JPH0374151B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a huller sorting system in which paddy is removed in a huller, the rice husks are air-sorted in a wind sorter, and then only brown rice is sorted and taken out. It is related to the device.

[Conventional technology]

Conventionally, this type of huller sorting equipment often used a swinging sorting mechanism to sort brown rice.
This oscillating sorting mechanism has drawbacks such as being large and generating large vibrations and noise, so Japanese Patent Application Laid-Open No. 49-24745 as a prior art
To sort brown rice from the mixed rice that has been removed, a rotary sorting mechanism is used, which consists of a horizontally rotating sorting barrel with many recesses formed on its inner circumferential surface, and a brown rice receiving trough with an open top. I am proposing to do so.

[Problem that the invention seeks to solve]

However, in the hulling and sorting device described in this prior art publication, the mixed rice is supplied to one end of the sorting cylinder close to the hulling part of the rotary sorting mechanism, and the other end of the sorting cylinder is connected to the paddy discharge side. The paddy discharged from the discharge side is returned to the hulling section and removed again through a transfer means disposed outside the sorting barrel, so that the overall efficiency of the hulling and sorting device is improved. The size becomes larger due to the fact that the transfer means for recirculating and transferring the discharged paddy from the discharge side of the sorting cylinder to the hulling section is disposed outside the sorting cylinder, in other words, the hulling and sorting device becomes large. There were flaws.

On the other hand, in this type of rotary sorting mechanism, the mixed 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. However, as the mixed rice moves to the discharge side, 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 mixed rice is lower than the brown rice even though it fits into the recess. This method utilizes the motion of falling from a high position to catch brown rice falling from a high position into a brown rice receiving trough. Because the degree of paddy settling differs slightly depending on the size, moisture content, etc., some of the brown rice falls at a relatively low position, whereas a small portion of the paddy is lifted up to a relatively high position. This will cause the brown rice to get mixed into the brown rice receiving trough. Therefore, in order to improve the accuracy of sorting brown rice by reducing the number of rice grains that enter the brown rice receiving trough, it is a good idea to reduce the frequency of rice grains that fit into the recesses in the sorting barrel as much as possible.

However, the rotary sorting mechanism in the prior art hulling and sorting device supplies the mixed rice after hulling into the supply side at the other end of the sorting cylinder, and discharges it from the discharge side at one end of the sorting cylinder. Since the brown rice from this mixed rice is scraped up into the brown rice receiving trough and dropped, the proportion of paddy contained in the mixed rice in the sorting barrel is determined by the amount of rice in the mixed rice being scraped into the brown rice receiving trough. It tends to become higher as it is raised and lowered. In other words, since the amount of rice in the mixed rice flowing in the sorting barrel is large, the frequency of rice fitting into the recesses on the inner surface of the sorting cylinder increases, and this prevents brown rice from fitting into the recesses.

Furthermore, in the rotary sorting mechanism of the prior art, the mixed rice that has been removed is dropped from a relatively high position onto a wide part of the inner circumferential surface on the supply side at one end of the sorting cylinder. The mixed rice falls with considerable force onto the inner circumferential surface of the sorting cylinder where a fluidized bed of mixed rice is not formed, and is fed from a high position onto the inner circumferential surface of the sorting cylinder. Because the paddy is scattered over a wide area due to collisions caused by falling and rotational movement of the sorting cylinder, and does not immediately form a fluidized bed, the frequency of paddy getting stuck in the recesses increases.
Since this prevents the brown rice from fitting into the recesses, this, together with the high proportion of paddy contained in the mixed rice in the sorting barrel as described above, reduces the accuracy of sorting the brown rice. At the same time, the ability to sort brown rice also deteriorated.

An object of the present invention is to provide a rice hulling sorting device that solves these problems.

