SU1611464A1 - Sieve - Google Patents

Abstract

This invention relates to a technique for separating granular bulk materials by size, for example, in agriculture. The purpose of the invention is to increase the efficiency of the separation of seeds by their thickness. A sieve surface (PP) 1 with longitudinal and transverse bridges 3 and rectangular holes 2 arranged in parallel rows along the sieve is mounted on the sieve frame. A frame 9 with strings 10 is mounted over the PP 1 in a vertical plane. The strings 10 are located above the jumpers 3 with a pitch equal to the pitch of the rows of holes 2. The material moves along the PP 1 under the action of oscillations of the machine sieve mill. The strings 10 orient the seeds along the holes 2, and the seed mixtures are divided according to the difference in seed thickness into two fractions. Seeds whose thickness is less than or equal to the width of the holes 2 are sifted through them. The wider seeds rest on one side against the edges of the openings 2, and on the other side of the strings 10 and move sieve in the tail fraction. 3 il.

Description

FIG. one

The invention relates to a technique for the separation of granular bulk materials on dimensions and can be used in the Rural economy.

The aim of the invention is to increase the efficiency of the separation of seeds according to their

olshchina.

Figure 1 presents the structural diagram of the sieve, top view; figure 2 is the same, side view; on fig.Z - section aa in figure 2.

The sieve consists of a sheet screening surface 1, on which rectangular Holes -2 are made with parallel straight rows with 2 longitudinal and transverse bridges 3 and frames 4. At the corners of frame 4, an additional frame 9 is installed using adjustment screws 5,6 and gaskets 7,8 with the strings 10. The height of the pads 7 is chosen to be somewhat smaller than the smallest thickness of the seeds being processed. Gaskets 7 are installed between frame 4 and additional frame 9 on the supply side of the source material to the screening surface 1. This eliminates jamming of the input particles between the screening surface 1 and the strings 10. The height of the gasket 8 installed on the side of the separated material from the screening surface 1, is chosen to be equal to or somewhat less than the width of the seeds of the material being processed. The heights of the pads 7 and 8 are selected for each seed mixture and they determine the installation of an additional frame 9 with a slope to the screening surface 1 (with a rise in the direction of movement of the material along the screening surface 1). The strings 10 are fixed on an additional frame 9 above the longitudinal jumpers 3 with a pitch, equal, step of a series of holes of the sifting surface 1, In addition, the additional frame 9 is fixed by means of adjusting screws 6 on the frame 4 in such a way that the strings 10 are located above middle of the longitudinal bridges 3 of the screening surface 1. To ensure complete descent from the screening surface of the seed fraction (large seeds), an additional frame 9 with strings 10 is 30-40 mm longer than the frame 4 of the screening surface 1.

Preparing the sieve for work consists in selecting the height of the pads 7 and 8 (the choice of them is determined on the basis of examining the width of the seeds of the material being processed) and securing the additional frame 9 on the frame 4. When assembled, the sieve is installed in a lattice mill of standard cleaning machines Original the material from the loading device of the grain cleaning machine arrives at the beginning of the screening surface 1 and under the influence of vibrations of the machine’s sieve mill moves 0 along the screening surface 1, and the strings 10 guide Comfort seeds along holes 2 (seeds move, as it were, along a stream formed below by a series of oblong holes 2 and strings 10 on both sides), and 5 the seed mixtures are divided into two fractions according to the difference in seed thickness: which is less than or equal to the width of the holes n of the sieve, and similar - particles of size 0 more than the sizes of the holes. At the same time, the seeds of the passage fraction, in which half the width b is smaller than the width of the hole n, are immediately sifted through the holes 2. The wider seeds with one side lean against the edges of the holes 2, and the second about the strings 10 and move in this position along the sieve. Since the TO strings are set obliquely to the sifting surface 1, then one side of the seeds rises and moves along them. when the half width of the seed pre-reclamation on the plane of the screening surface 1 becomes less than half the width n of the holes 2, they are sifted through the holes 35 into the pass-through fraction. The seeds of the gathering fraction move along the screening surface and, since the additional frame 9 with the strings 10 is 30-40 mm longer than the frame 4, they completely converge 40 into the gathering fraction.

The form of the invention of the Sieve, comprising a frame and a screening surface mounted thereon, with longitudinal and transverse bridges 45 and rectangular openings arranged in parallel rows along the sieve, characterized in that. In order to increase the efficiency of the separation process of seeds by their thickness, the sieve 50 is provided with a frame with strings mounted for movement over the screening surface in a vertical plane, while the strings are located above the longitudinal bridges with a pitch 55 equal to the pitch of the rows of holes.

FIG. 2

VuB. 3

Yu Yu

Claims (1)

Claim Sieve, including a frame and a screening surface mounted on it with longitudinal and transverse jumpers and rectangular holes located in parallel rows along the sieve, characterized in that. in order to increase the efficiency of the process of separating seeds by their thickness, the sieve is equipped with a frame with strings installed with the ability to move above the screening surface in a vertical plane, while the strings are located above the longitudinal jumpers with a step equal to the pitch of the rows of holes.