JPH0634933B2 - Derolling roll clearance control device for huller - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a dep roll clearance control device in a huller.

[Prior art]

When performing the hulling work while detecting and controlling the rate of paddy / rice in the removed rice by the removal rate sensor and adjusting and controlling the gap of the removing roll based on the removal rate, it is determined immediately after the start of the hulling operation. I can't get shavings and rice into the removal rate sensor. Therefore, for a while, hulling is performed while detecting the load current value of the removing roll driving motor and adjusting the gap of the removing roll based on the load current value.

[Problems to be Solved by the Invention] However, when adjusting the dep roll gap based on the dep rate, the control dep rate value is, for example, 78% to 9%.
Despite being set in the range of 0%, the control reference load current value is set at a rate of 84%, for example, when the gap of the removing roll is previously adjusted based on the load current value reference. This is the configuration.

Therefore, if the control reference value of the removal rate control happens to be 84% of the standard when the control based on the load current value is switched to the control based on the removal rate, the removal rate control reference When switched, it is adjusted relatively quickly within the range of the control reference removal rate value. However, for example, when a high or low 90% or 78% removal rate apart from the standard 84% is set as the control reference value, the control reference removal is performed when the removal rate control is switched to. It takes longer to adjust the rate.

Therefore, in the meantime, when hulled with a high depulping rate, problems such as skin rubbing and damage of the grain occur, or, when hulled with a low debuffing rate, to a hull roll. There has been a problem that a problem such as a decrease in efficiency occurs due to an increase in reduced grains.

[Problems to be solved by the invention]

The present invention is intended to solve the above problems, and has taken the following technical means.

That is, a pair of removing rolls 6 and 6 for hulling, a drive motor 24 that drives the removing rolls 6 and 6, and a drive motor 24.
A load current sensor 25 for detecting the load current value of the roller, a roll gap adjusting means for widely adjusting the gap between the removing rolls 6, 6, and a roll gap adjusting motor for driving the roll gap adjusting means to be wide and narrow. A removal rate sensor 20 for detecting the removal rate of rice, a load current value reference control operation means activated at the initial stage of hulling, and a removal operation activated subsequent to the load current value reference control operation means. In a dep roll gap control device comprising a rate reference control operation means, a reference dep rate setting means capable of artificially adjusting and setting the control reference dep rate value of the dep rate reference control operation means in advance,
From the related reference load current value setting means for changing and setting the control reference load current value of the load current value reference control operation means in relation to the high / low reference removal rate setting of the reference removal rate setting means. The dep roll clearance control device in the rice huller is as follows.

[Operation and effect of the invention]

At the start of the hulling work, when the mixed rice cannot be sampled by the dewatering rate sensor 20, first, the gap between the dewatering rolls 6 and 6 is adjusted by the load current value reference control operation means, and then the dewatering roll. A predetermined amount of the hulled rice that has been hulled in 6 and 6 is sampled, and it becomes possible to detect the shedding rate. When the shedding rate sensor 20 detects hull / rice discrimination data, the load current value described above is obtained. The control operation is switched to the removal rate reference control operation, and the gap between the removal rolls 6 and 6 is adjusted to be wide or narrow.

By the way, in the removal rate reference control operation, for example, the reference removal rate setting means is operated to set the control reference removal rate to 84%.
Can be set to 78% or 90% as a standard, and the reference control load current value, for example, the load current value related to the setting of the control reference removal rate of this size, is determined based on the experimental value. ± 2 with 7A (ampere, same below) as standard
A is set differently. Therefore, the low removal rate (78
%), The reference load current value is low (5 A), and in the case of a high removal rate (90%), it is high (9 A).
A) As the setting, it is possible to set the large and small reference control load current values related to the respective set reference removal rates.

Therefore, when the load control operation is switched to the removal rate control operation, the time until the control reference removal rate value adjusted and set by the reference removal rate setting means is shortened, and the above-mentioned paddy It is possible to solve the problems such as a decrease in efficiency due to an increase in the number of grains reduced to the sliding roll, or a scratch of the grain being damaged by the skin.

〔Example〕

 An embodiment of the present invention will be described with reference to the drawings.

