SU1502352A1 - Electric magnetic mixer - Google Patents

Abstract

The invention relates to devices for the preparation of activated building mixtures and allows for increased operational reliability. The electromagnetic mixer contains a chamber with a loading pipe 11, a discharge pipe, magnetic elements 5, a grid 10, electric windings 7, a source for creating a magnetic field. The camera is made in the form of two tubular knees. The source of the creation of a magnetic field can be made pulsed, while the windings 7 on each knee are connected to it in series, and the windings 7 between the knees are parallel. The loading nozzle 11 may be provided with an additional winding 12 and a constant magnetic field source connected to the latter. 2 hp ff, 1 ill.

Description

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Ie acquisition relates to the building materials industry, namely to devices for the preparation of activated building solutions.

The purpose of the invention is the reliability of work.

The drawing shows a mixer, the last cut.10

The mixer contains a mixing chamber mounted on a frame 1 with an inlet 2 and an outlet 3 orifices and a gate 4, magnetic elements 5, freely placed in the cavity of the chamber, which 15 is made in the form of two tubular elbows 6 connected by the ends, electromagnetic windings 7, surrounding the chamber the surfaces are connected. In order to increase the mixing efficiency, the dimensions of the magnetic elements 5 are chosen from the optimal limit 0, where D is the internal diameter of the closed pipe d is the average size of the mixed particles. This limit is determined by the possibility of effective interaction between the magnetic elements 5, i.e. with decreasing diameter (size) of magnetic elements 5, this efficiency increases, but the mass (weight) of the magnetic element and, consequently, their inertia decreases, which degrades the effectiveness of the effect due to the gravitational forces of the magnetic particles on the particles of the mixed media.

With decreasing magnetic diameter

through the control unit to the source 20 elements 5 compared with the diameter

In order to increase the mixing efficiency, the sizes of the magnetic elements 5 are chosen from the optimal limit 0, where D is the internal diameter of the closed pipe d is the average size of the mixed particles. This limit is determined by the possibility of effective interaction between the magnetic elements 5, i.e. with decreasing diameter (size) of magnetic elements 5, this efficiency increases, but the mass (weight) of the magnetic element and, consequently, their inertia decreases, which degrades the effectiveness of the effect due to the gravitational forces of the magnetic particles on the particles of the mixed media.

With decreasing magnetic diameter

on

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pulsed voltage, and in the outlet 3 is placed the lattice

8 with holes smaller than the magnetic body - the elements 5; and the inlet 2 is installed behind the loading port, which may be covered by the auxiliary electromagnetic winding 10. A discharge pipe is located above the outlet.

Magnetic elements as a result of collisions between themselves have the opportunity to pop out of the cavity of the chamber through the inlet 2. To avoid this, it is necessary to select a neck height of at least two of its internal diameters or be installed around the loading nozzle

9 an auxiliary electromagnetic winding 10 to which a pulse voltage is applied through the control unit, the magnetic flux of which is directed downwards, or a constant voltage whose electromagnetic field pushes the magnetic elements into the chamber cavity.

The control unit can be made in the form of a switch of a type of work, for example, to auxiliary winding 10 to apply a constant voltage, mine the source of a pulse voltage, which is most easily performed as a thyristor, the control input of which is connected to a pulse generator (multivibrator) with adjustable frequency of 3-10 Hz. It is possible to apply a 220 V (50 Hz) alternating voltage to the thyristor, which will ensure the switching of the thyristor.

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the piping of the chamber increases the mobility of the elements 5 and simplifies the possibility of obtaining a uniform fluidized bed, i.e. uniform mixing throughout the working volume.

With the same purpose (to obtain a fluidized bed uniformity), it is necessary to fill the cavity of a closed pipe by volume with magnetic elements 5 within 30–58%. The remaining part, depending on the volume of the magnetic particles, is filled with a solution, therefore the dose of cement and water introduced into the cavity of the chamber depends on the volume of the latter filled with magnetic elements 5.

The mixer works as follows.

The gate 4 is closed and the calculated volume of water is poured into the inlet 2, a pulse voltage is applied to the electromagnetic windings 7. As a result of the pulse current flowing through the last, an impulse electromagnetic field is created that ensures the chaotic movement of magnetic elements 5 in the chamber cavity with itself and with the walls of the chamber determines the creation of the fluidized bed of the elements 5. In this layer, through the inlet 2, fall asleep a quantity of cement to the amount of activated cement mortar. Magnetic elements 5, moving with acceleration, distribute vortices, which improves the mixing of water and cement.

To ensure unidirectional movement of elements 5, for example, with one impulse upward on the left and right nozzles of the knees, windings 7 on the left nozzles of the knees are connected in the same way as the windings 7 on the right nozzles, and windings between the left and right Bbw nozzles are opposed. In a single impulse, this causes the direction of the vector of the electromagnetic flow, for example, upwards on the left and right nozzles, i.e. The magnetic elements 5 in this impulse move upward, collide under the inlet, providing intensive mixing of the cement with water.

Claims (3)

1. Electromagnetic mixer, containing a mixing chamber of a magnetic mat installed vertically with 20 loading and unloading nozzles A rial with magnetic bodies located in it, a grid, electrical windings on the lateral surface of the chamber, a source for creating a magnetic field, characterized in that, in order to ensure reliable operation, the mixing chamber is made in the form of two tubular bends connected by the ends. 2. A mixer as claimed in claim 1, characterized in that the source of creating the magnetic field is pulsed, with the windings on each knee connected in series with it, and the windings between the knees in parallel. 3. A mixer according to claim 1, characterized in that the loading nozzle is provided with an additional winding and a constant magnetic field source connected to the latter.