JP6347131B2 - Grain dryer - Google Patents

Description

  The present invention relates to a grain dryer.

Patent Document 1 below discloses a grain dryer in which a dust exhauster that sucks dust in the dryer is arranged in an upper spiral basket portion of a ceiling portion of the dryer.
Patent Document 2 below discloses a grain dryer that is provided with a pressure sensor in a drying chamber to prevent forgetting to close the inspection window.

Japanese Patent No. 3687157 JP-A-63-34482

  In the grain dryer described in Patent Document 1, a dust exhauster that sucks dust in the dryer is arranged on the ceiling of the grain dryer, but the dust exhauster sucks a large amount of dust outside the dryer. It is a structure for discharging, and it is inevitable that the dust discharging performance becomes weaker as the dust is sucked. However, no consideration is given to the suction performance of the dust remover.

  Then, the subject of this invention is providing the grain dryer which can continue a favorable driving | operation, always monitoring the suction state of a dust collector.

The problems of the present invention are solved by the following means.
The invention described in claim 1 includes a dust remover (24) having a storage chamber (2) and a drying chamber (5) in the box, and having a dust discharge fan (21) on the ceiling (10) of the box, The pressure sensor (29) for detecting the pressure in the dust remover (24) is provided, and the suction air that the pressure sensor (29) of the dust remover (24) passes through the dust remover (24) during the drying operation. If it is detected that the pressure in the tank is abnormal, a control device is provided that can provide control to continue the drying operation even if the notification device (36) is in operation. A grain dryer characterized by comprising an apparatus (50) and temporarily operating a dust exhaust fan (21) during a tensioning operation to detect whether the dust exhauster (24) is normal .

  The invention described in claim 2 is characterized in that the control device (50) has a control structure for stopping the tensioning operation when the pressure sensor (29) detects an abnormality at the start of the tensioning operation of the drying operation. The grain dryer according to 1.

According to a third aspect of the invention, in claim 1 or 2, characterized by providing a pressure sensor (29) and suction hose (31) to a suction duct sucking air by dust-exhaust fan (21) passes (26) The grain dryer described.

When the pressure sensor (29) of the dust remover (24) detects an abnormality in the pressure of the suction air passing through the dust remover (24) during the drying operation, the alarm ( 36) informs of the abnormality, and can continue the drying operation while notifying, so that the grain drying operation is not hindered. Of course, when the alarm (36) informs the abnormality, the drying operation can be stopped by the operation of the operator.
Further, according to the first aspect of the present invention, it is possible to detect in advance whether or not the dust discharger (24) is normal during the grain loading operation, and the dust discharger (24) is not operated at all times so Do not suck.

According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, it is possible to prevent the grains from being stuck in the dryer in a state where the suction capacity of the dust exhauster (24) is insufficient. Can do .

In the invention according to claim 3 , in addition to the effect of the invention according to claim 1 or 2 , since the pressure sensor (29) is installed in the suction duct (26), the pressure sensor (29) is exposed to the suction air. Since there is no pressure, the pressure can be determined with certainty.

1 is an overall front view of a grain dryer according to an embodiment of the present invention. It is the whole grain dryer rear view of the Example of this invention seen from the opposite side to FIG. It is an AA sectional view taken on the line of the grain dryer of FIG. It is a top view (Drawing 4 (a)) and a side view (Drawing 4 (b)) of a dust discharger of a grain dryer of Drawing 1. It is an operation panel of the grain dryer of FIG. It is a drive mechanism figure of the grain dryer of FIG. It is a control block diagram of the grain dryer of FIG. It is a flowchart of the operation control of the grain dryer of FIG. It is a flowchart of the operation control of the grain dryer of FIG. It is a flowchart of the operation control of the grain dryer of FIG.

Embodiments of the present invention will be described with reference to the drawings.
FIGS. 1 and 2 are perspective views showing the appearance of the grain dryer according to the present embodiment from opposite directions, respectively. FIG. 3 is a cross-sectional view taken along the line AA in the grain dryer of FIG. Yes, showing the internal structure of the dryer.

  In the dryer, a storage chamber 2, an exhaust air chamber 3, a hot air chamber 4, and a grain collection chamber 6 are stacked in order from above, and an elevator 16 is arranged outside the wall surface of the dryer. The exhaust air chamber 3 and the hot air chamber 4 may be collectively referred to as a drying chamber 5.

  Between the wall 8 which partitions the exhaust air chamber 3 and the hot air chamber 4, the grain flow path 9 in which a funnel-shaped grain falls from upper direction toward the downward direction is formed, and while falling down this grain flow path 9 The grain is dried indirectly with hot air.

