JPH0571314B2 - - Google Patents

Description

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

[Prior art] A rotary sorting cylinder with a number of concave portions formed on its inner peripheral surface is installed horizontally, one end of the 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 supplying the mixed rice of brown rice and paddy. A rotary grain sorting machine is disclosed in Japanese Patent Application Laid-Open No. 2003-120000 as a prior art, in which a brown rice receiving trough with an open top surface extending in the axial direction of the sorting barrel is disposed inside the sorting barrel. 49
It is known from Publication No.-24746.

[Problem that the invention seeks to solve]

However, in this rotary grain sorter, 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, forming a fluidized bed. While moving to the discharge side, the brown rice in the mixed rice fits into the recess and is lifted up to a relatively high position and then falls, while the paddy in the mixed rice falls from a lower position than the brown rice. Since the brown rice that falls from a high position is caught and taken out by the brown rice receiving trough using motion, the fluidized bed must have a certain thickness in order for this sorting action to be performed correctly. be.

In other words, when the thickness of the fluidized bed inside the sorting barrel is thin, a phenomenon occurs in which the mixed rice dances up inside the sorting barrel and the brown rice cannot fit into the recesses, making the sorting action unstable and the brown rice receiving As the amount of paddy that enters the gutter increases, the sorting accuracy will decrease.

However, in the prior art, the mixed rice of paddy and brown rice is fed into the supply side at one end of the sorting cylinder and discharged from the discharge side at the other end, so that when starting the sorting work, It takes a certain amount of time from the time when mixed rice is started to be fed to the supply side of the sorting cylinder until a constant fluidized bed is formed in the entire axial direction of the sorting cylinder. During this time, the sorting action in the sorting barrel is unstable, and there is a problem in that a considerable amount of paddy gets into the brown rice receiving trough, and the paddy is mixed in with the brown rice taken out from the brown rice receiving trough. At the end of the work, a considerable amount of brown rice remained in the brown rice receiving trough, which had to be scraped out by hand.

The present invention enables brown rice and paddy entering the brown rice receiving trough to be returned to the sorting barrel in an unstable state until a certain fluidized bed is formed in the sorting barrel at the beginning of the sorting operation. By making it possible to return the brown rice to the brown rice receiving trough, it is possible to prevent paddy from being mixed in the brown rice taken out from the brown rice receiving trough, and to easily discharge the remaining brown rice in the brown rice receiving trough at the end of the sorting work.

[Means for solving problems]

For this reason, the present invention horizontally installs a rotary sorting cylinder with a number of concave portions formed on its inner peripheral surface, and places one end of the sorting cylinder on the supply side of the mixed rice of brown rice and paddy, and the other end of the sorting cylinder as the side for supplying the mixed rice of brown rice and paddy. while in the sorting cylinder,
In a rotary grain sorting device comprising a top-open brown rice receiving gutter extending in the axial direction of the sorting cylinder, a mixed rice supply gutter is provided in the sorting cylinder in parallel with the brown rice receiving gutter. and the outlet of the mixed rice supply gutter,
While looking into the supply side of the sorting barrel, the bottom of the brown rice receiving gutter is provided with a drop opening extending in the longitudinal direction of the brown rice receiving gutter and opening into the mixed rice feeding gutter. The droplet is provided with a bottom valve that opens the droplet at least when the sorting operation starts and when the sorting operation ends.

[Effect]

In such a configuration, at the start of the sorting operation, the mixed rice can be supplied by opening the bottom valve for the drop opening at the bottom of the brown rice receiving trough only for a period of time until a certain fluidized bed is formed in the sorting barrel. When the mixed rice supplied from the gutter to the supply side in the sorting cylinder moves toward the discharge side of the sorting cylinder while flowing as the sorting cylinder rotates, it flows into the brown rice receiving gutter as the sorting cylinder rotates. The entering brown rice and paddy enter the mixed rice supply gutter through the drop opening at the bottom, and are fed back to the supply side in the sorting cylinder through this mixed rice feed gutter, repeating the cycle. Brown rice with paddy mixed in is never removed from the gutter.

