JPH0767538B2 - Removal rate control device for huller - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an apparatus for controlling the removal rate of a hulling machine provided with a pair of left and right removing rolls.

[Conventional technology]

In the paddy huller, the removal rate sensor detects the removal rate of the scraped rice removed by the pair of removal rollers,
The removal rate control in which the pair of removal roll gaps is increased or decreased so that the removal rate becomes a preset target removal rate is described, for example, in JP-A-60-7944. .

[Problems to be solved by the invention]

The removal rate control by this method is a so-called feedback control in which the removal rate after removal is checked and the gap between the two removal rollers is increased or decreased so that this removal rate becomes a preset target removal rate. Therefore, the current type decapsulation rate control (detects the load current of the motor that drives the pair of decapsulation rolls, and sets the load current reference value to obtain the preset target decapsulation rate. It has an advantage that the precision of the removal rate is higher than that of the one in which the gap of the roll is increased or decreased.

However, the feedback control by this depulling rate sensor detects the debuffing rate of the scrapped rice after the debuffing and compares this deplacing rate with the target deplacing rate to increase or decrease the gap between both depuffing rolls. By repeating the above procedure, the dewatering rate of the scrapped rice is made to match the target removal rate. Therefore, it takes a considerably long time for the removal rate of the scrapped rice to reach the predetermined target removal rate. There was a problem with the point.

The present invention aims to solve this problem.

[Means for solving problems]

In order to achieve this object, the present invention provides "a pair of depulling rolls and a mechanism for adjusting a gap between the both depulping rolls, and removing sludge rice removed by the both depreading rolls. A paddy provided with a sensor type removal rate control means for detecting the removal rate with a removal rate sensor and increasing or decreasing the gap between the two removal rolls so that the detected removal rate becomes equal to the target removal rate. In the sliding machine, prior to increasing or decreasing both dew roll gaps according to the dep rate detected by the dep rate sensor during the dep rate control by the sensor type dep rate control means,
Means for increasing or decreasing the gap between the two removing rollers according to the difference between the load current value in the removing roller driving motor and the load current reference value corresponding to the target removing rate for an appropriate time. To provide. "."

[Operation and effect of invention]

According to this structure, the gap between the two removing rolls is controlled according to the difference between the removing ratio and the target removing ratio in the slid rice after the removing during the removing ratio control by the sensor type removing ratio control means. When increasing / decreasing, prior to this, it is possible to increase / decrease according to the difference between the load current value in the drive motor of both de-wapping rolls and the load current reference value corresponding to the target de-pulling rate,
In other words, the gap between the two removing rolls is not the detection of the removing ratio of the slid rice by the removing ratio sensor, and the gap between the removing rolls is increased or decreased in accordance with the detection. Depending on the difference between the load current value in the drive motor and the load current reference value corresponding to the target depletion rate, it is possible to increase or decrease at once until a predetermined target depletion rate is obtained, and then Feedback control will be performed by the rate sensor.

Therefore, according to the present invention, in the feed back control of the removal rate by the removal rate sensor, it is possible to achieve the removal rate of the scraped rice after removal in accordance with the predetermined target removal rate in a very short time. Therefore, it has an effect of remarkably reducing the removal failure which occurs until the removal rate of the scrapped rice reaches the predetermined removal rate.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

In the figure, reference numeral 1 indicates an upper paddy supply hopper 2 and a pair of left and right depreading rolls 3 and 4 at the lower part of the paddy feed hopper 2 and slides after the deploping rolls 3 and 4 have been removed. 1 shows a huller comprising a wind-selecting section 5 for wind-selecting rice husks from fallen rice with a suction fan 6, and the fallen rice after being wind-selected by the wind-selecting section 5 is transferred from a chute 7 to a bucket conveyor. Enter 8,
It is sent out of the machine by the bucket conveyor 8.

The deploping rolls 3 and 4 are rotationally driven by a motor 9 and one of the deploping rolls 3 and 4 is rotated.
Is a position-fixing type, but the other removing roll 4 is configured to move toward or away from the one removing roll 3 by a gap adjusting mechanism 11 driven by an actuator 10.

A paddy supply amount control valve 12 and a lead roll 13 are provided between the paddy supply hopper 2 and the depitting rolls 3 and 4 to drive the depitting rolls 3 and 4 to rotate. The other motor 9 has an ammeter 14 for detecting its load current.
Further, the paddy supply amount control valve 12 includes the paddy supply amount control valve.
A paddy supply amount sensor 15 for detecting the amount of paddy supplied according to the opening degree of 12 is provided.

