JP2000126622A - Roll clearance controller of hulling rolls - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify structure to contrive lowering cost by effectively using the detecting function of a load current value incorporated into an inverter to automatically control a roll clearance of hulling rolls. SOLUTION: Hulling rolls are driven by a main motor 38 with an inverter 37 to do hulling and sorting work, and a load current value of the main motor 38 is detected by a load current detecting function incorporated into the inverter 37, and this detected load current value and a reference load current value are compared. When the detected load current value is higher (or lower) than the reference load current value, a roll clearance control motor 29 is subjected to opening control (or closing control) to relatively control a roll clearance of hulling rolls so that the detected load current value is reset in the range of the reference load current value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a roll clearance control device for a hulling roll.

[0002]

2. Description of the Related Art As shown in FIG.
The inverter 37 has a load current value detection function.
The control unit 31 is also provided with a load current sensor for detecting the load current value of the main motor 38, and the automatic adjustment of the roll gap of the hulling roll is performed based on the detected load current value of the load current sensor. .

[0003]

In the conventional apparatus, it is necessary to provide the control unit 31 in the middle of the inverter 37 and the main motor 38, the connection line to the main motor 38 becomes long, and the detection unit of the load current value is not provided. It becomes plural and the configuration becomes complicated,
There is a problem that the harmonic noise of the inverter 37 adversely affects other sensor signals.

Accordingly, the present invention is to solve such a disadvantage while simplifying the configuration.

[0005]

Means for Solving the Problems The technical means of the present invention for solving such a technical problem is a hulling roll 7,
7, a main motor 34 with an inverter 37 for driving the hulling roll 7, a roll gap adjusting means for adjusting the roll gap between the hulling rolls 7, 7, and the hulling roll 7 based on the load current value detected by the load current value detection function of the inverter 37. And automatic roll gap adjusting means for automatically adjusting the gap between the rolls, and a rice feed adjusting valve 2 for adjusting the amount of grain supplied to the hulling rolls 7, 7
8 and a roll gap control device for the hulling roll, comprising a paddy supply control valve opening sensor 34 for detecting the valve opening of the paddy supply control valve 28.

[0006]

The hulling rolls 7, 7 are driven by the main motor 38 with the inverter 37 to perform the hulling sorting operation. During the operation, the load current value of the main motor 38 is detected by using the load current value detection function built in the inverter 37, and the valve opening of the rice supply control valve 28 is detected by the rice supply control valve opening sensor 34. Based on these detected values, the reference load current value for the automatic adjustment of the roll gap corresponding to the opening degree of the paddy supply control valve 28 is calculated and determined, and the reference load current value is compared with the detected load current value. When the load current value is higher (or lower) than the reference load current value, the roll gap adjustment motor 29 is opened (or closed) and the detected load current value is returned to the range of the reference load current value. The roll gap between the hulling rolls 7, 7 is adjusted.

[0007]

According to the present invention, as described above, the roll gap between the hulling rolls 7, 7 can be automatically adjusted by effectively utilizing the load current value detection function built into the inverter 37,
Unlike the conventional device, there is no need to provide a special load current value detection sensor for control, and cost reduction can be achieved.
The control accuracy can be improved.

[0008]

Embodiments of the present invention shown in the drawings will be described below. First, the overall configuration of a hulling sorter will be described with reference to FIG. The rice hulling sorter is a rice hulling unit 1 and a rice hulling unit 2 that wind-selects the rice hulled from the rice hulling unit 1. It comprises an oscillating sorting section 3 for separating and sorting brown rice, a mixed rice frying machine 4, a brown rice thrower 5, and the like.

The hulling unit 1 includes a hulling hopper 6, a hulling roll 7,
The hulling room 8 is provided with an interior such as 7. The sliding rice-style selection unit 2 includes a sliding rice-style selection box 9, a sliding rice-style selection path 10,
It is composed of a pity receiving trough 11, a sliding rice trough 12, a suction fan 13, a dust tube 14, and the like. Next, the swing sorting unit 3 will be described. The multi-stage swing sorting plates 15, 15,... Are provided with sorting irregularities on the plate surface, one side in the vertical direction is a high supply side, the other side is a low discharge side, and one side in the horizontal direction is a low supply side. The swinging plate 15 is tilted in both the vertical and horizontal directions, and the swinging plate is reciprocated up and down diagonally in the horizontal direction by a swinging device.

