JPS6113875B2 - - 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.

[Conventional technology]

A rotary sorting cylinder having 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 a mixture of brown rice and paddy, and the other end has a paddy discharge section. A rotary grain sorting device in which a brown rice receiving trough extending in the axial direction of the sorting barrel is provided in the rotary sorting barrel is disclosed in Japanese Patent Application Laid-Open No. 49-24746 as a prior art. Disclosed in the official gazette.

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, forming a fluidized bed while being discharged. While moving to the 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 paddy of the mixed rice fits into the recess but remains at a lower position than the brown rice. The brown rice falling from a high position is caught in the brown rice receiving trough and taken out by taking advantage of the motion of falling from the ground. The condition differs depending on the size, moisture content, etc., so 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. Contaminants will 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.

[Problem that the invention seeks to solve]

However, in the rotary grain sorting device of the prior art mentioned above, the mixed rice after hulling is supplied to a wide part of the inner peripheral surface on the supply side at one end of the sorting barrel, so the size of the supplied mixed rice is small. The mixed rice is supplied to a part of the inner circumferential surface of the sorting cylinder where a fluidized bed of mixed rice is not formed, and the mixed rice that is fed here will not collide with the inner circumferential surface of the sorting cylinder. In order to avoid scattering over a wide area due to the rotational movement of the sorting cylinder and forming a fluidized bed immediately, the number of rice grains in the supplied mixed rice that fits into the recesses on the inner peripheral surface of the sorting cylinder is reduced. As the number of brown rice that fits into the recess decreases, the number of paddy that enters the brown rice receiving trough increases, while the number of brown rice that enters the brown rice receiving trough decreases, which improves the sorting accuracy of brown rice. Along with the decrease, the sorting ability also decreased.

The present invention provides, in this type of rotary grain sorting device, by supplying mixed rice into the sorting barrel to a portion where the supplied mixed rice immediately forms a fluidized bed. This eliminates the drawbacks of

[Means for solving problems]

For this reason, the present invention horizontally installs a rotary sorting cylinder with a large number of concave portions formed on its inner peripheral surface, one end of the rotary sorting cylinder is placed on the supply side for mixed rice of brown rice and paddy, and the other end is placed on the side for supplying mixed rice of brown rice and paddy. In a rotary grain sorting device, a brown rice receiving trough is arranged in the rotary sorting barrel and extends in the axial direction of the sorting barrel, while the supply side of the rotary sorting barrel A supply port for supplying mixed rice to the sorting cylinder is provided inside, and the supply port is configured to look into the mixed rice fluidized bed in the sorting cylinder near its lower end.

[Action/effect of the invention]

With this configuration, as the sorting cylinder rotates, the mixed rice supplied from the supply port to the supply side of the sorting cylinder is transferred to the bottom side of the inner peripheral surface of the sorting cylinder on the lower side with respect to the rotation direction of the sorting cylinder. The mixed rice flows into the vicinity of the lower end of the fluidized bed that is formed and immediately forms a fluidized bed, so this supplied mixed rice flows to a place where a fluidized bed is not formed as in the prior art. Because of the supply of water, it is not widely dispersed.

That is, according to the present invention, when the mixed rice is supplied into the rotating sorting cylinder, it is possible to prevent the supplied mixed rice from widely scattering on the inner peripheral surface of the sorting cylinder where a fluidized bed is not formed. The number of rice grains that fit into the recesses on the inner peripheral surface of the sorting barrel is reduced,
This increases the number of brown rice that fits into the recesses and reduces the overflow of the supplied mixed rice from the supply side of the sorting cylinder to the outside of the sorting cylinder.

Therefore, the number of paddy entering the brown rice receiving trough decreases while the number of brown rice increases, which not only improves the accuracy of sorting brown rice compared to the prior art, but also increases the sorting capacity. Moreover, it has the effect of significantly reducing the loss of mixed rice overflowing outside the sorting cylinder.

〔Example〕

Next, an example will be described in which the present invention is applied to a primary sorting cylinder of a two-stage rotary grain sorting device in a hulling sorter. The front view shows the hulling and sorting machine A, which includes 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. The whole is made up of 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,
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 sorter B, and atmospheric air suction ports 6 and 6' are provided at the other end and the top surface, respectively, and air is introduced into the wind sorter B through the air suction ports 6 and 6'. After passing through the wind selection chamber 4 and the small rice wind selection chamber 30 for the finishing, and the wind selection chamber 3 for the fallen rice, it is sucked into the suction dust extractor 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,
Further, the rice hulling section C includes a rice grain supply hopper 10,
It is provided with a pair of right and left unrolled rice 9, and below the unrolled rice 9 there is a winnowing chamber 3 for the scraped rice.

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, 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
A hemispherical shape with 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 device 9, and both of these sorting cylinders are driven by belt transmission from a motor M provided in the wind sorting device B. , 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 mixed rice is scraped up in the primary sorting cylinder, a supply gutter 21 which also has a spiral conveyor 15 inside and doubles as a mixed rice brown rice receiving gutter is arranged substantially parallel to the brown rice receiving gutter 18. There is. On the other hand, inside the secondary sorting cylinder, there is a spiral conveyor 16.
The finishing brown rice receiving gutter 25 having a built-in and the small rice receiving gutter 17 having a built-in spiral conveyor 27 are arranged such that the finished brown rice receiving gutter 25 is located on the left side, that is, on the brown rice scraping side in the secondary sorting cylinder. ing.

