JPS5831990B2 - stone grain sorting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement of a stone grain sorting machine, and was developed for the purpose of improving sorting efficiency and sorting accuracy. Conventionally, as shown in FIG. The front screen wall 22 of the sorting frame equipped with a sorting board is divided into two by the central discharge port 23 in order to shake up the grains forward and concentrate them inductively at the central discharge port, and from the discharge port toward both side walls 24. Although it is significantly reduced due to the steep slope at the acute angle β, the reduced effective area A
In order to compensate for this, the sorting board is extended back and forth, which not only makes the entire machine frame unnecessarily large, but also the concentrating action of the soil grains works slowly over a long distance, causing confusion in the particles once they have been sorted. As a result, the sensitivity of the main sorting effect becomes dull, and both the sorting accuracy and efficiency are low.

As illustrated in FIG. 1, FIG. 2, and FIG. 3, the screen wall 2 of the sorting board 1 is gently inclined at an obtuse angle α, and the screen wall 2 is tilted centripetally toward the center line C. A large number of directional blowholes 3 are opened at the rear, and a discharge port 4 is provided in the center of the screen wall 2. A groove-shaped discharge gutter 8 consisting of both side walls 6 and a bottom wall 7 is protruded from the front protrusion 5. A rear-facing blowhole 9 is opened on the inner surface of the housing 6, and air chambers 12, 13, 14. 15.

When grains mixed with soil and sand particles are supplied from the supply port 16 to the sorting board 1, a wind blowing up from below to the front slope causes a gravity sorting action, and the grains with high specific gravity sink to the bottom of the sorting board and are sorted on the slope. The grains are shaken forward and mixed with the grains as they move forward and collect on the screen wall 2, concentrating the density of the soil particles, but they are further concentrated on the screen wall 2.
are blown by the centripetal, obliquely rearward jet from the blowhole 3 and converge near the center line C, and at the same time, the grains with low specific gravity in the upper layer tend to be blown back backwards, and the whole grain is rearward. The grains are discharged from the discharge port 17 of the sorting board 1.

Sediment particles collected on the discharge port protrusion 5 of the screen wall 2 are discharged to the discharge gutter 8.
The grains that are slightly mixed in are blown backwards by the blast from the blowholes 9 on both side walls 6, and are carefully selected to leave more highly purified soil grains. The height of the discharging gutter end 18, that is, the slope of the bottom wall 7, is adjusted according to the rate of dirt particles mixed in with the grains, the flow rate of the grains, etc. It is possible to improve the selection accuracy, that is, the purity.

In addition, by changing the slope of the bottom wall 7 of the discharge gutter 8, the discharge gutter...
. . ., the support rod 19 is moved up and down by the screw 20.

As described above, the present invention provides a directional blowhole that includes a blowback effect on the side wall of the shaking side, which blows back grains lighter than the earth and sand grains diagonally backward, thereby promoting the concentration effect of the earth and sand grains, thereby further sorting the grains. This has the effect of increasing the sensitivity and precision of the action, increasing the effective area ratio to the total area of the sorting plate, reducing the size and weight of the vibrating body, and significantly improving the sorting efficiency.

[Brief explanation of drawings]

Drawings 1, 2, and 3 show examples of the present invention, in which Fig. 1 is an overall side sectional view, Fig. 2 is a plan view of the main part, and Fig. 3 is an enlarged slope of the main part. FIG. 4 is a plan view of the main part of the conventional embodiment. 1. Sorting board, 2. Screen wall, 3. Blower hole, 4. Outlet, 5. Projection, 6. Both side walls, 7. Bottom wall, 8.
・Discharge gutter, 9..Blow hole, 10..Blow hole, 11..Blower, 12..Wind chamber, 13..Wind chamber, 14..Wind chamber, 1
5. Wind chamber, 16. Supply port, 17. Discharge port, 18.
・Discharge gutter end, 19... Support frame, 20... Screw, α...
Obtuse angle, C...center line, 21...sorting board, 22...screen wall, 23...center outlet, 24...both side walls, β...acute angle, A...effective area.

Claims (1)

[Claims] 1. A perforated wall sorting board is tilted back and forth in a curved manner, a screen wall on the front swinging side and walls on both sides of the sorting board are provided to form a sorting frame, and a blower is provided to ventilate through the perforated wall of the sorting board, In a sorting device that vibrates a frame back and forth obliquely up and down to discharge earth and sand grains of high specific gravity to the forward shaking side and discharges grains of low specific gravity to the rear discharge port, the side wall on the front shaking side is used as a screen wall, The screen wall has a large number of directional blowholes opening diagonally backward toward the center line, and in front of the outlet provided at the central protrusion of the screen wall, there are side walls and a bottom wall. 1. A stone-pulled grain sorting machine, characterized in that a groove-like discharge gutter is provided protrudingly provided, and a wind chamber is formed in the screen wall to be connected to the air passage of the blower.