JPH0650222B2 - Grain drying control system of grain dryer - Google Patents

Description

TECHNICAL FIELD The present invention relates to a grain drying control system for a grain dryer.

Conventional technology Conventionally, the moisture of a grain to be dried by circulating it in the drying chamber from the storage chamber is detected by the moisture detection sensor, and when this moisture detection sensor detects the same grain moisture value as the set grain moisture value, It was a method of stopping the drying operation of the grain by controlling the dryer to stop.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above-described embodiment, the temperature of the grain rises abnormally depending on the state of the outside air and the hot air temperature, the drying rate of the grain per unit time becomes high, and the It causes crushing.

Means for Solving the Problems The present invention is intended to solve the above-mentioned problems, and a storage chamber 1 for storing grains is provided in the upper part, and a drying chamber 2 in which the grains flow down is provided in the lower part. Detection information from a moisture detection sensor 7 that detects the moisture content of the grains during circulation drying while providing the generated hot air from the hot air chamber 4 through the drying chamber 2 and the exhaust air chamber 5 by the exhaust fan 6 In response to this, a calculating means for calculating the drying loss rate of the grain being circulated and dried, a comparing means for comparing this drying loss rate with a predetermined set value, and when the drying loss rate is equal to or higher than the predetermined drying rate based on the comparison result, Grain drying control of a grain dryer including a control device 32 including a drive unit that stops the burner 3 to stop the drying operation for a predetermined time and outputs a signal to continue drying when the drying loss rate is equal to or less than a predetermined drying loss rate. The system configuration.

Action and Effect of the Invention Grain flowing down from the storage chamber 1 into the drying chamber 2 is dried by receiving hot air from the burner 3. Upon receiving the moisture detection information of the dried grain, the control device 32 calculates the drying loss rate, compares the calculated drying loss rate with the preset drying loss rate stored in advance, and determines whether the drying loss rate is equal to or higher than the set drying loss rate. At this time, the control device 32 stops the burner 3 and starts the idle drying operation.

For this reason, the grain temperature is lowered with the interruption of the drying operation, and the increase in the drying loss rate is suppressed even in the re-drying operation after the lapse of a predetermined time, so that the cracking and crushing of the grain can be reduced.

Embodiment In the illustrated example, the machine wall (9) of the dryer (8) has a rectangular shape in plan view that is long in the front-rear direction, and includes front and rear wall plates and left and right wall plates. The operating device (10) for controlling the start and stop of (8) and the moisture detection sensor (7) for detecting the moisture loss of the grains stored in the machine wall (9) to detect the drying rate are detachable. It is attached to the.

While located in the center of the lower part of the machine wall (9) and extending in the front-rear direction, a V-shaped grain collecting trough (1 in front view) in which a transfer spiral is installed is installed.
1) is provided, and drying chambers (2) and (2) are vertically formed on the grain collecting trough (11) to communicate with each other.
Under the drying chambers (2), (2), feeding valves (12), (12) are rotatably supported, and grains are fed out from the drying chamber (2) and flow down.

An inclined plate is provided on the upper part of each ventilation net plate, a partition plate is provided on the lower part, and a hot air chamber (4) is formed between the inner ventilation net plates,
It is configured to communicate with a burner (3) built in a burner case (13) provided on the front wall plate portion, and an exhaust chamber (between the outer ventilation net plate and the left and right lateral plates). 5) is formed so as to communicate with the exhaust fan (6) provided on the rear wall plate portion. A hot air temperature detection sensor (14) for detecting the hot air temperature in the hot air chamber (4) is provided on the inner wall portion of the rear wall plate in the hot air chamber (4), and the rear wall plate lower part Is provided with a motor (15), and with this motor (15), the transfer spiral in the grain collecting trough (11), the feeding valve (12),
(12) and the exhaust fan (6) are rotationally driven.

