JPH0468987B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides moisture supply to a humidifying rice milling machine that adds moisture to polished rice just before standard whiteness or ordinary polished rice supplied to a milling room and processes it into ultra-shiny white rice. This invention relates to a method and device for automatically controlling the amount.

Prior art: An automatic water flow rate adjustment device is installed in the water supply pipe of a humidifier that leads to a milling room, which has a milling trochanter mounted on a shaft in a porous-wall draft-removal bran milling cylinder, and a variable resistor and a variable resistor of the automatic regulation device are installed. The water flow rate is automatically adjusted in accordance with the voltage difference between the two variable resistors by communicating with a variable resistor of a rice grain flow balance stabilizing automatic adjustment device provided in the rice grain supply process to the milling room through a comparison amplifier circuit. An automatic flow rate control device for a humidifying rice milling machine that opens and closes a flow rate control valve of the device is known as Japanese Patent Application Laid-open No. 127158/1983.

Problems to be Solved by the Invention The characteristics of the humidifying rice milling machine are that it adds an appropriate amount of moisture to the polished rice supplied to the milling room, moisturizes and softens the extremely thin grain surface of the polished rice, and improves the polishing trochanter and porous wall ventilation. Each time a thin layer of the polished rice grain surface is peeled off using a rice bran removal cylinder, the generated sugar and moisture are removed through the porous wall by ventilation to the outside of the polishing chamber, and the polishing action of the polished rice grains exposes the hard surface. This process produces a beautiful ultra-shiny surface on the polished rice grain surface, but the amount of water added requires extremely precise precision; if the amount of water is insufficient, the aleurone layer stuck to the longitudinal grooves of the polished rice grain is removed. It is extremely difficult to do so, and when the moisture content is excessive, the moisture penetrates into the rice grain into a thick layer, and if this penetration layer exceeds the appropriate thickness limit even by a very small amount, it immediately causes severe cracks in the surface of the rice grain. Furthermore, if the amount of water is excessive, the load in the milling room will increase rapidly, inducing overload of the electric motor, and the milled rice will be crushed and solidified in the milling room, leading to an operation stoppage accident. .

By the way, in the above-mentioned conventional device, the opening degree of the supply port of the rice milling machine is automatically controlled according to the change in the amount of rice grains stored in the tank, and the opening degree of the water supply pipe of the humidifying device is automatically adjusted based on the control value. , which automatically adjusts the amount of rice grains and the amount of water in a correlated manner, but the appropriate amount of water supply varies depending on the degree of polishing, moisture content, temperature, etc. of the rice grains supplied to the milling room. The equipment was unable to automatically adjust the moisture content to the optimum level for the various conditions of the rice grains supplied to the milling room, and was unable to reliably process high-level, ultra-glossy white rice.

In order to solve the above-mentioned problems, the present invention provides a method and apparatus for automatically controlling the amount of water supplied to optimize the processing of ultra-shiny polished rice without being restricted by the various conditions of rice grains supplied to a milling room. This is a technical issue.

Means for Solving the Problems The method for automatically controlling the amount of water supplied to a humidifying rice milling machine, which is the first invention of this application, is based on a method for automatically controlling the amount of water supplied to a humidifying rice milling machine. Rice grains are supplied into the room, water is added to the flowing rice grains, the minimum load value of the motor that changes depending on the amount of water supplied is detected, and the load is set to be higher by an arbitrary value than the minimum load value. It is characterized by automatically controlling the amount of water supplied to increase or decrease.

In addition, the second invention of this application, an automatic moisture supply amount control device for a humidifying rice milling machine, is capable of controlling the amount of moisture supplied to a polishing chamber formed by mounting a polishing trochanter on a shaft inside a porous-walled rice polishing cylinder for removing rice bran. In a humidifying rice milling machine that communicates with a moisture supply device equipped with a regulator, the amount of moisture added to the rice grains can be increased or decreased by an arbitrary value depending on the load of the electric motor that rotates the polishing trochanter. A control device is provided in which a setting device for setting a high load and a storage device are connected to an arithmetic circuit, and a load detector for detecting the load of the electric motor is connected to the water supply amount regulator via the control device. This is an automatic moisture supply amount control device for a humidifying rice milling machine.

