JPH02183791A - Operation control device for grain drying device - Google Patents

Abstract

PURPOSE:To enable an automatic operation of a grain drying machine to be performed in response to an installed state of accessory parts by a method wherein it is judged whether the accessory installed parts are properly installed or not, either a predetermined operation control program or an over-load sensing reference value is selected in response to a result of discrimination and then the grain drying device is operated. CONSTITUTION:A micro-computer 100 is stored in a control panel 48. This is composed of a CPU 102, ROM 104, RAM 106, input port 108, output port 110 and a connecting bus 112. ROM 104 stores an operation program and an allowable current value of a motor corresponding to the operation program. At an operation control device, it is judged whether the accessory parts are properly installed or not and then one of several set operation control programs is selected by the control means. The device is operated by the control means in reference to the selected operation control program. It is not necessary for an operator to judge if the accessory parts are properly installed or not and the operator to change-over the operation every time and then an automatic grain drying device can be operated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an operation control device for a grain drying device, and more particularly to an operation control device for a grain drying device that can be equipped with optional equipment.

[Problems to be Solved by the Prior Art and the Invention 3 Grain drying devices are known that dry the grain by sending hot air while circulating and flowing the grain inside the machine.

This grain drying device includes standard equipment that is installed as standard equipment at the time of manufacture, and optional equipment that is optionally installed as an option.

Among the standard equipment, those used during grain discharge operation include circulation devices such as screw conveyors and packet conveyors, and grain discharge passage opening/closing shutters. During the discharge operation, the grain is transported by the circulation device, and the grain discharge passage opening/closing shutter is operated to open the grain discharge passage, and the dried grain is discharged to the outside of the machine.

On the other hand, as an optional equipment, a thrower for transporting grain can be installed. When this grain conveying thrower is installed at the discharge port of the grain discharge path and driven during discharge operation, the grain discharged from the discharge port can be conveyed to a position separated from the machine body.

If a thrower is installed, in order to prevent a sudden load from being applied when the thrower starts, and to ensure that the grain is discharged, there is a gap between the start of operation of the circulation device and opening/closing shutter and the start of operation of the thrower. It is necessary to provide a time lag.

However, in order to be able to operate the grain drying equipment at low cost, both with and without such optional equipment,
Conventionally, one operating mode (the operating mode when a thrower is installed) is set, and the vehicle is configured to operate based on this.

In other words, when the discharge operation button is operated, a drive signal for the thrower is output (thus, if a thrower is equipped, the thrower is started), and after a predetermined period of time (e.g., 2 to 5 seconds), the circulation device is activated. and the opening/closing shutter operates. Therefore, when the thrower is installed, the grain is fed after the thrower rotates normally, and no sudden load is applied when the thrower is started.

In addition, when the stop button is operated, the circulation device stops and the opening/closing shutter closes, and after a predetermined period of time (for example, 1
After 5 seconds), a thrower stop signal is output (therefore, if a thrower is installed, this thrower will stop). Therefore, in the thrower-equipped state, the thrower is driven even after the circulation device is stopped, and grains can be reliably discharged without remaining inside the machine or inside the thrower.

However, in such conventional grain drying equipment, even when performing a discharge operation without a thrower, the discharge operation mode with a thrower described above (i.e., between the drive of the circulation device and the drive of the thrower) For example, even after the circulation device is stopped by operating the stop button, the thrower will not be able to operate within the time set for stopping the thrower (for example, 15 seconds). had the disadvantage that it was not possible to restart the operation by operating other work selection buttons.

In addition, in order to solve this problem, if a switch was provided to manually switch whether optional equipment such as a thrower is installed or not, and the operation mode was changed using this switch, the work would be complicated. There is also a possibility that the operator may make a mistake in the operation.

On the other hand, in a conventional grain drying apparatus, a thermal relay is connected to each motor for driving a circulation device and a thrower.

Therefore, if an electrical failure occurs in the motors while the grain drying equipment is operating, the motors will be automatically stopped by the thermal relays connected to these motors.
This prevents overdrying due to grain clogging or poor circulation.

However, such conventional thermal relays are expensive, and there is also a possibility that an operator may make a mistake when setting the rated current of the motor depending on optional equipment.

