The negative pressure two-way multi-channel air inlet rice machine can be divided into grinding type sand roller rice machine and friction iron roller rice machine, which improves the utilization rate of the new rice milling machine and realizes one machine and dual purpose.
1. Grinding sand roll rice machine
The structure diagram of the grinding sand roll rice machine is shown in Figure 1. It consists of a rack and an exhaust fan. The rice milling chamber is fixed on the rack. The feeding device is installed in the upper part of the rice milling chamber. The bran collecting hopper is installed in the lower part of the rice milling chamber. The air inlet is set at both ends of the hollow shaft. The rice outlet is equipped with a device for cleaning cold rice. The inclined guide plate is installed in the rice outlet. The lower part of the guide plate is equipped with a device for cleaning cold rice. The characteristics of the grinding type sand roller rice machine are that the pressure of the rice milling chamber is low and the line speed of the rice milling roller is high.
Because the grinding only exists between the rice mill roller and the brown rice, the brown rice and the bran drum, and the negative pressure bidirectional multi-channel air intake, the rice crushing rate is low. During the working process, the brown rice enters the end of the rice milling chamber from the feed hopper through the flow adjustment mechanism and is pushed into the inside of the rice milling chamber by the rotating screw propeller. When the brown rice fills the rice milling chamber, the spiral advances continuously. Push the brown rice into the rice milling chamber to increase the pressure continuously. When the pressure of the brown rice group is large enough to overcome the resistance of the pressure door at the outlet, the outlet is opened, the rice grains are discharged from the rice milling room, and the brown rice is imported from the rice machine The outlet is always subjected to grinding, and the skin layer is gradually peeled to become rice bran, which is discharged through the holes of the bran discharge cylinder, and finally, rice milling is completed. A cool rice cleaning device is arranged at the discharge port to further cool the rice grains.
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2.Friction type iron roller rice machine
The structure diagram of the friction iron roller rice machine is shown in Figure 2. The friction type iron roller rice machine is characterized by high pressure in the rice milling chamber and low linear speed of the white roller. Since friction exists in the entire brown rice group in the whole rice milling room, and every grain of brown rice is involved, the uniformity of rice milling is high, but the corresponding broken rice rate is also high. Therefore, the iron roller rice machine is suitable for processing horny rice with good skin toughness and high grain strength.
