JPS584269B2 - Dust removal device in paddy dryer - Google Patents

Description

[Detailed description of the invention] The present invention automatically discharges accumulated paddy using forced air blowing toward the discharge side, and at the same time prevents dust generated when discharging paddy from scattering around the main body of the dryer. This invention relates to a dust removal device for a rice dryer that can perform concentrated dust removal.

First, the present applicant installed multiple rows of ventilation chambers on the bottom wall of the dryer body in order to discharge the paddy filled in the dryer body in a stationary state using a discharge device consisting of a simple structure without leaving any grains. They are set up in parallel to form a paddy passage, and the wind blows out all at once in the discharge direction along the bottom wall while colliding with the side walls of the air blowing chambers installed in parallel on the lower left and right side walls of the air blowing chamber. We have developed a discharge device for a rice dryer with multiple fumaroles.

The above-mentioned discharge device succeeded in automatically discharging paddy smoothly.

By the way, when the piled up paddy is discharged by the forced air blowing action as described above, the dust mixed in the paddy is blown up from the upper opening of the dryer body due to the forced air blowing on the paddy, and the dust is blown up into the surrounding area. It was discovered that not only does this cause the workplace to become dirty, but it also has the disadvantage of significantly reducing work efficiency when workers are exposed to it.

In view of the above, the present invention horizontally installs a dust blocking body above the paddy passage to catch dust that is about to fly upward from the paddy passage, and a dust suction tube is installed near the end of the dust blocking body facing the discharge side. The dust generated when the paddy is discharged from the discharge port by the blowing action of the wind is not scattered around the main body of the dryer, but is accurately and concentratedly removed, thereby facilitating the paddy drying work. The present invention aims to provide a discharging device for a paddy dryer that can be operated hygienically and efficiently, and the configuration of the device according to the present invention will be described below with reference to a preferred embodiment shown in the accompanying drawings.

Reference numeral 1 denotes a main body of the dryer which has an open upper part and is molded into a substantially rectangular cylinder shape as a whole. On the bottom wall 2 of the main body 1, there are a plurality of rows of ventilation chambers 3 of appropriate sizes for passing through the paddy. A discharge port 5 is opened in one side wall of the wooden body 1 and is opened and closed by adjusting the elevation of an on-off valve 6.

On the lower side of the left and right side walls 3a and 3b of the above-mentioned ventilation chamber 3, there are blowholes 7 that blow out air that flows along the bottom wall 2 of the main body 1 toward the outlet side while colliding with the opposing side walls of the ventilation chamber 3 arranged in parallel.
Many have been opened.

The configuration of the blowhole 7 suitable for circulating wind in the above-mentioned flow condition is shown in detail in FIG. 2.

The blowhole 7 shown in this embodiment is constructed by forming approximately triangular cut pieces 8 at the bottoms of the left and right side walls 3a, 3b of the ventilation chamber 3. The whole of the strip 8 extends in an inclined manner into the paddy passage 4 toward the discharge port 5 side.

Therefore, if wind is blown from the fumarole hole 7 as described above, the fume air will be blown out into the paddy passage 4 in an inclined state along the cut-and-raised piece 8, and will obliquely hit the opposite side wall of the blowing chamber 3 arranged in parallel. The entire body is ejected along the wall surface 2 toward the discharge port 5 side while colliding with the state.

Above the plural rows of paddy passages 4 formed as described above, a mountain-shaped dust prevention body 10 is installed horizontally with a paddy distribution gap 9 therebetween, and the dust prevention body 10 prevents the paddy passage 4 from discharging the paddy.
The inside is turned upwards to stop the dust that is about to fly up.

The suction side of the dust suction cylinder 11 housing the suction impeller 12 is located near the end of the dust prevention body 10 facing the discharge side, so that the dust wind and fume wind that are blocked are concentrated outside the main body 1. Remove dust.

Reference numeral 13 denotes an air supply chamber attached to one side of the dryer main body 1 opposite to the discharge port 5, and the discharge side of the blower 14 is connected to this, and the generated air is transferred from the air supply chamber 13 to the air outlet. 1
5 and into each ventilation chamber 3 evenly.

16 is a discharge tube. Next, the operation of the present invention will be explained.

Now, paddy is loaded into the dryer main body 1 in a stationary state using an appropriate carrying means.

Next, the blower 14 is started and the generated wind is sent from the air supply chamber 13 through the air outlet 15 into each air blowing chamber 3.
The supplied wind is blown out into the paddy passage 4 from the blowholes 7 opened on the lower side of the left and right side walls 3a, 3b of the ventilation chamber 3, and flows upward through the filled paddy.

