JP2018150091A - Grain separation unit and grain air transportation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solution to the problem that conventionally with grain separation unit, it has been difficult to achieve at the same time removal of powdery matters and maintainability of the unit.SOLUTION: The grain separation unit is structured as such that the end part of the transporting cylinder 1 which transports the grain T fed into the stakeout hopper 10 to the storage tank 11 by the suck-transporting wind from blowing unit 2 is connected on the upper side of the in-taking part 15 formed in a cylindrical shape sealed by a nonporous plate that decelerates the transporting wind taken in from the transporting cylinder 1, a funnel-shaped separation exhaust part 17 is provided that becomes thinner as it goes down the lower part of a rotary valve 18 which, provided at the lower part of the in-taking part 15, supplies the grain T to the storage tank 11 in the lower part, and the separation exhaust part 17, by way of an opening hole 26 formed on a part or the whole of the separation exhaust part 17, a lower outer case 32 hermetically enclosing the periphery of the separation exhaust part 17, and a suction chamber 27 formed between the periphery of the separation exhaust part 17 and inner circumference of the case 32, discharges transportation wind from the suction chamber 27 while separating the transfer air and the grain T inside the separation exhaust part 17.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a grain separation device that separates grains from a conveying wind and a grain air conveyance method that conveys grains such as rice and wheat.

Conventionally, grains of rice wheat are refined by a rice mill (milling machine) to remove the surface powdery components, but even once refined grains, the grains rub against each other during transportation. Thus, the powder on the surface is scraped off to form a free powder.
An apparatus for removing the powdery material including the free powdery material is known as a polishing apparatus (see Patent Document 1).
Further, conventionally, the object to be conveyed is conveyed by the high-pressure air of the blower, the object to be conveyed is blown together with the conveying air in a cylindrical cyclone, and the object to be conveyed and the conveying air are reduced in pressure by making the conveying air vortex in the cyclone. A method for separating the two is known (Patent Document 2).
In addition, conventionally, the object to be conveyed is conveyed with high-pressure air from a blower, and a cylindrical cyclone-shaped intake part and a funnel-shaped funnel part below the intake part are provided, and an opening hole is provided in the intake part and the funnel part, A configuration in which a suction chamber is provided around the opening hole is known as a prior application by the same applicant and is known (Patent Document 3).

JP 2007-125538 A JP 2004-182372 A Japanese Patent No. 5174852

Of the known examples, the one of JP-A-2007-125538 is once supplied with the grain that has been subjected to the whitening treatment, again in the pulverized product cylinder of the rice polishing apparatus, and polished with a rice polishing roll. There is a problem that a drive mechanism is required, the entire equipment becomes large, and equipment costs increase.
That is, if the powdery substances adhering to the grains are not removed, the powdery substances will accumulate in the tank and the conveying device, and maintenance will be difficult. However, there is currently no apparatus for removing powdery substances adhering to the grain other than the rice polishing apparatus.
Moreover, since the thing of Unexamined-Japanese-Patent No. 2004-182372 is a cyclone which isolate | separates a grain from a conveyance wind among the said well-known examples, there exists a subject that the powdery substance adhering to a grain cannot be removed.
In other words, the cyclone of the known example is originally intended to attenuate the conveying wind, and the grain does not slide on the inner periphery of the cyclone, so that the powder on the grain surface adheres to the grain. It is conveyed to the next process as it is.
And the powdery material generated by the contact between the grains accumulates in the cyclone and becomes an adhering powdery material, and the powdery material is carried to the cyclone exhausting process and the blower, etc., and adversely affects these maintenance. It is not easy.
Also, among the known examples, the one disclosed in Japanese Patent No. 5174852 has a suction chamber around the intake part and the funnel part, so the problem of removing the powdery material on the grain surface is overcome, but the fuselage Since the suction chamber is exhausted by the exhaust cylinder provided at the top, there is a problem that the separated powdery substance remains in the suction chamber.
The present application devises the process of removing the powdery material, makes it possible to remove the powdery material from the grain being conveyed and prevent the powdery material from remaining, and facilitates maintenance.

