JP2016107180A - Cyclone and rice polishing machine with cyclone - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cyclone which has a small size and a high separative power.SOLUTION: A hopper-like circular truncated cone 57 is joined to a lower part of a cylindrical body 56, and the interior of the cylindrical body 56 is provided with a partition 47 of which a midship part is provided with a through-hole 50 so as to vertically partition an interior space of the cylindrical body thereby forming an upper chamber 48 and a lower chamber 49. The other end of a clean air discharge pipe 54, of which one end is communicated with a suction fan, faces a side wall of the upper chamber 48, and a height of the side wall of the upper chamber 48 is made substantially same as a diameter of the clean air discharge pipe 54. One end of a dust-containing air supply pipe 53 faces a vertical side wall of the lower chamber 49, and a height of the vertical side wall of the lower chamber 49 is made substantially same as a diameter of the dust-containing air supply pipe 53. A height of the circular truncated cone 57 is less than a height of the cylindrical body 56, and a dust discharge port 55 is provided at a center of a lower part of the circular truncated cone 57.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a small cyclone having a high separation capacity and a rice mill equipped with the cyclone.

  Conventionally, a cyclone is known as a separation device for separating a powdered solid (dust etc.) mixed in a gas (see Patent Document 1).

  However, the cyclone described in Patent Document 1 has a problem that it is difficult to incorporate into a small rice mill, for example, because the height of the cyclone itself is large.

Japanese Utility Model Publication No. 62-42761

  In view of the above problems, the present invention provides a cyclone capable of obtaining separation performance equivalent to that of a conventional cyclone having a large height while suppressing the height of the cyclone, and a small rice mill incorporating the cyclone. And

In order to solve the above problems, the cyclone of the present invention is:
A hopper-shaped truncated cone is joined to the lower part of the cylindrical body, and a partition wall having a communication hole at the center is provided inside the cylindrical body so as to partition the internal space vertically, thereby providing an upper chamber and a lower chamber. Forming,
While the side wall of the upper chamber faces the other end of the clean air discharge pipe that communicates with the suction fan at one end, the height of the side wall of the upper chamber is substantially equal to the diameter of the clean air discharge pipe, The vertical side wall of the lower chamber faces one end of the dust-containing air supply pipe, and the height of the vertical side wall of the lower chamber is substantially equal to the diameter of the dust-containing air supply pipe.
Furthermore, the technical means of making the height of the truncated cone smaller than the height of the cylindrical body and providing the dust outlet at the lower center of the truncated cone was taken.

According to claim 2, the cyclone is incorporated into a rice mill.

According to a third aspect of the present invention, a hook receiving box is provided below the cyclone so as to be able to enter and exit.

According to a fourth aspect of the present invention, there is provided a bag receiving bag for collecting fine dust that could not be collected by the cyclone.

According to a fifth aspect of the present invention, the cyclone is made of a transparent material.

According to the cyclone of the present invention, a clean air discharge pipe is provided on the side wall of the upper chamber inside the cylindrical body, and the height of each side wall of the upper chamber and the lower chamber provided inside the cylindrical body is connected to each chamber. Since the diameter of each of the air discharge pipe and the dust-containing air supply pipe is almost the same, it can be made a compact cyclone with a reduced overall height, and the dust-containing air is supplied to the lower chamber and becomes dusty. And clean air, and dust is discharged from the dust discharge port provided in the lower part of the lower chamber, while clean air is discharged from the clean air discharge pipe through the upper chamber, so that the dust is reliably separated It is something that can be done.

Further, since the cyclone of the present invention has a compact shape with a small height, it can be incorporated into a rice mill, particularly a small rice mill, and the rice mill does not increase in size. Moreover, since clean air from which dust has been separated is sucked into the suction fan, dust does not adhere and accumulate, and the rice mill can be made sanitary.

In addition, by providing a trap box directly below the cyclone, the trap generated in the scouring section will be recovered immediately after being separated by the cyclone, so that the trap can be efficiently recovered without installing extra equipment. can do.

Further, by providing a soot receiving bag on the exhaust side of the suction fan, even if fine soot that cannot be recovered by the cyclone is included, it can be prevented from being released outside the apparatus.

Furthermore, since the cyclone is made of a transparent material, it becomes possible to monitor the state of separation and recovery of rice bran and the operation state of the rice mill.

