JP5184913B2 - Dust collector - Google Patents

Description

  The present invention relates to a dust removal device, and more particularly to a dust removal device applied to a grain processing device.

  2. Description of the Related Art Conventionally, there are some grain processing apparatuses such as a grain drying apparatus provided with a dust removing device for discharging dust floating and separated from grains in a conveying basket for conveying grains (see, for example, Patent Document 1). ).

Such a dust removal apparatus includes a dust collection box disposed on the upper side of the conveying basket. The inside of the dust box is communicated with the inside of the conveying basket, and an intake hole (outside air intake hole) is formed on the side wall thereof. In addition, a blower is attached to the upper portion of the dust box, and when the blower is activated, outside air flows into the dust box from the outside air intake hole. The outside air that has flowed into the dust box is guided by an air guide plate mounted inside the dust box, and once enters the transport box, then rises in the dust box and is sucked into the blower. For this reason, the outside air taken in from the outside air intake hole acts as a suction air that sucks and removes the dust in the conveying basket. Further, in such a dust exhaust device, the suction force of the suction air is adjusted by adjusting the intake amount of the outside air from the outside air intake hole by the adjustment plate attached to the side wall of the dust box. It has become.
JP-A-9-113135

  By the way, in the dust exhaust apparatus as described above, the air (dust) in the conveying basket is directly sucked into the dust box and the outside air is taken in from the outside air intake hole formed in the dust box. There is a type that adjusts the suction force of the suction air by adjusting the amount. However, in such a type of dust removal device, when the amount of dust in the conveying basket is large, dust sucked into the dust box may be occasionally discharged from the outside air intake hole.

  In view of the above facts, an object of the present invention is to obtain a dust removal device capable of suppressing dust from being discharged from an outside air intake hole of a dust box.

The dust removal device according to the first aspect of the present invention is formed in a box shape, the inside communicates with a conveyance path through which grains are conveyed, and the inside is a device through an outside air intake hole formed in the upper wall. A dust box that communicates with the outside and has a dust discharge hole formed in the bottom wall facing the outside air intake hole, and sucks air in the dust box through the dust discharge hole; And a suction discharge means for discharging to the outside.

  In the dust discharge device according to claim 1, when the suction / discharge means sucks air in the dust box through the dust discharge hole, the inside of the dust box becomes negative pressure, and the inside of the dust box comes from the outside air intake hole. Outside air flows into the air, and air in the conveyance path flows into the dust box. As a result, an air flow (suction air) that flows from the transfer path into the dust box and is discharged to the outside of the apparatus through the dust discharge hole is generated. For this reason, the dust separated from the grain in the conveyance path is sucked into the dust box by the air flow and discharged to the outside of the apparatus together with the air flow.

Here, the dust sucked into the dust box by the air flow tries to fall to the bottom wall side of the dust box due to the action of gravity when flowing in the dust box. A dust discharge hole is formed in the bottom wall of the dust box. Therefore, the dust sucked into the dust box is guided to the dust discharge hole on the bottom wall by both the suction force of the air flow and the gravity . For this reason, since it can suppress that dust goes to the upper wall side, it can suppress that dust is discharged | emitted from the external air intake hole formed in the said upper wall.

A dust discharger according to a second aspect of the present invention is the dust discharger according to the first aspect, wherein the conveying path is connected to the lower end of the cereal tower of the grain drying device via a connecting portion. It is characterized by being comprised by the conveyance basket and the said communication part .

  As described above, in the dust removal apparatus according to the present invention, it is possible to suppress the dust from being discharged from the outside air intake hole of the dust box.

  FIG. 1 is a perspective view schematically showing a grain drying device 12 configured by applying a dust removing device 100 according to an embodiment of the present invention. FIG. 2 shows the grain drying device 12 in a longitudinal sectional view. 3 is a longitudinal sectional view showing the configuration of the dust box 102 and its peripheral members constituting the dust collector 100, and FIG. 4 shows the configuration of the dust box 102 and its peripheral members. Is shown in a perspective view. Furthermore, FIG. 5 shows a partial configuration of the dust box 102 in a cross-sectional view.

  First, the grain drying device 12 will be described.

  The grain drying device 12 is a so-called circulation heating type drying device that heats and drys the grain (indicated by the symbol K in FIGS. 2 and 3) in the machine body 14. The grain drying device 12 has a grain storage tank 15 in the upper portion of the machine body 14, and the grain K to be dried is stored in the tank 15.

