JPS6320291Y2 - - Google Patents

Description

[Detailed description of the invention] Conventionally, a blower fan is provided below the handling room, and a suction fan with approximately the same capacity as the above-mentioned blower fan is installed on the side of the dust evacuation chamber, and the rear wall of the dust evacuation chamber is connected to the back wall. A threshing machine is already known which is sealed and discharges straw waste by a suction fan while balancing the blowing force of the blower fan with the suction force of the suction fan. However, this method does not cause problems with dust removal when threshing well-dried grain culms, but when threshing wet grain culms, not only does it generate a large amount of straw waste, but it also has a high specific gravity and easily sticks, so it is difficult to remove dust. There was a drawback that the dust action became insufficient and straw debris accumulated on the rack of the swinging sorter facing below the suction fan, causing it to become clogged.

In order to solve this problem, a dust exhaust port is installed on the rear wall of the dust exhaust chamber, and light straw waste is discharged from the suction fan to the outside of the machine, and long and heavy straw waste is easily transferred to the rear and then inserted into the dust exhaust port. It was proposed that the exhaust would be discharged from the rear.

However, in the method of removing dust from the suction fan and dust exhaust port, a characteristic of the suction fan is that it does not suck outside immediately before the suction port, but as it moves away from the suction port, the suction range expands vertically and horizontally and gradually becomes weaker. , the suction fan is the pressure air a4 on the opposite side.
As shown in Fig. 5, the dust exhaust port is sucked in as shown by arrow a2, and the suction air a from the dust exhaust chamber is sucked by that amount.
1, a3 was weakened, and there was a drawback that the air selection performance in the dust removal chamber was reduced.

This invention aims to improve the above-mentioned drawbacks, and includes a blower fan installed at the front lower part of the handling chamber, a dust exhaust port at the rear of the dust extraction chamber, and a suction port at the side of the dust extraction chamber. In a threshing machine equipped with a fan and a swinging sorter installed from below the handling chamber toward the dust exhaust port, a suction passage is separated from the dust exhaust chamber in a portion facing the suction fan and partitioned with a partition plate. It is characterized in that a straw waste passage as narrow as possible is provided between the lower end of the partition plate and the swinging sorter.

The embodiment shown in the drawings will be explained below.1
is a handling room in which the handling cylinder 2 is mounted on an axis, and the receiving net 3 is
A blower fan 4 is provided at the front lower part of the chamber, and a suction fan 6 is provided at the side wall of the dust removal chamber 5.

Reference numeral 7 denotes a swinging sorting body that extends from the bottom of the receiving net 3 to the dust exhaust port 8 provided at the rear of the dust exhaust chamber 5, and includes a transfer plate 9.
, a sorting net 10 , and a sheave 12 with a stroke rack 11 , and the sorting air from the blower fan 4 flows through the sorting net 10 from between the transfer plate 9 and the first receiving gutter 13 . The air is divided into an air path A and a sub-selection air path B that blows through the sheave 12 from between the first receiving gutter 13 and the bottom plate 14 via the second receiving gutter 15. Further, the suction fan 6 sucks the inside of the dust removal chamber 5.

In the upper part of the dust evacuation chamber 5 facing the suction port 6a of the suction fan 6, there is a mediastinal plate 17a with a suction passage 16 in front of the suction port 6a;
A diaphragm 17 is provided, which consists of a transverse diaphragm 17b extending from 7a to the opposite machine wall and having an inverted V-shape in side view. The front edge of the partition plate 17b is continuous with the front wall 19 hanging down from the top plate 18 toward the front of the suction port 6a of the suction fan 6, and the front edge of the partition plate 17b is continuous with the front wall 19 hanging down from the top plate 18 toward the front of the suction port 6a of the suction fan 6. is formed into a triangular slope 17c.

Also, between the partition plate 17 and the straw rack 11 is a straw waste passage 20 as narrow as possible through which the straw waste can be carried out.
It is composed of

In the above-mentioned device, the leakage from the receiving net 3 and the discharge from the dust inlet 21 are transferred to the sorting net 10 by the transfer plate 9, and are sieved while being air-sorted, and the leaked grains are the most It falls into the receiving gutter 13 and the sorting net 10
The second material and straw waste left on the top are removed from the straw rack 11.
The second material that has leaked out is transferred to the top and is sorted through a sieve while being screened, and falls into the second receiving gutter 15, and when it is transferred to one side of the machine, the second thrower 21 is moved to the transfer plate 9. reduce above.

The suction fan 6 sucks the dust exhaust chamber 5 through its suction port 6a, and the dust exhaust port 8 facing the suction port 6a is covered by a partition plate 17 across the suction passage. As shown in FIGS. 2 and 3, the entire dust removal chamber 5 in front of the partition plate 17 is suctioned, and the straw waste in the dust removal chamber 5 is discharged to the outside of the machine.

Since the present invention is configured as described above, the straw waste on the oscillating sorter can be reliably carried out from the dust exhaust port, but the upper part of the dust exhaust port on the opposite side of the suction passage is provided with a partition plate. Since the suction fan is covered with dust, there is almost no suction at the dust exhaust port, and the dust exhaust chamber is strongly suctioned across its entire width. In addition, even if a large amount of straw waste that easily adheres is generated, it is reliably suctioned and discharged to the outside of the machine, significantly improving wind sorting performance and preventing straw waste from being placed on the oscillating sorter on the side away from the suction fan. can prevent clogging.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention,
Fig. 1 is a longitudinal sectional view of the threshing device, Fig. 2 is a longitudinal sectional view of the main parts, Fig. 3 is a sectional view taken along line A-A in Fig. 2, Fig. 4 is a perspective view of the same, and Fig. 5 is a conventional example. Longitudinal cross-sectional view, No. 6
The figure is a sectional view taken along line BB in FIG. 4...Blower fan, 6...Suction fan, 7...
Oscillating sorter, 8... dust exhaust port, 16... suction passage,
17... Partition board.

Claims (1)

[Scope of utility model registration request] A ventilation fan is provided at the front lower part of the handling chamber, a dust exhaust port is installed at the rear of the dust evacuation chamber, and a suction fan is installed at the side of the dust evacuation chamber. In a threshing machine equipped with a dynamic sorting body, a suction passage is separated from a part of the dust evacuation chamber facing the suction fan by a partition plate, and as much space as possible is provided between the lower end of the partition plate and the swing sorting body. A dust evacuation device for a threshing machine, characterized by having a narrow straw waste passage.