When this wind is flowing, a part of the wind is transferred to the dust prevention body 10.
However, since the suction impeller 12 does not rotate, the paddy flow gap 9 is cleared and the paddy is dried to a predetermined moisture content.

When the drying of the paddy is completed by the circulation action of the lice and the dried paddy is to be discharged from the discharge port 5 to the outside of the main body 1, first the on-off valve 6 is opened.
At the same time, the suction impeller 1 is raised and the discharge port 5 is opened.
Start 2.

Then, the paddy filled in the dryer main body 1 is automatically discharged from the discharge port 5 and stagnates up to the angle of repose.

In this state, undischarged paddy is deposited in a thin layer in the paddy passage 4 near the discharge port 5.

By the way, wind from the fumarole 7 is blown toward the outlet 5 side from the beginning of drying, so the wind from the fumarole 7 sequentially blows the paddy deposited on the bottom wall 2 of the paddy passage 4 toward the outlet 5 side. At the same time as the discharging work is carried out, in which the paddy is jetted toward the paddy and discharged from the discharging port 5, the light-specific-gravity dust mixed into the paddy during the jetting and discharging work described above flies upward in the paddy passage 4.

However, a dust prevention body 10 is installed horizontally above the paddy passage 4, and the exhaust side end of the dust prevention body 10 is exposed to the suction side of a dust suction tube 11 that performs an air intake function, so that air can be actively taken in. Therefore, the dust that flies upward in the paddy passage 4 is once caught by the dust prevention body 10, and then transferred along the dust prevention body 10 by the suction action from the dust suction tube 10, and is first removed from the blowhole 7. The dust merges with the blowing wind and is concentratedly discharged to the outside of the main body 1 by the suction impeller 12.

Therefore, even when the paddy is automatically discharged by the blowing wind, it is possible to prevent dust from scattering to the surroundings and perform sanitary discharge work.

In short, since the present invention has the above-described configuration, if a large amount of paddy is filled in the dryer body 1 in a stationary state and the discharge port 5 is closed, the left and right side walls 3a of the ventilation chamber 3 are
, 3b can be dried to a predetermined moisture content by the flow of air blowing out from the blow holes 7 opened on the lower side and the upper side, and when the discharge port 5 is opened and the suction impeller 12 is started. Due to the natural discharge action due to the angle of repose of the accumulated paddy and the blowing action of the wind flowing from the fumarole 7 toward the discharge side, the paddy accumulated on the paddy passage 4 can be discharged without leaving a single grain. The dust that is about to fly upward from the paddy passage 4 due to the jetting action is caught by the dust prevention body 10,
This causes the dust to be transferred to the discharge side by the suction action from the dust suction pipe 11, and the dust can be concentratedly discharged out of the main body 1 along with the fume air.

Therefore, according to the device of the present invention, even during work in which paddy is automatically discharged by the blowing action of wind, it is possible to prevent any dust from scattering around the dryer main body 1. This has the effect of making it possible to operate the system hygienically and efficiently.

Note that by arranging the opening positions of the blowholes 7 so as to be offset from each side wall, the above-mentioned blowing action can be made more effective, and the same effect can be obtained even if the dust exhaust pipe 11 is installed at the position indicated by the chain line in FIG. play.

Although it is desirable to install the same number of dust suction cylinders 11 as the number of paddy passages 4, it is also possible to install only one dust suction cylinder 11 if the suction force is strong.

[Brief explanation of the drawing]

The drawings show one embodiment of the device of the present invention.
The figure is a longitudinal sectional front view with a portion cut away, and FIG. 2 is a longitudinal sectional side view with a portion cut away. 1...Dryer main body, 2...Bottom wall, 3...Blower chamber,
4... paddy passage, 5... discharge port, 7... blowhole, 1
0...Dust prevention body, 11...Dust suction cylinder.

Claims (1)

[Claims] 1 Multiple rows of ventilation chambers are installed in parallel at the bottom of the dryer body so as to form a paddy passage, and the lower sides of the left and right side walls of the ventilation chambers are used to direct the paddy accumulated on the paddy passage to the discharge side. In a device having a large number of blowholes, a dust blocking body is installed horizontally above the paddy passage to catch dust flying upward from the paddy passage, and a dust blocking body facing the discharge side is installed horizontally. A dust removal device for a rice grain dryer, characterized in that one end of a dust suction tube is exposed near the terminal end.