JPS6143112B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a sorting device for sorting brown rice from scraped rice after hulling.

[Conventional technology]

A rotary sorting tube having a number of concave portions formed on its inner circumferential surface is installed horizontally, one end of the rotary sorting tube serves as a supply side for scraped rice, and the other end serves as a paddy discharge side. A rotary grain sorting device in which a brown rice receiving trough extending in the axial direction of the sorting tube is disposed in the rotary sorting tube is disclosed in Japanese Patent Application Laid-Open No. 49-24746 as a prior art. There is.

[Problem that the invention seeks to solve]

This rotary grain sorting device repeats a flow in which the fallen rice supplied into the sorting cylinder is scraped up to a certain height by the rotation of the sorting cylinder, and then falls to the bottom, forming a fluidized bed. On the way to the discharge side, brown rice among the fallen rice is lifted up to a relatively high position while being stuck in a recess, and then falls, and paddy among the fallen rice falls from a position lower than the brown rice. Since brown rice that falls from a high position is caught and taken out by the brown rice receiving trough using motion, in order for this sorting action to be performed correctly, the fluidized bed of the fallen rice must have a predetermined thickness. It is necessary to In other words, when the thickness of the fluidized bed in the sorting cylinder is thin or absent, a phenomenon occurs in which the fallen rice dances up in the sorting cylinder due to its rotation, and the brown rice cannot fit into the recesses, making it difficult to sort. Not only will the capacity be reduced, but the paddy that has risen will fall into the brown rice receiving trough, reducing the sorting accuracy.

However, in the prior art, the discharge side of the sorting tube is open and the scraped rice is fed into the supply side, so the thickness of the fluidized bed in the sorting tube increases from the supply side to the discharge side. In the past, it gradually became thinner, but the fallen rice that is fed into the sorting cylinder has gone through the hulling process, and the removal rate in the hulling process is as high as 80%, and it is present in the fallen rice after hulling. Although the amount of paddy is small to begin with, when this washed-out rice flows through the sorting cylinder, it is sorted so that most of the brown rice in the washed-off rice enters the brown rice receiving trough. In the vicinity of the discharge side of the sorting cylinder, almost no fluidized bed of fallen rice was formed, resulting in a significant drop in sorting accuracy and performance.

The present invention solves the above-mentioned problems in the rotary grain sorting device disclosed in the above-mentioned prior art publication.

[Means for solving problems]

Therefore, in the present invention, a rotary sorting tube having a number of concave portions formed on the inner circumferential surface is installed horizontally, one end of the rotary sorting tube is on the supply side of the scraped rice, and the other end is on the side for discharging the paddy. While each side is configured in the rotary sorting cylinder,
In a rotary grain sorting device that is provided with a brown rice receiving trough extending in the axial direction of the sorting tube, the inner peripheral surface of the discharge side of the sorting tube is provided with a tray for collecting rice that has slipped inward into the sorting tube. It is proposed to provide an annular weir that projects inwardly to a height that allows the formation of a fluidized bed.

[Action/effect of the invention]

In this way, on the inner peripheral surface of the discharge side of the sorting tube,
By providing an annular weir that protrudes inward,
A certain amount of fallen rice will accumulate at the weir on the discharge side of the sorting cylinder, and in other words, the thickness of the fluidized bed of fallen rice in the sorting cylinder can be prevented from becoming thinner on the discharge side. , it is possible to reliably form a fluidized bed of dropped rice with an appropriate thickness in the sorting tube from the supply side to the discharge side, and the annular weir is integrated with the sorting tube. By providing this annular weir in a non-rotatable manner relative to the sorting cylinder, it rotates together with the sorting cylinder, and therefore even the fallen rice in contact with this annular weir can be moved in a reliable manner. This prevents the sorting ability from being reduced by the same amount as in the case where the flow movement of the fallen rice in contact with the non-rotating annular weir is obstructed.