  Accordingly, the grain in the storage chamber 2 is dried in the grain flow path 9 between the exhaust air chamber 3 and the hot air chamber 4 in the process of falling downward from the ceiling 10. At this time, the grains are easily dried by falling while spreading over the entire horizontal section in the storage chamber 2 by the diffusion blades 35 (FIG. 6) provided on the ceiling portion 10 in the storage chamber 2.

  The dried grain is collected at the lower end of the grain flow path 9 and is collected in the grain collection room 6 via the rotary valve 38 provided at the lower end of the grain flow path 9. The lower conveyor 39 provided at the lower part of the dryer is extracted to the elevator 16 outside the dryer, transported to the ceiling 10 side of the dryer, and again stored by the upper spiral 23 provided on the ceiling 10. It falls from 2 downward.

Moreover, the sticking sensor 12 is arrange | positioned in the appropriate place in the storage chamber 2, and the sticking grain amount can be detected suitably.
In addition, exhaust air is discharged | emitted from the exhaust duct 14 outside by the fan 13 (refer FIG. 2) which act | operates with the motor which is not shown in figure from the exhaust chamber 3 in dryer. Further, an automatic moisture meter 17 is disposed at a proper position of the elevator 16, and a far-infrared radiator 19 is provided as a heat source for supplying hot air to the hot air chamber 4 next to the elevator 16, and the dryer is disposed above the heat source. A controller 50 (FIG. 7) that performs drive control is provided.

  In addition, a dust remover 24 is disposed on the upper spiral rod 22 that covers the upper spiral 23 disposed on the ceiling 10 of the dryer, and dust in the dryer and the upper spiral rod 22 is sucked by the dust remover 24. And is discharged from the dust discharge duct 25 to the outside.

  More specifically, the dust remover 24 connects the suction duct 26 to the upper spiral rod 22. As shown in the plan view of FIG. 4A and the side view of FIG. 4B, the dust remover 24 includes a dust removal motor 27, a dust discharge fan 21 that operates with the dust removal motor 27, and a pressure sensor 29. Is arranged. The pressure sensor 29 is provided outside the suction duct 26 constituting the dust exhauster 24, and a pipe 31 having one end communicating with the inside of the suction duct 26 and the other end connected to the pressure sensor 29 is connected. As the atmospheric pressure in the suction duct 26 is guided to the pressure sensor 29 via, the pressure in the dust exhauster 24 can be detected.

  FIG. 5 shows an operation panel 32 of the grain dryer of this embodiment. Cereal tension button 33a, ventilation button 33b, drying 33c, discharge button 33d, and stop button 33e are arranged in parallel, and each button 33a to 33e can be operated. The hot air temperature, moisture, and remaining time can be displayed on the liquid crystal screen 34, and the emergency stop button 35 can be used to stop the dryer.

  In addition, there are provided buttons 45a and 45b for setting the drying pause time, setting of the timer and setting of the amount of sticking and the amount of moisture, and an increase button 45c and a decrease button 45d for increasing and decreasing the buttons 45a, 45b The setting value by 45d is displayed on the liquid crystal screen 34.

  FIG. 6 shows a drive mechanism of the grain dryer, and FIG. 7 shows a control mechanism of the grain dryer in a block diagram. A fan 37 shown in FIG. 6 sucks hot air that has passed through the hot air chamber 4 through the exhaust air chamber 3 and discharges it as exhaust air outside the apparatus.

8 to 10 show flowcharts for operation control of the grain dryer of this embodiment.
First, the tension switch (button) 33a is pushed to prepare for the operation of the dryer (S1). First, it is checked whether there is an abnormality in the operation history of the dust remover 24 in the previous operation of the grain dryer (S2). If there is an abnormality in the operation history of the dust remover 24 in the above check, the grain dryer is stopped (S6). If there is no abnormality in the operation of the dust remover 24 in the above check, the elevator 16, the upper spiral 23 and the diffusion blade 35 are activated, and the dust remover 24 is simultaneously activated (S3).

  Next, it is checked whether there is any abnormality in the operation of the dust remover 24 (S4). Regarding the operation of the dust remover 24, if there is a pressure drop of the pressure sensor 29 in the dust remover 24, it is determined that there is an abnormality in the dust remover 24, and the sticking operation is stopped (S6). When there is no abnormality in the operation of the dust remover 24, the dust remover 24 is stopped so as not to suck the grains during the tensioning (S5).

  The dust exhauster 24 can be inspected as follows. For example, it is possible to detect whether the pressure sensor 29 is normal or abnormal by providing an inspection mode in which only the dust discharger 24 operates when the discharge button 33d and the ventilation button 33b are simultaneously turned on.

  Next, the presence or absence of grain is detected by the moisture meter 17 (see FIG. 6) attached to the elevator 16 (S7). The detection of the grain by the moisture meter 17 is performed based on the detected current value by the moisture meter 17. When the moisture meter 17 does not detect the grain, it means that there is no grain in the elevator 16, so the operation of the elevator 16, the upper spiral 23 and the diffusion blade 35 is stopped (S 8). The drying operation conditions are set (S9). The grain drying operation condition is to set a target moisture value (for example, 14.5% by the moisture setting switch 45b) and a drying speed (performed by the drying rate switch 46) (S9).

