JPH03146137A - Vertical grain polishing machine - Google Patents

Abstract

PURPOSE:To permit an even grain polishing by a method wherein a grain polishing chamber is provided at its lower part with an air supply opening in communication with an air supply device and with an air discharge opening at its upper part. CONSTITUTION:A freely rotatable vertical shaft is provided within a vertically set grain cleaning cylinder 2 and fitted with a screw roller 4 and a polishing roller 5. A grain polishing chamber 6 consisting mainly of the grain cleaning cylinder 2 and the grain polishing roller 5 is connected at its lower part with a grain supply part 7 and at its upper part with a grain discharge part 8. The grain polishing chamber 6 is provided at its lower part with an air supply opening 11 in communication with an air supply device 12 and with an air discharge opening 32 at its upper part. As a result, an even grain polishing becomes possible.

Description

Detailed Description of the Invention [Prior Art] A vertical grinding type grain milling machine that feeds grain from the lower part, mills the grain, and discharges it from the upper part has already been proposed in, for example, Japanese Patent Laid-Open No. 13083/1983. has been done. This product has a spiral rotor at the bottom of the vertical shaft and a grinding rotor at the top of the spiral rotor.
A polishing tube is provided concentrically with the vertical shaft with a space between the two trochanters, and a grain supply section is provided at the bottom of the polishing tube, and a grain discharge section is provided at the top. Then, the grains supplied from the supply section are lifted up by a spiral trochanter and milled in a grain milling room whose main parts are a grinding trochanter and a milling tube.

However, in this vertical shaft grain milling machine, there is a pressure difference between the top and bottom of the grains in the grain milling chamber due to gravity, and the pressure is large at the bottom of the grinding rotor, preventing the agitation and flow of the grains. There is a problem that only the rice grains that come into contact with the grain trochanter are subjected to excessive milling action, and the rice grains that do not come into contact with it are hardly subjected to the grain milling action, resulting in so-called uneven grain polishing. could not be made larger.

[Problem that the invention seeks to solve]

This invention solves the above-mentioned problems, reduces as much as possible the density difference caused by the pressure difference between the grains above and below the grain milling chamber of a vertical grinding type rice milling machine, and improves the optimum grain density for the grinding type rice milling machine. Ensures grain density, promotes grain agitation, and improves grain-to-grain
To provide a vertical grinding type grain milling machine capable of uniformly milling whole grains.

[Means for solving problems]

In order to achieve this object, the present invention installs a spiral rotor and a grinding grain trochanter into a vertical shaft rotatably provided in an upright polishing cylinder, and the polishing cylinder and the grinding grain trochanter are used as main parts. In a vertical grinding type grain milling machine in which the lower part of the grain milling room is connected to the grain supply part and the upper part is connected to the grain discharge part, a ventilation port is provided in the lower part of the grain processing room, and the ventilation port is connected to the grain supply part. In addition to connecting to the air blower, a ventilation outlet was installed in the upper part of the grain milling room. Further, the bottom surface of the grain milling room is formed into a rotating disk which is fixed to the vertical shaft or the spiral rotor with a slight gap from the milling cylinder, and the lower part of the rotating disk is formed into an air chamber, and the air chamber is used as an air blower. The structure is such that the minute gap is used as an air outlet and an air exhaust port is provided in the upper part of the grain milling chamber. A swirl groove is provided in the small gap, and the air volume rising through the grain milling chamber can be adjusted by connecting the air chamber to the air exhaust passage of the hollow vertical shaft, which has a closed lower end and an open upper end. An air volume adjustment device is installed above the air exhaust.

[For production]

The grains supplied from the grain supply section of the vertical grinding type grain milling machine to the spiral rotor are ground while being subjected to the grain lifting action by the spiral rotor and the grain raising action accompanied by the stirring flow caused by the rising air from the ventilation opening. The grain is sent to the grain trochanter.

