JPH0429353Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a grain drying device for drying grain by using drying air.

[Prior Art] In order to dry grains, a circulation type grain drying device is used, which circulates and flows the grains in a grain tank while supplying drying air to dry the grains.

In this circulation type grain drying device, a lower screw conveyor is disposed at the lower part of the machine body to convey the loaded grains to a grain lifting machine installed upright on one side of the machine body. Furthermore, in order to quickly and reliably process a large amount of grain, grain drying equipment is also used in which lower screw conveyors are arranged in two rows in the longitudinal direction of the equipment.

The two rows of lower screw conveyors on the left and right are designed to convey the loaded grains to the grain lifting machine one by one, so a large amount of grain can be processed in a shorter time than when there is only one lower screw conveyor. It has the advantage of being transportable.

However, in this type of grain drying device, since the rotation direction of the left and right lower screw conveyors is the same, there is a difference in the conveying efficiency of the left and right lower screw conveyors. For example, if both lower screw conveyors rotate clockwise when viewed in the axial direction, the left lower screw conveyor disposed on the left side will be loaded with grains from the left side. For this reason, the grains spread along the spreading plate are not caught between the spreading plate and are thrown up by the spiral blades formed on the screw conveyor. This causes some deterioration in conveyance efficiency.
On the other hand, in the case of the right lower screw conveyor disposed on the right side, grains are loaded from the right side. Therefore, the loaded grains are conveyed so as to be caught between the lower right screw conveyor and the loading sink plate. Therefore, no reduction in conveyance efficiency occurs.

In this way, in a grain drying device in which the left and right lower screw conveyors rotate in the same direction regardless of the direction in which the grain is loaded, there is a difference in conveyance efficiency between the left and right lower screw conveyors, resulting in an inconsistency in loading time. Problems arise in terms of uniformity and extension of the spreading time, which in turn causes uneven drying, which is inconvenient.

[Problems to be solved by the invention] Taking the above-mentioned facts into account, the present invention provides a grain drying device in which the grain conveying efficiency of the lower screw conveyor is improved, the doughing time is uniform in a short time, and uneven drying is less likely to occur. The purpose is to obtain.

[Means for Solving the Problems] In the grain drying device according to the present invention, one end of each is connected to a pair of tensioning hoppers provided on both side walls of the machine body, and the tensioning hoppers are arranged to be inclined downward. A pair of loading sink plates that guide the grains loaded from the hopper and flow down to the substantially central part of the machine body, and a pair of loading sink plates that are arranged correspondingly to the other ends of the pair of loading sink plates, respectively. The grains are rotated in opposite directions along the direction in which the grains are guided by the casting sink plates, and the grains that have flown down while being guided by the pair of casting plates are conveyed in the same direction. A pair of lower screw conveyors are disposed directly above the intermediate portions of the loading sink plates corresponding to the intermediate portions of the loading sink plates between the loading hoppers and the lower screw conveyors, respectively, and and a pair of grain feeding parts that sequentially feed out the grains housed in the container and discharge them onto the pouring sink plate.

[Function] In the grain drying device having the above configuration, when viewed in the axial direction, the lower screw conveyor on the right side rotates clockwise, and the lower screw conveyor on the left side rotates counterclockwise. As a result, the grains loaded from both sides of the machine are conveyed by being caught between the left and right lower screw conveyors and each loading plate, so that the grains are conveyed evenly on both sides without reducing conveyance efficiency. It will be.

Furthermore, since the grain feeding section is located directly above the middle part of the loading sink plate between the loading hopper and the lower screw conveyor, the loading hopper is The grains that have been pasted are guided by the casting sink plate, reach the lower screw conveyor, and are further conveyed by being caught between the lower screw conveyor and the loading sink plate. Therefore, the conveyance efficiency of the lower screw conveyor is greatly improved.

On the other hand, during the circulation/drying operation of the grain drying device, the grains fed out from the grain feeding section directly above the pouring sink plate fall onto the pouring sink plate, and are further guided by this to the lower screen. Reaching the Yuu conveyor,
As in the case of the above-mentioned filling operation, the material is conveyed so as to be caught between the lower screw conveyor and the filling sink plate. Therefore, in this case as well, the conveyance efficiency of the lower screw conveyor is greatly improved.

In this way, the grain conveyance efficiency of the lower screw conveyor can be improved regardless of whether the grain drying device is in the loading operation or the circulation/drying operation.

