JPH01114689A - Cereal-grain moisture detecting controller for cereal grain drier - Google Patents

Abstract

PURPOSE: To achieve improvement in the efficiency of drying work by performing a control of measuring moistures to sequentially shorten monitoring time in a moisture detection process according to the progress of drying grain particles. CONSTITUTION: Monitoring time in one detection process based on an actual detection time of 32 particles obtained from the detection of moisture of 32 particles in which the particles are checked by a moisture sensor 22 one at a time and an allowance time of a set memory is controlled longer according to a moisture value detected by the moisture sensor 22 during the drying work when a detected moisture value of the grain particles is high and shorter when the value is low. When the moisture of the specified 32 grain particles is detected within a specified time, the moisture sensor 22 is found to operate normally. Otherwise, when the moisture of the specified 32 grain particles fails to be detected, the failure is determined to occur in the moisture sensor 22 and a dryer 1 is automatically stopped by automatic control with a grain particle moisture detection controller 41. The monitoring time in one detection process adapted to detect the 32 grain particles one at a time is altered by the detection moisture value to obtain an allowance time suitable for the detected moisture value thereby enabling better drying of the grain particles.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to a grain moisture detection control device for a grain dryer.

Conventional technology Conventionally, the monitoring time of the moisture detection process is as follows: A predetermined margin time and an actual detection time of sampling grains intermittently and detecting the grain moisture a predetermined number of times to obtain data for drying control.
This is a grain moisture detection control device that performs measurement and control within the same monitoring time from the beginning of drying to the end of drying.

Problems to be Solved by the Invention The grains being circulated and dried are, for example, 32 grains are crushed one by one for a predetermined margin time, and at the same time, the moisture value of the crushed grains is detected, The detected moisture value of these 32 grains is taken as the monitoring time of one moisture detection process, and the average value is calculated sequentially from the detected moisture values detected within this -moisture detection process monitoring time, and the average moisture value obtained by this calculation is is the displayed moisture value, but the monitoring time of this moisture detection process is the same from the beginning of drying to the end of drying. Therefore, if the monitoring time of moisture detection process is set to a long time, the grain moisture When the moisture content of grains is low, it is only necessary to detect the moisture content of 32 grains within this set long period of time, which may cause the grains to become over-dried, resulting in the formation of shells on the grains and deterioration of the quality of the grains. , and contrary to the above, if the setting is made for a short time, the grain loading may be poor when the grain moisture is high, so 32 grains will be reduced in moisture within the set short time. If such a situation occurs, the dryer must be stopped, which may reduce the efficiency of drying work.

Means for Solving the Problems This invention provides a moisture detection process in which drying control data is obtained through a predetermined margin time and an actual detection time in which grains are sampled intermittently and grain moisture is detected a predetermined number of times. A grain moisture detection control device for a grain dryer is characterized in that the moisture measurement control device controls the moisture measurement so that the monitoring time of the grains is gradually shortened as the grains dry.

Effect of the Invention As described above, the grains being dried are loaded one by one for 32 grains within the monitoring time of the moisture detection process, and the loaded grains are crushed under pressure, and at the same time, the moisture value of the crushed grains is determined. The average value is calculated sequentially from the detected moisture values of these 32 grains, and the average moisture value obtained by this calculation is used as the displayed moisture value.
The monitoring time of the moisture detection process, which is based on the actual detection time for grain detection and a predetermined margin time, is set to a long time when the moisture value of the grains to be dried is high, and as the grains dry. When the moisture value becomes low, the setting is controlled for a short period of time and the grain dries.

Effects of the Invention According to the present invention, errors in moisture measurement are reduced as drying progresses, and moisture detection is performed efficiently.
The margin time during the moisture detection process for detecting grain moisture can be shortened, and the monitoring time is successively set and controlled to shorten the time as the grain dries. is controlled in a short time in low moisture areas,
The grains do not become over-dried, and the high moisture range is controlled for a long time, improving the efficiency of drying operations.