The paddy hull sorting device is composed of a front upper removing device 1, a front lower blowing device 2, and a rear upper sorting device 3. The removing device 1 is composed of a paddy supply funnel 4, an opening control valve 5, a pair of removing rolls 6, 6, and the like.

The wind separation device 2 below the removing device 1 is configured to perform a wind separation process on the grain such as rice grains and pomegranate mixed in the removed rice with the dust collector 7.

Reference numeral 8 denotes a grain lifting machine that lifts the mixed rice after the hulling wind selection to the sorting device 3 part, and communicates with one side of the transfer gutter 9.

The sorting device 3 is provided with a cylindrical cylindrical casing 12 having a large number of pot holes 11, 11, ... , A mixed rice transfer gutter 13 and a brown rice transfer gutter 14 are provided in parallel. The mixed rice transfer gutter 13 is related to the fried machine 8 and has a configuration for transferring the mixed rice to the supply side of the selection cylinder 12 (rear side of the selection device 3). The brown rice transfer gutter 14 collects the brown rice scooped up by the pot holes 11, 11, ... I am trying. 16 is a brown rice extraction gutter, 1
7 is a brown rice lifting machine.

A large number of grain picking upper plates 18, 18, ... Are arranged on the discharge side of the sorting cylinder 12 to scoop up the paddy and a small amount of residual brown rice and lift the grains into the reducing gutter 19.

Reference numeral 20 denotes a depletion rate sensor composed of a floodlight and a light receiver, which accepts the grain sampled from the transfer portion from the mixed-rice lifting machine 8 to the mixed-rice transfer trough 13 to discriminate between paddy and brown rice. It is a composition.

That is, the output of the removal rate sensor 20 holds the peak value and enters the comparator 21, and is compared with the output of the D / A converter 22 which is the reference data, and the CPU 23 determines whether it is paddy or unpolished rice. , The removal rate is calculated after distinguishing the specified grain from paddy / brown rice.

The CPU 23 issues a command signal to rotate the control motor (not shown) in the normal rotation or the reverse rotation from the calculated removal rate so that the reference removal rate (for example, 84%) is arbitrarily selected from a plurality of types in advance. Is output to adjust the gap between the removing rolls 6 and 6 to be wide or narrow. The removal rate is, for example, 78% or 90% in addition to the above.
Etc. can be selected.

Immediately after the work is started, the sample particles cannot be taken into the removal rate sensor 20, so the load current value of the drive motor 24 that rotationally drives the removal rolls 6, 6 and the like is detected, and removal is performed based on the load current value. Adjust the gap between the rolls 6 and 6. That is, at the start of hulling work, the opening control valve 5 is closed, a manual lever (not shown) is operated to widen the gap between the removing rolls 6 and 6, and the no-load current value of the drive motor 24 is measured. After that, the gaps between the removing rolls 6 and 6 are narrowed so that the removing rolls 6 and 6 are slightly brought into contact with each other, and the removing rolls 6 and 6 are moved from the position of the slight contact.
The gap between the two is expanded by the timer set time, and, for example, 0.
Set to a gap of about 8 mm.

The CPU 23 fetches the load current value of the drive motor 24 via the load current sensor 25 and the comparator 21 and compares it with the output of the D / A converter 22 to remove a constant reference load current value. A control motor (not shown) for adjusting the gap between the rolls 6 and 6 is controlled to a wide side or a narrow side of the roll gap.

Further, the reference load current value is configured such that the CPU 23 automatically selects a certain fixed value based on the removal rate setting operation operation. For example, it is 7A for the adjustment setting of the removal rate of 84%, 9A for the adjustment setting of the high removal rate of 90%, and 5A for the adjustment setting of the low removal rate of 78%. It should be noted that these related constant current values are empirically and experimentally determined in advance so that the detected paddy / brown rice ratio of the mixed rice corresponds to each depletion rate.

The operation of the above embodiment will be described.

In the hulling / sorting operation, first, the load current value of the drive motor 24 is detected to perform the load current value control operation, and then the removal rate sensor 20 detects the removal rate of the removed rice to remove the removal rate. It is to shift to control operation.