At the supply port on the supply side of the oscillating sorting plate 15, mixed rice is fed through a sliding rice receiving gutter 12, a mixed rice fryer 4, a mixed rice hopper 24, a distribution supply gutter 16 and a distribution case 17. It is a configuration that is supplied. The mixed rice supplied to the swing sorting plate 15 is sorted according to the relationship between the size of the grain shape, the size of the specific gravity, the size of the friction coefficient, and the like. The light paddy is unevenly distributed on the lower side in the horizontal direction, and mixed rice that is not separated is unevenly distributed in the middle part,
These grains are separated by a brown rice partition plate 18 and a paddy partition plate 19 provided on the discharge side of the swing sorting plate 15.

The brown rice separated by the brown rice partition plate 18 is taken out of the machine through a brown rice extraction gutter 20, a brown rice flow path 21, and a brown rice thrower 5, and mixed rice is mixed rice extraction gutter 22, a mixed rice flow path. 23, sliding rice receiving gutter 12, mixed rice fryer 4, mixed rice hopper 24, distribution supply gutter 16, distribution case 17,
The paddy is again supplied to the rocking sorter plate 15 and re-sorted, and the paddy is returned to the paddy unit 1 through the paddy discharge gutter 25, the paddy channel 26, and the paddy machine 27, and is again padded. Is performed.

Although illustration is omitted, the mixed rice hopper 2
4 and the hulling supply control valve 28 of the hulling unit 1 are interlockingly connected via an interlocking member such as a link, and when the mixed rice hopper 24 moves down or up due to an increase or decrease in the amount of grain, the hulling supply control valve. Numeral 28 is a configuration which is related to the decreasing side or the increasing side. FIG. 2 shows a well-known roll gap adjusting device for opening and closing the roll gap between the hulling rolls 7, 7. When the roll gap adjusting motor 29 is rotated forward / reverse, the paddy is adjusted via the roll gap adjusting means 30. The roll gap between the sliding rollers 7, 7 is adjusted to open and close.

Next, the input configuration of sensors and switches to the control unit 31 built in the microcomputer and the connection configuration of the actuator will be described with reference to FIG. The control unit 31 provided in the control box includes:
A grain sensor 33 for detecting the presence or absence of grains in the rice hopper 6,
The paddy supply control valve opening degree sensor 34 for detecting the valve opening degree of the paddy supply control valve 28, the load current sensor 39 for detecting the load current value of the main motor 38, and the operation / stop switch 36 are connected via an input interface. Each one is connected.

The control unit 31 has a main motor 38 with an inverter 37 and a paddy supply control valve 2 via an output circuit.
A paddy supply control valve adjustment motor 41 and a roll gap adjustment motor 29 for adjusting the opening degree of 8 are connected, and a display 40 is connected via an output circuit. Thus, for example, a single-phase 200 volt commercial power supply is supplied to the main motor 38 via the inverter 37, and the load current value on the output side of the inverter 37 is detected by the load current sensor 39 and displayed on the display 40. Configuration.

Next, the control contents of the control unit 31 will be described. (1) When the control starts, the run / stop switch 36
When the presence / absence of ON / OFF input is detected and the ON input of the operation / stop switch 36 is detected, the initial roll gap adjustment setting of the hulling rolls 7, 7 is executed. The initial roll gap adjustment setting is performed, for example, as follows. First, the roll gap is opened, and when the detected load current value of the load current sensor 39 does not change, it is determined that the hulling rolls 7 and 7 are not in contact, and the opening adjustment is stopped, and then the roll gap is closed. When the load current sensor 39 detects an increase in the load current value and determines that the hulling rolls 7 and 7 are in slight contact with each other, the closing adjustment is stopped, and then the roll gap is opened and adjusted for a predetermined time. The initial gap (for example, 1 mm) is adjusted and set.

(2) When the initial setting of the roll gap is completed, the process then proceeds to roll gap control based on the load current value. After shifting to this control, a predetermined time (for example, 5
In the meantime, the process shifts to the work stabilization waiting process, during which the opening and closing adjustment of the roll gap of the hulling rolls 7, 7 is stopped, and the hulling operation is performed with the roll gap in a fixed state. When the predetermined time is over, the opening degree of the paddy supply control valve 28 is detected by the paddy supply control valve opening sensor 34 and sent to the control unit 31, and the reference load corresponding to the valve opening degree of the paddy supply control valve 28 is detected. The current value is calculated and determined by a predetermined formula. Next, the load current sensor 3
The detected load current value 9 is compared with the reference load current value. If the detected load current value is higher (or lower) than the reference load current value, the roll gap adjusting motor 29 is opened (or closed). Then, the roll gap is adjusted so that the detected load current value returns to the range of the reference load current value.
If the detected load current value is within the range of the reference load current value, the control command is not issued and the hulling operation is continued while maintaining the roll gap as it is.

