JPH04200650A - Regulating device for gap of husking roll in rice husking and sorting machine - Google Patents

Abstract

PURPOSE:To prevent both damage of grains and uneven wear of husking rolls by transferring regulation of the gap of husking rolls to load current control from husking ratio control when the prescribed husking ratio higher than the standard husking ratio is set by a husking ratio setting switch. CONSTITUTION:Husking ratio is detected by a husking ratio sensor 26 during rice husking and sorting work. The gap of husking rolls 3, 3 is controlled on the basis of the controlled reference husking ratio. Further, when the preset husking ratio is changed over to the husking ratio higher than the standard ratio (e.g. 85%) by a husking ratio setting switch 36, regulation of the gap of the husking rolls 3, 3 is changed over to load current control due to a load current sensor 32 from husking ratio control due to the husking ratio sensor 26. Load current value of the husking rolls 3, 3 is detected by the load current sensor 32 and compared with the controlled reference load current value. When this detected load current value is deviated from the controlled reference load current value, rice husking and sorting work is performed while regulating the gap of husking rolls 3, 3 so that the detected load current value is reset to the controlled reference load current value.

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a hulling roll gap adjustment device provided in a hulling and sorting machine that is equipped with a hulling section that performs hulling work and a mixed rice sorting section. It is related to.

[Prior art and problems to be solved by the invention] A husking section that performs hulling work using a pair of husking rolls, and a rotary sorting system that rotates around a horizontal axis and has a large number of pot holes on its inner circumferential surface. There is a hulling sorting machine that is equipped with a mixed rice sorting section that sorts a mixture of paddy and brown rice using a cylinder or a swinging sorting plate, etc. In such a hulling sorting machine, the gap between the hulling rolls is automatically adjusted. Some models are equipped with a shedding rate control function and a load current control function. That is, the shedding rate of the rice scraped off by the dehulling roll is detected by the shedding rate sensor, and the detected shedding rate is compared with the control standard shedding rate. If the pulping rate deviates from the standard pulping rate, the gap between the hulling rolls or the paddy supply control valve may be adjusted and controlled to return to the control reference pulping rate, or the hulling rate may be adjusted by detecting the load current value of the hulling roll. This is a type of control that adjusts and controls the gap between the stripping rolls to return to the control reference load current value when the detected load current value deviates from the control reference load current value. There is something.

In addition, when hulling with a paddy roll, if you use the paddy roll with a high pulp rate that is higher than the standard, large grains of paddy will be hulled, but small grains will not be hulled. There is a tendency that the hushed rice is composed of hulled brown rice and small and coarse paddy grains, and the difference in voltage between the hulled rice and paddy grains is small, and the voltage for determining the paddy grains is smaller than that of brown rice. The detected shedding rate tends to be lower than the actual shedding rate.

For machines equipped with this type of shedding rate sensor, if the control standard shedding rate is set higher than the standard, if the shedding rate control is continued, the gap between the shedding rolls will be adjusted to be narrower. This causes problems such as damage to the grains and uneven wear of the shredding rolls.

Therefore, the present invention aims to solve these problems and improve the accuracy of gap control of the depulping rolls.

[Means to solve the problem]

The technical means of the present invention for solving such technical problems includes a roll gap adjustment means 37 for adjusting the gap between a pair of husking rolls 3. Dehulling rate sensor 2 that can detect the shedding rate of dropped rice
6. It is equipped with a load current sensor 32 that can detect the load current of the skimming rolls 3, 3, and a skimming rate setting switch 36 that can adjust and set the control standard skimming rate, and the skimming rate control detected by the skimming rate sensor 26 is based on the reference arm. In a rice hulling sorting machine that can adjust the gap between the husking rolls 3°3 to obtain the desired pulp ratio, and also adjust the gap between the husking rolls based on the load current.

In connection with the fact that a predetermined shedding rate higher than the standard shedding rate is set with the shedding rate setting switch 36, the spacing between the scraping rolls is adjusted from the shedding rate control of the shedding rate sensor 26 to the load current sensor 3.
The present invention provides a configuration of a dehulling roll gap adjustment device for a hulling and sorting machine, which is characterized by shifting to the load current control described in No. 2.

