JPS63274458A - Dehulling ratio controller in 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]

In the hulling machine, the dehulling rate of the scraped rice that has been dehulled by the dehulling roll is detected by the dehulling rate sensor, and the dehulling machine detects the dehulling rate of the grained rice that has been dehulled by the dehulling roll, and the dehulling machine detects the dehulling rate of the grained rice that has been dehulled by the dehulling roll, and the dehulling machine detects the dehulling rate of the grained rice that has been dehulled by the dehulling roll, and the dehulling machine detects the dehulling rate of the scraped rice that has been dehulled by the dehulling roll, and the dehulling rate of the rice that has been dehulled by the dehulling machine is adjusted so that the dehulling rate detected is equal to the target dehulling rate set in advance. A sensor type de-sexing rate control in which the gap between the culm rolls is increased or decreased is described in, for example, Japanese Patent Laid-Open No. 60-7944.

[Problem that the invention seeks to solve]

This sensor-based de-scaling rate control looks at the de-hulling rate of the scraped rice after it has been de-hulled, and increases or decreases the gap between the two de-scaling rolls so that this de-hulling rate reaches a preset target de-hulling rate. Since it is a so-called feed bank control, current type desexing rate control (the load current of the motor that drives a pair of desexing rolls is detected, and this load current is adjusted to a load current value that obtains a preset target desexing rate). Compared to the method in which the gap between both deculling rolls is increased or decreased so that

However, this sensor-based desexing rate control monitors the desexing rate of the fallen rice after desexing and feedback controls the desexing state so that the desexing rate becomes the target desexing rate. When starting desexing work, changing the target desexing rate,
When changing the amount of paddy supplied, the dehulling rate after dehulling is
Since the desexualization rate is controlled so that it approaches the target desexualization rate once it deviates significantly from the target desexualization rate, it takes a considerable amount of time until the desexualization rate reaches a steady target desexualization rate state. There is a problem in that it requires a long time, in other words, the response is rapid, and a large amount of debonding defects occur during this time.

The present invention aims to solve the above-mentioned problems in sensor-type desexing rate control.

[Hands to Solve the Problem] For this reason, the present invention includes a pair of stripping rolls and a mechanism for adjusting the gap between the two stripping rolls, and a mechanism for adjusting the gap between the two stripping rolls. A sensor type that detects the de-sexing rate of the rubbed rice with a de-sexing rate sensor and increases or decreases the gap between the two de-flaking rolls so that the detected de-hulling rate is equal to or substantially equal to a preset target de-hulling rate. In a rice hulling machine comprising a dehulling rate control means, the sensor-type dehulling rate control means is controlled by a first rice huller that controls the dehulling rate to fall within a relatively wide range sandwiching a target dehulling rate. a second sensor that controls the desexing rate controlled by the first sensor-type desexualizing rate control means to fall within a narrow range sandwiching the target desexualizing rate; It is composed of a type desexualization rate control means.

[Action/effect of the invention]

With this configuration, at the start of the de-sexing work, the first sensor-type de-sexing rate control means allows the de-sexing rate of the fallen rice to fall within a relatively wide range sandwiching the target de-sexing rate. After that, the desexing rate is controlled roughly so that it falls within a narrow range sandwiching the target desexing rate using the second sensor type desexing rate control means. Therefore, when performing sensor-type debonding rate control, it is possible to shorten the time required to reach a steady debonding rate state in which a stable target debonding rate is obtained, and in other words, it is possible to improve responsiveness.

Therefore, according to the present invention, it is possible to significantly reduce dehulling defects that occur at the start of dehulling work or when changing the target dehulling rate or the amount of paddy supplied.

〔Example〕

The following describes the drawings in which the embodiments of the present invention are applied to a huller in a rice hulling and sorting device.
The whole is composed of a horizontally long box-shaped wind selection mechanism 1, a huller 2 mounted on the upper left side of the wind selection mechanism 1, and a rotary sorting mechanism 3 mounted on the upper right side of the wind selection mechanism 1. There is.