(3) Next, the embodiment shown in FIGS. 4 to 6 will be described. In this embodiment, an inverter 37 starts output to the main motor 38 when a power switch (for example, a breaker) 42 is turned on, and stops output to the main motor 38 when the power supply voltage drops. The present invention relates to an ON / OFF configuration of a main motor 38 with an inverter in a hulling sorter including a power switch (breaker) 42 with an undervoltage trip device 43 for turning on / off the power supply.

As shown in FIG. 4, the conventional device includes a power switch (breaker) 4 for turning on / off the power of the inverter 37.
2. A run / stop switch 36 for turning on / off the main motor 38 and an on / off operation of the run / stop switch 36
The main motor 38 is started or stopped by a signal. Therefore, as shown in the time chart of FIG.
Is turned on, the inverter 37 outputs and the main motor 38 is driven. When the operation / stop switch 36 is turned on next, the main motor 38 stops. When a power failure occurs, the main motor 38 stops, and when the power failure recovers, the inverter 37
Is reset and the main motor 38 is not started without permission.

In this embodiment, as shown in FIG. 5, when the power switch (breaker) 42 is turned on, the inverter 37 is turned on.
Starts output to the main motor 38, and a power switch (breaker) 42 is provided with an undervoltage trip device 43 for turning off the power supply when the power voltage drops to a predetermined value.
When the power supply voltage drops to a predetermined value, the inverter 37
And the main motor 38 is stopped by stopping the inverter 37.

Therefore, as shown in the time chart of FIG. 6B, when the power switch (breaker) 42 is turned on, the power is supplied to the inverter 37 to start the main motor 38, and the power switch (breaker) is turned on. 42 OFF
By the operation, the power supply to the inverter 37 is stopped and the main motor 3
8 stops. Then, when a power failure occurs, the power supply to the inverter 37 is stopped and the main motor 38 is stopped, and the undervoltage trip device 43 is operated to turn off the power switch (breaker) 42, and the power supply to the inverter 37 is stopped. Even if the power is turned off and the power failure is recovered, the main motor 38 does not rotate without permission.

Accordingly, the number of components can be reduced while simplifying the operation, and cost reduction and reliability improvement can be achieved. Next, an embodiment shown in FIG. 7 will be described. In this embodiment, as shown in FIG. 7, ON / OFF of a power switch (for example, a breaker) 42 attached to a hulling sorter.
The main motor 38 is turned ON / OFF by operation, and the power switch 4
2 is provided with an undervoltage trip device 43 that is turned off when the power supply voltage drops to a predetermined value. The undervoltage trip device 43 is operated by a relay 44 that can be controlled by the control unit 31, and the power switch 42 is turned on. Is turned on / off.

In the conventional device, the main motor is turned on / off by an electromagnetic switch and a push button switch, and a relay controllable by a control unit is connected to an OFF switch line of the push button switch. . Therefore, as the size of the large main motor increases, the capacity of the electromagnetic switch increases and the cost increases. However, with the above-described configuration, at the time of automatic stop, the relay 44 is turned on by a command from the control unit 31, the supply of power to the undervoltage trip device 43 is stopped, and the power switch 42 is turned off.

When the power supply is turned off due to a power failure,
The power supply to the undervoltage trip device 43 is cut off, and the power switch 42 is turned off. For this reason, even if the power failure recovers, the main motor 38 does not rotate without permission, which is safe. Next, the embodiment shown in FIGS. 8 and 9 will be described. As shown in FIG. 8, when the power switch (breaker) 42 with the undervoltage trip device 43 is turned ON / OFF, the main motor 38 is turned ON.
And a load current sensor 39 for detecting a load current value of the main motor 38 are input to the control unit 31. The power supply voltage detection sensor 45 for detecting the power supply voltage and the load current sensor 39 for detecting the load current value of the main motor 38 are input to the control unit 31. When the detected voltage value is equal to or lower than the tripping operating voltage of the undervoltage trip device 43 and the load current value of the main motor 38 becomes substantially 0 ampere, the power supply voltage switch (breaker) 42 due to a low voltage or an instantaneous power failure is activated. Judge as OFF and display 40
This is a hulling sorter that is configured to indicate so.

In the conventional apparatus, there is no function of notifying the stop of the main motor 38 due to a drop in power supply voltage or an instantaneous power failure, and it is not clear why the motor stopped, and it sometimes takes time to find out the cause. However, in this embodiment, FIG.
As shown in the flowchart, when the control is started, the detected load current value of the load current sensor 39 is compared with the reference drive value,
ON / OFF of the main motor 38 is determined, and the main motor 38O
In the case of FF, it is detected again and compared. When the main motor 38 is ON, the detected voltage value of the power supply voltage detection sensor 45 is compared with the reference trip voltage value of the undervoltage trip device 43. By comparing the current value with the reference drive value, the ON / O of the main motor 38 is determined.
The FF is determined, and when the main motor 38 is OFF, the display 40 indicates that the operation is stopped based on a drop in the power supply voltage, and when the main motor 38 is ON, the process returns.

