JPH02178588A - Grain drying device - Google Patents

Abstract

PURPOSE:To facilitate an inspection, a maintenance or check of a plurality of motors and enable a positive stopping of the motors in case of an electrical trouble by a method wherein a current value of a motor selectively driven is displayed and at the same time if the current value exceeds an allowable current value of the motor, the motor is stopped. CONSTITUTION:A front surface of a control panel 48 is provided with each of working selection buttons such as a feeding operation button 49, an air feeding operation button 50, a circulating operation button 51, a drying operation button 52 and a discharging operation button 53 as well as a stop button 54. The front surface of the control panel 48 is provided with a displaying part 55 acting as a displaying means and an electrical current value is displayed. An operation program and an allowable current value of the motor driven selectively in response to the operation mode selected by each of the operation selecting buttons are stored in a ROM 104. During operation of a grain particle drying device, if a measured current value exceeds an allowable current value of the motor selectively driven in response to the operation mode, a stop signal of the driven motor is outputted and the motor is positively stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a grain drying device, and more particularly to a grain drying device driven by a plurality of motors.

[Prior Art and Problems to be Solved by the Invention 1] A grain drying device is known in which grain is dried by supplying hot air while circulating and flowing the grain inside the machine.

This type of grain drying equipment includes a circulation device (shutter drum, lower screw conveyor,
A packet conveyor, an upper screw conveyor, and a rotary equalizer) are installed, and the grain is circulated within the machine. Additionally, the machine is equipped with a burner and a suction/exhaust fan, which can generate hot air and send the generated hot air (drying air) to the grain.

Therefore, during drying operation, the circulation device, the burner, and the suction/exhaust fan are all driven, while during the circulation blowing operation to prevent the grain from getting stuffy inside the machine, the burner is stopped and outside air is blown by the suction/exhaust fan. .

Furthermore, a grain discharge passage opening/closing shutter is arranged in the grain drying device. During the discharge operation, the burner is stopped and the grain discharge passage opening/closing shutter is operated to discharge the dried grains to the outside of the machine.

The suction/exhaust fan is also driven during this discharge operation, and the internal air is discharged.

Additionally, a thrower for transporting grain can be connected to the grain drying device. When this grain conveying thrower is connected and driven during discharge operation, the grain discharged from the discharge port is conveyed to a position separated from the machine body.

In this way, the grain drying device is equipped with a plurality of drive parts, each of which is driven by a motor.

In addition, the grain dryer is provided with multiple work selection buttons depending on the operation mode of the grain dryer (drying operation, discharge operation, circulation fan operation, etc.). The motor is selectively driven. Therefore, by arbitrarily selecting and operating these work selection buttons, the grain drying apparatus can be operated in a predetermined operation mode.

By the way, as described above, since a plurality of motors are arranged in the grain drying apparatus, it is necessary to inspect and inspect each motor individually during periodic maintenance and inspection.

In this case, conventionally, each motor was inspected and tested individually (in other words, multiple times) using an ammeter, tester, or the like. Therefore, there was a problem that inspection and inspection required a lot of time and was inefficient. In particular, when an electrical problem occurs in a motor, even if the problem is simple, it is necessary to inspect and inspect all motors to identify the defective motor, which is extremely inefficient. It was bad.

On the other hand, in conventional grain drying equipment, a thermal relay is connected to each motor. Therefore, if an electrical failure occurs in the motors while the grain dryer is in operation, the thermal relays connected to these motors will automatically stop the motors, thereby preventing grain clogging or poor circulation. Overdrying is prevented.

However, such conventional thermal relays are expensive.

In view of the above, the present invention facilitates the inspection and maintenance of multiple motors, and also enables reliable stopping of motors in the event of an electrical failure, as well as low-cost grain drying. The purpose is to obtain equipment.

[Means for Solving the Problem] The grain drying device according to the invention of claim (1) includes a plurality of motors, a work selection button for selecting one of a plurality of set operation modes, and the work selection button. A grain drying apparatus comprising: a drive means for selectively driving the plurality of motors in accordance with an operation mode selected by the grain dryer, the grain drying apparatus comprising: a drive means for selectively driving the plurality of motors in accordance with an operation mode selected by the grain dryer; and a display means for displaying the current value measured by the measuring means.

On the other hand, in the grain drying apparatus according to the invention of claim (2), when the current value measured by the measuring means exceeds the allowable current value of the motor selectively driven by the driving means, control means for stopping the motor that has been
It's even lighter.

[Function] In the grain drying device configured according to claim (1), when the operator arbitrarily selects and operates the work selection button,
One of the plurality of set driving modes is selected. Furthermore, the plurality of motors are selectively driven by the driving means in accordance with the selected operation mode, and the grain drying apparatus is operated in a predetermined operation mode.

