JPS6052874B2 - Rotary grain sorting device - 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. Japanese Unexamined Patent Publication No. 49-24 as
It is disclosed in Japanese Patent No. 746.

In this rotary grain sorting device, the mixed rice fed into the sorting barrel is scraped up to a certain height by the rotation of the sorting barrel, and then falls to the bottom.The rice is then repeatedly flowed to form a layer on the discharge side. During the sequential movement, the brown rice of the mixed rice fits into the recess and is lifted up to a high position and then falls, and some of the paddy of the mixed rice fits into the recess but falls from a lower position than the brown rice. By doing the exercises that
Brown rice that falls from a high position is caught in a brown rice catcher and taken out, but in this case, even if it is the same brown rice, the degree to which it fits into the brown rice differs depending on the grain size, moisture content, etc. Therefore, some of the brown rice falls at a relatively low level, and a small portion of the paddy is lifted up to a relatively high level and ends up getting mixed into the brown rice gutter. Become.

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. [Problems to be solved by the invention] However, the prior art rotary grain sorting device described above has the following problems:
The mixed rice after hulling is supplied to one end of the sorting cylinder,
Since the brown rice from this mixed rice is scooped up and dropped into the brown rice receiving trough as it is sequentially discharged from the other end of the sorting cylinder, the proportion of paddy contained in the mixed rice in the sorting cylinder is the same as that of the mixed rice. As the brown rice is scooped up and dropped into the brown rice receiving trough, the price tends to rise further.

In other words, since the amount of paddy in the mixed rice flowing in the sorting barrel is large, the frequency of paddy getting stuck in the recesses on the inner surface of the sorting barrel increases.
This prevents the brown rice from fitting into the recesses, and therefore the number of paddy entering the brown rice receiving trough increases, reducing the accuracy of sorting brown rice and the sorting ability. The present invention overcomes the above-mentioned drawbacks in rotary grain sorting devices.

[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, each of the rotary sorting barrels is provided with a paddy discharge section, and a brown rice receiving trough with an open top surface extending in the axial direction of the sorting barrel is disposed inside the rotary sorting barrel. Inside the rotary sorting barrel,
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 the discharge port of the mixed rice receiving gutter is connected to the supply section of the sorting cylinder. The structure is designed to reflect the vision of the world.

[Operations and Effects of the Invention] With this structure, as the sorting cylinder rotates, the brown rice that has been lifted up to a relatively high position while fitting into the recess on the inner surface of the sorting cylinder is transferred to the inside of the brown rice receiving gutter and the mixed rice receiving channel. Although it enters both the inside of the gutter and the mixed rice receiving gutter, the mixed rice receiving gutter is on the side where the mixed rice is raked up inside the sorting barrel rather than the brown rice receiving gutter. Because it is close to
A small amount of paddy is contained together with brown rice in the mixed rice receiving trough.

However, the ratio of paddy contained in the mixed rice in this mixed rice receiving trough is considerably smaller than the ratio of paddy in the mixed rice supplied to the sorting barrel, so the mixed rice in this mixed rice receiving trough is ! By introducing the mixed rice from the discharge port of the mixed rice receiving trough into 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 follows:
The paddy from the mixed rice receiving trough is diluted and lowered by introducing and mixing a low proportion of mixed rice. That is, according to the present invention, it is possible to reduce the proportion of paddy in the mixed rice flowing in the sorting drum, and the frequency of paddy fitting into the many recesses on the inner surface of the sorting drum is reduced, and the number of paddy fitting into the recesses increases accordingly. As the number of brown rice increases, the number of paddy entering the brown rice receiving trough also decreases, and the number of brown rice increases, which not only significantly improves the accuracy of sorting brown rice, but also increases the sorting capacity. have

In this case, according to experiments, the ratio of brown rice to the mixed rice supplied to the sorting barrel was 80 to 85%, but the ratio of brown rice to the mixed rice in the mixed rice receiving trough was 90 to 95%, and the ratio of brown rice to the mixed rice in the mixed rice receiving trough was 90 to 95%. Within this range, B could be improved by 99.9% or more.