In consideration of the above, the present invention is capable of automatically operating a grain drying device in an operation mode depending on whether or not optional equipment such as a thrower is installed. It is an object of the present invention to provide an operation control device for a grain drying device that can be reliably stopped when an electrical malfunction occurs in the motor, regardless of the state of the motor, and can be made at low cost.

[Means for Solving the Problems] An operation control device for a grain drying device according to the present invention is an operation control device for a grain drying device that can be equipped with optional equipment, and is capable of controlling the operation of a grain drying device in a state where the optional equipment is installed. a discriminating means for discriminating whether a control means for operating the grain dryer;
It is equipped with

[Function] In the operation control device for the grain drying apparatus having the above configuration, when the determination means determines whether or not the optional equipment is installed, one of the plurality of operation control programs is selected according to the determination result. One is selected by the control means. Furthermore, it is operated by the control means based on the selected operation control program.

Therefore, there is no need for the operator to determine whether optional equipment is installed or not and to switch the operation each time, and the grain drying apparatus can be automatically operated, improving work efficiency.

Furthermore, since the allowable current value of the motor can be automatically set depending on whether optional equipment is installed or not, operation can be stopped when the motor is overloaded without using an expensive thermal relay or the like. Therefore, overdrying due to clogging of grains or poor circulation is prevented, and costs are further reduced.

[Example] Fig. 3 shows an overall perspective view of a grain drying apparatus IO to which the operation control device according to the present invention is applied, and Fig. 4 shows an enlarged view of the main parts of Fig. 3. There is.

Further, FIG. 5 shows a schematic configuration diagram of each drive device arranged in the grain drying apparatus 10.

The upper inner cavity of the grain drying device 10 is a grain tank 12, and the lower part thereof is provided with a drying section 16.

A burner 24 is connected to the drying section 16, and a suction exhaust fan driven by a motor 26 is further connected. Therefore, hot air can be generated and blown to the grains in the drying section 16. These burner 24 and motor 26 are connected to a control panel 48 as an operation control device, which will be described later.

A shutter drum that is reciprocally rotated by a motor 28 is disposed in the drying section 16, and feeds out grains within the drying section 16. Further, a lower screw conveyor driven by a motor 32 is arranged in the drying section 16, and conveys the grain fed out by the shutter drum. These motors 28
and the motor 32 are also connected to the control panel 48.

Further, a packet conveyor 36 driven by a motor 38 is installed on the front side of the drying section 16, and can lift and convey grain to the top of the grain tank 12. A dust remover driven by a motor 43 is disposed above the grain tank 12, and discharges the grains contained in the grain transported by the packet conveyor 36 to the outside. At the upper end of the grain drying device 10,
An opening/closing shutter driven by a motor 81 is arranged, and grain can be discharged during grain discharge operation.

In addition, a thrower 92 driven by a motor 90 can be connected to the upper end of the grain drying device 10, and the grain discharged from the grain discharge port can be transported to a position further away (in particular, a position higher than the grain drying device 10). ).

These motors 38, 43, 81, and 90 are also connected to the control panel 48.

At the bottom of the packet conveyor 36 is a moisture sensor 44.
is installed, and the moisture content can be detected by crushing the grain and measuring the electrical resistance.

This moisture sensor 44 is also connected to the control panel 48.

As shown in FIG. 4, on the front of the control panel 48, there are a loading operation button 49, a ventilation operation button 50, a circulation operation button 51,
Work selection buttons such as a drying operation button 52 and a discharge operation button 53, as well as a stop button 54 are arranged.

FIG. 1 shows a configuration diagram of a control circuit within this control panel 48. As shown in FIG.

The control panel 48 has a built-in microcomputer 100. The microcomputer 100 includes a CPU 10
2, ROM104, RAMI 06, input port 108
, an output port 110 and a bus 112 connecting these
It is made up of.

The ROM 104 stores an operating program, which will be described later, and the allowable current value of the motor corresponding to this operating program.

An A/D converter 114, an amplifier circuit 116, a rectifier circuit 118, and a current transformer 120 are connected in series to the human-powered boat 108, and the input terminal of the current transformer 120 is connected to one of the three-phase power lines (R in the figure). phase). The input port 108 is also connected to the aforementioned work selection buttons and the stop button 54. When each of these work selection buttons is operated, each of the aforementioned motors is selected and driven.

