JPH04150953A - Operation control device for grain drying conditioner - Google Patents

Abstract

PURPOSE:To prevent the wasteful operation of a discharge and transfer apparatus by a method wherein the interruption of the grain dehulling state in a huller is detected when the full load state of grain is continuously detected by a full load state sensor even after a predetermined time is elapsed from the point of time when a dryer is controlled so as to be stopped to control the discharge and transfer apparatus so as to stop the same. CONSTITUTION:A grain full load state sensor 5 detecting the full load state of the grain supplied to a storage tank 3 and a grain presence sensor 6 detecting the presence state of the grain in the tank 3 are provided. A dryer 1 during the discharge of grain is controlled so as to be stopped on the basis of the detection of the full load state of grain by the sensor 5 and the dryer 1 discharging grain is controlled so as to be started on the basis of the detection of the grain absence state by the sensor 6. When the full load state of the grain is continuously detected by the sensor 5 even after a predetermined time is elapsed from the point of time when the dryer 1 during the discharge of the grain is controlled so as to be stopped on the basis of the full load state of the grain by the sensor 5, it is detected that the dehulling work of the grain is interrupted in a huller 4 and a discharge and transfer apparatus 2 is controlled so as to be stopped. As a result, the wasteful operation of the discharge and transfer apparatus 2 can be prevented.

Description

[Detailed description of the invention] Regarding.

Conventional technology Conventionally, dried grains that are sequentially discharged from a plurality of flour dryers that dry grains are transferred and discharged by a discharge transfer device to a grain storage tank that stores the grains, and from this storage tank. A grain fullness sensor is provided to detect the fullness of the grains supplied to the huller that husks the grains and also to the storage tank. A grain presence/absence sensor that automatically stops and controls the dryer during grain discharge and the discharge transfer device during grain transfer by detecting the quantity state, and also detects the presence/absence of grain in the storage tank. established,
This is an operation control system in which the dryer and the discharge transfer device are started when the presence/absence sensor detects the absence of grains, and the fullness sensor continuously detects the fullness of grains for a predetermined period of time or more. However, the system did not provide any special operational control.

Problems to be Solved by the Invention For example, when a flour dryer is used to both dry grains with hot air and leave dried grains to cool, there is no need to enter the drying chamber provided at the bottom of the dryer. The stored grains are exposed to the hot air and dried by passing through the drying chamber while the circulation of flowing down the drying chamber is repeated.When the drying is completed, the dried grains are The grains are transferred and supplied into a cooling chamber provided at the top of the dryer and left to cool. When the cooling is finished, the cooled grains are sequentially discharged from each drying rack into the discharge and transfer device. From there, the grains are transferred and discharged into a grain storage tank, where they are stored. From this storage tank, the grains are supplied into a hulling machine, where the grains are stripped and separated into rice husks and brown rice, and then discharged outside the machine. Ru.

During this series of operations, when the grain full sensor installed in the storage tank detects that the storage tank is full of grains, this detection causes the dryer to The discharge transfer device during grain transfer is automatically controlled to stop, and when the grain presence sensor installed in the storage tank detects that there are no grains in the storage tank, this detection The dryer for discharging grains and the discharging and transferring device for transporting grains are automatically started and controlled.

During this series of operations, the dryer In addition, when the hulling operation is interrupted, the discharge transfer device is also controlled to stop in the same way as the dryer, thereby eliminating unnecessary operation.

Means for Solving the Problems This invention provides a method for transferring dried grains sequentially discharged from a plurality of flour dryers 1 for drying grains to a grain storage tank 3 for storing the grains by a discharge transfer device 2. A grain fullness sensor is provided to transport and supply the grains from the storage tank 3 to the huller 4 for husking the grains, and to detect the full state of the grains supplied into the storage tank 3. 5 and a grain presence/absence sensor 6 for detecting the presence or absence of grains in the storage tank 3, and the dryer 1 is discharging grains based on the detection of the fullness of grains by the fullness sensor 5. The dryer 1 which is discharging grains is controlled to stop based on the presence/absence sensor 5 detecting the full state of grains, and the dryer 1 is controlled to stop even after a predetermined period of time has elapsed. When the amount sensor 5 continues to detect a full state of grains, it is detected that the operation of shedding grains by the huller 4 is interrupted, and the discharge transfer device 2 is controlled to stop. The configuration of the operation control method is characterized by the following.