It is a perspective view of the rice milling machine incorporating the cyclone of the present invention. It is a front view of the rice milling machine incorporating the cyclone of the present invention. It is a top view of the rice milling machine incorporating the cyclone of the present invention. It is a schematic longitudinal cross-sectional view which shows the internal structure of the rice milling machine incorporating the cyclone of this invention. It is an enlarged view of the cyclone in FIG. It is the perspective view which showed the flow of the air etc. in the cyclone of this invention.

  A mode for carrying out the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing the entire rice mill incorporating the cyclone of the present invention, FIG. 2 is a front view of the rice mill incorporating the cyclone of the present invention, and FIG. 3 is a rice mill incorporating the cyclone of the present invention. FIG. 4 is a schematic longitudinal sectional view taken along line AA showing the internal structure incorporating the cyclone of the present invention, FIG. 5 is an enlarged sectional view of the cyclone of the present invention, and FIG. It is the perspective view which showed the flow of the air etc. in the cyclone.

With reference to FIG. 5, the cyclone 7 which is the main part of the present invention will be described. The cyclone 7 is characterized in that the upper and lower two chambers 48 and 49 are constituted by a partition wall 47 that traverses the inside of the cyclone 7. In other words, the outer shape of the cyclone 7 is shaped such that a hopper-shaped inverted truncated cone 57 is joined to the lower portion of the longitudinal cylindrical body 56, and the partition 47 is formed so as to partition the internal space vertically. Is provided. A space above the partition wall 47 of the cyclone 7 is formed in the upper chamber 48, and a space below the partition wall 47 is formed in the lower chamber 49. A communication hole 50 for communicating the upper chamber 48 and the lower chamber 49 is formed at the center of the partition wall 47. By providing this communication hole 50, there is less possibility that the particles once separated will be re-wound into the vortex, and the classification function can be maintained even when the height of the cyclone 7 is low.
In addition, the lower chamber 49 is provided with an air inlet 51 on the side wall 49a, and a dust outlet 55 for discharging separated dust is provided on the lower bottom thereof. Furthermore, the upper chamber 48 communicating with the communication hole 50 is provided with a clean air outlet 52 through which clean air flows out on the side wall.

  As shown in FIG. 4, a rice milling machine 1 incorporating the cyclone of the present invention includes a milling unit 2 for milling brown rice, and a driving unit 3 in which a driving motor on one end side of the milling unit 2 is incorporated, A refined product discharge unit 4 in which a resistance plate 16 and a refined product discharge basket 17 on the other end side of the refined unit 2 are installed, a first kite collection box 30 that collects the purified product from the refined unit 2, and a refined product that collects purified products. In order to collect the table 5 on which the box 31 is mounted, the raw material supply unit 6 including the raw material supply hopper 32 and the raw material supply shutter 33, and the soot generated in the refinement unit 2, the first refinement unit 2 collects the first soot. The main part is composed of the cyclone 7 disposed in the path to the recovery box 30.

The finer section 2 includes a metal strip 10 that is formed of a cylindrical or polygonal perforated plate, a main shaft 11 that is rotatably disposed in the steel plate 10, and a shaft attached to the main shaft 11. Then, a whitening roll 12 for finely polishing, a whitening chamber 13 formed between the demetalization wire cylinder 10 and the whitening roll 12, and a feed roll for feeding the raw material from the raw material supply hopper 32 into the whitening chamber 13 12a and a removal chamber 15 formed between the removal wire cover 10 on the outer peripheral side of the removal wire mesh tube 10 and the fine product discharge side of the removal wire mesh tube 10. The resistor plate 16 presses the end face, and a refined product discharge rod 17 that allows the refined product that has flowed out against the resistor plate 16 to flow into the refined product collection box 31.

The drive unit 3 is provided with bearings 20 and 21 that rotatably support one end side of the main shaft 11 of the precision unit 2, and a drive pulley 22 that is attached to the end of the main shaft 11 is a belt (see FIG. A drive motor (not shown) is arranged so as to be rotationally driven via the not shown. As shown in FIG. 1, the rice mill 1 is provided with an operation unit 39 having a timer function, and the operation unit 39 and a driving motor are electrically connected. Thus, when the operator operates the operation unit 39, the driving motor is turned on / off by the operation of the timer function, so that the rice milling machine 1 is automatically started and stopped. Further, as shown in FIG. 4, a suction fan 23 for collecting soot is provided immediately below the drive pulley 22, and below that is for collecting fine dust that could not be collected by the cyclone 7. A second soot collection bag 34 is also provided. By connecting the second soot collection bag 34 to the discharge part of the suction fan 23, even if there is fine dust that could not be collected by the cyclone 7, these can be completely collected, Will not worsen.

