JPH0157634B2 - - Google Patents

Description

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

[Prior art] A rotary sorting cylinder having a number of concave portions formed on its inner circumferential surface is installed horizontally, and a supply portion for mixed rice of brown rice and paddy is provided at one end of the rotary sorting drum, and a supply portion for mixed rice of brown rice and paddy is provided at the other end. A rotary grain sorting device which is equipped with respective paddy discharge sections and is provided with an open-top brown rice receiving trough extending in the axial direction of the sorting barrel within the rotary sorting barrel is based on the prior art. It is disclosed in Japanese Patent Application Laid-open No. 49-24746.

In this rotary grain sorting device, the mixed rice supplied into the sorting barrel is scraped up to a certain height by the rotation of the sorting barrel, and then falls to the bottom while drawing a parabola, repeating the flow to form a fluidized bed. While forming and moving to the discharge side, the brown rice of the mixed rice fits into the recess and is lifted up to a high position, then falls and makes a large parabolic movement, while some of the paddy of the mixed rice Utilizing the fact that even if the brown rice fits into the recess, it falls from a lower position than the brown rice and performs a relatively small parabolic movement, the brown rice that falls from a high position with a large parabolic movement is received by the brown rice receiving gutter and taken out. However, in this case, even if the rice is the same mixture, the way the grains fit into the recesses and the way they slide against the recesses differs depending on the grain size, moisture content, etc. However, some of the paddy makes a relatively small parabolic movement and falls at a low position, while some of the paddy makes almost the same parabolic movement as the brown rice, and is lifted up to a high position and receives the brown rice. It will get mixed into the gutter. Therefore, in order to reduce the number of paddy that enters the brown rice receiving trough and improve the sorting accuracy of brown rice, it is a good idea to reduce the frequency of paddy that fits into the recesses in the sorting barrel, and to reduce the number of paddy that fit into the recesses in the sorting barrel. In order to reduce the frequency of whole paddy, it is necessary to reduce the proportion of paddy contained in the mixed rice flowing as described above in the sorting barrel.

[Problem that the invention seeks to solve]

However, in the rotary grain sorting device of the prior art described above, mixed rice after hulling is supplied to one end of the sorting barrel, and brown rice is extracted from this mixed rice while being discharged from the other end of the sorting barrel. Since the rice is raked up into the brown rice receiving trough and dropped, the proportion of paddy contained in the mixed rice in the sorting barrel tends to further increase as the brown rice in the mixed rice is raked up and dropped into the brown rice receiving trough. exhibits. In other words, since the amount of paddy in the mixed rice flowing in the sorting barrel is large, the frequency of paddy fitting into the recesses on the inner surface of the sorting cylinder increases, and this prevents brown rice from fitting into the recesses. As a result, the number of paddy that enters the brown rice receiving trough increases, and the accuracy of sorting brown rice decreases, as well as the sorting ability.

The present invention provides a rotary grain sorting device of this type, in which a mixed rice receiving gutter is arranged in parallel with a brown rice receiving gutter in the sorting barrel, and the paddy that is lifted to a relatively high position as described above is By allowing the mixed rice to enter the mixed rice receiving trough, the sorting accuracy and sorting ability are improved, while by reducing the length of the paddy that enters the mixed rice receiving trough, the effect of the mixed rice receiving trough is promoted. It is something.

[Means for solving problems]

Therefore, in the present invention, a rotary sorting cylinder having a plurality of concave portions formed on the inner circumferential surface is installed horizontally, and a supply part for mixed rice of brown rice and paddy is placed at one end of the rotary sorting cylinder, and a supply part for mixed rice of brown rice and paddy is placed at the other end. In the rotary grain sorting device, the rotary sorting barrel is provided with a paddy discharge section, and a brown rice receiving trough extending in the axial direction of the sorting barrel is provided in the rotary sorting barrel. Inside, a mixed rice receiving gutter is provided substantially parallel to the brown rice receiving gutter at a portion of the sorting barrel on the mixed rice scraping side relative to the brown rice receiving gutter,
The discharge port of the mixed rice receiving gutter is communicated with the supply part of the sorting cylinder, and the tip of the side plate on the side of the mixed rice scraping up side of the sorting cylinder among the left and right side plates of the mixed rice receiving gutter and the inner circumferential surface of the sorting cylinder. The gap interval is configured to be narrower than the gap interval between the tip of the side plate on the mixed rice scraping side in the sorting cylinder and the inner peripheral surface of the sorting cylinder among the left and right side plates of the brown rice receiving trough.