Effect of the invention The grains stored in the drying chamber at the bottom of the flour dryer l are
As the circulation of flowing down the drying chamber is repeated, the hot air passes through the drying chamber, and is exposed to the hot air and dried. When the drying is completed, the dried grains are exposed to the air at the top of the dryer. The grains are transferred to a cold room and left to cool. When the cooling is finished, the cooled grains are sequentially discharged from each dryer 1 into a discharge transfer device 2, and from this discharge transfer device 2 to a grain storage tank. The grains are transferred and discharged into a tank 3 and stored, and supplied from this storage tank 3 to a huller 4, where the grains are stripped and separated into rice husks and brown rice, and then discharged outside the machine. Ru.

During this series of operations, when the grain full sensor 5 in the storage tank 3 detects that the storage tank 3 is full of grains, this detection causes the dryer to 1
is automatically stopped, and when the grain presence sensor 6 in the storage tank 3 detects that there are no grains in the storage tank 3, the dryer discharges the grains based on this detection. 1 is automatically started and controlled.

Further, when the full capacity sensor 5 in the storage tank 3 detects that the storage tank 3 is full of grains for a predetermined period of time, the hulling operation in the hulling machine 4 is interrupted. Upon this detection, the dryer 1 and the discharge transfer device 2 are automatically controlled to stop, and the discharge and transfer of grains is stopped.

Effects of the Invention According to the present invention, depending on the detection duration when the grain fullness sensor 5 detects grains, it is possible to determine whether the huller 4 is in suspension of operation or the grain storage tank 3 is out of grains. is detected,
Depending on these detection states, only the grain dryer 1 is controlled to start and stop, and the supply of grains to the storage tank 3 is controlled, or both the dried ml and the discharge transfer device 2 are stopped. Due to the control, the discharge transfer device 2 is not operated in a wasteful manner, and during the hulling operation with the huller 4, the discharge transfer device 2 is always under drive control. , grain transfer is ensured.

Example Hereinafter, one embodiment of the present invention will be described based on the drawings.

On the ward side, there are a plurality of machines for drying grains, for example, four grain dryers 1, grain storage tanks 3, 3 for storing grains on either side, and a huller for hulling grains. 4, and the other side is provided with a stake hoist 8 having a stake hopper 7 at the bottom for receiving grain, and the rear side of the dryer 1 is supplied with grain from the stake hoist 8. A tension transfer device 10 rotatably equipped with a tension transfer spiral 9 for receiving grains, transferring the grains to each dryer 1 for tensioning, and discharging the grains from each dryer 1 is provided. A discharge transfer spiral 1 that receives dried grains and transfers and discharges the grains to a discharge hopper 12 provided at the bottom of a discharge hoist 11.
3 is rotatably installed inside the dryer 1, a huller 4, storage tanks 3, 3, a tensioning transfer device 10, and a discharge transfer device 1. This cooling section has a cooling chamber 16 at the top.
An upper grain collection gutter 17°17 is provided below this cooling room 16.
The bottom plates of the upper grain collecting troughs 17, 17 are configured to open and close, and a storage chamber 18 for the drying section is provided below the upper grain collecting trough 17. Drying room 1
9 are provided, and a lower grain collecting trough 2 is installed below each drying room 19.
o is provided for communication.

An upper transfer gutter 21 is provided above the cooling chamber 16, and a lower transfer gutter 22 is provided between the upper grain collection gutter 17.

A burner case 24 containing a burner 23 that generates hot air, a display device 25 for displaying data, and an operating device 26 for operating the dryer 1 are provided on the outer surface of the front wall of each dryer 1. There is also an exhaust fan 27 on the outside of the rear wall.
A circulating grain raising machine 29 is provided on the rear outer side of the machine wall, and a dispensing cylinder 3o is provided at the upper end, and one side of the dispensing cylinder 3o and the corresponding The starting end of the upper transfer gutter 21 is communicated with, and the other side of the dispensing tube 3o and the starting end of the lower transfer gutter 22 are communicated via the flow tube 31, and the lower end and the terminal end of the lower grain collecting gutter 2o are communicated with each other. A supply gutter 32 is provided between the grain raising machine 29 and a moisture sensor 33 for detecting grain moisture.

