JPS5857224B2 - grain polishing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a grain polishing device for imparting gloss to the surface of polished rice.

Conventional polishing devices of this type tend to abrade the starch cell membrane on the surface layer of polished rice, which not only fails to provide the necessary luster, but also reduces the commercial value of the polished rice.

The present invention has been made in view of the above-mentioned conventional problems.
A polishing chamber made of a regular polygonal wire mesh formed on the inner surface of the grain to be rubbed to a degree that does not cause abrasion on the surface of the grain, and an outer surface arranged coaxially within the polishing chamber and separated from the inner surface of the polishing chamber by a predetermined gap. Equipped with a cylindrical polishing rotor that gradually curves in the direction of diameter reduction from the end, the surface layer of polished rice can be polished in the direction along the surface, between grains, between grains, without destroying the starch cell membrane. Pressure is applied between the inner surfaces of the wire mesh that forms the chamber, giving the surface a glossy appearance without abrading the starch particles, improving the commercial value of the polished rice.At the same time, the polishing rotor is installed inside the polishing chamber to increase polishing efficiency. At the same time, a blowing opening is provided outside the polishing chamber to supply clean and humidified air and at the same time discharge the free aleurone layer remaining on the surface of the polished rice to the outside of the polishing chamber.
A new grain polishing device is provided which is equipped with a blow nozzle for blowing away powder particles of an aleurone layer discharged from a mesh in a polishing chamber to prevent clogging.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 1, the grain polishing apparatus includes a rough polishing machine 1 and a finishing polishing machine 2, which are arranged in two rows, an electric motor 4 that rotates a polishing rotor 3 of the rough polishing machine 1, and a finishing polishing machine. an electric motor 5 for rotating the polishing rotor 3 of No. 2;
Air washer 6 that supplies clean and humidified air to 3
It also includes a blower 7 and a blower 10 that supplies air to the blast nozzles 9, 9 of the polishing chambers 8, 8.

Each of the polishers 1 and 2 has a regular polygonal shape (for example, a hexagonal shape).

Cylindrical polishing chamber 8 made of wire mesh 11.11 (see Figure 2a)
, 8, and the inner surfaces of the polishing chambers 8, 8 form a frictional surface that does not cause abrasion on the grain surface as much as possible, and discharges the released powder particles of the aleurone layer to the outside. It has a mesh structure that is easy to clean.

One side of the polishing chambers 8, 8 has an input port 12, 12 at the top.
The supply chamber 13.13 having a
The polishing chambers 8, 8 are surrounded by sealed blowing chambers 16, 16 in which the blow nozzles 9, 9 are arranged.

An input hopper 17 is attached to the input port 12 of the upper polishing machine 10, and the output port 15 and the input port 1 of the lower polisher 20
2 are connected by a duct 18 to form a two-stage polishing machine (upper and lower).

In each of the polishing chambers 8, 8, supply chambers 13 and 13 are supplied from the outside.
A hollow rotating shaft 21.21 extending concentrically through the polishing chambers 8, 8 is arranged, and a half-shaped shaft is attached to the tip of the rotating shaft 21.210, as shown in FIG. 2a. The cylindrical bodies are shifted in the radial direction and the polishing rotors 3, 3 having slit-shaped blast openings 22, 22 are fixed thereto.

The rotating shaft 21.21 corresponding to the opening 22.22 of the polishing rotors 3, 3 has small holes 23 for air supply.
..., 23 are drilled in large numbers, and clean and humidified air supplied from the rear end of the rotating shaft 21° 210 is passed through the small holes 23.・・・・・・
..., 23, and is supplied into the polishing chambers 8, 8 through the openings 22, 22.

The polishing rotors 3, 3 thus have an outer end 3a.

As shown in FIG.
A predetermined gap C1 between the friction inner surface and the rice grain, that is, a gap C1 slightly wider than the vertical dimension of the rice grain, is maintained, and a gap C2 between the friction inner surface and the outer peripheral portion is configured to be C1 minus C2.

