Hulling classifier

Abstract

To solve a problem that, since a conveyance speed of a spiral and a lift in the inside of a hulling classifier is fixed irrespectively of a partition position of a partition plate, when an unpolished rice partition plate is at a low performance side, an amount of finished unpolished rice circulating in the inside of the classifier increases, so that the unpolished rice is easy to be damaged.SOLUTION: A hulling classifier includes: a hulling part that performs hulling; a conveyance part that conveys mixed rice of husk and unpolished rice obtained by hulling in the hulling part; and a swing classification plate that swings and classifies the mixed rice conveyed by the conveyance part. The hulling classifier is provided with a change adjustment part capable of changing the drive rotation speed of the conveyance part.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a rice husk sorting machine.

Background Art

[0002] A technique is described in Patent Document 1 in which a partition plate for partitioning polished rice and mixed rice is provided on the discharge side of a swing sorting plate, and the gap between rice husk rolls is adjusted according to the position of the partition plate.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Regardless of the partitioning position of the partition plate, since the conveyance speeds of the spiral and the elevator in the rice husk sorting machine are fixed, when the brown rice partition plate is on the low-efficiency side, the amount of polished rice circulating in the machine body increases, so there are cases where brown rice is easily damaged.

[0005] Therefore, an object of the present invention is to solve such problems.

Means for Solving the Problems

[0006] To achieve the above object, a first invention is In a rice husk sorting machine including a rice husk removal section for removing rice husks, a conveyance section for conveying a mixture of rice husks and brown rice husked in the rice husk removal section, and a swing sorting plate for swing sorting the mixture conveyed by the conveyance section, It is characterized in that a change adjustment section capable of changing the drive rotation speed of the conveyance section is provided.

[0007] A second invention is, in the first invention, A partition plate for partitioning polished rice and mixed rice sorted by the swing sorting plate is provided, The driving rotational speed of the conveying unit is increased as the partition plate moves to the high-efficiency side, and decreased as the partition plate moves to the low-efficiency side.

Effect of the Invention

[0008] According to the present invention, it is possible to make it difficult to damage the polished brown rice.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Mode for Carrying Out the Invention

[0010] The paddy fold sorter A of the present embodiment will be described.

[0011] A paddy storage hopper 1 for storing paddy is provided on one side of the left and right of the paddy fold sorter A. A paddy supply shutter 2 is provided at the bottom of the paddy storage hopper 1, and a pair of left and right paddy fold rolls 3 for removing the husk from the paddy are provided below the paddy supply shutter 2.

[0012] Below the paddy fold roll 3, a transfer shelf 4 for transferring the mixed rice of the husked paddy and brown rice to the center side of the left and right of the machine body is provided, and the discharge side of the transfer shelf 4 faces a wind selection unit 5 for sucking the paddy husk from the mixed rice.

[0013] An air suction fan 6 for discharging the sucked paddy husk from the dust exhaust cylinder 36 to the outside of the machine body is provided above the wind selection unit 5.

[0014] Below the winnowing section 5, a screw conveyor 7 for paddy and polished rice mixture is provided to convey the paddy and polished rice mixture that has fallen from the winnowing section 5 to the rear of the machine body. Above the screw conveyor 7 for paddy and polished rice mixture, a screw conveyor 8 for chaff is provided through which chaff in the paddy and polished rice mixture flows. The screw conveyor 8 for chaff is conveyed toward the front of the machine body and is configured to be stored in the paddy storage hopper 1 by the return slow conveyor 9.

[0015] At the rear of the machine body, a bucket-type elevator 10 for paddy and polished rice mixture is provided to elevate the paddy and polished rice mixture conveyed by the screw conveyor 7 for paddy and polished rice mixture.

[0016] On the discharge side of the elevator 10 for paddy and polished rice mixture, a tank 11 for paddy and polished rice mixture is provided to temporarily store the paddy and polished rice mixture. Below the tank 11 for paddy and polished rice mixture, a transfer chute 12 is provided to transfer the paddy and polished rice mixture, and the paddy and polished rice mixture is supplied from the transfer end side of the transfer chute 12 to the multi-stage oscillating sorting plates 13.

[0017] The surface of the oscillating sorting plates 13 is sorted into paddy, paddy and polished rice mixture, and finished brown rice as shown in Fig. 3. On the discharge side of the oscillating sorting plates 13, a brown rice partition plate 14 for partitioning the paddy and polished rice mixture and a paddy partition plate 15 for partitioning the paddy and the paddy and polished rice mixture are provided. The brown rice partitioned by the brown rice partition plate 14 is conveyed by the elevator 16 for finished brown rice when the circulation discharge switching valve 32 is on the discharge side. When the circulation discharge switching valve 32 is on the circulation side, it is supplied from the paddy and polished rice mixture flow path 17 to the screw conveyor 7 for paddy and polished rice mixture and circulates inside the machine body again. The paddy and polished rice mixture is supplied from the paddy and polished rice mixture flow path 17 to the screw conveyor 7 for paddy and polished rice mixture and circulates inside the machine body again. The paddy is supplied from the paddy flow path 18 to the return slow conveyor 9 and returned to the paddy storage hopper 1.