The aforementioned motors, burner 24, and moisture sensor 44 are connected to the output port 110 via a drive circuit 122, respectively. When each motor is driven, a current value corresponding to the strength of the magnetic field generated thereby can be measured by the current transformer 120. Further, a buzzer 55 is connected to the output port 110 via a drive circuit 123.

Next, the operation of this embodiment will be explained.

When an operator operates the grain drying apparatus 10, the motors of each drive device are driven by operating each work selection button provided on the front surface of the control panel 48.

Here, when the loading operation button 49 is operated to load the grain, each drive motor of the circulation system of the grain drying device 1o is driven, and the grain is stored in the grain tank 12. After finishing the loading, the drying operation button 52 is operated to drive the motor 28 to rotate the shutter drum and feed out the grain. Then, when the burner 24 is ignited and the motor 26 is driven to rotate the suction/exhaust fan, the drying air is directly supplied to the grains in the drying section 16. This is where the grain is dried.

The dried grains are conveyed to the grain bin 12 again by the packet conveyor 36. Further, during this transportation, the moisture content is detected by the moisture sensor 44. Based on the detected moisture content, the above-described cycling process is repeated until the grain reaches the desired moisture content.

After the grain reaches the desired moisture content and the drying operation is completed,
When the discharge operation button 53 is operated, the burner 24 and the moisture sensor 44 are stopped, and then the grain discharge operation is performed, and the grains are discharged from the grain drying apparatus 10.

A control routine for this discharge operation is shown in FIGS. 2(A) to 2(C).

When the grain drying apparatus 10 is powered on and the discharge operation button 53 is operated in step 130, step 13
2, the ROM 104 of the microcomputer 100
The operation start time T stored in is read out. moreover,
In step 134, the buzzer 55 operates for a predetermined period of time (for example, 2 to 5 seconds), and in step 136, a drive signal for the thrower 92 is output.

Next, in step -138, a reference current value I for determining the equipment state of the thrower 92 is determined. is read out, and it is determined in step 140 whether or not the driving start time T has elapsed.

If the operation start time T has not elapsed in step 140, the process advances to step 142, and the drive current value of the thrower 92 is
is measured. In this case, if the thrower 92 is not installed, the measured value is 0.

Next, in step 144, the drive current value ■ becomes the reference current value I. It is determined whether the value has been reached, and if it has been reached, the flag F is set to 1 in step 146 and the process returns to step 140. On the other hand, if the driving current value I has not reached the reference current value Io in step 144, the flag F is reset (0) in step 148, and then the process returns to step 140. Therefore, flag F is set only when the thrower 92 is installed.

After the operation start time T has elapsed, the process proceeds to step 150, where each motor of the grain drying apparatus 10 is driven and operation is started.

As shown in FIG. 2(B), when the operation of the grain drying apparatus 10 is started, it is determined in step 151 whether or not flag F is set.

If the flag F is set in step 151 (that is, if the thrower 92 is installed), the process proceeds to step 153, where a drive signal for the thrower 92 is output and the thrower is started. Further, in step 155, wait for a predetermined time (for example, 2 to 5 seconds) to elapse, and in step 157, the circulation device (motor 28, 32, 38
) and the opening/closing shutter (motor 81) are operated. Therefore, when the thrower 92 is installed, the grain is fed in after the thrower 92 rotates normally, and no sudden load is applied when the thrower 92 is started.

On the other hand, if the flag F is not set in step 151 (that is, if the thrower 92 is not installed), the process proceeds to step 159, and the circulation device (motor 28.
32.38) and the opening/closing shack (motor 81) are activated. Therefore, the discharge operation is started in a short time and there is no loss of time.

After the discharge operation starts, the drive current value A of each motor is measured in step 152. Additionally, step 154
It is determined whether flag F is set or not.

If the flag F is set in step 154, the process proceeds to step 156, where the allowable current value A1 (for example, 11.5 A) in the thrower 92 equipped state written in the ROM 104 of the microcomputer 100 is read out. Next, in step 158, the read allowable current value A1 is substituted into the comparison reference value B, and then the process proceeds to step 164.

