JPS63163773A - 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 Conventionally, grains stored in a storage chamber are fed out from the storage chamber into a drying chamber by the rotation of a feed valve and flowed down, while hot air generated from a burner and outside air passing around the burner are fed into the drying chamber. The mixture becomes hot air for drying, and this hot air for drying is sucked by an exhaust fan and passed through the drying chamber, and the grains flowing down the drying chamber are exposed to this hot air and dried. From the start to the end of drying, the amount of grain fed out by the feeding valve and the amount of outside air sucked and exhausted by the exhaust fan were not changed, and drying was carried out at a constant amount.

Problems to be Solved by the Invention The grains stored in the storage chamber are fed out from the storage chamber into the drying chamber by the rotation of the feed valve and flowed down, while the hot air generated from the burner and the outside air passing around the The drying hot air is mixed with the wind to become drying hot air, and this drying hot air is sucked by an exhaust fan and passed through the drying chamber, and the grains flowing down the drying chamber are exposed to this drying hot air and dried. In this dryer, if the outside air temperature is low during this drying operation, the temperature of the grains to be dried will also be low, and the outside air sucked by the exhaust fan will also be at a low temperature, making it difficult for the grain temperature to rise. As a result, the drying speed decreases, and since the temperature of the sucked outside air is low, unless the temperature of the hot air generated from the burner is controlled to a high temperature, the temperature of the hot air for drying will not rise, resulting in a reduction in fuel consumption. This may result in a decrease in combustion efficiency.

Means for Solving the Problems This invention provides a system in which hot air generated from a burner (3) is placed on the lower side of a storage chamber (1) in which grains are stored, while the grains are fed out by a feeding valve (2) and flowed down. A drying chamber (5) is provided in which drying hot air mixed with outside air passing around the burner (3) is sucked and ventilated by an exhaust fan (4), and the temperature of the grains during drying is detected. In a dryer equipped with a grain temperature sensor (6) that detects the temperature of the outside air, and an outside air temperature sensor (7) that detects the outside air temperature, the detected grain temperature and the detected outside air temperature detected by each of these sensors (6) and (7) are predetermined. When a temperature lower than the temperature value is detected, the amount of air to be fed is reduced by the feeding valve (2), and at the same time, the amount of outside air sucked and discharged by the exhaust fan (4) is controlled to be reduced, and each sensor (6) , (7) is characterized in that a rotation control device is provided that restores and controls the delivery amount of the delivery valve (2) and the suction outside air air volume of the exhaust fan (4) upon detection of the predetermined temperature value or higher. The grain drying control method is used.

Effect of the Invention The grains stored in the storage chamber (1) are fed out from the storage chamber (1) into the drying chamber (5) by the rotational drive of the feed valve (2), and are generated from the burner (3). The hot air flowing through the burner (3) and the outside air passing around the burner (3) mix to form hot drying air, which is sucked by the exhaust fan (4) and ventilated through the drying room (5). The grains flowing down in the drying chamber (5) are exposed to this drying hot air and dried by repeating the cycle of drying.

During this drying work, the grain temperature sensor (6) detects the grain temperature of the grains during this circulation drying, and the outside air temperature sensor (7) detects the outside air temperature, and each of these detected values is below a predetermined value. If there is, the rotation of the blow-out valve (2) is controlled to a predetermined low speed rotation to reduce the amount of grain fed out by the feed-out valve (2), and at the same time the rotation of the blower (4) is controlled to a predetermined rotation speed. The grains are dried by controlling the rotation speed to be low and reducing the amount of outside air sucked in by this exhaust fan (4), and during this drying, the grain temperature sensor (6) and the outside air temperature sensor (7) are set to a predetermined value. When the above is detected, the rotation of the delivery valve (2) and the exhaust fan (4) is restored to the original rotation speed, and at the same time, the amount of delivery delivered by the delivery valve (2) is restored to the original speed, and at the same time, the exhaust amount is restored to the original number. Wind machine (4
) to dry the grains by restoring the amount of outside air sucked in.

Effects of the Invention According to this invention, if the detected grain temperature detected by the grain temperature sensor (6) and the detected outside air temperature detected by the outside air temperature sensor (7) are below a predetermined value, the feeding valve (2) feeds out the grain temperature. By controlling the amount of grains and the amount of outside air sucked in by the exhaust fan (4) to decrease.

The flow rate of the grains flowing down inside the drying chamber (5) becomes slower,
As a result, the time spent exposed to hot air for drying becomes longer! ! At the same time, the temperature rises faster and the drying speed of grains improves.
As the amount of low-temperature outside air sucked by the exhaust fan (4) decreases, the temperature of the hot air for drying increases even if the temperature of the hot air generated from the burner (3) is not controlled to a high temperature. This reduces fuel consumption and improves combustion efficiency.