The precision product discharge section 4 is provided with the resistance plate 16 and a precision product discharge bowl 17, and the precision product discharge bowl 17 is configured so that the purified product flowing out from the whitening chamber 13 is passed through the opening 31 a of the product collection box 31. While the inclination angle is designed so as to surely flow into the box, the height of the fine product collection box 31 is set close to the fine product discharge bowl 17 to be high. The resistance plate 16 is provided with a compression spring 41 for applying a pressing force via a moving shaft 40, and a dial 42 is provided in conjunction with the moving shaft 40, and the dial 42 is connected to an operator. Is operated, the pressing force of the resistance plate 16 can be arbitrarily adjusted. Reference numeral 43 (see FIGS. 1 and 4) is a cover body for opening the precision product discharge section 4, and the dial 42 can be operated when the cover body is removed.

The mounting table 5 (see FIG. 1 to FIG. 4) can be mounted with the first basket collection box 30 and the fine product collection box 31 arranged side by side. The first soot collection box 30 may be covered with a material having a high friction coefficient so as not to move due to vibration. Moreover, the fixed leg 44 and the wheel 45 for a movement are attached to the mounting base 5 bottom face, and the rice milling machine 1 can be easily moved to arbitrary places and the milling work can be performed by lifting the fixed leg 44 side.
As shown in FIGS. 1 and 2, the first basket collection box 30 is formed in a box-shaped container, and a patchon lock 46 is attached to the side wall thereof, and is attached to the lower part of the cyclone 7. The hook can be easily detached from the hook and leakage of the bag is prevented. The number of patchon locks 46 may be increased or decreased as necessary. The refined product collection box 31 is similarly formed in a box-shaped container, and its upper surface is opened to form an opening 31a.

The raw material supply unit 6 includes a raw material supply hopper 32 and a raw material supply shutter 33 that opens a charging port 32 a provided at the bottom of the raw material supply hopper 32. The raw material supply shutter 33 can increase or decrease the supply amount of the raw brown rice to the milled portion 2 depending on the degree of opening.

The dust removal chamber 15 of the finer section 2 and the lower chamber 49 of the cyclone 7 communicate with each other by a dust-containing air supply pipe 53, and the upper chamber 48 of the cyclone 7 and the suction port of the suction fan 23. 23a is communicated by a clean air discharge pipe 54. Furthermore, the discharge side of the suction fan 23 communicates with the second soot collection bag 34, and fine dust that cannot be collected by the cyclone 7 is collected. By providing the second soot collection bag 34, it is possible to more completely prevent soot from being discharged out of the machine.

The height of the side wall of the upper chamber 48 is substantially equal to the diameter of the clean air discharge pipe 54, while the height of the side wall of the lower chamber 49 is substantially equal to the diameter of the dust-containing air discharge pipe 53. Further, the height of the truncated cone 57 is preferably smaller than the height of the cylindrical body 56. Thereby, it is possible to collect dust equivalent to the conventional one while suppressing the height of the cyclone.

The operation in the above configuration will be described.

The raw brown rice introduced from the brown rice supply port is fed into the milling unit 2 by the action of the feed roll 12a. The raw brown rice fed into the milling section 2 is pressed into the demetallization cylinder 10 by a resistance plate 16 that presses the discharge port of the milling chamber 13, and the brown rice grains are rotated by the milling roll 12 that rotates in the milling chamber 13. Is stirred, the soot layer is removed and whitening is performed.
By adjusting the load of the resistance plate 16 by operating the dial 42 and changing the precision pressure, it is possible to set an arbitrary precision of the accuracy.
The polished white rice is discharged to the fine product discharge basket 17 against the resistance plate 16 and recovered into the fine product recovery box 31 by natural fall. On the other hand, the soot removed by scouring is leaked from the gap of the scavenging wire cylinder 10 into the scavenging chamber 15 and sent to the cyclone 7 through the dust-containing air supply pipe 53. Since the removal chamber 15 is sucked by the suction fan 23, the soot does not stay in the removal chamber 15 and is forcibly sucked into the cyclone 7 through the dust-containing air supply pipe 53.