〔Example〕

Next, an embodiment in which the present invention is applied as a sorting device in a rice hulling sorting machine will be described. FIG.
The entire structure is composed of a wind sorting device B which is a rectangular box, a hulling section C mounted on the top surface of the wind sorting device B, and a rotary sorting device D.

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.
is at the bottom of the wind sorting chamber 3 for the scraped rice that has been deweighed in the hulling section C, and the brown rice conveyor 2 is at the bottom of the wind sorting chamber 4 for the finished brown rice.
They are located at the bottom of the inside.

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. The introduced wind passes through the wind selection chamber 4 for the finished brown rice, the wind selection room 30 for small rice, and the wind selection room 3 for the ground rice, and then is sucked into the suction dust extractor 5. A mixed rice thrower 7 communicating with the mixed rice conveyor 1 and a brown rice thrower 8 communicating with the brown rice conveyor 2 are provided on the side surface of the wind sorting device B.
In addition, the hulling section C includes a paddy supply hopper 10 and a pair of left and right deweighing rolls 9, and below the deweighing rolls 9 there is a winnowing chamber 3 for the scraped rice. I'm here.

The rotary sorting device D includes a primary sorting cylinder 1 and a secondary sorting cylinder (2) horizontally disposed in upper and lower stages in a box-like case 12, and both sorting cylinders 1, (2) are each rotatably supported and A large number of recesses 13 are formed on the inner surface of the recesses, each having a size large enough to fit brown rice.

In this case, the recess 13 has an inner diameter of about 5 to 6.5 mm and a depth of about 3 to 4 Wr! ! A hemispherical shape of L is appropriate. The primary sorting cylinder 1 and the secondary sorting cylinder (2) are both open at both ends, and their axes are perpendicular to the axis of the deweighing roll 9. is rotationally driven in the right direction as shown by the arrow in FIG. 2 by a belt transmission from a motor M provided in the wind selection device B. Various types of receiving channels, such as a brown rice receiving channel, are arranged in both the sorting cylinders 1 and (2) so as to extend in the axial direction of the sorting cylinders.

That is, a spiral conveyor 1 is installed inside the primary sorting cylinder 1.
A brown rice receiving trough 18 having a brown rice receiving trough 18 is arranged such that both ends of the brown rice receiving trough 18 are fixed to the box-shaped case 12. A mixed rice receiving trough 21 having a spiral conveyor 15 therein is disposed substantially parallel to the brown rice receiving trough 18 on the scraping side. On the other hand, inside the secondary sorting cylinder 1, there is a finished brown rice receiving trough 25 with 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 side where the brown rice is scraped up inside.
A tank 29 provided above one end of the box-like case 12 has an outlet at the upper end of the mixed rice thrower 7, and
The lower part of the tank 29 is connected to one end of the mixed rice receiving gutter 21 in the primary sorting barrel 1, and the other end of the mixed rice receiving gutter 21 is connected to the outlet 2.
A chute 20 is provided which opens into the supply side 1'' at the other end of the primary sorting cylinder 1 and communicates with the paddy supply hopper 10 in the hulling section C below the discharge side 1'' at one end of the primary sorting cylinder 1. , the outlet on the other end side of the brown rice receiving trough 18 in the primary sorting cylinder 1 is communicated with the supply side ``'' at the other end of the secondary sorting cylinder 1 through the chute 31, A chute 23 communicating with the mixed rice conveyor 1 in the wind sorting device B is provided below the discharge side 1'' at one end, and a finished brown rice receiving trough 2 in the secondary sorting cylinder 2 is provided.
5 communicates through a chute 24 with the finishing brown rice sorting chamber 4 in the wind sorting device B, and furthermore, a secondary sorting cylinder (1).
One end of the outlet of the small rice receiving trough 17 inside is communicated with the small rice wind sorting chamber 30 in the wind sorting device B through a chute (not shown).

