JPS625654B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in automatic yield control devices for rice milling equipment.

There have been ideas for automatic yield control devices for rice milling equipment in the past, but all of them used a resistance device at the discharge port of the rice milling machine and an intermittent batch-type balance arranged in series between the front and back strokes of the rice milling machine. It was connected to a weighing scale through an electric circuit.

One of the deficiencies of this device is that the load on the rice milling machine, which is responsible for the yield rate, is varied by adjusting the pressure in the milling room. Even if a change in the weight ratio between the weight measuring device for white rice and the weight measuring device for brown rice, that is, the change in yield rate, is signaled to the resistance device of the rice milling machine, the degree of compression of the resistance device, that is, the pressure, will not affect the rice grain layer in the milling chamber. There is a large time difference between the time when the torque reaches the circumferential surface of the milling trochanter, and the load and yield rate are adjusted to the standard values. Since the time difference until the yield rate display value of the weighing device is corrected is added,
It takes quite a while from the first signal to the response,
Not only is sensitive automatic yield rate control impossible, but
Hunting phenomenon occurs when adjusting load and yield rate,
Reliability cannot be expected. Since the weighing scale operates intermittently, the measurement value is displayed as a wave-like pulse that jumps intermittently, making it difficult to measure the yield rate with high precision.If the automatic scale operates frequently, the fulcrum blade of the weighing rod will be damaged for a short period of time. Since wear and tear causes errors in scale values, making automatic control even more impossible, virtually no examples have succeeded in automatic rice milling yield control.

Therefore, the present invention compensates for the error in the flow rate value of the wave-like intermittent weight measuring device by making the weight measuring device a continuous flow rate measuring device, significantly extending the life of the weighing device, and by making it a continuous flow meter for white rice and continuous brown rice. The error in the standard yield rate indicated by the yield measuring device using a calculation circuit with a flowmeter is signaled to the reversible rotary electric motor that can change the speed of the milling trochanter of the rice milling machine closest to the yield measuring device, and the error is immediately detected. The rotational speed of the milling trochanter is changed until the load reaches the standard yield rate, and the yield rate and milling rate are immediately adjusted.The flowing polished rice is soon delivered to the polished rice continuous flowmeter, and a continuous response of a continuous signal is obtained within the shortest possible time. It was developed to perform highly accurate measurement adjustment and maintain a yield rate always on schedule.

In general, the load in the milling room is the multiplicative product of the frictional force between the milling trochanter and the rice grains and the peripheral surface speed of the milling trochanter, and the frictional force is the multiplicative product of the normal stress, immediate resistance pressure, and the friction coefficient. There is an advantage that immediate load adjustment can be done by adjusting the immediate rotational speed of the milling trochanter, whereas in the conventional resistance pressure adjustment, simultaneous load adjustment is possible using the signal from the flow meter. It is absolutely impossible to do so.

The reversible rotary electric motor used in the transmission of the present invention may be used for adjusting a separate speed change transmission or for changing the speed of a variable speed motor.

In addition, the present invention provides a signal from a continuous flow rate measuring device for milled rice to a rotary transmission of a rice milling machine in order to accurately control the load and yield rate, and a response of the adjusted yield rate after shifting as quickly as possible. A reversible rotating electric motor with a transmission is installed in the final stroke rice milling machine of the series-coupled rice milling device.

The electric motor used in the transmission may be a thyristor motor itself, or a pulse motor driven by pulses sent from a yield rate measuring device to the transmission, or a servo motor. In some cases.

