JPS63278556A - Controller for rice-hulling selector - 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 is a huller sorting system in which paddy is dehulled by a huller mechanism, and then only brown rice is sorted and taken out from the grained rice after dehulling. The invention relates to a control device for a machine.

[Conventional technology]

In order to control the dehulling rate in the hulling mechanism used in this type of hulling and sorting machine, it is necessary to The so-called sensor-type dehulling method detects the dehulling rate of fallen rice with a dehulling rate sensor, and increases or decreases the gap between the two tax culm rolls so that the dehulling rate becomes approximately equal to a preset target dehulling rate. Rate control is employed.

On the other hand, for sorting brown rice from the rice that has fallen off after the tax culm, a rotary sorting mechanism is used in which a brown rice catcher is installed inside a horizontally rotating sorting cylinder that has many recesses formed on its inner circumferential surface. In this rotary sorting mechanism, the fallen rice fed into the sorting barrel is scraped up to a height created by the rotation of the sorting barrel, and then falls to the bottom. While the unpolished rice is stuck in the recess and lifted up to a high position and then falls, the paddy in the unpolished rice continues to fall from a lower position than the unpolished rice. This method is used to catch brown rice falling from a high position into a brown rice catcher and take it out, but in this case, the fluidized bed of fallen rice in the sorting barrel must have a certain thickness. In particular, if the amount of rice that has fallen off in the sorting barrel is small and the fluidized bed is thin, the amount of rice that has fallen off will rise due to the rotation of the sorting barrel, increasing the amount of paddy that enters the brown rice catcher. Therefore, the accuracy of sorting brown rice decreases.

Therefore, Japanese Patent Application Laid-Open No. 60-156559 discloses that in a hulling sorting machine using a rotary sorting mechanism, the amount of scraped rice in the sorting barrel of the rotary sorting mechanism, that is, the amount in the barrel, is set within the barrel at a predetermined setting. an in-shell amount control means so as to reduce the amount of paddy supplied to the hulling mechanism when the amount is greater than the amount in the hull, and increase the amount of paddy supplied to the hulling mechanism when the amount in the hull is less than a predetermined amount in the hull; It is proposed to maintain the internal cylinder volume approximately equal to a predetermined set internal cylinder volume by providing the following.

[Problem that the invention seeks to solve]

However, when the above-mentioned sensor-type dehulling rate control means and in-shell amount control means are applied simultaneously to a hulling sorter using a rotary sorting mechanism, the following problems occur. .

That is, when the amount of paddy supplied to the hulling mechanism is increased in response to a decrease in the amount in the sorting barrel, an overload occurs on the culling motor that drives both aff rolls in the hulling mechanism, and the r! The load current of A culm motor is y! If the current limit for the A culm motor is exceeded, the breaker will operate, causing the desiliconization motor and eventually the hulling sorting work to stop unexpectedly, or the AF motor to burn out. As the de-sexing rate in the hulling mechanism decreased, the accuracy of sorting brown rice decreased.

The present invention prevents the above-mentioned problems from occurring when a sensor-type dehulling rate control means and a shell amount control means are used simultaneously in a hulling sorter using a rotary sorting mechanism. The purpose is to

[Means to solve the problem]

For this reason, the present invention is provided with a hulling mechanism and a rotary sorting mechanism in which a brown rice receiving trough is provided in a horizontally rotating sorting barrel with a large number of recesses formed in the inner peripheral surface, and When the amount of fallen rice in the barrel is larger than a predetermined set amount in the barrel, the amount of paddy supplied to the hulling mechanism is reduced, and when the amount in the barrel is less than the predetermined set amount in the barrel, the amount of paddy supplied to the hulling mechanism is reduced. The apparatus further includes an in-body amount control means configured to increase the supply amount of a, and further detects the dehulling rate of the rice that has been removed after the hulling by the hulling mechanism.
In the hulling sorter comprising a sensor-type dehulling rate control means for increasing or decreasing the gap between the two culm rolls in the hulling mechanism so that the ff rate is equal to or substantially equal to a preset target dehulling rate, an overload prevention means for opening a gap between the two desiliconization rolls when the load current of a desiliconization motor that drives both tax culm rolls exceeds a limit current in the desiliconization motor; and the overload prevention means are activated. The apparatus is configured to include means for shifting the set internal cylinder amount to a larger side when the amount is increased.

[Action/effect of the invention]

In this configuration, when the amount of paddy supplied to the hulling mechanism is increased by the internal amount control means, when the load current of the desiliconization motor in the hulling mechanism exceeds the limit current of the malleable motor, an overload occurs. The prevention means is activated and both aff
Since the gap between the rolls is opened and the load current of the desiliconizing motor is reduced, it is possible to prevent the desiliconizing motor from being overloaded.

