JPH09201542A - Control device of hulling sorter - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To efficiently hull even when the power supply voltage drops. A main motor 44 controlled by an inverter 55.
During the hulling work in which the hulling rolls 3 are driven by
The opening / closing control of the roll gap is performed based on the load current value. In addition, during hulling work, the load current sensor 32 detects the load current value, the power supply voltage sensor 33 detects the power supply voltage, and the detected voltage value is greater than or equal to the boundary voltage value. It is determined whether or not there is, and then the correction frequency is determined from the determination information for the boundary voltage value and the detected load current value, the frequency of the inverter 55 is corrected, and the rotation speed of the main motor 44 is controlled. To be done. [Effect] Even when the power supply voltage drops, the rotation speed of the main motor 44 can be maintained at a predetermined rotation speed, and hulling work can be performed efficiently.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a hull sorting machine, which adjusts a gap between hull rolling rolls.

[0002]

2. Description of the Related Art A pair of hulling rolls are driven by a main motor controlled by an inverter, and the frequency of the inverter is controlled in association with a change in load current value of the main motor. However, it is known that the number of revolutions of the main motor is kept constant.

[0003]

In the above-mentioned conventional apparatus, when the power supply voltage drops, the number of revolutions of the main motor decreases, the removal rate decreases, and it is impossible to efficiently hull. I got it. Therefore, the present invention solves the above-mentioned problems and restores the rotation speed of the main motor to a predetermined rotation speed relatively quickly even when the power supply voltage drops to bring it into a normal hulling state. It tries to solve the problem.

[0004]

The technical means of the present invention for solving such a technical problem is a pair of hulling rolls.
A main motor 44 which is controlled by an inverter 55 and drives the hulling rolls 3 and 3, and a load current sensor 32 which detects a load current value of the main motor 44. , A power supply voltage sensor 33 for detecting a power supply voltage, and the hulling roll 3,
Roll gap control means for controlling the opening and closing of the gap of No. 3 on the basis of the load current value or the removal ratio, and the power supply voltage sensor 33.
Voltage drop determining means for determining a voltage drop state from the detected voltage value of the above, and the above-mentioned inverter based on the determination content of the voltage drop determining means and the load current value detected by the load current sensor 32.
The control device of the rice hull sorting machine is composed of an inverter frequency correction means for determining the correction frequency of the switch 55.

[0005]

When paddy is supplied to the paddy rolls 3 and the paddying operation is started, for example, the load current value of the main motor 44 is detected by the load current sensor 33, and the detected load current is detected. The opening / closing control of the roll gap is performed so that the value becomes the reference load current value. During such hulling work, the power supply voltage sensor 33 detects the power supply voltage, the load current sensor 32 detects the load current value, and it is determined whether the detected voltage value is lower than the boundary voltage value. The correction frequency is determined from the judgment information of the voltage drop state with respect to the boundary voltage value and the detected load current value, the frequency of the inverter 55 is corrected based on this, and the rotation speed of the main motor 44 is controlled. It

[0006]

As described above, according to the present invention, depending on the drop state of the detected voltage value, the correction frequency varies depending on the inverter.
The frequency of the motor 55 is corrected and controlled, and the rotation speed of the main motor 44 is controlled. Therefore, even when the power supply voltage drops, the main motor 4
The rotation speed of No. 4 can be maintained at a predetermined rotation speed, the rotation speed of the hulling rolls 3, 3 can be maintained at a predetermined rotation speed, and the hulling work can be performed efficiently.

[0007]

Embodiments of the present invention shown in the drawings will be described below. First, the configuration of the embodiment will be described. First, the overall configuration of a hulling and sorting machine will be described with reference to FIG. Reference numeral 1 denotes a hulling unit. The hulling unit 1 includes a hulling hopper 2, a pair of hulling rolls 3, 3, and the like. Four
Is a slide-down rice wind selection unit, and the slide-down rice from the grain hull portion 1 is wind-selected by the sorting wind generated by the suction dust collector 5 in front.
The light rice husks are discharged to the outside of the machine through the suction dust collector 5 and the dust discharge cylinder 6, and the heavy brown rice and the mixed rice of the rice grains are dropped and sorted into the sliding rice gutter 7 below. The mixed rice dropped and sorted into the slide-down rice receiving gutter 7 is fried by the mixed rice fried machine 8 and is supplied to the conveyance start end portion of the supply gutter 14 on the rotary selection cylinder 11 side through the mixed rice hopper 9. It is a configuration.