Function In a humidifying rice milling machine, when white rice just before standard whiteness or normal white rice is supplied to the whitening chamber, water is added to the white rice flowing in the whitening chamber, and the amount of water to be added is gradually increased. While the grain surface gloss of polished rice flowing out of the milling room gradually improves, the load on the motor gradually decreases in inverse proportion to the increase in water supply, and from the time when the motor load reaches its lowest value, the load on the motor gradually decreases. If the amount of water supplied continues to increase, the load on the motor will rapidly increase from the lowest point. At a moisture supply rate that is slightly higher than the base point where the motor load is the lowest value, the polished rice flowing out of the milling room can be processed to the highest gloss level, and if this optimum moisture supply rate is exceeded, the gloss level will decrease. As it decreases, the softening of the polished rice becomes excessive, and the flow friction resistance of the rice grains increases rapidly, making the load on the electric motor unstable.

Based on the above example, the present invention gradually increases the amount of water added to the rice grains supplied to the milling room, detects the base point where the motor load is the lowest value,
By automatically controlling the moisture supply amount regulator of the moisture supply device so that the load is higher than the load at the base point by an arbitrarily determined value, ultra-shiny rice grains can be produced without being affected by the conditions of the supplied rice grains. It can automatically adjust the moisture supply to the optimum amount for processing polished rice.

Embodiment An embodiment of the present invention will be described based on FIGS. 1 and 2. Inside the machine frame 1 is a polishing cylinder 2 for removing bran with a porous wall.
A whitening chamber 6 is formed by horizontally hanging a whitening tube 2 and a whitening trochanter 4 with a spiral trochanter 3 connected to the main shaft tube 5. The supply port 7 communicating with the whitening room 6 is equipped with a rice grain detector 8 for detecting the presence or absence of rice grains, and an opening/closing device 9 consisting of an on-off valve and an operating mechanism for opening or closing the supply port 7. A supply hopper 10 is connected to the upper part of the supply port 7.

A large number of humidifying holes 11 bored in the main shaft pipe 5 communicate with the humidifying grooves 12 of the milled trochanter 4, and a two-fluid ultrasonic nozzle 14 is provided at one end 13 of the main shaft pipe 5 to generate ultrasonic waves. The water supply pipe 15 side of the nozzle 14 is connected to a water tank 17 via an electromagnetic pump 16 having a water supply amount regulator, and the air supply pipe 18 side is connected to an air compressor 19. , the water supply device 20 is formed by the air supply pipe stroke.

A shielding board 21 is inserted into the main shaft pipe 5 at approximately the middle part to divide the main shaft pipe 5 into a moisture supply pipe 22 and an air suction pipe 23. A humidified whitening room 2 whose part is connected to a moisture supply device 20
4, and the latter half of the process from the intermediate stage of the whitening chamber 6 to the rice discharging section 26 forms a humidifying whitening process as a ventilation whitening chamber 25. The terminal part of the bran collecting gutter 28 which communicates with the ventilation slot 12 of the child 4 and the porous-walled rice bran polishing tube 2 and which surrounds the polishing chamber 6 is connected to the suction side of the exhaust fan 29, Exhaust fan 29
The rice bran is sucked into the rice bran and discharged to a bran collection device (not shown) such as a cyclone provided outside the machine.
The rice discharging section 26 is equipped with a load adjusting device 30 that adjusts the degree of pressure of grain-by-grain friction between the rice grains in the whitening chamber 6.

