JP2002147954A - Small-sized circulating grain dryer and grain drying method using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dry the grain to be dried to a predetermined moisture value without causing dehulling by using this small-sized circulating grain dryer, even if the grain to be dried is paddies with open caryopsis. SOLUTION: The operation of the lower screw conveyer mounted in the machine body of a small-sized circulating grain dryer is controlled to be intermittent operation of driving at predetermined intervals, and the number of circulation of the grains fed to the grain tank in the machine body to be circulated until they are dried to a predetermined moisture value is set to decrease to one half or one part in several of the number of circulation at the time when the lower screw conveyer is continuously operated. Then, the grains are fed to the grain tank in the machine body to be dried.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circulating system in which grains embedded in a machine body are transported out of the machine by a lower screw conveyor provided at the bottom of the machine body, lifted by an elevator, and returned to an upper portion of the machine body. Among the circulating-type grain dryers in which hot air is fed to the circulating flowing grains in a drying section provided in the body to dry the grains, the lifting and lowering of the grains is performed by the elevator. The present invention relates to an improvement in a small-sized circulating-type grain dryer that also serves to throw it into the machine body by throwing it out.

[0002]

2. Description of the Related Art As described in Japanese Utility Model Application Laid-Open No. 63-89596, for example, a small circulating grain dryer of the above-mentioned type has an equalizer for evenly distributing grains into the body. It is omitted, and the valve shutter (drum shutter) is omitted for dropping and discharging the grains exposed to hot air (dry air) in the drying section inside the machine toward the lower screw conveyor. ing.

[0003] Specifically, as shown in FIGS. 1 and 2, as shown in FIGS. 1 and 2, an elevator 2 erected on the front side of a box-shaped machine body 1 is stored in a lifting tower 20 thereof. The lifting stroke side 21a of the bucket conveyor 21 to be
, The lower stroke side 21b faces the fuselage 1 and is erected on the front surface of the fuselage 1 so that the bucket 22 of the bucket conveyor 21 reaches the upper end of the upward stroke side 21a, and the upper pulley When turning around the lower gear 23 and moving to the descending stroke side 21b, the grains are released to the grain tank portion a in the machine body 1 by using the operation of discharging the grains, whereby the grains are released. So that the upper screw conveyor (not shown) and the equalizer (not shown) are omitted.

Further, a pair of air-permeable partition walls 30 facing each other
The grain flow path 3 is formed by a hot air supply path 4 provided on one side of the grain flow path 3 and the exhaust air path 5 provided on the other side of the grain flow path 3. The lower end side of the grain flow path 3 of the drying section b is connected directly to the inner cavity of the conveying gutter 60 of the lower screw conveyor device 6 provided horizontally at the bottom of the machine body 1 in advance. The lower edge of one of the right and left air-permeable partitions 30 forming the under-grain path 3 is connected to the floor of the transport gutter 60, and the lower edge of the other partition 30 is transported. By placing the gutter 60 at a position raised from the floor surface of the gutter 60, the grain trough part a
The grain that has flowed in from the bottom of the opening w is formed between the lower end edge of the other partition wall 30 and the floor surface of the conveying gutter 60.
From the bottom of the partition 30 to the floor of the transport gutter 60. By reaching the corner, the accumulated grains close the open mouth w, stop the overflow of the grains, and stop the flow of the grains in the grain downflow path 3. Open mouth w to accumulate
The lower screw conveyor 61 is arranged outside the, so that the grains overflow from the opening w as much as the grains are carried out. The valve shutter or the drum shutter provided so as to close the shutter is omitted.

[0005] The grain tank into which the grain to be dried is to be spread is set to the capacity of a normal circulation type grain dryer having a capacity of about 20 to 30 stones. On the other hand, about 10 stones, which is a fraction of the number, is used to constitute an inexpensive small-sized circulating grain dryer.

