RU2296001C1 - Apparatus for agitating of moisture-containing mixtures - Google Patents

Abstract

FIELD: agitating technique for preparing of solutions, emulsions, suspensions and compositions of wet materials used in chemical, food-processing, construction and other branches of industry.

SUBSTANCE: agitating apparatus has reservoir, agitator with working parts and drive with shaft. Agitator has upper and lower working parts. Lower working part is mounted on drive shaft with wooden slider bearing, and upper working part is provided with openings and is connected to hydraulic cylinder drive. Upper and lower working parts are connected to one another through guides made in the form of vertical rods rigidly fixed on lower working part and extending through openings in upper working part, said rods being designed for agitation of mixtures and for moving of upper working part through height of reservoir.

EFFECT: provision for producing large volumes of homogeneous mixed mass for minimal operating time of agitation apparatus.

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Description

The invention relates to devices for mixing, intended for the preparation of solutions, emulsions, suspensions and compositions of wet materials, and can be used in chemical, food, construction and other industries.

A known mixer for viscous materials, comprising a housing, means for loading and unloading, a cover-piston, a mixing blade, a shaft with a bracket mounted with the possibility of vertical movement when unloading the mixture, a rod, a blade installed with the possibility of interaction when the shaft rotates with the inner surface of the bracket (Patent of the Russian Federation RU 2120331 C1 of 10.20.1998). The disadvantage of this mixer is the inability to completely unload the mixture from the area of the bracket and blade. The material remaining during mixing may harden and hinder further use of the mixing device. The use of the unloading hole as the supporting surface of the mixer shaft leads to intensive wear of the rubbing surfaces and, as a result, to the leakage of the component from the tank during prolonged operation of the supporting surface.

A device for stirring is known, comprising a tank movably mounted in racks, a mixer with working bodies in the form of blades, and an oscillating drive for deflecting the tank with a mixer (Patent of the Russian Federation RU 2214303 C1 of 10.20.2003).

This constructive solution is not effective due to the fact that when the tank moves with a rotating mass, there are two types of movement - relative and portable. In this case, as is known from theoretical mechanics, an additional dynamic force will inevitably arise due to the Coriolis acceleration (Coriolis force), which is determined by the well-known dependence:

F = m · (2 · w · V),

where m is the mixed mass; w is the angular velocity of the mixer;

V - linear speed when swinging.

From the above formula it can be seen that at significant speeds and a large mass, the Coriolis force will be very large. Due to the fact that the direction of the swing velocity vector changes, the direction of the Coriolis force vector will also change. Due to the effect of this force, the support nodes (bearings) of the device and other details will collapse very quickly, in particular the blades and their attachment points to the mixer shaft.

At low speeds of rotation and rocking, it is impossible to quickly prepare a homogeneous consistency with a significant mixture, and this mixing device is functional only when mixing small weight doses of the mixture or low speeds of the working bodies.

The present invention is to obtain a homogeneous mixed mass of large volume for a minimum operating time of the mixing plant.

This technical result is achieved by the fact that in the mixing device containing a tank, a mixer with working bodies and a drive with a shaft, the mixer is made in the form of upper and lower working bodies, the lower working body located on the drive shaft with a wooden sliding bearing, and the upper working body made with holes and connected to the hydraulic cylinder drive, in addition, the upper and lower working bodies are interconnected by guides made in the form of vertical rods rigidly fixed to the bottom working body passing through upper working body opening and serving for the mixture and for movement of the upper body of the working height of the tank, as well as synchronize the rotational movements of the upper and lower working parts.

Figure 1 shows a General view of the device and the pairing of the upper and lower working bodies.

Figure 2 presents a view of the upper working body.

Figure 3 presents the control circuit of the reverse movements of the electric drive motor of the lower working body and changing the direction of movement of the rod of the hydraulic cylinder of the upper working body.