[Operation and Effect of the Invention] During the hulling and sorting work, the hulling rate of the hulled rice that has been hulled by the hulling rolls 3, 3 is detected by the hulling rate sensor 26, and compared with the control standard hulling rate. Hulling and sorting work is performed while adjusting the gap between the hulling rolls 3, 3 by the roll gap adjusting means 37 so that the detected hulling rate of the dropped rice becomes the control reference hulling rate.

In such hulling sorting work, when the hulling ratio set by the hulling ratio setting switch 36 is switched to a predetermined hulling ratio that is higher than the standard hulling ratio, for example, 90%, the gap yiiiin of the hulling rolls is increased. The shedding rate control by the shedding rate sensor 26 is switched to the load current control using the load current sensor 32, and the load current value of the shedding roll 3.3 is changed to the load current sensor 3.
2, the detected load current value is compared with the control reference load current value, and when the detected load current value deviates from the control reference load current value, the gap between the stripping rolls 3 and 3 is adjusted so as to return to the control reference load current value. This is used to perform hulling sorting work.

Therefore, when the shedding rate setting switch 36 is switched to a higher rate than the standard, for example 90% or more, the shedding rate detected by the shedding rate sensor 26 tends to be lower than the actual shedding rate. Therefore, it is highly likely that the control standard for adjusting the gap between the dehulling rolls is a dehulling rate that is several percent higher than 90%, and the gap between the dehulling rolls is narrowed and the grain is damaged. In some cases, problems such as uneven wear of the depulping roll 3 may occur, but in this invention, since the depulping rate control can be switched to load current control, such problems can be prevented. It is.

[Example] An embodiment of the invention shown in one drawing will be described below.

First, the configuration of the embodiment will be explained. 1 is a paddy hopper 2. A pair of depu rolls 3,
It is made up of 3rd grade. 4 is a sliding rice wind selection path, in which the separating air generated by the suction fan 5 in front of the rice sloughing section 1
The rice husks are discharged from the machine through a suction fan 5 and a dust exhaust tube 6, and the mixed rice of brown rice and paddy is supplied by falling into a rice receiving trough 7 located below. The mixed rice that has fallen into the fallen rice receiving trough 7 is transferred to a mixed rice hopper 9 by a mixed rice lifting machine 8.
The rice is fried and supplied from the mixed rice hopper 9 to the starting end of the supply gutter 14 in the rotary sorting cylinder 11.

Reference numeral 10 denotes a sorting case, and inside the sorting case 10, a rotary sorting cylinder 11 having a large number of pot holes Lla, lla, . The end portion (right side in FIG. 1) and the discharge side end portion (left side in FIG. 1) are rotatably supported by drive rollers 12°12. Inside this rotary sorting cylinder 11, there is a supply gutter 14 with a feed helix 13 and a finishing rice gutter 1 with a finishing rice helix 15.
6 is suspended horizontally.

The feed gutter 14 and the finished rice @ 116 are transferred to the rotary sorting tube 11.
As shown in FIG. The mixed rice disposed on the side rotating downward and scraped up low by the pot holes 11a, 11a, etc. of the rotary sorting cylinder 11 falls into the supply @ 14, and is transferred to the terminal side of the supply @ 14 by the supply helix 13. The feed ff 114 also functions as a mixed rice receiving trough.

The discharge side end of the finished rice gutter 16 is communicated with the finished rice receiving gutter 19 via the finished rice flow lower cylinder 17 and the finished rice flow grain plate 18,
The brown rice is wind-selected while falling from the finishing rice flow lower tube 17 and the finishing rice grain plate 18 to the finishing rice receiving trough 19, and the finished rice amount is 4i.
The brown rice that has flown down to i19 is taken out of the machine via the finished rice lifting machine 20.

The grains, mainly consisting of unhulled rice, flowed to the discharge side end of the rotary sorting ill and fall into the lower paddy receiver 21, and are sent to the hulling section 1 through the return paddy passage 23 in the paddy hoisting machine 22. After being reduced, it is subjected to the dehulling action again in the dehulling section 1.