Therefore, according to the present invention, when the brown rice is sorted from the fallen rice by rotating the sorting tube having a large number of recesses on the inner circumferential surface so that it enters the brown rice receiving channel at the upper part of the sorting tube, the sorting is carried out. Accuracy and capacity do not deteriorate near the discharge side of the sorting tube unlike in the prior art, and the entire portion of the sorting tube from the supply side to the discharge side can be effectively used for sorting, and the sorting capacity can be improved. This also has the effect of improving sorting accuracy.

〔Example〕

The drawings of an embodiment in which the present invention is applied to a two-stage sorting device for brown rice in a hulling machine will be explained below. The whole is constructed by placing a hulling section C on one side of the upper surface of a wind sorting device B, which is a rectangular box, and placing a two-stage sorting device side by side with this.

The hulling section C consists of a paddy supply hopper 10, a pair of unrolling parts 9, etc.
This is to perform wind sorting of the fallen rice from the hulling section C and the wind speed of the brown rice sorted by the sorting device D, and inside it there is a flow of the fallen rice almost directly below the hulling section C. A sliding rice conveyor 1 is provided in the lower part of the sorting room 3, and a finishing brown rice conveyor 2 is provided in the lower part of the finished brown rice style sorting room 4, and the sliding rice conveyor 1 is provided on the side thereof.
A scraped rice thrower 7 communicating with the finished brown rice conveyor 2 and a finished brown rice thrower 8 communicating with the finished brown rice conveyor 2 are installed upright, and furthermore, a suction dust exhaust fan 5 is installed at one end of the wind sorting device B, and a suction dust exhaust fan 5 is installed at the other end of the wind sorting device B. A suction port 6 is provided in each case.

The two-stage sorting device D separates the grained rice that has been de-aired and selected by the hulling section C and the wind sorting device B into brown rice and paddy, and in this two-stage sorting device D, Reference numerals denote primary and secondary sorting tubes with both ends open and having a large number of concave portions 13 formed on the inner circumferential surface, and the two sorting tubes are arranged in two stages, upper and lower, inside the box-shaped case 12. The feed side X and the discharge side Y of the materials to be sorted are supported by rollers 23 so as to be rotatable in a horizontal state, and the discharge side Y is provided adjacent to the hulling section C. The sorting tube is rotationally driven by a motor M in the wind sorting device B. In this case, the recess 13 has a diameter of 5 to 6.5 mm.
It is preferable to form it into a hemispherical shape with a depth of about 3 to 4 mm.

Inside the upper primary sorting tube 1, a brown rice receiving trough 14 with an open top surface is arranged so as to extend in the axial direction of the sorting tube.
A dropped rice supply conveyor 15 is provided in parallel with the brown rice receiving trough 14, and is arranged on the discharge side Y of the primary sorting cylinder. The paddy supply hopper 10 in the hulling section C is connected to the discharge side Y of the sorting tube.
The paddy discharged from the paddy is expected to enter the paddy supply hopper 10.

Also in the lower secondary sorting cylinder, a top-open finished brown rice receiving trough 17 is arranged so as to extend in the axial direction of the sorting cylinder.

In the figure, reference numerals 21 and 21' are a communication gutter provided on the supply side X to allow the brown rice received in the brown rice receiving gutter 14 in the primary sorting cylinder to flow into the supply side X in the secondary sorting cylinder, and 24 is a communication gutter for secondary sorting. A circulation path 25 communicates the discharge side Y of the cylinder with the dropped rice thrower 7, and a circulation path 25 connects the finished brown rice in the finished brown rice receiving trough 9 in the secondary sorting tube to the finished brown rice winding chamber 4 in the winding device B. This is a passage for leading out onto the downflow plate 26.

Furthermore, the reference numeral 16 in the figure is a supply tank for the fallen rice.
It is attached to the side wall 12' on the upper side of the hulling section C, that is, on the discharge side Y, and the lower part of the supply tank 16 communicates with the starting end of the scraped rice supply conveyor 15 in the primary sorting cylinder, and this supply The tip 7' of the dropped rice thrower 7 opens into the tank 16.