As shown in FIGS. 5 and 6, the soot conveyed through the dust-containing air supply pipe 53 first flows into the lower chamber 49 from the air inlet 51 of the cyclone 7, and the dust is discharged by the centrifugal action of the lower chamber 49. It is discharged from the outlet 55 and is collected into the first soot collection box 30 disposed at the lower part of the cyclone 7. The first rice bran collection box 30 is arranged in the rice mill 1 and can collect the rice bran without leaking outside.
The air separated from the soot in the lower chamber 49 of the cyclone 7 is then exhausted to the second soot collection bag 34 through the communication hole 50 and through the upper chamber 48 and the suction fan 23. Here, even if there is dust or fine soot that could not be recovered by the cyclone 7, it is recovered in the second soot recovery box 34 through the suction fan 23. That is, since the second soot collection bag 34 is provided to collect dust and fine soot, soot is not discharged outside the apparatus, and only clean air is exhausted.

If the cyclone 7 is made of a transparent material, the operator can see the process of collecting rice bran and can check the state of milled rice (cut rice).

By providing the cyclone 7 between the scouring part 2 and the suction fan 23, soot generated in the scouring part 2 is separated into soot and air by the cyclone 7, thus preventing the soot from adhering to the inside of the suction fan 23. be able to. As a result, an extra load is not applied to the suction fan 23, and a constant suction force can always be maintained.

  The cyclone of the present invention can be reduced in size and is extremely useful for removing rice mills and the like.

DESCRIPTION OF SYMBOLS 1 Rice mill 2 Milling part 3 Drive part 4 Refined product discharge part 5 Placement table 5a Placement surface 6 Raw material supply part 7 Cyclone 10 Stripping wire mesh cylinder 11 Spindle 12 Milling roll 12a Feeding roll 13 Polishing room 14 Chamber 16 Resistance plate 17 Fine product discharge rod 20 Bearing 21 Bearing 22 Drive pulley 23 Suction fan 23a Suction port 30 First rod recovery box 31 Refinement recovery box 31a Opening portion 32 Raw material supply hopper 32a Input port 33 Raw material supply shutter 34 Second rod recovery Bag 39 Operation unit 40 Moving shaft 41 Compression spring 42 Dial 43 Cover body 44 Fixed leg 45 Moving wheel 46 Patchon lock 47 Partition 48 Upper chamber 49 Lower chamber 49a Side wall 50 Communication hole 51 Air inlet 52 Clean air outlet 53 Dust Air supply pipe 54 Clean air discharge pipe 55 Dust discharge port 56 Cylindrical body 57 Frustum

Claims (5)

A hopper-shaped truncated cone is joined to the lower part of the cylindrical body, and a partition wall having a communication hole at the center is provided inside the cylindrical body so as to partition the internal space vertically, thereby providing an upper chamber and a lower chamber. Forming,
While the side wall of the upper chamber faces the other end of the clean air discharge pipe that communicates with the suction fan at one end, the height of the side wall of the upper chamber is substantially equal to the diameter of the clean air discharge pipe, The vertical side wall of the lower chamber faces one end of the dust-containing air supply pipe, and the height of the vertical side wall of the lower chamber is substantially equal to the diameter of the dust-containing air supply pipe.
Furthermore, the height of the truncated cone is made smaller than the height of the cylindrical body, and a dust discharge port is provided at the lower center of the truncated cone. A milling machine comprising a milling unit for milling brown rice and a suction fan for sucking and conveying rice bran generated in the milling unit, wherein the other end of the dust-containing air supply pipe of the cyclone is connected to the other end of the cyclone. A rice milling machine that is in contact with the dehulling room that surrounds the milling section. The rice milling machine according to claim 2, wherein a paddle box is provided below the dust outlet of the cyclone so as to be able to enter and exit. The rice milling machine according to claim 2 or 3, wherein a paddle bag for collecting fine dust is provided on the exhaust side of the suction fan. The rice mill according to any one of claims 2 to 4, wherein the cyclone is made of a transparent material.

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