JPH0486475A - Detecting method of grain moisture in grain dryer - Google Patents

Abstract

PURPOSE:To carry out the control of drying of grains correctly by a method wherein the moisture of grains, charged into an air-cooling chamber, or the moisture of dried grains, discharged into the air-cooling chamber, is detected by a moisture sensor to store it. CONSTITUTION:When grains are charged into a reserving chamber 1, the moisture of the grains under being charged is detected by a moisture sensor 5 and is memorized as an initial grain moisture. When the grains are dried, circulation of the grains between the reserving chamber 1 and a drying chamber 3 is repeated while the grains, flowing down through the drying chamber 3, are dried while being exposed to hot air, generated from a hot air device 4 and passing through the drying chamber 3. The moisture of grains under the drying is detected by the moisture sensor 5 and when a detected grain moisture has become same as the target moisture of finishing, a grain dryer is controlled so as to be stopped automatically whereby the drying of the grains is stopped.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a grain moisture detection method for a grain dryer.

Conventional technology Conventionally, a cooling chamber for cooling the grains, a storage chamber for storing the grains, and a drying chamber for drying the grains are provided in order from the upper side, and when the grains are loaded into the storage chambers, The grain during this tensioning is detected by a moisture sensor and stored as the initial grain moisture.

When drying the grains, the grains are repeatedly circulated from the storage chamber to the drying chamber, and the hot air from the hot air device passes through the drying chamber. The grains are dried by being exposed to this hot air, and the grain moisture during this drying is detected by a moisture sensor, and when the detected grain moisture becomes equal to the finishing target moisture, the grain dryer is automatically controlled to stop. Drying of the grain is stopped.

When the grains to be dried cannot be put into the storage chamber and remain, the remaining grains are put into the cooling chamber. While the circulation of flowing down to the storage chamber and the drying chamber is repeated and the grains are dried in the same manner as above, when the grain moisture is detected and becomes equal to the finishing target moisture, the dryer is automatically controlled to stop. , drying of the grain is stopped.

When dried grains are left to cool, the dried grains are discharged from the drying chamber into the cooling chamber and stored in the cooling chamber. It is left to cool.

As described above, the grain moisture was detected only when the grain was being loaded into the storage chamber and when the grain was being dried.

Problems to be Solved by the Invention When grains are loaded into a storage chamber, the grains being loaded are detected by a moisture sensor and stored as initial grain moisture. When drying the grains, the grains are repeatedly circulated from the storage chamber to the drying chamber, and the hot air generated from the hot air device passes through the drying chamber. The grains are dried by being exposed to this hot air, and the grain moisture during this drying is detected by the moisture sensor, and when this detected grain moisture becomes equal to the finishing target moisture, the grain dryer is automatically stopped. and the drying of the grain is stopped.

When the grains to be dried cannot be put into the storage chamber and remain, the remaining grains are put into the cooling room,
When drying the grains, the circulation from the cooling chamber to the storage chamber and the drying chamber is repeated, and while the grains are dried in the same manner as described above, the moisture content of the grains is detected and the target moisture content is reached. When it becomes the same, the dryer is automatically stopped and
Drying of the grain is stopped.

When dried grains are left to cool, the dried grains are discharged from the drying chamber into the cooling chamber and stored in the cooling chamber. It is left to cool.

As mentioned above, the water content of the grains that are put into and discharged from the cooling chamber is not detected, but this is intended to be detected.

Means for Solving the Problems This invention comprises a storage chamber 1 for storing grains, a cooling chamber 2 for cooling the grains on the upper side, and a drying chamber 3 for drying the grains on the lower side. In a grain dryer, which is provided to blow hot air from a hot air device 4 into the drying chamber 3 for drying, and is also provided with a moisture sensor 5 for detecting grain moisture, grains are stretched into the cooling chamber 1. At the time of the tensioning operation for loading the grains into the drying chamber 3 and during the discharge operation for discharging the grains from the drying chamber 3 into the cooling room 1, the moisture sensor 5 detects the grain moisture content during the loading operation and during the discharge operation. This is a grain moisture detection method characterized by detecting, storing, and displaying.

