JPH0525750Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention uses a dehulling device equipped with a pair of derolling devices, and separates the dehulled material that falls from the dehulling device into grains, rice husks, etc. using wind pressure. In a rice huller equipped with a wind sorting section, the wind pressure of the sorting air flowing through the wind sorting section is controlled to a preset appropriate state in accordance with the amount of deprocessed material to be supplied, resulting in consistently high wind sorting performance. This invention relates to a wind selection control device that can maintain the following conditions.

``Prior art'' Conventionally, in a rice hulling sorter equipped with a dehulling section equipped with a pair of derolling sections and a wind sorting section that separates the deprocessed material falling from the derolling section into rice husks etc. by wind pressure, a sorting wind A technique for detecting the wind pressure in a road and adjusting the wind power of a suction and dust removal machine is known as described in Japanese Utility Model Publication No. 43583/1983.

``Problems that the invention aims to solve'' By the way, in this type of rice hulling machine, the dehulled material that falls from the hulling to the wind sorting section is separated into grains, rice husks, etc. by the sorting wind. is carried out, but
The wind pressure of the sorting air greatly affects the sorting capacity, and the biggest cause of fluctuations in the wind pressure of the sorting air is related to the deprocessing speed.
-As described in Publication No. 43583,
With a system that detects the wind pressure in the sorting air path and adjusts the air force of the suction dust extractor, it is not possible to properly control the amount of waste to be removed, and it is difficult to maintain a high sorting capacity at all times. is difficult.

Therefore, the present invention is an attempt to solve the above problems, and is designed to reduce the amount of processed material, which is the biggest cause of fluctuations in the wind force of the sorting air, by keeping the wind force in the sorting air flow path constant. The purpose of the present invention is to provide a wind selection control device for a rice huller that can improve the accuracy of wind selection control and the response speed of control operations by directly controlling the wind selection control, and can maintain high wind selection performance at all times. That is.

"Means for Solving the Problems" In order to achieve the above object, the present invention is constructed as follows.

In other words, the structure is that the huller is equipped with a dehulling section equipped with a pair of derollers, and a wind sorting section that separates the deprocessed material falling from the dehulling section into grains, rice husks, etc. using wind power. A pressure sensor that detects the wind force of the sorting air is installed in the sorting air flow path of the wind sorting unit equipped with a blower that distributes the air, and the sensing signal from this pressure sensor is input to keep the wind pressure of the sorting air constant. This is a wind selection control device for a rice huller, characterized in that the number of rotations of a pair of rolls is increased or decreased to control the amount of deprocessed material supplied to a wind selection section.

"Operation" According to the device according to the present invention configured as described above, the treated material removed by the removal part falls into the wind sorting part, and at the falling speed, the grain is grained by the wind pressure of the sorting wind. Wind sorting is carried out to separate rice into chaff, etc. The wind pressure of the sorting air flowing through the wind sorting section varies the most depending on the amount of processed material, but the wind pressure in the sorting air flow path is detected by a pressure sensor, and the wind pressure is determined by the sensing signal. The amount of deprocessed material is directly controlled to remain constant.

"Example" Examples will be described with reference to the drawings.

In Fig. 1, 1 is a rice huller, and this rice huller 1 has a removing section 2 at the top and a wind sorting section 3 at the bottom.
It is equipped with the following. The removal section 2 is provided with a pair of removal rolls 4, 4 and a paddy supply hopper 5, and the wind selection section 3 is connected to one side thereof with an exhaust duct 6 that forms a sorting air flow path. A blower 8 is built into the duct 6 on the exhaust port 7 side. This blower 8 sucks air from the wind selection section 3 side and discharges the air. There is an air intake port 9 on the other side of the wind selection section 3.
is opened. A pressure sensor 10 is provided on the base side of the exhaust duct 6 that forms the sorting air flow path to detect the wind pressure (static pressure) of the sorting air flowing therein. The sensing signal of this pressure sensor 10 is input to the automatic control device 11, and the automatic control device 11 increases or decreases the number of rotations of the de-rolls 4, 4 to adjust the pressure of the sorting air flowing in the sorting air flow path. The supply amount of the treated material is controlled so as to be constant.

FIG. 2 shows the circuit configuration of the automatic control device 11. In this figure, 13 is a microprocessor, and the pressure sensor 10 is connected to the input of the microprocessor 13 via an A/D converter 14. A pressure setting device 15 is connected to the input side B of the microprocessor 13 via an A/D converter 16 and is connected to the input side A of the microprocessor 13 . Reference numeral 17 denotes an AC-AC inverter for increasing or decreasing the rotation speed of the drive motor 19 for the derolling 4, 4, and this inverter 17 connects the output side C of the microprocessor 13 to the D/A converter 1.
8, the number of rotations of the drive motor 19 of the derolling parts 4, 4 is increased or decreased to control the amount of de-processed material to be supplied to the wind selection part 3, and the wind selection part 3
The pressure (static pressure) of the sorting air at the pressure setting device 15
It is controlled to maintain a constant state set in advance.

In the structure as described above, the processed material a removed in the removing section 2 falls into the wind sorting section 3, and in the falling process, grains c, rice husks d, etc. are separated by the wind pressure of the sorting wind b. A wind selection is conducted to separate the seeds. The wind pressure of the sorting air b flowing through the wind sorting section 3 varies the most depending on the amount of the processed material a during the hulling operation, but the wind pressure in the sorting air flow path is sensed by the pressure sensor 10, The sensing signal directly controls the supply amount of treated material a to keep the wind pressure constant, improving the accuracy of wind selection control and the response speed of control operations, ensuring high air selection performance at all times. can be maintained.

"Effects of the invention" According to the invention, the amount of de-filtered material, which is the biggest cause of fluctuations in the wind pressure of the sorting air, is directly controlled so as to maintain the wind pressure in the sorting air flow path constant. The accuracy of wind selection control and the response speed of control operations are improved, and the effect of constantly maintaining high sorting ability is obtained.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a schematic longitudinal sectional front view of a huller, and FIG. 2 is a block diagram of an automatic control device. 1... Husking machine, 2... De-hulling section, 3... Wind sorting section,
4, 4... De-rolling, 5... Paddy supply hopper, 6
...Exhaust duct, 7...Exhaust port, 8...Blower,
9... Air intake port, 10... Pressure sensor, 11...
... Automatic control device, 15 ... Pressure setting device, 19 ...
drive motor.

Claims (1)

[Scope of utility model registration request] In a hulling machine equipped with a dehulling section equipped with a pair of derolling sections and a wind sorting section that uses wind pressure to separate the processed material that falls from the dehulling section into grains, rice husks, etc., a blower that distributes sorting air is used. A pressure sensor that detects the wind pressure of the sorting air is provided in the sorting air flow path of the equipped wind sorting unit, and a sensing signal from this pressure sensor is input.
1. A wind selection control device for a rice huller, characterized in that the number of rotations of a pair of derolls is increased or decreased so that the wind pressure of the sorting air is constant, thereby controlling the amount of deprocessed material supplied to a wind selection section.