vertices, and configured to create a vibration field corresponding in shape to the corrugated contour of this body of revolution , with multidirectional vibrations.

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