JPS61268975A - Cereal-grain drying control system of cereal grain drier - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

Conventional technology In the past, the finishing target moisture of grains to be dried was set by operating a target moisture setting knob, and when a moisture detection device detected a moisture value of the grains that was the same as the set target moisture value, the dryer It was a drying control method that automatically stopped the drying process.

Problem to be Solved by the Invention While grains stored in a storage chamber are allowed to flow down from this storage chamber into a lower drying chamber, hot air generated from a burner is ventilated from the hot air chamber to the drying chamber, and the exhaust chamber is closed. Then, by sucking and exhausting air with an exhaust fan, the grains flowing down in the drying chamber are exposed to this hot air and dried, while the moisture detection device detects the moisture content of the drying grains, and the target moisture setting method is set. In a dryer that automatically stops when the moisture detection device detects a moisture value that is the same as the set value set manually, if dried grains are stored and left in the dryer, the residual heat after drying will cause the drying to stop. The moisture value may be lower than the moisture value at the time of drying, or the moisture value may be lower than the moisture value at the end of drying due to the moisture of the dried grains migrating due to the climate of the year or the installation location of the dryer. It may be high or it may be low.

Means for Solving the Problems This invention provides a storage chamber (1) in the upper part for storing grains, a drying chamber (2) in the lower part through which the grains flow down, and a burner (3). The hot air generated by the hot air is discharged from the hot air chamber (4) through the drying chamber (2) and the exhaust chamber (5). L41 (6)
The storage chamber (1) is provided with a moisture detection device (7) for detecting moisture between the grains during circulation drying and the grains when the dried grains are discharged outside the machine. ),
The moisture transfer amount of the grain is detected based on the difference between the finishing target moisture value at the end of drying detected by this moisture detection device (7) and the moisture value at the time of discharge, and the amount of moisture transferred to the grain is determined by the difference between the finishing target moisture value at the end of drying and the moisture value at the time of discharge. A grain drying control system for a grain dryer is configured in which a target moisture value is corrected and controlled by the detected moisture transfer amount to set a new finishing target moisture value for grain drying.

Effects of the Invention The grains flowing down from the storage chamber (1) into the drying chamber (2) are transported by hot air generated from the burner (3) from the hot air chamber (4) to the drying chamber (2) and the exhaust chamber (5). ), and is suctioned and exhausted by the exhaust fan (6), and is exposed to this hot air and dried.
During this drying process, a moisture detector (
7), and when this moisture detection device (7) detects a moisture value that is the same as the set value set by operating the target moisture setting control, the control device automatically controls the dryer to automatically stop the drying process. When discharging finished grains to the outside of the machine, the moisture value of the grains to be discharged is also detected by this moisture detection device M (7), and the detected grain moisture value at the time of discharge and the finish at the end of drying are detected. The control device compares the grain moisture value with the grain moisture value, detects the moisture transfer amount of the grains that has migrated while being stored in the dryer after drying is completed, and this moisture transfer amount is stored in the control device and continues. At the time of a new grain drying operation, the finishing target moisture value set by operating the target moisture setting knob is corrected by the control device by the detected moisture transfer amount, and the grains are dried.

For example, if the moisture value at the time of drying is higher than the moisture value at the end of drying, the target moisture setting will be adjusted by this higher moisture value during the subsequent new grain drying operation. The dryer is automatically stopped after drying the grains more than the set moisture value set in . On the other hand, if the moisture value at the time of discharge is lower than the moisture value at the end of drying, the target moisture setting parameter is set by this lower moisture value during the subsequent new grain drying operation. To automatically stop the drying machine by stopping drying of grains earlier than a set moisture value set by the operator.

Effects of the Invention According to the present invention, the moisture value of the grains at the end of drying and the moisture value when the dried grains are discharged outside the machine are detected by the moisture detection device (7), and the detected moisture values of both are detected. The moisture transfer amount of the grains after drying is detected, and this transfer amount determines the set moisture value set in the target moisture setting tool when starting a new grain drying operation. Since the amount of moisture transferred is corrected and controlled, the amount of moisture transferred to the grain is taken into account in advance due to the residual heat after drying, the climate of the year, and the location of the dryer. Since it will be dried, the exact grain moisture value required can be obtained.

Embodiment In the example shown in Figure 1, the machine wall (10) of the dryer (9) has a rectangular shape in plan view that is long in the front and back direction, and is made up of front and rear wall plates and left and right wall plates, and there is a ceiling above the machine wall (10). board (11),
(11), an operating device (12) and a moisture detection device (7) are removably attached to the front wall plate, and the operating device (
12) is a configuration for controlling starting, stopping, etc. of the dryer (9) and the moisture detecting device (7).

