JP3582050B2 - Grain dryer control device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a control device for a grain dryer, and more particularly to a control device for a grain dryer that can smoothly operate a circulation mechanism at the start of drying.
[0002]
[Prior art]
The grain dryer is provided with a transport mechanism provided with a transport motor to stretch and transport the grains into the grain dryer, and a circulation motor is provided to deposit and circulate the grains in the grain dryer. A circulating mechanism is provided, and the transport motor and the circulating motor are driven to control drying of the grain.
[0003]
[Problems to be solved by the invention]
By the way, in the control device of the grain dryer, when the grains are deposited in the grain dryer, the grains are deposited in a form that bites into the circulation mechanism, so that the circulation mechanism is locked, and the circulation mechanism at the start of drying. There was a problem that the operation of the part became unsmooth. To solve this problem, a large circulating motor that generates a large torque may be installed. However, the large circulating motor is disadvantageously expensive.
[0004]
In addition, during the loading operation, the transport mechanism is operated. When the circulation mechanism is activated in the same manner as the drying operation at the same time as the operation of the transport mechanism, the grain loading capacity is reduced. There is a disadvantage that the temperature is reduced by an amount corresponding to the operation of (.about.50%).
[0005]
[Means for Solving the Problems]
Therefore, in order to eliminate the above-mentioned disadvantages, the present invention provides a transport mechanism provided with a transport motor to stretch and transport grains into a grain dryer, and deposits grains in the grain dryer. And a circulating mechanism provided with a circulating motor so as to circulate, and in the cereal control device that controls the drying of the cereal by driving the transport motor and the circulating motor , the first time of the initial stage of the stuffing operation of the cereal Control means for controlling the driving of the circulating motor at regular intervals in a first cycle, and controlling the driving of the circulating motor at regular intervals in a second cycle longer than the first cycle after the lapse of the first time Is provided.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
The present invention controls the drive of the circulation motor at regular intervals in a first cycle in a first period of the initial stage of grain filling operation, and after a lapse of a first period, a constant time in a second cycle longer than the first cycle. Since the circulation motor is driven and controlled every time, the circulation motor is periodically driven in a short period of time at the beginning of grain filling to avoid the grain digging phenomenon, smoothly operate the circulation mechanism, and start the drying operation. In addition, the excessive torque of the circulating mechanism can be eliminated, the fall of the grain staking ability can be prevented, and the size of the circulating motor can be reduced.
[0007]
【Example】
Hereinafter, embodiments of the present invention will be described in detail and specifically with reference to the drawings. 1 to 5 show an embodiment of the present invention. 4 and 5, reference numeral 2 denotes a grain dryer. The grain dryer 2 includes an upper storage unit (not shown), a middle ventilation drying unit 4 and a lower grain collection unit 6, and a transport mechanism unit 8 for transporting and circulating grains. And a circulation mechanism 10.
[0008]
In the ventilation drying unit 4, as shown in FIG. 5, first to fourth flow paths extending vertically by first to fourth passage forming members 12-1 to 12-4 made of a perforated plate or the like. 14-1 to 14-4 are formed.
[0009]
The transport mechanism unit 8 includes a lower transport screw 16 provided at a substantially central portion in the lower part of the grain collecting unit 6 and devices (not shown) such as an elevator, an upper transport screw, a rotary distributor, and the like. As shown, a transport motor 18 for operating these devices is provided.
[0010]
As shown in FIGS. 4 and 5, the circulation mechanism unit 10 is provided in the grain collection unit 6, and includes first to fourth rotary units disposed in correspondence with the first to fourth flow grain passages 14-1 to 14-4. It has valves 20-1 to 20-4 and a circulation motor 22 that operates these first to fourth rotary valves 20-1 to 20-4.
[0011]
The first to fourth rotary valves 20-1 to 20-4 are provided with first to fourth valve sprockets 24-1 to 24-4. The circulation motor 22 is provided with a motor sprocket 26. Further, first and second idler sprockets 28-1 and 28-2 are provided near the first rotary valve 20-1. A circulation chain 30 is wound around the first to fourth valve sprockets 24-1 to 24-4, the motor sprocket 26, and the first and second idler sprockets 28-1 and 28-2.