According to the first aspect of the present invention, the conveying wind obtained from the conveying cylinder 1 at the end of the conveying cylinder 1 that conveys the grain T put into the tension hopper 10 to the storage tank 11 by the suction conveying air of the blower 2 is used. A rotary valve 18 for connecting the grain T to the storage tank 11 is provided below the intake portion 15 and connected to the upper side portion of the intake portion 15 formed in a cylindrical shape sealed by a non-perforated plate that decelerates. A separation funnel-shaped separation exhaust portion 17 that becomes thinner as it goes downward is provided. The separation exhaust portion 17 seals the periphery of the separation exhaust portion 17 with an opening 26 formed in a part or all of the separation exhaust portion 17. The lower outer case 32 that surrounds and the suction chamber 27 formed between the outer periphery of the separation exhaust part 17 and the inner periphery of the lower outer case 32 separates the conveying wind and the grain T in the separation exhaust part 17. While conveying air from the suction chamber 27 It is obtained by the structure and the grain separation device that.
According to a second aspect of the present invention, the suction chamber 27 sucks and exhausts the conveying air in the separation exhaust portion 17 from both the upper and lower sides of the suction chamber 27, and a plurality of upper exhaust branch pipes 40 are disposed above the suction chamber 27. One end of a plurality of lower exhaust branch pipes 43 is connected to the lower side of the suction chamber 27, and an upper outer case 19 surrounding the intake portion 15 is provided above the lower outer case 32, A plurality of upper exhaust branch pipes 40 are arranged in a space between the inner periphery of the upper outer case 19 and the outer periphery of the intake part 15, and the lower part of the upper exhaust branch pipe 40 is connected to the upper part of the sealed suction chamber 27, One end of a plurality of lower exhaust branch pipes 43 is connected to the lower portion of the sealed suction chamber 27, and the plurality of upper exhaust branch pipes 40 and the lower exhaust branch pipes 43 are spaced apart from each other at a predetermined interval in the circumferential direction. Each is connected to the suction chamber 27, and the lower part of the intake part 15 is the intake 15 is attached to a partition plate 29 provided at the lower part of the upper outer case 19 surrounding the periphery of the upper part 15, and the separation exhaust part 17 is attached to an upper funnel part 30 attached to the partition plate 29 and a lower part attached to the lower part of the upper funnel part 30. The upper funnel portion 31 is divided into upper and lower portions, and at least the opening 26 is formed in the lower funnel portion 31 and the lower outer case 32 side provided below the upper funnel portion 30 and the upper outer case 19 And an opening 45 closed by a removable inspection lid 46 is provided at a predetermined position of the lower outer case 32 surrounding the separation exhaust part 17. Is a grain separation device formed so that the removed lower funnel portion 31 can be taken in and out.
The invention of claim 3 is a grain separation device in which the suction chamber 27 is configured to suck and exhaust the conveying air in the separation exhaust portion 17 from both the upper and lower sides of the suction chamber 27.
In the invention of claim 4, grains having one end of a plurality of upper exhaust branch pipes 40 connected to the upper side of the suction chamber 27 and one end of a plurality of lower exhaust branch pipes 43 connected to the lower side of the suction chamber 27. This is a grain separator.
According to the invention of claim 5, an upper outer case 19 surrounding the intake portion 15 is provided above the lower outer case 32, and a plurality of spaces are formed in the space between the inner periphery of the upper outer case 19 and the outer periphery of the intake portion 15. The upper exhaust branch pipe 40 is disposed, the lower part of the upper exhaust branch pipe 40 is connected to the upper part of the sealed suction chamber 27, and one end of a plurality of lower exhaust branch pipes 43 is connected to the lower part of the sealed suction chamber 27. A connected grain separator.
The invention of claim 6 is a grain separation device in which the plurality of upper exhaust branch pipes 40 and the lower exhaust branch pipes 43 are connected to the suction chamber 27 at predetermined intervals in the circumferential direction.
The lower portion of the intake portion 15 is attached to a partition plate 29 provided at a lower portion of the upper outer case 19 surrounding the intake portion 15, and the separation exhaust portion 17 is attached to the partition plate 29. The upper funnel portion 30 and the lower funnel portion 31 attached to the lower portion of the upper funnel portion 30 are divided into upper and lower portions, and at least the opening portion 26 is formed in the lower funnel portion 31 and the upper funnel portion is formed. 30 and a grain separation device configured to be detachable with respect to each of the lower outer case 32 side provided below the upper outer case 19.
According to the eighth aspect of the present invention, an opening 45 closed by a removable inspection lid 46 is provided at a predetermined position of the lower outer case 32 surrounding the separation exhaust part 17, and the opening 45 is removed from the lower side. The funnel portion 31 is a grain separation device formed in a size that allows it to be taken in and out.
According to the ninth aspect of the present invention, the lower outer case 32 is formed in the lower outer case 32 so as to face the large opening 45A having a size that allows the removed lower funnel portion 31 to be taken in and out of the lower outer case 32 than the large opening 45A. The grain separator is formed with a small small opening 45B.
In the tenth aspect of the present invention, the grain T is introduced into the tension hopper 10 connected to the starting end of the conveying cylinder 1 that is sucked from the air intake portion of the blower 2 and through which the suction air flows, and the inputted grain T is conveyed. Air is conveyed to the intake section 15 of the grain separation device 12 by the suction air in the cylinder 1, and the intake section 15 decelerates the conveyance wind as a vortex, and is provided below the intake section 15 and becomes thinner as it goes downward. The grain T is dropped while being in sliding contact with the inner periphery of the separation exhaust part 17 to be collected in the storage tank 11 while removing the powdery substance F on the surface of the grain T. From the opening hole 26 provided in the separation exhaust part 17 The powdery substance F is dropped to select the powdery substance F and the grain T, and the conveying air entering the separation exhaust part 17 is sucked into the suction chamber 27 provided around the separation exhaust part 17 from the opening hole 26. The powder that has been evacuated to separate the grain T and the conveying wind and entered the suction chamber 27 through the opening 26 Grain air is collected by separating the powder F and the conveying air by conveying the substance F to the powder separating apparatus 50 provided in the middle of the conveying cylinder 1 by the conveying cylinder 1 connected to the suction chamber 27. This is a transport method.

In the first aspect of the invention, since the conveying air is exhausted from the suction chamber 27 provided only around the separation exhaust part 17, the removal efficiency of the powdery substance F can be improved.
In the invention of claim 2, since the conveying air in the separation exhaust part 17 is sucked and exhausted from the upper and lower sides of the suction chamber 27, the removal efficiency of the powdery substance F can be improved and the residual of the powdery substance F can be prevented. In addition, since a plurality of upper exhaust branch pipes 40 are connected to the upper side of the suction chamber 27 and a plurality of lower exhaust branch pipes 43 are connected to the lower side of the suction chamber 27, suction exhaust from both the upper and lower sides of the suction chamber 27 is performed. The structure can be easily configured, and a plurality of upper exhaust branch pipes 40 are arranged in a space between the inner periphery of the upper outer case 19 surrounding the intake portion 15 and the outer periphery of the intake portion 15. Since the plurality of upper exhaust branch pipes 40 and the lower exhaust branch pipes 43 are arranged in the circumferential direction, the suction efficiency of the suction chamber 27 is improved and the powdery substance F is removed. Improves efficiency and prevents powder F from remaining, and separate exhaust 17 is divided into the upper funnel portion 30, the lower funnel portion 31, and the lower tubular portion 33, and the opening 26 is formed in the lower funnel portion 31, so that the most maintenance such as clogging removal is required. Only the lower funnel portion 31 to be removed can be removed, maintenance can be facilitated, and the opening 45 is provided in the lower outer case 32, so that the inspection lid 46 is removed and the periphery of the separation exhaust portion 17 is removed. Can be opened, maintenance can be facilitated, and since the lower funnel portion 31 disassembled from the opening 45 can be taken in and out, the maintenance can be further facilitated.
In the invention of claim 3, since the conveying air in the separation exhaust part 17 is sucked and exhausted from the upper and lower sides of the suction chamber 27, the removal efficiency of the powdery substance F can be improved and the residual of the powdery substance F can be prevented. .
In the invention of claim 4, a plurality of upper exhaust branch pipes 40 are connected to the upper side of the suction chamber 27 and a plurality of lower exhaust branch pipes 43 are connected to the lower side of the suction chamber 27. It is possible to easily configure the suction / exhaust configuration from
In the invention of claim 5, since the plurality of upper exhaust branch pipes 40 are arranged in the space between the inner periphery of the upper outer case 19 surrounding the intake portion 15 and the outer periphery of the intake portion 15, the airframe is made compact. Can be configured.
In the invention of claim 6, since the plurality of upper exhaust branch pipes 40 and lower exhaust branch pipes 43 are arranged in the circumferential direction, the suction efficiency of the suction chamber 27 is improved and the powdery substance F is removed. Efficiency can be improved and the residue of the powdery substance F can be prevented.
In the invention of claim 7, the separation exhaust part 17 is divided and formed by the upper funnel part 30, the lower funnel part 31 and the lower cylindrical part 33, and the opening hole 26 is formed in the lower funnel part 31. Only the lower funnel portion 31 requiring the most maintenance such as clogging removal can be removed, and the maintenance can be facilitated.
In the invention of claim 8, since the opening portion 45 is provided in the lower outer case 32, the inspection cover 46 can be removed to open the periphery of the separation exhaust portion 17, and maintenance can be facilitated. Since the lower funnel portion 31 disassembled from the opening 45 can be taken in and out, the maintenance can be further facilitated.
In the invention of claim 9, since the small small opening 45B is provided so as to face the large opening 45A in which the lower funnel portion 31 of the lower outer case 32 can be taken in and out, the side facing the large opening 45A is provided. The periphery of the separation exhaust part 17 can be opened by the opening 45B, and maintenance can be facilitated.
In the invention of claim 10, since the conveying wind and the grain T are separated by the separation exhaust part 17, and flow down on the opening hole 26 of the separation exhaust part 17 and sucked by the suction chamber 27, the grain T and the powdery substance F can be selected, and the selected powdery substance F can be collected by the powdery substance separating device 22, which improves the removal efficiency of the powdery substance F in the separation exhaust part 17 and is in the form of a powdery substance. Residue of the product F can be prevented, a dedicated device for removing the powdered material F is not required, and the processing cost for waste rice can be reduced, and it is a normal rice milling facility. Moreover, since the powdery substance F adhering during conveyance is removed, it can suppress that the powdery substance F accumulates in the conveyance cylinder 1, the storage tank 11, etc., and can reduce maintenance work and maintenance work frequency.