In this embodiment, since the stop of the main motor 38 due to the decrease in the power supply voltage or the instantaneous power failure can be known from the display as described above, the drawbacks of the conventional device can be eliminated, and the cause of the main motor 38 OFF can be quickly identified. , It is possible to quickly respond to the start. Next, an embodiment shown in FIG. 10 will be described. In this embodiment, the inverter 37
The hulling rolls 7, 7 are driven by a main motor 38, and the inverter 37 is of a general purpose type, and outputs a detected load current value to the outside as a 0 to 5 volt signal or a frequency-converted pulse signal. It has a function that can do it.

The control unit 31 is configured to receive the load current value detection output of the inverter 37 and connect other sensors and actuators such as the roll gap adjusting motor 29 to connect the load current of the main motor 38. Inverter 37
And the roll gap between the hulling rolls 7 is controlled based on the load current value in the same manner as in the above embodiment.

[0027] As shown in FIG.
The main motor 3 is connected to the inverter 37 and the control unit 31 respectively.
8 and a large number of sensors and actuators are connected to the control unit 31. Therefore, it is necessary to provide the control unit 31 in the middle of the inverter 37 and the main motor 38, the connection line to the main motor 38 becomes long, and the harmonic noise of the inverter 37 adversely affects other sensor signals, Although the detected load current value of the control unit 31 is not overloaded due to the difference between the detected load current value of the unit 31 and the detected load current value of the inverter 37, the inverter 37 uses its own detected load current value to control the main motor 38. Corrected overload, sometimes resulting in insufficient horsepower.

This embodiment eliminates such a drawback of the conventional device by effectively utilizing the load current value detection function of the inverter 37, and further eliminates the need for a special load current value detection unit. The cost can be reduced. When displaying the load current value and the overload operation display on the display 40 by the signal from the control unit 31,
7 may be configured to output based on the load current value detection function.

[Brief description of the drawings]

FIG. 1 is an overall cut side view.

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

FIG. 3 is a block diagram.

FIG. 4 is a block diagram.

FIG. 5 is a block diagram.

FIG. 6 is a time chart.

FIG. 7 is a block diagram.

FIG. 8 is a block diagram.

FIG. 9 is a flowchart.

FIG. 10 is a block diagram.

[Explanation of symbols]

1 ... rice hulling part, 2 ... rice crushing rice selection part, 3 ... rocking sorting part, 4 ...
Mixed rice fryer, 5 ... Brown rice thrower, 6 ... Rice hopper, 7 ...
Rice hulling roll, 8… Hulling room, 9… Sliding rice style selection box, 10…
Sliding rice-style path, 11: Pity trough, 12: Sliding rice trough, 13
... Suction fan, 14 ... Dust tube, 15 ... Swing sorting plate, 16
... Distribution supply gutter, 17 ... Distribution case, 18 ... Brown rice partition plate,
19: paddy partition plate, 20: brown rice extraction gutter, 21: brown rice channel,
22 ... mixed rice extraction gutter, 23 ... mixed rice channel, 24 ... mixed rice hopper, 25 ... paddy extraction gutter, 26 ... paddy channel, 27 ... paddying machine, 28 ... paddy supply control valve, 29 ... roll gap Adjustment motor, 30: roll gap adjusting means, 31: control unit, 33 ...
Glen sensor, 34 ... Rice supply control valve opening degree sensor, 36 ...
Start / stop switch, 37 inverter, 38 main motor, 39 load current sensor, 40 indicator, 41 paddy supply control valve adjustment motor, 42 power switch, 43 undervoltage trip device, 44 ... Relay, 45 ... Power supply voltage detection sensor.

Claims (1)

[Claims] 1. A main motor 34 with an inverter 37 for driving the hulling rolls 7, 7; a roll gap adjusting means for adjusting a roll gap between the hulling rolls 7, 7; A roll gap automatic adjusting means for automatically adjusting the roll gap between the hulling rolls 7, 7 based on the detected load current value; a hulling supply control valve 28 for adjusting the amount of grain supplied to the hulling rolls 7, 7; Paddy supply control valve opening degree sensor 34 for detecting the valve opening degree of paddy supply control valve 28
And a roll gap control device for the hulling roll.