In the upper portions of the cooling chamber 16 and the storage chamber 18, fullness sensors 34 for detecting the fullness of grains are provided. At the bottom of
The structure includes a paddy presence/absence sensor 35 that detects the presence or absence of grains.

The grains in the cooling chamber 16 of the dryer 1 flow down from the cooling chamber 16 through the upper grain collecting troughs 17, 17, the storage chamber 18, and each of the drying chambers 19 to the lower grain collecting trough. 20 to the circulation raising machine 29, conveyed to the upper part by an internal packet conveyor, supplied from the dispensing cylinder 30 to the upper transfer gutter 21, and distributed into the cooling chamber 16. Double drying that is repeated and drying, and the storage chamber 1
The grains in 8 flow down from the storage chamber 18 through the respective drying chambers 19, are supplied from the lower grain collecting trough 20 to the circulation grain raiser 29, are conveyed to the upper part, and are transported to the upper part of the grain raising machine 29. Downflow tube 31
The configuration is such that single drying is performed in which circulation is repeated where the material is diffused and supplied into the storage chamber 18 through the lower transfer gutter 22.

When the dried grains are left to cool, they are supplied into the cooling chamber 16 in the same grain circulation process as in the double drying described above, and are allowed to cool in the cooling chamber 16.

The upper part of the storage tank 3.3 includes this storage tank 3.3.
a grain fullness sensor 5 for detecting the fullness of grains by receiving the supply of grains transferred and discharged from the discharge transfer device 2 into the interior of the grain storage device 3;
, 5, and a grain presence/absence sensor 6.6 for detecting the presence/absence of grain in the storage tanks 3, 3 is provided at the bottom, and a display device for displaying data is provided on the outer wall plate of the storage tank 3. 25, and a paddy shutter 37.37 that can be opened and closed by a tank motor 36.36 that rotates in forward and reverse directions is provided at the bottom of the storage tank 3.3.
The structure includes a shirt shirt open sensor 36' and a shirt shirt closed sensor 37' for detecting the open/closed state of the shirt shirt 7.

The rice huller 4 is installed below the storage tanks 3, 3, receives the grains supplied from the storage tanks 3, 3, dehulls the rice grains, wind-sorts them into rice husks and brown rice, and removes the rice husks using an exhaust machine. (not shown), and the brown rice is fried using a grain hoist (not shown), etc., and then discharged to a brown rice storage tank (not shown), etc.

The huller 4 is provided with a huller tank (not shown), and the dried grains are directly transferred and discharged from the discharge transfer device 2 into the huller tank. The structure includes the full amount sensor 5 that detects the full amount of grains supplied into the hulling machine tank, and the presence/absence sensor 6 that detects the presence or absence of grains in the hulling machine tank. The dryer 1 and the discharge transfer device 2 may be controlled to start and stop based on detection by the full amount sensor 5 and the presence/absence sensor 6.

In the stake raising machine 8, grains are conveyed to the upper part by a packet conveyor provided inside, and are discharged into the stake transfer device 10 through a stake delivery tube 38 and a stake flow lower tube 39. It is configured to be transferred by the tensioning transfer spiral 9 in the tensioning transfer device IO and tensioned into each of the dryers 1. It has a configuration in which a paddy rice filling flow sensor 40 is provided to detect grains passing through the container.

In the discharge raising machine 11, the grains are conveyed to the upper part by a packet conveyor provided inside, and are supplied into the storage tank 3 on one side through a discharge discharge tube 41 and a discharge flow lower tube 42 on one side. When the storage tank 3 on one side becomes full, the storage tank 3 on the other side is switched to the storage tank 3 on the other side. It has a configuration in which a discharge paddy flow sensor 43 is provided to detect passing grains, and a switching valve 43' that can be freely rotated by a switching motor 42' that rotates in forward and reverse directions is provided in this discharge dumping tube 41. It is said that

The box-shaped surface plate of the central operating device 14 includes a digital display section 44 that digitally displays the machine in operation, start switches 45 that start the dryer 1 for each of loading, drying, and discharging operations. A stop switch 46 for stopping operation, a selection switch 47, 47 for selecting the machine for the sending side for pre-work and a receiving side for post-work, a setting switch 48 for setting double drying or single drying, and reading out information. an information readout switch 49, the tension transfer device 10 of the transfer system,
An on switch 5 for manually starting and stopping the discharge transfer device 2, the pitching grain hoist 8, and the discharge grain hoist 11;
0, off switch 51, transfer system auto setting switch 52
, a storage setting switch 53 that sets the storage tank 3 to double or single, and an open switch 5 that manually opens and closes the paddy shutter 37.37 of the storage tank 3.3.
4. The configuration includes a close switch 55 and an operation monitor lamp 56, and the machine selected and set by operating the selection switch 47, 47 is displayed on the digital display section 44.