After a certain period of time, a fluidized layer of a certain thickness is formed inside the sorting barrel, and the sorting action becomes stable and no paddy enters the brown rice receiving trough. By closing the bottom valve for the drop opening, the brown rice that has entered the brown rice receiving trough thereafter is taken out of the machine from the brown rice receiving trough.

When the sorting work is completed, by opening the bottom valve to the drop port at the bottom of the brown rice receiving gutter, all remaining brown rice in the brown rice receiving gutter is discharged from the drop port through the mixed rice supply gutter and into the sorting barrel. It will be done.

〔Effect of the invention〕

Therefore, according to the present invention, at the beginning of the sorting work, it is possible to reliably prevent paddy from being mixed into the brown rice taken out of the machine by opening the bottom valve in the brown rice receiving trough. The remaining brown rice in the brown rice receiving trough at the end of the sorting work can be released very easily by opening the bottom valve of the brown rice receiving trough, and the unstable state at the beginning of the sorting work can be released very easily. When,
Since the brown rice and paddy entering the brown rice receiving trough are circulated only within the sorting cylinder via the mixed rice supplying trough, the brown rice and paddy entering the brown rice receiving trough are temporarily removed from the sorting cylinder at the beginning of the sorting work. After taking it out,
Compared to the case where it is returned to the sorting cylinder again,
This has the effect of shortening the time it takes for the sorting action in the sorting barrel to become stable, and reducing damage to brown rice.

Further, according to the present invention, the bottom valve in the brown rice receiving trough can be used for both of the above two mechanisms, and there is no need to provide a path outside the sorting barrel to return the brown rice and paddy in the brown rice receiving trough to the sorting barrel. It also has the advantage of simple structure and miniaturization.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a drawing will be described in which an embodiment of the present invention is applied to a double-barrel type rotary sorting device for brown rice in a huller.

Figure 1 shows the overall longitudinal sectional front view of the rice huller.
This huller consists of a horizontally long box-shaped wind selection device 1, a hulling device 2 placed on the upper left side of the wind selection device 1, and a double-barrel type hulling device placed on the upper right side of the wind selection device 1. The entire system is composed of a rotary sorting device 3.

The husking device 2 includes a case 4 with a paddy supply hopper 5, a pair of husking rolls 6 provided in the case 4, and a manual opening/closing mechanism provided between the husking rolls 6 and the paddy supply hopper 5. It is composed of a shutter 7 of the type.

The wind selection device 1 includes a suction dust fan 8 at its left end, an atmospheric air intake 9 at its right side, and a cross-flow fan 10 approximately at the center. cross flow fan 10
Air channels 11 and 12 are formed to reach the suction and dust removal fan 8 through the air passages 11 and 12, and in the air path 12 from the cross-flow fan 10 to the suction and dust removal fan 8, there is a wind screening system for the mixed rice falling from the husking device 2. A wind selection section 14 for brown rice from the rotary sorting device 3 is provided in each air path 11 from the atmospheric air intake port 9 to the cross-flow fan 10, and the mixed rice wind selection section 13
At the bottom of the brown rice sorting section 14, there are a mixed rice trough 15 with a spiral conveyor and a rice trough 16 equipped with a spiral conveyor, into which the mixed rice after wind-selecting the chaff from the dehulled rice is placed. Brown rice gutter 1 with spiral conveyor
7, and a small rice gutter 18 with a spiral conveyor is provided in the middle of the air passage 11.

Both the plowing rolls 6, the suction dust exhausting fan 8, the crossflow fan 10, and the spiral conveyor in each gutter in the plowing device 2 are connected to the crossflow fan 1.
It is rotationally driven by a belt (not shown) transmission from a motor 19 provided at the lower part of the air passage 11 to 0,
Further, a bucket-type conveyor 20 is installed at one end of the mixed rice trough 15 to convey the mixed rice in the mixed rice trough 15 in a substantially vertical manner.