Embodiment In the illustrated example, the machine wall (9) of the dryer (8) has a rectangular shape in a 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. 8) an operating device (10) for starting and stopping the burner (3);
The burner case (11) is equipped with a burner case (11), and an exhaust fan (4) is installed on the rear wall plate.

In the center of the lower part of the machine wall (9), extending in the front and back direction,
A grain collecting trough (12) equipped with a transfer spiral is provided, and a drying chamber (5) with a feed valve (2) pivoted at the bottom thereof is installed in parallel and communicated with the upper side of this grain collecting trough (12). Room (5), (
5) A hot air chamber (13) is formed between the burners (3) and
The drying chamber (5) is connected to the outside of the drying chamber (5).
14), (14) are formed and communicated with the exhaust fan (4), a hot air temperature sensor (15) is provided in the hot air chamber (13), and a motor is installed on the rear wall plate. (16) and a transmission (17), the motor (16) drives the transfer spiral, the delivery valves (2), (2) and the exhaust fan (4).
A belt is passed between the pulley (18) provided at the end of the shaft of the exhaust fan (4) and the variable speed pulley (19) provided at the end of the shaft of the motor (16). (20)
is tensioned by rotation of a tension device (21), and this tension device (21) is connected to a solenoid (
The exhaust fan (4) rotates when the exhaust fan (22) is operated.
) is configured to change speed between low speed and high speed rotation by the operation of the solenoid (22), and the speed change device (17) consists of a speed change pulley (23) and a sprocket (24), and the sprocket (24) and the delivery valve (2), (2) Each sprocket (25) provided at the end of the shaft is connected to a chino (2).
6), and the pulley (27) provided at the end of the shaft of the motor (16) and the two-stage pulley (27) provided at the end of the shaft of the transfer spiral.
A belt (29) is passed between the two-stage pulley (28) and the speed change pulley (28) of the transmission (17).
Between him and 3) is the belt (30) that Kake gave him.

It is configured to tension by rotating a tension device (31), and this tension device (31) is connected to a solenoid (32).
) is configured to rotate by the operation of the delivery valve (2).
), (2) is configured to change speed between low speed and high speed rotation by the operation of the solenoid (32), and this delivery valve (
2), this delivery valve (2) by the variable speed rotation of (2),
In (2), the amount of grains fed out and flowing down is changed.

A fuel pump (33) having a fuel valve is provided on the outer side of the lower plate of the burner case (11), and when the fuel valve is opened and closed, the fuel pump (33) sucks the fuel in the fuel tank (34) to supply the burner. (3) It has a configuration that supplies air inside, and a blower (35) and motor (36) are installed on the outside of the top plate.
The blower (35) is rotationally driven by the motor (36), and the blower (35) supplies combustion air into the burner (3). The outside air passing through the burner (3) and the hot air generated from the burner (3) are sucked and exhausted by the exhaust fan (4).

This outside air and this hot air are mixed and become hot air for drying.
Furthermore, the suction volume of outside air is changed by changing the speed of the exhaust fan (4).

A storage chamber (1) is formed above the drying chambers (5), (5), and ceiling plates (37), (37) are formed above the storage chamber (1).
) and a transfer gutter (38) equipped with a transfer spiral, and in the center of this transfer gutter (38), the transferred grains are transferred to this storage chamber (1).
A supply port is provided to supply the inside.

A diffusion plate (39) is provided below the supply port, and the front wall plate forming the storage chamber (1) is configured to store the amount of grains stored in the storage chamber (1). A window (40) for viewing is provided, and a numerical value indicating the storage capacity is provided on the side of the window (40).

A grain hoist (41) is provided in front of the front wall plate, and a packet conveyor (42) belt is stretched between the upper and lower pulleys inside, and a packet conveyor (42) belt is provided between the upper end and the starting end of the transfer gutter (38). A discharging tube (43) is provided to communicate with the lower end and the grain collection gutter (1).
2) A supply gutter (44) is provided to communicate with the terminal end, and a motor (45) is provided on the top of the grain hoist (41), and this motor (45) moves the packet conveyor (42) belt. , the transfer spiral in the transfer trough (38) and the spreader plate (3
9), etc., and a moisture sensor (46) is provided in the vertically central part, and the moisture sensor (46) detects the grains that fall while being conveyed to the upper part of the packet conveyor (42). 46) This moisture sensor (46)
The moisture sensor (46) is configured to detect the moisture value of the crushed grains at the same time as the crushed grains are crushed under pressure within the operating device. (10) transmits an electrical measurement signal at predetermined time intervals, a motor (47) provided in this moisture sensor (46) rotates, and the rotation of this motor (47) causes this moisture sensor (46) to rotate. Each part operates to detect the moisture value, and there is a grain temperature sensor ( 6).