During operation of the grain drying apparatus, the current value of the motor selectively driven by the driving means is measured by the measuring means.

Here, when the display means is activated, the current value corresponding to the operating mode measured by the measuring means is displayed.

Therefore, the operator can clearly determine whether the current consumption value of each motor corresponding to each operation mode is normal or not, making it easy to inspect and inspect a plurality of motors.

Further, in the grain drying apparatus configured according to claim (2), when the current value measured by the measuring means exceeds the allowable current value of the motor selectively driven by the driving means, the The motor is stopped by the control means.

Therefore, overdrying due to grain clogging and poor circulation is prevented, and costs are reduced because expensive thermal relays and the like are not used.

[Example] FIGS. 1 and 2 show schematic configuration diagrams of each drive device arranged in a grain drying device 10 according to the present invention, and FIG. 3 shows a perspective view of the entire grain drying device 10. A diagram is shown. Further, a schematic cross-sectional view of the grain drying apparatus 10 is shown in FIGS. 5 and 6.

The body 12 of the grain drying apparatus 10 is shaped like a box that is tall in the top and bottom and long in the front and back. The upper inner cavity of the fuselage 12 serves as a grain tank 14. Furthermore, a drying section 16 is provided at the bottom.

A flow path 18 is formed in the drying section 16, which is partitioned by a porous, mesh-like partition wall, and through which the grains in the grain tank 14 flow. Air guide passages 20 and air exhaust passages 22 are alternately formed between adjacent flow passages 18.

A burner 24 is connected to the air guide path 20, and a suction exhaust fan 27 driven by a motor 26 is connected to the air exhaust path 22, as shown in FIG. Therefore, the hot air generated by the burner 24 is sent to the air guide path 20 and further passes through the downstream path 18 from the air guide path 20 to the air exhaust path 22.
flows to The grains in the flow path 18 are dried by this hot air.

In this embodiment, the motor 26 for driving the suction exhaust fan 27 is
It is a variable pole number changing motor with four poles and six poles that can change the rotation speed by changing the number of poles. These burner 24 and motor 26 are connected to a control panel 48 provided on the front of the body 12, which will be described later.

A shutter drum 30 that is reciprocated by a motor 28 is arranged at the lower end opening of the flow path 18.
8 and the dried grains are fed out. shutter drum 3
A lower screw conveyor 34 driven by a motor 32 is disposed below 0, and conveys the grain fed out by the shutter drum 30 to the front side of the machine body 12.

These motors 28 and 32 are also connected to a control panel 48.

A packet conveyor 36 is erected on the front side of the body 12. Inside this packet conveyor 36, a grain conveying packet 41 is attached to an endless conveyor 39 driven by a motor 38, and the grain sent from the lower screw conveyor 34 can be lifted and conveyed to the top of the machine body 12.

One end of the upper screw conveyor 40 corresponds to the upper end of the packet conveyor 36, and the upper screw conveyor 4
A rotary equalizer 42 is connected to the other end of the rotary equalizer 42 . The upper screw conveyor 40 and the rotary equalizer 42 are driven together with the packet conveyor 36 by a motor 38, and disperse and distribute the grain lifted and conveyed by the packet conveyor 36 to the grain tank 14 of the machine body 12.

A scraper 45 driven by a motor 43 is disposed above the upper screw conveyor 40 and discharges dust in the grains conveyed by the packet conveyor 36 and the upper screw conveyor 40 to the outside of the machine body 12.

A grain discharge path 80 is provided below one end of the upper screw conveyor 40, and an opening/closing shutter 82 driven by a motor 81 (see FIG. 2) is further disposed within the grain discharge path 80. The opening/closing shutter 82 closes the grain discharge path 80 during the grain drying operation, but moves to the state where the grain discharge path 80 is opened during the grain discharge operation so that the grain can be discharged.

A thrower 92 driven by a motor 90 can be connected to the grain discharge path 80, and the grain discharged to the outside of the aircraft via the grain discharge path 80 is transported to a position further away from the aircraft (particularly at a position higher than the aircraft). It can be transported to.

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

In addition, a moisture sensor 44 is installed at the bottom of the packet conveyor 3G.
is arranged so that when the grain conveying packet of the packet conveyor 36 is reversed, a portion of the grain that is turned up flows into the inside.

Inside the moisture sensor 44 is a rotating electrode roll (not shown).
is arranged so that the moisture content can be detected by crushing the incoming grain and measuring the electrical resistance. A moisture sensor 44 is also connected to the control panel 48 .

As shown in FIGS. 3 and 4, a control panel 48 is arranged at the front of the fuselage 12. On the front surface of the control panel 48, work selection buttons such as a loading operation button 49, a blowing operation button 50, a circulation operation button 51, a drying operation button 52, and a discharge operation button 53, and a stop button 54 are arranged. Further, a display section 55 as a display means is arranged on the front surface of the control panel 48, and can display the current value.