On the other hand, the multi-barrel type rotary sorting device 3 has first sorting barrels 21 horizontally disposed in upper and lower stages in a box-like case 23.
and a second sorting cylinder 22, both sorting cylinders 21, 22.
is rotatably supported by a pair of left and right rollers 24 and 25 protruding from the inner surface of the box-like case 23,
These rollers 24 and 25 are rotated by the motor 19 to rotate at an appropriate speed in the left direction indicated by arrow A in FIGS. 2 and 4.

The two sorting cylinders 21, 22 have one end farthest from the husking device 2 connected to an open supply side 21', 22', and the other end close to the husking device 2 connected to an open discharge side 21'', 2''.
2", and on the inner surface of each,
A large number of recesses 26 and 27 are formed, each having a size large enough to fit brown rice.

Furthermore, various types of receiving troughs such as brown rice receiving troughs are arranged in both sorting cylinders 21 and 22 so as to extend in the axial direction of the sorting cylinders. That is, inside the first sorting cylinder 21,
Brown rice receiving trough 28 with a spiral conveyor 29 inside
is installed between the face plates 30 and 31 which are detachably attached to the box-shaped case 23, and is located on the right side of the brown rice receiving trough 28, that is, the part on the side where the mixed rice is raked up inside the first sorting cylinder 21. Similarly, a mixed rice supply gutter 32 having a spiral conveyor 33 therein is mounted parallel to the brown rice receiving gutter 28 between the face plates 30 and 31. Further, inside the second sorting cylinder 22, a brown rice receiving trough 34 having a spiral conveyor 35 therein is provided with a face plate 3 which is detachably attached to the box-shaped case 23.
In addition to being installed between 6 and 37, this brown rice catcher 3
A mixed rice supply gutter 38 which also has a spiral conveyor 39 therein is located on the right side of the brown rice receiving gutter 3, that is, on the side where mixed rice is scraped up in the second sorting cylinder 22.
4 between the face plates 36 and 37.
Incidentally, the spiral conveyors 29, 33, 35, 39 in each of these receiving troughs 28, 32, 34, 38 also move the grains in the troughs as shown in FIG. It is rotatably driven to move from left to right.

Adjustment plates 40, 41 are arranged at the upper ends of the left and right side plates of the brown rice receiving troughs 28, 34 in both the sorting cylinders 21, 22 on the side where mixed rice is scraped up inside the sorting cylinders, so as to be able to swing freely in the rotational direction of the sorting cylinders. Double-sided plate 3 to move
0, 31, 36, 37 via adjustment shafts 42, 43 rotatably mounted, and also selects between the left and right side plates of the mixed rice supply troughs 32, 38 in both selection cylinders 21, 22. An adjustment plate 44 is also provided at the upper end of the side plate on the side for raking up mixed rice in the barrel.
45 is mounted between the double-sided plates 30, 31, 36, 37 via adjustment shafts 46, 47 which are rotatably mounted so as to freely swing in the rotational direction of the sorting cylinder.

Bucket type conveyor 20 for the mixed rice
A supply passage 48 is provided on the side surface of the conveyor 20 so that the mixed rice lifted by the bucket conveyor 20 flows vertically, and the supply passage 48 has both mixed rice receiving troughs in the middle and lower end thereof. Distribution supply chute 49, 50 extending into the other end of the sorting cylinder discharge side 21'', 22'' in 32, 38 is connected, while in this supply passage 48, the above-mentioned gas to the first sorting cylinder 21 is connected. A pivot 5 is attached to the lower edge of the portion where the distribution supply chute 49 opens 49' into the supply passage 48.
2 is provided, and the mixed rice flowing down the supply passage 48 is distributed approximately equally to both the distribution and supply chute 49, 50 by rotating the distribution valve 51. Sorting cylinder supply side 21' in both mixed rice supply troughs 32, 38;
Mixed rice supply ports 53 and 54 into the supply sides 21' and 22' of the sorting cylinders 21 and 22 are provided at the other end of the rice sorting cylinders 22', respectively. Further, the other end of the sorting cylinder supply side 21' of the brown rice receiving trough 28 in the first sorting cylinder 21 is connected to the sorting cylinder supply side 22' of the brown rice receiving trough 34 in the second sorting cylinder 22 via the outlet chute 55. The other end of the brown rice receiving trough 34 in the second sorting cylinder 22 on the sorting cylinder supply side 22' is connected to the outlet chute 5.
6 to the supply gutter 57 to the brown rice sorting section 14.