Schematic arrangement diagram of an example of a transport device. The longitudinal cross-sectional view of a grain separator (powder removal part). The same side view. The front view. The bottom view. The cross-sectional view of the intake part of a grain separator. The partial vertical side view of a powdery substance removal part, and the cross-sectional view of an opening hole part. The exploded front view of an upper funnel part and a lower funnel part. The front view of a lower funnel part. The front view of a lower side cylinder part.

An embodiment of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a conveyance cylinder that constitutes a conveyance path of a conveyance device H that conveys grains T such as rice wheat and feed, and the conveyance device H includes One blower 2 is provided.
The air blower 2 is a well-known device, and is configured to rotate a fan (not shown) so as to be sucked from one side of the air blower 2 and exhausted to the other. One end of the transport cylinder 1 is connected to the intake section 3 of the blower 2 to form a suction transport air path. Reference numeral 5 denotes an exhaust part of the blower 2, which exhausts from the exhaust part 5.
The lower end of the stuffing hopper 10 is connected to the start end side of the transport cylinder 1.
Since the suction conveyance wind sucked by the blower 2 is lower in temperature than the high-pressure exhaust wind compressed by the blower 2 and exhausted from the exhaust unit 5, Suppressing or preventing the rise to prevent the grain T from being altered.

A storage tank 11 for storing the grain T is provided between the blower 2 and the stuffing hopper 10. On the upper side of the storage tank 11, a grain separation device 12 that separates the grain T from a conveying wind that conveys the grain T is provided.
As shown in FIG. 2, the grain separation device 12 includes an intake unit 15 that takes in and attenuates (decelerates) the conveyance air from the conveyance cylinder 1, and a grain T and a conveyance air provided below the intake unit 15. And a separation exhaust unit 17 that exhausts the conveying air while separating the air.
The separation exhaust part 17 is formed in a funnel shape that becomes thinner as it goes downward, and a rotary valve 18 that supplies grains to the storage tank 11 is provided below the separation exhaust part 17.

The intake portion 15 is provided in the upper outer case 19 of the grain separation device 12, and the intake portion 15 is formed in a cylindrical shape in a plan view by a non-perforated plate, and the transfer cylinder 1 is positioned at a position tangential to the intake portion 15. A supply-side connection nozzle 21 that connects the supply-side transport cylinder 20 is connected.
That is, the intake part 15 decelerates the conveyance wind and the grain T taken in by the so-called cyclone principle.
In this case, the inner diameter of the intake portion 15 and the wind force of the conveying wind blown from the supply-side connection nozzle 21 are relatively set so that the grain T does not abut on the inner peripheral surface of the intake portion 15 and cracks occur. Set.

That is, if the intake portion 15 has a small inner diameter with respect to the conveyance air entering from the supply side connection nozzle 21, the intake portion 15 is not sufficiently attenuated (decelerated) and the grain T is formed on the inner surface of the intake portion 15. Since it hits and is damaged, the conveying wind entering from the supply side connection nozzle 21 is vortexed and attenuated (decelerated), thereby setting the grain T to be pushed down by its own weight.
A cylindrical guide body 22 having a predetermined diameter and a longitudinal axis is provided at the center of the intake portion 15. The guide body 22 guides the flow direction of the conveyance air so that the conveyance air flowing into the intake portion 15 becomes a vortex.
The grain separator 12 includes not only the powdery substance F released from the surface of the grain T during the conveyance of the grain T, but also the powder before release called cocoon or bran when released from the surface of the grain T. A powdery substance removing unit 25 for removing the powdery substance F is also provided.

In this case, the powdery substance removing unit 25 is not like a dedicated polishing (polishing) device for polishing the surface by applying a predetermined pressure to the grains T as in the past and rubbing them. It is provided in the grain separator 12 used as a part of the grain air transport device H.
Therefore, the powdery substance removing unit 25 removes the powdery substance F such as straw or bran on the surface of the grain T when separating the grain T and the conveying wind (FIG. 6).
Therefore, although it can be used even if it is the air conveyance apparatus H of the normal grain T, if the grain separation apparatus 12 is installed in the conveyance path | route of the grain T once refined, the surface of the grain T in conveyance It is possible to remove the powdered material F such as rice bran or bran.
In particular, when used for transporting waste rice or the like used as a raw material for feed or confectionery, a dedicated powdery material removing unit is not required, equipment investment can be reduced, and the installation effect is high.