FIG. 7 shows a configuration diagram of the control circuit within the control panel 48.

The control panel 48 has a built-in microcomputer 100. The microcomputer 100 includes a CPU 102
, ROMLO4, RAM]06, an input port 108, an output port 110, and a bus 112j connecting these.

In the ROM 104, an operating program to be described later and an allowable current value of the motor that is selectively driven in accordance with the operating mode selected by each work selection button are stored.

The human-powered boat 108 includes an A/D converter 114, an amplifier circuit 116, a rectifier circuit 118, and a current transformer! 20 are connected in series, and the input terminal of the current transformer 120 is connected to one of the three-phase power lines (R phase in the figure). Further, the aforementioned work selection buttons and the stop button 54 are connected to the human-powered boat 108 . When each of these work selection buttons is pressed repeatedly, the motor of each drive device indicated by a circle in Table 1 is selected and driven.

The output port 110 is connected to the aforementioned motors, burner 24 and moisture sensor 44 via a drive circuit 122, and is also connected via a drive circuit 123 to a display section 55 as a display means. 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, and furthermore, this measured current value can be displayed on the display section 55.

Next, the operation of this embodiment will be explained.

When an operator operates the grain drying apparatus 10, the operation mode is set by operating each work selection button provided on the front of the control panel 48, and each drive mode indicated by a circle in Table 1 is set. The motor of the device is driven.

Here, when the loading operation button 49 is operated to load grain, each of the circulation system devices (lower screw conveyor 34, packet conveyor 36, upper screw conveyor 40, rotary equalizer 42) of the grain drying apparatus 10 is operated. The drive motor is driven. The loaded grains are first deposited at the lower center of the machine body 12 (at the location where the lower screw conveyor 34 is installed), and are sequentially transferred to the packet conveyor 3 by the lower screw conveyor 34.
The packet conveyor 36 is transported to the 6 side and further rotates.
The paper is cut into packets and lifted and transported.

The grain lifted and conveyed above the machine body 12 by the packet conveyor 36 is sent to the upper central part of the machine body 12 by an upper screw conveyor 40, and is stored in the grain bin 14 in the machine body by a rotary equalizer 42.

Furthermore, after the completion of tensioning, the drying operation button 52 is operated to drive the motor 28 and rotate the shutter drum 30 to feed out the grain. Then, when the burner 24 connected to the air guide path 20 is ignited and the motor 26 is driven to rotate the suction/exhaust fan 27, the dry air is sucked into the suction/exhaust reed 27 and sent into the air guide path 20. The drying air sent into the air guide path 20 is directly supplied to the grains in the flow path 18.

This is where the grain is dried. The drying air after absorbing moisture from the grains is discharged to the outside of the grain drying device 10 through the exhaust passage 22.

On the other hand, the grain in the flow path 18 is delivered by the rotation of the shutter drum 30 and conveyed across the lower part of the grain drying device 10 in the longitudinal direction, and is again conveyed successively to the packet conveyor 36 side by the lower screw conveyor 34, and then The process is repeated. A portion of the grain that has been made into packets and lifted and conveyed by the packet conveyor 36 is sent to the moisture sensor 4.
4, is crushed by a rotating electrode roll, and the water content is detected by measuring the electrical resistance. Based on the detected moisture content, the above-described circulation process is repeated within the machine body 12 until the grain reaches a 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 a grain discharge operation is performed, and the grains fed out by the rotation of the shutter drum 30 are lifted and conveyed by the packet conveyor 36 again.
The grain discharge path 80 is opened by the rotation of the motor 81, and the grains are discharged from the grain discharge path 80.

Further, in this case, by using the thrower 92, the grain discharged from the grain discharge path 80 can be transported to a position separated from the machine body 12, and the suction and exhaust fan 27 is driven to fill the seats in the machine body 12. Grain discharge operation can be performed without having to do anything.

Here, when the operator starts the operation of the grain drying apparatus 10, the drive current value of the motor of each drive device (indicated by a circle in Table 1) driven by the work selection button may be set as desired. can be displayed. The control routine in this case is shown in FIG. 8(A), FIG. 8(B), and FIG. 9.

When the grain drying lamp 10 is powered on, step 13
0, a constant N is set to a predetermined value (for example, 5), and a variable I that counts the number of times the stop button 54 has been operated is set to 0. Further, in step 136, it is determined whether the variable (2) has reached the constant N. If it has, the flag F is set (1) in step 138, and the process proceeds to step 140. This variable I is incremented at step 134 of the interrupt routine that is interrupted when the stop button 54 shown in FIG. 8(B) is operated.

On the other hand, if the variable count has not reached the constant N in step 136, the flag F is reset (0) in step 139, and then the process proceeds to step 140. Therefore, when a specific button, that is, the stop button 54 is operated multiple times, flag F is set.

