JPH05161851A - Air elutriation apparatus for huller - Google Patents

Abstract

PURPOSE:To provide a air elutriation apparatus which removes not only chaff but also unhulled rice so that a gravity concentration apparatus can be omitted by the combination with a huller having a high hulling ratio. CONSTITUTION:A chaff classification fan 9 is installed to effect suction (air blasting) in a downflow passage U, where the first treatment material supplied from a huller 2 flows down, to remove chaff and turn the material into the second treatment material. Another chaff classification fan 10 is installed which effects suction (air blasting) on the downstream side of the passage from the effecting area of the chaff classification fan 9 in the downflow passage U to remove chaff from the second treatment material. A circulating passage A, which returns the classification air from the discharge side of the chaff classification fan 10 to the suction side, is placed in such a manner that a part of the circulating passage A passes through the downflow passage U.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wind sorting device for removing rice husks and the like from a treated product removed by a hulling device (also called a hulling head) of a hulling machine.

[0002]

2. Description of the Related Art In a conventional hulling machine, a wind sorting device removes only hulls from a processed material supplied from the hulling device,
The processed product in which the remaining unpolished rice and unpeeled paddy were mixed was further subjected to a specific gravity sorting device (swing sorting device) to be sorted into unpolished rice and paddy.

[0003]

However, the specific gravity sorting apparatus has a structure that makes it difficult to perform a technical analysis for improving the sorting performance, and it is difficult to reduce the cost. on the other hand,
Recently, various improvements have been made to improve the removing rate of the hulling device, and a hulling device having a high removing rate (98% or more) has been realized.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a wind sorting device for removing not only rice husks but also rice husks, and the above-mentioned rice hulling device having a high removal rate. In combination with this, it is intended to omit the specific gravity sorting device.

[0005]

The first characteristic configuration of the wind sorting apparatus for a hulling machine of the present invention is to suck or blow air into the downflow path through which the first processed material supplied from the hulling machine flows down. Then, a rice husk selection fan that removes rice husks to form a second treated product, and a suction or air-blowing action to a path portion on a lower side than an operating portion of the rice husk selection fan in the flow-down path to cause the second treated material There is a paddy sorting fan excluding paddy.

The second characteristic configuration is to specify a preferable specific configuration for implementing the first characteristic configuration, and is a circulation for returning the sorting air from the discharge side of the paddy sorting fan to the suction side. The route is provided such that a part of the route passes through the downflow route.

[0007]

According to the first characteristic configuration, the treated material (first treated material) supplied from the hulling device to the wind sorting device is first generated by the rice husk sorting fan while flowing down the downflow path. Rice husks with the lowest specific gravity are removed by the sorting wind (the rest is the second treated product). After that, the unwind is removed from the second treated product by the sorting wind generated by the paddy sorting fan, and only the brown rice having the highest specific gravity remains.

According to the second characteristic configuration, the sorting air discharged from the discharge side of the paddy sorting fan is returned to the suction side of the paddy sorting fan after passing through the flow-down path of the second treated material. It That is, the sorting wind that acts on the second processed material circulates in the circulation path. Therefore, it is possible to efficiently generate the sorting wind for removing the rice that is heavier than the rice husk.

[0009]

As described above, according to the first characteristic configuration, not only the rice husks but also the rice husks can be removed, and the specific gravity sorting device can be omitted in combination with the hulling device having a high removal rate. It has become possible. Further, according to the second characteristic configuration, the paddy can be removed with a fan having a small capacity.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. The automatic hulling machine of this embodiment includes a hull tank 1 shown in FIG. 2, a hulling device 2 which is also called a hulling head, a wind sorting device 3 for wind sorting a mixture of debranched brown rice and rice husks, and wind. It comprises a brown rice bucket elevator (not shown) for discharging brown rice obtained from the sorting device 3, a bucket elevator (not shown) for returning unhulled paddy and the like to the paddy tank 1.

When the paddy shutter 4 attached to the lower part of the paddy tank 1 is opened, the paddy in the paddy tank 1 is dropped and supplied to the paddy hulling device 2 to be removed. The hulling device 2 is provided with a pair of hulling rolls 5, 6, a supply amount adjusting plate 7, and a feeding roll 8. The paddy dropped and supplied from the paddy tank 1 through the paddy shutter 4 is supplied to the gap between the paddy rolls 5 and 6 by the feeding roll 8 while the supply amount is adjusted by adjusting the inclination angle of the supply amount adjusting plate 7. Supplied.