[0006]

The small-sized recirculating grain dryer of the above-mentioned type disperses grains into the machine body by using the throwing of grains from buckets of a bucket conveyor of an elevator. The upper screw conveyor for horizontal installation mounted on the upper part of the fuselage and the equalizer for equalizing and discharging the grains discharged from the end of the upper screw conveyor are omitted. The screw conveyor keeps the angle of repose when carrying out the grains and collapses the accumulated grains so that the grains in the grain flow path are fed out, so that the drum shutter or the valve shutter is opened. Because it is omitted, it is made into a low-priced grain dryer, but because it is made small, the capacity of the grain tank inside the aircraft is small, so the amount of penetration is small, Grains up to the specified moisture level Grain circulation number of times of up to raise dried has become many.

However, this small-sized circulating grain dryer has a problem that a large amount of degranulation occurs depending on the condition of the harvested grains.

[0008] In particular, when the harvested cereal is subjected to the drying operation of the open hulls (which may be generated in large quantities due to the weather) due to cracking of the rice hulls at the time of cutting, the hulls are stretched inside the machine. At a point where the circulation of the incorporated grains is repeated several times, the grains completely escape and become brown rice grains. Then, when the grain that has become brown rice is dried,
The fact that the grains are easily scratched and cracked easily causes a problem that the quality and grade of the dried grains are remarkably reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve the problem of the conventional small circulating grain dryer, and even if the grain to be dried is an open grain paddy, It is an object of the present invention to provide a new means that can be dried to a predetermined moisture value without causing a loss by using a small circulation type grain dryer.

[0010]

Means for solving the above-mentioned problems The present invention for achieving the above object can be obtained by conducting various studies on the drying operation of a small-sized circulating grain dryer and a large-sized circulating grain dryer. It has been completed based on the obtained knowledge.

[0011] That is, a large circulating grain dryer can be dried without causing dehullation even if the grain to be dried is an open grain, but a small circulating grain dryer is used. When the machine performs drying of the spun rice, a large amount of degranulation occurs.

By the way, a large circulating type grain dryer that allows the sprinkled rice seeds to spread without causing swelling has a grain filling capacity several times smaller than that of a small circulating grain drying machine. By increasing the size by a factor of two, the number of circulations of the grain until the embedded grain is dried to a predetermined moisture level is reduced when a small circulating grain dryer dries the grain to a predetermined moisture level. Compared to the required number of circulations, the number is reduced to a fraction.

[0013] From this fact, it was noticed that the dehulling that occurred when drying the unhulled rice was affected by the circulation flow during the drying process. When drying is performed, it is thought that the spikelets embedded in the aircraft come out by circulating several times, and conversely, they do not come out until repeated several times,
By controlling the operation of the lower screw conveyor, which controls the circulation operation of the grains of the small circulation type grain dryer, to be performed intermittently by incorporating a timer, the circulation of the grains during the drying process This is because it was found that, when the number of times was reduced by half and the spun rice was dried, drying to a predetermined moisture value could be performed with almost no loss of moisture. .

From the above, in the means of the present invention, as means for achieving the above-mentioned object, the operation of the lower screw conveyor mounted on the body of the small circulating grain dryer is performed at a predetermined interval. The lower screw conveyor is continuously operated by controlling the number of circulations of the grain to be circulated by sticking it to the grain tank section inside the machine and drying it to a predetermined moisture value. A small circulation type characterized in that the number of circulations at the time of setting is set to be reduced by half to a fraction, and grains are stuck into a grain tank portion in the body and dried. The present invention proposes a method of drying a grain using a grain dryer, and furthermore, a control circuit of a motor for driving a lower screw conveyor mounted on the body of a small circulating grain dryer has a function to control the operation of the motor by a predetermined interval. Incorporating a timer device that performs intermittent operation with the intermittent operation, the intermittent operation of the lower screw conveyor causes the number of circulations of the kernel until the kernel is dried, the circulation when rotating the lower screw conveyor in a continuous state The present invention proposes a small-sized circulating grain dryer characterized in that the number is reduced to approximately half to one-several with respect to the number of times.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The basic structure of a small circulating grain dryer used in the means of the present invention is shown in FIGS. In the same manner as the grain dryer, the introduction of the grains into the grain tank portion a in the machine body 1 is performed by releasing the buckets 22 of the bucket conveyor 21 stored in the hoisting tower 20 of the elevator 2 erected on the front of the machine body 1. In operation, the upper screw conveyor and the equalizer for insertion are omitted, and the lower end side of the grain downflow path 3 of the drying unit b is connected to the transport gutter 60 of the lower screw conveyor device 6. An open port w for overflowing grains is formed between one of the lower edges of the pair of air-permeable partition walls 30 constituting the grain flow-down passage 3 and the floor surface of the conveying gutter 60. By disposing the lower screw conveyor 61 at the position, By omitting the drum shutter or valve shutter provided on the end portion, it is configured to that of inexpensive forms.