Example On the park side, the machine wall (2) of the dryer (1) has a rectangular shape that is long in the front and back direction in plan view, and is made up of front and rear wall plates and left and right wall plates. A burner case (5) containing an operating device (3) for starting and stopping the burner (4) and a burner case (5) is installed on the rear wall plate.
6).

A storage chamber (7) is formed in the upper part of the machine wall (2), and below this storage chamber (7) there are drying chambers (9), (9) with a feeding valve (8) pivoted at the bottom. The drying chamber (
9) On the side, there is a hot air chamber (10), an exhaust chamber (11), (1
1), the hot air chamber (10) and the burner (4) communicate with each other, and the exhaust chambers (11), (11) and the exhaust fan (6) communicate with each other.
) are in communication with the drying chambers (9), (9).
A grain collection gutter (12) with a transfer spiral pivoted on the lower side is provided for communication, and a motor (13) is installed at the bottom of the rear wall plate.
A motor (13) is provided to rotate the transfer spiral, the delivery valves (8), (8), the exhaust fan (6), etc.

On the upper side of the storage chamber (7) there are ceiling plates (14), (14
) and a transfer gutter (15) equipped with a transfer spiral, and in the center of this transfer gutter (15), the transferred grains are transferred to the storage chamber (7).
It has a configuration in which a supply port is provided for supplying the inside, and a diffusion plate (1B) is provided below the supply port.

A grain raising machine (17) is provided in front of the front wall plate, and a packet conveyor (18) belt is stretched between the upper and lower pulleys inside, and a packet conveyor (18) belt is provided between the upper end and the starting end of the transfer gutter (15). A discharging pipe (19) is provided to communicate with the lower end and the grain collection gutter (19).
2) A supply gutter (20) is provided to communicate with the terminal end, and a motor (21) is provided on the top of the shell elevator (17), and this motor (21) moves the packet conveyor (18) belt. , the transfer spiral in the transfer trough (15) and the spreader plate (1
B) etc. is configured to rotate.

A moisture sensor (22) is provided at the vertical center of the grain raising machine (17), and this moisture sensor (22) receives grains that fall while being conveyed to the upper part by the packet conveyor (18). These grains are transferred one by one through the shallow spiral grooves (20) of the transfer roll (23), and the remaining grains leak through the deep spiral grooves (25) and are transferred to the transfer roll (23). The transferred grains are supplied onto the detection rolls (28) and (2B), and the detection rolls (28) and (2B) pulverize the grains with pressure and pressure on their outer peripheral surfaces, and at the same time detect the moisture content of the crushed grains. However, on the lower side of the detection rolls (2B), (2B) there are cleaning metals (27), (27) for removing the crushed grains for which moisture has been detected adhering to the detection ports (2B), (28).
27), and these cleaning metals (27) and (27
) A downflow gutter (28) is installed on the lower side, and a motor (29) is installed on the upper side.The motor (29) is rotated by sending an electrical measurement signal from the operation device R (3). The rotation of the motor (2B) causes this moisture sensor (2
Each part of 2) is configured to be rotationally driven to detect the moisture value of the grain.

A fuel pump (30) having a fuel valve is provided on the outside of the lower plate of the burner case (5).
) is configured to suck fuel from the fuel tank (31) and supply it into the burner (4), and the blower II (32) provided on the outside of the upper plate is rotationally driven by a motor (33). (32) is configured to supply combustion air into the burner (4).

The operating device ff1 ('3) is box-shaped, and the surface plate of the box includes a start switch (30) and a stop switch (35) for starting and stopping the dryer (1), and a finishing moisture value of the grains. Moisture setting shake (3EI) to set, bar (4)
Temperature setting sprinkler (37) that sets the temperature of the hot air generated from the
and the moisture sensor (22) and the hot air temperature sensor (3).
8) A display window (3) that alternately displays the detected values detected by
8), and inside thereof is a control device 2t (4G), a grain moisture detection control device fi (41), and a timer (42), and the moisture, temperature setting sprinkler (36), (3
7) is a rotary switch type, and this moisture setting knob (38) is configured so that the finishing moisture value is set when the grain moisture value to be finished is moved to the same position as the value displayed on the surface plate. The temperature setting machine (37) is configured such that the hot air temperature is set by operating the numerical value of the amount of grains supplied into the storage chamber (7) to the same position as the numerical value displayed on the surface plate. It is.