The lower part of the front end of the sorting case 10, that is, the lower part on the side of the shedding part 1,
It is pivotally supported by a horizontal shaft 24, and supports the rear part of the sorting case 10 and the rotary sorting tube 11 so as to be adjustable in the vertical direction.
Reference numeral 25 is an inclination adjusting means for adjusting the inclination of the sorting case 10.

Next, FIGS. 3 to 5 will be explained.

Reference numeral 26 denotes a hutting rate sensor that includes a light emitting element and a light receiving element and is capable of detecting the hutting rate of the scraped rice from the husking section 1. This hutting rate sensor 26 is connected to a sample hold circuit 27. , A/D
The standard opening degree of the paddy supply control valve 29 of the husking section 1 is inputted via the conversion circuit to the arithmetic control section 28, which consists of a CPU that employs an arithmetic section and a register section, a program memory, and a calculation memory. Supply amount setting switch 3 to set the
A load current sensor 32 that can detect the load current of the motor 31 that drives the 0° dehulling rolls 3, 3 and/or the huller.
Power supply voltage sensor 33. A power supply frequency sensor 34, a shutter opening sensor 35 for detecting the opening degree of the paddy supply control valve 29, and a hutting rate setting switch 36 for setting the hutting rate are connected to the arithmetic control unit 28. ing.

Further, a roll gap adjustment motor 38 which adjusts a roll gap adjustment means 37 which adjusts the roll gap between the de-pulping rolls 3, 3 is connected from the arithmetic control unit 28 via the output interface and the drive circuit. Shutter opening degree to open and close the paddy supply control valve 29! This configuration is such that a control command signal is output to the JR motor 39.

Next, the control contents of the arithmetic control section 28 will be explained.

(1) First, the husking rate setting switch 36 and the supply amount setting switch 30 are set to predetermined scales, and when the operation switch (not shown) is operated, each rotating part of the hulling and sorting machine is driven.

Then, the initial gap setting control of the demolition rolls 3, 3, i.e.,
A control command signal from the arithmetic control unit 28 is sent to the roll gap adjustment motor 38, the roll gap adjustment means 37 is operated, and the gap between the depulping rolls 3 is opened for a predetermined period of time, which is detected by the load current sensor 32. When a non-contact state in which the load current value does not change is detected, the gap between the deburring rolls 3 and 3 is narrowed and the
Next, when an increase in the load current is detected and slight contact between the de-pulping rolls 3, 3 is detected, the roll gap adjusting means 37 is activated for a predetermined period of time.
The initial gap (for example, 1 mm) is set by adjusting the amount and opening the gap between the scraping rolls 3 for a predetermined period of time.

(2) Next, an opening command signal from the arithmetic control section 28 is output to the shutter opener w4 node motor 39 for a predetermined period of time.

The paddy supply control valve 29 of the husking section 1 is set to a predetermined opening degree (for example, 10
The initial opening is set to 5 mm), and the hulling work is started. Next, a control command signal is sent to the shutter opening adjustment motor 38 based on the control reference value set by the supply amount setting switch 30. Then, the paddy supply control valve 29 is adjusted to the set opening degree.

■Then, the removal rate control is started, and first, the removal rate sensor 26
The light intensity is adjusted so that one light emitting element has an appropriate light intensity for distinguishing between paddy and brown rice, and then the voltage signal of the grain that has passed through the hulling rate sensor 26 is sent to the sample hold circuit 27 and A/D converter. The voltage signal is input to the calculation control unit 28 via the circuit, and the voltage signal is directly input to the calculation control unit 28 to calculate the shedding rate.

■Next, the calculated shedding rate by the shedding rate sensor 26 is compared with the control reference electric power rate set by the shedding rate setting switch 36 in the arithmetic control unit 28, and the control reference electric power rate is determined from the calculated shedding rate. is high or low, an open or close command signal is output to the roll gap adjustment motor 38 or the shutter opening degree adjustment motor 39, and the gap between the husking rolls 3 and 3 or the paddy supply control valve 29 is adjusted to the desired position. It is adjusted to the open side or close side by a fixed amount, and if the calculated shedding rate is within the range of the reference electric rate, no control command signal is output, and the gap or opening is maintained as it is. This is where the rice hulling work is done.

