JPS63200842A - Gluten-removal rate controller in rice huller - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for controlling the dehulling rate in a hulling machine equipped with a pair of right and left dehulling rolls.

[Conventional technology and its problems]

Japanese Patent Application Laid-open No. 56-91851 as a prior art discloses that the load current of a motor that drives a pair of dehulling rolls is detected, and this load current is evenly dehulled based on a preset target dehulling rate and the amount of paddy supplied. The paper proposes a so-called 711-style stripping rate control in which the gap between the pair of stripping rolls is increased or decreased so that the load current reference value is determined from the stripping rate curve.

In this current-type descaling rate control, the gap between a pair of desiliconizing rolls is controlled in response to the load current of the desiliconizing rolls, so that fluctuations in the dehulling state of paddy immediately cause a load on the desiliconizing rolls. Since it appears in the electric current, it has the advantage that there is no time delay and there is no time delay and there is no time delay and the transition from the time when paddy is started being supplied at the start of the de-f7 operation is smooth, but it also has the following disadvantages.

That is, in this current-type dehulling rate control, the equal dehulling rate curve when determining the load current reference value based on the target regulation rate and the paddy supply port is well known, and
As shown in Figure 2, as the amount of paddy supplied decreases, the load current decreases. There is a no-load current value IO when rotating and driving in a no-load state, and the load current for re-rolling is this no-load current value 1
It never goes below o.

When the paddy supply port is set to a small value, the load current reference value may become smaller than the no-load current value IO, and in such a state, the load current for re-rolling is lower than the load current. Since it is larger than the standard value, the gap of the re-de-rolling is wide (it will be controlled so that it is
This results in defective desiliconization.

The present invention aims to solve this problem.

[Means to solve the problem]

In order to achieve this object, the present invention comprises a pair of left and right desiliconizing rolls, a mechanism for adjusting the gap between the two desiliconizing rolls, and a mechanism for adjusting the gap between the two desiliconizing rolls, and a load current of a motor that drives the re-desiliconizing rolls. is detected and the gap between the two rolls is increased or decreased so that this load current becomes the load current reference value calculated from the equal regulation rate curve based on the preset target regulation rate and the amount of paddy supplied. In a rice huller equipped with a dehulling rate control means, the dehulling rate after dehulling by the re-dehulling roll is detected, and the dehulling machine is controlled so that the detected standard rate becomes equal to the target dehulling rate. Feedback type dehulling rate control means for increasing or decreasing the gap, means for detecting that the amount of paddy supplied is less than a predetermined opening, and means for detecting that the gap between the two dehulling rolls has opened beyond a predetermined value. When the amount of paddy supplied is less than a predetermined amount and the gap between both de-stripping rolls is larger than a predetermined value, the current-type de-stripping rate control means performs the specified rate control, and the feedback-type de-hulling rate control means controls the de-hulling rate. The configuration includes a means for switching to.

[Action/effect of the invention]

With this configuration, by setting the paddy supply port for the re-de-stripping rolls to a small value, when the gap between the re-de-stripping rolls becomes larger than a predetermined value, the dehulling rate is controlled by the current specified rate control. Control is switched from control by the feedback type de-stripping control means to control by the feedback type de-stripping control means, and the gap between the re-de-stripping rolls is narrowed in accordance with the de-f7 rate after step a, and the de-stripping rate after de-stripping reaches the target specified rate. It is controlled so that

Therefore, according to the present invention, the occurrence of defective dehulling when the amount of paddy supplied is small, which is a drawback of the current type dehulling rate control means, can be reliably prevented by controlling the prescribed rate by the feedback type dehulling rate control means. Therefore, it is possible to stably control the dehulling rate of the low paddy supply port.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral l indicates a paddy supply hopper 2 at the upper part, a pair of left and right desiliconization rolls 3.4 at the lower part of the paddy supply hopper 2, and the desiliconization rolls 3.4. ■It shows a paddy rice harvesting machine equipped with a wind selection section 5 for wind-selecting the rice husks from the fallen rice that has been desilisized by the rolls 3゜4 with a suction dust removal fan 6. The selected brown rice enters a brown rice receiving trough 7 and is configured to be sent out of the machine by a screw Jα conveyor 8 in the brown rice receiving trough 7.

