JPH0957129A - Roll clearance control device for paddy sorting machine - Google Patents

Abstract

(57) [Summary] [Construction] A paddy sorting machine having a roll gap adjusting means 24 for opening and closing the gap between a pair of paddy rolls 3, 3 on the basis of a load current value. When the value is higher than the control reference value and the detected load current value of the main motor 44 exceeds the breaker capacity, the frequency of the inverter 25a is adjusted to the increasing side to increase the main motor 44. The roll clearance control device of the hulling and sorting machine, which increases the number of rotations of the hulling machine to increase the peripheral speed of the hulling rolls 3 and 3 to hull the hulling rolls. [Effect] Even when the difficult-to-powder grain or the hulling roll has a small diameter and the dehulling rate is difficult to increase, the frequency of the main motor 44 is increased to increase the hulling rolls 3 and 3. The peripheral speed is increased to increase the removal rate, prevent the load current value from exceeding the breaker capacity, and
It is possible to improve the removal rate while protecting the switch 44.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art In a hulling apparatus composed of a pair of hulling rolls, a hulling roll automatic gap control means for controlling the roll gap on the basis of a load current value is already known.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the conventional apparatus, when opening and closing the roll gap of the hulling roll on the basis of the load current value, when hulling difficult-to-drain kernels, However, there is a problem that the removal rate cannot be increased and the load current value of the motor exceeds the breaker capacity, so that the removal rate cannot be increased.

Therefore, the present invention is intended to solve such a problem.

[0005]

The technical means of the present invention for solving such a technical problem is a pair of hulling rolls 3, 3 for hulling and a hulling roll 3, 3. 3 and a main motor 44 whose rotation speed can be adjusted by the inverter 25a, and a load current sensor 32 for detecting the load current value of the main motor 44.
And a roll gap adjusting means 24 for adjusting the gap between the hulling rolls 3 and 3, and a roll gap adjusting means for adjusting the gap between the roll gap open side and the close side by the roll gap adjusting means 24. Motor 45
And a roll gap control means for controlling the roll gap by outputting an opening / closing command signal to the roll gap adjusting motor 45 on the basis of the load current value, and a roll in the roll gap control means. Of a hull sorter, which comprises a frequency increase adjusting means for changing the frequency of the inverter 25a to an increasing side when the detected load current value exceeds the breaker capacity at the time of outputting the closing clearance adjustment command for the rule gap. The structure of the roll clearance control device is adopted.

[0006]

Operation: During roll clearance control based on the load current value,
The load current value is detected by the load current sensor 32 and compared with the control reference value. When the detected load current value is higher than the control reference value, a roll gap open command signal is issued and the roll gap adjustment mode. The roll gap is adjusted by the controller 45, and
When the detected load current value is lower than the control reference value, a roll gap close command signal is issued, and the roll gap adjustment motor 45 is output.
By this, hulling is performed while the roll gap is closed and adjusted.

During such automatic roll clearance control,
If the detected load current value is lower than the control reference value, the main mode
It is determined whether or not the detected load current value of the inverter 44 exceeds the breaker capacity, and if it exceeds, the frequency of the inverter 25a is changed and adjusted to a predetermined amount increasing side, and the main motor is adjusted. The rotation speed of 44 is increased by a predetermined number, and the peripheral speed of the hulling roll can be increased to hull the hull while increasing the removal rate.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment 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. Reference numeral 4 is a sludge removal unit, in which the sludge from the rice hull portion 1 is wind-selected by the sorting wind generated by the suction dust collector 5 in front, and the light rice husk is sucked by the suction dust collector 5, dust removal. The heavy brown rice and the mixed rice of paddy discharged through the tube 6 to the outside of the machine, and the mixed rice of the heavy brown rice and the paddy rice 7 below
To be sorted. 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.

[0009] 10 is a sorting case, this sorting case 1
The rotary sorting cylinder 11 having a large number of pot holes formed on the inner peripheral surface thereof in 0 has a sorting start side (right side in FIG. 1) and a sorting end side (FIG. 1) so as to rotate around the horizontal axis. The left side in (1) is rotatably supported by the drive rollers 12, 12, .... In the rotary selection cylinder 11, the supply spiral 13
The supply gutter 14 and the brown rice girder 16 which are supported by the brown rice spiral 15 are horizontally laid by the husband and the wife.

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 conveyance 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.