That is, the no-load current value measurement of the drive motor 24 when the removing rolls 6 and 6 are not in contact-the fine contacting of the removing rolls 6 and 6-the initial roll gap adjustment is performed by expanding the removing rolls at the timer setting time. , Hulling work is started. Then, first, by the load current value control, the gap between the removing rolls 6 and 6 is changed to be wide or narrow so that the detected load current value of the drive motor 24 can ensure a constant reference load current value.

When the mixed rice comes to be circulated and circulated through a predetermined flow path in the machine during the load current value control, sample grains are taken into the dewatering rate sensor 20, and the dewatering rate of the sliding rice under load current value control is calculated. Then, the operation proceeds to the removal rate control operation.

That is, depending on the result of the depulling rate calculation, the depulling roll 6, which should gradually approach the preset deplacing rate, for example, 84%.
This shifts to the so-called removal rate control in which the gap 6 is adjusted and set.

By the way, the control reference removal rate for performing removal rate control is
It is adjusted and set in advance, and the CPU 23 compares and calculates the detected removal rate and the control reference removal rate, and removes the removal roll 6,
The roll gap is controlled by rotating the gap adjusting control motor (not shown) 6 in the normal or reverse direction. However, the load current value control in the preceding stage is performed in relation to the level of the set removal rate. The selected reference load current value is, for example, 7 A when the removal rate is 84%, 9 A when the removal rate is 90%, and 7 A when the removal rate is 90%.
When it is 8%, a predetermined constant value such as 5A is selected, and the load current value control is performed based on the selected reference load current value. The selection correspondence of these reference load current values is based on the experimental values, etc., and each decapsulation rate is the load current value that should be obtained properly, so during the preceding load current value control, The gap between the removing rolls 6 and 6 is adjusted at a similar rate. Therefore, when shifting to the subsequent removal rate control, the time until the control reference removal rate is adjusted can be shortened, and the hulling operation can be performed smoothly.

Incidentally, although the removal rate and the load current value are described by using numerical values for convenience, the related correspondences thereof are determined by conditions such as the initial removal roll gap, the amount of protrusion, and the functional capacity of the removal device 1. However, the values are not limited to the above values.

The sludge that has been hulled by the removing rolls 6 and 6 flows down to the wind sorting device 2, the rice husks are removed, and the grain arrives at the sorting device 3 via the grain elevator 8.

The mixed rice transported to the supply side of the sorting cylinder 12 by the mixed rice transfer trough 13 in the sorting cylinder 12 scoops up small brown rice in the pot hole with the rotation of the sorting cylinder 12, and the brown rice transfer trough. Dropped in 14, the large paddy is scooped low, dropped into the mixed rice transfer gutter 13 or the sorting cylinder 12, while flowing to the discharge side in sequence, and the grain reaching the end side of the sorting cylinder 12 is again It is returned to the removing device 1 and is subjected to the removing selection process.

[Brief description of drawings]

1 shows an embodiment of the present invention. FIG. 1 is an overall side sectional view, FIG. 2 is an electric circuit diagram, and FIG. 3 is a flow chart. In the drawing, 1 is a removing device, 2 is a wind selecting device, 3 is a selecting device, 5 is an opening control valve, 6 and 6 are removing rolls, 12 is a selecting cylinder, 20 is a removing ratio sensor, and 23. Is a CPU and 24 is a drive motor.

Claims (1)

[Claims] 1. A pair of removing rolls 6, 6 for hulling, a drive motor 24 for driving the removing rolls 6, 6, and a load current sensor 25 for detecting a load current value of the drive motor 24.
Roll gap adjusting means for adjusting the gap between the removing rolls 6 and 6 to a wide range, a roll gap adjusting motor for driving the roll gap adjusting means to a wide range, and a removing rate sensor for detecting a removing rate of the ejected rice. 20, a depletion roll gap control including a load current value reference control operation means that is activated at the beginning of hulling, and a depletion rate reference control operation means that is activated following the load current value reference control operation means. In the device, a reference depletion rate setting means capable of artificially adjusting and setting the control reference depletion rate value of the depletion rate standard control operation means in advance,
From the related reference load current value setting means for changing and setting the control reference load current value of the load current value reference control operation means in relation to the high / low reference removal rate setting of the reference removal rate setting means. De-rolling roll gap control device for Nara huller.