JPH0312340Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a whitening roll that is installed in the whitening chamber of a one-time rice milling machine and peels off chaff and rice bran.

BACKGROUND TECHNOLOGY As shown in FIG. 7 of the attached drawings, the polishing roll of a conventional single-pass rice milling machine has curved protrusions 12 and 13 on the outer circumferential surface 23 of the polishing roll that obstruct the flow of grains. There were two at equal intervals in the direction.

Problems that the invention aims to solve Since the conventional whitening roll is as described above,
As shown by the dotted line B in Figure 5, the internal pressure that the grains passing through the milling chamber receive is highest near the joint between the grain feeding roll and the milling roll, and at the tip of the milling chamber/milled rice outlet side. As the grains are transferred to the dryer, the peeling of the rice hulls, rice bran, etc. (hereinafter referred to as rice hulls, etc.) occurs. The whitening power also decreases.

For this reason, if you try to use a resistor plate installed at the tip of the whitening chamber and the polished rice discharge port to level it out without reducing the internal pressure in the whitening chamber and increase whiteness, the rice will be discharged first. The amount of white rice that is used in rice production decreases,
Rice milling efficiency decreases. In addition, since strong external pressure is applied to the discharge port side, there is a drawback that polished rice tends to stick inside the milling chamber and operation becomes impossible.

The purpose of this invention is to level out the internal pressure that grains passing through the milling chamber undergo as a result of the peeling action of chaff, etc., to a high level from the inlet to the outlet, thereby improving milling performance. be.

Means to Solve the Problem This invention provides a small annular protrusion on the outer periphery of the center of the milling roll, a large annular protrusion on the outer periphery of the end of the polished rice discharge port, and a small annular protrusion between the two annular protrusions. A plurality of linear protrusions are provided between the protrusions and the end of the grain feeding roll in parallel to the axial direction of the milling roll and at equal intervals,
This is a polishing roll for a single pass rice milling machine, characterized in that the number of linear ridges between both annular ridges is larger than that between the small annular ridge and the end of the grain feeding roll.

Function: The flow of grains that are rotated and fed into the milling chamber is temporarily blocked by the annular protrusion in the center of the milling roll, so the internal pressure in that area is higher than in conventional models, and the milled rice is not discharged. The internal pressure also decreases as it progresses toward the outlet, but since multiple linear protrusions are provided parallel to the axial direction and equally spaced, the internal pressure is higher than that of the conventional type. Since an annular ridge is also provided at the end, the flow of grains is temporarily blocked here, increasing the internal pressure that the grains receive.

Therefore, the internal pressure that the grains receive in the milling chamber can be leveled out at a higher pressure from the inlet to the outlet than in the conventional type.

Embodiment An embodiment of this invention will be explained with reference to the accompanying drawings. As shown in FIGS. 1 to 3, a whitening roll 3
A small annular protrusion 6 is provided at the center of the plate, and a large annular protrusion 7 having a larger diameter than the small annular protrusion 6 is provided on the outer periphery of the polished rice discharge port side end 22b. Then, on the cylindrical surface between both the annular protrusions 6 and 7, four linear protrusions 8 and 9
10 and 11 are provided parallel to the axial direction and at equal intervals from each other, and similarly, two linear protrusions 4 are provided between the annular protrusion 6 in the center and the grain feeding roll side end 22a of the main cylindrical part 22. , 5 is provided.

The one-time rice milling machine equipped with this milling roll 3 is constructed as shown in Fig. 6, and grains such as unhulled rice or brown rice that are put into the grain tank 14 fall through the grain tank and are sent to the lower part. We reach roll 2.

