JPH09318262A - Rough sorter for grain dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a satisfactory roughly sorting effect by connecting a cyclone type sorting chamber having a blower to a discharge pipe, sorting grain and impurities from the grain including the impurities, exhausting the impurities from the dryer through the blower and returning the grain to a circulating path. SOLUTION: Light impurities K are guided to a sorting chamber 20, then, sucked to a case 28 as shown by arrows through the opening 28a of the case 28 of a blower 21 from an opening 23 on the upper surface of the sorting chamber 20 by the blower 21, and exhausted outside from an exhaust port 31 as shown by an arrow. On the other hand, grain W guided to the sorting chamber 20 spirally turns and flows down along the inner peripheral wall of the sorting chamber 20 as shown by an arrow without being sucked by the blower 21 because of its tare weight, and is dropped into a chute 32 from the lower end opening 22 of the sorting chamber 20. The grain W is droped along the inclined surface 34 of the chute 32 as shown by an arrow and returned to a discharge pipe 13 from a return port 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grain dryer rough-sorting machine for removing contaminants in grains circulated by a dryer body, an elevator, and the like.

[0002]

2. Description of the Related Art Generally, a circulation type grain dryer has a storage section formed in an upper portion of a substantially box-shaped dryer main body, a drying section below the storage section, and a circulation mechanism section below the storage section. And the grains collected in the circulation mechanism part are circulated by being conveyed by an elevator provided on the outside of the dryer main body and an upper conveyance mechanism provided above the storage part, and dried during this circulation. The grains passing through the department are exposed to the hot air generated by the burner to dry them.

In order to remove contaminants such as dust, straw dust, rice husks, shiina, etc. contained in circulated grains, conventionally, for example, an air exhaust device disclosed in Japanese Patent Laid-Open No. 59-77287 or A dust removing device disclosed in Japanese Utility Model Laid-Open No. 60-123591 is known.

In the former air exhaust device, an air exhaust device for collecting dust is connected to the discharge port of the elevator, and a cyclone collector is connected to this air exhaust device through a wind pipe, and the exhaust port and grain provided in the collector are connected. The air supply port provided in the tank (reservoir) is connected by a wind pipe. In the latter dust collector, a dust collector is installed in the grain transport path from the elevator to the upper transport mechanism, and the dust outlet of this dust collector is installed next to the drying chamber via the dust collector. It is connected to the wind chamber.

[0005]

However, in the air exhaust device and the dust exhaust device, it is difficult to reliably discharge only the contaminants to the outside, and it is difficult to obtain a sufficient rough selection effect. There was a problem.

That is, in the former exhaust device, the exhaust device is connected to the discharge port of the elevator, and the cyclone collector is connected to this exhaust device. Contaminants are sucked in by an air blower, which is sorted by the collector into lightweight contaminants such as straw dust and rice husks and clean air.The contaminants are stored in a dust collection box provided below the collector, and the clean air is collected in the collector. It is returned to the inside of the dryer main body through the wind pipe provided above. Therefore, for example, if the suction force of the exhaust fan is strong, the grains (size adjustment) will be sucked together with the contaminants, and the grains will be stored in the dust collection box together with the contaminants. If the suction force is weak, contaminants will not be sucked into the collector, resulting in poor dust removal efficiency.

Further, in the latter dust removing device, since the dust collecting device directly sucks the contaminants from the conveying path in the upper part of the dryer main body, the grain being conveyed is not covered by the dust removing device. As the effective range becomes narrower and the time becomes shorter, the dust extraction efficiency becomes inferior.Therefore, if the suction force of the dust extractor is increased in order to improve the dust extraction efficiency, even the grain, as well as the former exhaust device, It will be sucked and discharged to the outside.