The operation bag [(10) is box-shaped, and the surface plate of this box includes a start switch (48) for starting and stopping the dryer (8), a stop switch (49), and a target finish moisture content. A target moisture setting function (SO) for setting a value, a hot air temperature setting function (51) for setting a hot air temperature, a detected moisture value detected by the moisture sensor (46), and a detected moisture value detected by the hot air temperature sensor (15). A display window (52) is provided to alternately display the detected drying hot air temperature, an outside air temperature sensor (7) is provided on the outside of the lower plate to detect the outside air temperature, and a control device (62) and a rotation control device are installed inside. (63), each setting (50), (sl) is a rotary switch type, and this setting (50)
When operated to the position of the finish target value displayed on the surface plate, the finish target moisture value is set, and the setting value is set (51).
The structure is such that the temperature of the hot air generated from the burner (3) is set when the displayed numerical value of the grains stored in the storage chamber (1) is moved to the same position as the numerical value displayed on the surface plate.

The rotation control device (63) is connected to each of the sensors (6) and (7).
), the detection value detected by (15) is converted to A-D.
A D converter (53), an input circuit (54) into which the converted value converted by the A-D converter (53) is input, and an input circuit (55) into which the operation of the setting search (51) is input. , a CPU that performs arithmetic and logical operations, comparison operations, etc. on various input values input from these input circuits (54) and (55).
(56) This configuration includes an exit circuit (57) that receives and outputs various commands from the CPU (56).

The control device (62) includes an A-D converter (58) that converts the detection value detected by the moisture sensor (46) from A to D.
, an input circuit (59) into which the converted value converted by the A-D converter (58) is input, and each of the switches (48).
, (49) and an input circuit (60) into which the operation of the setting hunting (50) is input, and each of these input circuits (59)
), this CPU (56) performs arithmetic and logical operations, comparison operations, etc. on various input values input from (60).
The configuration includes an output circuit (61) that receives various commands from (56) and outputs them.

The rotation control device (63) inputs the operation of the start switch (48) and the setting adjustment (50) to the control device (62), and inputs the operation of the setting adjustment (51) to the rotation control device (63). When the operation is input, the hot air temperature generated from the burner (3) and the target finishing moisture value are input, and at the same time the dryer (8) is started, the set hot air temperature is generated from the burner (3). , and the moisture sensor (46)
is activated, the hot air temperature sensor (15) detects the drying hot air temperature in the hot air chamber (13), this detected drying hot air temperature is input, and the detected drying hot air temperature and the set hot air temperature are compared. If the hot air temperature is different, the number of times the fuel valve of the fuel pump (33) is opened and closed is changed so that the hot air temperature is the same as the set hot air temperature, and the fuel pump (33) sucks air into the burner (3). The grain temperature sensor (6) detects the grain temperature during circulation drying, and the detected grain temperature 1, for example, the CPU (56).
) is 20 degrees or less as set and stored in the CPU (56), and the outside air temperature sensor (7) detects the outside air temperature, and this detected outside temperature is 10 degrees or less as set and stored in the CPU (56). If so, each of the solenoids (22) and (32
) is activated, and the rotation of the delivery valves (2), (2) 4.
5r, p, m 3. Change to low speed rotation to lr, p, m,
This feed valve (2) reduces the amount of grain fed out and flows down, and the exhaust fan (4) rotates at 1800 r, p.
, m are changed to 160 Or, 20 m to slow rotation, and this exhaust fan (4) reduces the suction amount of outside air passing around the burner (3), and during this drying operation, the grain temperature When the detected grain temperature and the detected outside air temperature detected by the sensor (6) and the outside air temperature sensor (7) detect the set 20 degrees or more and 10 degrees or more, the respective solenoids (22)
, (23) are activated to restore the rotation of the external delivery valve (2) and the exhaust fan (4) to the original rotation speed, and each of these set values is the best value obtained from the test results. This is a configuration that stores numerical values.

Said control device l! (62) is the rotation control device (63)
), and when the operation of the start switch (48) and the setting switch (50) are input to this control device (62), the dryer (8)
Each of the motors (16), (36), (45).

(47) rotates and starts this dryer (8), and at the same time, the burner (3) and the moisture sensor (46) start, and this moisture sensor (46) detects the moisture value of the grains. When the detected moisture value is input and this moisture sensor (46) detects the same grain moisture value as the finishing target moisture value set by operating the setting (50), this control device (
62) to automatically stop the dryer (8).

Note that the detected grain temperature detected by the grain temperature sensor (6) is
When a set grain temperature of 20 degrees or less is detected, the feed valve (2
) to a low speed rotation, and when the outside air temperature detected by the outside air temperature sensor (7) detects a set outside air temperature of 10 degrees or less, the rotation of the exhaust fan (4) is controlled to a low speed rotation. It is also possible to configure an independent control system.

The dryer (8) is started and the burner (3
) and the moisture sensor (46) are activated, and this burner (3
) The hot air temperature set from the burner (3) and the outside air passing around this burner (3) are mixed to form drying hot air, and this drying hot air is passed from the hot air chamber (13) to the drying chamber (5) and exhausted. After passing through the chamber (14), the grains stored in the storage chamber (1) are sucked and exhausted by the exhaust fan (4), and the grains are dried while flowing from the storage chamber (1) through the drying chamber (5). The grains are dried by being exposed to hot air for drying, and are fed to the lower part by the delivery valve (2) and flowed down to be supplied into the grain collecting trough (12), and the grains are fed into the grain collecting trough (12) by the transfer spiral of this grain collecting trough (12). ) from the feed gutter (44) into the grain hoisting machine (41), and then the packet conveyor (4
2), and is transported to the upper part through the dispensing tube (43) and into the transfer gutter (3).
8) and is fed into the storage chamber (1) by the transfer spiral in this transfer gutter (38) via this transfer gutter (38) and onto the diffusion plate (39). The moisture sensor (46) is evenly diffused and reduced and circulated and dried.
When detecting a grain moisture value that is the same as the finishing target moisture value set by operating the setting device (50), the operating device (10)
The dryer (8) is automatically stopped under automatic control by the control device (62).

During this drying work, the outside air temperature detected by the outside air temperature sensor (7) is detected to be below a predetermined temperature value.

Furthermore, when the detected grain temperature detected by the grain temperature sensor (6) that detects the grain temperature during circulation drying is lower than a predetermined temperature value, the rotation control device (63) of the operating device (IO) turns on each solenoid (
22) and (32), each solenoid (22) is activated.
) and (32), the rotation of the feeding valve (2) is controlled to a low speed rotation, the amount of grain fed out by this feeding valve (2) is controlled to be reduced, and the rotation of the blower (4) is controlled to a low speed. Controlled to rotate at a low speed, the exhaust fan (4) reduces the suction volume of outside air passing around the burner (3) to dry the grains;
In addition, these grain temperature sensors (6) and outside air temperature sensors (7)
) detects a predetermined temperature or higher, the rotation of the feed valve (2) and the exhaust fan (4) is restored to the original rotation to dry the grains.

When the outside air temperature is low and the grain temperature during drying is low, the grain temperature will rise by reducing the amount of grain delivered and at the same time reducing the suction volume of the low-temperature outside air. Also, the temperature of the hot air for drying can be increased favorably, so that the drying speed of the grains does not decrease and the amount of fuel consumed does not increase.

[Brief explanation of the drawing]

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 an overall front view of the dryer partially cut away, and Fig. 4 is a diagram of the dryer. FIG. 5 is an overall rear view of the dryer, FIG. 5 is a partially sectional side view of the dryer, and FIG. 6 is an enlarged front view of a portion of the dryer. In the figure, code (1) is the storage chamber, (2) is the delivery valve, and (3) is the storage chamber.
) is the burner, (4) is the exhaust fan, (5) is the drying room, (6)
indicates a grain temperature sensor, and (7) indicates an outside air temperature sensor.

Claims (1)

[Claims] The lower side of the storage chamber (1) that stores the grains is filled with hot air generated from the burner (3) and outside air passing around the burner (3) while the grains are fed out by the feed valve (2) and flowed down. A drying room (5) is provided in which drying hot air mixed with the grains is sucked and ventilated by an exhaust fan (4), and a grain temperature sensor (6) is installed to detect the grain temperature of the grains during drying, and a grain temperature sensor (6) is installed to detect the temperature of the outside air. In a dryer equipped with an outside air temperature sensor (7) for detecting
The detected grain temperature detected by each of these sensors (6) and (7),
And at the same time, when the detected outside air temperature is detected to be lower than a predetermined temperature value, the amount of feedout from the feedout valve (2) is reduced.
The exhaust fan (4) controls the amount of sucked outside air to be sucked and exhausted, and when the sensors (6) and (7) detect a temperature equal to or higher than the predetermined temperature value, the feed-out amount of the feed-out valve (2) is controlled. A grain drying control system characterized in that a rotation control device is provided to restore and control the amount of outside air sucked by the exhaust fan (4).