[Action/effect of the invention]

With this configuration, as the sorting cylinder rotates, the brown rice that is fitted into the recess on the inner surface and lifted to a relatively high position enters both the brown rice receiving trough and the mixed rice receiving trough. However, since the mixed rice receiving trough is closer to the mixed rice raking side in the sorting barrel than the brown rice receiving trough, a small amount of paddy enters the mixed rice receiving trough along with the brown rice.

However, the proportion of paddy contained in the mixed rice that enters the mixed rice receiving trough as the sorting cylinder rotates is considerably smaller than the proportion of paddy in the mixed rice supplied to the sorting cylinder. By introducing the mixed rice in the rice receiving trough from the discharge port of the mixed rice receiving trough to the supply section at one end of the sorting cylinder, the proportion of paddy in the mixed rice flowing as described above in the sorting cylinder is As the brown rice entering the mixed rice receiving trough is diluted and lowered by mixing, the proportion of paddy in the mixed rice flowing in the sorting barrel is lower than when the mixed rice receiving trough is not used. This will result in a decline.

Therefore, the frequency of paddy fitting into the large number of recesses on the inner surface of the sorting barrel decreases, and the number of brown rice fitting into the recesses increases accordingly, and accordingly, the number of paddy entering the brown rice receiving trough also decreases. As the number of brown rice increases over time, not only the accuracy of sorting brown rice can be significantly improved, but also the sorting capacity can be increased.

In this case, in order to increase the amount of brown rice that enters the brown rice receiving gutter and mixed rice receiving gutter, the gap between the tip of the side plate on the mixed rice scraping side of the sorting cylinder of both receiving gutter and the inner peripheral surface of the sorting cylinder. However, in addition to widening the gap between the tip of the side plate on the mixed rice scraping side inside the sorting cylinder of the brown rice receiving trough and the inner peripheral surface of the sorting cylinder, If the gap between the tip of the side plate on the scraping side of the mixed rice inside the sorting cylinder and the inner circumferential surface of the sorting cylinder is widened, a relatively large amount of the mixed rice flowing inside the sorting cylinder will increase as the sorting cylinder rotates. Among the paddy that moves parabolically, many of the paddy
Paddy enters the mixed rice receiving gutter through the wide gap between the tip of the side plate on the mixed rice scraping side of the sorting cylinder and the inner peripheral surface of the sorting cylinder in the mixed rice receiving gutter.In other words, the paddy enters the mixed rice receiving gutter. As the amount of mixed rice increases, the effect of installing a mixed rice catcher will be diminished.

In contrast, in the present invention, as described above, the gap between the tip of the side plate and the inner circumferential surface of the sorting cylinder on the mixed rice scraping side in the sorting cylinder of the mixed rice receiving gutter is adjusted to The gap is narrower than the gap between the tip of the side plate and the inner circumferential surface of the sorting cylinder on the rice scraping side. With this structure, the mixed rice flowing inside the sorting cylinder is separated by the rotation of the sorting cylinder. The relatively large paddy that moves parabolically hits the surface of the side plate on the mixed rice scraping side inside the sorting barrel of the mixed rice receiving trough and falls directly to the bottom of the sorting barrel, so that the paddy that enters the mixed rice receiving trough While the amount of brown rice can be regulated to a small amount, the amount of brown rice entering the brown rice receiving trough does not decrease.

That is, according to the present invention, the effect of providing the mixed rice receiving trough, that is, the ability to improve the sorting accuracy and sorting ability of brown rice can be surely promoted.

〔Example〕

Next, a description will be given of an embodiment in which the present invention is applied to the primary sorting of a two-stage rotary sorting device in a rice hulling sorter. The hulling and sorting machine A consists of a wind sorting device B which is a rectangular box, a hulling section C mounted on the top of the wind sorting device B, and a two-stage rotary sorting device D. It is configured.