  A drying unit 17 is provided below the tank 15. The drying unit 17 has a pair of exhaust path partition walls 64. The exhaust passage partition 64 has air permeability. Each exhaust passage partition wall 64 is bridged between the front plate 14C and the rear plate 14D of the machine body 14. Each exhaust passage partition wall 64 is inclined downwardly from each side plate (the left side plate 14A and the right side plate 14B in FIGS. 1 and 2) toward the center in the left-right direction of the fuselage 14. The pair of exhaust passage bulkheads 64 has a funnel shape.

  A wind tunnel plate 66 having a substantially rhombic cylindrical shape is provided inside the airframe 14 of the pair of exhaust passage partition walls 64. The wind tunnel plate 66 has air permeability. The wind tunnel plate 66 is bridged between the front plate 14C and the rear plate 14D of the fuselage 14, and the lower side of the wind tunnel plate 66 is parallel to the opposing exhaust passage partition walls 64. The inside of the plate 66 is a hot air path 68. Corresponding to the hot air passage 68, a furnace case 11 having a burner (not shown) is attached to the front plate 14 </ b> C of the fuselage 14, and the furnace case 11 and the outside air inlet 13 thereof communicate with the hot air passage 68.

  Between the upper side of the wind tunnel plate 66 and the upper part of each exhaust passage partition 64, a substantially rhombic cylindrical air guide passage partition 70 is provided. Each air guide path partition 70 has air permeability. Each air guide partition 70 is bridged between the front plate 14 </ b> C and the rear plate 14 </ b> D of the airframe 14, and the inside of each air guide partition 70 is an air guide 72. The lower side of each of the air guide partition walls 70 is parallel to each of the opposing exhaust path partition walls 64 and parallel to the opposing wind tunnel plate 66.

  On the left side and the right side of the wind tunnel plate 66, between the wind tunnel plate 66 and the wind guide partition wall 70, between the wind guide partition wall 70 and the exhaust channel partition wall 64, and between the wind tunnel plate 66 and the wind guide plate 66. A grain flow path 74 is formed between the air path partition wall 64. In each grain flow path 74, the grain K stored in the tank 15 is guided in a natural flow manner.

  The drying unit 17 as described above applies a hot air (see arrow W in FIG. 2) to the grain K passing through the grain flow path 74 and performs a heat drying process.

  A cylindrical shutter drum 76 is provided between the lower ends of the grain flow paths 74. The shutter drum 76 substantially closes the lower end of each grain flow path 74 and is spanned between the front plate 14C and the rear plate 14D of the machine body 14 so as to be rotatable about its axis. A pair of rectangular slits 78 elongated in the axial direction are formed on the outer periphery of the shutter drum 76. One slit 78 is disposed on the front side of the outer periphery of the shutter drum 76, and the other slit 78 is Further, it is disposed on the rear side of the outer periphery of the shutter drum 76 and on the opposite side in the circumferential direction of one slit 78. Here, as the shutter drum 76 rotates and each slit 78 faces the lower end of each grain flow path 74, the grain K in each grain flow path 74 flows into the shutter drum 76 via each slit 78, Further, the shutter drum 76 rotates and the slits 78 face downward, so that the grain K flowing into the shutter drum 76 is discharged downward.

  A pair of tension flow plates 80 is provided below the pair of exhaust passage partition walls 64. Each stretched flow plate 80 is bridged between the front plate 14C and the rear plate 14D of the body 14. The pair of tension flow plates 80 are inclined downward from the side plates 14A and 14B of the machine body 14 toward the center in the left-right direction of the machine body 14 to form a funnel shape. In addition, an air exhaust passage 82 is provided between each stretched flow plate 80 and each air exhaust passage partition 64.

  Corresponding to the exhaust path 82, the exhaust plate 23 having a suction blower (not shown) is attached to the rear plate 14D of the airframe 14, and the exhaust duct 23 and the exhaust wind hose 19 connected thereto are connected to the exhaust path. 82. The exhaust air hose 19 passes through the outer wall (not shown) of the building that houses the grain drying device 12, and the outside air (dry air) taken from the outside air inlet 13 of the furnace case 11 by the suction force of the suction blower. To the outside of the building.

  A tension hopper 84 is provided at the bottom of each side plate 14A, 14B of the body 14 so as to be openable and closable. The grain drying device 12 can tension (supply) the grain K into the machine body 14 by opening each of the tension hoppers 84. Here, the grain K discharged from the shutter drum 76 or the grain K stretched from the stretch hopper 84 flows down between the lower ends of the stretch flow plates 80.

