JPS596711B2 - stone grain sorting machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to improvement of a stone grain sorting machine, and improves sorting efficiency and grain sorting machine.
iLL-1 day day ma゜b1-you'' n, vf7re゛
Conventionally, as shown in Fig. 4, the front screen wall 22 of the sorting frame on which the sorting plate is mounted is used to shake up the selected soil particles of the sorting plate 21 forward and guide them to concentrate at the central discharge port. The size of the machine is significantly reduced because it is divided into two by the central discharge port 23 and steeply sloped at an acute angle β from the discharge port toward both side walls 24, but in order to compensate for the reduced effective area A, the sorting board is extended back and forth. Not only does the overall size of the frame become unnecessarily large, but the concentrating action of the soil grains works slowly over a long distance, which confuses the particles once they have been sorted, which dulls the sensitivity of the main sorting action and reduces the sorting accuracy. Efficiency is also 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, a discharge port 4 is provided in the center of the screen wall 2, and a groove-shaped discharge gutter 8 consisting of both side walls 6 and a bottom wall T is protruded from the front protrusion 5, and both side walls 6 are provided. And on the inner surface of the bottom wall T there are blowholes 9 and 10 facing backward.
is open, and on the outer surfaces of both side walls 6, the bottom wall 7, and the lower surface of the sorting board 1, there are provided chambers 12, 13, 14, and 15 connected to the air passage from the blower 11, respectively.

When grains mixed with soil and sand particles are fed from the supply port 16 to the sorting board 1, a wind blowing up from below to the front obliquely upward causes a specific gravity sorting action, and the soil and sand grains with high specific gravity sink to the bottom of the sorting board. It is thrown diagonally forward and advances while being mixed with the grains and collects on the screen wall 2, concentrating the density of the soil and sand grains, but furthermore, the dust is ejected diagonally backward from the blow hole 3 of the screen wall 2. The grains are blown by the wind 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, join the flow of all the grains backward, and reach the discharge port IT of the sorting board 1. Thresh the grain from The earth and sand particles gathered at the discharge port protrusion 5 of the screen wall 2 advance into the discharge gutter 8 and are slightly mixed in by the blowing air from the blowholes 9 and 10 on both side walls 6 and the bottom wall 7. The grains are blown back and carefully selected to leave even more highly purified soil grains, which are then discharged and dropped from the end 18 of the discharge gutter 8. The height of the discharge gutter end 18, that is, the slope of the bottom wall 7, can be adjusted to improve the accuracy of sorting the soil particles, that is, the purity.
Incidentally, in order to change the slope of the bottom wall 7 of the discharge gutter 8 and adjust the height of the distal end 18 of the discharge gutter, the supporting frame 19 is moved up and down by the screw 20.

As described above, the present invention provides a directional blowhole including a blowback effect on the side wall on the swinging side, and also has an inclined side wall for guiding the concentration of soil particles, that is, a screen wall, which is inclined at an obtuse angle with the discharge port as the starting point. This has the effect of increasing the sensitivity and selection accuracy of the sorting work, increasing the effective area ratio to the total area of the sorting board, reducing the size and weight of the vibrating body, and significantly improving the sorting efficiency.

[Brief explanation of drawings]

Figures 1, 2, and 3 show examples of the present invention, with Figure 1 being a side sectional view of the whole, Figure 2 being a plan view of the main part, and Figure 3 being an enlarged sloped view 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...
...Blowhole, 4...Exhaust port, 5...
・Protrusion, 6...both side walls, 7...bottom wall, 8...discharge gutter, 9, 10...blow hole, 11... ...Blower, 12, 13, 14, 15.
...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...Central discharge port, 24...・Both side walls, β...acute angle, A...effective area.

Claims (1)

[Claims] 1 A perforated wall sorting board is tilted forward and backward, 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, and the sorting frame is is vibrated back and forth diagonally up and down to discharge soil grains with high specific gravity from a groove-shaped discharge gutter consisting of both side walls and a bottom wall provided at the central protrusion of the screen wall, and discharge grains with low specific gravity to the rear discharge port. In the sorting device, the side wall on the front swinging side has its central portion protruding forward to form a screen wall gently inclined at an obtuse angle, and the screen wall has a direction diagonally backward diagonally toward the center line. A stone-pulled grain sorting machine characterized by having a large number of blowholes and forming a wind chamber connected to the air passage of the blower on the outside of the screen wall.