RU81660U1 - FADEEV'S SOLUTION - Google Patents

Abstract

Object: Sieve. Scope: the device relates to the field of devices for dividing loose particles into fractions, mainly plant seeds, and can be used in confectionery, grain processing, as well as in agriculture. The bottom line: the grates are made of many parallel rods of circular cross section and are welded at the ends to the frame and to the transverse jumpers in the zone of their mutual intersection, the transverse jumpers at the ends are welded to the frame. Technical result: the quality of cleaning the sieve is improved, the efficiency of dividing seeds into fractions is increased. Fig. 3.

Description

The device relates to the field of devices for dividing bulk particles into fractions, mainly plant seeds, and can be used in a confectionery, grain processing, as well as in agriculture.

A device is known that contains a frame with grid-irons, longitudinal gaps between the grid-irons, grid-irons are interconnected by transverse jumpers [see description of the patent of Ukraine for utility model No. 51792 C2, publ. Ukraine, Byul. "Industrial Property" No. 12, 2002r. div Figure 4, 5, 6].

Known sieves have massive longitudinal and transverse ribs, which unnecessarily increases the mass of the sieve and the energy costs for their oscillation and cleaning.

Excess sieve mass reduces the durability of calibrators that use such sieves through increased wear on the hinge joints of the sieve with their oscillation mechanisms.

It makes it difficult to clean slit sieves from particles stuck in them due to the inertia of massive ribs.

The aim of the improvement is to improve the quality of cleaning sieves, increasing the efficiency of the division of particles into fractions.

This goal is achieved in that the Fadeev sieve containing a frame with grates, longitudinal slots between the grates, the grates are interconnected by transverse bridges, according to the improvement, characterized by the fact that the grates are made of many parallel rods of circular cross section and are welded at the ends to the frame and to cross jumpers in their area

mutual intersection, transverse jumpers at the ends are welded to the frame.

Technical result: the quality of cleaning the sieve is improved, the efficiency of dividing seeds into fractions is increased.

The technical result is achieved by the fact that the grid-irons from rods of a small round cross-section are well flowed around by loose particles of seeds and, when the diameter of the rods is from 2 mm to 4 mm, they are well self-cleaning from vibration of the sieve. The rods are able to bend elastically, for example, from the impact of elastic balls from below on the rods, creating waves that run along the surface of the sieve, which improves the sliding of seed particles along the rods, reduces clogging of the sieve with loose particles of seeds.

The gaps between the rods smoothly expand along the arc of the circumference of the cross section of the rods, which helps to clean the longitudinal gaps of the sieve from seed particles stuck in them.

When pressing particles from the bottom of the slits, stuck loose particles of seeds from a narrow section of the slots between the rods are more easily pushed into a wider one, where intensive particle rotation occurs, which increases the rate of division of loose particles into fractions and allows a significant reduction in the length of the sieve along the slots, which improves the technical economic indicators of the devices for which the sieves are intended.

Figure 1. Sieve Fadeeva. View from above.

Figure 1. Sieve Fadeeva. Top view on a sieve fragment.

Figure 2. Sieve Fadeeva. Cross section of a sieve fragment.

Designations in the drawings:

The Fadeev sieve contains a welded rectangular frame 1 with transverse bridges 2 welded to it from a strip or a round bar. Above, a lot of parallel rods 3 of circular cross section are welded to the part of the frame 1 and the transverse jumpers 2. The diameter of the rods 3 is from 2 to 4 mm. The overall dimensions of the frame 1 are 490 mm by 990 mm. Distance between transverse

jumpers 2 from 100 mm to 150 mm. The width of the gap between the rods 3 is from 1 mm to 15 mm.

The device works this way.

Fadeev's sieve is designed to work in the calibrator. The sieve is brought into an oscillatory state and loose particles, for example sunflower seeds, are fed to the rods 3. The width of the longitudinal slots is selected so that loose particles of the required caliber are sifted through the longitudinal slots of the sieve, the other part of the loose particles with an inappropriate caliber moves along the rods to exit from the sieve.

Round rods 3 are able to bend elastically under external pressure, for example, under the impact of elastic balls from below on rods (not shown in the drawings), creating waves that run along the surface of the sieve, which improves the sliding of loose seed particles on the surface of the rods 3 and helps reduce clogging longitudinal slots. Loose particles of seeds sometimes get stuck in the middle part between the rods 3, but it is enough to push the stuck particles into a smoothly expanding part between the rods, where the particles will be carried out by the circulation flow to the top of the sieve and go to it. Between the rods, there is an intensive rotation of loose seeds of particles, which increases the speed of division of loose particles of seeds into fractions and significantly reduces the sieve length, which improves the technical and economic performance of the devices for which the sieve is intended.

Claims (1)

A sieve containing a frame with grid-irons, longitudinal gaps between the grid-irons, grid-irons are connected by transverse jumpers, characterized in that the grid-irons are made of many parallel rods of circular cross section and are welded at the ends to the frame and to the transverse jumpers in the area of their mutual intersection, transverse jumpers at the ends are welded to the frame.