JP3184596B2 - Hulling machine control system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is to maintain a screwing rate by keeping a motor load current value for driving a pair of screwing rolls constant, that is, to adjust a roll gap so as to reach a control target current value. The present invention relates to a husking rate control device for a huller.

[0002]

2. Description of the Related Art Conventionally, there has been a technique in which a control target current value at the time of interruption of work is stored and held, so that the stored current value is used at the time of restarting work so that the same failure rate as before the interruption of work is achieved.

[0003]

The above-mentioned prior art has a great merit that it is not necessary to reconfirm and readjust when the work is resumed by storing and holding the control target current value when the work is interrupted. Even if the current value is the same between when the work is interrupted and when the work is restarted, if the power supply voltage changes or if the amount of milled rice is different, the same loss rate will never be obtained, and the storage current The value may be different from the actual condition, and there was a possibility of malfunction.

[0004]

According to the present invention, there is provided an apparatus for maintaining a failure rate by maintaining a constant motor load current value for driving a pair of failure rolls. Means for storing and holding the values of the power supply voltage of the motor and the amount of milled rice, which is the amount of paddy supplied to the milling roll, to store the stored current value, the stored power supply voltage, and the stored amount of milled rice when the work is resumed. And measures to prevent malfunctions when the power supply voltage changes or when the amount of milled rice differs between when the work is interrupted and when the work is restarted. .

When the work is resumed, the stored current value becomes abnormal.
Means for determining whether or not the stored power supply voltage value and the stored rice milling amount are the same as the current power supply voltage value and the rice milling amount, and the storage current value is an abnormal value. ,
Or, when the stored power supply voltage value is different from the current power supply voltage value,
Or, when the storage sliding rice amount is different from the current sliding rice amount is
By controlling to the current value of the specified motor load factor, when the power supply voltage changes, when the work is interrupted and when the work is restarted, or when the amount of milled rice is different, or the stored current value Is prevented from malfunctioning when it is different from the actual state, and more stable hulling performance is obtained.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a circuit diagram for controlling the husking rate, and FIG. 2 is an overall sectional view of the huller. In the figure, (1) is a hulling unit, (2) is a hopper for charging the hull, (3) and (4) are a pair of removal rolls provided below the hopper (2), and (5) is A rice milling amount control valve for adjusting the supply amount of paddy to the rolls (3) and (4), (6) is a shutter for opening and closing the lower part of the hopper (2), and (7) is the removal rolls (3) and (4). ) Is a loss rate motor for adjusting the gap, and is configured to continuously remove rice.

[0007] Further, in the figure, (8) is a wind selection unit on which the hulling unit (1) is mounted. A machine case (9) forming the wind selection unit (8) and a brown rice extraction gutter (10). And brown rice conveyor (1
1), a small rice take-out gutter (12) and a small rice receiver (13) for carrying small rice separated from brown rice falling on the gutter (10) outside the machine, a grain scattering plate (14) and a drifting plate ( 15)
The rice removal gutter (16) which faces down to the removal rolls (3) and (4) and receives the rice (brown rice and paddy)
And a polished rice conveyor (17), a pity extraction gutter (18) and a pity receiver (1) for receiving pity separated from the polished rice.
9) and an air suction / discharge fan (20) for discharging the rice husks separated from the crushed rice to the outside of the machine, so as to separate the rice husks from the crushed rice.

In the drawing, reference numeral (21) denotes a sorting unit which is mounted on the wind sorting unit (8) and juxtaposed to the hulling unit (1), and is continuously rotated in one direction to slid down the rice into brown rice and paddy. Sorting cylinder to be separated (2
2), a sorting motor (24) for rotating the drum (22) in one direction via bearing rolls (23), and a supply gutter (25) and a feeding conveyor (25) inserted into the sorting drum (22). 26), brown rice gutters (27) and brown rice receiving conveyors (28) juxtaposed therewith, and paddy scooping vanes (29) provided at the sorting end inside the sorting cylinder (22).
A return paddy return gutter (30) for sending the paddy picked up by the blades (29) to the hopper (2), and a chute (31) for connecting the end of the brown rice receiving conveyor (28) to the brown rice extraction gutter (10). In preparation, it is configured to separate the rubbed rice into brown rice and paddy and take out each one.

Then, a brown rice lifter (32) for communicating the lower end to the brown rice conveyor (10), and a lower end to the sliding rice conveyor (17) for feeding the upper end to the supply conveyor (26). A rice hulling motor (34) that stands up along with the outside of the housing (9) with a rubbed rice lifting sloucher (33) facing the start end, and drives each of the parts (1), (8), (21). Is arranged.