Reference numeral 10 is a sorting case, and this sorting case 1
In 0, a rotary selection cylinder 11 having a large number of jar holes on its inner peripheral surface is arranged so that it rotates around the horizontal axis and its selection start side (right side in FIG. 1 (1)) and selection end side. (Fig. 1 (1)
The left side) is rotatably supported by drive rollers 12, 12, .... A supply gutter 14 supported by a supply spiral 13 and a brown rice gutter 16 supported by a brown rice helix 15 are horizontally suspended in the rotary sorting cylinder 11.

When arranging the supply gutter 14 and the brown rice gutter 16 in the rotary selection tube 11, as shown in FIG. 1 (2), the supply gutter 14 is placed on the scraping side of the rotary selection tube 11 and again. The brown rice gutter 16 is disposed on the side of the rotary selection cylinder 11 that rotates downward from above. In this supply gutter 14, the mixed rice of paddy and a part of brown rice scooped up low in the pot hole of the rotary selection cylinder 11 is dropped and sorted, and is further transferred by the supply spiral 13 to the conveying end side of the supply gutter 14. Rotating sorting cylinder 11
The supply gutter 14 also has a function of receiving mixed rice.

The end of the brown rice gutter 16 at the end of transportation is the brown rice falling tube 1
7. It is connected to brown rice gutter 19 through brown rice grain plate 18. The brown rice received by the brown rice gutter 16 is the brown rice falling tube 1
7. The brown rice is passed through the brown rice grain plate 18 and dropped into the brown rice gutter 19 to be selected by air, and is further taken out from the brown rice gutter 19 via the brown rice grain cultivator 20. Rotating sorting cylinder 1
Below the sorting end side of No. 1, a paddy gutter 21 is arranged. A paddy grain hopper 22 is connected to the paddy receiving trough 21, and an upper end of the paddy grain hopper 22 is connected to the paddy reducing hopper 23 of the paddy hull 1. Then, the grain mainly composed of the sorted paddy rice that has flowed to the sorting end side of the rotary sorting cylinder 11 is the paddy receiving gutter 21.
In addition, the grain is dropped to the grain hulling machine 1, the grain-reducing hopper 23, the grain is reduced to the grain-sliding unit 1, and the grain is again grained. It should be noted that the mixed rice sorting unit may be replaced with a rotary grain sorting device, and a swing sorting device type or other system may be used.

FIG. 2 shows a known roll gap control device for adjusting the gap between the hulling rolls 3 and 3. The hulling rolls 3 and 3 are a hulling roll 3 which rotates at a fixed position on the left side, and a right hulling roll 3 which is rotatably supported by a swing arm to be adjusted. It is composed of. Roll clearance control motor 45
Is rotated normally or reversely, the gap between the hulling rolls 3 is adjusted to be opened and closed by the roll gap adjusting means composed of a gear group, an adjusting screw rod, a swing arm, and the like. is there.

Next, FIGS. 3 to 5 will be described. C
The control unit 25 having a built-in PU is connected to an inverter 55 (a main circuit including a forward conversion device unit that converts alternating current to direct current, an inverse conversion device unit that converts direct current to alternating current, and a forward / inverse conversion device unit. Which is composed of a control circuit section that is built in), and the frequency and torque of the main motor 44 and various control motors are changed to increase or decrease the number of revolutions during operation. The main motor is held at a predetermined rotation speed.

A large number of switch groups are connected to the control section 25, and a large number of sensor groups are connected via a signal conversion circuit 36 which is an interface. To 25, a large number of actuator groups and a display device group are connected via an output interface. Next, these connection relationships will be specifically described.

