JPH0118188Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a circulating grain dryer, and particularly improves dust removal performance by forming a detour air passage for dust removal in the chamber of the sorting section interposed between the grain lifting machine and the upper conveyance means. The present invention relates to a dust removal device for a circulating grain dryer which is improved and further reduced in size by suppressing the overall height.

Conventionally, this type of dust removal device was developed by Japanese Patent Application Laid-Open No.
There is one shown in No. 54064. That is, a sorting section is interposed between the funnel-shaped discharge port provided at the top of the grain lifting machine and the starting end of the upper conveying means, and the interior of this sorting section is connected to the grain lifting machine on one side. The intake pipe is connected to the exhaust pipe that communicates with the exhaust fan on the other side, and when the grains are discharged from the discharge port, they flow from the intake port to the exhaust port in the sorting chamber, that is, the grains fall. Dust is removed using a sorting wind perpendicular to the direction. However, in this system, the grains and dust released from the bucket are collected at the grain lifting machine discharge port, and both of them are mixed and fall from the discharge port opening in a layered manner. Since the sorting air flows from the perpendicular direction and the exhaust pipe is installed directly opposite the intake pipe, grains are easily discharged along with dust, and the grains fall from the exhaust port forming a thick layer. Therefore, there is a problem in that dust is not removed sufficiently and is likely to be supplied to the upper conveying means together with the grains, so that the sorting function of the sorting section cannot be fully performed.

On the other hand, what is shown in Utility Model Application Publication No. 53-45264 is
A branch piece is provided at the grain lifting machine discharge port so as to face the throwing direction by the bucket of the grain lifting machine, thereby scattering the grains widely from side to side, and solving the above-mentioned problem caused by the grains falling in layers. We are trying to However, this method still has an unsolved problem in that the presence of the branched piece increases the scattering of grains within the discharge port, making it easier for the scattered grains to be discharged from the exhaust pipe along with dust.

Furthermore, when conventional dryers are housed in a farm building, there is an inconvenience that if the height of the dryer is too large, the dryer cannot be accommodated, and in addition, the total height of the dryer has to be increased due to the dust removal equipment.

This idea was made by focusing on the problems of the conventional technology, and its purpose was to place the grain lifting machine at the same height as the dryer main body and the upper conveyance means at a level below the dryer main body. By installing a partition plate upright in the interior of the sorting section, which is interposed with a dryer, to form a detour air path for dust removal, and by connecting a dust extractor located below the height of the dryer body, it is possible to remove dust from the bucket. To provide a dust removal device for a circulating grain dryer that improves dust removal performance by immediately removing dust separated from grains along with exhaust air, suppresses the overall height of the dryer to make it smaller, and has a large dust removal function. .

Hereinafter, one embodiment of this invention will be described in detail and specifically based on the drawings.

First, the structure will be explained. In the drawings, reference numeral 2 is a circulating grain dryer. As shown in FIG. 1, the circulating grain dryer 2 includes a dryer main body 4 and a grain lifting machine 6 configured to have the same height as the dryer main body 4. The grain lifting machine 6 lifts grains from the lower part of the dryer main body 4 to the upper part. This dryer main body 4 includes, from the top, a roof section 8, a storage section 9, and a drying section 1.
0. Constructed by sequentially stacking grain collecting sections 11. A dust removal device 12 according to the present invention is installed in the upper roof portion 8 of the grain lifting machine 6.

That is, as shown in FIG.
A sorting section 18 is formed in series. The sorting section 18 is
As shown in FIGS. 1 and 4, it is located below the height of the dryer main body 4. The starting end of a screw conveyor 20, which is installed in an inclined manner and serves as an upper conveying means of the dryer, is located below the sorting section 18. As shown in FIG. 4, the screw conveyor 20 is installed in an upward slope from a starting end on the side wall 8a side on one side of the roof 8 to a terminal end on the side wall side on the other side (not shown). , the grain lifted by the grain lifting machine 6 is transported across the roof part 8 at the upper part of the dryer main body 4.

Further, in the sorting section 18, a detour chamber 24 is formed by a protruding wall 22 that protrudes toward the side wall 8a of the roof section 8 and reaches the side wall 8a, and a detour wall 23 that is continuous with the protruding wall 22. . Then, the sorting section 18
A partition plate 25 is erected in the room, facing the throwing direction of the bucket 14 of the grain lifting machine 6 and extending into the detour chamber 24, so that the first chamber 26, detour air passage 27, and second A chamber 28 is formed respectively. At the bottoms of the first chamber 26 and the second chamber 28, a first swash plate 29-1 and a second swash plate 29-2 are disposed so as to be disposed toward the center of each other, that is, to extend downward in the approach direction. ,
An opening 30 communicating with the starting end of the screw conveyor 20 is formed at the tip of the swash plates 29-1 and 29-2. A return port 40 communicating with this opening 30
is formed between the swash plate 29-2 of the second chamber 28 and the partition plate 25, that is, at the end of the swash plate 29-2. Also,
As shown in FIGS. 1 and 4, a dust extractor 34 is connected to the downstream end of the second chamber 28, which is the end of the detour air path 27, and is located below the height of the dryer main body 6.

In addition, below the starting end of the screw conveyor 20,
A discharge port 36 is formed, a discharge pipe 41 is connected to the discharge port 36, and a discharge shutter 42 is installed in the middle of the discharge pipe 41 so as to be openable and closable.