To explain the present invention with reference to the drawings, FIG. 1 is a partially cutaway side view of a rice milling apparatus in which different types of milling chambers are connected, and the grinding milling trochanter 2 installed in the porous-walled bran removal milling cylinder 1 is operated at high speed. Next to the rice polishing machine 4, which is equipped with a whitening chamber 3 that rotates, there is a rice polishing machine 8, which is equipped with a whitening chamber 7 that rotates a jet friction polishing trochanter 6 that rotates at a low speed in a porous bran removal tube 5. The milling chambers 3 and 7, each having its own characteristics and isolated from each other, are set up in a continuous series process, and the blast friction milling trochanter 6 is supplied with air by a blower 9.
Grain collection chambers 10 and 1 are located below the bran removal cylinders 1 and 5, respectively.
1 are installed in series, and the rice grain distribution communication between the rice milling machines 4 and 8 is connected to the elevator 13 using the gutter 12.
and the supply tank 14 are connected through a downstream pipe 15, and a flow rate measuring device 18 is interposed between the elevator 16 of the brown rice carrying process A and the supply tank 17 of the rice milling machine 4, and is fixedly installed in the cylindrical part of the elevator 16. Further, a flow rate measuring device 20 is interposed and fixed between the elevator 19 of the polished rice carrying-out process B and the rice polishing machine 8. 21 is rice milling machine 4,
Reference numeral 8 indicates a driving main electric motor, and reference numeral 22 indicates a reversible rotating electric motor used in the transmission of the rice milling machine 8.

Next, the flow rate measuring devices 18, 20 will be explained with reference to FIG. A supply hopper 24 and a discharge hopper 25 are provided at appropriate positions in contact with the upper belt surface of the endless belt 23 for weighing, and a weighing platform 26 is mounted with a spring 27 in contact with the center lower surface of the upper belt surface.
28 is a setting dial for setting the measurement reference value by spring adjustment, and the weight of the object to be weighed and its equilibrium state are adjusted to a constant level by the damper 29 and the gate operation of the differential transformer 30. It is formed like this. 31 is a driving roller, 32
A and 32B are speed detectors of each measuring device 18 and 20, and 33A and 33B are weight detectors, respectively.

Next, the control electric circuit of this device will be explained with reference to FIG. Flow rate measuring device 1 on the A side of the brown rice delivery process
The detection sensor section of the weight detector 33A is connected to one terminal on the input side of the multiplier 34A provided in 8 through the amplifier 35A, and an amplifier 36 is connected to the other terminal on the input side.
The detection sensor part of the speed detector 32A is connected through A, and the detection sensor part of the weight detector is connected through an amplifier 35B to one terminal on the input side of a multiplier 34B provided in the flow rate measuring device 20 on the side of the polished rice delivery process B. In addition to connecting the sensor section, the detection sensor section of the speed detector 32B is connected to the other terminal on the input side via the amplifier 36B, and the output side of each multiplier 34A, 34B is a divider provided in the arithmetic circuit 37 of the next step. 38, and its output side is connected to one input terminal of a comparator 39, and a variable setting device 40 for setting the expected yield value is connected to the other terminal. The output side of the device 39 is connected to each level setting device 43a, 43b, . It is connected to a control circuit 44 of a reversible rotary motor 22 used in the provided transmission, and its 44 output side is connected to the motor 22, and a speed detector 45 of the motor 22 is connected to the control circuit 44.

