JPH0475063B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a ventilation bran removal device for a grain milling machine for improving the efficiency of ventilation bran removal.

Conventional technology and its problems In general, in the milling operation of a grain milling machine in which a milling trochanter is mounted on a rotating horizontal shaft, in the lower half of the milling chamber, the grain's own weight prevents the grain from being guided upstream. As a result of significant stagnation, the grain density increases dramatically, resulting in overpressure, resulting in a drastic decrease in the rotation speed of the grains, roughening the grain surface, reducing the aeration ability to remove bran, and causing grain breakage. It has defects, and in the upper half of the milling chamber,
The grains are accelerated by the rotational force of the milling trochanter and their revolution speed increases dramatically, resulting in problems such as the grain density becoming thinner and the impact increasing, inducing the generation of grain fragmentation.

Purpose of the Invention In view of the above-mentioned drawbacks, the present invention prevents the aforementioned roughening of the grain surface and decrease in aeration force due to a drastic decrease in the rotational speed of the grain, and also promotes the upstream guidance of the grain to prevent the occurrence of dilute density. A ventilation and bran removal device for a grain milling machine that prevents the occurrence of grain breakage, improves milling efficiency by activating the ventilation and bran removal action in the milling room on average, and consistently performs efficient milling action to ensure high-quality polished rice. The purpose is to provide

Structure of the Invention The ventilation and bran removing device for a grain milling machine of the present invention has a porous wall polishing tube for removing bran horizontally mounted inside a box-shaped machine frame, and a rotating horizontal shaft mounted inside the porous wall polishing tube. In a grain milling machine in which a milling chamber is formed by mounting a milling trochanter on a shaft, blocking walls are provided between the inner wall surfaces on both sides of the machine frame and the wall surfaces on both sides of the porous-walled milling cylinder, so that the upper and lower parts of the inside of the machine frame are separated. A bran removal chamber is formed on the outer periphery of the upper half of the porous-walled whitening cylinder, and a ventilation chamber is formed on the outer periphery of the lower half, and an opening is provided on the wall surface of the bran removal chamber of the machine frame. The present invention has a configuration characterized in that an air exhaust path communicating with an air exhaust fan is connected.

DESCRIPTION OF EMBODIMENTS The structure of the present invention will be explained based on FIGS. 1 to 4. Reference numeral 1 denotes a box-shaped machine frame, in which a porous wall polishing cylinder 2 for removing rice bran is horizontally suspended, and a rotating horizontal shaft 3 is inserted into the frame, and the shaft 3 is supported by bearings 4 and 5. A polishing trochanter 6 and a spiral trochanter 7 such as grinding rolls are respectively supported on the rotating horizontal shaft 3, and the outer periphery thereof is formed into a milling chamber 8, and a supply tank 9 is provided on the rice supply side of the milling chamber 8. and a rice discharge port 11 equipped with a resistance lid 10 on the rice discharge side (see Fig. 2).
Blocking walls 12, 12 are respectively provided between the inner wall surfaces on both sides of the machine frame 1 and the wall surfaces on both sides of the porous wall polishing tube 2 to block ventilation in the upper and lower parts of the machine frame 1. A bran removal chamber 13 is formed on the outer periphery of the upper half of 2, and an air supply chamber 14 consisting of an air supply tube is formed on the outer periphery of the lower half of the machine frame 1, and an opening 15 provided in the wall surface of the bran removal chamber 13 of the machine frame 1, Exhaust passage 17 connecting the exhaust fan 16
18 is a ventilation window provided on one side of the machine frame that communicates with the ventilation chamber 14, and 19 is a receiving box for fine particles.

The operation of the above configuration will be explained below. The grains (brown rice) put into the supply tank 9 are sent to the milling room 8
Flows down to the milling trochanter 6 and is refined by the rotation of the milling trochanter 6.
The bran powder generated by the whitening action is removed by the exhaust fan 16.
The suction force causes the air supply chamber 14 to flow through the air supply window 18.
The wind that flows in from the bottom to the top flows into the milling room 8, and the bran-containing wind containing rice bran is collected in the rice bran removal room 13 and is discharged outside the machine via the ventilation path 17 and the ventilation fan 16. In addition, the milled white rice is removed from the rice discharge port 11.
and is taken out of the aircraft.

In the ventilation bran removing device of the present invention, the wind flowing from the porous wall surface of the lower half of the polishing tube 2 due to the suction force of the exhaust fan 16 increases the wind speed and flows into the polishing chamber 8. The generated wind force floats the grains concentrated in the lower half of the milling surface 8, reducing the grain density, and also promotes the rotation of the grains. In addition to preventing the generation of crushed grains due to rough shaving and overpressure, the ventilation force is increased to activate the bran removal action.In addition, in the upper half of the milling room 8, the increase in the wind force promotes the upstream guidance of grains and removes the grains. Since the grain density is increased appropriately, the generation of crushed grains due to the thinning of the grain density mentioned above is prevented,
High-efficiency whitening action can be carried out reliably and smoothly around the entire circumference of the porous-wall whitening cylinder 2.

Next, in the second aspect of the present invention, control valves 20 and 21 for controlling the wind speed and air volume are provided inside the air supply chamber 14 or the bran removal chamber 13, so that the whitening chamber 8 It concentrates strong wind power on the part where the grain density increases sharply, and ventilates over the entire length of the cylinder, promoting uniform rotation of grains throughout the milling, which is particularly effective in preventing coarse graining and improving bran removal efficiency. There are effects that can be expected to improve.