The powdery substance removing unit 25 is configured by forming a suction chamber 27 around the separation exhaust unit 17 in which many opening holes 26 through which the grain T does not pass are formed.
That is, the conveying air that has entered the intake section 15 is exhausted from the opening 26 of the separation exhaust section 17 only through the suction chamber 27, and the grains blown into the separation exhaust section 17 together with the conveyance air. The powder adhering to the grain T when the T slides and the grain T flows down while contacting the inner peripheral surface of the separation exhaust part 17 when the conveying air is exhausted from the opening hole 26. The powdery substance removing unit 25 is configured such that the surface of the powdery substance F and the grain T is removed by rubbing, and the removed powdery substance F is sucked out by the suction chamber 27 as exhaust air.

The opening 26 has a mesh structure through which the grain T does not pass but the powder F passes (FIG. 6). For example, a mesh (mesh) formed by various processing methods such as plain weave and twill weave The opening hole 26 may be formed of a perforated plate such as punching metal, and the direction of the opening hole 26 may be either vertical or horizontal, but the peripheral edge of the opening hole 26 is a sharp corner portion 28 called a so-called edge ( 6) When the grain T flows down, the shaving action / effect of the adhered powdery substance F on the grain T and the passing amount of the powdery substance F when the conveying air escapes are improved, and the removal / selection / separation is achieved. The efficiency is preferable.
In order to facilitate understanding, in FIG. 2, the size of the opening hole 26 is larger than the actual size.

Further, when the grain T flows down on the inner peripheral surface of the separation exhaust part 17, the centrifugal force of the vortex of the conveying wind in the separation exhaust part 17 is applied in the discharge direction of the powdery substance F from the opening hole 26. And the sorting effect of the powdery substance F can be improved.
The separation exhaust part 17 detachably attaches the upper part of the upper funnel part 30 of the separation exhaust part 17 to the lower surface side of the lower partition plate 29 of the upper outer case 19 of the grain separation device 12 provided with the intake part 15.
A lower funnel portion 31 is detachably attached below the upper funnel portion 30, and a lower portion of the lower funnel portion 31 is detachably attached to a lower cylindrical portion 33 detachably attached to the lower outer case 32 or the rotary valve 18. The opening 26 is formed in the lower funnel portion 31.

Therefore, the separation exhaust part 17 of the present embodiment includes the upper funnel part 30, a lower funnel part 31 detachably attached to the upper funnel part 30, and a lower side detachably attached to the lower funnel part 31. The lower funnel portion 31 formed of the cylindrical portion 33 and formed with the opening 26 is configured to be removable from the lower outer case 32 to facilitate maintenance.
The opening hole 26 may be provided at least in a part of the separation exhaust part 17. Although the opening hole 26 is provided in the lower funnel part 31 in FIG. 2, the opening hole 26 is provided in the upper funnel part 30 in FIG. 7. The opening 26 may be provided in the entire separation exhaust part 17.

Reference numeral 35 denotes an engagement protrusion provided in the upper funnel portion 30, and 36 denotes an engagement groove provided in the lower funnel portion 31. The engagement groove 36 of the lower funnel portion 31 is engaged with the engagement protrusion 35 and attached. .
37 is an engagement protrusion provided in the lower funnel portion 31, 38 is an engagement groove provided in the lower tube portion 33, and an engagement groove of the lower tube portion 33 is formed in the engagement protrusion 37 of the lower funnel portion 31. 38 is engaged and attached. Reference numeral 38 </ b> A denotes a lower engagement groove provided in the lower cylinder portion 33, which is engaged with an engagement protrusion (not shown) provided in the lower outer case 32.

The suction chamber 27 is formed between the outer periphery of the separation exhaust part 17 and the inner peripheral surface of the lower outer case 32 of the grain separation device 12. The suction chamber 27 is enclosed and formed by the lower surface of the partition plate 29, the upper surface of the rotary valve 18, and the inner peripheral surface of the lower outer case 32, and suction is performed from both the upper and lower sides of the suction chamber 27.
Therefore, the sorting and discharging efficiency of the powdery substance F can be increased, and the residual of the powdery substance F in the suction chamber 27 and the separation exhaust part 17 can be suppressed, and maintenance can be facilitated.

The upper part of the upper exhaust branch pipe 40 is connected to the upper partition plate 29 of the suction chamber 27, and the upper part of each upper exhaust branch pipe 40 is one end of an exhaust side connection nozzle 41 provided on the upper part of the upper outer case 19. The other end of the exhaust side connection nozzle 41 is connected to the exhaust side transport cylinder 42 (FIGS. 2 and 5).
One end of a plurality of lower exhaust branch pipes 43 is connected to the lower outer case 32 above the rotary valve 18 below the suction chamber 27 (FIGS. 2 to 4). The ends are collectively connected to one end side of the intermediate exhaust pipe 44, and the other end of the intermediate exhaust pipe 44 is connected to the intermediate portion of the exhaust-side transfer cylinder 42 (FIG. 1).

Further, as described above, the intake portion 15 is formed of a non-perforated plate, and is configured so that the conveying air does not leak from the intake portion 15, thereby enhancing the suction effect in the separation exhaust portion 17 by the suction chamber 27. .
Moreover, the separation exhaust part 17 is formed so as to have an inclination angle at which the grain T flows down while sliding on the inner peripheral surface of the separation exhaust part 17, and the effect of sorting and discharging the powdery substance F from the opening hole 26 is achieved. It is increasing.
An opening 45 is provided at a predetermined position of the lower outer case 32, and an inspection lid 46 is provided in the opening 45 (FIGS. 3 and 4).

The opening 45 at a predetermined position is approximately half the size of the entire circumference of the lower outer case 32 when viewed from the bottom, and is large enough to take out the lower funnel portion 31 removed from the upper funnel portion 30 of the separation exhaust portion 17 to the outside of the machine. The large opening 45A is formed as shown in FIG.
Therefore, by removing the inspection lid 46, not only can the lower funnel portion 31 be exposed from the large opening 45A but the lower funnel portion 31 is exposed, the lower funnel portion 31 can be removed from the lower outer case 32. Maintenance work is possible.
Further, a small opening 45B is provided in the lower outer case 32 at a portion facing the large opening 45A.

Therefore, the maintenance of the part of the separation exhaust part 17 on the opposite side that cannot be exposed even if the inspection cover 46 of the large opening 45A is removed can be performed by removing the inspection cover 46 and opening the small opening 45B. It makes work easier.
46A is a large inspection lid that closes the large opening 45A, and 46B is a small inspection lid that closes the small opening 45B.
Further, an opening 45 is provided at a predetermined position of the upper outer case 19, and a so-called double door inspection lid 46 is provided in each opening 45 so as to be freely opened and closed.
A handle 48 is provided on the inspection lid 46.