[Means for solving problems]

For this reason, the present invention provides a wind sorting section for the mixed rice from the hulling section at the lower part of the hulling section, while
A rotary sorting mechanism equipped with a brown rice receiving trough with an open top surface extending in the axial direction within a rotary sorting barrel having a plurality of recesses formed on the inner peripheral surface on the side of the hulling section;
One end of the sorting cylinder in the rotary sorting mechanism is arranged so as to be located on the hulling section side, one end of the sorting cylinder in the rotary sorting mechanism is placed on the discharge side, and the other end of the sorting cylinder is placed on the supply side. and in which the discharge side of the sorting barrel in the rotary sorting mechanism is communicated with the paddy supplying point in the hulling section, wherein the sorting barrel in the rotary sorting mechanism contains the unpolished rice. A mixed rice receiving gutter with an open top is provided approximately parallel to the brown rice receiving gutter at a portion of the sorting cylinder on the mixed rice scraping side relative to the mixed rice receiving gutter, and a mixed rice receiving gutter is provided on the supply side of the sorting cylinder in the fitted rice receiving gutter. The provided supply port is opened in the supply side of the sorting cylinder in a downward direction substantially perpendicular to the axis of the sorting cylinder, while a portion of the mixed rice receiving trough located on the discharge side of the sorting cylinder is provided with a feed port in the wind sorting section. A means for transporting the mixed rice after rice husk sorting is provided, and the supply port of the mixed rice receiving trough is located near the lower end of the mixed rice fluidized bed in the sorting barrel and at a low height. It has a well-positioned configuration.

[Action/effect of the invention]

In this configuration, the paddy supplied to the huller is dehulled in the huller, and the mixed rice after the dehulling is sorted and removed from the chaff in the wind sorting part, and then transferred to the sorting barrel of the rotary sorting mechanism. The mixed rice enters one end of the mixed rice receiving trough, is sent by the mixed rice receiving trough to the supply port of the mixed rice receiving trough, and is then dropped and supplied from the supply port into the supply side of the sorting cylinder. The mixed rice thus 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 repeatedly, forming a fluidized bed as it moves to the discharge side. In the process, the brown rice that has been lifted up to a relatively high position while being fitted into the recess on the inner surface of the sorting barrel enters both the brown rice receiving gutter and the mixed rice receiving gutter, but this mixed rice receiving gutter is , is closer to the side of the mixed rice receiving trough in the sorting channel than the brown rice receiving trough, so the mixed rice receiving trough is
Some paddy is added along with the brown rice.

However, the proportion of paddy that enters the mixed rice receiving trough as the sorting barrel rotates in this way is considerably higher than the proportion of paddy in the mixed rice that enters the inflow section of the mixed rice receiving trough from the hulling section. Since the grain size is small, the proportion of paddy in the mixed rice supplied from the huller into the mixed rice receiving trough is diluted and lowered by the brown rice that enters the mixed rice receiving trough as the sorting cylinder rotates. Therefore, the proportion of paddy in the mixed rice flowing in the sorting barrel will be lower than when the mixed rice receiving trough is not used. As the frequency of this decreases, the number of brown rice that fits into the recess increases accordingly.
Along with this, the number of paddy entering the brown rice receiving trough also decreases, and the number of brown rice increases.

In addition, the supply port from the mating rice catcher to the inside of the sorting barrel is
By being located near the lower end of the mixed rice fluidized bed in the sorting drum and at a lower height, the mixed rice supplied into the sorting drum can be transferred to the mixed rice fluidized bed formed in the sorting drum. On the other hand, the supplied mixed rice flows into the vicinity of the lower end and immediately forms a fluidized bed, while the supplied mixed rice falls from a low position with respect to the fluidized bed, reducing the spread of the fluidized bed due to falling supply. This supplied mixed rice can be prevented from scattering widely due to falling supply from a relatively high position to a place where a fluidized bed is not formed as in the prior art, and as a result, a large number of rice on the inner surface of the sorting cylinder can be reduced. As the frequency of paddy fitting into each recess decreases, the number of brown rice fitting into the recess increases accordingly, and accordingly, the number of paddy entering the brown rice receiving trough decreases, and the number of brown rice increases. be.

Furthermore, by arranging the supply port from the mixed rice receiving trough to the sorting cylinder in a downward direction substantially perpendicular to the axis of the sorting cylinder and opening into the supply side of the sorting cylinder, one end of the sorting cylinder on the supply side can be opened. The entire length of the sorting cylinder can be used effectively for sorting.

Moreover, one end of the rotary sorting barrel of the rotary sorting mechanism that is close to the hulling section is set as the discharge side, and the mixed rice from the wind sorting section after hulling is transferred to the mixed rice located in the sorting barrel as described above. By having the mixed rice receiving trough transfer and supply the rice into the supply side of the sorting barrel, the mixed rice receiving trough has the effect of reducing the proportion of paddy in the mixed rice from the hulling section, and also reduces the amount of paddy in the mixed rice. Since the function of transferring the grains to the supply side of the sorting cylinder is performed at the same time, it is possible to omit providing a separate transfer means for transferring the grains outside the sorting cylinder as in the prior art.

