JPH0472584B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement of a bran extracting device for a rice milling machine.

Generally, in rice milling machines, a cyclone based on the centrifugal force effect is used as a bran removal device. As a result, the bran powder accumulates or accumulates, and a large amount of bran powder is discharged together with the purified air that circulates inside the cylinder from the exhaust pipe at the top of the cyclone, reverses upwards, and blows out, and the bran-laden wind scatters around the work area. This often deteriorates the environment and reduces milling efficiency due to a decrease in bran removal power.To deal with this, it is necessary to check and remove the accumulated amount of bran powder as appropriate. This is a condition that requires a great deal of time and effort and obstructs the smooth execution of whitening work.

In view of the above-mentioned points, the present invention has been proposed by connecting a rice bran collecting tank equipped with a rotary impeller device for scraping out rice flour with a unique structure to the rice bran discharge port at the bottom of the cyclone, thereby reducing the amount of rice bran powder accumulated in the rice bran collecting tank. The amount is appropriately regulated and an appropriate gap is provided between the cyclone and the bran discharge port to prevent the closure due to accumulation of bran powder, and the accumulated bran powder is timely and automatically taken out from the bran collection tank. By doing so, near the bran discharge port at the bottom of the cyclone, the purified air that reverses upwards inside the cylinder and the bran powder flowing down the cylinder surface are separated, thereby completely eliminating the accidents caused by the discharge of bran-containing wind mentioned above. We aim to develop and provide a high-performance bran removal device for a rice milling machine that can prevent this problem, achieve complete automation of the removal work of rice bran powder in the tank, and ensure that high-efficiency polishing and bran removal is always carried out. It is something.

The present invention will be explained with reference to embodiment figures. Reference numeral 1 denotes a rice polishing machine, and the rice polishing machine 1 has a box-shaped machine frame 3 whose upper part is formed into a supply hopper 2, and a perforated-walled bran removal and polishing cylinder 4 is horizontally suspended in the center of the inside of the box-shaped machine frame 3 whose upper part is formed into a supply hopper 2, and inside the polishing cylinder 4, A rotating main shaft 7 on which a milling trochanter 5 and a grain feeding spiral trochanter 6 are mounted is fitted, and the space therein is used as a milling room 8, and the milling room 8 includes:
A discharge port 10 with a compression lid 9 is provided on one side thereof, and a supply port 11 communicating with the supply hopper 2 is provided on the other end thereof, and between the polishing tube 4 and an outer circumferential wall 12 surrounding the outer periphery of the polishing tube 4 with a space therebetween. A rice bran removal chamber 13 is formed in the rice bran removal chamber 13, and a blower 14 is connected to the rice bran removal chamber 13 to supply a rice bran-containing air mixed with rice bran powder generated by the polishing action to three sides of the machine frame outside the supply hopper 2. Air is supplied to the cyclone 15 by means of a blow pipe 16.

Next, the cyclone 15 has a conical cylindrical body 19A, which has an exhaust pipe 17 on its upper wall and an air supply pipe 18 on its side circumferential wall, and has a bran discharge port 20 at its lower end. 19B, a bran collecting tank 21 is connected to the bran discharge port 20, a bran extracting port 22 is provided at the bottom of the bran collecting tank 21, and a scraping rotation for scraping out bran powder is provided at the top of the bran collecting tank 21. A blade wheel 23 is provided, and a detection sensor 24 for detecting an arbitrary predetermined amount of bran is provided on the inner wall of the rice bran collection tank 21, and the blade wheel 23 is rotated by the detection signal to take out the bran powder outside the machine. 25 is a deceleration motor for rotating the impeller 23, 26 is an on-off valve attached to one blade of the impeller 23 for opening and closing the bran outlet, and 27 is detachably connected to the bran outlet 22. The rice bran filling bag and the impeller 23 are rotated and stopped for an arbitrary predetermined period of time according to a detection signal from the detection sensor 24, and are also rotated by a separately provided timer (not shown).
Stop detection sensor (not shown) that stops rotation based on a signal and detects the lower limit amount of bran powder
is provided on the side wall of the bran collecting tank 21, and the rotation is stopped in response to the detection signal.