In the wind sorting device B, a mixed rice conveyor 1 configured to double as a mixed rice thrower shaft and a brown rice conveyor 2 configured to double as a brown rice thrower shaft are installed in parallel,
The mixed rice conveyor 1 is installed at the bottom of the winnowing chamber 3 for the scraped rice removed by the hulling section C, and the brown rice conveyor 2 is installed at the bottom of the winnower chamber 4 for the finished brown rice. A suction dust extractor 5 is provided at one end in the longitudinal direction of the wind sorting device B, and atmospheric suction ports 6, 6' are provided at the other end and the top surface, respectively.
After the wind introduced into the wind selection device B from 6' passes through the wind selection chamber 4 and the small rice wind selection chamber 30 for the finished brown rice and the wind selection chamber 3 for the fallen rice,
It is designed to be sucked into a suction dust remover 5.

The mixed rice conveyor 1 is installed on the side of the wind sorting device B.
A mixed rice thrower 7 communicating with the brown rice conveyor 2 and a brown rice thrower 8 communicating with the brown rice conveyor 2 are provided, and the hulling section C includes a paddy supply hopper 10 and a pair of left and right unrolling 9. A wind-selecting chamber 3 for the fallen rice is visible below the unrolled rice 9.

The two-stage rotary sorting device D includes a primary sorting cylinder and a secondary sorting cylinder horizontally disposed in two upper and lower stages in a box-like case 12, and both sorting cylinders are supported rotatably, respectively. A large number of recesses 13 are formed on the inner surface of the recesses, the size of which is large enough to fit brown rice. In this case, the recess 13 has an inner diameter of about 5 to
A hemispherical shape with a diameter of 6.5 mm and a depth of about 3 to 4 mm is suitable.

Further, the primary sorting cylinder and the secondary sorting cylinder are
Both ends thereof are open, and the axis thereof is perpendicular to the axis of the de-rolling 9, and both of these sorting cylinders are driven by a belt driven by a motor M provided in the wind sorting device B. It is rotationally driven in the right direction as shown by the arrow in FIG.

Inside both sorting cylinders, various types of receiving troughs such as brown rice receiving troughs are arranged so as to extend in the axial direction of the sorting cylinders. That is, in the primary sorting cylinder, a brown rice receiving gutter 18 having a spiral conveyor 14 therein is arranged such that both ends of the brown rice receiving gutter 18 are fixed to the box-shaped case 12, and this brown rice receiving gutter 18 is provided with a spiral conveyor 14 therein. On the left side of the gutter 18, that is, on the side where the mixed rice is scraped up in the primary sorting cylinder, there is a mixed rice receiving gutter 21 which also has a spiral conveyor 15 inside the brown rice receiving gutter 18.
It is arranged almost parallel to. On the other hand, inside the secondary sorting cylinder, there are a finished brown rice receiving trough 25 having a built-in spiral conveyor 16 and a small rice receiving trough 17 having a built-in spiral conveyor 27. It is arranged so as to be located on the scraping side of the brown rice.

The tank 29 provided above one end of the box-like case 12 has an upper end outlet 7' connected to the mixed rice thrower 7.
On the other hand, the lower part of the tank 29 is connected to one end of the mixed rice receiving trough 21 in the primary sorting cylinder, and the other end outlet 21a of the mixed rice receiving trough 21 is connected to the inside of the supply side' at the other end of the primary sorting cylinder. A chute 20 is provided at the other end of the brown rice receiving trough 18 in the primary sorting cylinder, and a chute 20 is provided below the discharge side at one end of the primary sorting cylinder and communicates with the paddy supply hopper 10 in the hulling section C. , shoot 3
1, a chute 23 is connected to the feed side' at the other end of the secondary sorting cylinder, and below the discharge side' at one end of the secondary sorting cylinder, the chute 23 is connected to the mixed rice conveyor 1 in the wind sorting device B. Also provided is a finished brown rice catcher 25 in the secondary sorting cylinder.
One end outlet is communicated with the finishing brown rice finishing chamber 4 in the wind sorting device B through the chute 24, and one end outlet of the small rice receiving trough 17 in the secondary sorting cylinder is connected to the finishing brown rice finishing chamber 4 in the wind sorting device B. It communicates with the chamber 30 via a chute (not shown).