In step 140, it is determined whether any work selection button has been operated, and if so, step 1
Operation control is performed at 42.

On the other hand, if none of the work selection buttons has been operated, the process returns to step 136 again.

In the operation control, as shown in FIG. 9, in step 144, the motor of each drive device (preset in correspondence with the work selection button and indicated by a circle in Table 1) is driven to start operation. Furthermore, in step 146, the current value of the driven motor is measured.

Next, in step 148, it is determined whether flag F is set. If the flag F is set in step 148, the process advances to step 150, and the measured current value T of the driven motor is displayed on the display section 55. When displaying, the current value of each driven motor may be displayed, or the motor circuit current value for each driving mode may be displayed.

On the other hand, if the flag F is not set in step 148 (that is, if the stop button 54 has not been operated in a predetermined manner), the process proceeds to step 152 without displaying the measured current value T on the display unit 55. .

In step 152, the allowable current of the motor circuit is 1 [L] stored in the ROM 104 of the microcomputer 100 corresponding to the work selection button determined to be operated in step 140 (for example, each When the motor is driven, a current value corresponding to 1.578 KW is read out, and further, in step 154, it is determined whether the measured current value T exceeds the allowable current value.

If the measured current faiT exceeds the allowable current faL, the process immediately proceeds to step 156, the motor is stopped, and the process ends. On the other hand, in step 154, the measured current 1
If the direct current does not exceed the allowable current value, proceed to step 1.
58, it is determined whether the stop button 54 has been operated. If the stop button 54 has been operated, the process advances to step 156, the motor is stopped, the process is completed, and the stop button 54 is pressed.
If not, the program returns to step 146 and repeats the above-described routine.

In this way, when the operator starts the operation of the grain drying apparatus IO, by operating the stop button 54 (in this embodiment, for example, five or more times), each operation selected by each work selection button is activated. Since the drive current value of the motor of the drive device is displayed on the display unit 55, the operator can clearly determine whether the current consumption value of each motor corresponding to each operation mode is normal or not. Therefore, there is no need to inspect and inspect each motor individually using an ammeter, a desk, etc., and inspection and maintenance and inspection of the motors can be carried out efficiently in a short time.

Further, during operation of the grain drying device 10, if the measured current value exceeds the allowable current value of the motor selectively driven according to the operation mode, a stop signal for the driven motor is issued. The motor will surely stop when the output is output. Therefore, overdrying due to grain clogging and poor circulation is prevented, and furthermore, costs are reduced because expensive thermal relays and the like are not used.

In this embodiment, when the stop button 54 is operated five or more times, the current value of each motor driven by each work selection button or the motor circuit current value for each operation mode is displayed on the display 855. However, the present invention is not limited to this, and the current value of each motor or motor circuit may be displayed on the display section 55 by a predetermined operation of one of the work selection buttons. 55
A dedicated button may be provided to display the information.

[Effects of the Invention] As explained above, the grain drying apparatus according to the present invention facilitates the inspection and maintenance of the plurality of motors, and also ensures that the motors are stopped in the event of an electrical malfunction. It has the excellent effect of being able to be used at a low cost.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the configuration of each drive device arranged in the grain drying device according to the present invention, FIG. 2 is a schematic configuration diagram of each drive device corresponding to FIG. 1, and FIG. 3 is the grain drying device Figure 4 is an enlarged view of the main parts of Figure 3 showing the control panel, Figure 5 is a schematic sectional view of the grain drying device, Figure 6 is Figure 5 Vl-V.
7 is a configuration diagram of the control circuit in the control panel, FIG. 8 (A) is a flowchart showing the control routine for displaying the drive current value of each motor, and FIG. B) is a flowchart showing an interrupt routine that is interrupted when the stop button is operated, and FIG. 9 is a flowchart showing a control routine for operation control. DESCRIPTION OF SYMBOLS 10... Grain drying device, 48... Control panel, 49... Bulging operation button, 50... Ventilation operation button, 51... Circulation operation button, 52... Drying operation button, 53. ...Discharge operation button, 54...Stop button, 55...Display section. Fig. 1 Fig. Fig. Fig. ■ ○ Mill γ ■ G Fig. 8 (A) (B)

Claims (2)

[Claims] (1) A plurality of motors, a work selection button for selecting one of the plurality of set driving modes, and selectively driving the plurality of motors in accordance with the driving mode selected by the work selection button. A grain drying apparatus comprising: a driving means; a measuring means for measuring a current value of a motor selectively driven by the driving means; and a display for displaying the current value measured by the measuring means. A grain drying device comprising: means; (2) A control means for stopping the driven motor when the current value measured by the measuring means exceeds an allowable current value of the motor selectively driven by the driving means. (1) The grain drying device described.