[Example] Fig. 1 is a sectional view of the grain drying device 10 according to the present invention, Fig. 2 is a sectional view taken along the line shown in Fig. 1, and Fig. 3 is an explanatory diagram of the operation. There is.

The body 12 is an outer frame of the grain drying device 10, which is constituted by a pair of left and right machine walls 14, a pair of front and rear machine walls 16, a ceiling wall 18, and a bottom wall 20, and is shaped like a vertically high box.

The upper inner cavity of the fuselage 12 serves as a grain tank 22.
Further, a drying section 24 is provided at the bottom. In the drying section 24, a pair of ventilated air exhaust passage partition walls 26 are provided in the left and right center portions of the machine body in parallel with the machine walls 14 and span between the machine walls 16 so as to face each other. Exhaust duct partition wall 26
At the upper end, a non-ventilating partition wall 28 having an inverted V-shaped cross section is formed so as to be continuous with the air exhaust path partition wall 26, and the portion surrounded by the air exhaust path partition wall 26 and the partition wall 28 is an air exhaust path 30. It is becoming.

In the lateral direction (on the side of the machine wall 14) of the exhaust passage bulkhead 26, a pair of breathable air guide passage bulkheads 32, 32A, which are parallel to the exhaust passage bulkhead 26 and parallel to each other, are arranged opposite to each other between the machine wall 16. It is being bridged. Air guide partition wall 3
Similar to the partition wall 28, an inverted V-shaped non-ventilating partition wall 34 is continuously spanned over the partition wall 2, 32A, and an air guide path 36 is formed by the partition wall 32, 32A and the partition wall 34. has been done. Therefore, this air guide path 36
The longitudinal directions of the air exhaust passage 30 and the air exhaust passage 30 are parallel to each other.

Furthermore, the lateral direction of the air guide path bulkhead 32A (machine wall 1
4 side), an air-permeable air exhaust passage partition 26A is spanned between the machine wall 14 and the machine wall 16 in parallel with the air guide passage partition 32A. An air-impermeable partition wall 38 is spanned from the upper end of the exhaust passage partition wall 26A to the inner surface of the machine wall 14 at the same inclination as the partition wall 34, and is connected to the ventilation passage partition wall 26A, the machine wall 14, and the partition wall 38. Air exhaust duct 3 between
0A is formed. Therefore, this exhaust passage 30
The longitudinal direction of A is also parallel to the air guide path 36 and the air exhaust path 30.

Between the air guide path and the air exhaust path is a flow path 40 through which the grains in the grain tank 22 flow down. That is, the grains in the flow path 40 flow down the flow path 40 while receiving the drying air sent from the air guide path 36, and the sent drying air absorbs moisture in the grains, dries the grains, and then is exhausted. The air is discharged from the air passages 30 and 30A.

Each lower end of the flow passage 40 is connected to an outflow port 41 formed between the lower end inclined portion of the air guide passage partition wall 32 and the air exhaust passage partition wall 26, and to the lower end inclined portion of the air exhaust passage partition wall 26A and the air guide passage partition wall 32A. A shutter drum 42 serving as a grain delivery section through an outlet 41 formed between
is connected to.

The shutter drum 42 has a hollow cylindrical shape with a horizontal axis, and a slit-like notch with a predetermined width along the axial direction is formed in a part of the outer periphery. This shutter drum 42 rotates around its axis so that the notch and the outlet 41 face each other, so that the grains in the flow path 40 are transferred to the shutter drum 42 through the notch.
When the shutter drum 42 rotates and the notch is positioned downward, the grains that have flowed in are discharged.

A pouring plate 44 is arranged below the shutter drum 42 and tapers downward toward the center between the machine walls 14. Therefore, the grains discharged from the shutter drum 42 are transferred to the pouring sink plate 44.
The materials are transported in two rows to approximately the center between the machine walls 14. Since each casting plate 44 is V-shaped, the grains flowing down from the shutter drum 42 on the left side in FIG. They will each flow down to the pouring sink plate 44.

Lower screw conveyors 46A and 46B for conveying grains are disposed at each lower end of the pouring sink plate 44. As shown in FIG. 2, the lower screw conveyors 46A and 46B are arranged in two rows in parallel in the longitudinal direction of the grain drying device 10, and the spiral blades on the outer periphery collect the grains that enter between them. It is designed to be sent out to the left in Figure 2. Here, the spiral blades fixed to the lower screw conveyors 46A and 46B are in opposite directions, and the rotating directions are also opposite.
That is, the direction of rotation is indicated by arrow A in FIG.