FIG. 2 shows a known roll gap adjusting 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 has an inverter 25a (a main circuit including a forward conversion device unit for converting AC to DC and an inverse conversion device unit for converting DC to AC, and is connected to the forward / inverse conversion device unit. It is composed of the control circuit part.)
Is incorporated, the rotation speed is detected while the main motor 44 is being driven, and the main rotation speed is controlled so that a predetermined rotation speed is maintained. The CPU of the inverter 25a and the C of the control unit 25
It may be shared with PU to be a single one.

A large number of switch groups are connected to the control unit 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.

Pull-off rate upper switch 26, pull-off rate lower switch 27, cylindrical rotation high switch 28, cylindrical 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.

Further, a roll for adjusting the roll clearance between the main motor 44 for driving the grain sorting machine and the grain 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. Further, the control unit 25 includes 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, current display LEDs 51, L.
The ED display device 52 and the buzzer 53 are connected to each other.

Next, the control panel 54 shown in FIG.
Will be described. The control panel 54 includes, for example, a fluorescent display tube type display tube 49 and a cylindrical rotation speed display device 5.
0, current display LED 51, display unit for displaying the presence or absence of paddy in the paddy hopper 2, shutter open / close display unit, roll expansion display unit, LED display unit 52a for displaying the presence or absence of abnormality, whether automatic operation or manual operation LED display section 52b for displaying
LED display 52c for displaying roll expansion, automatic / manual switch 30, take-off rate lower switch 27, take-off rate upper switch 26, cylindrical rotation low switch 29 for lowering and adjusting the number of rotations of the rotary selection cylinder 11, rotation Cylindrical rotation height switch 28 and display changeover switch 31 for increasing and adjusting the rotation speed of the selection cylinder 11.
However, it is provided for each husband and wife.

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. CP
An opening command signal is output from U25 to the shutter opening adjustment motor 46 to set an initial opening for opening the paddy supply adjusting valve 39a to a predetermined valve opening (for example, 10 mm), and the paddying operation is started. It Next, a paddy supply control lever (not shown)
The valve opening adjustment command signal for adjusting to the supply amount adjustment setting position is output, and the paddy supply adjusting valve 39a is changed and adjusted to the position corresponding to the set efficiency valve opening.

Then, the control shifts to the roll clearance control based on the load current value. 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 lower than the control reference value, the frequency of the roll clearance adjusting motor 45 is increased and changed by the control unit of the inverter 25a so that the rotation speed is higher than the reference rotation speed. Then, a predetermined number of rotations is added to change to a higher rotation side than during opening adjustment, and then a close adjustment command signal is output to the roll gap adjusting motor 45, so that the gap between the hulling rolls 3 is closed by a predetermined amount. It is adjusted quickly and returns to the control reference value quickly.

Further, when the detected load current value is higher than the control reference value, the frequency of the roll clearance adjusting motor 45 is decreased and changed by the control unit of the inverter 25a, and the predetermined rotation speed is changed from the reference rotation speed. It has been changed to a lower rotation speed with a reduced number (also
While maintaining the standard rotation speed at a lower rotation speed than during closing adjustment), the controller 25 outputs an opening adjustment command signal to the roll gap adjusting motor 45 to open the gap between the hulling rolls 3 and 3 by a predetermined amount. Slowly adjusted to the side and returned to the control reference value late. 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.

Since the opening / closing control of the roll gap is performed as described above, the adjustment against the grain pressure at the time of the closing adjustment can be made relatively quickly, and the control reference value can be returned quickly.
It is possible to match the quick return to the control reference value by using the grain pressure during opening adjustment, and it is possible to synchronize the opening and closing adjustment. Instead of the roll clearance adjustment control based on the load current value reference, the clearance control of the hulling roll based on the removal rate reference may be performed.

Next, the processing at the start of work using the inverter 25a will be described with reference to FIG. When the hulling operation is started, the changed state is detected by the grain sensor 37 and the shutter sensor 39 of the paddy hopper 2. The grain sensor 37 detects that there is a grain, and the shutter sensor 39
When the change of the paddy supply control valve 39a from the closed state to the open control is detected, it is determined that the initial work has been newly started. Next, the time elapsed from the start of the initial work is timed by a time measuring device (not shown), and it is determined whether or not the operation has shifted to the normal work state after a predetermined time has elapsed. When it is determined that the initial work is started, the inverter 25a is adjusted to the frequency increasing side (for example, 65 hertz), the rotation speed of the main motor 44 is increased, and the entire machine is operated in the increased rotation state. Then, when a predetermined time elapses and then the normal work is started, the frequency is reduced (for example, 64 hertz), and the normal rotation state is restored.