[0018] The transmission configuration will be described.

[0019] Power is transmitted from a main motor 19 provided on one side of the machine body on the side of the paddy rubbing roll 3 to the drive shaft 3a of the paddy rubbing roll 3 and the transfer shelf 4 by a transmission belt 20. Then, it is configured to be transmitted to the elevator 16 for finished brown rice by the transmission belt 20. The main motor 19 is a variable-speed motor and can be controlled by an inverter or the like.

[0020] The screw 7 for mixed rice and the elevator 10 for mixed rice are driven by a variable-speed conveyor drive motor 21. Also, the drive shaft of the oscillating sorting plate 13 is driven by a variable-speed oscillating drive motor 31. Further, the return slowdown 9, the chaff screw 8, and the suction fan 6 are driven by a variable-speed suction fan drive motor 33.

[0021] The opening degrees of the mixed rice tank 11 and the shutter 2 for supplying paddy are configured to be mechanically or electrically interlocked. When the amount of mixed rice stored in the mixed rice tank 11 increases, the opening degree of the shutter 2 for supplying paddy becomes smaller, and the amount of paddy supplied to the paddy rolling roll 3 becomes smaller.

[0022] A first nozzle 22 for blowing air onto the remaining rice is provided at the bottom of the elevator 10 for mixed rice, and a second nozzle 23 is provided at the bottom of the elevator 16 for polished rice. The first nozzle 22 and the second nozzle 23 are respectively connected to a first nozzle air pipe 26 and a second nozzle air pipe 27 that branch from a branch valve 25 connected to a common compressor 24.

[0023] The brown rice partition plate 14 is configured to be manually slidable in the left-right direction, and can be adjusted steplessly between the low-efficiency side n1 and the high-efficiency side n2 shown in FIG. 3. The position of the brown rice partition plate 14 is configured to be detectable by, for example, a slide-type position sensor 35.

[0024] Next, the operation panel S will be described.

[0025] A power switch 29, an operation start switch 34a, a stop switch 34b, and an operation lever 30 are provided.

[0026] As shown in FIG. 5, the control unit C of the paddy rolling and sorting machine A inputs information from various sensors and outputs control information to various motors.

[0027] Next, the paddy rolling operation will be described.

[0028] When the operation start switch 34a is turned ON, the main motor 19 is driven, and the husk roll 3, the suction fan 6, the slow conveyor 9, the chaff screw 8, and the finished brown rice elevator 16 start to be driven.

[0029] When the operator operates the operation lever 30 from the initial position L1 to the circulation position L2, the paddy supply shutter 2 opens, and the paddy in the paddy storage hopper 1 is supplied between the husk rolls 3 to start threshing. At the same time, the conveying drive motor 21 and the swing drive motor 31 start to be driven. The threshed mixed rice is supplied to the winnowing section 5 on the transfer shelf 4 and is affected by the suction fan 6. The husks are discharged outside the machine, and the chaff flows into the chaff screw 8 and returns to the paddy storage hopper 1 through the return slow conveyor 9. The mixed rice falls onto the mixed rice screw 7 and is supplied to the mixed rice elevator 10, and then is winnowed. The mixed rice supplied from the mixed rice elevator 10 to the mixed rice tank 11 and stored is sequentially supplied from the transfer trough 12 to the swing sorting plate 13 and sorted.

[0030] When the operator operates the operation lever 30 from the circulation position L2 to the discharge position L3, the circulation discharge switching valve 32 switches from the circulation position to the discharge position, and the finished brown rice discharged from the swing lifting side from the brown rice partition plate 14 set by the operator at an arbitrary position is discharged from the finished brown rice elevator 16 outside the machine and supplied to the rice sorter B. The mixed rice discharged between the paddy partition plate 15 and the brown rice partition plate 14 is returned to the mixed rice screw 7 through the mixed rice flow path 17 and is re-sorted by the swing sorting plate 13 again through the mixed rice elevator 10. The paddy discharged from the swing shaking-down side from the paddy partition plate 15 is returned to the paddy storage hopper 1 through the paddy flow path 18 and the return slow conveyor 9.

[0031] The operator sets the adjustment position of the brown rice partition plate 14, for example, on the low-efficiency side. In this case, the amount of finished brown rice discharged to the elevator 16 for finished brown rice decreases, and the amount of mixed rice returned to the screw 7 for mixed rice increases. Then, the amount of mixed rice in the mixed rice tank 11 is less likely to decrease, and the circulation amount of the mixed rice in the machine increases. Therefore, by controlling the conveying drive motor 21 so as to reduce the rotation speeds of the screw 7 for mixed rice and the elevator 10 for mixed rice, it is possible to prevent the brown rice in the mixed rice from being easily damaged. Also, when the adjustment position of the brown rice partition plate 14 is set on the high-efficiency side, since the amount of finished brown rice discharged to the elevator 16 for finished brown rice increases, by controlling the conveying drive motor 21 so as to increase the rotation speeds of the screw 7 for mixed rice and the elevator 10 for mixed rice, it is possible to promote the discharge of the finished brown rice outside the machine.