At the end portions of the lower screw conveyors 46A, 46B in the grain conveying direction, a downwardly inclined conveyance guide plate 48 is attached to each lower screw conveyor 46A, 46B.
It is arranged so that it is connected and communicated with. Further, the lower end of the conveyance guide plate 48 is vertically connected and communicated with a bucket conveyor 50 erected on the outside of the machine wall 16.

Inside this bucket conveyor 50, grain conveyor buckets are attached to the endless conveyor at regular intervals, and the grains sent from the lower screw conveyor 46 via the conveyance guide plate 48 are transferred to the grain drying device 10. It is designed so that it can be lifted and transported to the top. Therefore, the grains flowing down the transport guide plate 48 are lifted and transported to the top of the grain drying device 10 via the transport bucket.

One end of an upper screw conveyor 52 corresponds to the upper end of the bucket conveyor 50, and is adapted to receive the lifted and conveyed grains. The other end of the upper screw conveyor 52 extends to the longitudinal center of the grain drying device 10, and a rotary equalizer 54 whose axis is vertical is arranged directly below the other end of the upper screw conveyor 52. ing. Therefore, the grains conveyed to the upper center of the grain drying device 10 by the upper screw conveyor 52 fall onto the rotary equalizer 54 .
The grain tank 2 in the grain drying device 10 is rotated by centrifugal force.
It will be evenly distributed within 2.

A tensioning hopper 56 is provided at the lower part of the machine wall 14, so that grain can be tensioned into the grain drying device 10.

As shown in FIG. 2, an air guide communication passage 60 is formed in the vertical direction in the front side machine wall 16, and a burner 58 for generating drying air is disposed at the lower part of this air guide communication passage 60. This air guide passage 60 communicates with one longitudinal end of the air guide passage 36 in the fuselage 12 . Therefore, the drying air generated by the burner 58 is sent to the air guide path 36 through the air guide communication path 60.

There is an air exhaust passage 64 in the vertical direction on the rear side machine wall 16.
is formed, and a blower 62 for exhausting air is disposed near the exhaust port 65 of this exhaust communication passage 64. This ventilation communication passage 64 communicates with the ventilation passages 30 and 30A. Therefore, this blower 62 is connected to the burner 58.
The drying air is sucked in, sent from each air guide path to the air exhaust path, and is discharged to the outside of the fuselage 12 via the air exhaust communication path 64.

Next, the operation of the grain drying device 10 having the above configuration will be explained.

Circulating system devices of the grain drying device 10 (lower screw conveyors 46A, 46B, bucket conveyor 50, upper screw conveyor 52,
The rotary equalizer 54) is driven.

Grain is loaded into the machine body 12 from the loading hoppers 56 located on both sides of the machine wall 14 of the grain drying device 10 at the same time or from either side. The loaded grains are transferred to the lower center of the machine body 12 (at the location where the lower screw conveyor is installed) by the loading plate 44 to the machine wall 16.
They are transported in two lines with a gap between them. Further, the packed grains are conveyed to the bucket conveyor 50 side by lower screw conveyors 46A, 46B. Third
The figure is an explanatory diagram of the operation of the lower screw conveyor in this case.

In FIG. 3, it is assumed that a bucket conveyor is erected on the back side of the page, and grains are conveyed from the front side of the page toward the back side. FIG. 3A shows each screw conveyor 46 installed in the grain drying device according to the present invention.
A and 46B are shown, with arrow A representing the rotational direction of the screw conveyor, and arrow B representing the moving path of the strung grains. The left lower screw conveyor 46A rotates counterclockwise, and the spiral blades formed on the outer periphery necessarily have a right-handed screw shape. This left lower screw conveyor 46A is loaded with grains from the left side, and the loaded grains are rolled up between the loading sink plate 44 and the left lower screw conveyor 46A, and the lower left screw conveyor 46A is loaded with grains from the left side. It enters between the spiral blades formed on the conveyor 46A and is conveyed from the front side of the page to the back side of the page.

On the other hand, the lower right screw conveyor 46B rotates clockwise, and the spiral blades formed on the outer periphery are necessarily left-handed screw-shaped. This lower right screw conveyor 46B is loaded with grains from the right side, and the loaded grains are placed between the loading sink plate 44 and the lower right screw conveyor 46B, similar to the lower left screw conveyor 46A. It gets caught between the spiral blades formed on the lower right screw conveyor 46B, and is conveyed from the front side of the page to the back side of the page. Therefore, both screw conveyors 4
The grain conveyance conditions by 6A and 46B are equal.