Effects of the Invention When grains are loaded into the storage chamber 1, the grains being loaded are detected by the moisture sensor 5 and stored as the initial moisture content of the grains. When drying the grains, the grains are repeatedly circulated from the storage chamber 1 to the drying chamber 3, and the hot air generated from the hot air device 4 passes through the drying chamber 3. The grains flowing down through the drying chamber 3 are exposed to this hot air and dried, and the grain moisture during drying is detected by the moisture sensor 5. When the detected grain moisture becomes the same as the finishing target moisture, the grain is dried. The grain dryer is automatically stopped and the drying of the grain is stopped.

When the grains to be dried cannot be put into the storage chamber 1 and remain, the remaining grains are put into the cooling room 2. Detected in 5,
The grains stuffed into the cooling chamber 2 are stored as initial moisture content of the grains. When drying the grains, the circulation of flowing down from the cooling room 2 to the storage room 1 and the drying room 3 is repeated, and while the grains are dried in the same manner as described above, the moisture content of the grains is detected. When the finishing target is reached, the dryer is automatically controlled to stop drying the grains.

When the dried grains are left to cool, the dried grains are discharged from the drying chamber 3 into the cooling chamber 2, stored in the cooling chamber 2, and then dried. , is left to cool in this cooling room 2.

The moisture in the dried grains being discharged and supplied into the cooling chamber 2 is detected by the moisture sensor 5 and stored as the grain moisture in the cooling chamber 2.

Effects of the Invention According to the present invention, the moisture of the grains put into the cooling room 2 or the dried grains discharged into the cooling room 2 is detected by the moisture sensor 5 and stored. By doing so, it is possible to read the grain moisture in the cooling room 2, thereby making it possible to reliably carry out post-hulling work, etc.
Furthermore, by being able to know the initial moisture content of the entire grain loaded into the grain dryer, drying of the grain can be accurately controlled.

Example An embodiment of the present invention will be described below based on the drawings.

The section side shows a circulation type grain dryer 6 which is provided with a cooling section having a cooling chamber 2 in the upper part, a storage chamber 1 in the middle part, and a drying part having a drying chamber 3 in the lower part.

This dryer 6 has a rectangular shape that is long in the front and back direction, and has an upper transfer gutter 9 in which an upper transfer spiral 8 is rotatably installed in the upper part of the mechanism 7.
A ceiling plate 10 is provided, and a cooling chamber 2 for cooling grains is formed below the ceiling plate 10.

On the lower side of the cooling chamber 2, left and right upper grain collecting troughs 12, 12 are provided between the left and right outer flow shelves 11 and the left and right center flow shelves 11. There is a diamond-shaped guide plate 13.13 on the upper side of the center of the grain troughs 12, 12.
The configuration includes the following.

In the upper grain collection troughs 12, 12 there is an upper grain collection transfer spiral 1.
4.14 is rotatably supported, and this upper grain collection i12.1
The bottom plates 15, 15 of No. 2 are configured to be openable and closable, and when the bottom plates 15, 15 are open, the upper grain collection gutter 1.2.1
The grains in 2 are configured to flow down to the lower part, and the upper grain collection transfer spirals 14, 1.4 are configured to be in a stopped state when in the open state.

When the bottom plates 15, 15 are in the closed state, the upper grain collection transfer spiral 14.14 is configured to rotate and transfer the grains to the outside of the machine, and 16.16 is a discharge funnel for the upper grain collection; The bottom plates 15, 15 are opened and closed by bottom plate opening/closing motors 17, 17.

A lower transfer gutter 19 in which a lower transfer spiral 18 is rotatably installed is provided in the space between the upper grain collection gutter 12, 12, and the storage chamber 1 for storing grains is provided below the lower transfer gutter 19. is forming.