  Next, the drying switch 33c is turned on (S10), and the drying operation is started (S11). Here, when the detected pressure of the pressure sensor 29 that is always operating decreases and enters the range of abnormality (S12), the abnormality is notified by the alarm device 36, and the abnormality is stored in the memory in the control device as a history. 47 (S14). However, the drying operation continues even when the abnormality is notified (S13). When the target grain moisture value is obtained (S15), the drying operation is stopped (S16).

  When the grain is dried, the discharge switch 33d is turned on (S17), and when the rotary valve 38, the lower spiral 39, the elevator 16 and the dust collector 24 are started, the discharge shutter provided on the top of the elevator 16 40 (FIG. 1) switches to the discharge side, passes through the discharge pipe 42, and the grain is discharged from the dryer (S18).

  When it is detected by the amount sensor 12 that the amount of grain in the dryer is lowered from the set value due to the discharge of the grain from the dryer (S19), the dust remover 24 is turned off (S20). When the moisture meter 17 installed in the elevator 16 detects that there is no grain (S21), the rotary valve 38, the lower spiral 39 and the elevator 16 are turned off (S22), and the grain drying operation is terminated.

  Next, in step 9, when the setting amount switch 45a suitable for drying a small amount of grain is turned on, or when a small amount of grain is detected by the tension amount sensor 12, a small amount of grain below the set amount (for example, 1 ton or less) is determined to be performed, and the drying switch 33c is turned on (S23) to start the drying operation, but the dust remover 24 continues the drying operation in the off state (S24).

  Next, it is detected whether the pressure sensor 29 is equal to or lower than the set suction pressure (S25). In this case, since the dust sensor 24 is turned off, the pressure sensor 29 should not detect the pressure, but in the case of a small amount of grain, the grain layer cannot cover the entire hot air chamber 4, A part of the hot air may pass through the storage chamber 2 without passing through the grain layer and enter the dust remover 24, and the pressure sensor 29 may detect the pressure. Accordingly, when the pressure sensor 29 detects a pressure higher than the set pressure, it is determined that a small amount of grain is in the drying chamber 5, so that the drying operation and the stop are performed every set time (for example, to continue the small amount of drying) Repeat every 1 hour (S26). When the target moisture value is thus reached (S27), the drying operation is stopped (S30).

  Further, when the pressure sensor 29 detects the set pressure or lower, it is determined that a small amount of the grain inside the drying chamber 5 is covered with the amount of grain covering the entire hot air chamber 4, so that it is normally dried. The operation is shifted to the operation, and the dust remover 24 is turned on to continue the drying operation (S28). When the target moisture value is reached (S29), the drying operation is stopped (S30).

  Although the pressure sensor 29 of the present embodiment measures the suction side of the dust remover 24, it can also be provided on the discharge side.

2 Reservation chamber 3 Ventilation chamber 4 Hot air chamber 5 Drying chamber 6 Grain collection chamber 8 Wall 9 Grain channel 10 Ceiling part 12 Tension sensor 16 Elevator 17 Moisture meter 19 Far-infrared radiator 20 Electric motor 21 Fan 22 Upper spiral rod 23 Upper spiral 24 Dust collector 25 Dust exhaust duct 26 Suction duct 27 Dust exhaust motor 28 Dust exhaust fan 29 Pressure sensor 31 Pipe 33 Setting button 34 LCD screen 35 Emergency stop button 35 Diffusion blade 36 Alarm device 38 Rotary valve 39 Lower conveyor 40 Discharge Shutter 50 controller

Claims (3)

A storage chamber (2) and a drying chamber (5) are provided in the box,
A dust remover (24) having a dust exhaust fan (21) on the ceiling (10) of the box, and a pressure sensor (29) for detecting the pressure in the dust remover (24);
When the pressure sensor (29) of the dust remover (24) detects that the pressure of the suction air passing through the dust remover (24) is abnormal during the drying operation, the alarm (36) for notifying the abnormality. With
A control device (50) capable of performing control to continue the drying operation even when the alarm (36) is in operation ,
A grain dryer characterized by detecting whether or not the dust discharger (24) is normal by temporarily operating the dust discharge fan (21) during the tensioning operation .   2. The grain dryer according to claim 1, wherein the control device (50) has a control structure for stopping the tensioning operation when the pressure sensor (29) detects an abnormality at the start of the tensioning operation of the drying operation. The grain dryer according to claim 1 or 2 , wherein a pressure sensor (29) and a suction hose (31) are provided in a suction duct (26) through which suction air from the dust exhaust fan (21) passes.

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