The polishing rotor 3 of the finishing polisher 2 has an outer end 3a, as shown in FIGS. 3a and 3s.

A flexible and wear-resistant blade 24 made of urethane or the like is fixed to the blade 3a with a screw 25, and its free end is brought into contact with the frictional inner surface of the polishing chamber 8.

To add more information about the structure of the polishing rotors 3, 3, generally when removing the bran layer from brown rice, a rotor 26 as shown in Fig. 4a is used, and a protrusion 27 is provided on the outer end 26a. For the friction inner surface, a wire mesh 28 with a rough surface that can increase the friction coefficient is used.

This is because when the rotor 26 rotates, the grains are caught on the protrusions 27 and the grains are appropriately reversed and agitated, and grain-by-grain friction acts effectively to abrade the bran layer.

On the other hand, since the purpose of the present invention is to give luster only to the surface of polished rice from which the bran layer has been completely rubbed off, the protrusions 27 are not provided, and as shown in FIG. , rotation axis 2
The distance difference between the axis of 1 and each part of the friction inner surface is b>a, b>c
, there is a situation where d>c.

Therefore, the grains are compressed → released → compressed → and so on repeatedly on the friction inner surface by the polishing rotor 3, and the process is repeated between the grains, between the grains, between the polishing rotor 3 and the grains, and between the grains. Since pressure is applied between the particles and the frictional inner surface and they slide together, the starch layer on the surface of the particles is not destroyed and shines.

Further, the polishing rotor 3 for the final polishing machine 2 performs a smooth finish by pressing the particles against the wire mesh 11 during rotation using softer blades 24 with weak elasticity during the finishing process.

Rotating shaft 21 in the supply chambers 13, 13 of each of the polishing machines 1, 2
, 21 are provided with screws 29, 29 to connect the input port 1.
The grains 2 and 12 are fed into polishing chambers 8 and 8.

On the other hand, each of the rotating shafts 21, 21 is rotatably supported by bearing members 30, 30 outside the polishing machine 1.
It is connected to electric motors 4 and 5 via the electric motors 4 and 5, and is rotationally driven by the electric motors 4 and 5.

The air washer 6, which supplies clean and humidified air to the rear ends of the rotating shafts 21, 210, is installed at the bottom of the tank body 34 in the form of a closed box, as shown in detail in FIGS. 5a and 5. It has a water supply port 35 and a drain port 36, and forms a water storage section 37 that can be supplied and drained from the outside.
The inner width direction of the chamber 41 is partitioned by a partition plate 40 that hangs down from the ceiling 38 and forms a certain air passage 39 above the water surface of the water storage section 37, and an air supply proar 7 ( (see Figure 1) and connect the duct 42 of the other chamber 4.
A duct 45 for supplying clean and humidified air to the polishing machines 1 and 2 is connected to the ceiling of the chamber 3 through a water droplet removing rim and a drainer 44, while a large number of water spray nozzles 46 are connected to the sides of each of the chambers 41 and 43. ．． . . . , 46 are arranged, and the water spray nozzle 46. .......

46 is connected to a pump 47 that circulates and supplies water from the water storage section 37 through valves 48 and 48.

Therefore, when the proar 7 is connected to the pulley 49 of the rotating shaft 21 on the polishing machine 1 side via the belt 50 and driven, the air sent from the proar 7 enters the chamber 41 from the duct 42 of the air washer 6. Water nozzle 46.・・・・・・
The dust in the air is washed away at the same time as it is humidified by the water sprinkling by the eliminator 46, and when it enters the chamber 43 from the air passage 39, it is also humidified and the dust is washed away, and water droplets are removed by the eliminator 44. After that, the polishing machine 1 is removed from the duct 45.
It comes to be fed to the rear end of the rotating shaft 21 at .degree.