However, with respect to the lower screw conveyor 61 for causing the grains to circulate and flow, the operation of the motor M is provided at a predetermined interval in the control circuit for controlling the operation of the motor M for driving the screw shaft 61a. Incorporating a timer device that controls to be performed by intermittent operation, whereby the operation of the lower screw conveyor 61 driven by the motor M is performed as an intermittent operation in which a suspension period in which rotation is stopped is interposed at a predetermined interval,
The circulation operation of the grains by the operation of the lower screw conveyor 61 is reduced by the amount of the suspension period, and the number of circulations of the grains until the drying is completed is reduced.

Here, the idle period in which the rotation of the lower screw conveyor 61 is stopped at predetermined intervals set during the operation stroke of the lower screw conveyor 61 by the timer device is defined by the time length thereof and the rotation time interval of the time length. The number of times of circulation of the grain until the end of the drying process calculated from the ratio of one operation time of the lower screw conveyor 61 to be operated and the filling capacity of the small circulating grain dryer is calculated by Is set to be equal to or close to the number of circulations of the grain until the end of the drying process in a large-sized circulation type grain dryer in which almost no loss occurs even if drying is performed.

For example, if the filling capacity of a small circulating grain dryer is 10 stones and the filling capacity of a normal large circulating grain dryer is 20 stones, the lower screws incorporated in these are Since there is almost no difference in the size and shape of the conveyor 61 and the transport capacity, the number of times of circulation of the grains until the embedded grains are dried is smaller than that of the large-size circulation grain dryer in a small-size circulation grain dryer. Since the number of circulations is doubled, the number of circulations is set so that the number of circulations is reduced to half and the number of circulations is about the same as that of the large-sized one.

The control circuit of the motor M is provided with a continuous operation circuit for drying a normal grain, which performs a normal continuous operation without incorporating the above-mentioned timer device. The switching with the intermittent operation circuit provided is performed, for example, by providing a switching dial 70 on an operation panel 7 of a controller mounted on the front side of the body 1 as shown in FIG. Be able to do it by operation.

At this time, the control circuit of the motor M includes, for example,
For example, an intermittent operation in which a pause for 2 minutes is repeated, and an intermittent operation in which a drive for 2 minutes and a pause for 2 minutes are repeated,
A plurality of timer devices having variations in the repetition mode of circulating drying performed by driving the lower screw conveyor 61 and stationary drying performed by stopping the lower screw conveyor are incorporated into the operation panel 7 described above. As shown in FIG. 8, the switching dial 70 is provided with a scale 700 for intermittent 1 for selecting and setting the above-described repetition every one minute and a scale for intermittent 2 for selecting and setting the above-described repetition every two minutes. 701 and a standard scale 702 for selecting and setting the operation for continuous operation as in the prior art may be provided so that the switching can be selected by rotating the switching dial 70.

Further, the number of times the grains are circulated until the grains are dried by controlling the operation of the lower screw conveyor 61 for circulating and flowing the grains loaded into the machine body 1 is controlled by a large circulation type grain dryer. The control for making the number of circulations of the grains substantially equal to or close to the number of times the grains are circulated until the grains are dried is performed, for example, by using a memory card provided with a semiconductor storage device on the operation panel 7 of the above-described controller. The insertion operation of the small circulating grain dryer A is built into the storage device provided in the memory card 8 by providing the insertion slot 71 of the memory card 8 and inserting the memory card 8 therein. The drying is carried out in accordance with a drying process program, and the memory card 8 is incorporated in a drying process program for drying the grains to a predetermined moisture level. Speed, and for standby multiple remembering variations on the number of times for circulating the grain before raising dried to a predetermined moisture value, by changing cuttings select them card 8 ..., in the drying method of choice,
The number of times of circulation of the grain may be controlled so as to be substantially equal to or close to the number of times of circulation of the grain when the grain is dried by a large-sized circulation grain dryer.