The electric motor 31 is connected via a drive belt 32 so as to rotate a main shaft tube 5 on which the spiral rotor 3 and the polished rotor 4 are mounted. 33 is supply hopper 1
This is a rice grain flow rate measurement device installed in the feed hopper 10, and is formed by connecting a flow rate detection plate 34A installed in the supply hopper 10 in relation to a detector 34B. 35 is a raw rice temperature sensor, and 36 is a finished rice temperature sensor provided in the rice discharging section. The rice grain detector 8, the opening/closing device 9 for the supply port 7, the rice grain flow rate measuring device 33, the raw rice temperature sensor 35, and the finished rice temperature sensor 3
6 and a lead wire 38 connected to a terminal block of an electromagnetic switch 37 that controls the operation of the electric motor 31 is connected to a control device 39. The control device 39 includes, in addition to an operation start push button 40 and an operation stop push button 41 for starting and stopping the electric motor 31, a raw rice temperature indicator 42, a finished rice temperature indicator 43, a rice grain flow rate indicator 44, Moisture supply amount indicator 45, load indicator 46, push button 47 for automatic operation, push button 4 for manual operation
8. A high load setting value correction button 49, a low load setting value correction button 50, a load correction value display 51, etc. are provided. Note that other devices such as a nebulizer may be used as the moisture supply device.

Next, the configuration of the control device 39 will be explained based on FIG. 3. An electromagnetic switch 37 is interposed in the circuit connecting the power terminals R, S, and T and the electric motor 31, and
Between the terminals R and S are the electromagnetic coil MC of the electromagnetic switch 37, the push button 40 for starting operation, and the push button 4 for stopping operation.
1 are connected in series, a load detector 52 is interposed in relation to the circuit of the terminal T, a load indicator 46 is connected to the load detector 52, and its output side is connected to a particle size regulator 53, A. It is connected to an arithmetic circuit 55 via a /D converter 54. A memory circuit 56 and a load setting device 57 are connected to the arithmetic circuit 55, and the output side of the arithmetic circuit 55 is connected via a drive circuit 58 to an electromagnetic pump 16 having a water supply amount regulator. . In addition, a raw rice temperature indicator 42 is connected to the raw rice temperature sensor 35, and its output side is connected to an arithmetic circuit 55 via an A/D converter 59, and the rice grain flow rate measuring device 33 has a rice grain flow rate display. The output side thereof is connected to an arithmetic circuit 55 via an A/D converter 60. The rice grain detector 8 is connected to an arithmetic circuit 55 via an A/D converter 61, and a switching device 9 is connected to the output side of the arithmetic circuit 55 via a drive circuit.

Next, the operation of the above configuration will be explained with reference to FIGS. 1 to 3. The electric motor 31 is started to supply the supply hopper 10 with white rice just before standard whiteness or ordinary white rice, the opening/closing device 9 is activated to open the supply port 7, and the rice grains supplied to the humidifying whitening chamber 24 are connected to the humidifying tube. 22, moisture supply hole 11, moisture supply groove hole 1 of refined trochanter 4
Supplying moisture from the moisture supply device 20 via 2,
The surface of polished rice grains is moistened and softened, and the polished rice grains are immediately polished.
The thin layer of polished rice is peeled off by the stirring action of the polishing trochanter 4, and the moisture along with the peeled rice bran is sucked from the porous wall rice bran removal milling chamber 2 to the exhaust fan 29 and removed. The heated and moistened polished rice, which has been peeled and pre-treated to make the surface of the polished rice grain smooth, is sent to the ventilation polishing room 25 by the transport action of the spiral trochanter 3.
The polishing action of the milling trochanter 4 and the drying action of ventilating the polished rice layer through the suction pipe 23, the air suction path 24, and the ventilation slot 12 of the milling trochanter 4 with the air sucked by the exhaust fan 29 make the polished rice grain surface smooth and shiny. The rice is processed into rice and discharged from the rice discharging section 26 to the outside of the machine.

Next, the state of automatic moisture supply amount control according to the present invention during the above-mentioned humidification process will be explained with reference to FIGS. 3 and 4. When the amount of water supplied from the water supply device 20 is gradually increased, the electric motor 3
The load at point 1 gradually decreases, and the load increases rapidly from point A, which is the lowest load value. A load detector 52 detects the load on the motor 31, which changes as the amount of water supplied increases.
The detected value is detected by the rectifier 53, A/
The load value is communicated to the arithmetic circuit 55 via the D converter 54, and also to the storage circuit 56. The signal from the setting device 57, which has a set value (point B) that increases the load by an arbitrary value with respect to the lowest load value (point A) input to the memory circuit 56, and the detection signal from the load detector 52 are the same. The electromagnetic pump 16 is controlled by the output signal of the arithmetic circuit 55 until the signal value is reached, and the amount of water supplied is gradually increased. When the signals from the setting device 57 and the load detector 52 become the same, the rice can be processed into the most glossy white rice. At this point, the control of the water supply amount adjustment of the electromagnetic pump 16 is stopped, and the optimum amount of water is constantly and continuously supplied to the rice grains flowing in the humidifying whitening chamber 24.