The operation monitor lamp 56 indicates double drying or single drying of each of the dryers 1, indicates the operation of each of the cooling sections and each of the drying sections, indicates abnormality and the presence or absence of paddy, and indicates the discharge and transfer device 2, the tension Indication of operation and abnormality of the loading transfer device 10, the discharging grain raising machine 11, and the pitching grain raising machine 8, the open state of the paddy shutters 37, 37 of the storage tanks 3, 3, and the full grain state It is configured to display the presence or absence of paddy.

Also, a microcomputer 57 is provided inside the central operating device 14, and various operations and various detected values are input to the microcomputer 57, and each part is controlled by this input. .

Control by the microcomputer 57 is performed as follows. That is, as shown in FIG. 3 (during the discharge operation, when the discharge start switch 45 is operated to start the discharge operation, this operation is input, and this input causes the discharge transfer device 2 and the discharge grain raising machine 11 to be operated). When the operating output of the operating dryer 1 is turned on and the presence/absence sensor 6 detects and inputs that there are no grains in the storage tank 3, this input turns on the discharge output of the operating dryer 1. The structure is such that grains are discharged from this dryer 1.

When the storage tank 3 is full of grains, the full amount sensor 5 detects and receives an input, and this input turns on the stop output of the operating dryer 1, causing the dryer 1 to The structure is such that the discharge of grains is stopped.

Even after a predetermined period of time has passed since the discharge of grains from the dryer 1 is controlled to stop, the full amount sensor 5 continues to detect and input that the storage tank 3 is full of grains. Then, due to this input, it is detected that the grain is not supplied to the hulling machine 4 and the hulling operation is interrupted in the hulling machine 4, and this detection causes the exhaust pressure transfer device 2 to The operation output is turned off and the discharge transfer device 2 is controlled to stop, and this midway stop indication (discharge interruption) is displayed on the display device 25. Further, 60 is a discharge transfer motor, and 61 is a discharge grain hoist motor.

As shown in FIG. 4, when performing stakeout work, select the dryer 1 to be staked out and operate the stakeout start switch 45 to start the stakeout work. The tensioning output of the running dryer 1 is turned on, the operating information of the running dryer 1 is read, and when no abnormality is detected and input, this input causes the tensioning grain raising machine 8 and the The structure is such that the operation output of the loading transfer device 10 is turned on and grains are loaded into the dryer 1.

When the full capacity sensor 34 detects and inputs that the staking has been completed, this input turns off the operating outputs of the staking machine 8 and the staking transfer device 1o, and turns off the operation output of the staking dryer l. The stop output is turned on, the operation information of the dryer 1 is read, and when no abnormality is detected and input, a tensioning completion indication is displayed on the display device 25 in response to this input. When the presence of an abnormality is detected and input, the abnormality of the operating dryer 1 is displayed on the display device 25 by this input. Note that the same control as described above is performed during the drying operation and the discharge operation.

As shown in FIG. 5, the abnormality processing during the tensioning operation is carried out by reading the operation information of the dryer 1, and when no abnormality is detected and input, this input causes the tensioning transfer device 1 to
The OCR of the tension transfer motor 58 of 0 is read,
When no abnormality is detected and input, this input causes the OCR reading of the tensioning grain raising motor 59 of the grain raising machine 8 to be performed, and when an abnormality is detected and input, this input causes The display device 25 indicates an abnormality in the rising grain ta8.
is displayed, the operating output of the grain hoisting machine 8 is turned off,
When the operation information of the dryer 1 is read and no abnormality is detected and input, the OCR of the tension transfer motor 58 of the tension transfer device 10 is read based on this input, and if no abnormality is detected, the OCR of the tension transfer motor 58 of the tension transfer device 10 is read. When "absence" is detected and input, the elapse of a predetermined time from this input is detected and input, and this input turns off the operating output of the tensioning transfer device 10 and turns on the stop output of the operating dryer 1. The configuration is such that

When the operating information of the operating dryer 1 is detected as having an abnormality and is input, this input causes the abnormality of the operating dryer ta1 to be displayed on the display device 25, and the arranging grain raising machine 8 and the arranging transfer The configuration is such that the operating output of the device 10 is turned off.