Next, the effect will be explained.

When removing dust from the dust removing device of the circulating grain dryer, firstly, when the dust remover 34 is operated, the air inside the grain lifting machine 6 is suctioned from the discharge port 16 by the suction action of the dust remover 34, and the third to As shown by the thin line arrow in FIG. 4, the air passes through the first chamber 26 in the detour chamber 24, is bent in the horizontal direction along the partition plate 25, and passes through the detour air path 27 in the detour chamber 24 and the second chamber 28. Exhausted.
This makes it possible to remove dust floating in the air.

Next, when the grains are circulated by the bucket 14 of the grain lifting machine 6 under such a condition that dust can be removed, the grains are released by the bucket 14 in the upper part of the grain lifting machine 6. It is thrown toward the opening 16, hits the partition plate 25, and scatters. Due to such releasing and scattering of the grains, dust intermixed between the grains becomes suspended, and the suspended dust rides on the intake air flow toward the dust extractor 34.

Most of the grains fall under their own weight in the first chamber 26 and are supplied to the starting end of the screw conveyor 20 through the opening 30. At the same time, the dust is separated from the grains and removed along with the exhaust through the detour air passage 27.

However, even if a part of the grain enters the detour air passage 27 at the time of levering, it will fall due to its own weight and the second
The liquid is returned to the starting end of the screw conveyor 20 through the opening 30 through the return port 40 of the chamber 28 and is supplied.

In this way, a partition plate is erected in the room of the sorting section, which is positioned below the height of the dryer main body and interposed between the grain lifting machine and the upper conveying means, which are configured at the same height as the dryer main body. By forming a detour air path for dust removal and connecting a dust extractor located below the height of the dryer body, the dust separated from the grains when released from the bucket is immediately removed with the exhaust air, improving dust removal performance. can be improved. In addition, by configuring the height of the grain lifting machine to be equal to the height of the dryer main body, and by locating the sorting section and dust extractor below the height of the dryer main body, the overall height of the dryer can be suppressed. If the farm building can be made small and can accommodate a conventional dryer,
It can be accommodated without the need to renovate farm buildings, which is advantageous in practical terms.

It goes without saying that this invention is not limited to the embodiments described above, and that various modifications can be made.
For example, in the embodiment, the dust ejector is directly connected to the end of the detour air path, but it is of course possible to connect the dust ejector to the end of the detour air path via an intake pipe.

As is clear from the above description, according to this invention, the grain lifting machine, which is constructed at the same height as the dryer main body, and the upper conveying means are interposed between the grain lifting machine and the upper conveying means, and are located below the height of the dryer main body. A partition plate is installed inside the room of the sorting section to form a horizontal detour air path for dust removal, and a dust ejector is connected to the end of this detour air path, located below the height of the dryer body, for circulation. Since it is a dust removal device for a type grain dryer, it can be constructed with a small number of parts and simple parts. Moreover, the grains thrown out by the bucket of the grain lifting machine hit the partition plate and are widely dispersed, but this dispersion falls downward, that is, in the direction in which the grains flow out. Dust with a small mass separates from the grain and floats, making it easier to be separated and discharged. And, due to the presence of the detour air path for dust removal formed by the partition plate,
Even if a part of the grains enters into this air passage, it will naturally fall within the detour air passage, be supplied to the upper conveyance means, and will not be sucked and guided to the end of the detour air passage. Therefore, only the dust is attracted and guided, and the dust is removed together with the exhaust by the dust extractor.

In addition, by configuring the height of the grain lifting machine to be equal to the height of the dryer main body, and by locating the sorting section and dust extractor below the height of the dryer main body, the overall height of the dryer can be suppressed. A farm building that can be made smaller and accommodate a conventional dryer would be practically advantageous because it would be able to accommodate the conventional dryer without requiring renovation of the farm building. As a result, it is possible to make the machine compact and improve its dust removal performance, thereby achieving the effect that ideal grain drying work can be accomplished.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a dust removal device for a circulating grain dryer according to an embodiment of the invention, FIG. 2 is a cross-sectional view of FIG. FIG. 4 is a cross-sectional view of FIG. 2. 2... Circulating grain dryer, 6... Grain frying machine, 20
... Upper conveyance means, 18 ... Sorting room, 24 ... Detour room, 14 ... Bucket, 25 ... Partition section, 27
...Detour air path for dust removal, 34...Dust extractor.

Claims (1)

[Scope of utility model registration request] In the circulating grain dryer, the height of the grain lifting machine that lifts grain from the lower part of the dryer body to the upper part is configured to be equal to the height of the dryer body, and the grain lifting machine and the grain lifting machine lift the grain from the lower part to the upper part of the dryer body. A sorting section having a detour chamber protruding laterally with respect to the bucket dumping direction of the grain lifting machine is provided between the upper conveying means for transversely transporting the grains in the upper part of the dryer body. A detour air path for dust removal is provided by installing a partition plate located below the height of the sorting section and facing the throwing direction of the bucket of the grain lifting machine and extending toward the inside of the detour chamber. 1. A dust removal device for a circulating grain dryer, characterized in that a dust removal device is connected to the terminal end of the detour air path at a position below the height of the dryer main body.