The re-de-silicating rolls 3 and 4 are rotationally driven by a motor 9, and one of the re-de-silicizing rolls 3.4 is of a fixed position type, while the other desiliconizing roll 4 is of a fixed position type. is configured to move toward or away from the one desiliconization roll 3 by a gap adjustment mechanism 11 driven by an actuator 10.

A manual opening/closing type jabter 12 and a paddy deceleration valve 13 are installed between the paddy supply hopper 2 and the re-desorption roll 3.4.
and a lead roll 14, and the motor 9 for driving the bipolar rolls 3, 4 is provided with an ammeter 15 for detecting the load current thereof.

Moreover, between the shutter 12 and the paddy regulating valve 13,
A photoelectric paddy flow sensor 16 consisting of a light emitter 16a and a light receiver 516b is installed to detect the flow of paddy relative to the double rolls 3 and 4. Each of them is provided with a set paddy supply amount sensor 17 for detecting the set value of the amount.

Furthermore, in a portion of the wind sorting section 5 that faces the grain flow board 5a, there are provided a light projector 18a that irradiates light onto the grain flow board 5a, and a light receiver 18 that receives reflected light from the grain flow board 5a.
A photoelectric desexualization rate sensor 18 consisting of b is provided.

Reference numeral 19 in the figure indicates the ambidextrous rolls 3 and 4 based on signals from the ammeter 15, paddy flow rate sensor 16, set paddy supply amount sensor 17, and de-sexing rate sensor 18.
A control circuit for controlling the increase/decrease of the gap is shown, and the control circuit 19 includes a load current detected by the ammeter 15, a preset target desiliconization rate Xo, and the paddy regulating valve 13.
Based on the set paddy supply amount Qo, the current-type regulation rate is such that the gap between the two removal rolls 3.4 is increased or decreased so that the i-load current reference value lx is calculated from the uniform regulation rate curve in Figure 2. a control means, and a feedback type regulation rate that increases or decreases the gap between the double-sided rolls 3 and 4 so that the regulation rate X detected by the desexing rate sensor 18 becomes a preset target regulation rate XO. The control means and the paddy supply amount QO are a predetermined amount Q.

means for detecting that the gap between the two a-stripping rolls 3.4 is larger than a predetermined value; 4 is opened beyond a predetermined value, switching the de-114 control by the current type silica removal rate control means to the prescribed rate control by the feed bank type prescribed rate control means.

To explain this in detail in the flowchart shown in FIG. 3, step S1 and step S following the start
In Step 2, the count number Ck and a flag, which will be described in detail later, are each set to zero, and then in Step S3, it is determined whether or not the flag is 1, which will be described later. In this determination, when the flag is -1, the process moves to feedback type specified rate control (step S4) which will be described in detail later, but when the K flag is not -1, the target silicon removal rate Xo set in advance in step S5 is changed to Paddy control valve 1
After reading the set paddy supply amount QO set in step 3, it is determined in step S7 whether the set paddy supply amount Qo is greater than the minimum value Qomin, and if yes, the S flag is set to zero in step S8. If the answer is no, the S flag is set to 1 in step S9, and the process moves to step 510.

In this step SIO, a load current reference value 1x is calculated from the constant rate curve of FIG. 2 based on the target JB[rate After reading the load current I of No. 4 and the paddy flow iQ detected by the paddy flow rate sensor 6 in step S12, in step 313, the paddy flow rate Q
is larger than the minimum value Qmin, and if no, that is, if Q≦(1+in), step S3 is performed.
, but when it is yes, that is, Q > Qa+i
When n, the process moves to step S14.

Then, in this step S14, the load current ■
and the load current reference value Ix, and when r-rX, the count number Ck is set to zero in step S15 and then returned to before the step S3, while when I<lx, an ambiguous roll is performed in step S16. After narrowing the gap between 3 and 4 by a minute amount (for example, about 0.011 m), step S3 is performed.
Returning to the previous step, if I>Ix in step S14, the gap between the double-sided rolls 3.4 is widened by a small amount m (for example, about 0.01 mm) in step S17, and then the process moves to step 818.