The removal rate upper switch 26, the removal rate lower switch 27, the cylinder rotation high switch 28, and the cylinder rotation low switch 2
9, automatic / manual switch 3 to switch to automatic or manual
0, a load of detecting the load current value of the main motor 44, and a switch group of the display changeover switch 31 for switching and displaying the rotation speed of the rotation selection cylinder 11 and the detected load current value on the cylindrical rotation speed display device 50. Current sensor 32, power supply voltage sensor 33,
A power supply frequency sensor (R-T) 34, a sensor group of a power supply frequency sensor (S-T) 35, a grain sensor 37 for detecting the presence or absence of grains in the paddy hopper 2, and a hulling roll 3, 3
, A roll deployment sensor 38 for detecting a deployment state in which the roll gap is widely opened, a shutter sensor 39 for detecting a fully closed state of the paddy supply control valve 39a, a rotation sensor 40 for detecting the number of rotations of the rotary selection cylinder 11, A valve opening sensor 41 comprising a potentiometer for detecting the opening of the paddy supply control valve 39a,
A sensor group of a transistor-open collector type scattering sensor 42 for detecting the picked-up state of the grain in the rotary selection cylinder 11,
The run / stop switch 43 is connected to each of the control units 25 via the signal conversion circuit 36.

A roll for adjusting the roll clearance between the main motor 44 for driving the hull sorting machine and the hull rolls 3, 3 from the control section 25 via the signal conversion circuit 36. Gap adjustment mode
The motor 45, a shutter opening adjustment motor 46 for adjusting the opening of the paddy supply adjusting valve 39a, a cylindrical rotation adjusting motor 47 for adjusting the rotation speed of the rotary selection cylinder 11, and a communication device 48 are provided. It is connected.

The control unit 25 has a display tube 49 for displaying characters, numbers, etc., a cylindrical rotation speed display device 50 for displaying the rotation speed of the rotation selection cylinder 11, a current display LED 51, an LED.
A display device 52 and a buzzer 53 are connected to each other. Next, the control panel 54 shown in FIG. 5 will be described. The control panel 54 includes, for example, a fluorescent display tube type display tube 49, a cylindrical rotation speed display device 50, a current display LED 51, a display section for displaying the presence or absence of paddy in the paddy hopper 2, a shutter open / close display section, and a roll. Expansion display section / LED display section 52a for displaying the presence / absence of abnormality, LED display section 52b for displaying whether automatic operation or manual operation, LED display section 52c for displaying roll expansion, automatic / manual switch 30, removal Rate down switch 27, removal rate up switch 26,
A cylindrical rotation low switch 29 for lowering and adjusting the rotation speed of the rotation selection cylinder 11, a cylindrical rotation high switch 28 for increasing and adjusting the rotation speed of the rotation selection cylinder 11, and a display changeover switch 31 are provided respectively.

Next, the control contents of the CPU 25 will be described. First, the automatic / manual switch 30 is selected on the automatic side, and the run / stop switch 43 is operated on the run side. Then, the main motor 44 is turned on to drive the rotating parts of the paddy hull sorting machine. Next, the initial gap setting control for setting the initial gap between the hulling rolls 3 and 3 is performed. A roll gap opening command signal from the CPU 25 is output to the roll gap adjusting motor 45, and the roll gap adjusting means 24 is driven to open for a predetermined time.
When the clearance between the hulling rolls 3 is adjusted and the load current sensor 31 detects the non-contact state of the hulling roll in which the detected load current value does not change, the opening adjustment is stopped. Then,
A close command signal for the roll gap is output, the roll gap is closed and adjusted, and the load current sensor 32 detects an increase in the load current value.
When the slight contact between the hulling rolls 3 and 3 is confirmed, the closing adjustment is stopped. Then, an opening command signal for the roll gap is output, and the roll gap adjusting motor 45 is opened for a predetermined time.
The adjustment setting is made to a predetermined initial gap (for example, 1 mm). Next, the shutter opening initial setting control for adjusting the initial opening of the paddy supply adjusting valve 39a is performed. An open command signal is output from the CPU 25 to the shutter opening adjustment motor 46,
Set the paddy supply control valve 39a to a predetermined valve opening (for example, 10 mm)
The initial opening is set so that the hulling work is started.