Annular weir plates 58, 5 projecting inward on the inner circumferential surface of the discharge side 21'' of the first sorting cylinder 21 and the inner circumferential surface of the discharge side 22'' of the second sorting cylinder 22.
9, and a paddy receiving chute 60 is provided at the lower part of the discharge side 21'' of the first sorting cylinder 21, while a second
At the end of the discharge side 22'' of the selection cylinder 22, there is a scraping cylinder 61 having a plurality of blades 62 on the inner surface.
A paddy receiving chute 63 is arranged in the upper part of the raking cylinder 61, and these paddy receiving chute 6
0 and 63 are merged into one merging gutter 64, and then communicated into the paddy supply hopper 5 in the husking device 2.

At the bottom of the brown rice receiving troughs 28, 34 in both the sorting cylinders 21, 22, a droplet 6 is provided which opens into the mixed rice supplying troughs 32, 38.
5, 66 are provided in the longitudinal direction of the brown rice receiving troughs 28, 34, and the drop ports 65, 66 are opened and closed by rotating the valve shafts 69, 70. Bottom valves 67 and 68 are provided, respectively.

In addition, the valve shaft 6 in these double bottom valves 67 and 68
9 and 70 are connected to each other via a rod 72 such that both bottom valves 67 and 68 are simultaneously opened and closed by rotating one lever 71 on the outside of the face plate 30 of the first sorting cylinder 21. There is. Furthermore, drop ports 73 and 74 having bottom valves 75 and 76 that can be opened and closed are provided at the bottoms of both of the mixed rice supply troughs 32 and 38, respectively.

During the hulling and sorting work of paddy, when paddy is fed into the paddy supply hopper 5 in the hulling device 2, the mixed rice hulled in the hulling device 2 is cleaned of rice husks in the mixed rice winding section 13 immediately below it. After that, the rice enters the mixing gutter 15, from where it is sent to the upper end of the vertical supply passage 48 by a bucket conveyor 20, and as it flows down the supply passage 48, it is divided into two distribution supply chute 49, It is distributed in such a way that the amount is approximately equal to 50.

The mixed rice thus distributed approximately equally to both distribution and supply chute 49, 50 is distributed to both sorting cylinders 21, 22.
After entering the other end of the sorting cylinder discharge side 21'', 22'' of the mixed rice supply troughs 32, 38 in the mixed rice supply troughs 32, 38, the mixed rice feed port 53,
54 to the supply side in both sorting cylinders 21 and 22.

The mixed rice supplied into both sorting cylinders 21 and 22 is
As the sorting cylinder rotates to the left, the mixed rice is scraped up to a certain height and then dropped to the bottom while being transferred toward the discharge sides 21'' and 22''.During this flow transfer, the mixed rice is The brown rice inside is lifted up to a relatively high position while being fitted into the recesses 26 and 27, and then falls, and the paddy of the mixed rice falls from a lower position than the brown rice, so that the brown rice receiving trough 28 , 34 contain only brown rice, and the mixed rice receiving troughs 32 and 38 contain brown rice and some paddy, but in this case, a certain fluidized bed is formed in both sorting barrels at the beginning of the sorting operation. In this state, the bottom valves 67, 68 for the drop openings 65, 66 at the bottom of both the brown rice receiving channels 28, 34 are opened, since paddy will also enter the brown rice receiving channels 28, 34. Therefore, all the brown rice and paddy entering the brown rice receiving troughs 28 and 34 flow out from the droplets 65 and 66 to the mixed rice supplying troughs 32 and 38, and then the mixed rice is supplied in the mixed rice supplying troughs 32 and 38. The brown rice is not taken out of the machine as the circulation is repeated where it is supplied to the supply sides 21' and 22' in the sorting cylinders 21 and 22 together with the mixed rice supplied to the gutters 32 and 38. be.