OC of the tensioning transfer motor 58 of the tensioning transfer device 10
When the reading of R is detected as abnormal and is input, this input indicates that the abnormality of the tensioning and transferring device 10 is detected on the display device 2.
5 is displayed, the operating output of the tension transfer device 10 and the tension raising machine 8 is turned off, the operation information of the operating dryer 1 is read, and no abnormality is detected and input. When it is detected that a predetermined time has elapsed since the input, the stop output of the operating dryer 1 is turned ON by this input. Also, when the presence of an abnormality in the operating dryer 1 is detected and input, the abnormality in the operating dryer 1 is displayed on the display device 25 in the same manner as above, and the The configuration is such that the operating output of the transfer bag ff1lO is turned off.

As shown in FIG. 6, the control of the paddy shutter 37 is performed by operating the open switch 54, which is input, and this input turns on the close output of the paddy shutter 37, and reads the shutter open sensor 36'. is performed, and when the ON state of the shutter open sensor 36' is detected and input, this input turns off the close output of the rice shutter 37, and the close switch 37' is not operated, but this operation is input. If not, the paddy presence/absence sensor 6 in the storage tank 3 is read, and when the absence of grains is detected and input, the input causes no grains to be displayed on the display device 25, and the paddy shutter is activated. 37 is turned ON, the shutter shutter closing sensor 37' is read, and when the ON of the shirt shutter closing sensor 37' is detected and input, the closing output of the paddy shutter 37 is turned OFF by this input. The structure is as follows.

When the OFF state of the shutter open sensor 36' is detected and inputted, when the elapse of a predetermined time is detected and inputted from this input, the close output of the paddy shutter 37 is turned off by this input, and the paddy shutter is closed. The opening abnormality of No. 37 is displayed on the display device 25. Further, when the OFF state of the shutter open sensor 37' is detected and inputted, when the elapse of a predetermined time is detected and inputted from this input, the close output of the paddy shutter 37 is turned off by this input, and the paddy shutter is closed. 37 is displayed on the display bag fi25.

As shown in FIG. 7, when an abnormality occurs in the dryer 1 while grain is being loaded into the dryer 1,
The operating device 26 is configured to perform abnormality detection and stop processing, and the contents thereof are transmitted to the central operating device 14 as operating information of the dryer 1.

The received data of operating information is read, this operating information is updated and stored in the memory, and when an abnormality is detected and input, the abnormality display of the operating dryer 1 is displayed on the display device due to this input. 25, the display is canceled while the dryer 1 is in operation, the output of the grain raising machine 8 is stopped, and the display is canceled while the grain raising machine 8 is in operation, and the display is canceled while the dryer 1 is in operation. The output of 10 is stopped and the display is canceled while this loading and transferring device IO is in operation.

Hereinafter, the operation of the above embodiment will be explained.

When drying the grains loaded into the flour dryer l, the selection switch 47, setting switch 48, and auto setting switch 52 of the central operating device 14 are operated to predetermined positions, and the start switch 45 starts the drying operation. By operating the dryer 1, each part of the dryer 1, the burner 23, the moisture sensor 33, etc. are started, and the burner 23 generates hot air.

This hot air passes through each drying chamber 19 and is sucked and exhausted by the exhaust fan '27, so that the grains stored in the storage chamber 18 flow down from this storage chamber 18 into each drying chamber 19. The grains are exposed to this hot air and dried, flow down to the lower part, and are transferred and supplied from the lower grain collection gutter 20 through the supply gutter 32 into the circulation grain raising machine 29, where they are conveyed to the upper part. ,
It is supplied from the dispensing tube 30 to the lower transfer gutter 22 via the downflow tube 31, and from this lower transfer gutter 22 it is transferred and supplied onto the diffusion plate, where it is evenly diffused and reduced into the storage chamber 18 and circulated. When the grain is dried and the moisture sensor 33 detects the same grain moisture as the finishing target moisture, the microcomputer 57 of the central operating device 14 automatically controls the drying, and the dried grain is conveyed to the upper part by the circulation raising machine 29. The water is supplied from the dispensing tube 30 into the upper transfer gutter 21, from the upper transfer gutter 21 onto the upper diffusion plate, and evenly distributed into the cooling chamber 16 by the upper diffusion plate. The dried grains are left to cool in the cooling room 16.

