JPS61282783A - Control system of drying of cereal grain 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 grain drying control in a grain dryer.

Conventional technology In the past, grains to be dried were stored in a dryer, fed out from a storage chamber into the drying chamber, and dried while being exposed to hot air generated by a burner. This grain drying control system detects grain moisture and automatically stops the dryer when this moisture detection sensor detects a grain moisture value that is the same as the finishing target moisture value.

Problems to be Solved by the Invention While the grains housed in the storage chamber are fed out from the storage chamber into the drying chamber at the bottom and flowed down, hot air generated from a burner is flowed from the hot air chamber to the drying chamber, and an exhaust fan is used to By suctioning and exhausting air, the grains flowing down and circulating in the drying chamber are exposed to this hot air and dried, while the moisture detection sensor detects the moisture content of the drying grains, and the moisture value is the same as the finishing target set moisture value. In this dryer, which automatically stops the dryer when the moisture value of the grain is detected by the moisture detection sensor, the dryer automatically stops the dryer after the moisture detection sensor detects the grain moisture value that is the same as the finishing target moisture value. When the dryer is stopped, the temperature of the grains being dried is high and heat is radiated from the grains, so the drying of the grains progresses and the moisture value of the grains becomes lower than the target finishing moisture value. Further, due to the residual heat in the dryer, drying of the grains progresses, and the moisture value of the grains may become lower than the target moisture value set by several companies.

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 sucked and exhausted from the hot air chamber (4) through the drying chamber (2) and the exhaust chamber (5) by the exhaust fan (6). A grain temperature detection sensor (7) for detecting the temperature of the grains inside is provided, and an outside temperature detection sensor (8) for detecting the outside air temperature is provided in the storage chamber (1). ) is equipped with a moisture detection sensor (9) that detects the moisture in the grains during circulation drying.
), and when the detected grain moisture value detected by this moisture detection sensor (9) approaches the grain target setting moisture value, the detected grain temperature detected by the grain temperature detection sensor (7) and the outside of the range are set. The air temperature detection sensor (8) detects the temperature difference with the outside air temperature, and when the detected temperature difference is equal to or higher than the set temperature value, the hot air generated from the burner (3) is stopped and the exhaust fan ( 6), the ventilation drying operation is controlled to suck and exhaust air, and the moisture detection sensor (9) is also activated during this ventilation drying operation.
During the ventilation drying operation, if the moisture detection sensor (9) detects a grain moisture value that is less than the finishing target moisture value, the dryer is controlled to stop, and the dryer is stopped for the set time period. When the moisture value of the grains does not reach the finishing target set moisture value even after performing the ventilation drying operation, a control device is installed and controlled to restart the burner (3) in order to dry the grains with hot air again. The structure of the grain drying control system of the grain dryer is characterized by:

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). ), the grains are exposed to this hot air and are sucked and exhausted by the exhaust fan (6), drying them.
When the moisture value of the detected grain approaches the finishing target moisture value set and stored in the control device, a grain temperature detection sensor (7) detects the temperature of the grain during drying. ) detects the grain temperature during drying, and the outside temperature detection sensor (8) detects the outside air temperature, and the temperature detected by both segisers (7) and (8) is controlled accordingly. The detected temperature difference is compared with the set temperature value set and stored in the control device, and the detected temperature difference is higher than the set temperature. When the value exceeds the value, the control device stops the burner (3), stops the hot air generated from the burner (3), and controls the ventilation drying operation to suck and exhaust the air with the exhaust fan (6). The control device then switches and controls the grains to dry them through ventilation drying.

Even during this ventilation drying, the moisture in the grains is detected by the moisture detection sensor (9).
), and when this moisture detection sensor (9) detects a grain moisture value that is the same as the finishing target moisture value, the dryer is automatically controlled by the control device and is automatically stopped to dry the grains. will be stopped. If the moisture detection sensor (9) does not detect the moisture value of the grains that is the same as the finishing target moisture value even if the grains are subjected to the ventilation drying for the set time set and stored in the control device, the moisture detection sensor (9) The control device restarts and controls the burner (3), and the grains are exposed to hot air generated from the burner (3) and are dried with hot air.

Effects of the Invention According to the present invention, when the grain moisture value detected by the moisture detection sensor (9) approaches the finishing target moisture value, the grain is ventilated, and even if the ventilation drying is performed for a predetermined period of time, the grain is When the detection sensor (9) does not detect a grain moisture value that is the same as the finishing target moisture value, the grains are dried with hot air again, so that drying of the grains does not proceed due to heat radiation from the grains. Also, since drying of the grains does not proceed due to residual heat inside the dryer, the required finished target set moisture value can always be obtained, and the finished target set moisture value can also be obtained even after the ventilation drying for a predetermined period of time. When this is not the case, the drying efficiency of the grains will not be reduced by the hot air drying.

Embodiment In the illustrated example, the machine wall (11) of the dryer (lO) 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, and this front wall plate part has a wall (11) that is long in the front and rear direction. (10) is removably equipped with an operating device (12) that controls starting, stopping, etc., and a moisture detection sensor (9) that detects moisture in the grain flowing down inside the machine wall (11). .