During the above operation, the load detection value of the load detector 52 may vary. The load fluctuations are mainly due to changes in the raw rice supply flow rate, changes in the polishing degree of the raw rice, changes in the raw rice temperature, changes in the control of the load adjustment device 30, etc., and changes in the load detection value of the load detector 52. When this occurs, the electromagnetic pump 16 is controlled by a signal from the arithmetic circuit 55 to gradually reduce the water supply amount, and the fluctuating load value is input to the storage circuit 56, and the lowest load value is detected. At this time, if the minimum load value fluctuates to point C, the electromagnetic pump 16 continues until the load value reaches the same load value as the signal from the setting device 57, starting from point C and reaches point D, where the load increases by an arbitrary value. Gradually increase the amount of water supplied from In addition, the rice temperature detection value of the raw rice temperature sasen-35 is the A/D
The signal from the setting device 57 is corrected by the calculation circuit 55 using a correction value that is input to the calculation circuit 55 via the converter 59 and is input in advance to the storage circuit 56 to correct the load setting value for each difference in rice temperature. At the same time, the electromagnetic pump 16 is controlled by the output signal of the arithmetic circuit 55. Similarly, a correction value for correcting the load setting value depending on the difference in the supply flow rate of raw rice is input into the memory circuit 56 in advance, and the detection signal of the rice grain flow rate measuring device 33 is inputted via the A/D converter 60. The arithmetic circuit 55 is contacted, and upon receiving the load setting correction value of the memory circuit 56 in response to the detection signal, the arithmetic circuit 55 controls the water supply amount of the electromagnetic pump 16, and automatically adjusts the water supply amount to the optimum amount for processing ultra-shiny polished rice. It is something that is controlled.

Further, when the rice grain detector 8 detects that the supply of rice grains has run out, the detection signal is communicated to the arithmetic circuit 55 via the A/D converter 61, and the output signal from the arithmetic circuit 55 causes the electromagnetic pump 16 to be activated. At the same time as stopping the operation, the opening/closing device 9 is operated to close the supply port 7. The rice grain detector 8 then operates the switching device 9 and the electromagnetic pump via the arithmetic circuit 55 in response to a signal that detects the supply of rice grains.
The rice grains are supplied to the whitening room 6, and moisture is supplied to the rice grains to continue processing the ultra-shiny white rice.

Regarding the relationship between water supply amount and current value, please refer to the fourth section.
Although the explanation was made with reference to the figures, the one shown in Figure 4 shows an experimental example for a specific rice grain supply flow rate, and the current value or water supply amount and the minimum load depend on the capacity of the humidifying rice milling machine. Values A and C points and set values B and point D naturally vary.

Effects of the Invention As explained above, according to the method for automatically controlling the water supply amount of the present invention, the water supply amount is controlled to increase the load by an arbitrary value from the lowest load value. Even if the conditions of the supplied rice grains change, the amount of water supplied is automatically adjusted to the optimum level for processing ultra-shiny white rice, and has the remarkable effect of reliably processing ultra-shiny white rice.

In addition, according to the automatic moisture supply amount control device of the present invention, the moisture supply device is automatically controlled by communicating the detection signal of the load detector and the output signal of the arithmetic circuit, and the moisture supply amount is adjusted to the level during super glossy polished rice processing. This system automatically adjusts the amount of moisture supplied to the optimum level, and has the remarkable effect of reliably processing ultra-shiny white rice without being affected by the conditions of the rice grains supplied.