■In this kind of hulling sorting work, the shedding rate set with the shedding rate setting switch 36 is the standard rate (for example, 85%).
When the predetermined pulp rate is switched to a higher predetermined rate, for example, 90%, the gap adjustment of the scraping rolls is switched from the scraping rate control by the scraping rate sensor 26 to the load current control by the load current sensor 32. The load current value of Proroll 3.3 is detected by the load current sensor 32 and compared with the control reference load current value, and when the detected load current value deviates from the control reference load current value, the load current value is returned to the control reference load current value. The hulling and sorting work is carried out without adjusting the gap between the dehulling rolls.

Therefore, if the setting shedding rate switch 36 is switched to a high rate higher than #A level, for example 90% or more, the shedding rate detected by the shedding rate sensor 26 will be lower than the actual shedding rate. Therefore, there is a high possibility that the control standard for adjusting the gap between the dehulling rolls will be based on a dehulling rate that is several percent higher than 90%, which will narrow the gap between the dehulling rolls and damage the grain. In some cases, problems such as uneven wear of the depulping roll 3 may occur, but in this invention, since the depulping rate control can be switched to load current control, such problems can be prevented. It is.

Further, in this embodiment, when the shedding ratio setting switch 36 is set to a high pulp ratio, the adjustment control of the scraping roll gap is changed from the shedding ratio control by the shedding ratio sensor 26 to the load current control using the load current sensor 32. However, when a high pulp rate is set, the reference voltage for determining paddy/brown rice may be corrected by a predetermined amount toward the brown rice side, or the peeling rate detected by the hulling rate sensor 26 may be adjusted. It may be configured such that the shedding rate is adjusted by a predetermined percentage to be corrected and the shedding volume control by the shedding rate sensor 26 is continued.

In addition, in order to control the load current of the gap between the stripping rolls using the load current sensor 32 mentioned above, a stop current setting switch ('I@, not shown) for the main motor 31 is provided to prevent the main motor 31 from stopping due to overload. 5. Configuration that can adjust and set the current value A configuration that can adjust and set the stop current value corresponding to the power supply voltage may also be added. Main motor 3 based on the power supply voltage
If you decide on the stop current value in step 1, when the grain dryer and huller sorter work at the same time, the voltage may drop to about 90% of the power supply voltage, and in such cases the breaker will often trip. The rice huller may fall and the rice huller may stop. However, in such a case, the stop current value is set to the main motor 31.
By operating the stop current setting switch (not shown) and setting it to a low value.

This prevents the breaker from tripping and enables efficient hulling and sorting work. In addition, if the breaker trips one or more predetermined times within a predetermined period of time, the dehulling roll gap is widened by a predetermined amount, or the opening degree of the paddy supply control valve 29 is narrowed by a predetermined amount, or A similar effect can be expected even if a configuration is added to set and adjust these control base $ values to the side where the load current is lowered by a predetermined amount, and the load current value of the main motor 31 is adjusted to the side where the load current value is lowered. .

Next, the operation of the embodiment will be explained.

When carrying out hulling work, feed the paddy to the paddy hopper 2,
Drives each rotating part of the rice huller and sorter. Then, paddy hopper 2
The paddy supplied to the dehulling rolls 3 and 3 is subjected to the dehulling action, the scraped rice is wind-selected in the lower scraped rice wind sorting path 4, and the rice husks are discharged from the dust exhaust pipe 6 to the outside of the machine. . Mixed rice of brown rice and paddy is
The dropped rice is dropped into the receiving trough 7, and then passed through the mixed rice hopper 9 in the mixed rice lifting machine 8 to the feeding trough 14 on the side of the rotary sorting cylinder 11.
The raw material is lifted up and supplied to the starting end side of the rotary sorter 1i1i11 by the supply helix 13 in the supply 4i114.

Next, the mixed rice is scraped up by the pot holes 11a, lla, . . . of the rotary sorting tube 11 rotating clockwise in FIG.
116, the mixed rice of long grain paddy and some brown rice is scraped up low and sent to the supply gutter 14 or the rotating sorting WJl.
1 and are sorted.