Of the left and right side plates of the brown rice receiving trough 18, a side plate 18' on the left side, that is, on the mixed rice scraping up side in the sorting cylinder, and a side plate 18' of the left and right side plates of the mixed rice receiving trough 21 for scraping up mixed rice inside the sorting cylinder. In extending the side plate 21' on the side upward toward the inner peripheral surface of the sorting cylinder,
The gap distance (l2) between the tip 21'' of the side plate 21' on the mixed rice scraping side inside the sorting cylinder and the inner circumferential surface of the sorting cylinder among the left and right side plates of the mixed rice receiving trough 21,
Of the left and right side plates of the brown rice receiving trough 18, the space is narrower than the gap (l1) between the tip of the side plate 18' on the mixed rice scraping side in the sorting cylinder and the inner circumferential surface of the sorting cylinder.

When paddy is supplied to the paddy supply hopper 10 during operation, the mixed rice removed by the huller C is removed by the wind flowing toward the suction dust remover 5 in the wind sorting chamber 3 for removed rice, and the rice husks are removed. After being removed, the mixed rice enters the mixed rice conveyor 1, and this mixed rice is sent to the mixed rice receiving trough 21 in the primary sorting cylinder through the mixed rice thrower 7 and the tank 29, and then to the exit of the mixed rice receiving trough 21. From 21a, it is supplied to the supply side' in the primary sorting cylinder.

The mixed rice thus supplied into the primary sorting cylinder is scraped up to a certain height by the rotation of the primary sorting cylinder in the right direction, and then falls to the bottom, forming a fluidized bed and passing through the primary sorting cylinder. It is transferred toward the discharge side of the sorting cylinder.

During this flow, the brown rice in the mixed rice is lifted up to a relatively high place while fitting into the recess 13 on the inner surface of the primary sorting cylinder.
The rice falls into both the mixed rice receiving gutter 21 and the brown rice receiving gutter 18, but the mixed rice receiving gutter 21 is located on the side of the brown rice receiving gutter 18 in which mixed rice is scooped up in the primary sorting cylinder. Therefore, a small amount of paddy will enter the mixed rice receiving trough 21 together with brown rice, but the amount of paddy entering the mixed rice receiving trough 21 is determined by the amount of paddy that enters the mixed rice receiving trough 21 between the left and right side plates inside the sorting barrel. The gap distance (l2) between the tip 21'' of the side plate 21' on the side for scraping up mixed rice and the inner peripheral surface of the sorting cylinder is determined by the side plate 18' on the side for scraping up mixed rice of the sorting cylinder among the left and right side plates of the brown rice receiving trough 18. By arranging the gap between the tip of the mixed rice conveyor 1 and the inner circumferential surface of the sorting cylinder to be narrower than the gap (l1), it is possible to control the amount of paddy to a small amount. The ratio will be lowered by mixing and diluting the brown rice entering the mixed rice receiving trough 21.

That is, most of the brown rice in the primary sorting barrel enters the brown rice receiving channel 18 by making a large parabolic motion as shown by arrow A in Figure 2, and some of the brown rice enters the brown rice receiving channel 18 as shown by arrow A in Figure 2. As shown in (a), by making a parabolic movement smaller than A, the ratio of paddy in the mixed rice entering the mixed rice receiving trough 21 and being supplied into the primary sorting barrel is reduced, while the release of paddy in the primary sorting barrel is reduced. The mainstream of object motion is smaller than the parabolic motion (a) and (b) of brown rice, but some rice grains exhibit parabolic motion that is close to the parabolic motion (b) of brown rice.