When the main motor 44 is rotated at the normal rotation speed during the initial work, the load at the time of the work disclosure is sharply increased, or the grain is not supplied to the rotary selection cylinder 11 of the mixed rice selection unit, or From the relationship of the small supply state of the grain, the paddy supply control valve 39a of the paddy section 1 is adjusted to the increasing side, the load increases due to the increase in the supply amount, and the rotation speed of the main motor 44 decreases, The removal rate of the scraped rice on the paddy roll is low,
In some cases, the sorting wind in the scraped rice wind sorting section was weakened, and the sorting accuracy deteriorated. However, with the above configuration, such a problem can be solved.

In this embodiment, the timing device determines the end of the initial work, but after the work is started, the layer thickness detection sensor (not shown) of the rotary selection cylinder 11 first detects the predetermined grain layer thickness. In connection with doing, it may be configured to determine that the initial work is completed and to shift to normal work,
It is not limited to this embodiment.

Next, the frequency control of the work end processing by the inverter 25a will be described with reference to FIG. During the hulling / sorting operation, the grain sensor 37 detects the presence or absence of grains in the paddy hopper 2, and the shutter sensor 39 detects the opening / closing of the paddy supply control valve 39a. Then
When the grain sensor 37 detects the absence of grain and the shutter sensor 39 detects the full closure adjustment, it is determined that the work is completed. When it is determined that the work is completed, the frequency of the main motor 44 is decreased by the inverter 25a (for example,
60 Hz), the rotational speed of the main motor 44 is lowered, and after a predetermined time, the run / stop switch 43 is turned off.
Change to F. When the hulling work is temporarily stopped, the hulling work is performed while maintaining the normal frequency (for example, 64 hertz).

Therefore, the rotation drive unit of the whole huller is rotated at a low speed, and the reduced grains from the rotary sorting cylinder 11 are wind-selected by the weak sorting wind of the slid-down rice wind selecting unit 4, and the rotary sorting cylinder 11 is rotated. Reduce the rotation speed and select mixed rice. Therefore, the scattering of paddy / brown rice in the scraped rice wind selecting unit 4 is reduced, and the sorting accuracy can be improved. In addition to the above-mentioned control, if the cylindrical rotation adjusting motor 47 is adjusted to the increasing side by the inverter 25a and only the rotation selecting cylinder 11 is rotated in the normal working state,
The sorting in the rotary sorting cylinder 11 is performed as usual, and the work finishing process can be performed while the sorting efficiency is improved.

Next, with reference to FIG. 8, in the roll clearance control based on the load current value, the control for improving the removal rate of difficult-to-extract grains will be described. During control of the roll gap based on the load current value, the load current value of the main motor 44 is detected by the load current sensor 32, and the power supply voltage sensor 33 detects the power supply voltage. During the control, if it is detected that the detected load current value is higher than the control reference value (or when the roll gap close adjustment command signal is output), it is determined whether the detected load current value is equal to or more than the breaker capacity. When the breaker capacity is exceeded, the frequency of the inverter 25a is increased (for example,
64.5 Hz) is output, the rotational speed of the main motor 44 is adjusted to a predetermined number, and the peripheral speed of the hulling rolls 3 and 3 is increased to hull while increasing the removal rate. . In addition, the flow
In the case where the load current value is lower than the control reference value (the opening control command signal for the roll gap and the adjustment command signal are not output), and the detected load current value is less than the breaker capacity, The main motor 44 is normally rotated at a normal predetermined frequency (for example, 64 hertz).

Since it is constructed as described above, the frequency is raised to increase the hulling roll even when the hard-to-powder grain or the hulling roll has a small diameter and the removal rate is difficult to increase. The removal rate is increased by increasing the peripheral speed of 3 and 3, and the load current value
It is possible to improve the removal rate while preventing the main motor 44 from rising above the capacity and protecting the main motor 44.