In addition, the brown rice receiving gutter 18, the mixed rice receiving gutter 21, the finished brown rice receiving gutter 25, and the small rice receiving gutter 17 are provided with regulating gate valves 19, 22, 26, 2 which are rotatably operated from the outside of the box-shaped case 12.
8 are provided respectively.

Therefore, when paddy is supplied to the paddy supply hopper 10 during operation, the mixed rice deweighed by the huller C is removed by the wind flowing toward the suction dust remover 5 in the wind sorting chamber 3 for scraped rice. After the shells are removed, the mixed rice enters the mixed rice conveyor 1, and this mixed rice is sent to the mixed rice receiving gutter 21 in the primary sorting cylinder 1 via the mixed rice thrower 7 and the tank 29, and then transferred to the mixed rice receiving gutter. From the outlet 2 of 21, it is supplied to the supply side ■'' in the primary sorting cylinder 1. The mixed rice thus supplied into the primary sorting cylinder 1 is scraped up to a certain height by the rotation of the primary sorting cylinder 1 in the right direction, and then repeatedly flows to fall to the bottom, forming a fluidized bed. Tsutsu primary sorting cylinder 1
is transferred toward the discharge side pi. During this flow,
The brown rice in the mixed rice is stored in the recess 1 on the inner surface of the primary sorting cylinder 1.
3 is lifted up to a relatively high place and then falls from the recess 13, thereby entering both the mixed rice receiving trough 21 and the brown rice receiving trough 18.

In this case, the mixed rice receiving trough 21 is located on the side of the brown rice receiving trough 18 that scoops up the mixed rice in the primary sorting cylinder 1, so some paddy enters the mixed rice receiving trough 21 along with the brown rice. However, since the amount of paddy is small, the proportion of paddy in the mixed rice supplied from the mixed rice conveyor 1 into the primary sorting cylinder 1 is equal to the mixing dilution of the brown rice entering the mixed rice receiving trough 21. It will be lowered. Therefore, the mixed rice receiving trough 21 in this embodiment is used in combination with the supply trough for transferring the mixed rice after deweighing and air sorting to the primary sorting cylinder 1.

After the brown rice is removed into the mixed rice receiving trough 21 and the brown rice receiving trough 18 in the primary sorting cylinder 1 as described above, the mixed rice is transferred from the discharge side pi of the primary sorting cylinder 1 through the chute 20 to unhulled rice. It is sent to the supply hopper 10 and subjected to the deweighing action again.

On the other hand, the brown rice that has entered the brown rice receiving trough 18 in the primary sorting cylinder 1 is sent to the secondary sorting cylinder ■ via the chute 31.
Here they are selected again. That is, the brown rice supplied into the secondary sorting cylinder 2 flows as described above and is transferred to the discharge side 25 while the brown rice is transferred to the finished brown rice receiving trough 25 and the small rice is transferred to the small rice receiving trough 25. After the rice is sorted into the mixed rice conveyor 1 through the chute 23 from the discharge side pipe, the finished brown rice that has entered the finished brown rice receiving trough 25 is transferred to the brown rice conveyor 2 through the chute 24. After entering the brown rice, it is taken out of the machine through 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 a sectional view taken along the line XX in FIG. 1. 1... Primary sorting cylinder, ■... Secondary sorting cylinder, 13...
Concave portion, I″, ■″... Supply side, Pi, ■″... Discharge side, 18, 17... Brown rice receiving gutter, 21, 32... Mixed rice receiving gutter.

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. While each is equipped with
In the rotary grain sorting device, the rotary sorting barrel is provided with a brown rice receiving trough with an open top surface extending in the axial direction of the sorting barrel, wherein the brown rice receiving trough is disposed in the rotary sorting barrel. On the other hand, a mixed rice receiving gutter is provided in a part of the sorting cylinder on the mixed rice scraping side, approximately in one line with the brown rice receiving gutter, and the discharge port of the mixed rice receiving gutter is connected to the supply part of the sorting cylinder. A rotary grain sorting device characterized by a