The exhaust side transport cylinder 42 connected to the upper exhaust branch pipe 40 and the lower exhaust branch pipe 43 transports the powdery substance F separated and transported by the grain separator 12 (powder removal part 25). A powder separation device (dust cyclone) 50 for separating from the wind is provided (FIG. 1).
The configuration of the powder separation device 50 is arbitrary, and the discharge portion of the powder separation device 50 is connected to the middle part of the exhaust pipe 51 connected to the exhaust port of the blower 2, and the powder separation device 50. The powdery substance F separated in step 1 is conveyed to the powdery substance recovery unit 52 by the exhaust pipe 51.

(Operation of the embodiment)
The present invention has the above-described configuration. The tension shutter (not shown) of the tension hopper 10 is closed and the grain T is tensioned to the tension hopper 10, and then the air passage opening / closing valve is closed to energize the blower 2 Then, when the air passage opening / closing valve is opened after energization of the blower 2, the air in the transport cylinder 1 is sucked by the blower 2, whereby the suction chamber 27 of the grain separator 12 becomes negative pressure, The suction chamber 27 creates a negative pressure in the intake portion 15 and the separation exhaust portion 17 through the opening hole 26 of the separation exhaust portion 17, and the grain T in the tension hopper 10 is sucked into the conveyance cylinder 1 and is contained in the conveyance cylinder 1. To the supply-side connection nozzle 21 via the supply-side transport cylinder 20 by the suction air flowing through the supply air.

Since the supply-side connection nozzle 21 is connected to the intake portion 15 of the grain separation device 12 and the supply-side connection nozzle 21 opens in the tangential direction of the intake portion 15, the grain T is conveyed from the supply-side connection nozzle 21 to the conveying wind. At the same time, the air blown into the intake portion 15 is vortexed in the intake portion 15 and depressurized (decelerated).
The conveying air passes through the suction chamber 27 from the opening hole 26 of the separation exhaust part 17 and is exhausted to the exhaust side conveying cylinder 42 through the upper exhaust branch pipe 40 and the lower exhaust branch pipe 43, and the grain T is separated downward. It falls into the exhaust part 17 and flows into the rotary valve 18 from the separation exhaust part 17, and the conveying wind and the grain T are separated.

  Thus, the grain separation device 12 is provided with a powdery substance removing unit 25 for removing the powdery substance F generated by cutting the surface of the grain T such as rice bran or bran. Since it is provided in the grain separation device 12 used as a part of the grain air conveying device H, it is not like a conventional rice polishing device for polishing the surface of the grain T. When the apparatus 12 separates the grain T and the conveying wind, the powdery substance removing unit 25 causes not only the powdery substance F released from the surface of the grain T but also the rice cake or The surface layer (powder F) that becomes bran is also removed.

Therefore, although it can be used even with the normal air conveying device H of the grain T, once it is used for conveying the grain T that has been refined, the surface layer such as straw or bran of the surface of the grain T being conveyed It is possible to remove foodstuffs, especially when used to transport waste rice and other raw materials for feeds and confectionery, it is possible to remove the powdery material F generated during transportation, eliminating the need for a dedicated powdery material removal unit. The investment can be reduced and the installation effect is high.
Since the powdery substance removing unit 25 has a large number of opening holes 26 through which the grain T does not pass in a part of the separation exhaust part 17, the powdery substance removal part 25 is transported in the separation exhaust part 17. When the grains T in the vortex of the vortex collide with each other and the grain T due to the vortex-carrying wind positively contacts the opening hole 26, the sliding effect on the surface of the grain T is enhanced and the grain T adheres to the surface of the grain T. The powdered product F is scraped off, and the powdered product F is separated and removed from the grain T.

That is, the grain T falling to the separation exhaust part 17 from the intake part 15 flows down while slidably contacting the inner peripheral surface of the separation exhaust part 17 by a vortex-conveying wind, and the surface of the grain T is caused by the resistance when sliding. The deposits are removed.
Further, the separation exhaust part 17 is formed in a funnel shape that becomes thinner as it goes downward, and the opening 26 is formed in the separation exhaust part 17, so that when the internal exhaust surface (inclined surface) of the separation exhaust part 17 flows down The particle size selection is performed to discharge (fall) the powdered material F smaller (fine) than the grain T from the opening hole 26, and the removal efficiency of the powdered material F is improved.

In this case, when the peripheral edge of the opening hole 26 is a sharp corner portion 28 called a so-called edge, when the grain T collides, the cutting action / effect of the adhered powdery substance F of the grain T can be improved, The removal / separation efficiency is improved, which is preferable.
In addition, since the separation exhaust part 17 is formed in a funnel shape having a smaller diameter as it goes downward, the pressure when it comes into sliding contact with the inner peripheral surface of the separation exhaust part 17 in a spiral is increased. The contact time can be lengthened and the removal efficiency of the powdery substance F is improved.
Since the powdery substance removing unit 25 is configured by forming a suction chamber 27 around the separation exhaust unit 17, a free powdery substance F (rice cake or bran) that is released from the grain T in the conveying wind. In addition, the grain T surface layer (rice cake or bran) generated during the conveyance is discharged through the suction chamber 27 from the opening hole 26 of the separation exhaust part 17 of the powdery substance removal unit 25 together with the conveyance wind.

In this case, since the intake portion 15 is formed of a non-perforated plate and the intake portion 15 is not provided with an exhaust port, the conveying air that has entered the intake portion 15 is exhausted to the suction chamber 27 only from the opening hole 26.
Accordingly, the suction force in the suction chamber 27 can be improved, and the powdery substance F discharged from the opening hole 26 can be sucked into the suction chamber 27, and the particle size sorting efficiency can be improved to remove (recover) the powdery substance F.・ Discharge) Improve efficiency.
Further, the centrifugal force of the vortex of the conveying wind in the separation exhaust unit 17 and the suction force in the suction chamber 27 act on the grain T that moves downward while being in sliding contact with the inner periphery of the separation exhaust unit 17. In addition, the grain T is sucked during the movement so as to be pressed outward on the inner periphery of the separation exhaust part 17, thereby promoting the removal of the deposits on the surface of the grain T and the discharge of the powdery substance F.