Next, the operation of FIGS. 1 and 2 will be described. The paddy placed in the paddy hopper 2 is supplied to the pair of paddy rolls 3 and 3 to be padded. The rice that has been hulled is
The light rice husks are supplied to the lower slide-down rice wind selecting section 4 and are air-selected, and the light rice husks are discharged out of the machine through the suction dust discharger 5 and the dust discharge cylinder 6, and the mixed rice of heavy brown rice and paddy is Lower sliding rice gutter 7
To be sorted. Next, the mixed rice dropped and selected on the scraped rice receiving trough 7 is fried by the mixed rice lifting machine 8 and supplied to the mixed rice hopper 9, and further, the inside of the supply trough 14 is conveyed from the conveyance start end to the conveyance end. It is conveyed toward the section and is supplied to the sorting start end side of the rotary sorting cylinder 11.

The mixed rice fed to the starting side of the rotary sorting cylinder 11 is picked up while being inserted into the pot hole on the inner peripheral surface and scooped up, and the small brown rice is scooped up high and the brown rice gutter 16
The large-sized paddy and a part of the brown rice are scooped up low and dropped into the supply gutter 14. In this way, the brown rice selected by the brown rice gutter 16 is the brown rice gutter 16
The inside is conveyed by the brown rice spiral 15 to the sorting end side of the rotary sorting cylinder 11, and then it is dropped through the brown rice falling cylinder 17 and the brown rice grain plate 18 into the brown rice receiving trough 19 while being wind-selected, and further the brown rice is fried. It is taken out of the machine via the grain machine 20.

The mixed rice dropped into the supply gutter 14 is transported by the supply spiral 13 and supplied to the sorting start end side of the rotary sorting cylinder 11 for re-sorting, and the inside of the rotary sorting cylinder 11 is sorted to the sorting end side. The fluidized and sorted grains fall into the paddy receiving gutter 21 and are further reduced to the paddy rolls 3 and 3 via the paddy grain elevator 22 and the paddy reducing hopper 23, and the paddy is rolled again. It is removed.

[0033]

Since the present invention is configured as described above, even when difficult-to-powder grains or the hulling rolls 3 and 3 have a small diameter, it is difficult to increase the rate of desquamation. , Main motor 44
By increasing the frequency of the paddle, the peripheral speeds of the hulling rolls 3 are increased to increase the removal rate and prevent the load current value from exceeding the breaker capacity. It is possible to improve the removal rate while protecting.

[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 is a flowchart.

FIG. 8 is a flowchart.

[Explanation of symbols]

 1 Hulling part 2 Hulling hopper 3 Hulling roll 4 Sliding rice wind selection part 5 Suction dust collector 6 Dust collector 7 Sliding rice gutter 8 Mixed rice grain hopper 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 falling tube 18 Brown rice grain board 19 Brown rice receiving gutter 20 Brown rice grain grazing machine 21 Paddy receiving gutter 22 Paddy grain grinder 23 Reduction hopper 24 Roll clearance adjusting means 25 Control section 25a Inverter 26 Depth rate upper switch 27 Depth rate lower switch 28 Cylindrical rotation high switch 29 Cylindrical rotation low switch 30 Automatic / manual switch 31 Display change switch 32 Load current Sensor 33 Power supply voltage sensor 34 Power supply frequency sensor (R-T) 35 Power supply frequency sensor (S-T) 36 Signal conversion circuit 37 Glen sensor 38 Roll expansion sensor 39 Series Yatta sensor 39a Paddy supply adjusting valve 40 Rotation sensor 41 Valve opening sensor 42 Scattering sensor 43 Run / stop switch 44 Main motor 45 Roll gap adjusting motor 46 Shatter opening adjusting motor 47 Cylindrical rotation adjusting motor 48 Communication equipment 49 Display tube 50 Cylindrical rotation speed display device 51 Current display LED 52 LED display device 53 Buzzer 54 Control panel 57 EEPROM

Claims (1)

[Claims] 1. A pair of hulling rolls 3, 3 for hulling.
A main motor 44 which drives the hull rolling rolls 3 and 3 and whose rotation speed can be adjusted by the inverter 25a; a load current sensor 32 which detects a load current value of the main motor 44; Roll 3,
3, a roll gap adjusting means 24 for adjusting the gap of No. 3, and the roll.
An opening / closing command signal is output to the roll gap adjusting motor 45 for adjusting the roll gap to the open side or the close side by the roll gap adjusting means 24 and the roll gap adjusting motor 45 based on the load current value. And a roll gap control means for controlling the roll gap, and a detected load current value exceeds the breaker capacity at the time of outputting a roll gap close adjustment command in the roll gap control means. A roll gap control device for a hull sorter, comprising: a frequency increase adjusting means for changing the frequency of the inverter 25a to an increasing side.