Next, the blowing nozzles 9, 9 disposed in the blowing chambers 16, 16 direct their blowing ports toward the wire meshes 11, 11 of the polishing chambers 8, 8, and the starch powder discharged from the meshes of the wire meshes 11, 11. This is to prevent clogging by blowing away the powder particles in the layer, and is driven by the prower 10 connected via the pulley 51 of the rotating shaft 21 on the polishing machine 2 side and the belt 52, through the duct 53. I'm trying to supply air.

The powder particles blown away by the blast nozzle 9°9 may be deposited on the bottom surfaces of the blowing chambers 16, 16 and discharged to the outside at an appropriate time.

If the grain polishing device is configured as described above, the electric motors 4, 5
, the floor 7.10 and the pump 47 are driven to continuously feed polished rice into the input hopper 17 of the rough polishing machine 10, and it is sent to the polishing chamber 8 by the screw 29 of the supply chamber 13, where it is transferred to the polishing rotor. Rough polishing is performed by the action of 30 rotations, and the supply chamber 1 of the finish polishing machine 2 is supplied from the discharge port 15 via the duct 18.
On the other hand, it is sent to the polishing chamber 8 by the screw 29 of the supply chamber 13, where it is finished polished by the rotating action of the polishing rotor 30, and is discharged to the outside from the discharge port 15. .

At this time, when the prower 7 is driven, air that has been cleaned and humidified by the air washer 6 is passed from the rotating shaft 2L21 through the openings 22° 22 of the polishing rotors 3, 3 to the polishing chamber 8,
8, the polishing efficiency of the milled rice is increased, while the blower 10 drives the blast nozzles 9, 16 of the blowing chambers 16, 16.
Air is supplied to 9 to prevent clogging of the wire mesh.

In this way, the polished rice discharged from the discharge port 15 of the finishing polisher 2 has a glossy surface without having starch particles removed.

As is clear from the above description, in the present invention, a polishing rotor having an outer end separated from the friction inner surface by a predetermined gap is placed in a polishing chamber made of a regular polygonal metal mesh, so that particles can be
By applying pressure between the polishing rotor and the inner surface of the wire gauze, it is possible to give gloss to the surface of the polished rice without abrading the starch particles, thereby improving the product value.

In addition, since clean and humidified air is supplied into the polishing chamber, the polishing efficiency of polished rice is increased, and the free aleurone layer can be discharged outside the polishing chamber.Furthermore, since the wire mesh in the polishing chamber is blown away with air, It prevents clogging and can be operated continuously for a long period of time.

[Brief explanation of drawings]

Figure 1 is a layout of the grain polishing device, Figure 2a is a sectional view of the polishing rotor of the rough polisher, Figure 2 is an enlarged view of the main part of Figure 2a, and Figure 3a is the final polisher. A sectional view of the polishing rotor of the machine, Figure 3 is an enlarged view of the main part of Figure 3 a, Figure 4 a is an enlarged view of the main part of the conventional polishing rotor, and Figure 4 shows the polishing chamber and polishing rotation. FIG. 5a is a side view of the air washer, and FIG. 5a is a front view of the air washer. 1... Rough polishing machine, 2... Finish polishing machine,
3...Polishing rotor, 6...Air washer-18...Polishing chamber, 9...Blow nozzle, 11...Wire mesh , 13... supply room, 16... blowing room.

Claims (1)

[Claims] 1. A polishing chamber made of a regular polygonal metal mesh formed on the inner surface of friction that does not cause abrasion on the grain surface, and a polishing chamber arranged coaxially within the polishing chamber and separated from the friction inner surface of the polishing chamber by a predetermined gap. The polishing rotor is provided with a cylindrical polishing rotor that gradually curves in a diameter-reducing direction from the outer end, and the polishing rotor is provided with an opening for supplying clean and humidified air into the polishing chamber. A grain polishing device characterized in that a blast nozzle is provided outside the chamber for blowing away powder particles of the aleurone layer discharged from the mesh of the polishing chamber.