Therefore, the grain T entering the separation exhaust part 17 from the intake part 15 includes the weight of the grain T, the vortex wind (centrifugal force) of the conveying wind, and the separation exhaust part 17 and the surroundings of the separation exhaust part 17. The suction force that blows through the suction chamber 27 acts, and the removal (selection) of the powdery substance F can be performed satisfactorily.
In addition, since the powdery substance removing unit 25 sucks the conveyance air sideways from the suction chamber 27 on the outer periphery of the separation exhaust unit 17 and raises a part of the exhaust in the suction chamber 27 outside the separation exhaust unit 17, Unlike the conventional cyclone, no upward vortex flow is generated in the separation exhaust part 17, and the grain T does not float in the separation exhaust part 17 as in the prior art. Therefore, the “floating residual phenomenon” As a result, all the grains T in the separation exhaust part 17 can be discharged without stopping the blower 2.

Between the outer periphery of the separation exhaust part 17 and the inner peripheral surface of the lower outer case 32 of the grain separation device 12, a suction chamber 27 of the powdery substance removal unit 25 is formed, and the suction chamber 27 has a partition plate 29 and a suction chamber. 27 is enclosed in a sealed state by a rotary valve 18 and a lower outer case 32, and suction is performed from both the upper and lower sides of the suction chamber 27. Therefore, the suction of the suction chamber 27 that sucks the inside of the separation exhaust portion 17 is performed. While increasing the force to increase the discharge efficiency of the powdery substance F, the residual of the powdery substance F in the suction chamber 27 can be suppressed, and maintenance can be facilitated.
That is, if the suction chamber 27 is simply sucked from above, suction spots are generated, and the powdery substance F adheres to the portions with the suction spots and eventually accumulates as the residual powdery substance F. By sucking the inside of the chamber 27 from both the upper and lower sides, it is possible to improve the removal efficiency of the powdery substance F and to suppress the residue of the powdery substance F.

Specifically, the lower part of the plurality of upper exhaust branch pipes 40 is connected to the partition plate 29 at the upper part of the suction chamber 27, and the upper part of each upper exhaust branch pipe 40 is an exhaust side provided on the upper part of the upper outer case 19. Since one end of the connection nozzle 41 is collectively connected and the other end of the exhaust side connection nozzle 41 is connected to the exhaust side transfer cylinder 42, the upper side of the suction chamber 27 is sucked and exhausted by a plurality of upper exhaust branch pipes 40. Then, the powdery substance F is discharged by the exhaust air.
One end of a plurality of lower exhaust branch pipes 43 is connected to the lower outer case 32 above the rotary valve 18 below the suction chamber 27, and the other end of each lower exhaust branch pipe 43 is connected to the intermediate exhaust pipe 44. Since the other end of the intermediate exhaust pipe 44 is connected to the exhaust-side transfer cylinder 42, the lower side of the suction chamber 27 is lowered by the plurality of lower exhaust branch pipes 43. Suction and exhaust to the side, and the powdery substance F is discharged.

  Further, since the plurality of upper exhaust branch pipes 40 and the lower exhaust branch pipes 43 are connected to each other at a predetermined interval in the circumferential direction, the inside of the suction chamber 27 is not only in the vertical direction but also in the circumferential direction. In this respect, it is possible to improve the removal efficiency of the powdery substance F on the surface of the grain T and to suppress the residual of the powdery substance F to facilitate maintenance. it can.

  Thus, the powdery substance removing unit 25 of the present application flows toward the suction chamber 27 from the suction air of the suction chamber 27 sucked from the upper and lower sides around the separation exhaust unit 17 and the opening hole 26 of the separation exhaust unit 17. The grain T can be brought into contact with the inner peripheral surface of the separation exhaust part 17 by the vortex wind of the conveying wind in the separation exhaust part 17, and the removal efficiency of the powdery substance F on the surface of the grain T is increased. The maintenance of the powdery substance F can be suppressed and the maintenance of the powdery substance F can be facilitated. Also, the single blower 2 can convey the grain T and the dust T such as the powdery substance F and rice flour from the grain T. Removal and collection of the powdery substance F can be performed continuously.

The powdery substance F separated from the conveyed grain T by the powdery substance removing unit 25 of the grain separation apparatus 12 is conveyed to the powdery substance separation apparatus 50 by the exhaust side conveyance cylinder 42 of the conveyance cylinder 1 and separated into powdery substances. The powdery substance F conveyed by the apparatus 50 is separated from the conveying air.
The powdery substance F separated by the powdery substance separation apparatus 50 is recovered by being pumped to the powdery substance recovery part 52 by the exhaust cylinder 51 of the blower 2 connected to the discharge part of the powdery substance separation apparatus 50.
On the other hand, the grain T from which the powdery substance F has been removed and separated from the air enters the storage tank 11 and is supplied from the storage tank 11 to the next process G such as color selection work or weighing / bagging work.

As a result, of the air conveyance conveyance mechanism of the grain air conveyance device H, the powder separation unit 25 that removes the powder F is incorporated in the grain separation device 12 that separates the grain T and the conveyance air. Therefore, the attenuation mechanism of the conveying wind of the grain separation device 12 can be used also as the separation mechanism of the powdery substance removing unit 25, and a rational configuration is obtained.
Moreover, by incorporating the grain separation device 12 having the powdery substance removing unit 25 into the conveyance path of the air conveying apparatus H, the conveyance of the grain T, the removal (selection) of the powdery substance F, and the recovery of the powdery substance F. Can be performed during grain conveyance.

  The separation exhaust part 17 is provided at the lower part of the intake part 15. The intake part 15 is detachably attached to the upper surface side of the partition plate 29 provided at the lower part of the upper outer case 19 of the grain separation device 12. Since the upper part of the upper funnel part 30 of the separation exhaust part 17 is detachably attached to the lower surface side and the lower funnel part 31 is detachably attached to the upper funnel part 30, the lower outer case 32 is removed from the upper outer case 19. The lower funnel portion 31 can be removed from the upper funnel portion 30, and maintenance can be facilitated.

Since the opening 45 is provided at a predetermined position of the lower outer case 32 and the inspection lid 46 is detachably provided in the opening 45, the outer periphery of the separation exhaust unit 17 is exposed when the inspection lid 46 is removed. Maintenance such as removal of deposits can be easily performed.
In this case, of the openings 45 provided in the lower outer case 32, one large opening 45A has an opening area that is substantially half the surface area of the lower outer case 32, and the other opening 45B is 1 as shown in the figure. Since the opening area of the eighth surface is opposed to the large opening 45A, the rigidity of the lower outer case 32 and the airtightness of the suction chamber 27 are ensured and the maintenance is facilitated.