[0008] As described above, in the air exhaust device and the dust exhaust device described above, a technique is used in which the foreign substances contained in the circulating grain are targeted and the only foreign substance is sucked and removed, and the grain is not sucked as much as possible. Since it has been developed and used based on the idea, it becomes extremely difficult to adjust the suction force by, for example, a blower or a dust collector. In particular, the type and amount of impurities contained in grains differ depending on, for example, the state of the grain (cutting conditions, weather conditions at the time of cutting, grain pattern, etc.), so that sufficient dust removal efficiency can always be obtained. It is actually very difficult to adjust the suction force of a wind blower or the like, and it is difficult to obtain a sufficient rough selection effect.

Therefore, according to the present invention, a part of the circulating grain containing the contaminants is positively guided into the sorting chamber to sort the contaminants and the grain, and then the contaminants are discharged to the outside to circulate the grain. It was developed on the basis of a new idea that has never existed before that only foreign substances can be discharged to the outside by returning to
An object of the present invention is to provide a coarse dryer for a grain dryer, in which grains are not discharged out of the circulation route together with impurities and a sufficient roughening effect is obtained.

[0010]

In order to achieve such an object, a coarse dryer for a grain dryer according to claim 1 is provided with a storage unit, a drying unit and a circulation mechanism unit inside the dryer main body, and a unit outside the main body of the dryer. In a grain dryer that has a grain circulation path that reaches the storage unit via an elevator provided in the elevator and an upper transport mechanism provided above the storage unit, a discharge pipe is provided in a connecting portion with the upper transport mechanism of the elevator, and a discharge pipe is provided. Cyclone-type sorting chamber with a blower is connected to, grain containing contaminants discharged from the upper part of the elevator into the discharge pipe is guided into the sorting chamber to sort grain and contaminants, and the contaminants are passed through the blower. The grain is returned to the circulation route of the grain dryer while being discharged outside the grain dryer.

According to this coarse dryer for grain dryer, the grains exposed by the elevator which constitutes the circulation route of the grain dryer are
It is discharged at a predetermined speed into the discharge pipe above the elevator,
It is transported to the storage unit by the upper transport mechanism. Grains containing contaminants discharged into this discharge pipe are partly guided together with the contaminants into the cyclone type sorting chamber by the suction force by the operation of the blower and the grains and contaminants are sorted in this sorting chamber. It

Then, the light-weight contaminants are sucked by the blower from the upper part of the sorting chamber, and discharged to the outside of the grain dryer through the discharge port provided in the blower. The grain guided into the sorting chamber flows down while swirling in the sorting chamber due to its own weight and is returned to the circulation path by being supplied into, for example, the discharge pipe. By repeating the circulation of the grain through the circulation route, the contaminants in the grain can be reliably separated from the grain (size adjustment), and only the contaminants are discharged to the outside, and the grain can be discharged to the outside (outside the circulation route). It is possible to obtain a sufficient rough selection effect.

Further, in the coarse dryer for grain dryer according to the second aspect, the sorting chamber guides the grain including the contaminants from the guide port communicating with the opening on the upper side surface of the discharge pipe, and selects the sorted grain. Through the discharge member connected to the lower end opening of the sorting chamber,
The grain is returned to the circulation path by supplying it into the discharge pipe from a return port provided at the lower portion of the side surface of the discharge pipe.

According to the coarse dryer for grain dryers, the contaminants discharged from the elevator at a predetermined speed and floating are contained in the sorting chamber at a high speed through the opening on the upper side of the discharge pipe and the guide port of the sorting chamber. After being guided, it is discharged to the outside of the grain dryer by the blower above the sorting chamber. Grains that are guided and sorted into the sorting chamber together with the contaminants are reliably returned from the lower end opening of the sorting chamber to the inside of the discharge pipe (circulation path) via the discharge member and the return port at the lower side surface of the discharge pipe.

Further, in the coarse dryer for grain dryers according to a third aspect of the present invention, the sorting chamber is connected to the discharge pipe so that the sorting chamber is located above the upper transport mechanism, and the guide port is connected to the opening on the upper side surface of the discharge pipe. It is characterized in that the grain containing impurities is guided and the grain is returned to the circulation path by supplying the sorted grain from the lower end opening of the sorting chamber to the upper transport mechanism.