The hulling machine 2 includes a case 4 with a paddy supply hopper 5, a pair of left and right stripping rolls 6.7 provided in the case 4, a manually opened/closed shutter 8, and a paddy supply amount adjustment valve 9. Both of the dehulling rolls 6 and 7 are rotationally driven by a dehulling motor 10 provided inside the wind selection mechanism 1, and one of the dehulling rolls 6 is of a fixed position type, while the other dehulling roll 6 is of a fixed position type. The gap adjustment mechanism 1 is driven by an actuator 11.
The paddy supply amount regulating valve 9 is configured to be opened and closed by an actuator 13.

In this case, the stripping motor 10 for both striping rolls 6.7 is provided with an ammeter 14 for detecting its load current, and the paddy supply amount control valve 9 is provided with an ammeter 14 for detecting its opening position. A positioner 15 is provided on each of the release rolls 6.7, and an unfolding mechanism (not shown) is provided on each of the release rolls 6.7 to open the gap in priority over the gap adjustment mechanism 12 in an emergency. ing.

The air selection mechanism 1 includes a pressure fan 16 that sucks the atmosphere;
It consists of a dust removal fan 17, a wind selection section 18 for fallen rice and a wind selection section 19 for brown rice, which are provided between the two fans 16 and 17.
The wind-selecting section 18 for fallen rice is located almost directly below the huller 2, and wind-sorts the chaff from the fallen rice after dehulling. ! ! The rice is sent to the rotary sorting mechanism 3 by the bucket conveyor 22 from the sliding rice gutter 20 with the rotary conveyor 21, and the brown rice sorted by the rotary sorting mechanism 3 is sent to the brown rice sorting section 19. The finished brown rice is further subjected to wind selection, and the finished brown rice after wind selection is taken out of the machine by a bucket conveyor 24 from a brown rice gutter 23 with a spiral conveyor.

In this case, in the middle of the fallen rice conveyance route from the fallen rice winding part 18 or the fallen rice sorting part 18 to the rotary sorting mechanism 3, the demolding rate of the fallen rice is detected. A desexing rate sensor 25 is provided for each of the spiral conveyors 21 and bucket conveyors 22.24 and both fans 16.1.
7, power is transmitted from the desiliconizing roll 6.7.

On the other hand, the rotary sorting mechanism 3 includes rotary sorting cylinders 27 horizontally installed in upper and lower stages in the box-shaped case 26, and both sorting cylinders 27 are installed horizontally in the box-shaped case 26. Both sorting cylinders 27 The third
It is configured to be rotationally driven in the direction indicated by arrow A in the figure.

The two sorting cylinders 27 have one end farthest from the huller 2 on the supply side 27a, and the other end closer to the huller 2 on the discharge side 27b. A large number of recesses 31 are formed that are large enough to fit into.

Furthermore, a brown rice receiving trough 32 with a spiral conveyor is provided in each of the sorting cylinders 27, and the brown rice receiving trough 32 is provided with a spiral conveyor.
A dropped rice receiving trough 33 with a spiral conveyor is installed adjacent to the trough.

The fallen rice sent from the bucket conveyor 22 is
Approximately equal amounts of brown rice enter the two-sided rice receiving trough 33 through the chute 34, and are supplied to the supply side 27a in the sorting cylinder 27 through the two suri-suri fallen rice receiving troughs 33, while the two brown rice receiving troughs 3
The brown rice that has entered the chamber 2 is configured to join a chute 35 and then fall into the brown rice screening section 19.

Further, the discharge side 27b of both sorting cylinders 27 is provided with a plurality of paddy scraping blades 36 on its inner surface, and a paddy return chute 37 is provided between the paddy supply hopper 5 in the huller 2 and the paddy return chute 37.
is mounted thereon, and is configured to return paddy to the paddy supply hopper 5.

Reference numeral 38 is an electronic control device for appropriately operating the actuator 11 for the gap adjustment mechanism by inputting signals from the ammeter 14, the unweighing rate sensor 25, and the like.