[0012]
In the grain collecting section 6, as shown in FIG. 5, the first to fourth guide members 32-1 to 32-4 correspond to the first to fourth flow grain paths 14-1 to 14-4. A first guide gutter 34-1 is provided between the first and second rotary valves 20-1 and 20-2, and further a third guide valve 34-1 and 20-4 are provided between the third and fourth rotary valves 20-3 and 20-4. Is provided with a second guide gutter 34-2. Further, first and second grain collecting gutters 36-1 and 36-2 are provided obliquely to the lower transport screw 16 located at the lower portion at the center.
[0013]
The operation of the grain dryer 2 is controlled by a control device 38 as shown in FIG.
[0014]
On the input side, the control means 40 of the control device 38 includes, on the input side, an operation switch 46 having buttons such as an inlay button 42 and a stop button 44, a grain amount setting switch 48, a stop moisture setting switch 50, and a grain selection switch. The switch 52, the safety device 54, the temperature sensor 56, and the moisture meter 58 are in communication.
[0015]
Further, the control means 40 is connected to the output side by a blower motor 62 and a dust discharge motor 64 via a first drive circuit 60, by the transport motor 18 via a second drive circuit 66, and by a third drive. The circulation motor 22 communicates via the circuit 68, the burner 72 communicates via the fourth drive circuit 70, the display 74 communicates, and the stir lamp 76 communicates.
[0016]
When various signals are input and the transport motor 18 is driven in the grain filling operation, the control means 40 causes the circulation motor 22 to rotate at a constant period T ₁ (for example, several tens seconds) as shown in FIG. Drive control is performed every t (for example, 5 seconds).
[0017]
The control means 40 is for driving and controlling the circulation motor 18 every predetermined time t at a predetermined period T ₁ from the time of detecting the Zhang inclusive cereals (t _o).
[0018]
Furthermore, the control unit 40, drives the circulation motor 18 every predetermined time t (seconds) in the first hour of Chokomi initial operation _R 1 first period in _{(t 1} hour from _{t o) T 1} (several tens of seconds) controls, after the lapse of t ₁ of the first time R ₁ drives and controls the circulation motor 18 every predetermined time t (seconds) in the first period T ₁ longer second period T ₂ than _(several minutes) Things.
[0019]
Next, the operation of this embodiment will be described based on the flowchart of FIG.
[0020]
When the power of the grain dryer 2 is turned on and the program of the control means 40 is started (step 102), first, it is determined whether or not the operation switch 46 is turned on (step 104).
[0021]
If this step 104 is NO, this determination is continued.
[0022]
If the answer in Step 104 is YES, it is determined whether or not the sticking button 42 is pressed to perform the sticking operation (Step 106).
[0023]
If this step 106 is NO, the operation is changed to an operation other than the squeezing operation (step 108).
[0024]
If step 106 is YES, the transport motor 18 is driven (turned on) (step 110).
[0025]
Then, it is determined whether or not the transport motor 18 is stopped (Step 112).
[0026]
If this step 112 is YES, the operation of the whole grain dryer 2 is stopped (step 114), and the process returns to step 104.
[0027]
If step 112 is NO, it is determined whether or not a fixed time (for example, 20 seconds) has elapsed since the drive of the transport motor 18 (step 116).
[0028]
If this step 116 is NO, the process returns to step 112.
[0029]
If step 116 is YES, the circulation motor 22 is driven (turned on) for a fixed time (for example, 5 seconds) (step 118).
[0030]
Then, it is determined whether or not the circulation motor 22 has been driven six times or more (step 120).
[0031]
If step 120 is NO, the process returns to step 112.
[0032]
If step 120 is YES, it is determined whether a predetermined time (for example, 3 minutes) has elapsed (step 122).
[0033]
If this step 122 is YES, the process returns to step 118.
[0034]
If step 122 is NO, it is determined whether the circulation motor 22 is stopped (step 124).
[0035]
If this step 124 is NO, the process returns to step 122.
[0036]
If step 124 is YES, the process returns to step 114 and the grain dryer 2 is stopped.