[0016] According to this coarse dryer for grain dryer, the grain guided and sorted into the sorting chamber together with the foreign matters can be returned to the upper transport mechanism (circulation path) located immediately below the lower end opening of the sorting chamber. Yes, for example, the length of the grain return path can be minimized.

According to a fourth aspect of the present invention, in the coarse dryer for grain dryers, a guide plate is provided in the guide port of the sorting chamber in a direction substantially tangential to the peripheral wall of the sorting chamber, and the tip of the guide plate is discharged. It is characterized in that the grain containing contaminants in the discharge pipe is guided into the sorting chamber by projecting into the pipe by a predetermined length.

According to this coarse dryer for grain dryer, the guide plate is provided so as to discharge from the guide port of the sorting chamber into the discharge pipe, and the grain containing impurities in the discharge pipe is substantially tangential to the peripheral wall of the sorting chamber. The amount of grain that is guided into the sorting chamber along the direction and is supplied into the sorting chamber is substantially equalized.

Further, in the coarse dryer for grain dryer according to a fifth aspect of the invention, the position of the tip of the guide plate in the discharge pipe is adjustable. According to this coarse dryer for grain dryer, the amount of grain guided into the sorting chamber is adjusted according to the suction force of the blower by changing the position of the tip that is discharging into the discharge pipe of the guide plate. it can.

[0020]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 6 show an embodiment of a grain dryer using a rough sorter according to the present invention, FIG. 1 is a perspective view thereof, FIG. 2 is an internal structure view thereof, and FIG. 3 is an enlarged side view of a main part. Fig. 4, Fig. 4 is a sectional view taken along the line AA of Fig. 3, Fig. 5 is a sectional view taken along the line BB of Fig. 4, and Fig. 6 is a schematic diagram showing the flow of grain.

1 and 2, the grain dryer 1 is
A substantially box-shaped dryer main body 2 including a storage unit 3, a drying unit 4, and a circulation mechanism unit 5, an elevator 6 standing upright outside the dryer main body 2, for example, on the front left side, and the vicinity of the upper portion of the elevator 6. And the upper screw 8 (upper transfer mechanism) provided on the top plate portion above the storage portion 3 of the dryer main body 2.
Etc.

The elevator 6 has a rotatable bucket belt 9 in which buckets 9a are fixed at predetermined intervals, and the bucket belt 9 rotates in the direction of arrow A in FIG. Due to the rotation of the bucket belt 9, the grain W collected by the rotary valve 11 in the lower portion of the circulation mechanism unit 5 and transferred to the lower portion of the elevator 6 by the lower screw 12 is scooped up by the bucket 9a and reaches the upper portion of the elevator 6. It is exposed.

A discharge pipe 13 is connected to the upper portion of the elevator 6. That is, as shown in FIGS. 3 to 5, an opening 14 (see FIG. 5) is provided in the upper portion of the right side surface 6a of the elevator 6, and a substantially box-shaped discharge pipe 13 is attached to the opening 14 to A discharge pipe 13 is connected to the elevator 6. The left side surface 13a of the discharge pipe 13 is provided with an opening 15 (see FIG. 5) communicating with the opening 14 of the elevator 6, and as shown in FIG. 4, an opening 16 is provided above the front side surface 13b.
However, a return port 17 is provided below the front side surface 13b, and a discharge port 18 is provided at the right end of the bottom surface 13e.

The roughing machine 7 has a substantially cylindrical sorting chamber 20 whose lower portion is formed, for example, in a conical shape with an angle α = 45 degrees (see FIG. 4), and a blower 2 provided above the sorting chamber 20.
One. The sorting chamber 20 has an opening 22 at its lower end.
However, the opening 23 is provided on the upper surface, and the guide port 24 is provided on the upper portion of the peripheral wall. And the sorting room 20
With the guide port 24 corresponding to the opening 16, as shown in FIG. 3 and FIG.
It is fixed to. As shown in FIG. 5, guide plates 26 and 27 are provided at the guide port 24 of the sorting chamber 20 and the opening 16 of the discharge pipe 13.