[0010] As shown in Fig. 3, the removal rolls (3) and (4) are arranged in a hulling case (36) which communicates with a lower part of a hulling outlet (35) of the supply hopper (2). Then, the pull-off rolls (3) and (4), which are respectively supported by the support shafts (37) and (38), are opposed to each other.
8) while supporting the transmission gears (39) and (40)
A gear case (41) is provided in the hulling case (36),
The gears (39) and (40) are provided inside the case (41). Further, drive gears (44) and (45) are supported in the case (41) via power shafts (42) and (43), and the gears (39) (40) and (44) (45) are always meshed. And the support shaft (3) of one of the removal rolls (4).
8) is supported in the middle of the gap adjusting link (46), and one end of the link (46) is supported on the same axis as one of the power shafts (43). And a gap adjusting shaft (49) interlockingly connected to the propulsion motor (7) via gears (47) and (48), and the other end of the link (46) is connected to the shaft via a nut member (50). (49) The screw portion (49a) at one end is screwed and connected, and the roll gap (51) between the rolls (3) and (4) into which paddy is charged by the forward / reverse control of the motor (7) is automatically enlarged / reduced. At the same time, the handle (52) is attached to the other end of the shaft (49), and the roll gap (51) is manually adjusted by rotating the handle (52). I have.

A valve opening (grind amount) adjusting bolt (54) for swinging the rice grind amount adjusting valve (5) about the base fulcrum shaft (53) is provided. And a light-emitting element (56) and a light-receiving element (57) disposed opposite to the hulling case (36) below the rolls (3) and (4). And a photoconductive rice sensor (58) comprising:

As shown in FIG. 1, the hulling motor (34)
Current sensor (59), which is a load sensor that detects the driving load of the motor from the current value, and a voltage value that detects the voltage value of the three-phase AC power supply (R) (S) (T) of the hulling motor (34). A sensor (60), the valve opening sensor (55),
The paddle sensor (58), the screw-ratio setting device (61) for initially setting the screw-ratio reference value, and the screw-ratio motor (7) are manually rotated forward and reverse to enlarge the roll gap (51). Push-button open / close switches (62) and (63) for reducing and adjusting, a memory (64) which is a non-volatile RAM (RAM whose contents are not erased even when the power is turned off), and a load on the hulling motor (34) LED display (6)
5) and a CPU including a hulling motor protection circuit (66)
And a drive circuit (67) provided by an output signal from the drive rate control circuit (67).
8) The forward / reverse rotation of the motor (7) is appropriately driven through 8),
The roll gap (51) is adjusted so as to be a control target current value.

As shown in FIG. 4, the load indicator (65)
Is provided on the control panel (69) together with the main switch of the huller, the automatic manual operation changeover switch, the open / close switches (62) and (63), etc., and displays the load of the huller motor (34) on the display lamp (Y). (G1) (G2)
(G3), (G4), (G5), (R1), and (R2) are displayed in eight stages, and the display lamp (Y) indicates that there is no load. The load increases and the display lamp (G5) has a load factor of 100%.
And (R1) and (R2) indicate overload.

The present embodiment is configured as described above, and the operation will be described below with reference to FIGS.

The lock-out rate control circuit (67) stores a lock-up state (control target current value, power supply voltage value, valve opening) in a memory (64). As a starting point, control is performed in response to each subsequent change, that is, as shown in FIG. 5, when the hulling operation is started (the hulling sensor is turned on), the control target is stored in the memory (64). The storage current value (Y1), the storage power supply voltage value (X1), and the storage valve opening (Z1), which are current values, are called. And
The storage current value (Y1) is within the set range (from the current value of the lighting level of the display lamp G1 of the load indicator to the current value of the lighting level of the display lamp R2), and the storage power supply voltage value (X
1) and the storage valve opening (Z1) is the current power supply voltage value (X
2) and when the valve opening (Z2) is the same, the normal control (entering the steady operation) of adjusting the roll gap (51) so that the stored current value (Y1) is performed, while the stored current value When (Y1) is outside the set range and is an abnormal value, or when the storage power supply voltage (X1) is different from the current power supply voltage (X2), or when the storage valve opening (Z1) is the current valve opening ( Z
If it is different from 2), the storage current value (Y1) is not set as the control target, and the current value (Y2) is set to the preset current value (Y2).
3) The normal control is performed after the initial control for adjusting the roll gap (51) so as to be (current value of the lighting level of the display lamp G5 of the load indicator).

In the initial control, if the current valve opening (Z2) is smaller than 40 °, that is, if the amount of polished rice is smaller than the standard, if the set current value (Y3) is set as a control target, a dart is set. At this time, the set current value (Y4) (the current value of the lighting level of the display lamp G3 of the load indicator) is the control target.

When the hulling operation is completed or the shutter (6) is closed and the operation is interrupted (the hulling sensor is turned off).
), The storage current value (Y1) which is the control target at that time
And storage power supply voltage value (X1) and storage valve opening (Z1)
Is stored and held in the memory (64) as the starting state at the time of the next hulling work or the work reproduction after the interruption of the work.

