JPS6314664B2 - - Google Patents

Description

[Detailed description of the invention] Industrial applications The present invention relates to an improvement in a grain sorting device for dissimilar grains.

PRIOR TECHNOLOGY While dissimilar grains are made to flow in the vertically inclined direction of a porous wall sorting board, the grains are jetted in the horizontally inclined direction by the wind force ejected from the diagonally upper small holes of the sorting board. The specific gravity grains settle close to the surface of the sorting plate, and the low specific gravity grains float up and flow in a downward direction on the grain layer of high specific gravity grains, and then in both the upward and downward directions on the side of the sorting plate. A grain sorting device is already known in which grains of different types are separated and flowed out in a vertically inclined direction.

Problems to be Solved by the Invention The conventional grain sorting device described above is used by providing only a blow hole that blows air in an obliquely upward direction on the grain sorting plate surface.
High-density grains (brown rice) that settle close to each other on the sorting board surface
When the grains are jetted diagonally upward through the blast holes, the grains come into direct or indirect contact with the sloped wall surface without the blast holes located in front of the grains, and their flight force is reduced by friction. Therefore, the advancing action of high-density grains (brown rice) and the flotation action of low-density grains (paddy) are both inactive, resulting in a reduction in the sorting action.

SUMMARY OF THE INVENTION An object of the present invention is to provide a grain sorting device that improves the drawbacks of the prior art and significantly increases sorting efficiency.

Means for Solving the Problems The present invention has a sorting board mounted with the grain supply side high and the grain removal side low and tilted in the vertical direction, and tilted in the horizontal direction perpendicular to the vertical direction. In the grain sorting device, the sorting plate has a chevron-shaped uneven surface in which concavities and convexities are alternately formed in the horizontal direction, and a plurality of obliquely upward small holes that blow air in a horizontal upward direction are formed on the chevron-shaped uneven surface; By opening a plurality of obliquely downward small holes which emit air in the horizontal downward direction, and making the total hole area of the obliquely downward small holes smaller than the total hole area of the diagonally upward small holes, Solved the problem.

Effect The large specific gravity grains that settle close to the sorting board surface due to the horizontally upward wind blowing from the diagonally upper small hole are blown up diagonally upward by the wind blowing from the diagonally upper small hole. At this time, due to the total pore area smaller than the total pore area of the diagonally upper small hole, it is deflected in the downward direction by the jet from the diagonally lower hole with a small wind force,
High-density grains are less likely to come into direct or indirect contact with the diagonally downward facing surface of the sorting plate, and the reduction in flight force is weakened.

On the other hand, by the wind blowing through the grain layer in the downward direction from the obliquely downward small holes, the small-density grains floating on the upper surface of the grain layer of high-density grains are smoothly blown down to the lower side of the sorting board. Then, grains with low specific gravity drift toward the lower side in the horizontal direction of the board surface, and grains with high specific gravity drift toward the higher side in the horizontal direction of the board surface, and a layer of mixed grains is formed in the middle, and each grain drifts toward the lower side in the vertical direction. The grains flow out in different directions and are taken out of the machine separately from the grain outlet.

Example The present invention will be explained with reference to embodiment figures.

A chevron-shaped uneven surface 2 in which unevenness is alternately formed in the horizontal direction is formed on the board surface of the sorting board 1 which is inclined both in the front and back (horizontal direction) and left and right (vertical direction), and each chevron-shaped uneven surface 2 on the sorting board surface is formed. A plurality of obliquely upper small holes 3 which emit air in a lateral upward direction and a plurality of obliquely downward small holes 4 which emit air in a horizontal and downward direction are respectively opened.

In addition, the lower side plate end of the plate 1 is opened to form a grain discharge port 5, and the plate ends in the other three directions are surrounded by side walls 6 to form a sorting frame 7. An air chamber 8 is provided in the lower part of the filter 1 and fixed to the sorting frame 7, and the air chamber 8 is connected to a blower 10 through an air passage 9.

The sorting frame 7 has a horizontal rod 1 whose one end is pivotally connected to the base 11.
2 by connecting rods 13, and the other end of the horizontal rod 12 is supported by an angle adjustment device 16 consisting of a support rod 14 and a screw shaft 15. The inclination angle of the sorting board 1 can be adjusted as desired by moving up and down.

There is an intermittent rotary valve in the air passage 9 (not shown).
In some cases, the sorting action is performed by installing the machine on a shaft and blowing intermittent air onto one side of the sorting board. 18 is a supply hopper provided on the higher side of the sorting board 1, 19 is a vibration mechanism for vibrating the sorting board 1, P is the discharge direction of sorted grains, H is the higher side of the sorting board, L is the lower part of the sorting board It's on the side.

In the sorting board 1, the area of each of the diagonally upper small holes 3 and the diagonally lower small holes 4 or the number of said small holes are made different, and the total hole area of the diagonally lower small holes 4 is changed to the total hole area of the diagonally upper small holes 3. It is made smaller than.

In the figure, the hole diameter of the obliquely upper small hole 3 is larger than the hole diameter of the obliquely downward small hole 4, and each small hole 3 or 4 has the same number.
are provided on both side slopes of the chevron-shaped uneven surface 2. The sorting plate 1' in Fig. 5 has each small hole 3 and 4.
Group pores B, which are collectively opened, are arranged on the entire surface at appropriate intervals, and depending on the type of grain selected, a single hole may not have enough air volume to blow the grains upward in the lateral direction. , a large number of small holes are formed into a group hole to generate a sufficient amount of blowing wind.