Next, a valve opening adjustment command signal for adjusting the supply amount adjustment setting position of a paddy supply adjusting lever (not shown) is output, and the paddy supply adjusting valve 39a is moved to a position corresponding to the set efficiency valve opening. Change adjusted. Next, the control shifts to the roll clearance control based on the load current value reference. Then, the detected load current value of the load current sensor 32 is sent to the control unit 25, and the control reference value and the detected load current value are compared. When the detected load current value is higher than the control reference value, the controller 25 outputs an open command signal to the roll gap adjusting motor 45 to adjust the gap between the hulling rolls 3 and 3 to the open side by a predetermined amount. If the detected load current value is lower than the control reference value, a close command signal is output,
The gap between the hulling rolls 3 is closed by a predetermined amount, and returns to the control reference value. Further, if the detected load current value is within the range of the control reference value, the control command signal is not issued and the hulling operation is performed while maintaining the roll gap as it is.

Instead of the roll clearance adjustment control based on the load current value, the clearance control of the hulling roll based on the removal rate may be performed. Next, an example of the control shown in FIGS. 6 and 7 will be described. In this embodiment, when the rotation speed of the main motor 44 is controlled by the inverter 55, the rotation speed of the main motor 44 is kept substantially constant even if the power supply voltage drops, and the hulling roll 3 is used. , 3 while keeping the number of rotations constant, and trying to hull while maintaining a predetermined removal rate.

When the power switch is turned on, initial processing is performed and the inverter 55 is in a waiting state for operation.
Next, the power source frequency sensor (T-R) 34 and the power source frequency sensor (S-T) 35 detect the frequency, and
The power supply frequency of 0 hertz or 60 hertz is determined.
Next, it is determined whether or not the run / stop switch 43 is turned on, and when the run / stop switch 43 is turned on to enter the running state, the inverter 55 is driven (at the frequency of 59 hertz in the no-load state by the table in FIG. 7 described later). The main motor 44 is driven, the load current sensor 32 reads the load current value, and then the power supply voltage sensor 33 reads the power supply voltage.

Next, the frequency correction of the inverter 55 based on the detected load current value and the detected power supply voltage value is performed as follows. Regarding the detected power supply voltage value, for example,
When the commercial power supply voltage is 200 V, the reference boundary value is set to 190 V and the voltage drop state is determined (the boundary reference value 190 V is provided with a dead band of ± 2 V, and the detected voltage value is Is determined to be either up or down,
The boundary reference value is changed according to the motor characteristics. Next, the correction frequency is determined based on the table of FIG. 7 from the determination of the drop state of the detected voltage value and the detected load current value. Then, when the main motor 44 is in a no-load state of 3.5 to 4.5 amperes, the inverter 55 is corrected at the same frequency of 59 Hz even at 190 V or less or 190 V or more, and the main motor 44 is corrected. The rotation speed of the motor 44 is adjusted, and then the paddy supply control valve 39a is opened to start paddy sorting control.

Next, as the load current value of the main motor 44 increases during hulling work, the correction frequency is determined based on the table of FIG. 7 according to the drop state of the power supply voltage and the load current value. , The frequency of the inverter 55 is corrected and controlled. Therefore, even if the load current value changes during the hulling work at the time of voltage drop, the rotation speed of the main motor 44 is kept substantially constant,
By optimizing the number of rotations of the hulling rolls 3 and 3, hulling work can be performed at a predetermined removal rate.

In this embodiment, the correction frequency is selected by the table, but the correction frequency is determined by a predetermined calculation formula from the reference voltage value, the detected voltage value and the detected load current value. Good. In performing the correction control, the power source voltage is detected in association with the start of driving of the main motor 44, and the voltage drop state is determined by 19
If the voltage drop condition is determined and the inverter 55 is corrected in connection with detecting 0 V or less or 190 V or more a predetermined number of times within a predetermined time, hunting that repeatedly increases and decreases the number of revolutions is prevented. it can.

Next, the embodiment shown in FIG. 8 will be described. This control is performed by the main motor by the above-mentioned inverter 55.
In the control for correcting the rotation speed of the rotor 44, when adjusting the gap between the hulling rolls 3 and 3 on the basis of the load current value,
It is intended to accurately control the roll gap opening at the time of overload. Similar to the above embodiment, when the power switch is turned on, the initial process is performed, and then the frequency is detected by the power frequency sensor (T-R) 34 and the power frequency sensor (S-T) 35, and the frequency is 50 Hz. The power supply frequency of 60 Hz is determined. Next, when the operation / stop switch 43 is turned on to start the operation, the inverter 5
5, the main motor 44 is driven, the load current value and the power supply voltage are detected, and the frequency of the inverter 55 is corrected based on the power supply voltage.

