JPS6138673A - Air selector in rice huller - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a wind sorting device that performs wind sorting on mixed rice after dehulling in a huller and finishing wind sorting on brown rice sorted from the mixed rice. It is something.

[Conventional technology]

A paddy de-sexing device, a rice husk wind sorting section for the mixed rice after de-sexed by the rice husk wind sorting section, a brown rice sorting device for sorting brown rice from the mixed rice after wind selection in the rice husk wind sorting section, and the brown rice. A conventional wind sorting device in a huller, which consists of a finishing wind sorting section for unpolished rice from a sorting device, has a rice husk wind sorting section and a finishing wind sorting section, as described in, for example, Japanese Patent Application Laid-open No. 59-46142. are installed adjacent to each other, and the suction port of the suction dust exhaust fan is communicated with one side of the rice husk wind sorter, so that both the rice husk wind sorter and the finishing wind sorter are It was a wind selection process.

[Problem that the invention seeks to solve]

However, this conventional wind sorting device performs air sorting in both the rice husk wind sorting section and the finishing wind sorting section using the suction air to a single suction dust exhaust fan. Since the wind pressure is much weaker than the wind pressure of the discharge air from the suction and dust removal fan, the wind selection effect in the rice husk wind selection section is low, and the finishing wind selection section is located further upstream from the rice husk wind selection section. Therefore, in other words, since the finishing air selection section is located further away from the suction port of the suction dust exhaust fan, the air selection effect in this finishing air selection section is further reduced.
In order to improve the wind sorting effect in both the rice husk wind sorting section and the finishing wind sorting section, it is necessary to use a large suction dust fan with a significantly large suction air volume. There was a drawback that the entire wind sorting device including the sorting section was large.

The present invention eliminates these drawbacks at once.

[Means for solving problems]

Therefore, in the present invention, in addition to using a suction dust exhaust fan for wind selection in both the rice husk wind sorting section and the finishing wind sorting section, We propose that a cross-flow fan be installed and a portion of the air discharged from the cross-flow fan be forced into the finishing air selection section.

That is, the present invention provides a paddy de-sexing device, a rice husk wind sorting section for the mixed rice that has been de-sexed by the de-sexing device, and a brown rice sorting unit that sorts brown rice from the mixed rice after the wind sorting in the rice husk wind sorting section. In a rice hulling machine comprising a rice husk wind sorting device and a finishing wind sorting section for brown rice from the brown rice sorting device, an air passage is provided between one side of the rice husk wind sorting section and one side of the finishing wind sorting section. The rice husk wind sorting section and the finishing wind sorting section are connected to each other, and the suction port of the suction dust exhaust fan is shown on the other side of the rice husk wind sorting section, and the atmospheric air intake port is on the other side of the finishing wind sorting section. A cross-flow fan is disposed in an air passage communicating between the sections, with its suction side facing the finishing wind selection section and its discharge side facing the rice husk wind selection section, and the discharge side of the cross-flow fan and the finishing wind selection section. A back air path is provided between the wind selection section and the wind selection section to guide part of the air discharged from the cross-flow fan to the finishing wind selection section.

[Action/effect of the invention]

According to this configuration, air sucked into the cross-flow fan from the atmospheric air intake port on the other side blows through the finishing air selection section, and a part of the air discharged from the cross-flow fan is compressed. Since air selection in the finishing air selection section is performed by the suction air to this cross-flow fan and a part of the discharge air from the cross-flow fan, the wind speed at the finishing air selection section is different from that of the conventional finishing air. This is much stronger than when there is a single suction dust exhaust fan located far away from the rice husk sorting section across the rice husk wind sorting section.

On the other hand, the discharge air from the cross-flow fan is blown into the rice husk wind sorter with strong wind pressure, and the wind blown from the cross-flow fan into the rice husk wind sorter is immediately sucked into the rice husk wind sorter. Since the dust is sucked into the rice husk wind sorter, the wind speed in the rice husk wind sorter increases incomparably compared to the conventional case where only one suction dust exhaust fan is used. The effect can be significantly improved.

