JPH051350Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention selects only brown rice from mixed rice after hulling by rotating a plurality of disks each having a number of recesses on the surface. The present invention relates to a grain sorting device that selectively sorts grains.

[Conventional technology]

A rotating shaft is disposed horizontally inside the sorting cell, and a plurality of disks each having a plurality of recesses formed on the surface thereof are provided at appropriate intervals on the rotating shaft. A plurality of brown rice take-out chute are provided on one side of the disc so as to be inserted between the discs, and the sorting cell is further provided with a mixed rice supply section at one end in the axial direction. A disk rotary grain sorting device having a discharge section at the other end is disclosed in Japanese Patent Application Laid-Open No. 1983-1999 as a prior art.
This is proposed by Publication No. 136688.

The disk rotary grain sorting device is
When the mixed rice fed into the sorting cell from the supply section at one end repeats a flow in which it rises to a certain height due to the rotation of the disks and then falls down between the disks, this flow occurs. By utilizing the fact that the brown rice in the layer fits into the recess in the disk and falls from a high position, the brown rice falling from the high position is received by the brown rice take-out chute and taken out.

[Problem that the invention attempts to solve]

By the way, in this type of disk rotary grain sorting device, the probability that brown rice in the mixed rice will fit into the recess in each disk is proportional to the thickness of the fluidized bed of mixed rice in the sorting cell, while The thickness of the fluidized bed of mixed rice inside the tank tends to be thicker at a portion closer to the supply section and thinner at a portion closer to the discharge section.

On the other hand, in the conventional disk rotary grain sorting device, the distance between each disk is set to be the same for all disks.
Therefore, in the area closer to the discharge section, the amount of brown rice scooped up by the disk is small due to the thinner fluidized bed of mixed rice, and the overall sorting capacity is low and the sorting capacity is low. In order to improve
There was a problem in that the number of disks had to be increased, leading to an increase in size.

The present invention aims to solve this problem.

[Means for solving problems]

In order to achieve this objective, the present invention has a rotating shaft arranged horizontally inside the sorting cell, and a plurality of donut-shaped disks each having a large number of recesses formed on the surface of the rotating shaft at appropriate intervals. On one side of the sorting cell across the rotation axis,
A plurality of brown rice take-out chute are provided to be inserted between each of the disks, and the sorting cell further includes:
In a disk rotary grain sorting device that has a mixed rice supply section at one end in the axial direction and a discharge section at the other end in the axial direction, the interval between the disks is set closer to the discharge section. It is designed to be narrower on the sides.

[Functions and effects of the idea]

With this configuration, even if the thickness of the fluidized bed of the mixed rice in the sorting cell becomes thinner near the discharge section, the brown rice in the mixed rice will remain in the disk due to the large number of discs on the discharge section side. Since the chances of fitting into the recess can be increased, it is possible to prevent the tendency for the sorting ability to decrease in the region closer to the discharge section.

Therefore, according to the present invention, it is possible to improve the sorting ability and also to reduce the size.

〔Example〕

Below, we will explain the drawings of an embodiment in which the present invention is applied to a grain sorting mechanism in a hulling sorter.The disk rotary sorting device 1 removes hulled rice after being shelled in a hulling section (not shown). After being sorted into paddy grain and mixed rice by wind sorting, the mixed rice is sorted into brown rice and paddy by a plurality of disks 11 arranged horizontally in a sorting cell 2.

The sorting cell 2, as shown in FIG.
It is formed into a substantially cylindrical shape so as to be separated from the outer circumferential surface of the disk 11 by an appropriate gap h over the range of the central angle θ except for point a. (not shown) is provided so that it can be opened and closed freely.

Inside the sorting cell 2, a rotating shaft 10, which is rotated at an appropriate speed by a motor, is supported parallel to the cylindrical axis of the sorting cell 2 at left and right side plates 2a, 2b at both ends of the sorting cell 2. This rotary shaft 10 has a donut-shaped disk 11 having a plurality of recesses 12 engraved on one or both sides thereof with dimensions such that brown rice can fit into it, but paddy cannot fit therein, and the disc 11 has a donut-like shape engraved at appropriate intervals in the axial direction. (However, the drawing shows a case where recesses 12 are carved on both sides of the disk 11).