[0022]

As described above, the means for drying a grain using the small circulating grain dryer according to the present invention operates the lower screw conveyor mounted on the body of the small circulating grain dryer. Is set to an intermittent operation that is driven at predetermined intervals, so that it can be inserted into the grain tank section of the machine body, and from the drying section below the grain tank section to the grain tank section again by the elevator via the lower screw conveyor. The number of circulations of the grain that circulates back while drying up to a predetermined moisture value,
Since it is set to half to a fraction, the grain is stuck into the grain tank inside the aircraft and dried.
Even when the grain to be dried is open grain, it is possible to prevent it from coming off completely to form brown rice grains and to dry it to a predetermined moisture value.

[Brief description of the drawings]

FIG. 1 is a vertical sectional front view of a small circulating grain dryer.

FIG. 2 is a vertical sectional side view of the same.

FIG. 3 is a schematic perspective view of the whole of the above.

FIG. 4 is a cross-sectional plan view of the same.

FIG. 5 is a vertical sectional front view of a main part of the above.

FIG. 6 is a front view of an operation panel assembled to a controller mounted on the airframe of the above.

FIG. 7 is a perspective view of a memory card inserted into a card insertion slot provided in the operation panel of the above.

FIG. 8 is an enlarged front view of a switching dial provided on the operation panel of the above.

[Explanation of symbols]

A: circulation type grain dryer, M: motor, a: grain tank, b:
Drying section, w ... opening opening, 1 ... body, 2 ... lift, 20 ... frying tower, 21 ... bucket conveyor, 21a ... up stroke side,
21b: Downward stroke side, 22: Bucket, 23: Upper pulley, 3: Grain flow down path, 30: Partition wall, 4: Feeding path, 5 ...
Exhaust air path, 6 lower screw conveyor device, 60 transport gutter, 61 lower screw conveyor, 61a screw shaft, 7 operation panel, 70 switching dial, 700/70
1, 702: scale, 71: insertion slot, 8: memory card.

Continued on the front page (72) Inventor Tsunemi Yuki 404 Oinomori Mori, Tendo City, Yamagata Prefecture, Ltd. Inside Yamamoto Works, Ltd. (72) Inventor Nobuhiko Onuma 404 Oinomori Mori, Tendo City, Yamagata Prefecture, F-term in Yamamoto Works, Ltd. 3F075 AA09 BA05 BB01 CA04 CA09 CB14 CC03 CC05 CC11 CC19 3L113 AA04 AA10 AB03 AC40 AC63 AC78 BA03 CA20 CB22 DA24 4D043 BB09

Claims (3)

[Claims] An operation of a lower screw conveyor mounted on a body of a small-sized circulating grain dryer is controlled so as to be an intermittent operation driven at a predetermined interval, so that a grain tank section in the body is controlled. Set to reduce the number of circulations of kernels to be spread and circulated during drying up to a predetermined moisture value to half or a fraction of the number of circulations when the lower screw conveyor is continuously operated. A method of drying a grain using a small circulating grain drier, wherein the grain is pasted into a grain tank in the machine and dried. 2. A control circuit for a motor that drives a lower screw conveyor mounted on the body of a small circulating grain dryer, incorporating a timer device for intermittently operating the motor at predetermined intervals. Due to the intermittent operation of the lower screw conveyor, the number of circulations of the kernels until the kernels are dried becomes approximately half to a fraction of the number of circulations when the lower screw conveyor is rotated in a continuous state. A small circulating grain dryer characterized by the following. 3. A timer device for intermittently operating the motor at a predetermined interval is incorporated in a control circuit of a motor for driving a lower screw conveyor mounted on the body of a small circulating grain dryer. An intermittent operation circuit and a continuous operation circuit that continuously drives the operation of the motor are connected and provided, and these circuits can be switched by turning a switching dial provided on a control panel of a controller mounted on the front of the body. 3. The method according to claim 2, wherein
A small circulating grain dryer as described.