On the lower side of the storage chamber 1, four drying chambers 3 are provided between the three exhaust chambers 20 on both left and right sides and in the center and the ventilation chambers 2121 on both left and right sides. At the bottom of each drying chamber 3 are respective delivery valves 2 that feed out the grains and let them flow down.
2 is rotatably supported by a shaft, and 23 is a delivery valve motor that rotationally drives each delivery valve 22 via a deceleration mechanism 24.

A lower grain collection gutter 26 in which a lower grain collection transfer spiral 25 is rotatably installed is connected to the lower side of each of the drying chambers 3.

On the front side of the vertical wall 7, a hanging air passage chamber 27 is formed which communicates with each of the air blowing chambers 2121, and the hot air device 4 is removably attached to this air passage chamber 27. An operating device 28 for starting and stopping the hot air device 4, the dryer 6, etc. for each operation of loading, drying, and discharging is removably attached.

Further, on the back side of the mechanism 7, there is formed an air exhaust duct chamber 29 that can communicate with the respective air exhaust chambers 20 on the left, right, outer and center parts, and an air exhaust duct 30 on the rear side of the center of this air exhaust duct chamber 29 is provided with an exhaust duct. A wind fan 31 is provided, and the wind exhaust passage chamber 29 is provided with a wind blower motor 32 for rotationally driving the wind blower 31.

The hot air device 4 has a burner 34 removably installed in a burner case 33, and a fuel pump 35 having a fuel valve is removably installed outside the lower plate of the burner case 33.
It is configured to suck fuel in a fuel tank 36 and supply it to the burner 34, and on the outside of the upper plate there is a blower 37 that feeds combustion air into the burner 34, and a blower motor that rotationally drives the blower 37. 38.

A central part in the longitudinal direction of the bottom plate of the upper transfer gutter 8 and a central part in the longitudinal direction of the bottom plate of the lower transfer gutter 19 are provided with respective supply channels for supplying transferred grains into the cooling chamber 2 and the storage chamber 1. Upper and lower diffusion plates 39.3 are provided below each supply port to uniformly diffuse and return grains to the cooling chamber 2 and the storage chamber 1.
There are 9. Also, in the cooling chamber 2 and the storage chamber 1, there are fullness sensors 40, 40 for detecting the fullness of grains.
The configuration includes the following. Reference numeral 41 denotes a lower feed spiral motor for rotationally driving the lower transfer spiral 18, the lower diffusion plate 39, etc. in the lower transfer gutter 19.

A lower branch feed gutter discharge funnel 42 is provided at the bottom of one end side of the lower transfer gutter 19, and a lower branch feed gutter funnel switching valve 44 that can be opened and closed by a switching motor 43 is provided within the lower branch feed gutter discharge funnel 42. When the lower branch feeding trough/funnel switching valve 44 is closed, the grains are transferred to the lower diffusion plate 39 by the lower transfer spiral 18 in the lower transfer trough 19, and the grains are transferred to the storage chamber l by the lower diffusion plate 39. When the lower branch feeding gutter funnel switching valve 44 is closed, the grains are discharged from the lower transfer gutter 19 to the outside of the machine via the lower branch feeding gutter discharge funnel 42. .

The grain hoisting machine 45 is provided outside after the mechanism 7, and has a belt with a packet conveyor 46 stretched inside, and a dispensing tube 47 is provided at the upper end, and one side of the dispensing tube 47 is provided. and the starting end of the upper transfer gutter 9, and this dispensing tube 47
The other side and the starting end of the lower transfer gutter 19 are communicated via a flow tube 48, and a supply gutter 49 is provided between the lower end and the terminal end of the lower grain collection gutter 26 for communication.