Therefore, according to the present invention, the proportion of paddy in the mixed rice in the sorting barrel can be lowered as described above, and the mixed rice is not scattered over a wide area when the mixed rice is fed into the sorting barrel as described above. In combination with the ability to prevent this, it is possible to synergistically increase the number of brown rice that fits into the many recesses on the inner surface of the sorting cylinder, so not only can the accuracy of brown rice sorting be significantly improved, but also the above-mentioned problems can be achieved. In addition, since the entire length of the sorting barrel can be effectively used for sorting, the ability to sort brown rice can be significantly improved.In addition, as mentioned above, the mixed rice receiving trough can handle the mixed rice from the hulling section. In addition to simultaneously performing the function of reducing the proportion of paddy in the rice and the function of transporting the mixed rice, it is possible to omit the provision of a separate transport means for transporting the grains as in the prior art. This has the effect that it is possible to avoid increasing the size of the entire rice hulling sorting device using a rotary sorting mechanism, and it is also possible to reduce the weight of the hulling sorting device.

〔Example〕

Next, an embodiment of the present invention will be explained with reference to the drawings. Fig. 1 shows a longitudinal sectional front view of the entire hulling and sorting device A. , the hulling section C mounted on the upper surface of the wind sorting section B, and a two-stage rotary sorting mechanism D constitute the entire structure.

In the wind sorting section B, a mixed rice conveyor 1 configured to serve as a mixed rice thrower shaft and a brown rice conveyor 2 configured to serve as a brown rice thrower shaft are installed side by side. The brown rice conveyor 2 is disposed at the bottom of the winnowing chamber 3 for the mixed rice removed in section C, and the brown rice conveyor 2 is disposed at the bottom of the winnowing chamber 4 for the finished brown rice.

A suction dust extractor 5 is provided at one end in the longitudinal direction of the wind selection section B, and atmospheric suction ports 6 and 6' are provided at the other end and the top surface, respectively. After passing through the wind selection chamber 4 and small rice wind selection chamber 30 for the finished brown rice and the wind selection room 3 for the fallen rice, the wind is sucked into the suction dust extractor 5. .

On the side surface of the wind sorting section B, there is a mixed rice thrower 7, which is an embodiment of the mixed rice transfer means, which communicates with the mixed rice conveyor 1, and a brown rice thrower 8, which communicates with the brown rice conveyor 2. Further, the hulling section C is connected to the rice supply hopper 10.
and a pair of right and left unrolled rice 9, and below the unrolled rice 9, a winnowing chamber 3 for the mixed rice is seen.

The two-stage rotary sorting mechanism D includes a primary sorting cylinder and a secondary sorting cylinder horizontally disposed in upper and lower stages in a box-like case 12, and both sorting cylinders are 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
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 derolling section 9, and both of these sorting cylinders are driven by belt transmission from a motor M provided in the wind selection section B. , is rotated rightward at an appropriate speed as shown by the arrow in FIG. The other end portions that are closer to each other are configured as discharge sides ``,'', respectively.

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 top-open 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. On the left side of this brown rice receiving gutter 18, that is, on the side where mixed rice is scraped up inside the primary sorting cylinder, there is a top-open mixed rice receiving gutter 21, which also has a spiral conveyor 15 inside, and is approximately parallel to the brown rice receiving gutter 18. It is located in

On the other hand, inside the secondary sorting cylinder, there is a finished brown rice receiving trough 25 with an open top surface and a built-in spiral conveyor 16.
and a top-open type small rice receiving trough 17 having a built-in spiral comb holder 27 are arranged such that the finished brown rice receiving trough 25 is located on the left side, that is, on the side for raking up brown rice in the secondary sorting cylinder.

A mixed rice supply tank 29 provided above one end of the box-shaped case 12 allows the upper end outlet of the mixed rice thrower 7 to be seen, while the lower part of the tank 29 is connected to a mixed rice receiving trough in the primary sorting barrel. 21
while communicating at the part on the discharge side,
On the supply side of the sorting cylinder in the mixed rice receiving trough 21, there is a supply port 21' for the mixed rice into the primary sorting cylinder.
The supply port 21' is provided facing downward at substantially right angles to the axis of the sorting cylinder, and the supply port 21' is located near the lower end of the fluidized bed S of mixed rice in the primary sorting cylinder and at a position lower than the fluidized bed S. Open to look into the height area.