One guide plate 26 is formed in a flat plate shape, and has a tangent line L at the end of the guide port 24 on the peripheral wall of the sorting chamber 20.
The distal end portion 26a is fixed in the discharge pipe 13 so as to project a predetermined length in the direction. Further, the other guide plate 27 is provided with a protruding portion 27a that slightly protrudes into the sorting chamber 20 along the substantially tangential line L direction on the sorting chamber 20 side, and has a triangular convex portion 27b on the discharge pipe 13 side. Is provided. The guide plates 26, 27 (especially the guide plate 2
By 6), the grain W containing the contaminant k in the discharge pipe 13 is guided into the sorting chamber 20.

As shown in FIG. 4, the blower 21 has rotary blades 29 rotatably arranged in a case 28 and a blower motor 30 fixed to the upper surface of the case 28. An opening 28a is provided on the lower surface of the case 28, and the opening 28a communicates with the opening 23 of the sorting chamber 20.
A discharge port 31 is provided on the outer surface of the case 28.
Then, in the blower 21, the rotation of the blower motor 30 causes the rotary blades 29 connected to the rotary shaft 30a to rotate, so that the blower 21 passes from the inside of the sorting chamber 20 into the case 28, and from the outlet 31 to the outside of the blower 21. Creates a stream of air that escapes.

Further, between the opening 22 at the lower end of the sorting chamber 20 and the return port 17 of the discharge pipe 13, a chute 3 as a discharging member is provided.
2 are provided. This chute 32 has a hole 33 formed on the upper surface into which the lower end of the sorting chamber 20 is inserted, and
The bottom surface is, for example, an inclined surface 34 with an inclination angle β = 35 degrees, and its lower end is connected to the lower edge of the return port 17 of the discharge pipe 13. The grain W sorted in the sorting chamber 20 by the chute 32 is returned to the discharge pipe 13.

On the other hand, in the upper screw 8 connected to the discharge port 18 of the discharge pipe 13, a spiral screw 36 is rotatably provided by a bearing 37 etc. in a trough-shaped case 35, and the upstream side of the screw 36 is It is located below the discharge port 18 of the discharge pipe 13, and the other end thereof extends to a substantially intermediate position in the front-rear direction of the dryer main body 2. And screw 3
A dispersion plate 38 (see FIGS. 1 and 2) is rotatably arranged at the lower part of the other end side of 6.

As shown in FIGS. 1 and 2, the grain dryer 1 is provided with a burner 40 for generating hot air near the center of the front surface of the drying section 4, and the burner 4 is also provided.
An operation panel 41 for operating various operations of the grain dryer 1 is provided on the right side of 0. A blower 43 that sucks hot air from the burner 40 and discharges the hot air from the burner 40 by the rotation of the blower motor 42 is provided on the back side of the drying unit 4.

The grain dryer 1 is provided with a circulation path including a storage unit 3, a drying unit 4, a circulation mechanism unit 5 including a lower screw 12, an elevator 6 including a discharge pipe 13, and an upper screw 8. The grain W is dried in the drying unit 4 while circulating through this circulation path. That is, as shown in FIG. 2, a hot air passage 44 and an exhaust air passage 45 are provided in the drying unit 4, and the hot air supplied from the burner 40 into the hot air passage 44 passes between the grains W as indicated by an arrow B. By passing through and passing through the exhaust path 45 connected to the blower 43, the grain W passing through the inside of the drying unit 4 is dried by being blown with hot air.