In this step 518, it is determined whether or not the S flag is 1. If no, that is, Q≦Qmin, the process returns to the step S3, but if yes, that is, Q>Qo+in, the count number Determine whether Ck is a predetermined count number Ckmar (for example, 15 to 10 times), and if the count number Ck is not a predetermined count number Ckrmax (in case of no)
, 1 is added to the count number Ck in step 520, and the process is returned to before step S3, while the count number Ck is
is the predetermined count number Ckmax (y
In the case of ss), the flag is set to 1 in step S21, and then the process returns to before step S3.

Therefore, by performing control through the above routine at appropriate time intervals, when the amount of paddy supplied QO is small and the gap between the two de-rolling rolls 3 and 4 is opened more than a predetermined value, the current regulation rate control means can control the regulation rate. The rate control can be automatically switched to the prescribed rate control using the feedback type parent culm rate control means.

Further, the feedback type prescribed rate control in step S4 is a flowchart as shown in FIG.

That is, first, in step S4a, the paddy count number M, brown rice count number G, and sample count number S, which will be described in detail later, are each set to zero, and then step S4b is performed.
In this step, the reflection detection value Vx received by the light receiving web in the photoelectric regulation rate sensor 18 is read.

This reflection detection value Vx is the largest in the case of the reflected light from the grain board 5a, and in the case of the reflected light from brown rice, it is a smaller value Vc than in the case of the reflected light from the grain board 5a. In the case of the reflected light from the brown rice, the value Vm is smaller than that in the case of the reflected light from the brown rice, so it is determined in the next step S4c that Vx<Vm, and when YES, it is determined that the reflected light is from the paddy, and the process proceeds to step Sd. After adding 1 to the count number M of paddy, the process moves to step 34g, which will be described later. However, if no in step S4c, it is determined in step S4a that Vx≧Vc, and if no, reflection from brown rice and After making a judgment and adding 1 to the counted number G of brown rice in step Sf, the process moves to the next step S4g. On the other hand, when Vx≧Vc in the step S4e, it is judged that the reflection is from the grain board 5a and the process continues as it is. The process moves to step S4h, which will be described later.

Then, in step 54g, 1 is added to the sample count S, and in step S4h, it is determined whether the sample count S has reached a predetermined sample number Sx, and the sample count S has reached the predetermined sample number Sx. If the number Sx has not been reached, the process returns to step S4b and is repeated at minute time intervals to obtain the predetermined sample fj! , detect how many pieces of brown rice are in S xO.

Next, in step 84k, the number G of brown rice is divided by the number S of samples to obtain the regulation rate
At step j, the de-f7 rate X and the preset target culm rate By narrowing the gap between the ambidextrous rolls 3 and 4, feedback control is performed so that the 7 rate X after desexing becomes the preset target regulation rate XO.

In addition, when detecting the culm rate after desexing using the photoelectric regular rate sensor 18, the photoelectric regular rate sensor 18 is removed from the grain grain board 5a as shown in FIG. If it is located in the correct position, the influence of reflected light from the grain board 5a can be reduced. Also, ambiguous roles 3 and 4
When the load current becomes the no-load current in the bipolar rolls 3 and 4, it is also possible to switch from current-type regular rate control to feedback-type regular rate control.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a longitudinal sectional front view of the yJ sliding machine, Fig. 2 is a diagram showing a regular rate curve, and Figs. FIG. 5 is a diagram showing an example of the mounting position of the regulation rate sensor.

Claims (1)

[Claims] (1) It is equipped with a pair of left and right stripping rolls and a mechanism for adjusting the gap between the two stripping rolls, and detects the load current of a motor that drives the two stripping rolls, and detects this load current. a current-type shedding rate control means that increases or decreases the gap between the re-dehulling rolls so that the load current becomes a reference value of the load current calculated from an equal dehulling rate curve based on a preset target dehulling rate and the amount of paddy supplied; In the rice hulling machine equipped with the above-mentioned rice hulling machine, the dehulling rate after dehulling by the two dehulling rolls is detected, and the gap between the two dehulling rolls is increased or decreased so that the detected dehulling rate becomes equal to the target dehulling rate. In addition to providing a feedback type withdrawal rate control means to
means for detecting that the amount of paddy supplied is less than a predetermined amount; means for detecting that the gap between the two de-rolling rolls is larger than a predetermined amount; means for switching the removal rate control by the current type removal rate control means to the removal rate control by the feedback type removal rate control means when the opening exceeds a predetermined value. De-hulling rate control device in a rice huller.