[0032] When the paddy in the paddy hopper 1 runs out, the circulation discharge switching valve 32 automatically switches from the discharge side to the circulation side, circulates the remaining mixed rice in the machine body, hulls the unhulled paddy, and performs a residual rice processing step of turning all of it into brown rice for a predetermined time. After the predetermined time, the circulation discharge switching valve 32 automatically switches from the circulation side to the discharge side, and discharges the remaining finished brown rice outside the machine. At this time, by controlling the swing drive motor 31 so as to increase the swing rotation speed of the swing sorting plate 13, it is possible to promote the discharge operation of the finished brown rice outside the machine. Also, during the residual rice processing step, by controlling the suction fan drive motor 33 so as to reduce the rotation speed of the suction fan 9, it is possible to reduce the amount of brown rice scattered from the dust exhaust cylinder 36.

[0033] During the discharge operation outside the machine, the compressor 24 is driven to blow air onto the rice remaining at the bottoms of the elevator 10 for mixed rice and the elevator 16 for finished brown rice, thereby reducing the amount of rice remaining at the bottoms. The air supply time varies depending on the variety. For example, for polished rice, etc., the standard injection time, and for rye, etc., since there is a lot of dust, the injection time is lengthened.

[0034] Regarding the control of the conveying drive motor 21 that changes the rotation speed of the mixed rice screw 7 according to the adjustment position of the brown rice partition plate 14, that is, the detection position of the position sensor 35, for example, when hulling short-grain and long-grain paddy, the conveying drive motor 21 may be controlled to reduce the rotation speed of the mixed rice screw 7 during the hulling and sorting operation of long-grain paddy where broken rice is likely to occur. In this case, a high-speed mode and a low-speed mode switch for the conveying drive motor 21 may be provided.

[0035] Other characteristic parts will be described.

[0036] When starting the hulling operation with the hulling roll 3, by increasing the rotation speed of the main motor 19, the rotation speed of the hulling roll 3 can be increased to improve the dehusking rate, and the early stabilization of the initial working state can be achieved.

[0037] An air volume sensor 37 is provided in the dust exhaust pipe 36, and when the air volume sensor 37 detects a reduction in the air volume, the suction fan drive motor 33 is driven to reduce the rotation speed of the chaff screw 8.

[0038] The hulling and sorting machine A and the rice sorting machine B can be configured to communicate, and the swing drive motor 31 can be controlled to change the swing rotation speed of the swing sorting plate 13 according to the efficiency of the rice sorting machine B. Alternatively, the main motor 9 can be controlled.

[0039] When the millet load cell 40 detects that the amount of millet sorted by the sorting cylinder 43 of the rice sorting machine B is relatively large per unit time or efficiency, the gap between the hulling rolls 3 can be controlled to be slightly closed. Since it is often difficult to increase the dehusking rate when there is a lot of millet (green rice), appropriate countermeasures can be taken.

[0040] A transformer (not shown) is provided between the main power supply and the primary side of the electromagnetic contactor (not shown) of the hulling and sorting machine A, and the power supply of the controller C and various motors are driven by a 200V power supply stepped down by the transformer, and the secondary side of the electromagnetic contactor is connected to a 400V specification main motor to configure.

[0041] When starting with the gap setting of the husk folding roll 3 in the state of wheat, that is, with a gap that does not allow the material between the rolls to be discharged, the rotation speed of the sorting cylinder 43 of the rice sorter B is switched to that for wheat (for example, the high rotation side).

[0042] However, when the gap adjustment switch 42 for the husk folding roll performs a closing operation on the gap of the husk folding roll 3, the rotation speed of the sorting cylinder 43 of the rice sorter B is returned from that for wheat to that for rice (for example, the low rotation side).

Explanation of reference signs

[0043] 3 Husk folding roll 7 Screw for mixed rice 13 Oscillating sorting plate 14 Brown rice partition plate

Claims

1. In a rice hulling and sorting machine comprising a rice hulling section for hulling rice, a conveying section for conveying a mixture of rice hulled in the rice hulling section and brown rice, and a swing sorting plate for swing sorting the mixture conveyed by the conveying section, a rice hulling and sorting machine characterized by being provided with a change adjustment section capable of changing the driving rotation speed of the conveying section.

2. a partition plate is provided for partitioning the finished brown rice sorted by the swing sorting plate and the mixed rice, the rice hulling and sorting machine according to claim 1, characterized in that the driving rotation speed of the conveying section is increased as the partition plate is moved to the high efficiency side, and the driving rotation speed of the conveying section is decreased as the partition plate is moved to the low efficiency side.

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