In the above-described configuration, when the mixed grains of paddy rice and brown rice are put into the supply hopper 18 and the blower 10 is started, the foreign grains flow down onto the sorting board 1 and flow to the lower side to reach an appropriate layer height. Forms a distributed grain layer. This grain layer is floated by the air flowing from the air chamber 8 at the bottom of the sorting board 1 through a large number of small blowholes provided on the surface of the board 1, and the grains are sorted by specific gravity.

The embodiment of the present invention has a plurality of obliquely upper small holes 3 that emit air in an upwardly inclined direction, and a plurality of obliquely upward small holes 3 that emit air in an inclining direction, on a chevron-shaped uneven surface 2 of a sorting board 1 that is mounted inclined both horizontally and vertically. Since the diagonally downward small holes 4 are respectively opened and the total hole area of the diagonally downward small holes 4 is smaller than the total hole area of the diagonally upper small holes 3, the diagonally upper small holes of the chevron-shaped uneven surface 2 are made smaller. A small amount of wind blows from the diagonally downward small hole 4 provided in the diagonally downward facing surface in front of the hole 3, and the large specific gravity grains (brown rice) are jetted in the downward direction, so that the grains float to the surface. As a result, the space between the grains is moderately spaced, and the loss of flight force caused by direct or indirect contact with the downwardly facing surface of the grain is weakened, so that the forward action of high-density grains (brown rice) is smooth. At the same time, the flotation effect of low-density grains (paddy) becomes active, and the specific-gravity sorting effect is reliably performed.

In addition, due to the wind blowing through the grain layer in the downward direction, the low-density grains that have floated to the top of the grain layer of high-density grains are smoothly blown down to the lower side of the sorting board, and the small-density rice is As the current flows towards the rear of the board,
The brown rice with a high specific gravity flows to the front of the board, and the mixed grains of paddy and brown rice in the middle flow and flow out separately in the discharge direction P, and are separately taken out of the machine from the grain discharge port 5. .

Furthermore, the efficiency of the embodiment of the present invention can be further improved by vibrating the sorting plate laterally. Further, by using continuous wind or intermittent wind as the wind blown out from below the sorting plate through small holes in the plate surface, it is possible to obtain an optimal grain sorting device according to the sorted grains.

Effects of the Invention The grain sorting device of the present invention has a sorting board that is tilted both vertically and horizontally, and has a plurality of obliquely upper small holes that blow air in a horizontal and upward direction, and a plurality of obliquely upward small holes that blow air in a horizontal and downward direction. By opening the diagonally downward small holes and making the total hole area of the diagonally downward small holes smaller than the total hole area of the diagonally upward small holes, the overall blowing force promotes the forward movement of large specific gravity grains and the small specific gravity grains. It activates the floating action of each grain to make the specific gravity sorting action accurate and smooth, and its structure is simple and easy to manufacture, greatly increasing the sorting efficiency and ensuring high quality selected grains. This has advantages such as mass production.

[Brief explanation of the drawing]

The drawings are illustrations of embodiments of the present invention. Figure 1 is a side view of this device, Figure 2 is a plan view of its sorting board, and Figure 3 is a side view of the device.
The figure is a partially enlarged sectional view of the sorting board, FIG. 4 is an explanatory view of its sorting action, and FIG. 5 is a cutaway plan view of the sorting board (another embodiment). 1, 1'...Sorting board, 2...Chevron-shaped uneven surface, 3...
... Oblique upper small hole, 4 ... Oblique lower hole, 5 ... Grain discharge port, 6 ... Side wall, 7 ... Sorting frame, 8 ... Air chamber,
9...Blower path, 10...Blower, 11...Base,
12... Horizontal rod, 13... Continuous rod, 14... Support rod, 1
5...Screw shaft, 16...Angle adjustment device, 17...
Operation handle, 18... Supply hopper, 19...
Vibrator frame, B...Global small hole surface, P...Direction of grain discharge, H...High side of the sorting board, L...Low side of the sorting board.

Claims (1)

[Scope of Claims] 1. A grain sorting device having a sorting board mounted with a grain supply side high and a grain removal side low and tilted in the vertical direction, and tilted in a horizontal direction perpendicular to the vertical direction, The sorting board has a chevron-shaped uneven surface in which concavities and convexities are alternately formed in the horizontal direction, and the chevron-shaped uneven surface has a plurality of obliquely upward small holes that emit air in a horizontal direction of inclination, and a plurality of obliquely upward small holes that blow air in a horizontal direction of inclination. 1. A grain sorting device characterized in that a plurality of obliquely downward small holes are respectively opened to emit air, and the total hole area of the obliquely downward small holes is made smaller than the total hole area of the diagonally upward small holes. 2. The grain sorting device according to claim 1, wherein the diameter of the obliquely upward small hole is larger than the diameter of the obliquely downward small hole. 3. The grain sorting device according to claim 1, wherein the number of the diagonally upward small holes is greater than the number of the diagonally downward small holes. 4. The grain sorting device according to claim 1, 2, or 3, wherein the grain sorting board is a vibrating sorting board that vibrates in the transverse direction. 5. The sorting board has a collective small hole surface in which each of the small holes are collectively opened, which is arranged at intervals over the entire surface of the sorting board. The grain sorting device according to item 4. 6. The grain sorting device according to claim 1, 2, 3, 4, or 5, wherein the wind blown out through each of the small holes is continuous wind. 7. The grain sorting device according to claim 1, 2, 3, 4, or 5, wherein the wind blown out through each of the small holes is intermittent wind.