SU1166841A1 - Apparatus for seiving pulverulent materials - Google Patents

Abstract

1. A DEVICE FOR DRILLING POWDERED MATERIALS, including a housing, a fixed screen drum, inside of which is placed a rotor with work beams, loading and unloading funnels, magnetic catchers, auger feeder, and a spreading device of material used in order to improve the flow rate, in order to improve the flow rate, in order to improve performance. by equalizing the load on the screen drum, the material spreader is made in the form of a truncated cone with blades fixed to the inner surface of the cone, the plane The blades are angled to each other and to the longitudinal axis of the rotor, with the pivot of turning the planes of at least three adjacent blades relative to each other along the axis of the rotor equal to 12-15 °, and the angular distance between adjacent blades is 10-15 & deg. 2. The device according to claim 1, characterized in that, in order to increase the degree of cleaning of the screening surface, it is provided with brushes that are fixed to the workers on the blade x of the rotor. 3. A device according to claim 1, characterized in that the magnetic catchers are placed in the hopper.

Description

ABOUT)

about

00 4ib

The invention relates to a technique for classifying materials by size, in particular to devices for sifting powdered materials to be used, for example, in the food industry.

The purpose of the invention is to increase the productivity of the device by equalizing the load on the screen drum and the degree of cleaning of the screening surface.

FIG. 1 shows the device, a general view; in fig. 2 - screw feeder with spreader; in fig. 3 is a section A-A in FIG. 2; in fig. 4 shows a section BB in FIG. 2; in fig. 5 shows a section B-B in FIG. four; in fig. 6 is a cross-section of the FIG. four; in fig. 7 - section DD in FIG. four; in fig. 8 is a section of the EE of FIG. four; in fig. 9 - rotor blade with brushes; in fig. 10 - blade, plan view; in fig. 11 - section MF in FIG. 9; in fig. 12 is a section AND-AND in FIG. five.

A device for sifting powdered materials contains a horizontally mounted cylindrical screen drum 1 placed in housing 2, a rotor 3 consisting of a shaft 4 and a wheel 5 on which the ends of working blades 6 are fixed, a collection 7 of waste, an opening 8 for waste to exit is made in the end face wall 9, a flow divider 10, a magnetic catcher 11, a rotary feeder 12, a nipple 13, an electric motor 14, a housing flap 15, a frame 16 for mounting all the assemblies, a feed funnel 17, a screw feeder 18, a lock gate 19, a chain 20 a lock gate actuator, a magnetic catcher in the form of permanent magnets 21, brackets 22 fixed to the holder 23, guides 24 magnets 21, a spreader in the form of a truncated cone 25, to which is fixed by another end of the blade 6 consisting of guides 26, blades 27, brushes 28 with clamping strips 29.

The planes of the blades 27 along the axis of the rotor 3 are rotated relative to each other by 12-15 °, but the maximum angle between

parallel to the axis of the rotor 3 segment and the plane of the blade 27 (Fig. 6-8) should not exceed 45 °. The pitch is selected from the condition that the mixture is uniformly distributed along the axis of the rotor. Angular separation between

The blades 27 10–15 ° are selected from the condition of excluding both the displacement of the feed flows of the mixture with each other, and significant gaps between the flows.

A device for screening powder materials works as follows.

The material, in particular the flour to be screened, after opening the sluice gate 19, is fed to the feed hopper 17 with permanent magnets 21,

thanks to which it is cleaned of ferromagnetic impurities. Then the flour enters the screw feeder 18, which feeds it to the spreader in the form of a truncated cone 25, where the flour particles on the blade 27 are under the action of the axial and

centrifugal force. The resultant of these forces throws flour onto the sieve drum I at different distances, where it is picked up by the blades 6 of the rotor 3. The blades 6 of the rotor 3, located along the helical line, move the material along the surface of the sieve drum 1 from its loading end to the end wall 9. dropping through the screen drum 1, the material gets onto the flow divider 10, is divided into two streams and passes through magnetic catchers 11, which cleanse it of ferromagnetic impurities.

The sifted material enters the rotary feeder 12 and is directed to production. Unprocessing waste is moved by blades 6 to the rear end wall

9, where through the opening 8 they are pushed into the nozzle 13, through which they are sent to a waste collector 7.

Due to the fact that permanent magnet 21 are located in the hopper 17, the flour is cleaned of ferromagnetic impurities before it gets on the sieve, thereby protecting the sieve from damage during the sieving process.

6-6

in-in

25

27

R

+ +

+

/

.one

FIG. 9

fi2. 70

Claims (3)

1. A DEVICE FOR SOWING POWDER MATERIALS, including a housing, a fixed sieve drum, inside which a rotor with working blades, a loading and unloading funnel, magnetic catchers, a screw feeder and a material spreader are located, characterized in that, in order to increase the productivity of the device due to load balancing on the sieve drum, the material spreader is made in the form of a truncated cone with blades that are fixed on the inner surface of the cone, and the plane of the blades located at an angle to each other and to the longitudinal axis of the rotor, while the step of rotation of the planes of at least three adjacent blades relative to each other along the axis of the rotor is 12-15 °, and the angular distance between adjacent blades is 10-15 °. 2. The device according to π. 1, characterized in that, in order to increase the degree of cleaning of the screening surface, it is equipped with brushes that are mounted on the working S rotor blades. 3. The device according to π. 1, characterized in that the magnetic traps are placed in the loading funnel.