The sorting cell 2 is provided with a feeding section 4 near a point where one side plate 2a and the top plate are connected, and a hopper 6 connected to the feeding section 4 is provided with a mixed rice thrower from a wind sorting section. On the other hand, a discharge part 5 is bored in the other side plate 2b of the sorting cell, and a reflux chute 7 is connected thereto for refluxing the paddy discharged from the discharge part 5 into the paddy supply hopper in the hulling part. ing.

As shown in FIGS. 1 and 3, the supply section 4 is provided on one side with the axis of the rotating shaft 10 interposed therebetween,
A brown rice take-out chute 9 is provided on the opposite side of the feed section 4 so as to be connected to the sorting cell 2, and the brown rice take-out chute 9 is used in common with one side plate of the brown rice take-out chute 9. The gate valve body 13 is arranged in an inclined manner so as to extend inwardly.
It is arranged between each of the disks 11 and between the disk 11 and the side plates 2a, 2b of the sorting cell 2, and the middle part of each gate valve body 13 is connected to the fluidized bed A of mixed rice in the lower part of the sorting cell 2. Brown rice removal chute 9
It is configured to separate the

The distance between the disks 11 is set to be wide on the side closer to the supply section 4 and narrower on the side closer to the discharge section 5.

The multiple recesses 12 in each disk 11 have a semicircular shape in which the circumferential length of the disk 11 is larger than the radial width, and the radial width is as follows: The inner surface is set to be smaller than the length dimension of brown rice and larger than the width dimension of brown rice, and is located on the front side with respect to the disk rotation direction among both left and right inner surfaces in the longitudinal direction of each recess 12. is formed into an inclined surface at an appropriate angle (for example, about 15 degrees), and the length from the intersection of this inclined inner surface and the bottom surface to the other inner surface is approximately equal to the length of brown rice, and , recess 1
The depth of No. 2 is set to be approximately equal to the diameter of brown rice.

The rice that has been husked in the hulling section is then air sorted in the wind sorting section so that the rice husks are sucked into the suction dust fan. The mixed rice from which the rice husks have been removed by wind sorting is supplied from the supply section 4 located above the sorting cell 2 from the mixed rice thrower.

The mixed rice thus supplied into the sorting cell 2 is lifted up to a certain height between the rotating disk 11 and the fluidized bed A in the movement indicated by the dashed-dotted arrow in FIG. It is transported toward the discharge section 5 while flowing as if falling.

During this flow, the brown rice in the mixed rice fits into the recesses 12 of each disk 11 and is lifted up to a high position, and then falls from the recesses 12 and is sorted to enter the gate valve body 13.

In this case, if the brown rice fits into the recess 12 of each disk 11 and is lifted up to an appropriate height position, even if the brown rice comes off from the recess 12 at that height position, the brown rice will be removed by the upward rotation of the disk. Since the component force in the throwing direction, the centrifugal force in the direction of the outer circumference of the disk, and the vector sum are inclined with respect to the cylindrical inner circumferential surface 2c of the sorting cell 2 and become an upward force, the inner circumferential surface of the sorting cell The brown rice moves along the slit, and can fall over the upper end of the gate valve body 13 in the direction of the brown rice take-out chute 9.

In the above embodiment, each donut-shaped disk 11 is formed into a flat plate shape, but each donut-shaped disk 11 is formed into a conical shape, and a large number of recesses 22 are provided on the inner surface thereof. Of course, it is also possible to use a different form.

Furthermore, if each of the gate valve bodies 13 is formed integrally with one side of the brown rice take-out chute 9, the structure of the sorting cell can be extremely simplified.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a longitudinal sectional front view of the sorting device, FIG. 2 is a sectional view taken along the - line in FIG. 1, and FIG. 2... Sorting cell, 2a, 2b... Left and right side plates,
2c... Inner peripheral surface of the sorting cell, 4... Supply section, 5...
...Discharge section, 9...Brown rice removal chute, 10...
Rotating shaft, 11... Disc, 12... Recess, 13
...Gate valve body.

Claims (1)

[Scope of utility model registration request] A rotating shaft is arranged horizontally inside the sorting cell, and a plurality of donut-shaped disks each having a large number of recesses formed on the surface thereof are provided at appropriate intervals on the rotating shaft. A plurality of brown rice take-out chute are provided on one side of the shaft so as to be inserted between the disks, and the sorting cell is further provided with a mixed rice supply section at one end in the axial direction. A disk rotary grain sorting device comprising a discharge section at the other end in the direction, wherein the distance between the disks is narrowed on the side closer to the discharge section. .