JP2552277B2 - Sewage control device of rice mill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) [0001] The present invention relates to a polishing control device for a rice polishing machine capable of controlling polishing pressure when polishing brown rice.

(Prior art) Conventionally, in a so-called circulation type rice mill, in order to mill rice at a constant milling pressure, a resistor is provided in a flow path of rice grains pushed out from a transfer chamber to a pressure chamber, and a resistor is provided. The position was controlled to keep the milling pressure constant. And
This control is performed by detecting the load current of the main motor that drives the Seisei roll and moving the resistor so that the load current falls within a certain range.

(Problems to be solved by the invention) In the case of the above-mentioned conventional technique, since the polishing is performed for a certain period of time at a predetermined polishing pressure irrespective of the temperature of the rice grain, variations in whiteness due to the temperature difference of the rice grain before the start of rice polishing Was occurring.
This was because if the temperature of the rice grains was low, it would be difficult to polish the rice, and if the rice grain temperature was not adjusted, the rice would be insufficiently refined.

This invention was made in view of the problems of the above-mentioned conventional techniques, and a polishing control device of a rice polishing machine that can always obtain optimum rice polishing with a constant temperature even when the temperature of rice grains before starting rice polishing is different. The purpose is to provide.

[Structure of Invention]

(Means for Solving Problems) The present invention relates to a rice polishing control device of a rice polishing machine for controlling a resistor so that the rice polishing pressure falls within a certain range, and the temperature or temperature of rice grains before starting rice polishing in the rice polishing machine. A temperature sensor for detecting the temperature is provided, and a correction means for correcting at least one of the setting value and the setting time of the polishing load by the output of the temperature sensor is provided, and the setting value and the setting of the loading load corrected by the correction means are provided. It is a polishing control device for a rice polishing machine, which is provided with a resistor drive device control means for controlling a resistor drive device and a main motor according to time and a main motor control means.

(Operation) The rice polishing control device of the rice polishing machine of the present invention detects the temperature or temperature of the rice grains before the rice polishing is started by the temperature sensor, corrects at least one of the setting value and the setting time of the rice polishing load, and adjusts the temperature. It is intended to eliminate variations in milling degree due to differences.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

The rice mill of this embodiment is a so-called circulation type rice mill, and as shown in FIG. 3, a transfer chamber 2 is provided at an upper portion of a rice mill main body 1, and a rice mill which presses and transfers rice grains into the transfer chamber 2. The roll 3 is rotatably mounted. The milling roll 3 is coaxially connected to a pulley 5 via a shaft 4. The pulley 5 is connected to a pulley 7 of a main motor 6 and a belt 8.
Are connected via

Below the transfer chamber 2, a bran-removing net 9 is attached, and at both ends of the transfer chamber 2, pressure chambers 10, where milling pressure is applied to rice grains,
And a supply port 11 for rice grains. This pressure chamber 10,
A hopper 12 that stores rice grains is fixed above the supply port 11, and a temperature sensor 38 such as a thermistor that detects the temperature of rice grains is attached to the inner peripheral surface of the hopper 12. Further, the pressure chamber 10 is rotatably mounted with a resistor 13 which gives resistance when the rice grains are refluxed and applies a polishing pressure to the rice grains by the pressing force of the rice polishing roll 3. As shown in FIG. 4, the resistor 13 is rotatably provided integrally with a shaft 14 provided perpendicularly to the flow direction of rice grains.
The shaft 14 has one end bent and engages with the sliding member 15. The sliding member 15 is screwed with a spiral shaft 17 rotated by a sub motor 16 which is a resistor driving device,
Of the sliding member 15 moves in the axial direction of the spiral shaft 17,
The resistor 14 is rotated by rotating the shaft 14. Further, before and after the moving range of the sliding member 15, limit switches 18 and 19 are provided to detect a position where the resistor 13 retreats and does not give resistance to the rice grain and a position where the resistance becomes maximum. There is.