[0037]
That is, in the grain filling operation, at least the transport motor 18 is driven, and the circulation motor 22 is driven for a short period at a predetermined cycle. Then, when the grain is stuck into the grain dryer 2, the grain falls from the lower conveying screw 16, the elevating machine, the rotary distributor, and the like into the storage unit, and the grain is deposited in the form of cutting into the rotary valve 20. Since the motor 22 is driven periodically, this biting state can be avoided.
[0038]
In addition, if a certain amount of grain is deposited on the entire rotary valve 20, the grain will not be cut off thereafter.
[0039]
Accordingly, excessive torque of the circulation mechanism 10 due to the biting phenomenon is particularly likely to occur in about 25% of wheat. However, even in this case, the biting phenomenon is avoided, and thus, it occurs in grains having shells such as paddy and wheat. It does not occur even in dry wheat or high-moisture wheat.
[0040]
This makes it possible to drive the circulation motor 22 in a short time periodically at least in the initial stage of the inflation, to avoid the digging phenomenon of the grain, and to eliminate the excessive torque of the circulation mechanism 10 at the start of the drying operation.
[0041]
In order to satisfy both the effect of eliminating the excessive torque and the prevention of the dropping ability, the driving cycle of the circulating motor 22 is set to several tens of seconds of the first cycle for several minutes from the start of the tensioning, and the driving time is reduced. The operation cycle is set to several seconds, and after several minutes, the operation cycle is set to several minutes of the second cycle .
[0042]
Further, the size of the circulation motor 22 can be reduced, and the circulation mechanism 10 does not need to be increased in strength due to temporary excessive torque, so that the cost can be reduced.
[0043]
Furthermore, since there is no need to operate the circulation mechanism 10 continuously during the extension operation, a decrease in the extension capability can be suppressed to within 10%.
[0044]
Note that, in this embodiment, even if the stuffing operation is started, if stuffing is not performed for several minutes for some reason, the cereal stuffing start is detected by some method, and for several minutes from that time. It is also possible to drive the circulation motor 22 for several seconds at intervals of several tens of seconds. As a method for detecting the start of the filling, the moisture meter can be operated to detect the presence / absence of a grain, or to detect the change in the current value of the transport motor 18.
[0045]
【The invention's effect】
As apparent from the detailed description above, according to the present invention, the drive of the circulation motor is controlled at regular intervals in the first cycle in the first period of the initial stage of the grain filling operation. By providing the control means for controlling the drive of the circulating motor at regular intervals in a second cycle longer than one cycle, at the beginning of the grain penetration, a first time in the first cycle in the initial stage of the penetration operation. Every time, and after the first time has elapsed, the circulation motor is driven at regular intervals in a second cycle longer than the first cycle, thereby avoiding the grain digging phenomenon, smoothly operating the circulation mechanism, and drying. Excessive torque of the circulation mechanism at the start of operation can be eliminated.
[0046]
In addition, since the size of the circulation motor can be reduced, the cost can be reduced.
[0047]
Furthermore, it is not necessary to operate the circulation mechanism continuously, and it is possible to suppress a decrease in the insertion ability.
[Brief description of the drawings]
FIG. 1 is a flowchart of grain drying control.
FIG. 2 is a time chart of a run-in operation.
FIG. 3 is a block diagram of a control device.
FIG. 4 is a side view of a grain collecting unit of the grain dryer.
FIG. 5 is a sectional view of the grain collecting unit of FIG. 4;
[Explanation of symbols]
2 Grain dryer 6 Grain collecting section 8 Conveying mechanism section 10 Circulating mechanism section 18 Conveying motor 20 Rotary valve 22 Circulating motor 38 Control device 40 Control means

Claims (1)

Providing a transport mechanism provided with a transport motor to stretch and transport the grains into the grain dryer, and providing a circulation mechanism provided with a circulation motor to deposit and circulate the grains in the grain dryer. A cereal control device for controlling drying of the cereal by driving the transport motor and the circulating motor , wherein the circulating motor is drive-controlled at regular intervals in a first cycle in a first time of an initial stage of the grain filling operation. And a control means for controlling the driving of the circulation motor at regular intervals in a second cycle longer than the first cycle after the first time has elapsed .

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