Next, the roughing machine 7 in the grain dryer 1 is used.
An example of the operation will be described with reference to FIGS. First, while the blower motor 30 is rotated to operate the rough sorter 7, the grain W scooped up by the bucket 9a of the elevator 6 and lifted to the upper portion of the elevator 6 has the bucket 9a and the bucket belt 9 at the uppermost end. It is discharged into the discharge pipe 13 at a predetermined speed by a centrifugal force or the like that acts when the portion is rotated.

Grains W containing the contaminants k discharged into the discharge pipe 13 are discharged from the discharge pipe 13 as shown in FIGS. 4 and 5.
The foreign matter k and a part of the grain W are guided to the inside of the sorting chamber 20 as indicated by an arrow C by the momentum released from the chamber and the suction force from the opening 16 into the sorting chamber 20 due to the operation of the blower 21. The other grains W that have not been guided into the sorting chamber 20 flow through the discharge pipe 13 as indicated by arrow D and are supplied from the discharge port 18 into the upper screw 8.

At this time, since the grain W guided into the sorting chamber 20 is guided by the guide plate 26, the amount of the guided grain W can be reduced by appropriately setting the position of the tip 26a. The air flow (spiral swirl) in the sorting chamber 20 is smoothed by the protrusions 27a of the guide plate 27, and the protrusions 27b of the guide plate 27 allow the guide plate 26 to be adjusted. Since the reduction of induction force (turbulence of air flow, etc.) due to
The grain W is guided into the sorting chamber 20 more smoothly.

Then, the grain W containing the contaminant k introduced into the sorting chamber 20 is sorted as follows. That is, the foreign matter k having a light weight is guided into the sorting chamber 20 and then the blower 21 opens the opening 23 on the upper surface of the sorting chamber 20.
4 is sucked into the case 28 through the opening 28a of the case 28 of the blower 21 as shown by the arrow E in FIG. 4, and is discharged to the outside from the discharge port 31 as shown by the arrow F. Blower 2
A flexible duct 46, for example, is connected to the discharge port 31 of No. 1 through which a foreign matter k is placed in an appropriate position outside the grain dryer 1 in a dust collection box (not shown). ) Etc.

On the other hand, the grain W guided into the sorting room 20
Does not get sucked by the blower 21 due to its own weight and swirls down along the inner peripheral wall of the sorting chamber 20 as shown by the arrow T, and falls into the chute 32 from the lower end opening 22 of the sorting chamber 20. To do. The grain W slides down along the inclined surface 34 of the chute 32 as shown by the arrow J,
It is returned from the return port 17 of the discharge pipe 13 into the discharge pipe 13, and is supplied from the discharge port 18 of the discharge pipe 13 into the upper screw 8.

That is, in the grain W containing the foreign matter k guided into the sorting chamber 20, the lighter foreign matter k is sucked upward against the gravity, and the heavy grain W moves downward due to its weight. The foreign matter k and the grain W are sorted by flowing down to. The grain W supplied into the upper screw 8 is transferred in the direction of the arrow by the rotating screw 36, and is distributed from the other end of the upper screw 8 to the dispersion plate 38.
It drops up and is dispersed and accommodated in the storage part 3 by the rotation of the dispersion plate 38.

Then, the grain W is circulating in the circulation path of the grain dryer 1, that is, after flowing down from the storage section 3 to the drying section 4 and dried with hot air by the burner 40, the circulation mechanism section 5 is again provided.
Contaminants in grain W are coarsely selected by the coarse selection device 7 in the discharge pipe 13 during the circulation of being lifted up by the elevator 6 via the elevator 6 and returning to the storage part 3 via the discharge pipe 13 and the upper screw 8. k will be removed. Note that FIG. 6 schematically shows the flow of the grain W described above. The solid arrow in FIG. 6 indicates the flow of the grain W guided into the sorting chamber 20, and the double-dotted chain arrow indicates the sorting chamber 20. The flow of the grain W which has not been guided inside is shown, and the reference numerals of the arrows correspond to the reference numerals of FIGS. 4 and 5, respectively.