A dispensing barrel switching valve 51 that can be opened and closed by a switching valve motor 50 that rotates forward and backward is provided in the dispensing barrel 47, and when the dispensing barrel switching valve 51 is open, grains are removed from the dispensing barrel 42. The grains are supplied into the upper transfer gutter 9, and when the dispensing tube switching valve 51 is closed, the grains are supplied from the dispensing tube 47 into the lower transfer gutter 19 via the downflow tube 48. There is.

52 is a grain raising machine upper motor, which is connected to the packet conveyor 46;
The upper transfer spiral 8 and the upper spreading plate 39 in the upper transfer gutter 9 are rotatably driven, and the lower grain collection transfer spiral 25 in the lower grain collection gutter 26 is connected to the packet conveyor. It is configured to be rotationally driven via a belt with 46.

Further, 53 is a grain hoist lower motor, which connects the upper grain collecting trough 12.1.
The upper grain collection transfer spirals 14, 14 in 2 are rotationally driven.

A moisture sensor 5 for detecting grain moisture is provided below the middle of the grain hoist 45 in the vertical direction.

The moisture sensor 5 is caused by the transmission of an electrical measurement signal from the operating device 28 to cause the moisture motor 54 to rotate and each part of the moisture sensor 5 to be rotated, and to fall while being transported to the upper part by the packet conveyor 46. It is configured to receive grains, crush the grains under pressure, and at the same time detect the water content of the crushed grains.

The operating device 28 is box-shaped, and the surface plate of the box has a
Start switches 55 and 55' for starting and stopping the drying section and the cooling section of the dryer 6 for each operation of loading, drying and discharging separately; stop switches 56 and 56 for stopping the drying section and the cooling section of the dryer 6;
', and each start switch 55 for starting the discharge work.
．． 55' is provided with two starting switches 55 for starting the drying section, which are activated when discharging the grains from the drying section to the cooling section and when discharging the grains to a discharge conveyor (not shown); Further, two start switches 55' are provided for starting the cooling section, which are activated when discharging from the cooling section to the discharge conveyor and when discharging to the drying section.

Moisture setting resistor 57 for setting the finishing target moisture content of grains depending on the operating position, grain type order setting pusher 58 for setting the temperature of the hot air generated from the burner 34 depending on the operating position, firming amount setting pusher 59, grain As a configuration in which only these parts of a low-return switch type are provided, such as a circulation amount setting knob 60 for setting the circulation amount of the burner according to the operating position and an air volume setting knob 61 for setting the air volume passing through the burner 34 section according to the operating position. There is.

A drying mode selector switch 62 for setting single drying in which only the drying section is circulated for drying, or double drying in which both the drying section and the cooling section are circulated for drying, and a drying mode selection switch 62 for setting drying time or cooling. A changeover setting switch 63 for switching between time settings and an increase/decrease setting switch 6 for increasing/decreasing the set time
4 timer-related components, an information card outlet 65, a manual dispensing barrel switch 66 for switching the dispensing barrel switching valve 51 between the drying section and the cooling section, and a buzzer stop switch 67.
, abnormality display stop switch 68, hot air temperature.

A digital display section 69 that digitally displays grain moisture, remaining drying time, external moisture content, moisture measurement, etc., and a digital display section 70 and O that digitally displays user name, date, variety, etc.
The configuration includes a K monitor 71.

The grain moisture that has been detected passing through the drying chamber 3 is displayed on the display section 69, or
The structure includes a display changeover switch 72 for switching whether or not the detected grain moisture stored in the grain is displayed on the display section 69, as well as various other switches and parts.

Further, an A-D converter 74 for A-D converting the detection values detected by the moisture sensor 5, hot air temperature sensor 73, etc. is provided inside.
An input circuit 75 into which the converted value converted by the A-D converter 74 is input, and the switches 55.55' and 56.56.
', etc., and various input values inputted from these input circuits 75.76 to the input circuit 7 to which the operation of the setting desks 58, 59.60, etc. and the detected values detected by the full quantity sensor 40 are inputted. a CPU 77 that performs logical operations, comparison operations, etc.;
It has a built-in drying control device 79 that includes an output circuit 78 and the like that receives various commands from the CPU 77 and outputs them.