Therefore, according to the present invention, the wind selection effect of both the finishing wind selection section and the rice husk wind selection section can be improved by using the suction dust removal fan and the cross-flow fan in combination, and the suction air volume of the suction dust removal fan can be significantly increased. On the other hand, since the cross-flow fan used together with the suction dust-exhaust fan is smaller than the suction dust-exhaust fan of the same capacity, the entire air sorting device including these suction dust-exhaust fans and the cross-flow fan is not necessary. If it can be made smaller, the finish sorting of brown rice will be significantly improved, so high-quality brown rice can be obtained, and subsequent rice selection can be simplified.

Furthermore, in the present invention, by providing the cross-flow fan in the air passage that communicates the finishing wind selection section and the rice husk wind selection section, the fan case of the cross-flow fan is also used as a constituent member of the air passage. This also has the effect of simplifying the configuration of the air passage with the cross-flow fan.

〔Example〕

The present invention will be described below with reference to drawings of embodiments. FIG. 1 shows a longitudinal sectional front view of the entire rice hulling machine, and this hulling machine includes a horizontally long box-shaped wind sorting device 1, and the wind sorting device. The whole apparatus is composed of a de-aging device 2 placed on the upper left side of the rice sorter 1, and a rotary brown rice sorting device 3 placed on the upper right side of the air sorting device 1.

The de-sexing device 2 includes a case 4 with a paddy supply hopper 5;
It consists of a pair of stripping rollers 6.6 provided in the case 4, and a manually opened/closed shutter 7 provided between the stripping rolls 6.6 and the paddy supply hopper 5.

Further, the rotary brown rice sorting device 3 has a casing 8
A first sorting cylinder 9 and a second sorting cylinder 19 are installed horizontally in two stages, upper and lower.
Both sorting cylinders 9 and 10 have a large number of recesses 11 and 12 formed on their inner surfaces, each having a size large enough for brown rice to fit therein, and are driven to rotate in the direction shown by the arrow in FIG. Inside the sorting cylinder 9.10 there are a spiral conveyor (grilled brown rice receiving trough 13.14) extending in the axial direction of the sorting cylinder, and a mixed rice receiving trough 15, 16 with an acid rotary conveyor also extending in the axial direction of the sorting cylinder. are provided for each.

The wind sorting device 1 has a long box-shaped casing 17 on its side.
Inside the casing 17, there is a rice husk winding section 18 for the mixed rice that has been de-sexed by the de-sexing device 2 at a position substantially directly below the de-sexing device 2, and is located on the right side plate of the casing 17. A finishing air sorting section 20 for the brown rice from the rotary brown rice sorting device 3 is provided at a position close to the rice husk sorting device 19, and the rice husk sorting section 18 and the finishing air sorting section 20 communicate with each other via an air passage 21. .

Inside the left end of the casing 17 is a suction dust exhaust fan 22.
The suction port of the suction dust exhaust fan 22 is provided so as to look into the yJ shell wind selection section 18, while the right side plate 19 of the casing 17 is provided with an intake port 23 for atmospheric air to the finishing wind selection section 20-. Open.

In the air passage 21 that communicates the rice husk wind sorting section 18 and the finishing wind sorting section 20, a cross-flow fan 24 is installed such that its suction side faces the finishing wind sorting section 20 and its discharge side faces the rice husk wind sorting section 18. establish. Further, a discharge air path 21 extending from the discharge side of the cross-flow fan 24 to the rice husk wind selection section 18 among the air paths 21 is provided.
In this case, a back air passage 43 whose one end communicates with the finishing air selection section 20 is branched and connected so that a part of the air discharged from the cross-flow fan 24 is blown out to the finishing air selection section 20.

Further, in the lower part of the rice husk wind sorting section 1B, there is a mixed rice trough 25 with a spiral conveyor 26 into which the mixed rice after wind sorting the rice husks is placed, and a rice trough 27 with a spiral feeder 28, which are connected to the finishing wind sorting section 20. A brown rice gutter 29 with a screw conveyor 30 is provided at the lower part of each, and an Il! A small rice gutter 31 with a ll' spiral conveyor 32 is provided.