Incidentally, if the bran extraction port 20 of the cyclone 15 is expanded as much as possible and connected to the bran collecting tank 21, the above effect will be further improved.

With the above-described configuration, when raw brown rice is put into the supply hopper 2 and the rice bran filling bag 27 is attached to the rice bran discharge port 20 of the rice bran collection tank 21 at the lower part of the cyclone 15 and the device is started, the supply hopper The brown rice in 2 is put into the milling chamber 8 and polished by the rotation of the milling trochanter 5, and the generated bran powder passes through the bran removal chamber 13 - the exhaust fan 14 - the blower pipe 16 - the blower pipe 18 and sent into the cyclone 15. In the cyclone 15, while the bran-containing air mixed with bran powder rotates and flows down the inner peripheral surface of the conical cylinder 19B from the cylindrical body 19A, the speed of the airflow changes to increase the settling speed of the bran powder. At the same time, the rice bran that reversely rises from the vicinity of the bran discharge port 20 and enters is completely separated and discharged from the upper exhaust pipe 17, and the separated bran powder is discharged from the bran discharge port 2 at the lower end.
It is discharged from 0, flows down into the bran collecting tank 21 at the bottom, and is accumulated. When the bran powder accumulates and reaches the set position of the detection sensor 24, the motor 25 is rotated by the detection signal, rotates the scraping rotary impeller 23, and removes the bran powder from the bran extraction port 22. It is discharged and stored in the rice bran filling bag 27. The bag body 27 has a bran extraction port 2
2 and is transported, and the next bag body 27
will be newly installed in the bran extraction port 22.

As described above, the bran extracting device of the rice milling machine of the present invention appropriately regulates the amount of bran powder accumulated in the bran collecting tank and provides an appropriate gap between the bran discharge port of the cyclone and prevents the accumulation of bran powder. In addition to preventing the rice bran from closing, the rice bran powder is timely and automatically taken out of the rice bran collecting tank.
Near the bran discharge port at the bottom of the cyclone, the purified air that reverses upwards inside the cylinder and the bran powder flowing down the cylinder surface are separated, completely preventing the above-mentioned accidents caused by the discharge of bran-containing wind. It is possible to achieve complete automation of the work of taking out the inner bran powder, and there are effects such as being able to always carry out an efficient polishing and bran removal operation.

[Brief explanation of the drawing]

The drawings are illustrations of embodiments of the present invention. FIG. 1 is a side sectional view of the present device, and FIG. 2 is a partially cutaway perspective view of the rice bran collecting tank. 1... Rice milling machine, 2... Supply hopper, 3... Box-shaped machine frame, 4... Porous wall bran removal polishing tube, 5... Refining trochanter, 6... Grain feeding spiral trochanter, 7... Rotation Main shaft, 8...
... Semen chamber, 9... Compression lid, 10... Outlet, 11
... Supply port, 12 ... Outer peripheral wall, 13 ... Bran removal chamber,
14...Exhaust fan, 15...Cyclone, 16...
Air pipe, 17... Exhaust pipe, 18... Air supply pipe, 19
A... Cylindrical body, 19B... Conical cylinder body, 20... Bran discharge port, 21... Bran collection tank, 22... Bran extraction port, 23
...Rotary wheel for scraping, 24...Detection sensor, 2
5...Deceleration motor, 26...Opening/closing valve, 27...
Bag for rice bran filling.

Claims (1)

[Claims] 1. A bran collection tank is connected to the bran discharge port of the cyclone connected to the bran removal chamber of the rice milling machine, and a bran extraction port is provided at the bottom of the tank, and a bran removal port is provided at the top of the tank for scraping out bran powder. A rotary impeller is provided, a detection sensor for detecting an arbitrary predetermined amount of bran is provided on the inner wall of the bran collection tank, and the impeller is rotated based on the detection signal to take out the bran powder. A bran extraction device for a rice milling machine.