As described above, according to the coarse selector 7 of the grain dryer 1 of the above-described embodiment, the discharge pipe 13 attached to the upper part of the elevator 6 is provided with the blower 21 at the upper opening 23 of the sorting chamber 20. And the lower end opening 2 of the sorting chamber 20
2 communicates with the return port 17 in the lower portion of the discharge pipe 13 through the chute 32, so that the foreign matter k discharged into the discharge pipe 13
And a part of the grain W is guided by the suction force of the blower 21 into the sorting chamber 20 for sorting, and the contaminant k is sucked upward and discharged from the discharge port 31 of the blower 20 to the outside. It can be made to flow downward and returned to the discharge pipe 13 from the lower end opening 22 of the sorting chamber 20 via the chute 32.

As a result, the grain W guided and sorted in the sorting chamber 20 can be surely returned to the discharge pipe 13 which is the circulation route of the grain W without being discharged to the outside, and the contaminant k Only this can be discharged to the outside (outside the grain dryer 1), and a sufficient rough selection effect can be obtained.

In particular, since the grain W guided by the guide plates 26 and 27 into the sorting chamber 20 is partly taken out from the total amount transported in the circulation path, the grain W containing the contaminant k is sorted into the sorting chamber. In the sorting chamber 20, the grain W swirls in a swirling manner and flows down in the sorting chamber 20 while it is possible to sort (wind-select) almost all of the guided grain W in the sorting chamber 20. For example, the staying time in the chamber 20 becomes longer, so that the sorting efficiency in the sorting chamber 20 can be improved and a more sufficient rough selection effect can be obtained.

Further, according to the roughing machine 7 of the above-mentioned embodiment, apart from the conventional technical idea of sucking and discharging only the foreign matter k, part of the grain W is positively co-located with the foreign matter k. Since the selection is performed by induction, it is not necessary to pay special attention to the suction force of the blower motor 30 as in the conventional case, and the suction force is less likely to be adjusted one by one according to the state of the grain W. It is possible to improve the work efficiency of the drying work.

Furthermore, by providing the guide port 24 of the sorting chamber 20 corresponding to the opening 16 on the upper side surface of the discharge pipe 13 and the return port 17 for the grain W at the lower side surface of the discharge pipe 13,
The grain W can be guided at a high speed, the sorting efficiency in the sorting chamber 20 can be further enhanced, and even if sorting is performed with a part of the circulation amount of the grain W as the target, the dust is discharged as compared with the conventional method. It becomes possible to sufficiently improve efficiency.

Further, since the dust removal efficiency is improved, it is not necessary to forcibly increase the suction force of the blower 21, the output of the blower 21 can be suppressed, and the small blower motor 30 can be used. Energy saving and cost reduction can be achieved. Further, the sorting chamber 20 to which the blower 21 is fixed may be simply attached to the front side surface 13b of the discharge pipe 13 and connected, and the attachment structure can be simplified. It will be possible.

Furthermore, since the guide plates 26 and 27 are provided at the connecting portion between the sorting chamber 20 and the discharge pipe 13, the one guide plate 26 makes the grain W containing the impurities k substantially uniform. It can be continuously guided into the sorting chamber 20. In addition, the protrusion 27a of the other guide plate 27 can make the air flow in the sorting chamber 20 smooth, and the protrusion 27b in the discharge pipe 13 can guide the air flow in the guide plate 26. The guide plates 26 and 27 prevent the foreign matter from being interfered with.
It is possible to very effectively guide the grain W containing the to the sorting chamber 20, and it is possible to further improve the rough selection effect.

In the above embodiment, the guide plate 2
6 and 27 are fixed type, for example, one guide plate 26
Can be slid (withdrawn), or the angle of the guide plate 26 can be changed to adjust the position of the tip portion 26a of the guide plate 26 as shown by the three-dot chain line in FIG. It may be configured as follows. With this configuration,
The amount of the grain W guided into the sorting chamber 20 can be adjusted, and the rough selection work more suitable for the state of the dried grain W becomes possible.