A fuel tank (16) is installed in the front part of the dryer (8), and a fuel pump (17) for supplying fuel into the burner (3) is provided outside the lower wall plate of the burner case (13),
Fuel is supplied from the fuel tank (16) into the burner (3) through a fuel hose, the fuel pump (17) and a fuel supply pipe, and combustion air is generated in the burner case (1).
3) The blower motor (18) is a blower provided outside the upper wall plate.
Is driven to rotate and is blown into the burner (3) through a blower duct.

A storage chamber (1) is formed above the drying chambers (2) and (2), and ceiling plates (19) and (19) above the storage chamber (1) are formed.
A transfer gutter (20) with a transfer spiral inside is installed along the
A supply port for supplying the transfer grains into the storage chamber (1) is opened in the central part of the transfer gutter (20), and a diffusion plate (21) is provided below the supply port, and the diffusion plate (21) is provided. Then, the grain is uniformly diffused and reduced into the storage chamber (10).

The sublimation machine (22) is detachably attached to the front part of the front wall plate,
Inside, a bucket conveyor (23) belt is stretched between the upper and lower pulleys, and an ejecting tube (24) is provided between the upper end and the starting end of the transfer gutter (20) to communicate with each other, and the lower end and A supply gutter (25) is provided between the terminal end of the grain collecting gutter (11) and communicates therewith, and a motor (26) is provided on one side of the upper part of the grain raising machine (22).
Is provided, and the motor (26) rotationally drives the belt of the bucket conveyor (23) and the transfer spiral in the transfer gutter (20).

The water content detection sensor (7) is box-shaped, and a detection unit for detecting water content of the grain protrudes from the inside of the box body, and the protruding detection unit is mounted so as to protrude into the front wall plate. (9) Grains flowing through the inside are crushed by the detection unit at the same time, and at the same time, the moisture content of the crushed grains is detected to detect the drying rate per unit time. ) Is a configuration in which a motor (37) in the moisture detection sensor (7) is rotationally driven by an electric measurement signal from the operating device (10) to activate the moisture detection sensor (7).

The operating device (10) has a box shape, and a start switch (27), a stop switch (28), a target moisture setting scoop (29), a hot air temperature setting scoop (30) and a grain type setting scoop are provided on the surface. (31) and the like, and has a control device (32) inside, and the control device (32) has the switches (27), (28) and the setting knobs (29), (3
An input circuit (33) to which the operations 0) and (31) are input,
An AD converter (34) for AD converting detection values detected by the moisture detection sensor (7) and the hot air temperature detection sensor (14), and conversion converted by the AD converter (34) An input circuit (34) for inputting a value, a CPU (35) for performing arithmetic logic operation and comparison operation for various input values input by these input circuits (34), (34), and this CP
It is configured to have an output circuit (36) for receiving and outputting various commands instructed by the U (35), and the water content detection sensor (7), the fuel pump (17) and various devices are controlled by the control device (32). Motor (15), (18), (2
6) and the like are controlled such as starting and stopping.

The CPU (35) compares the set grain moisture value set by the target moisture setting scoop (29) with the detected grain moisture value detected by the moisture detection sensor (7) to determine the set grain moisture value. When the moisture detection sensor (7) detects the same grain moisture value, the dryer (8) is automatically stopped, and the detected grain moisture value is the surface of the surface of the operating device (10). A configuration for displaying on a window, and a configuration in which this CPU (35) detects the drying rate of the grain per unit time based on the grain moisture value detected by the moisture detection sensor (7),
The CPU (35) compares the detected grain dryness rate with the set grain dryness rate stored in the CPU (35),
When the detected grain dryness rate is equal to or higher than the set grain dryness rate,
The CPU (35) temporarily controls the dryer (8) to suspend the drying of the grain, and then the CPU (35) controls the restart of the dryer (8) to re-dry the grain. It is a configuration that allows it. If the detected grain dryness rate is less than or equal to the set grain dryness rate, the CPU (35) causes the dryer (8) to
Is a configuration for continuous operation control.