Furthermore, the large opening 45A of the lower outer case 32 is formed in such a size that the lower funnel portion 31 removed from the upper funnel portion 30 can be taken out of the lower outer case 32. The attachment and detachment work of the side funnel portion 31 is facilitated to facilitate maintenance.
Moreover, the inspection lid 46 attached to the opening 45 of the upper outer case 19 among the openings 45 is attached so as to be openable and closable so as to be openable and closable, so that maintenance around the intake portion 15 is facilitated.

  DESCRIPTION OF SYMBOLS 1 ... Conveyance cylinder, 2 ... Blower, 10 ... Overhang hopper, 11 ... Storage tank, 12 ... Grain separation device, 15 ... Intake part, 17 ... Separation exhaust part, 18 ... Rotary valve, 19 ... Upper outer case, 20 DESCRIPTION OF SYMBOLS ... Supply side conveyance cylinder, 21 ... Supply side connection nozzle, 22 ... Guide body, 25 ... Powdery substance removal part, 26 ... Opening hole, 27 ... Suction chamber, 28 ... Corner | angular part, 29 ... Partition plate, 30 ... Upper funnel , 31 ... lower funnel part, 32 ... lower outer case, 33 ... lower cylinder part, 35 ... engagement protrusion, 36 ... engagement groove, 37 ... engagement protrusion, 38 ... engagement groove, 40 ... upper exhaust Branch pipe 41 ... Exhaust side connection nozzle 42 ... Exhaust side transfer cylinder 43 ... Lower exhaust branch pipe 44 ... Intermediate exhaust pipe 45 ... Opening part 46 ... Inspection lid 48 ... Handle 50 ... Powder Separator, 51 ... exhaust pipe, 52 ... powdery substance recovery part.

In the first aspect of the invention, since the conveying air is exhausted from the suction chamber 27 provided only around the separation exhaust part 17, the removal efficiency of the powdery substance F can be improved.
In the invention of claim 2, since the conveying air in the separation exhaust part 17 is sucked and exhausted from the upper and lower sides of the suction chamber 27, the removal efficiency of the powdery substance F can be improved and the residual of the powdery substance F can be prevented. In addition, since a plurality of upper exhaust branch pipes 40 are connected to the upper side of the suction chamber 27 and a plurality of lower exhaust branch pipes 43 are connected to the lower side of the suction chamber 27, suction exhaust from both the upper and lower sides of the suction chamber 27 is performed. The structure can be easily configured, and a plurality of upper exhaust branch pipes 40 are arranged in a space between the inner periphery of the upper outer case 19 surrounding the intake portion 15 and the outer periphery of the intake portion 15. Since the plurality of upper exhaust branch pipes 40 and the lower exhaust branch pipes 43 are arranged in the circumferential direction, the suction efficiency of the suction chamber 27 is improved and the powdery substance F is removed. Improves efficiency and prevents powder F from remaining, and separate exhaust 17 is divided into the upper funnel portion 30, the lower funnel portion 31, and the lower tubular portion 33, and the opening 26 is formed in the lower funnel portion 31, so that the most maintenance such as clogging removal is required. Only the lower funnel portion 31 to be removed can be removed, maintenance can be facilitated, and the opening 45 is provided in the lower outer case 32, so that the inspection lid 46 is removed and the periphery of the separation exhaust portion 17 is removed. Can be opened, maintenance can be facilitated, and since the lower funnel portion 31 disassembled from the opening 45 can be taken in and out, the maintenance can be further facilitated.
In the invention of claim 3, since the conveying air in the separation exhaust part 17 is sucked and exhausted from the upper and lower sides of the suction chamber 27, the removal efficiency of the powdery substance F can be improved and the residual of the powdery substance F can be prevented. .
In the invention of claim 4, a plurality of upper exhaust branch pipes 40 are connected to the upper side of the suction chamber 27 and a plurality of lower exhaust branch pipes 43 are connected to the lower side of the suction chamber 27. It is possible to easily configure the suction / exhaust configuration from
In the invention of claim 5, since the plurality of upper exhaust branch pipes 40 are arranged in the space between the inner periphery of the upper outer case 19 surrounding the intake portion 15 and the outer periphery of the intake portion 15, the airframe is made compact. Can be configured.
In the invention of claim 6, since the plurality of upper exhaust branch pipes 40 and lower exhaust branch pipes 43 are arranged in the circumferential direction, the suction efficiency of the suction chamber 27 is improved and the powdery substance F is removed. Efficiency can be improved and the residue of the powdery substance F can be prevented.
In the invention of claim 7, the separation exhaust part 17 is divided and formed by the upper funnel part 30, the lower funnel part 31 and the lower cylindrical part 33, and the opening hole 26 is formed in the lower funnel part 31. Only the lower funnel portion 31 requiring the most maintenance such as clogging removal can be removed, and the maintenance can be facilitated.
In the invention of claim 8, since the opening portion 45 is provided in the lower outer case 32, the inspection cover 46 can be removed to open the periphery of the separation exhaust portion 17, and maintenance can be facilitated. Since the lower funnel portion 31 disassembled from the opening 45 can be taken in and out, the maintenance can be further facilitated.
In the invention of claim 9, since the small small opening 45B is provided so as to face the large opening 45A in which the lower funnel portion 31 of the lower outer case 32 can be taken in and out, the side facing the large opening 45A is provided. The periphery of the separation exhaust part 17 can be opened by the opening 45B, and maintenance can be facilitated.
In the invention of claim 10, since the conveying wind and the grain T are separated by the separation exhaust part 17, and flow down on the opening hole 26 of the separation exhaust part 17 and sucked by the suction chamber 27, the grain T and the powdery substance F can be selected, and the selected powdery substance F can be collected by the powdery substance separating device 50 , improving the removal efficiency of the powdery substance F in the separation exhaust section 17, and powdery. Residue of the product F can be prevented, a dedicated device for removing the powdered material F is not required, and the processing cost for waste rice can be reduced, and it is a normal rice milling facility. Moreover, since the powdery substance F adhering during conveyance is removed, it can suppress that the powdery substance F accumulates in the conveyance cylinder 1, the storage tank 11, etc., and can reduce maintenance work and maintenance work frequency.

In this case, when the peripheral edge of the opening hole 26 is a sharp corner portion 28 called a so-called edge, when the grain T collides, the cutting action / effect of the adhered powdery substance F of the grain T can be improved, The removal / separation efficiency is improved, which is preferable.
Further, since the separation exhaust part 17 is formed in a funnel shape whose diameter in accordance leading downwards, more, as the pressure at which sliding contact with the spiral to the inner peripheral surface of the separator exhaust part 17 is increased, sliding contact time And the removal efficiency of the powdery substance F is improved.
Since the powdery substance removing unit 25 is configured by forming a suction chamber 27 around the separation exhaust unit 17, a free powdery substance F (rice cake or bran) that is released from the grain T in the conveying wind. In addition, the grain T surface layer (rice cake or bran) generated during the conveyance is discharged through the suction chamber 27 from the opening hole 26 of the separation exhaust part 17 of the powdery substance removal unit 25 together with the conveyance wind.