The hulling rolls 5 and 6 are rubber rolls in which a rubber having a predetermined hardness is formed around an iron core and are rotationally driven in opposite directions at different peripheral speeds. Then, the paddy that passes between the two rolls 5 and 6 is removed by the displacement due to the difference in peripheral speed, the rubber pressing effect, and the paddy friction effect. Further, one roll 6 is provided so as to approach and separate from the other roll 5.

While the paddy is supplied from the paddy tank 1 to the gap between the rolls 5 and 6, the moving roll 6 is pressed against the fixed roll 5 by an air cylinder at a predetermined pressure. .. The gap between the two rolls 5 and 6 is maintained substantially constant in a state where the predetermined pressure and the supply amount of the paddy are balanced, but when the pass amount of the paddy increases for some reason, the roll gap follows the roll gap. It is configured to spread and maintain a constant removal performance (high removal rate).

The processed material that has passed through the hulling apparatus 2 is a mixture of debranched brown rice and rice husks, and a small amount of unhulled rice. This processed product (hereinafter referred to as the first
The processed material) is dropped and supplied to the wind sorting device 3 to be sorted. As shown in FIG. 1, the wind sorting device 3 includes a chaff sorting fan 9 and a chaff sorting fan 10.

The rice husk selection fan 9 is a suction fan which acts on the flow-down path 11 of the first processed material by suction. The sorting wind 12 generated by the rice husk sorting fan 9 is the second treated product by removing the husk having the smallest specific gravity from the first treated product. The sorting wind 13 generated by the paddy sorting fan 10 acts on a lower path portion than the acting portion of the rice husk sorting fan 9 in the downflow path 11, that is, the downflow path 14 of the second processed material, and the second processed material. The paddy with less specific gravity than brown rice is removed from.

A circulation path A for returning the sorting air 13 from the discharge side of the paddy sorting fan 10 to the suction side is provided such that a part thereof passes through the downflow passage 14. That is, the sorting air 13 discharged obliquely downward from the paddy sorting fan 10 passes through the downflow path 14 of the second processed material in a reverse direction from substantially below to above, and then passes along the partition plate 15 to the paddy sorting fan. It is reduced to the suction side of 10.

In this way, the sorting wind 13 generated by the paddy sorting fan 10 circulates in the circulation path A. The paddy removed from the second treated material by the sorting wind 13 is carried along the partition plate 15 and collected from the paddy collection device 16 equipped with a screw conveyor. Fig. 2 shows the collected paddy.
It is returned to the paddy tank 1 as shown in.

After all, only the brown rice having the highest specific gravity passes through the sorting winds 12 and 13 and reaches the brown rice tank (not shown) through the downflow route 17 to reach the brown rice bucket elevator (not shown). It is lifted and conveyed and discharged from the brown rice outlet. Therefore, the flow-down path U through which the processed material that has passed through the hulling apparatus 2 flows down the wind sorting apparatus 3 is the flow-down path 11 of the first processed material, the flow-down path 14 of the second processed material, and the flow-down path 17 of brown rice in order. It will be connected.

Other examples will be listed below. Rice husk selection fan 9 and rice husk selection fan 10
Is not limited to the configuration of the above embodiment. For example, the rice husk selection fan 9 may be configured by a blower fan instead of a suction fan, or an axial flow fan may be used instead of the Karako.

The sorting wind 13 generated by the paddy sorting fan 10 does not necessarily have to be circulated as in the above-described embodiment. An open circuit may be used like the sorting wind 12 generated by the rice husk sorting fan 9.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a wind sorting device of a huller according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a huller.

[Explanation of symbols]

 2 Rice hulling device 9 Rice hull sorting fan 10 Rice hull sorting fan A Circulation path U Downflow path

Claims (2)

[Claims] 1. A rice husk selection fan which removes rice husks and acts as a second processed material by sucking or blowing air to a downflow path (U) through which a first processed material supplied from a hulling device (2) flows ( 9) and a paddy sorting fan that removes paddy from the second processed material by sucking or blowing air toward the lower path portion of the downflow path (U) than the operating portion of the rice husk selection fan (9). (10) A wind sorting device for a huller provided with. 2. A circulation path (A) for returning the sorting air from the discharge side of the paddy sorting fan (10) to the suction side is provided such that a part of the circulation path (A) passes through the downflow path (U). The wind sorting device of the huller according to claim 1.