SU1127558A1 - Method of separating pests from grain - Google Patents

Abstract

A METHOD FOR INCREASING PESTS FROM GRAIN, including sifting ticks and insects on oscillating sieves, characterized in that, in order to increase efficiency of sowing, sowing of ticks is carried out before sifting the assault plates, which are carried out on sieves with reflective plates, and the latter are parallel to the direction of grain movement over the sieve, the distance between the plates is set at 1.31, 7 constituting the amplitude of the sieve oscillations in the direction perpendicular to the plates, and the depth of the grain layer on the sieve is Maintain an equal height of the plates .. (P / /

Description

The invention relates to the separation of bulk materials and can be used in laboratory and industrial conditions in determining the contamination and disinfection of grain and grain products.

A known method of cleaning grain, including the allocation of pests [1J.

There is also a known method for isolating pests and insects, including screening ticks and insects on / oscillating sieves _; .

However, the effective 'implementation of the well-known epistles is impossible, since mutually exclusive conditions are necessary for sowing ticks and insects. To overcome the resistance to sifting insects having a chitinous cover, intensive vibration modes are required, which lead to the death of ticks, which are characterized by extremely weak protection from mechanical influences [the infection is established only by detected live specimens of pests). As a result of this, recommendations on the process conditions are contradictory (for example, the acceleration of vibrations of sieves in known structures varies between 5.4-42.9 m / s ² ). However, reliable sowing of insects is not achieved even when using the upper limit of acceleration, leading to the death of 85% of ticks.

The purpose of the invention is to improve the efficiency of pest isolation.

This goal is achieved by the fact that according to the method of isolating pests from grain, the sieving of ticks is carried out before the sieving of insects, which are carried out on sieves ς with reflection plates, the latter being parallel to the direction of grain movement along the sieve, the distance between the plates is set within 1.3 - 1.7 component of the oscillation amplitude of the sieve in the direction perpendicular to the plates, and the thickness of the grain layer on the sieve is maintained equal to the height of the plates. Additional dynamic shock effects exerted by the reflection plates on the insects (directly or through the processed product) contribute to their transition to a “short-term state of numbness, during which the insects lose their strong contact with the grains, fall through a loosened product onto a sieve and are sifted through its openings .

In Fig.1 shows a device for implementing the proposed method) in Fig.2 is a section aa in Fig.1.

The device comprises a loading hopper 1, a feeder 2, a drive, for example an eccentric oscillator 3, and a sieve housing, including sieves 4 and 5, pallets 6 and 7, on the working one. The surface of the sieve 5 has reflective plates 8.

The method is as follows.

Infected grain through the feed hopper 1, the feeder 2 enters the sieve housing, which performs a circular translational motion in the horizontal plane.

Sifting of ticks is carried out on sieve 4 before sifting insects.

Sifting of insects is carried out on sieves 5 with reflection plates 8. After processing the initial sample in the product on the pallet 6 visually determine the presence of ticks, and on the pallet 7 - insects.

The proposed method allows to increase the efficiency of sifting of pests while reducing the degree of injury and processing of the sample to be analyzed in one go.

Aa

Figure 2

ВНИИПИ Заказ 8773/2 .. Circulation 721 Subscription

Branch of PPP Patent,

Uzhhorod, Project 4,

Claims (1)

METHOD FOR IMPROVING PESTS FROM GRAIN, including screening of ticks and insects on oscillating screens, characterized in that, in order to increase the efficiency of isolation, screening of ticks is carried out before screening of insects, which are carried on sieves with reflective plates, the latter being parallel to the direction of movement grain according to the sieve, the distance between the plates is set within 1.3- 1.7 component of the oscillation amplitude of the sieve in the direction perpendicular to the plates, and the thickness of the grain layer on the sieve is maintained equal to 5S the height of the plates. I .. "and | \ / C J 5 8 7 FIG. 1