Claims (10)

  The end of the transport cylinder 1 that transports the grain T put into the tension hopper 10 to the storage tank 11 by the suction transport wind of the blower 2 is sealed with a non-perforated plate that decelerates the transport air taken from the transport cylinder 1. It connects with the upper side part of the intake part 15 formed in the formed cylindrical shape, and it becomes thin as it goes to the lower part where the rotary valve 18 for supplying the grain T to the storage tank 11 is provided below the intake part 15. A funnel-shaped separation exhaust part 17 is provided. The separation exhaust part 17 includes an opening 26 formed in a part or all of the separation exhaust part 17 and a lower outer case 32 that surrounds the separation exhaust part 17 in a sealed manner. A suction chamber 27 formed between the outer periphery of the separation exhaust part 17 and the inner periphery of the lower outer case 32 separates the transport wind and the grain T in the separation exhaust part 17 and transports the transport wind from the suction chamber 27. Grain with a structure to exhaust Away equipment.   In claim 1, the suction chamber 27 is configured to suck and exhaust the conveying air in the separation exhaust portion 17 from both upper and lower sides of the suction chamber 27, and one end of a plurality of upper exhaust branch pipes 40 is disposed above the suction chamber 27. One end of a plurality of lower exhaust branch pipes 43 is connected to the lower side of the suction chamber 27, and an upper outer case 19 surrounding the intake portion 15 is provided above the lower outer case 32. A plurality of upper exhaust branch pipes 40 are arranged in a space between the inner periphery of the case 19 and the outer periphery of the intake portion 15, and the lower part of the upper exhaust branch pipe 40 is connected to the upper part of the sealed suction chamber 27 and sealed. One end of a plurality of lower exhaust branch pipes 43 is connected to the lower part of the suction chamber 27, and the plurality of upper exhaust branch pipes 40 and the lower exhaust branch pipes 43 are respectively sucked at predetermined intervals in the circumferential direction. Connected to the chamber 27, the lower part of the intake 15 is the intake 15 is attached to a partition plate 29 provided at the lower part of the upper outer case 19 surrounding the periphery of the upper part 15, and the separation exhaust part 17 is attached to an upper funnel part 30 attached to the partition plate 29 and a lower part attached to the lower part of the upper funnel part 30. The upper funnel portion 31 is divided into upper and lower portions, and at least the opening 26 is formed in the lower funnel portion 31 and the lower outer case 32 side provided below the upper funnel portion 30 and the upper outer case 19 And an opening 45 closed by a removable inspection lid 46 is provided at a predetermined position of the lower outer case 32 surrounding the separation exhaust part 17. Is a grain separation device formed in a size that allows the removed lower funnel portion 31 to be taken in and out.   The grain separation device according to claim 1, wherein the suction chamber 27 sucks and exhausts the conveying air in the separation exhaust unit 17 from both upper and lower sides of the suction chamber 27.   4. One end of a plurality of upper exhaust branch pipes 40 is connected to the upper side of the suction chamber 27, and one end of a plurality of lower exhaust branch pipes 43 is connected to the lower side of the suction chamber 27. Grain separator.   The upper outer case 19 surrounding the intake portion 15 is provided above the lower outer case 32, and the space between the inner periphery of the upper outer case 19 and the outer periphery of the intake portion 15 is defined in claim 1, claim 3, or claim 4. A plurality of upper exhaust branch pipes 40 are arranged in the space, and a lower part of the upper exhaust branch pipe 40 is connected to an upper part of the sealed suction chamber 27, and a plurality of lower exhaust pipes are connected to the lower part of the sealed suction chamber 27. A grain separator in which one end of the branch pipe 43 is connected.   6. The grain separator according to claim 5, wherein the plurality of upper exhaust branch pipes 40 and the lower exhaust branch pipes 43 are connected to the suction chamber 27 at predetermined intervals in the circumferential direction.   In claim 1, claim 3, claim 4, claim 5, or claim 6, the lower portion of the intake portion 15 is formed by a partition plate 29 provided at a lower portion of the upper outer case 19 surrounding the intake portion 15. The separating and exhausting part 17 is divided into upper and lower parts by an upper funnel part 30 attached to the partition plate 29 and a lower funnel part 31 attached to the lower part of the upper funnel part 30, and at least the lower funnel part is formed. The grain separation device which formed the opening hole 26 in the part 31, and was comprised detachably with respect to each of the upper outer case 30 and the lower outer case 32 side provided in the lower side of the upper outer case 19. FIG.   8. The lower funnel portion according to claim 7, wherein an opening 45 closed by a removable inspection lid 46 is provided at a predetermined position of the lower outer case 32 surrounding the separation exhaust portion 17, and the opening 45 is removed. A grain separator formed in a size that allows 31 to be taken in and out.   In Claim 8, the lower outer case 32 formed at the lower outer case 32 and facing the large opening 45A having a size that allows the removed lower funnel portion 31 to be taken in and out is smaller than the large opening 45A. The grain separator which formed the opening part 45B.   The grain T is thrown into the tension hopper 10 connected to the starting end portion of the transport cylinder 1 that is sucked from the air intake portion of the blower 2 and through which suction air flows. The inner periphery of the separation exhaust unit 17 that is air-transported to the intake unit 15 of the grain separation device 12 and decelerates with the intake unit 15 using a vortex flow as the conveyance wind, and becomes narrower as it goes downward. The grain T is dropped while being brought into sliding contact with the grain T to be collected in the storage tank 11 while removing the powdery substance F on the surface of the grain T, and the powdery substance F is dropped from the opening hole 26 provided in the separation exhaust part 17. Then, the powdery substance F and the grain T are sorted, and the conveying air that has entered the separation exhaust part 17 is sucked and exhausted from the opening hole 26 to the suction chamber 27 provided around the separation exhaust part 17. The powdery substance F separated from the conveying air and entering the suction chamber 27 through the opening hole 26 is removed from the suction chamber 2. Grain air transport method for separating and collecting conveyor to form a powdery product F and the carrier air to the powder material separating device 50 provided in the middle of the transporting cylinder 1 by transporting cylinder 1 connected to.

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