Then, during the deweighing and sorting work of paddy, when the paddy is supplied to the paddy supply hopper 5 attached to the dehulling device 2, the paddy is dehulled in the dehulling device 2 and flows down in the rice husk wind sorting section 18 directly below. At this time, the rice husks are sorted so as to be sucked into the suction dust exhaustion fan 22 by the discharge air from the cross-flow fan 24 and the suction air to the suction dust exhaustion fan 22, and the mixed rice after rice husk sorting is , the mixed rice enters the mixed rice gutter 25 and is transferred to the upper part by a brush-throat type competition + 33 set up from one end of this mixed rice gutter 25, and then transferred to the upper part by a feeding chute provided vertically on the side of this bucket type conveyor 33. When flowing down within 34,
The distribution valve 35 and distribution chute 36.37 in the supply chute 34 distribute and supply the mixed rice equally to one end of the mixed rice receiving trough 15.16 in both sorting cylinders 9.10 in the rotary brown rice sorting device 3. .

In this way, the mixed rice receiving trough 15. in both sorting cylinders 9.10.
The mixed rice uniformly distributed and supplied to one end of 16 enters the supply sides 9' and 10' in both sorting cylinders 9 and 10 from the other ends of mixed rice receiving troughs 15 and 16, and is fed through the rotation of the sorting cylinders. The rice is scraped up to a height of The brown rice is lifted up to a relatively high position while stuck in the recesses 11 and 12, and then falls down.
．． 14, while it is sorted so that only brown rice enters,
The discharge sides 9'' and 10'' of both sorting cylinders 9 and 10 contain almost only paddy, which is discharged through the chute 38 to the paddy supply humper 5 of the dehulling device 2, where the dehulling action is performed again.

The brown rice that has entered the brown rice receiving channels 13 and 14 in the two sorting cylinders 9 and 10 reaches the finishing wind sorting section 20 via the chute 39 and 40 at one end of these brown rice receiving channels 13 and 14 and the supply channel 41, Here, by the suction air to the cross-flow fan 24 and a part of the discharge air from the cross-flow fan 24, the small rice is removed so as to enter the small rice gutter 31, and then flows down to the brown rice gutter 29, and from the brown rice gutter 29. It is taken out of the machine by a bucket type conveyor 42.

In the wind sorting device 1, reference numeral 44 in the figure indicates a swinging sorting plate for sorting rice husks, 45 denotes a bypass air passage for sorting rice, and 48 denotes an air volume control valve in the cross-flow fan 24. A wire mesh 46 is stretched over the atmospheric air intake 23 so that the inside of the brown rice gutter 29 can be seen from the intake 23. Also, 47 is af
! f: A motor for rotationally driving the device 2 and the rotary brown rice sorting bag W3, as well as for rotationally driving both fans 22, 24 and various spiral conveyors in the wind sorting device 1.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a vertical front view of the entire hulling machine, FIG. 2 is a cross-sectional view taken along ■--■ in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line m-m in FIG. It is a diagram. 1...Wind sorting device, 2...Desexing device, 3...
・Rotary brown rice sorting device, 18...Rice husk wind sorting section, 20
... Finishing wind selection section, 21 ... Air path, 22 ...
・Suction dust exhaust fan, 24...Cross flow fan, 43
...Back wind path.

Claims (1)

[Claims] (1) A paddy removing device, a rice husk wind sorting section for the mixed rice that has been removed by the rice husk winding device, and a brown rice sorting device that sorts brown rice from the mixed rice that has been air-sorted in the rice husk wind sorting section. and a finishing wind sorting section for brown rice from the brown rice sorting device, wherein one side of the rice husk wind sorting section and one side of the finishing wind sorting section are communicated via an air path. The suction port of the suction dust exhaust fan is shown on the other side of the rice husk wind sorting section, and the atmospheric air intake port is shown on the other side of the finishing wind sorting section, while the rice husk wind sorting section and the finishing wind sorting section are A cross-flow fan is disposed in an air passage communicating between the cross-flow fan and the finishing wind selection section, and the discharge side of the cross-flow fan and the finishing wind selection section are arranged such that the suction side thereof faces the finishing wind selection section and the discharge side faces the rice husk wind selection section. 1. A wind sorting device for a rice huller, characterized in that a back air passage is provided between the wind sorting section and the wind sorting section for guiding a part of the air discharged from the cross-flow fan to the finishing wind sorting section.