A mixed rice supply tank 29 provided above one end of the box-shaped case 12 allows the upper end outlet 7' of the mixed rice thrower 7 to be seen, while the lower part of the tank 29 is connected to the supply gutter 21 in the primary sorting cylinder. It communicates with one end of the supply gutter 21, and the supply port 21' at the other end of the supply gutter 21,
An opening is opened in the supply side' at the other end of the primary sorting cylinder so as to look into a portion of the sorting cylinder closer to the scraping-up side of the mixed rice, that is, near the lower end of the mixed rice fluidized bed S in the sorting cylinder.

In addition, the discharge side at one end of the primary sorting cylinder
The paddy supply hopper 1 in the hulling section C is located below the huller.
The outlet on the other end side of the brown rice receiving trough 18 in the primary sorting cylinder is provided with a chute 20 that communicates with A chute 23 communicating with the mixed rice conveyor 11 in the wind sorting device B is provided below the discharge side of one end of the secondary sorting cylinder, and a chute 24 is provided at one end of the finishing brown rice receiving trough 25 in the secondary sorting cylinder. It communicates with the finishing brown rice selection chamber 4 in the wind sorting device B through the wind sorting device B, and further communicates with the small grain wind sorting chamber 30 in the wind sorting device B through a chute (not shown) at one end of the small rice receiving trough 17 in the secondary sorting cylinder. to communicate.

In addition, the brown rice receiving gutter 18, the supply gutter 21 which also serves as a mixed rice receiving gutter, the finishing brown rice receiving gutter 25, and the small rice receiving gutter 17.
are provided with regulating gate valves 19, 22, 26, and 28, respectively, which are rotatably operated from the outside of the box-like case 12.

When paddy is supplied to the paddy supply hopper 10 during operation, the mixed rice removed by the huller C is turned into paddy grains by the wind flowing toward the suction dust remover 5 in the wind sorting chamber 3 for removed rice. After being removed, the mixed rice enters the mixed rice conveyor 1, and this mixed rice is sent to the supply gutter 21 in the primary sorting cylinder via the mixed rice thrower 7 and the tank 29, and then transferred to the feed gutter 2.
1 is supplied from the supply port 21' at the other end to the supply side' which is fed into the primary sorting cylinder.

The mixed rice thus supplied from the mixed rice supply port 21' of the supply gutter 21 to the supply side' in the primary sorting cylinder is raked up to a certain height by the rightward rotation of the primary sorting cylinder. It repeats the flow of falling to the bottom, forming a fluidized bed S, and is transferred towards the discharge side of the primary sorting cylinder.In this way, a fluidized bed S of mixed rice is formed in the sorting cylinder. The mixed rice supplied into the sorting cylinder after that reaches the fluidized bed S from the mixed rice supply port 21' and flows into the vicinity of the lower end thereof, thereby immediately forming a fluidized bed. Unlike when the mixed rice is supplied to a location where the fluidized bed S is not formed, the mixed rice is not scattered over a wide area.

In the fluidized bed, 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, and then falls from the recess 13, so that it can also be used as a mixed rice receiving trough. While entering both the supply gutter 21 and the brown rice receiving gutter 18, a small amount of paddy will enter the feed gutter 21. At the same time, it is sent to the supply side in the sorting cylinder for re-sorting, and the brown rice
The brown rice that has entered the box is sent to a secondary sorting cylinder via a chute 31, where it is carefully sorted.

In other words, the brown rice supplied to the supply side' in the secondary sorting cylinder flows in the same manner as described above and is transferred to the discharge side. After being sorted to enter the small rice receiving trough 17, the finished brown rice flows out from the discharge side to the mixed rice conveyor 1 via the chute 23, while the finished brown rice enters the finished brown rice receiving trough 25.
The brown rice enters the brown rice conveyor 2 via the chute 24 and is taken out of the machine from the brown rice thrower 8.

Furthermore, in the mixed rice after the brown rice is removed in the primary sorting barrel so that it enters the brown rice receiving trough 18 and the supply trough 21, the proportion of paddy increases as it goes toward the discharge side of the primary sorting barrel, and the proportion of paddy increases on the discharge side. ” is sent to the paddy supply hopper 10 via the chute 20,
Deactivation occurs again.

[Brief explanation of the drawing]

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...Concavity,'...Supply side,''...Discharge side, 18...Brown rice receiving trough, 21...
...Feeding gutter that also serves as mixed rice receiving gutter, 21'...Mixed rice supply port, S...Fluidized bed.

Claims (1)

[Claims] 1. A rotary sorting cylinder with a number of concave portions formed on its inner peripheral surface is installed horizontally, one end of the rotary sorting cylinder is placed on the supply side for the mixed rice of brown rice and paddy, and the other end is placed on the side for discharging the paddy. In a rotary grain sorting device, in which a brown rice receiving trough extending in the axial direction of the sorting barrel is arranged in the rotary sorting barrel, the brown rice receiving trough is arranged in the rotary sorting barrel on the supply side. 1. A rotary grain sorting device characterized in that a feed port for feeding mixed rice to a sorting drum is provided, and the feed port is exposed to a fluidized bed of mixed rice in the sorting drum near its lower end.