FIG. 7 is a cross-sectional view of the essential parts showing another embodiment of the coarse dryer for grain dryer according to the present invention. The feature of this embodiment is that the sorting chamber 20 is connected to the rear side surface 13d of the discharge pipe 13, and the grain W sorted in the sorting chamber 20 is directly returned to the upper screw 8 instead of the discharge pipe 13. is there. The same or corresponding portions as those in the above embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

In the rough selecting machine 7 of this embodiment, the guide port 24 of the sorting chamber 20 is connected to the opening 16 provided in the upper portion of the rear side surface 13d of the discharge pipe 13, and the opening 22 of the sorting chamber 20 is connected. The lower end formed with is connected to the upper screw 8 from above via a connecting member 48 provided in the case 35 of the upper screw 8 or directly. As a result, the grain W guided and sorted into the sorting chamber 20 is dropped and supplied into the upper screw 8 as it is and returned to the circulation path.

Even with this construction, in addition to the same effects as the above-described embodiment, the chute 32 having the inclination angle β in the above-mentioned embodiment becomes unnecessary, and the return path of the grain W to the circulation path is eliminated. The length of (for example, the connecting member 48) can be minimized, and the height of the discharge pipe 13 and the sorting chamber 20, that is, the height of the grain dryer 1 can be reduced. The effect is obtained.

In the above embodiment, the sorting chamber 20
The case of returning the grains W selected in step 1 to the discharge pipe 13 or the upper screw 8 which is the circulation path has been described.
For example, an appropriate exhaust duct may be attached to the lower end opening 22 of the sorting chamber 20.
And returns to the appropriate position of the circulation path of the grain W that is most suitable for the form of the grain dryer 1 and the state of the grain W, such as returning directly to the storage part 3 via this discharge duct or returning to the elevator 6. It can also be configured as follows.

Further, in the above embodiment, the sorting chamber 20
Although the description has been given of the case of connecting to the front side surface 13b or the rear side surface 13d of the discharge pipe 13, for example, it may be connected to the right side surface 13c of the discharge pipe 13. Further, in the above embodiment, the other guide plate 27 is provided with the protruding portion 27a and the protruding portion 27.
Although it has a modified shape having b, it may be formed in a simple flat plate shape or another shape, and the angle α and the inclination angle β in the above embodiment are not limited to the values in the above embodiment. .

Further, in the above-mentioned embodiment, the connecting structure of the sorting chamber 20, the discharge pipe 13 and the blower 21, the discharge pipe 1
3, the shapes of the sorting chamber 20 and the blower 21, the structure of the upper screw 8 and the like are also examples, and needless to say, various changes can be made without departing from the gist of each invention.

[0052]

As described above in detail, according to the coarse dryer for grain dryers of the first aspect, the discharge pipe provided at the upper part of the elevator is connected to the cyclone type sorting chamber having the blower. , Guide the grains containing contaminants in the discharge pipe into the sorting chamber to sort the grains and contaminants, discharge the contaminants to the outside of the grain dryer through the blower, and return the grains to the circulation route of the grain dryer. Therefore, it is possible to select only the contaminants from the circulating grain and discharge it to the outside, and it is possible to obtain a sufficient rough selection effect.

According to the coarse dryer for grain dryers of the second aspect, an opening communicating with the guide port of the sorting chamber is provided in the upper portion of the side surface of the discharge pipe, and a return port is provided in the lower portion of the side surface. Therefore, of the grains including foreign matter released from the elevator,
The sorting efficiency in the sorting room can be increased, and the rough selection effect is further improved.

Further, according to the rough dryer for grain dryers of the third aspect, since the grain which is guided into the sorting chamber and sorted is returned to the upper conveying mechanism located immediately below it, the grain return path. Can be shortened, and the height of the sorting chamber can be reduced, for example, and the coarse selecting machine can be made compact.