The grains that have reached the grinding trochanter are subjected to buoyancy by the air blast, reducing the grain density and promoting agitation flow, which alternately contacts the surface of the grinding trochanter and causes the grains to The entire grain is subjected to uniform milling action and is discharged from the grain discharge section at the upper end of the grinding grain trochanter. When air is blown from the air chamber provided at the bottom of the grain milling chamber toward the small gap between the milling cylinder and the rotating disk, in addition to the above effects, it accumulates in the lower part of the grain milling chamber and sticks between the rotating and non-rotating parts, creating rotational resistance. The bran and dust containing oil and other substances are removed upwards.

Then, air is blown into the grain milling chamber in a swirling manner, and by adjusting the air volume, the agitation and flow state of the grains is controlled to provide a uniform grain milling action.

〔Example〕

Embodiments of the invention will be described with reference to the drawings. 1st
The figure is a partially cutaway side view of the vertical grinding type grain milling machine, and FIG. 2 is a partially enlarged view of the grain milling room. Reference numeral 1 designates a vertical grinding type grain milling machine, in which a vertical shaft 3 is rotatably provided in a perforated-walled bran removal and polishing cylinder 2, and a spiral rotor 4 is mounted on the bottom of the shaft 3, and a grinding grain milling rotor 5 is mounted on the top. Insert each shaft. Further, the grinding grain trochanter 5 has a concentric cross section, and has cutting edges for grinding (abrasive grains of a grinding wheel) provided on the surface almost all around the circumference. The lower part of the grain milling chamber 6, whose main parts are a porous-walled bran removal cylinder 2, a spiral trochanter 4, and a grinding grain trochanter 5, is connected to a grain supply section 7, and an upper part is connected to a grain discharge section 8, respectively. .

A rotating disk 9 is rotatably provided at the bottom of the spiral rotor 4. An air chamber 10 is provided below the rotary disk 9, and the air chamber 10 communicates with an air blower 1i12 via an air outlet 11. Further, the blower device 12 is installed at a position where a slit hole is provided in the lower side of the milling cylinder 2 shown by a dashed line to prevent grains from entering, so that air can be blown directly into the grain milling chamber 6. A main motor 14 is provided in a base 13, and a driving pulley 16 attached to a main motor shaft 15 and a passive pulley 17 attached to a vertical shaft 3 are connected by a belt 18. The drive pulley 21 of the motor 20 placed on the motor platform 19 and the conveyor shaft 2 of the grain feeding device 22
A passive pulley 24 attached to 3 is connected by a belt 25.

The grain supply device 22 is in communication with the grain supply section 7. The grain discharge section 8 is provided with a resistance lid 27 of a pounding precision adjustment device 26, and the grain discharge section 8 is connected to a discharge gutter 28. Reference numeral 29 is a rice bran collecting chamber, and the rice bran collecting room 29 is connected to a rice bran discharge pipe 31 via an exhaust fan 30.

Next, the operation of the above configuration will be explained. First, the grains are sent to the grain feeding device 22 of the grinding type vertical grain milling machine 1 . When the main motor 1-4 that drives the vertical shaft 3, the motor 20 that drives the grain feeding device 22, and the blower 12 are started, the grains are transferred from the grain feeding section 7 to the spiral rotor 4 by the conveyor shaft 23.
supplied to Grain lifting action by spiral trochanter 4 and blower 12
The grains are transported to the grain milling room 6 by the stirring flow caused by the air blown from the grain mill. In the grain milling room 6, the grains also receive buoyancy from the air, which reduces the density difference between the upper and lower grains, and while the agitation and flow is promoted, the grains are uniformly processed by the grain polishing action generated by the rotation of the grinding grain trochanter 5. Being pumped. The milled grains reach the grain discharge section 8, and are prevented from flowing into the discharge gutter 35 by the resistance cover 27 of the pounding precision adjustment device 26, and the pounding precision is adjusted by changing the degree of suppression of the resistance cover 27. can do. The grains are then sent to the next process from the discharge gutter 35. Grain milling room 6
Dust such as rice bran generated by the polishing action is sent to the rice bran collecting chamber 29 where it is discharged from the hole in the porous-walled rice bran removing and polishing cylinder 2, where it is sucked and pressure-fed by the exhaust fan 30, and then passed through the rice bran discharge pipe 31. It is sent to a bran collector such as a cyclone (not shown). In this grain milling machine, the holes in the porous-wall milling barrel 2 serve as air exhaust ports. In FIG. 2, reference numeral 37 is a minute gap provided between the porous-wall polished cylinder 2 and the rotating disk 9, and 38 is a turning groove provided in the rotating disk 9. Furthermore, it is desirable that the air being blown has a humidity level that does not dry out the rice grains.