The device for mixing contains a reservoir 1, mounted on the base 2, a shaft 3 of the lower working body 4, passed through a wooden sliding bearing 5, which is installed in the housing 6, the upper working body 7 with holes for the guide rods 8, which are rigidly fixed to the lower working body 4, the hydraulic system of the hydraulic cylinder drive 9 of the on-off distributor 10, the thrust bearing 11 connected to the upper working body 7, the sensors 12 and 13 of the reverse system 14, the electric motor 15, the electromagnetic drive 16, the plunger Black pump 17, drain line 18. Sliding bearing 5 is self-sealing due to the absorption of moisture from the mixed mixture.

The device for mixing according to the present invention operates as follows (see figure 1).

The components to be mixed are mixed into the tank 1 through openings 19 in the upper working element 7 (see Fig. 2). The electric motor 15 is turned on.

The electric motor 15 simultaneously transmits torque to the gearbox and to the plunger pump 17 of the drive of the hydraulic cylinder 9 (see figure 3).

The movement of the upper working body 7 along the guides 8 is carried out using a hydraulic cylinder 9, which has the ability to change the direction of movement by switching the on-off valve 10 installed in the hydraulic system of the hydraulic cylinder drive 9. When the device is operating, the vertical guiding rods 8 act on the mixed mixture and on the upper working body 7, forcing it to rotate synchronously with the lower working body 4. In this case, the mixed mixture moves in the horizontal plane due to the rotation of the lower him working body 4 and simultaneously moves through holes in the vertical plane due to movement along the guides 8 of the upper working body 7 (see figure 2).

For the passage of the stirred mixture in the vertical direction in the upper working body 7 there are openings 19 (see figure 2). When the upper working body 7 is in contact with the lower working body 4, the sensor 12 of the reverse switching system 14 is activated (see Fig. 3), the rotation of the drive of the electric motor 15 of the lower working body 4 is reversed, and the two-position hydraulic distributor 10 of the hydraulic cylinder 9 of the upper working body drive is simultaneously switched 7, it starts to move up. Switching of the distributor is carried out by an electromagnetic actuator 16 upon receipt of signals from the sensors 12 and 13. When the upper working member 7 reaches the maximum possible height at the level of the tank 1, the reverse switch 13 is activated and the two-position hydraulic distributor 10 of the hydraulic cylinder 9 is simultaneously switched. The lower working member 4 changes the direction of rotation , and the upper working body 7 begins to move down.

When the upper working body 7 reaches the maximum possible depth at the level of the tank 1, the reverse switch 12 is activated and the two-position hydraulic distributor 10 of the hydraulic cylinder 9 is simultaneously switched. The lower working body 4 changes the direction of rotation, and the upper working body 7 starts to move up.

Upon reaching the required consistency of the mixture, the electric motor 15 is turned off, plugged with plugs 20 of the hole 19 in the upper working body 7 (see figure 2), the drain line 18 opens.

Due to the installation of plugs, the upper working body becomes a piston capable of displacing the mixture from the tank.

The electric motor is turned on, the finished mixture is displaced from the reservoir 1 by moving the upper working member 7. When the openings 19 are closed with plugs 20, the upper working part 7 acts as a piston for unloading the mixture through the drain line 18.

Thus, in the proposed mixing device provides a complex movement of the mixture (both rotational and reciprocating) and the process of obtaining a homogeneous mass occurs much more intensively than with conventional mixing, and takes less time and allows you to get a homogeneous mass of a large volume for minimum operating time . The device allows you to achieve an effective combination of two types of effects on the mixed mixture: jointly reverse rotation of the upper and lower working bodies in combination with the reciprocating movement of the lower working body. The speeds of the reciprocating and reverse rotational movements are selected depending on the composition of the mixed composition.

Claims (1)

A device for mixing, containing a reservoir, a mixer with a drive, a shaft and with two working bodies, characterized in that the mixer is made in the form of upper and lower working bodies, the lower working body located on the drive shaft with a wooden sliding bearing, and the upper working body made with holes and connected to the hydraulic cylinder drive, in addition, the upper and lower working bodies are interconnected by guides made in the form of vertical rods rigidly fixed to the lower working body and pass seeding through the holes of the upper working body.

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