In the normal control, as shown in FIG. 6, the current value (Y2), the power supply voltage value (X2), and the valve opening (Z2) are sampled at predetermined time intervals, and the current power supply voltage (Y2) is sampled. X2) and the valve opening (Z2) correspond to the stored power supply voltage (X
1) and when the storage valve opening (Z1) is the same, the current value (Y2) is changed to the storage current value (Y1) such that the current value (Y2) becomes the storage current value (Y1). When the roll gap is smaller or larger, the motor is controlled so as to reduce or enlarge the roll gap (51) so as to maintain a constant screw removal rate.

If the current power supply voltage (X2) is different from the storage power supply voltage (X1), the roll gap (51)
Without changing the storage current value (Y1) and the storage voltage value (X1)
To the current current value (Y2) and voltage value (X2), and then adjust the roll gap (51) so that the stored current value (Y1) is obtained. When the current valve opening (Z2) is different from the memory valve opening (Z1), the roll gap (51) is changed according to the changed valve opening (Z2). After the adjustment, the stored current value (Y1) and the stored valve opening (Z2) are rewritten to the current value (Y2) and the valve opening (Z2).
The roll gap (5) is adjusted so that the stored current value (Y1) is obtained.
The adjustment of 1) is performed.

The roll gap (51) in the initial control
The current value (Y2) is adjusted to the set current value (Y3).
Or, when the current value (Y2) is smaller or larger than the set current value (Y3) (Y4), the roll gap (51) is reduced or enlarged so that the roll gap motor ( 7).

As shown in FIG. 7, in the normal control and the initial control, the load factor of the hulling motor (34) is 130%.
Performed only in the following cases, and in the case of more than that, the reduction operation of the roll gap (51) is prohibited, and the roll gap (51) is expanded until the load factor of the hulling motor (34) becomes 130% or less. As described above, the hulling motor protection control for driving and controlling the husking rate motor (7) is performed by the hulling motor protection circuit (66) of the husking rate control circuit (67).

[0023]

As is apparent from the above embodiments, the present invention maintains the screw removal rate by keeping the load current value of the motor (34) driving the pair of screw removal rolls (3) and (4) constant. The control device stores and holds the control target current value when the work is interrupted, and also stores and holds the power supply voltage value of the motor (34) and the rice milling amount which is the amount of paddy supplied to the rolls (3) and (4). By providing the memory (64) for performing the operation, the stored current value, the stored power supply voltage, and the stored rice milling amount are reflected in the control at the time of restarting the work.
Measures can be taken to prevent malfunctions when the power supply voltage changes or when the amount of milled rice differs.

When the operation is resumed, the stored current value becomes an abnormal value.
Means for determining whether or not the stored power supply voltage value and the stored rice milling amount (Z1) are the same as the current power supply voltage value (X2) and the rice milling amount (Z2). When the storage current value (Y1) is an abnormal value , or when the storage power supply voltage value (X1) is different from the current power supply voltage value (X2), or when the storage rice polishing amount (Z1) is the current rice polishing amount. When it is different from (Z2), the current value (Y
By controlling so as to be 3) or (Y4), when the power supply voltage changes, when the work is interrupted and when the work is restarted, or when the amount of milled rice is different, or the stored current value (Y1) Can be prevented from malfunctioning when it is different from the actual condition, and more stable hulling performance can be obtained.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a degassing rate control circuit.

FIG. 2 is an overall sectional view of the huller.

FIG. 3 is an explanatory sectional view of a hulling unit.

FIG. 4 is an explanatory diagram of a load indicator.

FIG. 5 is a flowchart.

FIG. 6 is a flowchart.

FIG. 7 is a flowchart.

[Explanation of symbols]

 (3) (4) De-rolling roll (67) De-rolling rate control circuit (Y1) Stored current value (control target current value) (Y2) Current current value (X1) Stored power supply voltage value (X2) Current power supply voltage Value (Z1) Memory valve opening (memory rice amount) (Z2) Current valve opening (current rice polishing amount) (Y3) (Y4) Set current value

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Masahiko Sasaki 428 Enami, Okayama City, Okayama Prefecture Inside of Sairei Industry Co., Ltd. (56) References JP-A-3-221152 (JP, A) JP-A Sho 63-100941 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B02B 1/00-7/02 109

Claims (2)

(57) [Claims] 1. An apparatus for maintaining a pull-out rate by keeping a motor load current value for driving a pair of pull-out rolls constant, wherein a control target current value at the time of work interruption is stored and held, and a power supply of the motor is provided. A hulling rate control device for a rice hulling machine, comprising: means for storing and holding a voltage value and an amount of polished rice, which is an amount of chaff supplied to a hulling roll. Means for judging whether or not the stored current value is an abnormal value at the time of resuming the operation; and determining whether the stored power supply voltage value and the stored rice milling amount are the same as the current power supply voltage value and the current rice milling amount. Means for determining whether or not the stored current value is an abnormal value , or when the stored power supply voltage value is different from the current power supply voltage value, or when the stored rice milling amount is different from the current rice milling amount. Sometimes, a certain
2. The hulling rate control device for a hulling machine according to claim 1, wherein the current value of the motor load factor is controlled.