  A lower conveyance rod 16 is provided below between the lower ends of the stretched flow plates 80. The lower conveyance rod 16 extends horizontally inside the machine body 14, and one end portion of the lower conveyance rod 16 is exposed to the outside (front plate 14 </ b> C side) of the machine body 14 (see FIG. 1), and the downstream end portion in the conveyance direction. It is said that.

  A lower screw conveyor 18 is provided in the lower conveying basket 16. The lower screw conveyor 18 is arranged with the axial direction horizontal, and the lower screw conveyor 18 rotates in the direction of arrow A in FIG. Part) side to one end part (end part on the downstream side in the transport direction) side.

  In addition, a communication unit 20 is provided at the downstream end of the lower transport rod 16 in the transport direction so as to communicate with the downstream end of the lower transport rod 16 in the transport direction. This connecting portion 20 is conveyed by the lower screw conveyor 18 to the downstream end of the lower conveying basket 16 in the conveying direction, and guides the grain K jumped by the jumping plate 21 to the cerealing machine 22 in a natural flow manner. .

  The whipping machine 22 includes a cerealing tower 24 having a substantially rectangular tube shape. The whipping tower 24 is connected to the lower conveyance basket 16 via the communication unit 20, and the lower end portion of the whipping tower 24 communicates with the communication unit 20. For this reason, the cereal tower 24 can receive the grain K transported to the downstream end portion in the transport direction of the lower transport basket 16 through the communication unit 20.

  A lower pulley 26 is arranged in the lower part of the cereal tower 24 with the axial direction being horizontal. In addition, an upper pulley 27 (FIG. 2) is also provided in the upper part of the cereal tower 24 in the cereal tower 24, and the outer periphery of the lower pulley 26 and the upper pulley 27 is endless. A belt 28 is wound around. Further, a plurality of buckets 30 are provided at equal intervals on the outer peripheral portion of the endless belt 28. The upper pulley 27 is connected to a driving device (not shown). The upper pulley 27 receives a driving force from the driving device and is counterclockwise in FIG. 2 (corresponding to an arrow B direction in FIG. 3). Rotate to. For this reason, when the upper pulley 27 rotates counterclockwise, the endless belt 28 circulates and the lower pulley 26 rotates counterclockwise, and the bucket 30 is supplied to the lower portion of the milling tower 24. Grain cereal K in order.

  In addition, a long bowl-shaped upper transport bar 88 is provided at the upper end of the machine body 14, and the lower surface of the rear end of the upper transport bar 88 is opened at the center in the front-rear direction of the machine body 14. The front end in the upper conveying basket 88 is communicated with the upper end in the cereal tower 24, and the grain K conveyed to the upper end in the cereal tower 24 flows down to the front end in the upper conveying basket 88. An upper screw conveyor 86 is provided in the upper conveying basket 88. The upper screw conveyor 86 is disposed with the axial direction set in the horizontal direction, and the grain K that has flowed down to the front end in the upper conveying basket 88 is conveyed rearward by the upper screw conveyor 86. In addition, the front end in the upper conveyance rod 88 is connected to a discharge port 90 having an on-off valve (not shown) and a discharge pipe 91 connected thereto, and flows down to the front end in the upper conveyance rod 88 when the on-off valve is opened. The cereal grains K are discharged from the circulation type grain drying device 12 through the discharge port 90 and the discharge pipe 91.

  A disk-shaped leveling machine 92 is rotatably provided below the rear end of the upper screw conveyor 86. Grain K transported to the rear end of the upper screw conveyor 86 (rear end in the upper transport basket 88) flows down to the upper surface of the rotating leveling machine 92, so that it is evenly distributed into the tank 15 by centrifugal force. Is done.

  Next, the dust removal device 100 will be described.

  In the present grain drying device 12, as shown in FIG. 3, the upper ends of the lower conveyance basket 16 and the connecting portion 20 are closed by the top wall 32, and the dust removal device 100 is placed on the top surface of the top wall 32. A dust box 102 to be configured is attached. Below the dust box 102, a grain K conveyance path 21 constituted by the lower conveyance basket 16 and the communication unit 20 is arranged.