Further, according to the coarse dryer for grain dryer of the fourth aspect, since the guide plate of which the tip portion projects into the discharge pipe is provided at the guide port of the sorting chamber, the foreign matter in the discharge pipe is removed. The contained grains can be guided toward the sorting chamber, the amount of grains supplied into the sorting chamber can be adjusted and made substantially uniform, and the rough selection effect is further improved.

Further, according to the coarse dryer for grain dryer of the fifth aspect, by changing the position of the tip portion of the guide plate, the amount of grain guided into the sorting chamber is adjusted to the suction force of the blower. Therefore, it becomes possible to cope with, for example, the drying operation of grains in various states.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a grain dryer using a coarse sorter according to the present invention.

FIG. 2 is an internal structural diagram of the same.

FIG. 3 is an enlarged side view of the main part of the same.

FIG. 4 is a sectional view taken along the line AA of FIG. 3;

5 is a sectional view taken along the line BB of FIG.

FIG. 6 is a schematic diagram showing the flow of the grain.

FIG. 7 is a cross-sectional view of a main part showing another embodiment of the coarse dryer for grain dryers according to the present invention.

[Explanation of symbols]

 1 --- Grain dryer 3 --- Storage unit 4 --- Drying unit 5 --- Circulation mechanism unit 7 --- Coarse sorter ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Upper screw 9 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Bucket belt 9a ・ ・ ・ ・ ・ ・ Bucket 12 ・ ・ ・ ・ ・ Lower screw 13 ・ ・ ・ ・ ・ Discharge pipe 16 ······················································································・ ・ ・ Guide ports 26, 27 ・ ・ ・ Guide plate 26a ・ ・ ・ Tip 28a ・ ・ ・ ・ ・ Opening 31 ・ ・ ・ ・ ・ Ejection port 32 ・ ・ ・ ・ ・ Shoot k ・・ ・ ・ ・ Contaminants W ・ ・ ・ ・

Claims (5)

[Claims] 1. The grain from the storage section, the drying section and the circulation mechanism section in the dryer main body to the storage section via an elevator provided outside the dryer main body and an upper transfer mechanism provided above the storage section. In a grain dryer having a circulation path, a discharge pipe is provided in a connecting portion with the upper transfer mechanism of the elevator, and a cyclone type sorting chamber having a blower is connected to the discharge pipe, and discharged from the upper part of the elevator into the discharge pipe. Cereals containing impurities,
It guides to the sorting chamber and sorts the grain and the contaminated part, and the contaminated matter is discharged to the outside of the grain dryer through a blower,
A grain sorter coarse sorter, wherein grains are returned to the circulation route of the grain dryer. 2. The sorting chamber guides grains including impurities from a guide port communicating with an opening at the upper side surface of the discharge pipe, and a discharge member connected to the lower end opening of the sorting chamber for the sorted grains. The grain sorter for coarse grain dryer according to claim 1, wherein the grain is returned to the circulation path by supplying the grain into the discharge pipe through a return port provided at the lower portion of the side face of the discharge pipe. 3. The sorting chamber is connected to the discharge pipe so as to be located above the upper transfer mechanism, and guides grains containing impurities from a guide port communicating with an opening at the upper side of the discharge pipe, and sorts the grains. The grain sorter coarse sorting machine according to claim 1, wherein the grain is returned to the circulation path by supplying the grain to the upper transfer mechanism from the lower end opening of the sorting chamber. 4. A guide plate is provided at a guide port of the sorting chamber in a direction substantially tangential to a peripheral wall of the sorting chamber, and a tip end portion of the guide plate is projected into the discharge pipe by a predetermined length, and a guide plate is provided inside the discharge pipe. It is characterized by guiding grains containing impurities into the sorting chamber,
The coarse sorter for a grain dryer according to claim 1, 2 or 3. 5. The coarse grain sorter for a grain dryer according to claim 4, wherein the position of the tip of the guide plate in the discharge pipe is adjustable.