Further, between the wind selecting unit 5 and the chute 7, the wind selecting unit 5
A sampling gutter 16 is provided for extracting a part of the deciduous rice that falls from the sampling gutter 16 and a sampling rate sensor 17 for detecting the desquamation rate of the deciduous rice is provided in the sampling gutter 16.

Further, reference numeral 18 in the figure is a control circuit for increasing / decreasing the gap between the two dew rolls 3 and 4 based on the signals from the ammeter 14, the paddy supply amount sensor 15 and the dew rate sensor 17. The control circuit 18 detects the depletion rate of the scraped rice that has been depleted by the depletion rolls 3 and 4 by the depletion rate sensor 17, and the detected depletion rate X ′ is the target depletion rate. Sensor type removal rate control means for increasing / decreasing the gap between the two removal rate rolls 3 and 4 so as to be equal to X, and both removal rate sensors controlled by the sensor type removal rate control means Prior to the increase / decrease of the clearance, the load current reference A corresponding to the load current value A and the target desorption rate X in the motor 9 for driving both removing rolls is set to the gap between the removing rolls 3 and 4 for an appropriate time T. And means for increasing or decreasing according to the difference from the value B.

This will be described in detail with reference to the flowchart shown in FIG. 3. In step S1 following the start, a preset target dewetting rate X is read, in the next step S2, the paddy supply amount Q is read, and then in step S3, From the target shedding rate X and the paddy supply amount Q, a load current reference value B corresponding to the target shedding rate X and the paddy supply amount Q is calculated based on, for example, an equal shedding rate curve as shown in FIG. To do.

Then, in step S4, after the depletion rate sensor 17 detects the depletion rate X ′ of the deciduous rice that has been depleted by the both de-rolling rolls 3 and 4, in the next step S5, the depletion rate of the deciduous rice is removed. X ′ is compared with the target depouring X, and if X> X ′, in step S6 the gap between the deploping rolls 3 and 4 is narrowed,
If <X ', in step S7 both depulling rolls 3, 4
By taking action to widen the gap, the removal rate control is performed by the feed pack control of the sensor type removal rate control means.

Then, between the steps S4 and S5, step S8 for detecting the load current value A of the both removing roll drive motors 9 is inserted, while the steps S5 and S6 are inserted.
And between step S5 and step S7, the absolute value A of the load current value and the absolute value B of the load current reference value.
Insert step S9 and step S10 to compare with, and when A = B in step S9 and A = B in step S10, the process directly proceeds to steps S6 and S7 and the removal rate of the feedback by the removal rate sensor. Control is performed, but if A ≠ B in step S9,
In step S11, the operation is performed so that the interval between the two removing rolls 3 and 4 is narrowed by T seconds.

In this case, the T second is set to be long in proportion to the difference between A and B.

By inserting these step S8, step S9, step S10, staple S11 and step S12, both dewetting before and after the desorption rate sensor 17 increases or decreases the desorption rate sensor 17 during the control by the sensor type desorption rate control means. Roll 3,
The gap of 4 can be increased / decreased for an appropriate time T according to the difference between the load current value in the both removing roll driving motors 9 and the load current reference value B corresponding to the target removing ratio X. Of.

[Brief description of drawings]

The drawings show an embodiment of the present invention, FIG. 1 is a vertical sectional front view of a hulling machine, FIG. 2 is a view showing a uniform removal rate curve, and FIG. 3 is a flowchart. 1 ... hulling machine, 2 ... hull supply hopper, 3,4 ... dep roll, 5 ... wind selection part, 6 ... suction / dust fan, 9 ... dep roll drive motor, 11 ... … Gap adjustment mechanism, 12 …… Rice supply amount control valve, 14 …… Ammeter, 15 …… Rice supply amount sensor, 17 …… Peeling rate sensor, 18 …… Control circuit.

Claims (1)

[Claims] 1. A pair of depulling rolls and a mechanism for adjusting the gap between the both deploping rolls are provided, and the depulling rate of the scraped rice removed by the both deploping rolls is removed. In the hulling machine comprising a sensor type removal rate control means for detecting the removal rate by a rate sensor and increasing or decreasing the gap between the two removal rollers so that the detected removal rate becomes equal to the target removal rate. Prior to increasing or decreasing the gap between both dep rolls in accordance with the dep rate detected by the dep rate sensor during the dep rate control by the expression dep rate control means, the gap between both dep rolls should be adjusted for an appropriate time. In the grain hulling machine, only means is provided for increasing or decreasing in accordance with the difference between the load current value in the both removing roll driving motor and the load current reference value corresponding to the target removing ratio. Removal rate control device.