When discharging cooled grains, the selection switch 47 and the setting switch 48 of the central operation bag [14]
and operating the auto setting switch 52 to a predetermined position,
By operating the start switch 45 that starts the discharge operation, each part of the dryer 1, the discharge transfer device 2, the discharge grain raiser 11, the grain storage tank 3, etc. are started.

The cooled grains in the cooling chamber 16 of the dryer 1 are supplied from the cooling chamber 16 to the discharge transfer device 2 via the lower grain collection gutter 20, 20, and from the discharge transfer device 2 to the discharge transfer device 2. The grain is discharged into the discharge hopper 12 of the discharge raising machine 11, and this discharge raising machine 1
1, the discharge tube 41 and the discharge flow tube 4 are conveyed to the upper part.
2 and into the storage tank 3, and when the storage tank 3.3 is full of grains, the grain fullness sensor 55
When detected, the dry 8f! 1 is automatically stopped to stop discharging grains, and the paddy shutter 37 is connected to the tank motor 36.
The grains in this storage tank 3 are controlled to be in an open state by
The rice is sequentially supplied into the huller I14 and removed, and the rice huller 4
The rice is sorted into rice husks and brown rice, and then discharged outside the machine.

When there are no grains in the storage tank 3, when the grain presence/absence sensor 6 detects this absence, the paddy shutter 37 is controlled to be closed by the tank motor 36, and the dryer 1 is also turned on again. Under startup control, grains are discharged from the dryer 1 into the storage tank 3 via the discharge transfer gutter 2, the discharge grain raiser 11, and the like.

During this series of operations, even if a predetermined period of time elapses after the full amount sensor 5 detects that the grains are full, the full amount sensor 5 detects that the storage tank 3 is full of grains. If it is continuously detected that the huller 4 is present, it is detected that the grains are not shed by the huller 4 and the hulling operation is interrupted. The discharging grain raising machine 11 and the like are also controlled to stop discharging grains.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a system configuration diagram of a grain conditioning processing device that can be partially broken, Fig. 2 is a block diagram, Figs. 3 to 7 are flowcharts, and Fig. Figure 8 is an overall side view of the flour dryer, and Figure 9 is A-A in Figure 8.
The sectional view, FIG. 10, is an enlarged front view of the central operating device. Explanation of symbols 1 Flour dryer 3 Grain storage tank 5 Grain fullness sensor Discharge transfer device Hulling machine Grain presence/absence sensor Applicant's name Machine Water Co., Ltd. 1) Eihisa Patent Representative Izuiseki Agriculture Figure 3 Figure 4 Figure G Figure 711 Figure 8

Claims (1)

[Claims] Dried grains sequentially discharged from a plurality of flour dryers 1 for drying grain flour are transferred and supplied to a flour storage tank 3 for storing grain flour by a discharge transfer device 2, and the flour is husked from the storage tank 3. A grain fullness sensor 5 is provided to supply flour to the sliding machine 4 and detects the full state of flour supplied into the storage tank 3, and a flour presence/absence sensor 5 is provided to detect the presence or absence of grain in the storage tank 3. A sensor 6 is provided, and the dryer 1 which is discharging grains is stopped and controlled based on the full state of flour detected by the full amount sensor 5, and the dryer 1 is controlled to stop discharging grains based on the state of no grains detected by the presence/absence sensor 6. In the grain drying adjustment device that starts and controls the dryer 1 that discharges grain flour, the full amount sensor 5 controls the dryer 1 that is discharging grains to stop based on the detection of the full state of grain flour, and controls the dryer 1 for a predetermined period of time. If the full amount sensor 5 continues to detect the full amount of flour after the elapse of time, it detects that the husking operation of the flour in the huller 4 has been interrupted, and the discharge transfer device 2 is activated. An operation control method for a grain drying adjustment device characterized by stop control.