  As shown in FIGS. 4 and 5, the dust box 102 includes a box body 104 formed in a long hollow rectangular parallelepiped shape (box shape). The box body 104 is arranged in a state where the longitudinal direction is along the front-rear direction of the body 14. The box body 104 is composed of an upper wall 104A, a bottom wall 104B, a right wall 104C, a left wall 104D, and a rear wall 104E, and a front end portion (one longitudinal end portion) is open.

  A fastening piece 104F that protrudes to the right side of the box body 104 is provided at the lower end of the right wall 104C on the front end side of the box body 104. Further, a fastening piece 104G (see FIG. 3) that protrudes to the left side of the box body 104 is provided at the lower end portion of the left wall 104D, and these fastening pieces 104F and 104G are fastened to the top wall 32. The box body 104 is fixed to the top wall 32. Note that the rear end side of the box body 104 protrudes to the rear side of the top wall 32 with the bottom wall 104B exposed downward.

  The front end portion of the right wall 104C is disposed so as to recede slightly toward the rear wall 104E than the front end portions of the upper wall 104A and the left wall 104D, and the front end portion of the bottom wall 104B is located from the front end portion of the right wall 104C. Is also significantly retracted toward the rear wall 104E. Further, a hook 104H that protrudes toward the right wall 104C is provided at the front end of the left wall 104D. The hook 104H corresponds to the front window 106 that constitutes the dust box 102 together with the box body 104.

  The front window 106 is for closing the front end opening of the box body 104 and is formed in a plate shape from a transparent material. As shown in FIG. 6, a fitting piece 106A that protrudes toward the front side of the box body 104 is provided at the left end of the front window 106, and this fitting piece 106A is connected to the hooking portion 104H described above. The left end portion of the front window 106 is restrained by the box body 104 by being fitted with a wind selection plate 116 described later.

  Further, a fastening piece 106 </ b> B that protrudes toward the rear end side of the box body 104 is provided at the right end portion of the front window 106. The fastening piece 106B is fastened to the right wall 104C by the butterfly bolt 108 in a state of being superimposed on the outer surface of the right wall 104C. As a result, the right end portion of the front window 106 is restrained by the box body 104, and the front window 106 is fixed to the box body 104.

  Note that projecting pieces 106C and 106D projecting to the front side of the box body 104 are provided at both upper and lower ends of the front window 106. The front window 106 has an upper end projecting piece 106C on the lower surface of the upper wall 104A. The upper and lower walls 104 </ b> A and 32 </ b> A are fitted in a state where the protruding piece 106 </ b> D at the lower end is in contact with the upper surface of the top wall 32. As a result, the front end opening of the box body 104 is closed by the front window 106.

  Further, as described above, the front end portion of the bottom wall 104B of the box body 104 is disposed so as to recede greatly toward the rear wall 104E with respect to the front end portions of the upper wall 104A, the left wall 104D, and the right wall 104C. Therefore, when the front end opening of the box body 104 is closed by the front window 106, an opening (dust intake hole 110, see FIG. 5) is formed between the front window 106 and the front end of the bottom wall 104B. The

  The dust intake hole 110 faces an opening formed in the top wall 32, and the inside of the box body 104 (dust box 102) is conveyed through the opening and the dust intake hole 110. 21 communicates with the inside. In the dust box 102, the front side (the side communicating with the conveyance path 21) is the wind power selection unit 112, and the rear side is the suction chamber unit 114.

  The wind selection unit 112 is provided with a wind selection plate 116. The wind selection plate 116 is formed by bending a plate material, and includes a joining portion 116A joined to the inner side surface of the left wall 104D of the box body 104. From the upper end of the joining portion 116A, a top plate portion 116B extends toward the right wall 104C side. The top plate 116B has a left side portion arranged in parallel with the upper wall 104A, and a right side portion inclined toward the lower end side of the right wall 104C. A joining portion protruding upward is provided at the right end portion of the top plate portion 116B, and this joining portion is joined to the inner surface of the right wall 104C. A rectangular notch 118 is formed at the center of the top plate 116 (on the upper end side of the inclined portion), and is discharged through the notch 118, the dust intake hole 110, and the opening of the top wall 32. The inside of the dust box 102 communicates with the inside of the transport path 21.