FIG. 3 is a diagram of another embodiment, and the same components as those of the vertical grinding type grain milling machine shown in FIG. 1 are given the same reference numerals, and the explanation thereof will be omitted. This vertical shaft grinding type grain milling machine 1a has a spiral rotor 4 at the bottom of a vertical shaft 3 rotatably provided in a non-porous milling cylinder 2a,
On the upper part of the spiral trochanter 4, there is a ground grain trochanter 5 and a spiral trochanter 4a.

This is a so-called multi-stage grain milling machine in which grinding grain milling rollers 5a are sequentially arranged. An air chamber 10 is located below the rotating disk 9 which is fixed to the vertical shaft 3 with a small gap 37 between the polishing tube 2a and the polishing tube 2a.
communicates with the exhaust passage 34 of the hollow main shaft 3 via the ventilation passage 33.

The lower end of the hollow main shaft 3 is closed and the upper end is opened to communicate with the atmosphere, and an exhaust valve 35 connected to an exhaust air volume adjustment device 36 is provided on the shaft.

Similarly, the air chamber 10 communicates with the grain milling chamber 6 and the exhaust port 32 through a minute gap 37 formed between the milling cylinder 2a and the rotating disk 10.

The operation of the above configuration will be explained. When the main electric motor 14 and the blower 12 are driven to supply grains to the grain feeding device 22, the grains are ground while being subjected to the grain lifting action by the spiral rotor 4 and the grain raising action accompanied by the stirring flow caused by the rising air from the air outlet. Sent to grain trochanter 5. The grains that have reached the grinding grain trochanter 5 are subjected to the grain polishing action by the grinding grain trochanter 5, as in the previous embodiment. In this embodiment, the spiral trochanter 4a is further
The same effect is applied again by the grinding grain trochanter 5a, and the milling ability is large. In this embodiment, since the air flow rate rising inside the grain milling chamber 6 is controlled by the exhaust air flow rate adjusting device 36 provided above the hollow main shaft 3, the air chamber 10
It has the function of discharging the dust that has fallen to the outside of the machine, and can also adjust the air volume inside the grain milling room 6.