An annular weir 18 is provided on the inner circumferential surface of the discharge side Y of both sorting tubes, respectively, and projects inward by an appropriate height (l). This annular weir 18 may be configured as an inclined weir 19 as shown in FIG. In addition, an annular weir plate 22 is also provided on the inner surface of the supply side X of both sorting tubes to prevent the fallen rice from overflowing from the sorting tubes.

During the hulling operation, the paddy supplied into the paddy supply hopper 10 in the hulling section C is successively removed by a pair of de-rolls 9 to become removed rice, which is then transferred to the wind sorting device. After being wind-selected at B, the rice is conveyed into the supply tank 16 by the dropped rice thrower 7. The scraped rice in the supply tank 16 is transferred to the supply side X by the scraped rice supply conveyor 15, and then sequentially supplied from the other end of the scraped rice supply conveyor 15 to the supply side X in the primary sorting cylinder. be done.

In this way, the fallen rice supplied to the supply side As shown in the figure, it is transferred toward the discharge side Y while forming a fluidized bed S.
On the inner surface of the discharge side Y of the primary sorting tube,
Since the annular weir 18 or 19 is provided, the fluidized bed S can maintain a thickness of (l) even on the discharge side Y as shown in FIG. It can be formed over the entire area from X to the discharge side Y, and the fallen rice in contact with the annular weir 18 or 19 also undergoes the above-mentioned fluid movement. During this flow transfer, the brown rice among the rice that has been rubbed out is removed from the concave portion 13.
After being lifted up to a relatively high position in a state where it is fitted into the brown rice tray 14, it falls from the recess 13 and enters the brown rice receiving trough 14.

The brown rice that has entered the brown rice receiving channel 14 in this way is
From the other end, it flows into the supply side X in the secondary sorting cylinder via the communication gutter 21, 21', and the secondary sorting action is performed. The sorting action in the secondary sorting cylinder is similar to that in the primary sorting cylinder, but the secondary sorting cylinder is adjusted so that only brown rice enters the finishing brown rice receiving channel 9. During the sorting in this secondary sorting tube, the annular weir 18 or 19 is provided on the inner surface of the discharge side Y of the secondary sorting tube, so that the fluidized bed S of a predetermined thickness is discharged from the supply side X. It can be formed over the entire area up to side Y.

Then, while flowing inside the primary sorting cylinder, the discharge side
The scraped rice that moves toward the discharge side Y has more paddy, overflows the annular weir 18 or 19 on the inner periphery of the discharge side Y, and is delivered to the paddy supply hopper 10 in the hulling section C. It is reduced and deactivated again.

On the other hand, a mixture of paddy and brown rice overflows the annular weir 18 or 19 and is discharged from the discharge side Y end of the secondary sorting cylinder 6, and this mixture is discharged from the circulation path 2.
4 and is conveyed again into the supply tank 16 by the dropped rice thrower 7. In addition, the finished brown rice that has entered the finished brown rice receiving channel 9 in the secondary sorting cylinder is transferred to the passage 2.
Finished brown rice style selection chamber 4 flows down from 5 onto the flow down plate 26
After wind selection, the finished brown rice is taken out of the machine from the thrower 8.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a longitudinal sectional front view of the entire hulling machine, Fig. 2 is an enlarged sectional view of the sorting tube,
FIG. 3 is a sectional view taken from the side in FIG. 2, and FIG. 4 is a diagram showing another embodiment of the sorting tube. ,... sorting tube, 14, 17... brown rice catcher,
X... Supply side, Y... Discharge side, 18, 19... Annular weir.

Claims (1)

[Claims] 1. A rotary sorting tube with a number of concave portions formed on its inner circumferential surface is installed horizontally, and one end of the rotary sorting tube is configured as a feed side for scraped rice, and the other end is configured as a side for discharging paddy. On the other hand, in a rotary grain sorting device in which a brown rice receiving trough extending in the axial direction of the sorting tube is disposed in the rotary sorting tube, the inner peripheral surface of the discharge side of the sorting tube has A rotary grain sorting device characterized by having an annular weir protruding inward to a height capable of forming a fluidized bed of fallen rice in a cylinder.