[Brief explanation of drawings]

Fig. 1 is a side sectional view showing an embodiment of the present invention, Fig. 2 is a front view showing the main parts thereof, Fig. 3 is a configuration diagram of the control device, and Fig. 4 is an explanation showing the operation of the present invention. It is a diagram. 1... Machine frame, 2... Refining tube for porous wall bran removal, 3... Spiral trochanter, 4... Refining trochanter, 5... Main shaft pipe, 6... Refining chamber,
7... Supply port, 8... Rice grain detector, 9... Switching device, 1
0...Supply hopper, 11...Moisturizing hole, 12...Moisturizing slot, 13...One side terminal, 14...Two-fluid ultrasonic nozzle, 15...Water supply pipe, 16...Electromagnetic pump, 17...Water tank, 18...Air supply pipe , 19...Air compressor, 20...Moisture supply device, 21...Block panel, 22...Moisturizing pipe, 23
... Air suction pipe, 24 ... Humidification whitening room, 25 ... Ventilation whitening room, 26 ... Rice removal section, 27 ... Air intake hole, 28 ... Bran collecting gutter, 29 ... Air exhaust fan, 30 ... Load adjustment device, 31 ...
Electric motor, 32... Drive belt, 33... Rice grain flow rate measuring device, 34A... Flow rate detection plate, 34B... Detector,
35... Raw rice temperature sensor, 36... Finished rice temperature sensor, 37... Electromagnetic switch, 38... Lead wire, 3
9...Control device, 40...Push button for starting operation, 41...Push button for stopping operation, 42...Raw material rice temperature indicator, 43...
Finished rice temperature indicator, 44...Rice grain flow rate indicator, 45
...Moisture supply amount indicator, 46...Load indicator, 47...
Push button for automatic operation, 48...Push button for manual operation, 49...
High load setting value correction button, 50... Low load setting value correction button, 51... Load correction value display, 52... Load detector, 53... Rectifier, 54... A/D converter,
55...Arithmetic circuit, 56...Memory circuit, 57...Load setter, 58...Drive circuit, 59...A/D converter, 60...A/D converter, 61...A/D converter, 62...Drive circuit, A...Minimum load value,
B...Set value, C...Minimum load value, D...Set value.

Claims (1)

[Scope of Claims] 1. An electric motor that increases or decreases depending on the amount of water added to flowing rice grains in a milling chamber formed by shaft-mounting a milling trochanter inside a porous-walled milling cylinder for removing rice bran. A method for automatically controlling the amount of water supplied to a humidifying rice mill, comprising: detecting a minimum load value, and automatically adjusting the amount of water supplied to increase or decrease so that the load is increased by an arbitrary value with respect to the minimum load value. 2. The automatic moisture supply amount control method for a humidifying rice milling machine according to claim 1, wherein the arbitrary value is corrected and changed depending on the rice grain supply flow rate and temperature conditions. 3. In a humidifying rice milling machine in which a moisture supply device equipped with a moisture supply amount regulator is connected to a polishing chamber formed by suspending a polishing trochanter inside a porous-walled rice polishing cylinder for removing rice bran,
A setting device for setting a high load by an arbitrary value and a storage device are included in an arithmetic circuit so as to increase or decrease the amount of water added to the rice grains depending on the load level of the electric motor that rotationally drives the milling trochanter. An automatic moisture supply amount control device for a humidifying rice milling machine, characterized in that a connected control device is provided, and a load detector for detecting the load of the electric motor and the moisture supply amount regulator are connected through the control device. . 4. A rice grain flow rate measuring device for measuring the rice grain flow rate is provided in the front stage of the whitening room, and the rice grain flow rate measuring device is connected to the arithmetic circuit so as to correct the load setting value based on the measured value of the rice grain flow rate measuring device. An automatic water supply amount control device for a humidifying rice milling machine according to claim 3 of the appended claims. 5. Claim 3 or 5, wherein a raw rice temperature detection sensor provided in a preceding stage of the whitening room is connected to the arithmetic circuit so that the load setting value is corrected according to the temperature of the rice grains supplied to the whitening room. The automatic moisture supply amount control device for the humidifying rice milling machine according to item 4.