Next, the initial clearance setting control of the above-mentioned paddy roll is performed, the paddy supply control valve 39a is opened, and the paddy sorting control is started. During hulling work, the load current value is detected every predetermined time, the detected load current value is compared with the reference overload current value, and if the detected load current value exceeds the reference value, the opening control of the roll gap is performed. Overload control is performed.
The reference overload current value is configured such that its control reference value is corrected in relation to the correction of the power supply voltage. That is, the power supply voltage is set to 19 in correspondence with the correction frequency table.
When 0 volt or more is set to a reference value larger than that when the voltage is 190 volt or less. Therefore, even when the power supply voltage drops, the overload current value control becomes accurate, and the hulling operation can be performed while preventing the brown rice from rubbing the skin and reducing the removal rate.

[Brief description of drawings]

FIG. 1 is a cut side view and a cut back view of a hulling sorter.

FIG. 2 is a cutaway side view of a main part.

FIG. 3 is a block diagram.

FIG. 4 is a block diagram.

[Figure 5] Front view of the panel

FIG. 6 is a flowchart.

FIG. 7 Table

FIG. 8 is a flowchart.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Paddy hull part, 2 ... Paddy hopper, 3 ... Paddy roll, 4 ... Sliding rice wind selection part, 5 ... Suction dust collector, 6 ... Dust collecting pipe, 7 ... Sliding rice gutter, 8 ... mixed rice fried machine, 9 ... mixed rice hopper, 10 ... sorting case, 11 ... rotating sorting cylinder, 12 ... drive roller, 13 ...
Supply spiral, 14 ... Supply gutter, 15 ... Brown rice spiral, 16 ...
Brown rice gutter, 17 ... Brown rice flowing down tube, 18 ... Brown rice flowing grain plate, 19 ...
Brown rice receiving trough, 20 ... Brown rice lifting machine, 21 ... Paddy receiving trough, 22 ... Paddy lifting machine, 23 ... Paddy reduction hopper, 24 ... Roll gap adjusting means, 25 ... Control part, 26 ... Depulling rate Switch, 27 ... Removing rate lower switch, 28 ... Cylindrical rotation high switch, 29 ... Cylindrical rotation low switch, 30 ... Automatic / manual switch, 31 ...
Display changeover switch, 32 ... Load current sensor, 33 ... Power supply voltage sensor, 34 ... Power supply frequency sensor (RT), 35
... power frequency sensor (ST), 36 ... signal conversion circuit,
37 ... Glen sensor, 38 ... Roll expansion sensor, 39 ...
Shutter sensor, 39a Paddy supply control valve, 40 ... Rotation sensor, 41 ... Valve opening sensor, 42 ... Scattering sensor, 43 ...
Run / stop switch, 44 ... Main motor, 45 ... Roll clearance adjusting motor, 46 ... Shutter opening adjusting motor, 47 ...
Cylindrical rotation adjustment motor, 48 ... communication equipment, 49 ... display tube,
50 ... Cylindrical rotation speed display device, 51 ... Current display LED, 5
2 ... LED display device, 53 ... buzzer, 54 ... controller
Lupanel, 55 ... Inverter

Claims (1)

[Claims] 1. A pair of hulling rolls 3, 3 and an invertor.
A main motor 44 which is controlled by a motor 55 and drives the hulling rolls 3 and 3, a load current sensor 32 which detects a load current value of the main motor 44, and a power supply voltage which detects a power supply voltage. A sensor 33, a roll gap control means for controlling opening / closing of the gap between the hulling rolls 3 and 3 on the basis of a load current value or a depletion rate, and a voltage drop from a detected voltage value of the power supply voltage sensor 33. Voltage drop determining means for determining the state, and inverter frequency correcting means for determining the correction frequency of the inverter 55 based on the content of the voltage drop determining means and the load current value detected by the load current sensor 32. The control device of the paddy hull sorting machine.