As will be described in the following embodiments, this electronic control device 38 controls the detection deweighing rate B detected by the desexing rate sensor 25 to Bo+β and B with a preset target deweighing rate BO in between.
A first sensor-type desexing rate control means that roughly controls the desexing rate so that it falls within a relatively wide range between A second sensor type desexing rate control means is provided for precisely controlling the rate B so that it falls within a narrow range between Bo+α and BO−α with the target desexualizing rate Bo in between.

To explain this in detail in the flowchart of the embodiment shown in FIGS. 4 and 5, in the flowchart of FIG. Each load current A is read, and then step S
In step 3, the load current A is compared with the current Aa of the unloading motor 10 when there is no load, and if A>Aa is not the case, the process returns before the step Sl, but if A>Aa, the process proceeds to the next step S4. It is determined whether or not the automatic switch for desexing control is on, and if the automatic switch is not on, that is, when manual tax culm rate control is being performed, the process proceeds to step S5, and here it is determined whether or not the unfolding mechanism has been operated. When the deployment mechanism is not operated, that is, when the deployment lever is closed, the desexualization rate B detected by the desexualization rate sensor 25 is digitally displayed on the operation panel, etc. in step S6, and when the deployment lever is closed. When is open, proceed to step 37. The process moves to S8, and when the switch for opening the gap between both stripping rolls 6.7 is turned on in Step S7, the operation to open the gap between both stripping rolls 6.7 is performed in Step S9, and the operation to open the gap between both stripping rolls 6.7 is performed in Step S8. Turn on the switch to close the gap between the stripping roll 6.7
, by performing the operation of closing the gap between both JJQff rolls 6.7 in step SIO,
The gap between the two de-stretching rolls 6.degree. 7 is manually controlled so that the de-strengthening rate B digitally displayed on the operation panel etc. approaches the target fertilization rate Bo.

On the other hand, when the automatic switch for desiliconization control is turned on in step S4, it is determined in step Sll whether or not an X flag, which will be described later, is 1, and if X is not 1, the expansion mechanism is operated in step 512. When the deployment mechanism is not operated, that is, only when the deployment lever is closed, the process moves to the next step S13, and the load current A is set to the limit current Amax in the desexing motor 10 (desexing motor 10 For example, a value Ab (A
b=0.9XAmax), when A<Ab, that is, when the load current A exceeds Ab
When the Ab
On the other hand, when A<Ab, that is, when there is a margin with respect to the load current AfJ<Via degree current Amax, in step S15, the load current A is
Limit current Amax (Jet
For example, a value Ac (Ac=0.8
XAmax), and when A>Ac is not found, the load current A is controlled to exceed the Ac by closing the gap between the two tax culm rolls 6.7 in step S16, and A is If it is located between
After setting the X flag to 1 in step S17, the process returns to before step S4.

In this way, the load current A is changed to the limit current Ama
When the control is performed to be located between the value Ab, which is, for example, 90% of
19, the clocking of time T is started, and in the next step 320, it is determined whether or not the Y flag, which will be described later, is 1. If Y=1, then in step S21, an appropriate time T2 (for example, 10 seconds) is determined. elapsed, and
When Y=1, the appropriate time TI is set in step S22.
(for example, 5 seconds), step S23
The above-mentioned time measurement is stopped at step S24, and the load current A is read again at step S24 and the load current A at step 325, and then the process moves to the sensor-based automatic control of the de-stripping rate at step S26, which will be described below. That's what I do.

This sensor-type automatic control of the desexing rate is carried out according to the flowchart shown in FIG.

That is, in step S26a of FIG. 5, it is determined again whether the Y flag is 1, and if Y=1, then in step S26b, the desexualization rate B is set by an appropriate value β to be lower than the target desexualization rate Bo. Compared to the high value (Bo+β),
If B<Bo+β is not satisfied, a gap between both stripping rolls 6°7 is opened in step S26c, but B<Bo+β is not satisfied.
When , the tax culm rate B is set to the target desexing rate B in step S26d.