However, by opening the gap between both tax culm rolls when the load current of the AN motor exceeds the limit current, the de-stripping rate of the rice that has fallen off after the A-culm becomes lower than the target de-hulling rate. The dehulling rate of dropped rice in the sorting barrel of the rotary sorting mechanism also decreases, and in other words, the ratio of dropped rice to paddy in the sorting barrel increases, so the frequency of paddy flying up toward the brown rice catcher increases. As a result, the accuracy of sorting brown rice decreases.

In contrast, in the present invention, when the overload prevention means is activated, the predetermined set amount in the cylinder is shifted to the larger side in the cylinder amount control means. When the ratio of dropped rice in the sorting barrel increases, the amount in the barrel becomes larger than the set amount in the barrel, and it is possible to prevent the paddy from flying up high. This can prevent a decline in sorting accuracy.

Therefore, according to the present invention, overloading of the desiliconization motor in the hulling mechanism can be reliably prevented without causing a decrease in the accuracy of sorting brown rice, so that the accuracy of sorting brown rice can be maintained at a high value. It has the effect of allowing continuous operation to be carried out safely.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. The rice hulling sorting machine includes a horizontally long box-shaped wind selection mechanism 1, a hulling mechanism 2 mounted on the upper left surface of the wind selection mechanism 1, and The entire system is composed of a rotary sorting mechanism 3 mounted on the upper right side of the mechanism 1.

The hulling mechanism 2 includes a case 4 with a paddy supply hopper 5;
A pair of left and right deculling rolls 6.7 provided in the case 4;
The aff rolls 6 and 7 are equipped with a manual opening/closing shutter 8 and a paddy supply amount adjustment valve 9, and both of the aff rolls 6 and 7 are rotationally driven by a desiliconization motor 10 provided inside the wind selection mechanism 1, and one of them is The desilicating roll 6 is of a fixed position type, but the other Ml roll 7 is configured to move toward or away from the one desiliconizing roll 6 by a gap adjustment mechanism 12 driven by an actuator 11. Further, the paddy supply amount regulating valve 9 is configured to be opened and closed by an actuator 13.

In this case, the 1tiPJ motor 10 is equipped with an ammeter 14 for detecting its load current A, and the paddy supply amount regulating valve 9 is equipped with a positioner for detecting its opening position.
15 are provided respectively, and both tax culm rolls 6.7 are provided with:
A deployment mechanism (not shown) is provided that opens the gap in priority over the gap adjustment mechanism 12 in an emergency.

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 husked rice wind sorting unit 18 is located almost directly below the hulling mechanism 2 and wind-sorts the chaff from the husks from the husked rice after dehulling.
The fallen rice after wind selection is transferred to the 2 o's fallen rice trough with a spiral conveyor 21.
The brown rice is sent to the rotary sorting mechanism 3 by the packet conveyor 22, and the brown rice wind sorting section I9 further performs finishing wind sorting on the brown rice sorted by the rotary sorting mechanism 3. The finished brown rice is sent to brown rice gutter 23 with a spiral conveyor.
The packets are taken out of the machine by the packet conveyor 24.

In this case, power is transmitted from the desiliconization roll 6.7 to each spiral conveyor 21, packet conveyor 22.24, and both fans 16.17, and also to the winding section 18 for scraped rice or to the fan 16.17. In the middle of the scraped rice conveyance path from the scraped rice wind retreat section 18 to the rotary sorting mechanism 3, there is provided a peeling rate sensor 25 for detecting the peeling rate B of the scraped rice.

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

This re-sorting cylinder 27 has one end farther from the hulling mechanism 2 on the supply side 27a and the other end closer to the hulling mechanism 2 on the discharge side 27a.
A large number of recesses 31 are formed on the inner surface of each of the recesses 31, each having a size large enough to fit brown rice.

Further, inside the re-sorting cylinder 27, a brown rice receiving trough 32 with a V1 rotary conveyor is provided, and the brown rice receiving trough 3
A dropped rice receiving trough 33 with a spiral conveyor is installed adjacent to 2.

The fallen rice sent from the packet conveyor 22 is
Approximately equal amounts of rice enter the two sliding rice receivers 33 through the chute 34, and the two sliding rice receivers 33 collect the sorting cylinder 2.
While being supplied to the supply side 27a in the brown rice receiving troughs 32, the brown rice is configured to join the chute 35 and then fall into the brown rice winnowing 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 the paddy removing mechanism 2
There is a paddy return chute 3 between the paddy supply hopper 5 and the paddy supply hopper 5.
7 is mounted thereon, and is configured to return paddy to the paddy supply hopper 5.

Furthermore, a sensor plate 39 is rotatably provided in the raw sorting cylinder 27 and comes into contact with the fluidized bed of fallen rice in the sorting cylinder 27. An internal amount sensor 40 is connected to detect the thickness of the fluidized layer of fallen rice in the sorting cylinder 27, that is, the amount Q inside the cylinder, depending on the moving angle.