〔Effect of the invention〕

According to the vertical grinding type grain milling machine of the present invention, a spiral rotor and a grinding grain trochanter are inserted into a vertical shaft rotatably provided in an upright milling cylinder, and In a vertical grinding type grain milling machine, the lower part of the grain milling room is connected to the grain supply part and the upper part is connected to the grain discharge part, the main part of which is a grain milling room. By connecting the air outlet to the air blower and providing an air outlet at the top of the grain milling chamber to blow air from the bottom to the top into the grain milling chamber, grains can be removed in grinding type grain milling machines that require coarse grain density. The pressure difference due to the gravity of the grains, that is, the density difference, is reduced as much as possible, and the density itself is reduced to promote agitation and flow of the grains, resulting in fine grinding of both grains and whole grains. The opportunity to contact the grain trochanter is equalized and the grain can be milled without spots. In addition, if air is blown from the air chamber provided at the bottom of the grain milling chamber toward the small gap between the milling tube and the rotating disk, in addition to the grain polishing effect, it will also accumulate at the bottom of the grain milling chamber and stick between the rotating and non-rotating parts. , bran and dust containing oil and the like that cause rotational resistance can be removed along with the wind. The agitation and flow state of the grains can be controlled by blowing air into the grain milling chamber in a swirling manner and adjusting the air volume. Furthermore, since the air chamber in the lower part of the grain milling chamber is communicated with the atmosphere through the hollow main shaft, there is a remarkable effect that dust and the like that enter the air chamber and accumulate over time can be discharged to the outside of the machine.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view of a grinding type grain milling machine embodying the present invention, Fig. 2 is a partially enlarged view of a grain milling room, and Fig. 3 is a vertical grinding type grain milling machine according to another embodiment. FIG. 3 is a partially cutaway side view. DESCRIPTION OF SYMBOLS 1... Vertical grinding type grain milling machine, 1a... Vertical grinding type grain milling machine, 2... Porous wall removing bran polishing cylinder, 2a... Refining cylinder, 3
... Vertical axis, 4... Spiral trochanter, 4a... Spiral trochanter,
5... Grinding grain trochanter, 5a... Grinding grain trochanter, 6.
... Grain milling room, 7... Grain supply section, 8... Grain discharge section, 9... Rotating disk, 10... Air chamber, 11... Ventilation port, 12... Ventilation Device, 13... Base, 14...
Main motor, 15... Main motor shaft, 16... Drive pulley, 17... Passive pulley, 18... Belt, 1
9...Motor stand, 20...Motor, 21...
- Drive pulley, 22... Grain feeding device, 22a...
- Grain supply device, 23... Conveyor shaft, 24... Passive pulley, 25... Belt, 26... Throttling precision adjustment device, 27... Resistance lid, 28... Discharge gutter, 29・・・
- Bran collection room, 30... Exhaust fan, 31... Bran exhaust pipe, 32
... Ventilation port, 33... Ventilation duct, 34... Ventilation duct,
35... Discharge valve, 36... Exhaust air volume adjustment device,
37...Small gap, 38...Swivel groove.

Claims (4)

[Claims] (1) A spiral trochanter and a grinding grain trochanter are inserted into a vertical shaft rotatably provided in an upright milling cylinder, and a grain milling room is constructed in which the milling cylinder and the grinding grain trochanter are the main parts. In a vertical grinding type grain milling machine, the lower part of which is connected to the grain supply section and the upper part of which is connected to the grain discharge section, an air outlet is provided at the lower part of the grain milling chamber, and the air outlet is connected to the air blower and is A vertical grinding type grain milling machine characterized by having an air exhaust port in the upper part of the grain chamber. (2) A spiral trochanter and a grinding grain trochanter are inserted into a vertical shaft rotatably installed in an upright milling cylinder, and the lower part of the grain milling room has the milling cylinder and the grinding grain trochanter as its main parts. In the vertical shaft grinding type grain milling machine, the bottom surface of the grain milling chamber is connected to the grain feeding part and the upper part is connected to the grain discharging part, and the bottom surface of the grain milling chamber is connected to the polishing tube with a slight gap between the vertical shaft or the spiral rotor. A vertical grinding type grain milling system, characterized in that it has a rotating disk fixedly attached to the rotating disk, an air chamber is formed below the rotating disk, the air chamber is connected to an air blower, and an air exhaust port is provided in the upper part of the grain milling chamber. Machine. (3) In the vertical grinding grain milling machine according to claim (2),
A vertical grinding type grain milling machine, characterized in that the rotating disk is provided with a turning groove that gives a swirl to air blowing into the grain milling room. (4) In the vertical shaft grinding type grain milling machine according to claims (2) and (3), the air chamber is connected to an air exhaust passage of the hollow vertical shaft whose lower end is closed and whose upper end is open. A vertical shaft grinding type grain milling machine characterized by having an air volume adjustment device installed above the air exhaust side of the vertical shaft.