  On the other hand, on the rear end side of the upper wall 104 </ b> A of the box main body 104, a rectangular outside air intake hole 120 that forms a wind control portion is formed. A metal mesh is attached to the outside air intake hole 120, and the inside of the dust box 102 (suction chamber portion 114) communicates with the outside of the apparatus through the outside air intake hole 120. A slide-type shutter 122 for opening and closing the outside air intake hole 120 is provided on the upper portion of the upper wall 104A. A long hole 124 extending in the front-rear direction of the dust box 102 is formed at the left end portion of the shutter 122, and a butterfly bolt 126 passing through the long hole 124 is screwed into the upper wall 104A. As a result, the shutter 122 is fastened to the box body 104, and the shutter 122 can be slid in the front-rear direction of the box body 104 by loosening the butterfly bolt 126. The opening area (exposure amount) of the outside air intake hole 120 is changed by sliding the shutter 122. Note that both end portions of the shutter 122 are bent upward on both sides in the longitudinal direction of the long hole 124, and a grip portion for sliding the shutter 122 is formed.

  On the other hand, as shown in FIG. 5, a suction pipe 128 formed in a cylindrical shape is attached to the lower surface of the bottom wall 104 </ b> B on the rear end side of the dust box 102 at a position facing the outside air intake hole 120. ing. The inside of the suction pipe 128 communicates with the inside of the dust box 102 (suction chamber portion 114) through a circular dust discharge hole 130 formed in the bottom wall 104B. The suction pipe 128 is connected to one end side of a dust exhaust duct 132 formed in a bellows shape, and the other end side of the dust exhaust duct 132 is connected to the rear side of the airframe 14 as shown in FIG. It is connected to the intake port of the installed suction blower 134. One end side of the discharge duct 136 is connected to the exhaust port of the suction blower 134, and the other end side of the discharge duct 136 passes through the outer wall (not shown) of the building that houses the grain drying device 12. It is located outside the building (hereinafter referred to as the outdoors).

  Here, in the dust exhaust device 100 having the above configuration, when the suction blower 134 is activated, the air in the dust box 102 is sucked from the dust discharge hole 130 to the suction blower 134 via the suction pipe 128 and the dust discharge duct 132. It is discharged to the outside through the discharge duct 136. For this reason, the inside of the dust box 102 becomes negative pressure, and outside air flows into the dust box 102 through the outside air intake hole 120, and also through the notch 118 and the dust inlet hole 110 of the wind selection plate 116. Air in the conveyance path 21 flows into the dust box 102. As a result, an air flow (suction air) flowing through the conveyance path 21 → the dust box 102 → the dust discharge duct 132 → the suction blower 134 → the discharge duct 136 → the outdoor path is generated. For this reason, the dust J floating and separated from the grain K conveyed in the conveying path 21 is sucked into the dust box 102 by the air flow (see FIG. 3), and discharged to the outdoors together with the air flow.

  The dust J sucked into the dust box 102 passes through the notch 118 of the wind selection plate 116. At this time, the grain K temporarily passes through the notch 118 together with the dust J by the suction force of the air flow. Even if it is going to be, it is difficult for the grain K to collide with the top plate part 116B, or to fall by its own weight and pass through the notch 118. For this reason, it is suppressed that grain K will be discharged with dust J to the outdoors. That is, since the grain K and the dust J are separated by the wind selection plate 116, the suction force of the air flow (the suction force of the suction blower 50) can be set strongly.

  Further, the suction force of the air flow can be increased or decreased by changing the opening area of the outside air intake hole 120 by the sliding operation of the shutter 122. That is, when the opening area of the outside air intake hole 120 is increased, the flow rate of the outside air flowing into the dust box 102 from the outside air intake hole 120 is increased, and the suction force of the air flow is reduced. Further, when the opening area of the outside air intake hole 120 is reduced, the flow rate of the outside air flowing into the dust box 102 from the outside air intake hole 120 is reduced, and the suction force of the air flow is increased. Therefore, the suction force of the air flow can be adjusted so that only dust J is sucked into the dust box 102. In addition, during this adjustment, since the suction state of the dust J can be observed through the transparent front window 106, the adjustment work can be easily performed.

  Next, the operation of this embodiment will be described.

  In the grain drying device 12, when the grain K is conveyed on the lower conveyance basket 16 by the lower screw conveyor 18 and conveyed to the downstream end of the lower conveyance basket 16 in the conveyance direction, the grain K is communicated by the jump plate 21. Jumped out to part 20. Grain K jumped to the communication unit 20 is guided to the lower part of the cereal tower 24 in a natural flow manner. In the milling tower 24, the upper pulley 27 receives a driving force from a driving device (not shown) and rotates in the counterclockwise direction (see arrow B) in FIG. The pulley 26 rotates counterclockwise, and the bucket 30 causes the grain K conveyed to the lower part in the cereal tower 24 to be picked up and conveyed to the upper part of the grain drying device 12.