Reference numeral 38 receives signals from the ammeter 14, the dehulling rate sensor 25, and the body amount sensor 40, and operates the gap adjustment mechanism actuator 11 and the paddy supply amount adjustment valve actuator 13 as appropriate. It is an electronic control device for

As described in the following embodiments, this electronic control device 38 closes the paddy supply M control valve 9 when the in-shell amount i1Q is larger than a predetermined set amount Qo in the shell, so that the amount Q in the shell becomes a predetermined amount. an in-hull amount control means that opens the paddy supply amount regulating valve 9 when the amount is less than a set in-hull amount Qo; A sensor-type tax rate control means for increasing or decreasing the gap between the regular culm rolls 6.7, and a load current A of the regular culm motor 10 are set to an overload prevention means that opens a gap between the two a-culm rolls 6.7 when the current value exceeds the current value when the current value is activated; and means for shifting the amount β to the larger side.

This will be explained in detail with reference to the flowcharts of the embodiment shown in FIGS. 4 and 5. FIG. 4 shows a flowchart for controlling the desexualization rate, and FIG. 5 shows a flowchart for controlling the amount inside the body. It is something that progresses.

First, in the flowchart of FIG. 4, following the start (step S1 sets the preset target dehulling rate Bo, step S2 sets the dehulling rate B of the fallen rice, and step S3 sets the load current of the standard culm motor 10). A is read respectively, and then in step S4, the wln rate B is compared with a value (BO+α) higher than the target desexualization rate Bo by an appropriate value α (BO+α), and when B<BO+α, in step S5 both desexualization rolls 6.7
After opening the gap, the process returns, but when B<BO+α, in step S6, the aff rate B is compared with a value (Bo−α) lower than the target desexualization rate BO by an appropriate value α,
When B>Bo-α, return as is, and B>Bo
-α, the load current A and the limit current Amax are compared in step S7, and if A>Amaxx is not true, the boat While closing the gap, when A>Al1ax, the boat
．． By opening the gap 7 and returning, the load current A is prevented from exceeding the limit current A max.
Under the condition that aax is not exceeded, the above BO+α and Bo−
It is possible to automatically control the value to fall within the range between α and α.

On the other hand, in the flowchart of FIG. 5, the preset internal body amount Qo is
In step S13, the inside of the shell 11Q is read, and then, in step S14, it is determined whether the boat X in the flow chart of FIG. 4 is in the H position,
When boat X is not in the H state, that is, when boat When Q<Qo, that is, when the amount Q in the shell is smaller than the set amount Qo in the shell, the process returns after opening the paddy supply N control valve 9 in step S16, and returns if Q<Qo. Sometimes step S1
In step 7, the internal body amount Q is again compared with the set internal body 1iQO,
If Q>Qo, it returns as is, but Q
> When the inside shell iQ is larger than the set inside shell amount QO, in step S1B, the paddy supply N control valve 9 is closed and operated and then returned, so that the inner shell amount Q is approximately equal to the set inner shell amount Qo. The amount of paddy supplied to the hulling mechanism 2 is controlled to increase or decrease so that it becomes equal.

Then, when the boat The desexualization rate B is the target desexualization rate BO
If it is lower than 1iQo, the process moves to step S19, where the set internal body amount Qo is appropriately shifted to the larger side by the value β, this QO+β is set as the set internal body amount 1iQo, and the process moves to step S15. Accordingly, the amount of paddy supplied to the hulling mechanism 2 is controlled to increase or decrease so that the amount in the shell becomes QO+β.

[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 control flow sheets. 2... Hulling mechanism, 3... Rotary sorting mechanism, 5...
...Paddy supply hopper, 6,7...Desiliconizing roll, 9
...Paddy supply II control valve, 10...Cull removal motor,
14...Ammeter, 25...Desexualization rate sensor, 2
7... Sorting barrel, 32... Brown rice catcher, 39...
・Sensor plate, 40...Inner body amount sensor, 38...
··Control device.

Claims (1)

[Claims] (1) comprising a hulling mechanism and a rotary sorting mechanism in which a brown rice catcher is provided in a horizontally rotating sorting barrel with a number of recesses formed in the inner circumferential surface; When the amount of fallen rice in the shell is larger than a predetermined set amount in the shell, the amount of paddy supplied to the hull removal mechanism is reduced, and when the amount in the shell is less than the predetermined set amount in the shell, the amount of paddy is supplied to the hull removal mechanism. The rice hull is equipped with an in-body amount control means configured to increase the amount, and further includes a removal rate of the scraped rice after being removed by the hulling mechanism, and this removal rate is equal to a preset target removal rate. A rice hulling sorting machine comprising a sensor-type dehulling rate control means for increasing or decreasing the gap between both dehulling rolls in the hulling mechanism so that the two dehulling rolls are approximately equal,
When the load current of the removal motor that drives the both removal rolls exceeds the limit current in the removal motor, the both removal
A rice huller sorting method comprising: overload prevention means for opening a gap between the rolls; and means for shifting the set barrel internal amount to a larger side when the overload prevention means is activated. Machine control device.