The grain moisture detection control device (41) includes the moisture sensor (
A-to-D converter (43) which A-to-D converts the detection value detected by 22), this A-to-D conversion 1! An input circuit (40) to which the converted value converted in (43) is input, an input circuit (45) to which the operation of the moisture setting hunting (3B) is input, input from each of these input circuits (40, (45)) CPtJ (4
8) The configuration includes an output circuit (47) that receives and outputs various commands from this CPtJ (4B).

The control device (40) is connected to the hot air temperature sensor (38).
an A-D converter that A-D converts the detected value detected by the A-D converter, an input circuit into which the converted value converted by the A-D converter is input, the start and stop switches (34) and (35), and the An input circuit into which the temperature setting adjustment (37) operation is input, the CPU (4B) which performs arithmetic and logical operations, comparison operations, etc. on various input values input from these input circuits, and this CPU.
This configuration includes an output circuit that receives and outputs various commands from U (48).

The operations of the temperature setting switch (37) and the start switch (30) are input to the control device (40), and the moisture setting switch (3) is input to the grain moisture detection control device ffi (41).
When the operation B) is input, the dryer (1) starts, and at the same time, the burner (4) and the moisture sensor (
22) is started, the supply roll (23) of this moisture sensor (22) transfers 32 grains one by one and supplies them onto the detection rolls (2B), (2B), and this detection roll The moisture value of the crushed grains is detected, the detection of these 32 grains is regarded as one detection process, and the detected moisture is detected in 4 processes. The average value of the values is calculated, and the average moisture value obtained by this calculation is used as the displayed moisture value. When 32 grain moisture is detected in the 5th process, the detected moisture value detected in the 1st process is is canceled, the average moisture value of the detected moisture values from the second to the fifth process is calculated, and the average moisture value obtained by this calculation is used as the displayed moisture value, and a new moisture value is detected and input. When the grain moisture detection control device (41
), this displayed moisture value is simultaneously displayed on the display window (39).

The displayed moisture value detected above is compared with the moisture value set and stored in the CPU (4B), and if the displayed moisture value is detected and input as 25% or more as set and stored, 32 grains The monitoring time for one detection process based on the actual detection time and allowance time for detecting moisture is, for example, 20 minutes and the timer (4
2), and if the moisture content of 32 grains is detected and input within 20 minutes of this setting, the moisture sensor (22)
is configured to detect that it is operating normally, and when the displayed moisture value is detected and input from the set and memorized 18% to 25%, it will detect the moisture content of 32 grains depending on the actual detection time and margin time. The monitoring time for one detection process is 10 minutes and the timer (
42), and if the moisture content of 32 grains is detected and input within 10 minutes of this setting, the corresponding moisture sensor (22)
is configured to detect that it is operating normally, and when the displayed moisture value is detected to be less than 18% as set and stored,
The monitoring time for one detection process based on the actual detection time and allowance time to detect the moisture content of 32 grains is 5 minutes and the timer (42
), and if the moisture content of 32 grains is detected and input within 5 minutes of this setting, the moisture sensor (22) is configured to detect that it is operating normally, and - monitoring of the detection process. If the moisture content of 32 grains or more is detected within the time, the grains of 32 or more will be cut, and within the monitoring time set and stored for each moisture value above, the moisture content of 32 grains will not be detected and input. The dryer (1) is configured to detect that a malfunction has occurred in the moisture sensor (22), stop the operation of the moisture sensor (22), and automatically stop the dryer (1) at the same time.