In the electric circuit of the rice milling machine of this embodiment, as shown in FIG. 1, a main motor 6 is connected to an AC 100V power source of a commercial power source via a power switch 20, and further, between the main motor 6 and the power source. A main motor drive relay 22 and a current transformer (CT) 23 that detects the load current value of the main motor 6 are connected in series. The output of the current transformer 23 is converted into a digital value by the A / D converter 25 via the amplifier 24 and input to the input port 27 of the microcomputer 26. A load setting for selectively inputting one of the set values serving as a reference for controlling the load current value of the main motor 6, for example, one of the three kinds of load set values shown in FIG. 6, to the input port 27. The input means 28, a rice polishing switch 29 for instructing to start driving the main motor 6, and a limit switch 18 for detecting a retracted position of the resistor 13 (hereinafter abbreviated as 0 position) are connected. Furthermore, a temperature sensor 38 for detecting the temperature of rice grains before the start of rice polishing is connected to the input port 27 via the A / D converter 39.

The microcomputer 26 has a CPU 30, a ROM 31, and a RAM 32, the output of which is connected to the sub motor drive circuit 34, the LED display 35, and the main motor drive relay 22 via the output port 33, each of which is instructed by the CPU 30. Operate. This microcomputer 26, sub motor drive circuit
The main motor drive relay 22 is connected to the power supply circuit 36 and receives power.

The milling control of the rice mill according to this embodiment is digitally processed by the microcomputer 26, and the processing program is stored in the ROM 31 or an external memory (not shown).

As shown in the flowchart of FIG. 2 and the solid line graph of FIG.
When 20 is closed, the sub motor 16 is rotated in the reverse direction and the resistor 13 is returned to the 0 position which does not give resistance to the rice grain. This movement is the spiral axis
17 rotates, the sliding member 15 moves to the left in FIG. 4,
This is done by rotating the shaft 14 clockwise to rotate the resistor 13 in a direction parallel to the rice grain flow path. Further, when the resistor 13 reaches the 0 position, the sliding member 15 turns on the limit switch 18, and in conjunction with this, the sub motor 16 is stopped. After that, when the desired setting value of the lumbering pressure is input from the load setting input means 28 according to the type of brown rice, the output of the temperature sensor 38 is read, and the setting value and the setting time of the lumbering load initially set, Correction is made according to the output value of the temperature sensor 38. Here, for example, if the rice grain temperature is 5 ° C, 25
Compared with those of 5 ℃, 5 ℃ is about 10 ~ 20 than 25 ℃.
It has been experimentally found that it is impossible to perform the same quality rice polishing unless the rice is refined under a high load of about%. Therefore, the correction amount α for the load setting value and the correction amount β for the setting time
Is based on 15 ℃, plus and minus 5 to 10 for temperature difference 10 ℃ both for setting value and setting time
You can correct the percentage. Then, turn on the rice polishing switch 29
Then, the main motor 6 is driven and the starch roll 3 rotates. Further, at the same time, counting of the constant set time t ₁ and the temperature-corrected set time T is started, and the LED display 35 displays the elapsed time of t ₁ , T. The set polishing time is a time necessary and sufficient for polishing white rice.

Then, when the rice polishing initial time t ₁ has elapsed, the correction by the output of the temperature sensor is not performed, and the control of the lumbering pressure is started. The rice initial time t ₁ is started to rotate pearling rolls 3, a sufficient rising period to become circulation rice grains is performed uniformly and stably. The control of pressure is
Current transformer connected in series to the power supply line of the main motor 6
The output of 23 is amplified by the amplifier 24, further A / D converted, and input to the microcomputer 26. The CPU 30 compares the load current value of the main motor 6 with the set value. After the initial rice polishing time t ₁ , the CPU 30 of the microcomputer 26 compares the load current value of the main motor 6 from the current transformer 23 with the temperature-corrected load setting value corresponding to the roasting pressure, and the load current value. Is larger than the set value, the sub motor 16 is rotated in the reverse direction to rotate the resistor 13 in the direction of the 0 position for withdrawing from the rice grain flow path, and when the load current value and the set value are equal, the resistor 13 is directly positioned. When the load current value is smaller than the set value, on the contrary, the sub motor 16 is rotated in the normal direction and the resistor 13 is rotated in the direction in which the rice grain flow path is blocked. In this way, the polishing pressure of the rice grain is controlled so as to be within a certain set range, and the polishing operation is terminated when this polishing has passed T time since the main motor 6 was turned on, and the process proceeds to the bran removal.