One end of the grain feeding roll 2 is connected to the main motor 24 for rice milling.
The other end is connected to the milling roll 3, which is rotated by the operation of the main motor 24 to remove the dropped paddy rice and
The grains such as brown rice are sent to the milling room 1. Whitening room 1
is formed by a milling roll 3 that is joined to the grain feeding roll 2 and rotates as the grain feeding roll 2 rotates, and a bran removal wire mesh 15 that surrounds the milling roll 3, and the grains fed into the milling chamber 1 are The white rice is separated into chaff, rice bran, etc. by the peeling action between the whitening roll 3 and the bran removal wire mesh 15 that occurs as the whitening roll 3 rotates, and the white rice is discharged out of the machine through the white rice gutter 19. At the same time, the rice hulls, etc. fall through the bran removal wire mesh 15 and pass through the duct 20.
The air is sucked into the suction blower 21 through the exhaust pipe (not shown) and discharged to the outside of the aircraft.

In addition, a resistance plate 16 with a spring 17 is provided near the tip of the white rice gutter 19 side of the whitening chamber 1, and the internal pressure in the whitening chamber can be adjusted by operating the spring 17 with the resistance dial 18 and adjusting the pressure of the resistance plate 16. I'm trying to change.

The grains fed into the milling chamber 1 are polished as they move through the milling chamber 1, so when they reach the annular ridge 6 in the center, their flow is temporarily blocked and they stagnate. , the internal pressure applied to this increases.

As the grain progresses through the annular protrusion 6, the internal pressure decreases as the milling progresses, but the flow is temporarily blocked at the annular protrusion 7, which has a larger outer diameter than the annular protrusion 6.・Since it is stagnated, the internal pressure applied to it increases.

Therefore, the distribution state of the internal pressure applied to the grains passing through the milling chamber 1 is as shown in the internal pressure curve in FIG.
Compared to the conventional whitening roll internal pressure curve B, it has become possible to level out the pressure at a higher level, so the whitening efficiency has increased from 33 minutes compared to the conventional whitening roll for milling 20 kg of white rice, as shown in Figure 4. The milling time can be reduced by about 20% by about 6 minutes to 27 minutes, and the amount of rice milled per horse power hour has increased from 50 to 55 Kg/h-Ps to 60 Kg/h-ps.
The above was accomplished.

Effects of the idea This idea can be achieved. ``Since this device is constructed as described above, the grains passing through the milling chamber are sent toward the center of the milling roll by the linear ridges between the small annular ridges and the ends of the grain feed rolls, and are The grain is subjected to resistance from the ridges.Furthermore, the grain is sent along the linear ridges between both annular ridges and receives resistance from the large annular ridges, but this resistance is greater than the resistance from the small annular ridges. .

Therefore, in the whitening room, areas with weak whitening power usually experience a large resistance, and conversely, areas with strong whitening power receive a small resistance, so that an average whitening power can be obtained over the entire length of the whitening roll.

Therefore, unlike conventional methods, it is possible to apply even pressure to the grains passing through the milling chamber without increasing the pressure of the resistance plate at the discharge port, reducing the amount of milled rice discharged and improving the milling process. There is no chance of grains sticking together indoors.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an embodiment of the present invention, Fig. 2 is a front view, Fig. 3 is a cross-sectional view taken along the line - - in Fig. 2, and Fig. 4 is a whitening efficiency of the conventional whitening roll and that of the present invention. Figure 5 is a comparison diagram of the internal pressure distribution state in the milling chamber of the conventional milling roll and the milling roll of the present invention.
The figure is a longitudinal sectional view of a single pass rice milling machine equipped with the polishing roll of the present invention, and FIG. 7 is a perspective view of a conventional polishing roll. 3... White roll, 4, 5... Linear protrusions, 6, 7...
Annular protrusion, 8, 9, 10, 11... protrusion.

Claims (1)

[Scope of utility model registration request] A small annular protrusion is provided on the outer periphery of the central part of the milling roll, and a large annular protrusion is provided on the outer periphery of the end on the polished rice discharge port side, and between both annular protrusions and between the small annular protrusion and the end of the grain feeding roll. A plurality of linear protrusions are provided parallel to the axial direction of the milling roll at equal intervals, and the linear protrusions between both annular protrusions are arranged between the small annular protrusions and the end of the grain feeding roll. A whitening roll of a single-pass rice milling machine, which is characterized by having a larger amount than that of .