In addition, in the conventional grain milling machine (see Fig. 5), a porous wall polishing cylinder 2A for removing bran is installed horizontally in a box-shaped machine frame 1A, and a collector connected to a blower 16A is connected to the lower part of the polishing cylinder 2A. A bran cylinder 23 is provided to collect the wind flowing into the polishing chamber 8A from the main pipe shaft 24 for ventilation and bran removal equipped with a polishing trochanter 6A and the bran powder generated by the polishing action from the porous wall surface on the entire circumference of the polishing cylinder 2A. The grain density in the polishing chamber 8 is as shown in FIG. The rice discharging side provided with the resistance lid 10 shown in FIG. 1 receives the resistance force, and the grain density increases extremely, and the polishing action becomes fully active.

In addition, when looking at the grain density in a normal cross section of the milling chamber 8A, (see Figure 5), in the lower half of the milling chamber, grains stay and the grain density increases dramatically, and at the same time, the milling trochanter 6A As a result of the rotation of Grain density becomes dilute. Therefore, the present invention aims to provide a solution to the above-mentioned part of the milling room where the grain density is particularly rapidly increased.
In order to concentrate strong wind power and appropriately correct grain density, the air supply chamber 14 is provided with an air supply control valve 20, and the bran removal chamber 13 is provided with an air exhaust control valve 21. The rotary valve 20A, which is pivoted in the air supply chamber 14 shown in FIGS. 1 and 2, supplies strong wind intensively to the rice discharging side of the milling chamber 8 by tilting the upper end of the valve plate to the right side in the figure. The opening/closing valve 20B, which is pivotally mounted via the guiding partition wall 22 provided in the air supply chamber 14 shown in FIG. The grain layer A formed on the right side of the bottom of the milling chamber 8 is tilted to the position indicated by the two-dot chain line, and strong wind is supplied to the grain layer A formed on the right side of the bottom of the milling chamber 8 to increase the ventilation force in that area. Exhaust guide valves 21A, 2 provided on both sides in 13
1B is suitable for appropriately correcting the grain density and ventilation force in the milling chamber 8 by opening them as shown in the figure and appropriately guiding the wind flowing upstream from the lower ventilation chamber 14. Both of the control valves 20 and 21 have the effects described above.

It should be noted that the shape and structure of each of the control valves 20 and 21 described above are not limited to those shown in the drawings, and can of course be changed as appropriate, and the valve plate may be divided into a plurality of pieces for use. In addition, a grinding type or friction type trochanter may be used as the whitening trochanter, a main ventilation shaft may be used as the whitening trochanter shaft, and an exhaust fan may be installed separately from the aircraft body. .

Effects of the Invention As explained above, according to the present invention, it is possible to prevent the above-mentioned rough cutting of the grain surface and decrease in ventilation force due to a drastic decrease in the rotation speed of the grain, and to promote upstream guidance of the grain to achieve a thin density. It can prevent the granulation that occurs,
Effects such as uniformly activating ventilation and bran removal throughout the milling room to greatly improve milling efficiency, and the simple structure ensure high-quality milled rice by consistently performing high-efficiency milling and bran removal. There is.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of this device, FIG. 2 is a front sectional view thereof, and FIG. 3 is a front sectional view of a second embodiment of this device.
FIG. 4 is an enlarged sectional view of the main part of the third embodiment,
FIG. 5 is a front sectional view of a conventionally known grain milling machine. 1, 1A... Box-shaped machine frame, 2, 2A... Porous wall polishing cylinder for removing bran, 3... Rotating horizontal shaft, 4, 5... Bearing,
6...Sperm trochanter, 7...Spiral trochanter, 8,8A...
Refining room, 9... Supply tank, 10... Resistance lid, 1
1... rice discharge port, 12... blocking wall, 13... bran removal chamber, 14... ventilation chamber, 15... opening, 16, 16
A...Exhaust fan, 17...Air exhaust path, 18...Air supply window, 19...Fine particle receiving box, 20...Control valve, 20
A... Rotating valve, 20B... Opening/closing valve, 21... Control valve, 21A, 21B... Guide valve, 22... Guide partition wall, 23... Bran collecting tube, 24... Ventilation for removing bran Main pipe axis.

Claims (1)

[Scope of Claims] 1. A porous wall polishing cylinder for rice bran removal is suspended horizontally inside a box-shaped machine frame, and a polishing trochanter is mounted on a rotating horizontal shaft mounted inside the porous wall polishing cylinder for polishing. In the grain milling machine having a chamber, blocking walls are provided between the inner wall surfaces on both sides of the machine frame and the wall surfaces on both sides of the porous wall milling tube to block ventilation in the upper and lower parts of the machine frame, and A rice bran removal chamber is formed on the outer periphery of the upper half of the wall polishing cylinder, and an air supply chamber is formed on the outer periphery of the lower half, respectively, and an air exhaust is provided in the opening provided on the wall of the rice bran removal chamber of the machine frame to communicate with an air exhaust fan. A ventilation bran removal device for a grain milling machine characterized by connecting channels. 2. The ventilation bran removal device for a grain milling machine according to claim 1, wherein a control valve for controlling wind speed and air volume is provided inside the ventilation chamber or the bran removal chamber.