On the contrary, as shown in Figure 3B and C,
When the lower left screw conveyor and the lower right screw conveyor rotate in the same direction, the stuck grains are not caught between the screw sink plate 44 and the screw conveyor, but instead are thrown up. In some cases (Fig. 3 A and B), unevenness and reduction in conveyance efficiency occur. Therefore, this problem can be solved by making the direction of rotation of the left and right screw conveyors to be along the direction of flow of the grains guided by the pouring plate as in this embodiment.

Since a downwardly inclined conveyance guide plate 48 is continuously connected to the terminal end of each screw conveyor in the conveyance direction, the grains are successively conveyed along the conveyance guide plate 48 to below the bucket conveyor 50. Therefore, the grains flowing down the conveyance guide plate 48 are separated and lifted by the bucket of the rotating bucket conveyor 50.

The grains lifted and conveyed above the machine body 12 by the bucket conveyor 50 are sent to the upper central part of the machine body 12 by the upper screw conveyor 52, and the grains in the machine body 12 are transferred by the rotary equalizer 54. It is stored in the grain 22.

Furthermore, after the completion of tensioning, the shutter drum 42
Rotate to feed out the grains. When the burner 58 connected to the body 12 is ignited and the blower 62 is driven, dry air is sent into the air guide path 36 through the air guide communication path 60.

The drying air sent into the air guide path 36 passes through the air exhaust path partitions 32 and 32A, and is directly sent to the grains in the flow path 40. The hot air that has absorbed the moisture in the grains passes through the ventilation duct partitions 26 and 26A and is then discharged to the ventilation ducts 30 and 30.
A, and is further discharged to the outside of the grain drying device 10 through the ventilation passage 64.

Due to the rotation of the shutter drum 42, the flow path 40
After passing through the outlet 41, the grains inside are poured again into the sink plate 4.
4 in the longitudinal direction of the lower part of the grain drying device 10. In this case as well, the grains that have reached the lower screw conveyors 46A, 46B are conveyed so as to be caught between the lower screw conveyors 46A, 46B and the loading sink plate 44, as in the above-mentioned loading operation. be done. Therefore, also in this case, the conveyance efficiency of the lower screw conveyors 46A, 46B is greatly improved.

The transported grains are taken out from a grain outlet (not shown) after the above-described circulation action is repeated within the machine body 12 as necessary until a desired moisture content is reached.

In this way, the grain conveyance efficiency of the lower screw conveyors 46A, 46B can be improved regardless of whether the grain drying device 10 is in the loading operation or the grain drying device is in the circulation/drying operation.

[Effects of the invention] As explained above, in the grain drying device according to the present invention, the grain feeding section is disposed directly above the middle part of the loading sink plate, and the rotation direction of the pair of lower screw conveyors is set to the loading sink. Since the rotation direction is along the flow direction of the grains guided by the plate, the grains loaded from both hoppers are transported under the same conditions, which reduces the transport efficiency regardless of the mode of operation. It has the excellent effect of being able to be conveyed evenly from side to side without causing any drying unevenness.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a grain drying device according to the present invention;
FIG. 2 is a sectional view taken along the line of FIG. 1, FIG. 3A is an explanatory view showing the operation of this embodiment, and FIGS. 3B and C are explanatory diagrams showing the conventional operation. 24...Drying section, 30, 30A...Exhaust duct, 3
6...Air guide path, 40...Downflow path, 44...Insertion sink plate, 46A...Left lower screw conveyor, 4
6B...Lower right side screw conveyor, 50...Bucket conveyor, 56...Holding hopper.

Claims (1)

[Claims for Utility Model Registration] One end of each is connected to a pair of tensioning hoppers provided on both side walls of the machine body and is arranged to be inclined downward, and guides the grains tensioned from the tensioning hoppers. a pair of casting sink plates which are caused to flow down to substantially the center of the fuselage; and a pair of casting sink plates arranged corresponding to the other ends of the pair of casting plates, each of which is guided by the corresponding casting sink plate. a pair of lower screw conveyors that rotate in opposite directions along the grain flow direction and transport the grains that have flowed down in the same direction while being guided by the pair of loading plates; It is arranged directly above the intermediate part of the casting plate between the hopper and the lower screw conveyor, and is arranged directly above the intermediate part of the casting plate between the hopper and the lower screw conveyor to sequentially pay out the grains stored in the machine body and A grain drying device comprising: a pair of grain delivery units that discharge grain onto a pouring plate;