JPH0143001Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a threshing device in which a winnowing machine is provided at the lower end of one end of the sorting chamber to blow a sorting airflow diagonally upward over the entire width or almost the entire width of the sorting chamber.

In conventional threshing equipment, the winnowing machine is composed of a fan that sucks in air from the end in the direction of the rotation axis and blows it out in the tangential direction of the rotation into the sorting chamber. Since air is sucked in from the axial end,
There was a drawback in that the distribution of the amount of air blown from the winnower into the sorting chamber in the widthwise direction of the sorting chamber was uneven, which reduced the sorting performance.

The purpose of the present invention is to overcome these conventional drawbacks.

In the threshing device according to the present invention, the winnowing machine is composed of a cross-flow fan, and a recess for forming a pressure chamber whose internal pressure is higher than that of the airflow inlet is provided on the upper surface of the airflow inlet into the sorting chamber of the winnower. It is characterized by a certain aspect.

In other words, by constructing a winnow from a cross-flow fan, the distribution of the amount of airflow blown into the sorting chamber in the width direction of the sorting chamber is made almost uniform, and the drift phenomenon is suppressed. However, if the winnowing machine is simply configured from a cross-flow fan, the blown airflow will spread upwards considerably considering the vertical width of the airflow inlet, which will reduce the flow velocity of the airflow and cause the airflow to flow inside the sorting device. The air flow is unduly obstructed by the oscillating sorting device, resulting in a decrease in airflow sorting performance. However, if the vertical width of the airflow inlet is made smaller in order to reduce the upward spread of the blown airflow, the amount of airflow blown in will be insufficient, and in this case, the airflow sorting performance will also be affected. A decrease occurs.

According to the present invention, which has the above-mentioned characteristic structure and has been made with attention to these points, the airflow is pressed downward by the pressure in the recess formed on the upper surface of the airflow inlet, and the airflow is directed upward. This allows the vertical width of the airflow inlet to be made sufficiently large to ensure a sufficient amount of airflow, while reducing the velocity of the airflow and preventing vibration sorting. It is possible to prevent the airflow from being obstructed by the device.
Combined with the uniformity of airflow distribution achieved by using a cross-flow fan, we were able to reliably achieve a remarkable improvement in airflow sorting performance.

Hereinafter, embodiments of the present invention will be described based on the drawings.

A sorting chamber 4 equipped with a swinging sorting device 3 is provided below the threshing chamber 2 in which the handling cylinder 1 is installed, and this sorting chamber 4
The threshing device is provided with a winnow 5 at the lower end of one end that blows a sorting airflow diagonally upward over the entire width of the sorting chamber 4, and the winnow 5 is composed of a cross-flow fan. A pressure chamber forming recess 5a having a higher internal pressure than the airflow inlet 5A is provided on the upper side of the airflow inlet 5A into the sorting chamber 4 of the winnower 5, and extends over the entire width of the sorting chamber 4 in the width direction. It's coming.

In the recessed portion 5a, a positive pressure, that is, a force that presses the blown air flow downward, is generated by the vortex generated as the air flow is blown.

Reference numeral 6 designates a first product collection section, 7 a second product collection section, 8 a cross-flow fan for dust removal, and 9 a thrower for returning the second product collected to the threshing room 2.

According to the above-mentioned embodiment configuration, while ensuring a sufficient vertical width of the airflow inlet portion 5A of the winch 5, the blowing airflow is pressed downward by the positive pressure of the recess 5a, so that the blowing airflow is The width can be reduced.

FIGS. 4 and 5 show another embodiment, which is
A fan 10 that forcibly blows air into the recess 5a.
It has been established.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional front view, Fig. 2 is a cross-sectional plan view of the main part, Fig. 3 is an enlarged longitudinal sectional front view of the main part, and Figs. 4 and 5 are cross-sectional planes of the main part showing another embodiment. FIG. 2 is an enlarged longitudinal sectional front view of the figure and main parts. 4... Sorting chamber, 5... Karaoke, 5A... Air flow inlet portion, 5a... Pressure chamber forming recess.

Claims (1)

[Scope of Claim for Utility Model Registration] In a threshing machine, a winnowing machine 5 is provided at the lower end of one end of the sorting chamber 4, which blows a sorting airflow diagonally upward over the entire width or almost the entire width of the sorting chamber 4. , the winnowing machine 5 is constituted by a cross-flow fan, and a pressure chamber forming recess 5a having an internal pressure higher than that of the airflow inlet part 5A is provided on the upper surface of the airflow inlet part 5A of the winnower 5 into the sorting chamber 4. A threshing device characterized by facing the The threshing device according to claim 1, wherein the recessed portion 5a generates positive pressure by a vortex generated as a result of air blowing.