The drying control by the drying control device 79 is performed as follows. That is, the operation details of the moisture setting control 57 are input to the CPU 77, and the target moisture content of the grain is set based on this input. On the other hand, the grain moisture detected by the moisture sensor 52 during the drying operation is also input to the CPU 77, and the input detected grain moisture is compared with the set finishing target moisture, and the detected grain moisture reaches the finishing target moisture. When this is detected, each operating part of the dryer 6 is automatically stopped to finish drying the grains.

In addition, the drying control device 79 has the following functions. That is, when the dried grains are left to cool, when performing the discharge operation of discharging the dried grains in the storage chamber 1 of the drying section into the cooling chamber 2 of the cooling section, the The operation details of the discharge start switch 55 for discharging to the cooling section of the drying section are the CP.
Even when the input is input to U77 and the grains are discharged to the cooling chamber 2 by this human power, the moisture sensor 5 is input to the CPU 7.
7, and the moisture of the dried grains falling while being transported to the upper part of the grain hoist 45 is detected, an average value is calculated, and the average value is stored and retained in the CPU 77. , when the operation of the display changeover switch 72 toward the cooling section side corresponds to C.
When input to the PU 77, the detected and stored dried grain moisture is displayed on the display section 69.

Also, when performing a stake-in operation for pitching the remaining grains that could not be staked into the storage chamber 1 into the cold-discharge chamber 2, the stake-in start switch 55' for stake-in of the cold-dissipation section is activated. The operation contents are input to the CPU 77, and even when grains are being loaded into the cooling chamber 2, the moisture sensor 5 is activated by the CPU 77.
It is configured such that the start-up is controlled by U77, and the moisture content of the grains falling while being conveyed to the upper part by the grain hoist 45 is detected, an average value is calculated, and the average value is stored and retained in the CPU 77,
Operation of the display changeover switch 72 to the cooling section side causes the corresponding CP.
When inputted to U77, the detected and stored grain moisture is displayed on the display section 69 according to this input.

The grain type setting mechanism 58 and the loading amount setting fluctuation 59
The operation contents are input to the CPU 77, and the temperature of the hot air generated from the burner 34 is set based on this input.

On the other hand, the hot air temperature detected by the hot air temperature sensor 73 is also
The input detected hot air temperature and the set hot air temperature are input to the PU 77, and if they are different, the number of opening/closing times of the fuel valve and the rotation of the blower motor 38 are changed so that the temperature becomes the same as the set hot air temperature. The configuration is such that this is controlled.

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

When performing single drying by operating the setting selections 58, 59, 60, etc. of the operating device 28, and other folding and switches, etc., to the predetermined positions, operate the drying mode changeover switch 62 to the single drying side. Then, by operating the drying start switch 55 that starts drying work in the drying section, each part of the grain dryer 6, the hot air device 4, the moisture sensor 5, etc. are started, and the burner 34 of the hot air device 4 starts. When the hot air is generated and the bottom plates 15.15 of the upper grain collection troughs 12, 12 are closed, the upper grain collection transfer spiral 14.14 is controlled to be in a stopped state.

This hot air passes through the air duct chamber 27 and the air duct chamber 21.21, passes through each drying chamber 3, passes through each air exhaust chamber 20 and air exhaust duct chamber 29, and is sucked and exhausted by the air exhaust fan 31, thereby creating a storage chamber. The grains stored in I are exposed to this hot air and dried while flowing down from this storage chamber 1 into each of the drying chambers 3, and are delivered to the lower part by each delivery valve 22 and flowed down to collect in the lower part. The lower grain collection transfer spiral 2 passes from the grain trough 26 into the grain raising machine 45 via the supply trough 49.
5, is transported to the upper part by a packet conveyor 46, passes through a dispensing cylinder 47 and a falling cylinder 48, and is transferred to the lower transfer gutter 1.
9 and from this lower transfer gutter 19 to the lower diffusion plate 39.
It is transferred upward by the lower transfer spiral 18, and this lower diffusion plate 3
When the moisture sensor 5 detects the same grain moisture as the finishing target moisture set by operating the moisture setting swing 57 after being uniformly diffused and returned into the storage chamber 1 at step 9 and dried by circulation, the operating device The drying Ia is automatically controlled by the drying control device 79 of 28.
6 is automatically stopped to stop the drying of the grains.