Further, below the discharge side of the primary sorting cylinder,
The outlet on the other end side of the brown rice receiving trough 18 in the primary sorting cylinder, which is provided with a chute 20 communicating with the paddy supply hopper 10 in the hulling section C, is connected to the supply side' of the secondary sorting cylinder via the chute 31. A chute 23 that communicates with the mixed rice conveyor 1 in the wind sorting section B is provided below the discharge side of the secondary sorting cylinder, and one end of a finished brown rice receiving trough 25 in the secondary sorting cylinder. The outlet is connected to the finishing brown rice finishing chamber 4 in the wind sorting section B through the chute 24, and the outlet at one end 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 section B. It communicates with the chamber 30 via a chute (not shown).

Furthermore, the opening width dimension L along the circumferential direction of the sorting barrel in the brown rice receiving trough 18 is the same as that of the mixed rice receiving trough 2.
The opening width dimension l along the circumferential direction of the sorting cylinder in No. 1 is configured to be wider than the opening width dimension l along the circumferential direction of the sorting cylinder.

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, 28 which are rotatably operated from the outside of the box-shaped case 12. Each is provided.

When paddy is supplied to the paddy supply hopper 10 during operation, the mixed rice removed by the hulling section C has its husks removed by the wind flowing toward the suction dust extractor 5 in the wind sorting chamber 3 for the mixed rice. After that, the mixed rice enters the mixed rice conveyor 1, passes through the mixed rice thrower 7 and the mixed rice supply tank 29, and enters one end of the mixed rice receiving trough 21 in the primary sorting cylinder.
After being transferred to the supply side' in the mixed rice receiving trough 21, it is supplied to the supply side' in the primary sorting cylinder from the supply port 21'.

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 repeatedly, forming a fluidized bed S. It is transferred towards the discharge side of the primary sorting cylinder.

During this flow, the brown rice in the mixed rice is lifted up to a relatively high place while being fitted 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. In this case, since the mixed rice receiving gutter 21 is located on the side of the brown rice receiving gutter 18 that scoops up the mixed rice in the primary sorting barrel, some paddy may enter the mixed rice receiving gutter 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 to the mixed rice receiving trough 21 in the primary sorting cylinder is:
As mentioned above, as the sorting cylinder rotates, the brown rice entering the mixed rice receiving trough 21 is mixed and diluted, so the frequency of brown rice falling into the recesses 13 increases, and the sorting of brown rice becomes more difficult. Accuracy and sorting ability can be improved.

As mentioned above, 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, the amount of paddy increases as it approaches the discharge side of the primary sorting cylinder. From there, the paddy is sent to the paddy supply hopper 10 via the chute 20, where it is removed again.

In this case, whether the opening width L in the circumferential direction of the sorting cylinder in the brown rice receiving trough 18 is equal to the opening width L in the circumferential direction of the sorting cylinder in the mixed rice receiving trough 21, or the opening width in the mixed rice receiving trough 21 Width dimension l is brown rice catcher 1
When the width of the opening is larger than the opening width L of No. 8, even though the frequency of brown rice that fits into the recess 13 can be increased as described above, the brown rice that has fit into the recess 13 flows toward the mixed rice receiving gutter 21. Not only does it become impossible to increase the amount of brown rice that enters the brown rice receiving trough 18, but also the amount of brown rice contained in the paddy discharged from the discharge side of the sorting barrel increases.

On the other hand, as in the above embodiment, the opening width dimension L in the circumferential direction of the sorting barrel in the brown rice receiving trough 18
If it is configured to be larger than the opening width l in the circumferential direction of the sorting cylinder in the mixed rice receiving trough 21,
Among the brown rice that fits into the large number of recesses 13, it is possible to reduce the amount of brown rice that enters the mixed rice receiving channel 21 and increase the amount of brown rice that enters the brown rice receiving channel 18 without paddy entering the brown rice receiving channel 18, Since the amount of brown rice contained in the paddy discharged from the discharge side of the sorting barrel can be reduced, the ability to sort brown rice can be further improved.