Compared with a value (Bo-β) lower by an appropriate value β than B>
When it is not Bo-β, in step S26e, the load current A and the limit current Amax are compared, and A>
When As+ax is not the case, the roll gap is closed in step 526f, but when A>Amax, the roll gap is closed in step 526f.
By opening the roll gap at 26 g, the load current A is prevented from exceeding the limit current A raax.
Automatic control can be performed so that the value falls within a relatively wide range between Bo+β and Bo−β under conditions where the value does not exceed Bo+β.

When the desexualization rate B is controlled to fall within a relatively wide range between BO+β and Bo−β in this way, the Y flag is set to 1 in step S26h, so that the Step 526 from S26a
Moving on to step i, the desexualization rate B is automatically controlled so as to fall within a narrower range than the above, that is, between BO+α and BO−α. However, it is 1αIIβ1.

First, in step 526i, the desexualization rate B and Bo+
If B<Bo+α is not satisfied, the roll gap is opened in step 526j to bring the stripping rate B closer to the target weighing rate BO, but when B<Bo+α,
In the next step S26k, the desexualization rate B and Bo-α are compared, and when B>Bo-α, step 8261
The Z1 flag and Z2 flag, which will be described later, are respectively zeroed and the process returns. However, when B>BO-α is not established, in step 326m, the load current A and the limit current A ma
When A > Amax, the load current A is increased by opening the roll gap in step S26n.
does not exceed the limit current Amax, while A>A
If it is not max, 21 at step 526°.
It is determined whether the flag is 1 or not, and if Z1=1, the process returns as is, but only if it is not Zl-1, the roll gap is closed in the next step S26p.
After bringing the deweighing rate B close to the target deweighing rate Bo, step S
In 26Q, it is determined again whether the 21 flag is 1,
When Z1 is not 1, the 22nd flag is set to 1 in step S26r, and the 21st flag is set to 1 in step S26s, and then the process returns.

As a result, the desexualization rate B is determined by the load current A being the limit current Ama
Under the condition that x is not exceeded, automatic control can be performed to fall within a narrow range between Bo+α and BO−α.

In the above flowchart, the X flag indicates that the load current A is once a value appropriately smaller than the jerk current A max (A
b-Ac), and the Y flag is used to remember whether or not the desexualization rate B has been controlled to become B-Ac).
The Z1 flag is used to remember whether or not the control has been performed so that it is between O+β and Bo-β, and the Z1 flag is used to record whether the operation to close the gap between the desiliconizing roll 6.7 has been performed twice. is used to remember whether z
2 flag is used for determining the Z1 flag,
It is used to remember whether the operation of closing the gap between the a-culm rolls 6.7 has been performed once or not.

[Brief explanation of drawings]

The drawings show embodiments of the present invention, and FIG. 1 is an enlarged longitudinal sectional front view of a rice hulling machine, FIG. 2 is a longitudinal sectional front view of a hulling and sorting device, and FIG. 3 is an enlarged sectional view taken along the line mm of FIG. 2. , FIG. 4, and FIG. 5 are diagrams showing flow sheets for controlling the desexualization rate. 2... Husker, 5... Paddy supply hopper, 6.7
...silicification roll, lO...aff motor, 11
... Actuator, 12 ... Gap adjustment mechanism, 1
4... Ammeter, 25... Tax culm rate sensor, 38
····Control device.

Claims (1)

[Claims] (1) A pair of de-■ rolls and a mechanism for adjusting the gap between the two de-■ rolls; A rice hulling machine comprising a sensor-type dehulling rate control means that detects the dehulling rate with a sensor and increases or decreases the gap between the two dehulling rolls so that the detected dehulling rate is equal to or substantially equal to a preset target dehulling rate. In,
A first control means for controlling the sensor type removal rate so that the removal rate falls within a relatively wide range sandwiching the target removal rate.
a second sensor for controlling the removal rate controlled by the first sensor-type removal rate control means so that the removal rate is within a narrow range sandwiching the target removal rate; What is claimed is: 1. A dehulling rate control device for a rice huller, comprising a type dehulling rate control means.