When the time T for polishing has passed, the bran removal time T ₂ is set, and the bran removal time starts. During the bran removal, since the main motor 6 is rotated with a small load to remove the bran, first, the sub motor 16 reversely rotates and the resistor 13 returns to the 0 position. When the predetermined bran removal is completed, the main motor 6 stops.

Also, in this milling control, all operations are stopped by turning off the power switch 20, and when the power switch 20 is turned on again,
In conjunction with this, the sub motor 16 always reverses, the resistor 13 is returned to the 0 position and reset. And the resistor 13 is 0
Until returning to the position, the main motor 6 does not rotate even if various operation switches such as the rice polishing switch 29 are pressed. Therefore, when stopping all milling operations, turn off the power switch 20.
When performing the fertilization again by performing F, the ferrous substance is always started at the 0 position of the resistor 13.

Further, the power switch 20 is turned on, and a monitor lamp (not shown) is lit to display the operating condition until the sub-motor 16 starts to rotate in the reverse direction until the pressure level becomes zero.

According to the polishing control device of the rice polishing machine of this embodiment, even when the temperature of the rice grains varies depending on the polishing time and the season, the setting value and setting time of the polishing load are automatically corrected to the optimum ones. Since it is carried out, there is no variation in the quality of milled rice, and high quality milled rice can always be provided.

In addition to the thermistor, the temperature sensor of the present invention may be any one that can detect a temperature change, and its mounting position is also a position other than the inside of the hopper as long as it is a position that can detect the temperature or temperature of rice grains before the start of rice polishing. It may be a part.

In addition, the resistor drive device control means of the present invention, in addition to the microcomputer, which has a logic circuit assembled,
It may be controlled in an analog manner.

Further, the correction of the setting value and the setting time of the polishing load may be the correction of only one of them.

〔The invention's effect〕

The polishing control device of the rice polishing machine of the present invention is provided with a temperature sensor for detecting the temperature of rice grains before the start of polishing, and the output of this temperature sensor corrects at least one of the setting value and the setting time of the polishing load to control the polishing. Therefore, there is no difference in the degree of whitening depending on the time of polishing and the season of polishing, and the polishing can always be performed in the best condition. Therefore, it is possible to provide high quality rice with a certain quality.

[Brief description of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention, FIG. 2 is a flow chart showing the operation of this embodiment, FIG. 3 is a longitudinal sectional view of a rice milling machine of this embodiment, and FIG. 4 is this embodiment. FIG. 5 is a perspective view showing the resistor of FIG. 5, FIG. 5 is a graph showing the relationship between the ablation pressure and the ablation time, and FIG. 1 ... Body polishing machine main body, 3 ... Hosei roll, 6 ... Main motor, 13 ... Resistor, 16 ... Sub motor (resistor drive device), 26 ... Microcomputer, 38 ... Temperature sensor

Claims (1)

(57) [Claims] 1. A resistor for moving a resistor in a pressure chamber by detecting a load current of a main motor for driving a starch roll by a detector and comparing the current value with a preset value by a comparing means. In the polishing control device of the rice polishing machine that controls the driving device to control the polishing pressure within a certain range, a temperature sensor that detects the temperature of the rice grain or the temperature before the start of rice polishing and the output of this temperature sensor Compensating means for compensating at least one of the set value of load and the setting time, and controlling the resistor drive device by the compensated setting value of the grinding load when the setting value of the grinding load is corrected by this correcting means. And a main motor control means for controlling the main motor with the corrected set time when the set time is corrected by the correcting means. Pearling controller of rice mill, characterized by Bei.