In this case, the gap distance (l1) between the tip of the side plate 18' and the inner peripheral surface of the sorting cylinder on the side of the brown rice receiving trough 18 for scraping up mixed rice in the sorting cylinder, and the side of the brown rice receiving trough 21 for scraping up mixed rice in the sorting cylinder. When the gap distance (l2) between the tip 21'' of the side plate 21' and the inner circumferential surface of the sorting cylinder is widened, the amount of brown rice entering the brown rice receiving gutter 18 can be increased, but the parabolic movement of the brown rice can be increased. All of the paddy that moves parabolically close to (b) enters the mixed rice receiving trough 21, and the amount of paddy entering the mixed rice receiving trough 21 increases. The gap distance (l2) between the tip 21'' of the side plate 21' on the rice scraping side and the inner circumferential surface of the sorting cylinder is determined by the side plate 1 on the mixed rice scraping side in the sorting cylinder of the brown rice receiving trough 18.
Gap distance between the tip of 8' and the inner peripheral surface of the sorting cylinder (l1)
By making it narrower, the parabolic motion of the brown rice (b)
A very small portion of the paddy with a large parabolic motion exceeds the tip 21'' and enters the mixed rice catcher 21, while the remaining paddy hits the surface of the side plate 21'. Therefore, the amount of paddy entering the mixed rice receiving trough 21 can be regulated to a small amount, while the amount of brown rice entering the brown rice receiving trough 18 can be increased.

In addition, the mixed rice receiving gutter 21 in this embodiment is as follows:
It is also used as a supply gutter to transfer the mixed rice after deairing and sorting to the primary sorting cylinder.

After the brown rice is removed into the mixed rice receiving gutter 21 and brown rice receiving gutter 18 in the primary sorting cylinder as described above, the mixed rice is transferred to the discharge side of the primary sorting cylinder.
The paddy is then sent to the paddy supply hopper 10 via the chute 20, where it is de-loaded again. On the other hand, the brown rice that has entered the brown rice receiving trough 18 in the primary sorting cylinder is sent to the secondary sorting cylinder via the chute 31, where it is sorted again.

In other words, the brown rice fed into the secondary sorting cylinder flows as described above while flowing through the discharge side.
In the process of being transferred to the finished brown rice receiving trough 25, the rice is sorted so that it enters the finished brown rice receiving trough 25, and the milled rice enters the milled rice receiving trough 17, and then flows out from the discharge side to the mixed rice conveyor 1 via the chute 23. , the finished brown rice that has entered the finished brown rice receiving channel 25 is transferred to the chute 2.
After entering the brown rice conveyor 2 via the brown rice conveyor 4, the brown rice is taken out of the machine by the brown rice thrower 8.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional front view of the entire hulling and sorting machine, and FIG. 2 is taken along line X-X in FIG.
FIG. ... Sorting cylinder, 13 ... recess, ' ... supply side,
″...Discharge side, 18...Brown rice receiving gutter, 21...Mixed rice receiving gutter, 18'...Side plate on the mixed rice scraping side in the sorting cylinder of the brown rice receiving gutter, 21'...Sorting of the mixed rice receiving gutter Side plate on the mixed rice scraping side inside the barrel.

Claims (1)

[Claims] 1. A rotary sorting cylinder with a number of concave portions formed on its inner peripheral surface is installed horizontally, and one end of the rotary sorting cylinder has a supply section for supplying mixed rice of brown rice and paddy, and the other end has a paddy discharge section. In a rotary grain sorting device, the rotary sorting barrel is equipped with a brown rice receiving trough extending in the axial direction of the sorting barrel, and the rotary sorting barrel is equipped with the A mixed rice receiving gutter is provided approximately parallel to the brown rice receiving gutter at a portion of the sorting cylinder on the mixed rice scraping side with respect to the brown rice receiving gutter, and a discharge port of the mixed rice receiving gutter is connected to a supply part of the sorting cylinder. While communicating,
The gap between the tip of the side plate on the side for scraping up the mixed rice inside the sorting cylinder and the inner peripheral surface of the sorting cylinder among the left and right sides of the left and right sides of the mixed rice receiving trough is determined by the mixed rice inside the sorting cylinder among the left and right sides of the left and right sides of the brown rice receiving trough. A rotary grain sorting device characterized in that the gap is narrower than the gap between the tip of the side plate on the scraping side and the inner peripheral surface of the sorting cylinder.