The CPU (35) causes the burner (3) to reach the set hot air temperature set by the hot air temperature setting knob (30).
The fuel pump (17) for supplying fuel into the inside is controlled, and the hot air temperature generated by the burner (3) is detected by the hot air temperature detection sensor (14) and set as the detected hot air temperature. This CPU is compared with the hot air temperature so that the detected hot air temperature becomes the same as the set hot air temperature.
(35) controls the fuel pump (17) to control the flow rate of fuel supplied into the burner (3).

Setting knobs (29), (30) of the operating device (10),
By operating (31) and operating the start switch (27), hot air is generated from the burner (3) provided on the front wall plate portion, and the hot air is discharged from the exhaust fan (6) provided on the rear wall plate portion. The air is sucked and exhausted by the hot air chamber (4) to the drying chamber (2).
The grains that have been ventilated and stored in the machine wall (9) of the dryer (8) are dried by being exposed to this hot air while flowing down from the storage chamber (1) in the drying chamber (2) and then fed out. It is delivered to the lower part by the valve (12), is transferred and discharged into the supply gutter (25) through the grain collecting gutter (11) at the lower transfer spiral, is conveyed to the upper part by the grain raising machine (22), and is transferred to the upper part. It is transferred and supplied to the diffuser plate (21) through the transfer gutter (20) by a spiral,
In 1), it is uniformly diffused / reduced into the storage chamber (1), circulated and dried, and a target moisture setting scoop (29) of the operating device (10).
When the moisture detection sensor (7) detects the moisture content of the grain that is the same as the moisture content of the grain set in step 1, the controller (32) of the operating device (10) automatically controls the dryer (8) to automatically Although stopped, the moisture detection sensor (7) is used during this drying operation.
The detected grain drying rate is compared with the set grain drying rate stored in the control device (32) of the operating device (10), and the detected grain drying rate is set to the set grain drying rate. If it is equal to or more than the reduction rate, the controller (32) controls the dryer (8) to pause,
The drying of the grain is paused, and then the dryer (8) is restart-controlled by the controller (32) to re-dry the grain. If the detected grain dryness rate is less than or equal to the set grain dryness rate,
The controller (32) continuously controls the dryer (8) to continuously dry the grain.

The moisture detection sensor (7) detects the dryness rate of the grains that are housed and dried in the machine wall (9), and the detected grain dryness rate and the set grain dryness rate are compared. Based on this comparison, the dryer (8) is temporarily stopped or continuously operated, so that the temperature of the grain during drying is in the outside air, the hot air temperature generated by the burner (3), etc. Since it does not rise abnormally, the grain does not crack or crush.

[Brief description of drawings]

1 is a block diagram, FIG. 2 is a partially cutaway front view, FIG. 3 is a partially broken side view, and FIG. 4 is a part thereof. FIG. In the figure, reference numeral (1) is a storage chamber, (2) is a drying chamber, (3) is a burner, (4) is a hot air chamber, (5) is an exhaust chamber, (6) is an exhaust fan, and (7) is A moisture detection sensor is shown.

Claims (1)

[Claims] 1. A storage chamber 1 for storing grains is provided in an upper portion,
A drying chamber 2 in which the grains flow down is provided at the bottom, and a burner 3
The hot air generated from the hot air chamber 4 is dried by the drying chamber 2 and the exhaust chamber 5
Calculation for calculating the drying loss rate of the grain being circulated and dried by receiving the detection information from the moisture detection sensor 7 for detecting the moisture of the grain being circulated and dried Means and a comparing means for comparing the drying loss rate with a predetermined set value, and based on the comparison result, when the drying loss rate is equal to or higher than a predetermined value, the burner 3 is stopped to stop the drying operation for a predetermined time and to perform a predetermined drying rate. A grain drying control method for a grain dryer, which is provided with a control device 32 including a driving unit that outputs to continue drying when the rate is less than or equal to the reduction rate.