Because of the above-mentioned configuration, the variable setter 4 provided in the comparator 39 of the calculation circuit 37 sets the expected yield value of polished rice.
0, and when the raw brown rice is put into the supply section of the elevator 16 and the device and the electric circuit are started, the raw brown rice passes through the flow rate measuring device 18 installed in the brown rice carrying process A and is transferred to the grinding rice mill 4. The milled rice is supplied to the milling room 3, is ground and refined in the milling room 3, and sent to the next process, the friction-type rice miller 8.The milled rice is also friction-milled in the milling room 7 and milled to a predetermined yield value. It passes through the flow measuring device 20 provided in the carry-out process B and is carried out of the machine. meanwhile,
Each flow measuring device 18, 20 detects the weight per unit area of the grain conveyed by the belt 23 surface via the weighing table 26 with weight detectors 33A, 33B, and measures the value. The belt speed is detected by speed detectors 32A and 32B and its numerical value is measured, and each measured value is sent to multiplier 3.
4A and 34B to calculate the flow rate (weight value) of brown rice and the flow rate (weight value) of polished rice, respectively.
The yield rate is calculated by dividing by 41 A/D converters 42
Each level setter 43a, 43b, 4 instructs each individual a correction value for speed increase/decrease (+ or -) through
3c, 43d...43x is selected and operated, and the reversible rotary motor 22 rotates forward and backward in accordance with the correction value of this selected setting device to correct its variable speed. As a result, the main electric motor 21 for rice milling rotates at a correct speed, and the friction milling trochanter 6 connected thereto rotates with correct correction, so that the internal frictional resistance of the milling chamber 7 is appropriately revised to achieve the expected yield rate. The milling action is immediately and automatically carried out, which has the effect of accurately, quickly, and automatically mass-producing high-quality milled rice that is always milled to a standard yield rate.

Claim 3 provides that since the rice polishing motor used in the transmission is a pulse motor or a servo motor, even when the electric motor of the transmission is stopped, the load on the transmission remains constant and the corrected rotation speed is maintained. Since the amount is accurately maintained, the expected yield rate can be adjusted more accurately and the elaboration effect is stabilized.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the present invention; FIG. 1 is a partially cutaway side sectional view of the entire device, FIG. 2 is an explanatory diagram of a continuous flow rate measuring device, and FIG. 3 is an electrical diagram for controlling the device. It is a circuit. DESCRIPTION OF SYMBOLS 1... Porous wall rice bran removal polishing cylinder, 2... Grinding polishing trochanter, 3... Polishing room, 4... Rice polishing machine, 5... Porous bran removal polishing cylinder, 6... Blast friction polishing trochanter, 7 ...Whitening room, 8...Rice polishing machine, 9...Blower, 10,11...
...Grain collection room, 12...Gutter, 13...Elevator, 14...
... Supply tank, 15 ... Downflow pipe, 16 ... Elevator, 17 ... Supply tank, 18 ... Flow rate measurement device, 19 ... Elevator, 20 ... Flow rate measurement device, 2
DESCRIPTION OF SYMBOLS 1... Main motor for drive, 22... Reversible rotary motor, 23... Endless belt for weighing, 24... Hopper for supply, 25... Hopper for discharge, 26... Weighing stand, 27... Spring, 28... ...setting dial,
29...damper, 30...differential transformer, 31...
...Driving roller, 32A, 32B... Speed detector, 33A, 33B... Weight detector, 34A, 3
4B... Multiplier, 35A, 35B... Amplifier, 3
6A, 36B...Amplifier, 37...Arithmetic circuit, 3
8...Divider, 39...Comparator, 40...Variable setter, 41...Speed adjustment circuit, 42...A/D converter, 43a, 43b...43x...Level setter, 44... ...Control circuit, 45...Speed detector.

Claims (1)

[Scope of Claims] 1. A brown rice carrying-in process and a polished rice carrying-out process provided before and after a rice milling device consisting of at least one rice milling machine,
A continuous flow rate measuring device for brown rice and a continuous flow rate measuring device for white rice, each equipped with a weight detection section and a speed detection section, are interposed to form a consistent rice grain flow path, and the electricity of the continuous flow rate measuring device provided in each process is 1. An automatic yield control device for a rice milling machine, characterized in that the circuit is connected to a circuit of a reversible rotary motor used in a transmission of the rice milling machine via a yield measuring device comprising an arithmetic circuit and a speed adjustment circuit. 2. The automatic yield control device for a rice milling apparatus according to claim 1, wherein the reversible rotary electric motor used for the transmission of the rice milling machine is provided in the final stroke rice milling machine of the series-coupled rice milling apparatus. 3. The automatic yield control device for a rice milling apparatus according to claim 1 or 2, wherein the rice milling electric motor used in the transmission device is a pulse motor or a servo motor.