On the other hand, if the flag F is not set in step 154, the process proceeds to step 160, and the allowable current value A2 (for example, 5.6 A) stored in the ROM 104 of the microcomputer 100 in the state where the thrower 92 is not installed is read out. Next, in step 162, after the read allowable current value A2 is substituted into the comparison reference value B,
Proceed to step 164.

In step 164, it is determined whether the drive current value A of each motor measured in step 152 exceeds the comparison reference value B.

If the drive current value A exceeds the comparison reference value B, the process immediately proceeds to step 166. On the other hand, if the drive current value A does not exceed the comparison reference value B in step 164, the process advances to step 168, where it is determined whether the stop button 54 has been operated. If the stop button 54 has been operated, the process advances to step 166; if the stop button 54 has not been operated, the process returns to step 152 and the above-described routine is repeated.

In step 166, each motor of the grain drying apparatus 10 is stopped to stop the discharge operation.

As shown in FIG. 2(C), when the operation of the grain drying apparatus 10 is stopped, it is determined in step 168 whether flag F is set. Step 168
If flag F is set in step 170
Then, the circulation device (motor 28, 32, 38) stops and the opening/closing shutter (motor 81) closes. Furthermore, in step 172, a predetermined period of time (for example, 15 seconds)
Wait for the elapsed time to elapse, and in step 174 thrower 92
A stop signal is output, and the thrower 92 stops. Therefore, when the thrower 92 is installed, the thrower 92 is driven even after the ring device is stopped, and the grain can be reliably discharged without remaining inside the machine or inside the thrower.

On the other hand, if flag F is not set in step 168, the circulation device (motor 28, 32, 38) is stopped in step 176, the opening/closing shutter (motor 81) is closed, and a stop signal for the thrower 92 is output. The process ends without any problem. Therefore, when the thrower 92 is not installed, other work operations can be started immediately after the circulation device is stopped without waiting for a predetermined period of time to elapse.

In this way, when the operator operates the discharge operation button 53 to start the discharge operation of the grain drying device 10,
The microcomputer 100 automatically determines whether or not the thrower 92 is installed, and the subsequent operation control program is selected based on this determination. Furthermore, it is automatically operated according to the selected operation control program.

Therefore, there is no need for the operator to determine whether or not the thrower 92 is installed and to switch the operation each time (work efficiency is improved).

Further, since the allowable current value of each motor is automatically set depending on whether the thrower 92 is installed or not, the operation can be stopped when the motor is overloaded without using an expensive thermal relay or the like. Therefore, over-drying due to clogging of grains or poor ring is prevented, and costs are further reduced.

Note that in this embodiment, the drive current value I of the thrower 92 is
By measuring and comparing this with the reference current value I0,
Although the configuration is such that it is determined whether or not the thrower 92 is installed, the present invention is not limited to this, and other sensors may be used to determine whether the thrower 92 is equipped or not.
It may be configured to determine whether or not the device is equipped with the device.

Even in this case, it can be operated automatically and work efficiency is improved.

In addition, in this embodiment, a thrower 9 is provided as an optional equipment.
2 is used, the present invention is not limited to this, but can also be applied to other optional equipment such as a pipe type conveyor or a spring type conveyor.

[Effects of the Invention] As explained above, the grain drying device operation control device according to the present invention automatically operates the grain drying device in an operation mode depending on whether optional equipment such as a thrower is installed or not. It also has the advantage of being able to be stopped reliably in the event of an electrical failure in the motor regardless of whether it is equipped with optional equipment or not, as well as being low cost. have.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a control circuit in a control panel according to an embodiment of the present invention, FIGS. 2(A) to 2(C) are flowcharts showing a control routine during discharge operation, and FIG. Figure 4 is an overall perspective view of the grain drying equipment, Figure 3 is an enlarged view of the main parts showing the control panel,
FIG. 5 is a schematic diagram of each motor arranged in the grain drying device. IO...Grain drying device, 48...Control panel, 53...Discharge operation button, 92...Thrower, 100...Microcomputer.

Claims (1)

[Claims] (1) An operation control device for a grain drying equipment that can be equipped with optional equipment, comprising a determining means for determining whether or not the optional equipment is installed, and a determination result by the determining means. A control means for selecting a preset operation control program or overload detection reference value and operating the grain dryer using the selected operation control program or overload detection reference value; Control device.