JPS6015394B2 - 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.

Conventional stone-pulling grain sorting machines shake up the soil grains mixed in the grains while sorting them using the gravity selection of the sorting board, and discharge them from the discharge port as concentrated sand grains, but at this time, Once sorted, the ± sand grains are mixed into the grains again due to the shaking action, and the sand grains are mixed with the earth and sand grains, resulting in a reduction in the sorting accuracy.

Therefore, the present invention has been improved in view of the above-mentioned drawbacks, and a screen wall is formed on the shaking side of the sorting board, and a groove-shaped discharge gutter is provided protruding in front of the front discharge port provided at the center of the screen wall. , a large number of ventilation holes are arranged in the bottom wall of the discharge gutter, the outlet side of which is located behind the inlet side in the direction along the bottom wall surface, are closed, and the bottom wall can be adjusted in the vertical direction; Compared to the case where the air holes are opened perpendicular to the bottom wall surface, the air blowing out from the outlet gutter surface of the building is reliably directed backwards, horizontally or diagonally upward, and the rice grains on the discharge gutter are directed toward the sorting board. By giving buoyancy and reducing the friction with the soil particles, they can easily slide back to the sorting board, leaving only the soil grains, ensuring that only the soil grains are taken out, increasing the degree of concentration, and in other words, improving the sorting accuracy. It was developed to improve the

To explain the present invention with reference to examples, as illustrated in FIGS. 1, 2, and 3, the front bridge raising side screen wall 2 of the sorting board 1 is opened in an obtuse Q shape, and the screen wall 2 is Sekiguchi a large number of directional counterfeit holes 3 diagonally backward toward the center line c,
Further, a front discharge port 4 is provided in the center of the screen wall 2, and a front protrusion 5 that projects forward from the front discharge port 4 is connected to a side wall 6.
A groove-shaped discharge gutter 8 consisting of a bottom wall 7 and a bottom wall 7 is provided protrudingly, and a large number of air holes 9 are provided with the outlet side located behind the inlet side in the direction along the bottom wall surface of the bottom wall 7. 6, on the lower surface of the bottom wall 7, on the outside of the screen wall 2, and on the lower surface of the sorting board 1, there are air chambers 1 connected to passages through which air is blown from the blower 10, respectively.
1, 12, 13, and 14, and the sorting board 1 is arranged so that the bottom wall' of the discharge gutter 8 can be adjusted in the vertical direction.
It is attached to the edge of the frame with a hinge 15.

Further, a branch punch 16 is provided on the free-side side of the bottom wall 7, and is connected to an adjustment screw 17 provided on the gutter frame, so that the bevel angle of the frame can be adjusted. It is designed so that it can be done. Furthermore, the free end side of the bottom wall 7 of the groove-shaped discharge gutter 8, that is, the end portion 20 is bent as shown in FIGS. It has an arcuate folded portion 21 so as to simulate the shape of a circular arc.

Therefore, if the grains mixed with soil grains are supplied from the upper supply port 18 to the sorting board 1, and the wind blowing up from below to the upper front obliquely gives a specific gravity sorting effect, the soil grains with large specific gravity are It sinks to the bottom of the sorting wall, is swung diagonally forward, moves forward while being mixed with the perilla grains, and collects on the screen wall 2 on the forward sowing side.
The density of the soil grains becomes concentrated, and around the screen wall 2, the air hole 3
It is blown backward by the wind and terminates near the center line c, and at the same time, the upper layer of small-density persimmon grains joins the backward flow and flows from the rear discharge port 19 of the sorting board 1 to 8E. It will be grained.