The moisture sensor (22) is connected to the moisture setting hole (3B).
When a grain moisture value that is the same as the finished moisture value set by operating the grain moisture value is detected, the grain moisture detection control device (41) automatically stops the dryer (1), and the burner (4 ) The temperature of the hot air generated from the hot air temperature sensor (
38), this detected hot air temperature is compared with the set hot air temperature set by operating the temperature setting machine (37), and if there is a difference, the temperature is set to be the same as the legal hot air temperature. The control device @ (40) controls the amount of fuel sucked by the fuel pump (30) by changing the number of times the fuel valve opens and closes.
This configuration is configured to change and control the amount of fuel supplied into the burner (4) by changing the amount of fuel.

Moisture and temperature setting machine of operating device (3), (3B),
(37) to the specified position and start switch (34).
), the dryer (1), moisture sensor (22) and burner (4) are started, and this burner (4)
Hot air is generated from the hot air chamber (lO), passes through the drying chamber (9), passes through the exhaust chamber (11), and is sent to the exhaust fan (6).
The grains stored in the storage chamber (7) are exposed to the hot air and dried while flowing down from the storage chamber (7) into the drying chamber (9), and then the grains are dried by the feeding valve (8). The grain is fed out to the lower part, flows down, and is supplied into the grain collection gutter (12), from which the grain is transferred via the supply gutter (20) and into the grain raising machine (17) by the lower transfer spiral. The packets are conveyed to the upper part by the packet conveyor (18), supplied into the transfer gutter (15) through the dispensing tube (19), and transferred onto the spreading plate (IB) by the transfer spiral in the transfer gutter (15). This diffuser (
16), the moisture sensor (22) is evenly diffused and reduced into the storage chamber (7), and is circulated and dried.
When a grain moisture value that is the same as the finished moisture value set by operating 8) is detected, the grain moisture detection control device 1 (41) of the operating device (3) automatically controls the dryer (1). Automatically stop.

During this drying work, the moisture sensor (22) detects the moisture content of 32 grains at a time based on the detected moisture value detected by the moisture sensor (22). The monitoring time of the detection process is controlled to a long time when the detected grain moisture value is a high moisture value, and to a short time when the detected grain moisture value is a low moisture value, and the moisture content of a predetermined 32 grains is detected within each of these predetermined times. Then, this moisture sensor (
If the moisture sensor (22) detects that it is operating normally and does not detect the moisture content of the predetermined 32 grains within each of these predetermined times, it is assumed that a malfunction has occurred in the moisture sensor (22), and the dryer ( 1) is automatically controlled and automatically stopped by the grain moisture detection control device (41).

By changing the monitoring time of this one detection process, which detects the moisture content of 32 grains one by one, depending on the detected moisture value,
The margin time is appropriate for the detected moisture value, allowing for good grain drying.

In addition, this grain-by-grain detection interval for detecting the moisture of 32 grains at a time is set and stored in the CPU (4B), for example, at intervals of 20 seconds, and the moisture setting knob (3B) is operated. If the set and memorized detection interval of 20 seconds is exceeded, the alarm system (at (48)
) may be configured to issue an alarm to prevent the detection interval from becoming longer than a predetermined value near the end of grain drying, thereby preventing over-drying of the grains.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention. FIG. 1 is an overall front view of the dryer partially cut away, FIG. 2 is an overall side view of the dryer partially cut away, and FIG. 3 is a block diagram. , Figure 4 is a flowchart diagram, Figure 5 is an enlarged side sectional view of the moisture sensor,
FIG. 6 is an enlarged rear view of the moisture sensor, and FIG. 7 is an enlarged front view of a portion of the dryer. In the figure, reference numeral (3) indicates an operating device, (22) a moisture sensor, and (41) a grain moisture detection control device.

Claims (1)

[Claims] The monitoring time of the moisture detection process, which is used as data for drying control after a predetermined margin time and the actual detection time of sampling the grain intermittently and detecting the grain moisture a predetermined number of times, is determined as the grain is dried. A grain moisture detection control device for a grain dryer, characterized in that the moisture measurement is controlled so as to sequentially shorten the moisture content.