  At this time, the suction blower 134 of the dust removal apparatus 100 is operated, so that the air flow (suction) flowing through the conveyance path 21 → the dust box 102 → the dust discharge duct 132 → the suction blower 134 → the discharge duct 136 → the outdoor path. Wind). Therefore, the dust J floating and separated from the grain K in the transport path 21 is sucked into the dust box 102 by the air flow and discharged to the outside together with the air flow.

  Here, the dust J sucked into the dust box 102 by the air flow flows along with the air flow toward the dust discharge hole 130 from the wind power sorting unit 112 to the suction chamber unit 114. As a result, the dust J tends to fall to the bottom wall 104B side (the side opposite to the top wall 104A) of the dust box 102. For this reason, since it can suppress that the dust J heads to the upper wall 104A side, it can suppress that the dust J is discharged | emitted from the external air intake hole 120 formed in 104 A of upper walls.

  Moreover, since the dust discharge hole 130 is formed in the bottom wall 104B, the dust J can be guided to the dust discharge hole 130 by both the suction force of the air flow and the gravity. Further, since the outside air intake hole 120 formed in the upper wall 104A faces the dust discharge hole 130 formed in the bottom wall 104B, the outside air blown down from the outside air intake hole 120 toward the dust discharge hole 130. The dust J can be guided to the dust discharge hole 130 also by the flow of. Thereby, since the discharge efficiency of the dust J from the dust box 102 can be improved, even when the amount of the dust J sucked into the dust box 102 is large, the dust J is removed from the outside air intake hole 120. It can suppress being discharged.

  Further, since the dust discharge hole 130 is formed in the bottom wall 104B, the dust J falling on the upper surface of the bottom wall 104B can also be sucked into the dust discharge hole 130. Therefore, dust J can be prevented from accumulating on the upper surface of the bottom wall 104B.

  Further, in this dust exhaust device 100, the front window 106 of the dust box 102 is restrained to the box body 104 at the left end by a fitting structure, and the right end is restrained to the box body 104 by one butterfly bolt 108. Has been. For this reason, the front window 106 can be easily detached from the box body 104 without using a tool by simply removing one butterfly bolt 108, so that the internal cleaning of the dust box 102 can be facilitated. Further, since the front window 106 can be easily attached to the box body 104, the assembly process of the dust box 102 can be facilitated.

  Furthermore, in the said embodiment, although the dust box 102 which comprises the dust removal apparatus 100 was provided in the vicinity of the connection part of the masher 22 and the lower screw conveyor 18, this invention replaces with this and dust collection For example, the box 102 may be provided in the vicinity of a connecting portion between the cerealing machine 22 and the upper screw conveyor 86.

It is a perspective view of the grain drying apparatus comprised by applying the dust removal apparatus which concerns on embodiment of this invention. It is a longitudinal cross-sectional view of the grain drying apparatus shown by FIG. It is a longitudinal cross-sectional view which shows the principal part of the dust box which comprises the dust exhaust apparatus which concerns on embodiment of this invention, and its peripheral member. It is a perspective view which shows the principal part of the dust box which comprises the dust collector which concerns on embodiment of this invention, and its peripheral member. It is a perspective view which shows the structure of the dust box which comprises the dust exhaust apparatus which concerns on embodiment of this invention. FIG. 6 is a cross-sectional view showing a partial configuration of the dust box shown in FIG. 5.

Explanation of symbols

12 Grain drying device 21 Conveyance path 100 Dust removal device 102 Dust collection box 104A Top wall 104B Bottom wall 120 Outside air intake hole 128 Suction pipe (suction discharge means)
130 Dust discharge hole 132 Dust discharge duct (suction discharge means)
134 Suction blower (suction discharge means)
136 Discharge duct (suction discharge means)

Claims (2)

Dust formed on the bottom wall, which is formed in a box shape and communicates with the outside through the outside air intake hole formed on the top wall while the inside communicates with the conveyance path through which the grain is conveyed A dust box having a discharge hole facing the outside air intake hole ;
A suction / discharge means for sucking air in the dust box through the dust discharge hole and discharging it to the outside of the apparatus;
Dust collector equipped with. 2. The dust discharge device according to claim 1, wherein the conveyance path includes a lower conveyance basket connected to a lower end portion of a cereal tower of a grain drying device via a communication unit and the communication unit.

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