When a fluidized bed of mixed rice of a certain thickness is formed in both sorting cylinders 21 and 22, the sorting action becomes stable and only brown rice enters both brown rice receiving troughs 28 and 34. When the condition is reached, both brown rice receiving channels 2
By closing the bottom valves 67 and 69 at 8 and 34, the brown rice that enters the brown rice receiving troughs 28 and 34 thereafter is sent to the brown rice sorting section 14 via the outlet chute 55 and 56 and the supply trough 57, where it is After finishing and sorting to remove small grains, the rice is taken out of the machine by a bucket conveyor 77.

In addition, the inside of both sorting cylinders 21 and 22 is
As the mixed rice moves toward 1" and 22", on the way, the brown rice passes through the brown rice receiving troughs 28 and 3 as described above.
4 and the mixed rice receiving troughs 32, 38, as it approaches the discharge sides 21'', 22'', it becomes almost only paddy, and the mixed rice on the discharge side 21'' of the first sorting cylinder 21 is sorted into the paddy receiver The chute 60 enters the paddy supply hopper 5 in the dehulling device 2 via the confluence gutter 64, while the discharge side 22'' of the second sorting cylinder 22
The mixed rice is once lifted to the upper part by a plurality of raking blades 62 on the inner surface of the raking cylinder 61, and then enters the paddy receiving chute 63, and from this paddy receiving chute 63 via the merging gutter 64 to the husking device 2. By entering the chaff supply hopper 5, the hulling device 2 performs the hulling action again.

When the above-mentioned sorting work is completed, the bottom valves 67 and 68 in both brown rice receiving troughs 28 and 34 are opened while the rotational drive is continued for a while, thereby removing the remaining brown rice in both brown rice receiving troughs 28 and 34. All traps 6
5 and 66, the mixed rice is discharged into the sorting cylinders 21 and 22 via the mixed rice supply troughs 32 and 38.

In addition, although the above-mentioned embodiment was applied to a multi-barrel type rotary sorting device using two sorting barrels, the present invention is not limited to this, but can also be applied to a single-barrel rotary sorting device using one sorting barrel. Needless to say, the present invention can also be applied to type sorting equipment.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional front view of a rice hulling sorter, FIG. 2 is a sectional view taken from the side in FIG. 1, and FIG. FIG. 4 is an enlarged view of the main part of FIG. 2. 1... Wind sorting device, 2... Slipping device, 3... Rotary sorting device, 21, 22... Sorting cylinder, 21', 2
2'...Supply side, 21'', 22''...Discharge side, 26,
27... recess, 28, 34... brown rice catcher, 32,
38... Mixed rice supply gutter, 65, 66... Drop opening, 67, 68... Bottom valve.

Claims (1)

[Claims] 1 Rotary sorting cylinders 21 and 22 having a number of concave portions 26 and 27 formed on the inner circumferential surface are installed horizontally, and one end of the sorting cylinders is connected to the supply side 21' for mixed rice of brown rice and paddy,
22', the other end is configured on the paddy discharge side 21'', 22'', respectively, and inside the sorting cylinder there is an open-top brown rice receiving trough 28 extending in the axial direction of the sorting cylinder.
34, mixed rice supply troughs 32, 38 are provided in the sorting barrel in parallel with the brown rice receiving trough, and outlets 53, 38 of the mixed rice supply trough are provided. 54 looking into the supply side inside the sorting barrel, and a droplet 6 at the bottom of the brown rice receiving trough that opens into the mixed rice supply trough.
5 and 66 are provided in the longitudinal direction of the brown rice receiving trough, and bottom valves 67 and 68 are provided at the drop port to open the drop port at least at the time of starting the sorting work and the time of the end of the sorting work. A rotary grain sorting device characterized by: