JPS62177439A - Grain water detection system for grain drying machine - Google Patents

Abstract

PURPOSE:To dry grains stably at any time by providing an interval controller which shorten the operation time interval of a water sensor when a drying speed based upon the water detected value of the water sensor exceeds a set drying speed range. CONSTITUTION:Grains put in a drying machine are circulated downward in a drying chamber 2 repeatedly and dried by being exposed to a hot blast produced by a burner 1, and the water value of the grain in process of the circulation drying is detected by a water sensor 3 specific times to calculate the moving average value of the detected water values, and this calculated value is used as a detected water value to calculate the drying speed of the grains from the detected water value. When the calculated drying speed of the grains based upon the water value detection of the sensor 3 exceeds the set drying speed range, the temperature of the to blast produced by the burner 1 is controlled to lower temperature and while the grains are dried, the calculation time interval of the calculated drying speed based upon the water value of the sensor 3 is shortened, thereby drying the grains while calculating the drying speed of the grains. Thus, the grains are dried stably at any time.

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, while the grains are circulated in a drying chamber, the grains being exposed to hot air generated by a burner are dried, and a moisture sensor that operates at predetermined time intervals is used to dry the grains. The branch detection method was to detect the moisture value of the grain during circulation drying, calculate the moving average of the detected moisture value, and use this calculated value as the detected moisture value to detect the moisture value of the grain during circulation drying. .

Problems to be Solved by the Invention The grains housed in the dryer are repeatedly circulated in the drying chamber of the dryer and flowed down, while the grains in the flow are exposed to hot air generated from a burner and dried. , detect the moisture value of the grains during this circulation drying with a moisture sensor that operates at predetermined time intervals, calculate the moving average value of this detected moisture value, take this calculated Ida 1 as the detected moisture value, and use this detected moisture value. The drying speed of the grains is calculated, and when the calculated drying speed is larger than the set drying speed range, the temperature of the hot air generated from the burner is controlled to be lower. In a dryer that dries grains at a low temperature, if the calculation time interval of the calculated drying rate is a long time interval, such as an hourly interval, the grains will be dried at a high hot air temperature during this one hour period. As a result, the grains become over-dried, and the grains sometimes develop shell side or breakage.

Means for Solving the Problems This invention comprises a drying chamber (2) in which grains are dried by hot air from a burner (1) while flowing down, and a drying chamber (2) in which grains are dried by hot air from a burner (1).
2) The grains that are circulated and dried are operated at predetermined time intervals to detect the moisture value, the moving average value of the detected moisture values is calculated, and this calculated moisture value is used as the detected moisture value. Moisture sensor (3) to obtain the drying rate of this grain
), this moisture sensor (
A grain moisture detection method characterized by being provided with an interval control device that controls the interval between the operating surfaces of the moisture sensor (3) to be shortened when the drying rate based on the moisture detection in 3) is higher than the set drying rate range. The structure is as follows.

Effect of the Invention While the grains housed in the dryer are repeatedly circulated in the drying chamber (2), the grains in the flow are exposed to the hot air generated by the burner (1) and dried, while the moisture sensor (
3), the moisture value of the grains during this circulation drying is detected a predetermined number of times, the moving average value of this detected moisture (+1i) is calculated, this calculated value is used as the detected moisture value, and this detected moisture ((i) When the calculated drying speed of the grain based on the moisture value detected by the moisture sensor (3) is larger than the set drying speed range, the temperature of the hot air generated from the burner (1) is lowered. In a controlled manner, the burner (1)
At the same time, the temperature of the hot air generated by the moisture sensor (3) is changed to a low temperature to dry the grains, and at the same time, the time interval for calculating the calculated drying rate based on the moisture value of the moisture sensor (3) is changed and controlled to be shortened to dry the grains. Dry the grains before calculating the drying rate.

Effects of the Invention According to the present invention, when the calculated drying rate of grain based on the moisture value detected by the moisture sensor (3) is not within the set drying speed range but is greater than the set drying speed range, the moisture value of the moisture sensor (3) is The temperature of the hot air generated from the burner (1) decreases by 1.
By changing the control at 0 hours, the grains to be dried are not exposed to the high hot air temperature generated by the burner (1) for a long period of time, so the grains do not become overdried. , the grains do not turn to the side or break up.

Embodiment In the illustrated example, the machine wall (5) of the dryer (4) has a rectangular shape in plan view that is long in the front and back direction, and consists of one front and rear wall plate and one left and right wall plate. 4) is equipped with an operating device (6) for controlling starting, stopping, etc.

A grain collection gutter (7) with a built-in transfer spiral is provided between the machine wall (5) located in the center of the lower part and extending in the front and back direction;
This collected grain m (7) has a drying chamber (2), (
2) are provided and communicated with each other, and in the lower part of this drying chamber (2), there are dispensing pulp (8), (8) in which grains are dispensed and flowed down.
A hot air chamber (9) was formed inside the drying chamber (2), and was built into a burner case (lO) provided in the front wall plate. A temperature sensor (11) is provided in the hot air chamber (9) to detect the temperature of the hot air in the hot air chamber (9), and the drying chamber (2) is connected to the drying chamber (1). (2) Air exhaust chambers (12), (12) are formed between the outside and the left and right wall plates, and are communicated with an air exhaust fan (13) provided on the rear wall plate. A motor (14) is provided at the lower part of the rear wall plate, and the motor (14) rotationally drives the transfer spiral, the feeding 7<lube (8), (8), the exhaust fan (13), etc. A fuel pump (15) having fuel pulp is provided on the outer side of the lower plate of the burner case (lO), and when the fuel valve is opened and closed, the fuel pump (15) is used to pump the fuel tank (18).
The fuel inside is sucked in through the fuel hose.

This fuel pump (15) passes through the fuel supply pipe to the fuel pump (15).
1), and the burner case (10
) The blower (17) installed on the outside of the upper plate is connected to the blower motor (
18) and blows combustion air into the space (1) through a ventilation duct.

A storage chamber (18) is formed above the drying chambers (2), (2), and a ceiling plate (20), (
20) and a transfer gutter (21) with a built-in transfer spiral, and a supply port for supplying the transferred grains into the storage chamber (19) is provided in the center of the transfer gutter (21), and this supply A diffusion plate (22) is provided below the mouth, and this expansion plate (22)
2) is configured to uniformly diffuse and return grains into the storage chamber (18).

The grain raising machine (23) is attached to the front part of the front wall plate, and a packet conveyor (24) belt is stretched between the upper and lower pulleys inside, and a belt is placed between the upper end and the starting end of the transfer gutter (21). A dispensing tube (25) is provided and communicated with the lower end and the grain collection gutter (7).
A supply gutter (26) is provided between the grain raising machine (23) and the terminal end for communication, and a motor (27) is provided on the upper side of the grain hoist (23), and this motor (27) feeds the grain raising machine (23) to the grain raising machine (23). 24) Heald, the transfer spiral in the transfer trough (21) and the spreader plate (
22) etc. is configured to rotate.

A moisture sensor (3) is provided on the side of the grain raising machine (23), and this moisture sensor (3) is connected to the packet conveyor (23).
4) receives the grains that fall while being conveyed to the upper part, and supplies them to the moisture sensor (3), which crushes the supplied grains under pressure, and at the same time detects the moisture value of the crushed grains. The moving average of the moisture values is calculated, this calculated value is used as the detected moisture value, and the drying rate of the grain is detected, for example, every hour based on this detected moisture value. and the set drying speed, and if the detected drying speed is larger than the set drying speed range, the drying speed detection time interval is, for example, every 30 minutes, and the moisture sensor (3) By transmitting electrical measurement signals from the operating device (6) at predetermined time intervals,
A water dispenser motor (28) in this moisture sensor (3) rotates, and the rotation of this motor (28) operates each part of this moisture sensor (3) to detect the moisture value of grains.

The operating device (6) is box-shaped, and the surface plate of the box includes a start switch (29) for starting and stopping the dryer (4), a stop switch (30), and an i-grain finish. Target moisture setting tool (31) for setting target moisture;
The hot air temperature setting hole (33) for setting the hot air temperature and the detected moisture value detected by the moisture sensor (3) and the burner (
1) A display window that alternately displays the temperature of the hot air generated from the
33), and a control device (34) inside.
and an interval control device (35), and the control device (34) has an input to which the operations of the switches (29), (30) and the eight switches (31), (32) are input. a circuit (38), an A-D converter (37) that converts the detected value detected by the temperature sensor (11), and this A-D converter (37);
An input circuit (38) into which the converted value converted by the converter (37) is input, and the interval control device (35) performs A-to-D conversion of the detected value detected by the moisture sensor (3). (39), an input circuit (aO) into which the converted value converted by this A-D converter (39) is input, these control device (34) and interval control device H (35), each input circuit (
A CPU (41) that performs arithmetic and logical operations, comparison operations, etc. on various input values input from
), which is equipped with an output circuit (42) that receives various commands from this cptr (41) and outputs them.
The control device (34) and the interval control device (35) control the starting and stopping of each of the motors (14), (18), (27), and (28), and the fuel pump (15).
) is configured to start and stop the fuel pump (15) and to change and control the amount of fuel sucked in by this fuel pump (15).

The control device (34) controls the dryer (4) when the moisture sensor (3) detects a grain moisture value that is the same as the finishing target moisture value set by operating the moisture setting knob (31). )
It is configured to automatically stop the movement of the detected moisture value, and is configured to calculate the average value of the movement of this detected moisture value and use this calculated value as the detected moisture value. is configured to calculate the drying rate of the grain by comparing the detected moisture value detected after a predetermined time 1111, for example, one hour, and this calculated drying rate is set in the control device m (34). When the calculated drying speed is larger than the set drying speed range by comparing it with the stored drying speed setting.

The drying rate calculation time interval is controlled by the interval control device (35),
This is a configuration that is set and stored in the control device ffl (34), and is calculated by changing control at intervals of, for example, 30 minutes.

Also, when the calculated drying speed is larger than the set drying speed range,
The temperature of the hot air generated from the burner (1) is controlled by the control device (30) to reduce the number of opening and closing times of the fuel valve of the fuel pump (15) by a predetermined number of times set and stored in the control device (34). Then, the amount of fuel sucked by the fuel pump (15) is reduced and the temperature of the hot air generated from the burner (1) is changed to a lower temperature. When the speed is lower than the speed range, the temperature of the hot air generated from the burner (1) is changed to a high temperature by increasing the number of times the fuel pulp is opened and closed.

The control device (34) controls the hot air temperature setting device (32).
so that it is the same as the set hot air temperature that you set by operating
The temperature sensor (11) detects the hot air temperature in the hot air chamber (9), compares the detected hot air temperature and the set hot air temperature, and if they are different, controls the fuel pulp so that they are the same. However, when the calculation of the drying rate of grains based on the moisture value detected by the moisture sensor (3) is started, the temperature of the hot air generated from the burner (1) is controlled by the drying rate as described above. Temperature sensor (11
) detects the hot air temperature and this moisture sensor (3)
The moisture value detected by the sensor is alternately displayed on the display window (33).

In addition, a drying speed setting knob for setting the drying speed of grains is provided on the surface plate of the operating device (6).

When this gap is operated to a position where the drying speed becomes faster, in conjunction with this operation, the time interval for calculating the drying speed of grains based on the moisture value detected by the moisture sensor (3) becomes shorter.
Also, contrary to the above, if you operate it in a position that slows down the drying speed,
The time interval for calculating the grain drying rate may be increased in conjunction with this operation.

By operating the 6 holes (31) and (32) of the operation type 21 (6) and operating the start switch (28), the dryer 41 (4) starts and at the same time hot air is generated from the burner (1). The drying room (2) is ventilated from the hot air room (9) by sucking and exhausting the hot air with the air exhaust fan (13),
The grains accommodated in the dryer (4) are exposed to this hot air and dried while flowing down from the storage chamber (18) into the drying chamber (2), and are fed out to the lower part by the feeding valve (8). flowed down,
Grain is transferred and discharged by the lower transfer spiral into the supply gutter (2B) via the collection gutter (7), transported to the upper part by the bucket conveyor (24), and supplied into the transfer gutter (21), and then by the upper transfer spiral. It is transferred and supplied to the diffusion plate (22) through this transfer gutter (21), and is evenly diffused and returned to the storage chamber (18) by this diffusion plate (22), and is circulated and dried to reach the target moisture setting. When the moisture sensor (3) detects the same grain moisture value as the finishing target moisture value set in (31), the operation type 5!2
(6) The dryer (4) is automatically stopped under automatic control by the control device (34) and the interval control device (35).

During this drying work, the drying speed of the grain is calculated based on the grain moisture value detected by the moisture sensor (3), and this calculated drying speed and the settings set and stored in the control device (34) are calculated. When the drying speed is compared with the drying speed and the drying speed is larger than the set drying speed range, the calculation time interval for calculating the drying speed is changed to be shorter and the drying speed of the grain is calculated, and at the same time, the burner ( 1) The temperature of the hot air generated is changed to a low temperature and the grains are dried. Also, when the calculated drying speed is smaller than the set drying speed range.

The temperature of the hot air generated from the heath (1) is controlled to be high to dry the grains.

When the calculated drying speed of the grains is larger than the set drying speed range, stable drying of the grains can always be obtained by controlling and changing the calculation time interval of the calculated drying speed to be short.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a block diagram, Fig. 2 is a flowchart, Fig. 3 is a partially sectional front view of the dryer, and Fig. 4 is a partially sectional view. A side view of the dryer, FIG. 5 is an enlarged front view of a portion of the dryer. In the figure, reference numeral (1) indicates a burner, (2) indicates a drying chamber, and (3) indicates a moisture sensor.

Claims (1)

[Claims] A drying chamber (2) in which the grains are dried by hot air from a burner (1) while flowing down, and the moisture value is detected by operating the grains that are circulated to this drying chamber (2) and dried at predetermined time intervals. This grain dryer is equipped with a moisture sensor (3) that calculates a moving average value of the detected moisture value of grains, uses this calculated moisture value as the detected moisture value, and obtains the drying rate of the grain based on the detected moisture value. The grain moisture content is characterized by being provided with an interval control device that controls the operating time interval of the moisture sensor (3) to be shortened when the drying rate based on moisture detection by the moisture sensor (3) is higher than the set drying rate range. Detection method.