Main components of rice mill

1.Rice milling room

The rice milling room shown in the figure is the core part of the rice mill. There are hollow shafts, sand rollers, iron rollers, rice sieve, etc. in the rice milling room. See Figure 3 for the assembly drawing of the hollow shaft, screw head and main shaft compression sleeve. The sand roller with ventilation holes is sleeved on the outside of the hollow shaft, the rice sieve is sleeved on the outside of the sand roller, and the rice sieve bead is fixed on the rice sieve. The screw head is fixed at the feed end of the hollow shaft. The main shaft compression sleeve is fixed on the outside of the screw head. The screw head is provided with an air inlet hole 1. The main shaft pressure sleeve is provided with an air inlet hole 2. The hollow shaft is provided with an air inlet port 1. And air inlet two, so that a sandwich air inlet channel is formed outside the hollow shaft in the rice milling room.

It can be seen from FIG. 3 that the air inlet 1 and the air inlet 2 constitute the main shaft two-way air inlet and the air inlet channel becomes four channels. The increase of the air inlet volume and pressure of the rice milling chamber keeps the material in a suspended state, which greatly reduces the influence of gravity on the material and improves the rice milling efficiency. The pressure in the rice milling room gradually becomes consistent with the expansion of the air inlet area. The negative pressure exhaustion fully reduces the rice temperature, makes the bran discharge more sufficient, and is not easy to block. The sieve area is effectively used, the crushing rate is reduced, and the yield is increased.

2.Structure of sand roller and iron roller

Sand roller and iron roller are the main working parts of the rice milling room. The structure diagram of the sand roller is shown in the figure. The inner wall of the sand roller is provided with a fixing sleeve 24. The sand roller and the hollow shaft are connected through the fixing sleeve, and the fixing sleeve is provided with a ventilation hole.

The structure diagram of the iron roller is shown in the figure. The inner wall of the iron roller is provided with a fixing sleeve, which is connected to the hollow shaft through the fixing sleeve. The fixing sleeve is provided with a ventilation hole.

3.Feeding device

The structure diagram of the feeding device is shown in the figure.

It consists of a feed hopper, a feed door, an ejector and a lever mechanism. A feeding hopper is installed at the position of the feeding opening of the rack, and an inclined feeding door is installed in the feeding hopper. One end of the feeding door is fixed on the ejection rod and can swing up and down by a spring on the ejection rod. One end of the push rod is connected to the feed door, and the other end is connected to the lever mechanism; the other end of the lever mechanism is connected to the lever; the other end of the lever is equipped with a handwheel, a positioning groove is opened on the lever, and a positioning cover is sleeved on the outside of the lever. A bayonet is also provided on the positioning cover. Rotate the handwheel to control the opening of the feed door.

4. Schematic diagram of cleaning cold rice device structure

The rice mill mouth of the rice mill is equipped with a cold rice cleaning device. The structure is shown in the figure. The cold rice cleaning device can further reduce the temperature of the rice and promote bran drainage. The cold rice cleaning device is composed of a bran tube, a pressure door and a handle. One end of the bran collecting pipe is connected to the bran collecting bucket, and the other end is provided with a split pressure valve, and the pressure door is controlled by a handle of a damper.


The negative pressure bi-directional multi-channel air inlet rice mill greatly increases the air inlet area and air volume of the rice mill, reduces the rice crushing rate, saves energy, and has the characteristics of one machine and two functions. The finished rice processed by this machine has uniform precision, smooth and smooth surface, good color, and low starch.