A lower transfer gutter (10), which is U-shaped in front view and has a transfer spiral inside, is provided at the center of the lower part of the machine wall (10) and extends in the longitudinal direction. A grain collecting room (15) having a V-shape when viewed from the front is provided and communicated with each other, and above the grain collecting room (15), drying rooms (2), (2) are formed vertically between the left and right ventilation mesh plates. This drying chamber (2), (
2) At the bottom there is a feeding valve (1B) that feeds out the grains and flows down.
) and (1B) are rotatably supported.

An inclined plate is provided on the upper side of each ventilation mesh plate, a partition plate is provided on the lower side, and a hot air chamber (4) is formed between the inner ventilation mesh plates,
It is configured to communicate with a burner (3) housed inside a burner case (17) provided on the front wall plate, and an exhaust chamber (5) is provided between the outer ventilation net plate and the left and right wall plates. , (5) are formed and communicated with the exhaust fan (6) provided in the rear wall plate section. A hot air temperature detection sensor (18) for detecting the hot air temperature in the hot air chamber (4) is provided on the inner wall of the rear wall plate behind the hot air chamber (4), and a hot air temperature detection sensor (18) is provided at the lower part of the rear wall. A motor (18) is provided, and the rotation of this motor (19) rotationally drives the transfer helix in the lower transfer gutter (14), the delivery valves (16), (TE), the exhaust fan (6), etc. It is the composition.

A fuel tank (20) is installed at the front of the drying m (9), a fuel pump (21) is installed at the outer side of the lower wall plate of the burner case (17), and a fuel hose, It is configured to supply fuel into the burner (3) via the fuel pump (21) and fuel supply pipe, and combustion air is supplied to the burner case (17) by a blower (13) installed on the outside of the earthen wall plate.
) and a blower motor (22) to blow air into the burner (3) through a blower duct.

A storage chamber (1) is formed above the drying chamber (2), (2), and the ceiling plate (11) above the storage chamber (1);
(11) is provided with an upper transfer gutter (23) equipped with a transfer helix, and a supply port for supplying the transferred grains into the storage chamber (1) is opened in the center of the upper transfer gutter (23). A diffusion plate (24) is provided at the lower part of this supply port, and this diffusion m (24) is configured to uniformly diffuse and return the grains into the storage chamber (1).

The grain raising machine (25) is detachably attached to the front part of the front wall board, and a packet conveyor (28) belt is stretched between the upper and lower pulleys inside, and the upper end and the starting end of the upper transfer gutter (23) are connected to each other. A dispensing tube (27) is provided between the lower end and the terminal end of the lower transfer gutter (14) to communicate with each other, and a supply gutter (28) is provided between the lower end and the terminal end of the lower transfer gutter (14) to communicate with the grain raising machine (25). A motor (29) is provided on the upper side, and rotation of this motor (28) causes the packet conveyor (2B) belt and the upper transfer gutter (2
3) is configured to rotationally drive the transfer helix, etc.

The moisture detecting device (7) has a box shape, and a moisture detecting section for detecting moisture in grains protrudes from inside the box, and this protruding detecting section is mounted so as to protrude into the front wall plate. At the same time, the grains flowing down inside the wall (lO) are crushed under pressure,
The moisture detection device (7) is configured to detect the moisture content of the crushed grains, and the moisture detection device (7) is configured to be activated by transmission of an electrical measurement signal from the operating device (12).

The operating device (12) is box-shaped, and has a start switch (30), a stop switch (31), a target moisture setting hole (8), a hot air temperature setting hole (32), etc. on the surface, and has an inner surface. The configuration includes a control device (33), etc.
The control device (33) has the respective switches (30), (3
1) and an input circuit (34) into which the operations of the respective settings (8) and (32) are input, and the detection values detected by the moisture detection device (7) and the hot air temperature detection sensor (1 day) are A
- an A-D converter (35) that performs D conversion; an input circuit (input circuit) into which the converted value converted by this A-D converter (35) is input;
34) A CPU (3B) that performs arithmetic and logical operations, comparison operations, etc. on various input values input from these input circuits (34) and (34), and outputs various commands issued by this CPU (3B). The configuration includes an output circuit (37), etc., and this control device (33) controls the moisture detection device (7), the fuel pump (21), the motors (19), (22), (2B), etc. This is a configuration in which starting, stopping, control, etc. are performed.

The CPU (3B) compares the set moisture value set in the target moisture setting unit (8) with the detected moisture value detected by the moisture detection device (7), and sets the same moisture value as the set moisture value to this moisture value. When detected by the detection device (7), the dryer (9) is controlled by the CPU (3B) to automatically stop it,
Also when discharging dried grains from this dryer (9).