Then, the unsorted mixed rice that has fallen into the supply gutter 14 is again supplied into the rotary sorting cylinder 11 from the conveyance end of the supply @14 by the supply helix 13, and is re-sorted.

In addition, brown rice that has fallen into the finishing rice gutter 16 is removed from the finishing rice helix 1.
5, the rice is conveyed to the finishing rice flow lower tube 17, passing through the finishing rice grain plate 18 and falling to the finishing wooden tray @ 19, where it is screened by a sorting wind and taken out of the machine by the finishing rice lifting machine 20. be.

Further, the grains mainly consisting of unhulled rice after sorting sent to the discharge side end of the rotary sorting tube 11 flow into the lower paddy receiving trough 21,
The paddy is returned to the reduced paddy passage 23 by the paddy hoisting machine 22, and is again subjected to the husking action in the husking section 1.

During the hulling and sorting work as described above, the hulling ratio is checked by the hulling ratio sensor 26, and the gap between the hulling rolls 3 and 3 is controlled based on the control reference hulling ratio. When the rate setting switch 36 is operated to set a high persuasion rate higher than the standard (for example, 9
0%), the skipping rate control is switched to load current control. Therefore, when the control reference value for the shedding rate control is set to a high expected rate, the shedding rate detected by the shedding rate sensor 26 tends to be lower than the actual shedding rate, and There is a high possibility that gap adjustment is performed based on a shedding rate that is several percent higher than the control standard shedding rate of 90%, and the narrowing of the gap between the fluffing rolls may cause damage to the kernels or the failure of the fluffing rolls 3. Although problems such as uneven wear may occur, this embodiment can prevent such problems.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a cutaway side view, FIG. 2 is a cutaway rear view, FIG. 3 is a block circuit diagram, FIG. 4 is a flowchart, and FIG. is a cutaway side view. Explanation of symbols 1 Dehulling section 1 2 Paddy hopper 3 Dehulling roll 4 Dropped rice sorting channel 5 Suction fan 6 Dust exhaust tube 7 Dropped rice catcher 8 Mixed rice grain lifting machine 10 Sorting case 11 Rotary sorting tube 11a Jar hole
12 Drive roller 13 Supply helix 14 Supply gutter 15 Finished rice helix 16 Finished rice @ (grain receiving gutter) 17 Finished rice flow lower tube 18 Finished rice flow grain board 19 Finished rice receiving gutter 20 Finished rice grain lifting machine 21 Paddy receiving gutter
22 Paddy hoisting machine 23 Reduction paddy passage 24 Horizontal shaft 2S Inclination adjustment means 26 Nulling rate sensor 27 Sample hold circuit 28 Arithmetic control section 29 Paddy supply control valve 30 Supply amount setting switch 31 Main motor 32 Load current sensor 33 Power supply voltage sensor 34 Power frequency sensor 35 Shutter opening sensor 36 Threading ratio setting switch 37 Roll gap adjustment means 38 Roll gap adjustment motor 39 Shutter opening adjustment motor procedure correction band (method)

Claims (1)

[Claims] [1] A roll gap adjustment means 37 that adjusts the gap between the pair of husking rolls 3 and 3 for hulling, and a husking rate sensor that can detect the husking rate of the rice that has been rubbed off by the husking rolls 3 and 3. 26
, a load current sensor 32 that can detect the load current of the skimming rolls 3, 3, and a skimming rate setting switch 36 that can adjust and set the skimming rate as a control standard, and the skimming rate detected by the skimming rate sensor 26 is the control standard. In a hulling sorter that can adjust the gap between the husking rolls 3 and 3 to achieve the husking rate and also adjust the gap between the husking rolls based on the load current, the husking rate setting switch 36 can be used to adjust the husking rate from the standard husking rate. In connection with the fact that a high predetermined shedding rate has been set, the shedding rate sensor 2 adjusts the gap between the scraping rolls.
A husking roll gap adjustment device for a hulling sorter, characterized in that the husking rate control of No. 6 is shifted to the load current control of a load current sensor 32.