In addition, the regulating gate valve 19 provided between the brown rice receiving gutter 18 and the mixed rice receiving gutter 21 is configured to adjust the opening width dimension L in the circumferential direction of the sorting barrel in the brown rice receiving gutter 18 and the sorting in the mixed rice receiving gutter 21. This is to simultaneously adjust the opening width dimension l in the circumferential direction of the barrel so that if one is made wider, the other becomes narrower, and if one is made narrower, the other becomes wider. The ratio of brown rice to the brown rice receiving trough 18 and the mixed rice receiving trough 21 can be adjusted to the optimum condition, depending on the quality of the rice.

In addition, when the mixed rice is dropped and supplied from the mixed rice receiving trough 21 into the sorting cylinder, the mixed rice supply port 21' into the sorting cylinder is connected to the lower end of the mixed rice fluidized bed S in the sorting cylinder. By opening the opening in the vicinity of the fluidized bed S and at a lower height relative to the fluidized bed S, the mixed rice supplied into the sorting drum is able to flow into the mixed rice fluidized bed S formed inside the sorting drum. flows into the vicinity of its lower end, and immediately forms a fluidized bed S.
On the other hand, the supplied mixed rice falls from a low position with respect to the fluidized bed S and forms a fluidized bed S due to the falling supply.
Since the spread of rice can be reduced, it is possible to reduce the scattering of the supplied mixed rice over a wide area on the inner peripheral surface of the sorting cylinder.

In addition, the brown rice receiving trough 18 in the primary sorting cylinder
The brown rice that has entered the box is sent to a secondary sorting cylinder via a chute 31, where it is sorted to remove small rice contained in the brown rice. In other words, while the brown rice supplied to the secondary sorting cylinder is being transferred to the discharge side while flowing as described above,
Brown rice is placed in finished brown rice catcher 25, and small rice is placed in small rice catcher 1.
After being sorted to fit into each section 7, the discharge side''
The finished brown rice flows out through the chute 23 to the mixed rice conveyor 1, while the finished brown rice that enters the finished brown rice receiving trough 25 enters the brown rice conveyor 2 via the chute 24, and then is taken out of the machine from 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. C...hulling section, B...wind sorting section, D...rotary sorting mechanism, I...sorting barrel, 13...concavity, I'...supply side, ''...discharge side, 18...brown rice Receiving gutter, 21
...mixed rice receiving trough, 21'...supply port, 7...mixed rice thrower as a means of transferring mixed rice, 29...
Mixed rice supply tank, 19...Adjusting gate valve, L...
...Opening width of the brown rice receiving gutter, l...Opening width of the mixed rice receiving gutter.

Claims (1)

[Scope of Claims] 1. A winnowing section for mixed rice from the hulling section is provided at the lower part of the hulling section, while a large number of recesses are formed on the inner circumferential surface on the sides of the hulling section. A rotary sorting mechanism is provided with a brown rice receiving trough with an open top surface extending in the axial direction within the rotary sorting barrel, such that one end of the sorting barrel in the rotary sorting mechanism is located on the hulling section side. one end of the sorting cylinder in the rotary sorting mechanism is configured as a discharge side, and the other end of the sorting cylinder is configured as a supply side, and the discharge side of the sorting cylinder in the rotary sorting mechanism is configured as the hulling section. In the hulling and sorting device that communicates with a paddy supply point in the rotary sorting mechanism, the sorting barrel in the rotary sorting mechanism includes the open type at a portion of the sorting barrel on the mixed rice scraping side with respect to the brown rice receiving trough. A mixed rice receiving trough is provided approximately parallel to the brown rice receiving trough, and a supply port provided on the supply side of the sorting cylinder in the mixed rice receiving trough is installed in the supply side of the sorting cylinder in a downward direction substantially perpendicular to the axis of the sorting cylinder. On the other hand,
A means for transporting the mixed rice after the rice husks have been sorted in the wind sorting section is provided in a portion of the mixed rice receiving trough located on the discharge side of the sorting barrel, and a supply port in the mixed rice receiving trough is configured to be used for sorting. 1. A rice hulling and sorting device, characterized in that it is located near the lower end of the mixed rice fluidized bed in the barrel and at a lower height. 2. The rice huller according to claim 1, wherein the opening width in the circumferential direction of the sorting barrel in the brown rice receiving trough is made larger than the opening width in the circumferential direction of the sorting barrel in the mixed rice receiving trough. Sorting device.