Detecting the moisture of the grains to be discharged with the moisture detection device (7),
The detected moisture value detected during this discharge is compared with the moisture value detected during the finishing to detect the moisture transfer amount of the grains, and this detected moisture transfer amount is stored in the CPU (3B). , When starting a new grain drying operation, this CPU (3) sets the set moisture value set in the target moisture setting function (8).
The configuration is such that this CPU (3B) performs correction control based on the moisture transfer amount stored in B). When starting drying work, the fuel pump (21) is controlled by the CPU (3B) so that the hot air temperature reaches the set hot air temperature by operating the hot air temperature setting control (32). In the burner (3)
At the same time, the hot air temperature detection sensor (18) detects the temperature of the hot air generated from the burner (3), and the detected hot air temperature is determined by the hot air temperature setting sensor (18). The fuel pump (21) is controlled by the CPU (3B) so that the hot air temperature reaches the set hot air temperature set in step 32).

In addition, by comparing the moisture value detected by the moisture detection device (7) at the time of grain finishing and the moisture value at the time of grain discharge,
The control device (33) that detects the amount of moisture transferred to the grains and corrects and controls the finishing target moisture value when drying new grains may be provided inside the box of the moisture detection device (7). .

By operating the operating device (12), hot air generated from the burner (3) provided on the front wall plate is sucked and exhausted by the exhaust fan (6) provided on the rear wall plate, and the hot air chamber (4) Ventilate the drying room (2) and dry 1! The grains stored in the 41 wall (10) of (9) are exposed to this hot air and dried while flowing down in the drying chamber (2), and are fed out to the lower part by the feeding valve (1B), and then Grain is transferred and discharged into the supply gutter (28) via the lower transfer gutter (!4) by the transfer helix, transported to the upper part by the hoisting machine (25), and passed through the upper transfer gutter (23) by the upper transfer helix to the spreading plate. (24) is transferred and supplied to the top of this diffusion plate (2
At 0, the moisture is evenly diffused into the storage chamber (1), circulated and dried, and the grain moisture value that is the same as the set moisture value set in the target moisture setting knob (8) of the operating device (!2) is detected. Bag M (7
) is detected, the control bag W (3
The dryer (9) is automatically stopped under automatic control in step 3).

When the dried grains are discharged from the dryer (9), the operation device (12) is operated, and the moisture detection device (7) detects the moisture content of the grains to be discharged. The control bag 21 (33) compares the detected moisture value at the time of discharge and the moisture value at the time of grain finishing to detect the amount of moisture transfer of the grain from the time of finishing to the time of discharge, This detected amount of moisture transfer is stored in the control device (33), and the finishing target moisture is set in the target moisture setting knob (8) of the operating device (12) during the subsequent new grain drying operation. The value is corrected by the controller (33) by the detected amount of moisture transfer, and the grains are dried.

The moisture content of the grains is reduced at the end of drying and at the drying step 41.
From 1 (9), both are detected when discharging outside the machine,
After the drying of the grains ends, the amount of moisture transferred in the grains during the standing time until discharge is detected, and the target moisture value for finishing at the time of a new grain drying operation is corrected by the detected amount of transferred moisture. The remaining heat after drying and the climate of the year,
Further, the required grain moisture value can be obtained without being affected by the installation location of the dryer (9), etc.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, with FIG. 1 being a block diagram and FIG. 2 being a partially cutaway side view. FIG. 3 is a partially cutaway front view, and FIG. 4 is an enlarged front view of a portion of the dryer. In the figure, symbol (1) is a storage chamber, and symbol (2) is a drying chamber. (3) is a burner, (4) is a hot air chamber, (5) is an exhaust chamber, (
6) shows an exhaust fan, and (7) shows a moisture detection device.

Claims (1)

[Claims] A storage chamber (1) for storing grains is provided in the upper part, a drying chamber (2) is provided in the lower part for the grains to flow down, and a burner (3) is provided in the lower part.
) from the hot air chamber (4) to the drying chamber (2).
A ventilation chamber (5) is provided to suck and exhaust air with an exhaust fan (6), and the storage chamber (1) is provided with a storage chamber (1) for discharging grains undergoing circulation drying and dried grains to the outside of the machine. A moisture detection device (7) is provided for detecting moisture between the grains and the moisture detection device (7).
The moisture transfer amount of the grain is detected based on the difference between the finishing target moisture value at the end of drying detected in step 7) and the moisture value at the time of discharge, and the finishing target moisture value for the subsequent new grain drying is detected. A grain drying control method for a grain dryer that sets a finishing target moisture value for new grain drying by correcting and controlling the amount of moisture transferred.