On the other hand, the dirt particles that have gathered on the discharge port protrusion 5 of the screen wall 2 advance into the discharge gutter 8, and the dirt particles that are slightly mixed in by the wind at the counterfeit holes 9 of the bottom wall 7 are A rearward buoyant force is applied to cause the soil particles to slide back to the sorting plate, leaving the selected and more pure soil particles to be discharged and dropped from the distal end 20 of the discharge gutter 8. The groove-shaped discharge gutter 8 is formed to have an appropriate length, and has a large number of backward-facing blowholes on the bottom wall 7 of which the outlet side is located rearward than the inlet side in the direction along the bottom wall surface. Furthermore, since the bottom wall is appropriately sloped to blow horizontal or diagonal downward wind, it is possible to adapt to the mixing rate of soil particles mixed into the mulch grains, the flow rate of the mulch grains, etc. By adjusting the height of the discharge gutter end 20, that is, the slope of the bottom wall 7, it is possible to improve the accuracy of sorting the dirt particles, that is, the purity, and to reliably take out only the dirt particles. In addition, in order to adjust the height of the end portion 20 of the Hise gutter by changing the slope of the bottom wall 7 of the discharge gutter 8 mentioned above, it is sufficient to move the supporting frame 16 up and down using the spiral ridge 17. Since the folded part 21 of the part 20 slides on the wall surface of the arc-shaped wall 22 of the wind chamber 12 and does not form a gap, the air can be passed through the wind hole 9 without escaping. , and even if the slope of the bottom wall is changed, a constant amount of wind power can be obtained. In short, the present invention provides a groove-shaped discharge gutter having side walls and a bottom wall projecting in front of a front discharge port provided in the center of the front screen wall of the sorting board, and a bottom wall surface of the discharge gutter. The outlet side is located at the rear of the inlet side in the direction along the direction, and the bottom wall is configured to be adjustable in the vertical direction.
In the process of discharging the sand grains shaken up and concentrated by the gravity sorting of the sorting board from the front discharge port through the groove-shaped discharge gutter to the end of the channel, this is compared to a method in which a counterfeit hole is opened perpendicular to the bottom wall surface. By making sure that the rice grains floating on the discharge gutter surface are jetted backwards horizontally or diagonally downward, giving the rice grains on the discharge gutter a buoyant force in the direction toward the sorting plate and reducing friction with the soil grains, This can be easily slid back onto the sorting board,
It is possible to leave large specific gravity soil grains and gradually transport the sand grains by the rocking force, and reliably take out only the sand grains.Especially, the folded part at the end of the discharge gutter that slides into contact with the wall of the wind chamber By providing a
This has the practical effect of improving sorting accuracy and sorting efficiency.

[Brief explanation of drawings]

Drawings 1, 2, and 3 show embodiments of the present invention, in which Fig. 1 is a side sectional view of the whole, Fig. 2 is a plan view of the main part, and Fig. 3 is the main part. FIG. 1... Sorting board, 2... Screen wall, 3...
...Directional air vent, 4...Front outlet, 5...
...Front protrusion, 6...Both side walls, 7...
... Bottom wall, 8 ... Groove-shaped discharge gutter, 9 ... Adjacent air hole, 10 ... Air blower, 11, 12, 13, 14 ... Wind chamber,
15... Hinge, 16... Support frame, 17... Adjustment screw, 18... Providing groove mouth, 19... Rear discharge port, 20... - End part, 21... Turned part, 22... Wall. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1 A porous wall sorting board is tilted forward and backward, a screen wall is provided on the front swinging side of the sorting board, a blower is provided to ventilate through the perforated wall of the sorting board, and the sorting board is vibrated back and forth diagonally up and down. In a sorting device that discharges soil grains with a large specific gravity to a front discharge port on the front shaking side and discharges grains with a small specific gravity to a rear discharge port, a A groove-shaped discharge gutter consisting of both side walls and a bottom wall is protruded, and a large number of blowholes are provided on the bottom wall of the discharge gutter, with the outlet side being located further back than the inlet side in the direction along the bottom wall surface. The bottom wall is installed so that the tilt can be adjusted in the vertical direction,
A stone-pulled grain sorting machine characterized in that the bottom wall has a folded portion at the end thereof that slides into contact with the wall surface of the wind chamber.