When drying the dried grains, the drying m6
Each part of the upper grain collecting trough 12. ．． At the same time as the bottom plates 15, 15 of 12 are in the closed state, the upper grain collecting transfer spiral 14°14 is controlled to be in the stopped state.

The dried grains in the storage chamber 1 are fed out from the storage chamber 1 to the lower part of each drying chamber 3 by the respective delivery valves 22 and flowed down from the lower grain collection gutter 26 to the supply gutter 49. The grains are transferred and supplied into the grain raising machine 45 by the lower grain collection transfer spiral 25, are transported to the upper part by the packet conveyor 46, are supplied to the upper transport @ 9 via the discharging cylinder 47, and are The dried grains are transferred and supplied from the transfer gutter 9 onto the upper diffusion plate 39 by the upper transfer spiral 8, and are evenly distributed and supplied into the cooling chamber 2 by the upper diffusion plate 39. It is cooled down.

Even during this discharge operation, the moisture sensor 5 is activated to detect the moisture content of the dried grains being discharged, and the detected moisture is stored in the CPU 77 of the operating device 28. When the display changeover switch 72 is operated to switch to the cooling section side, the stored moisture content of the dried grains is displayed on the display section 69.

The grains have been put into the storage chamber 1, but when the remaining grains that could not be put into the storage room 1 are put into the cooling room 2,
By operating the tensioning start switch 55' that starts the tensioning work of the cooling section of the operating device 28, each part of the dryer 6 is started, and the grains fed into the grain raising machine 45 are is conveyed to the upper part by the packet conveyor 46 and supplied into the upper transfer gutter 9 through the dispensing cylinder 47, and is transferred from the upper transfer gutter 9 onto the upper diffusion plate 39 by the upper transfer spiral 8, The upper diffusion plate 39 uniformly diffuses and supplies the water into the cooling chamber 2 .

Also during this tensioning operation, the moisture sensor 5 is activated to detect the moisture content of the grains being tensioned, and the operating device 28
It is stored as initial grain moisture in PU77. When the display changeover switch 72 is operated to switch to the cooling section side, the stored moisture content of the grains is displayed on the display section 69.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a block diagram, Fig. 2 is a flowchart, Fig. 3 is an overall side view of the grain dryer, and Fig. 4 is A--A in Fig. 3. A is an enlarged sectional view of A, FIG. 5 is an enlarged sectional view of B-B in FIG. 3, FIGS. 6 and 7 are an enlarged rear view of a part of the grain dryer, and FIG. FIG. 9 is an enlarged partially cutaway front view of a portion of the grain dryer. Explanation of symbols 1 Storage chamber 2 Cooling chamber 3 Drying chamber 4 Hot air device 5 Moisture sensor

Claims (1)

[Claims] A cooling chamber 2 for cooling the grains is provided on the upper side of the storage chamber 1 for storing the grains, and a drying chamber 3 for drying the grains is provided on the lower side. In a grain dryer equipped with a moisture sensor 5 for detecting grain moisture, the grain dryer is equipped with a moisture sensor 5 for ventilation and drying, and is used during the loading operation of loading grain into the cooling chamber 1 and during the drying process. The grains in chamber 3 are transferred to the cooling chamber 1.
This grain moisture detection method is characterized in that, during the discharge operation in which the grains are discharged, the moisture sensor 5 detects, stores and displays the moisture of the grains during the filling operation and during the discharge operation.