Located in the center of the lower part of the machine wall (11) and extending in the front-rear direction, there is a grain collection gutter (1
3), and on this grain collection gutter (13), drying chambers (2), (2) are formed vertically between the left and right ventilation mesh plates and communicated with each other,
Rotatable delivery valves (14), (14) are pivotally supported at the bottom of the drying chambers (2), (2).
4) and (14), the grains are fed out from the drying chambers (2) and (2) and flowed down.

An inclined plate is provided at the upper part of each ventilation mesh plate, a partition plate is provided at the lower part, and a hot air chamber (4) is formed between the inner ventilation mesh plates,
It is configured to communicate with a burner (3) built into a burner case (15) provided in the front wall plate, and a ventilation chamber ( 5), (5)
is formed and communicated with the exhaust fan (6) provided in the rear wall plate section. A hot air temperature detection sensor (39) for detecting the hot air temperature in the hot air chamber (4) is provided on the inner wall of the rear wall plate in the hot air chamber (4), and a motor (39) is provided on the lower part of the rear wall plate. 1B), and this motor (16) operates the grain collecting trough (1B).
3) Transfer helix inside, said delivery valve (+4), (14)
It is configured to rotationally drive the exhaust fan (6) and the like.

A fuel tank (17) is installed at the front of the dryer (10), a fuel pump (18) is installed at the outer side of the upper wall plate of the burner case (15), and a fuel hose, Fuel is supplied into the burner (3) through the fuel pump (18) and fuel supply pipe, and the combustion air is supplied by a blower motor ( 18) to blow air into the burner (3) through the air duct.

A storage chamber (1) is formed above the drying chambers (2), (2), and ceiling plates (20), (20) are formed above the storage chamber (1).
A transfer gutter (21) equipped with a transfer helix is installed along the
The central part of this transfer gutter (21) stores the transferred grains in this storage chamber (
A supply port for supplying into the storage chamber (1) is opened, and a diffusion plate (22) is provided at the bottom of this supply port, and this diffusion 91 (22) uniformly diffuses and returns grains into the storage chamber (1). The inner wall of the rear wall plate of the storage chamber (1) is equipped with a grain temperature detection sensor (7) for detecting the temperature of the grains in the storage chamber (1).
).

The grain raising machine (23) is removably attached to the front part of the front wall board,
Inside, a packet conveyor (20 belts) is stretched between the upper and lower boos, and a dispensing cylinder (25) is provided between the upper end and the starting end of the transfer gutter (21) to communicate with the lower end. A supply gutter (26) is provided between the terminal end of the grain collecting gutter (13) and communicated with it, and a motor (27) is provided on the upper side of the grain hoist (23). 27) rotates the packet conveyor (23) belt and the transfer helix in the transfer gutter (21).

The moisture detection sensor (9) has a box shape, and a detection part for detecting moisture in grains is configured to protrude from inside the box, and the protruding detection part is in a state of protruding into the front wall board. The moisture detection sensor (9) is attached to the front wall plate and is configured to crush the grains flowing down the inside of the machine wall (11) under pressure with this detection part and at the same time detect moisture in the crushed grains.
The motor (2) inside the box is driven to rotate by sending an electrical measurement signal from the operating device (12), and the moisture detection sensor (9) is activated.

The operating device (12) is box-shaped, and the surface includes a start switch (29), a stop switch (30), a target moisture setting hole (31), a hot air temperature setting hole (32), and a grain type hole. (33), an outside temperature detection sensor (8) for detecting outside air temperature is provided on the outside of the bottom wall plate, and a control device (34) etc. is provided inside. is an input circuit (35) into which the operations of the switches (29), (30) and the respective stages (31), (32), and (33) are input, and the moisture detection sensor (
9), an A-D converter (3B) that converts each detection value detected by the grain temperature detection sensor (7), the outside temperature detection sensor (8), and the hot air temperature detection sensor (38) from A to D;
, an input circuit (35) into which the converted value converted by this A-D converter (36) is input, these input circuits (35),
A CPU (3?) that performs arithmetic and logical operations and comparison operations on various input values input in (35), and this CPU (37)
Output circuit (3) that outputs in response to various commands issued by
8), and this control device (34) controls the moisture detection sensor (9), the fuel pump (18), and each of the motors (16), (18), (27), (28).
This configuration controls the starting and stopping of the engine, etc.

When the finishing target moisture value set in the target moisture setting unit (31) is set to, for example, 14.5%, the CPU (3?) detects the moisture content of the grains being dried by the moisture detection sensor (9). is detected, and when this detected grain moisture value approaches 14.5% of the finishing target moisture value, this CPU (37)
The detected grain temperature value detected by the grain temperature detection sensor (7) is compared with the outside air temperature detected by the outside hot water tap sensor (8), and the temperature difference between the detected temperatures is detected. The temperature difference is compared with a set temperature value set and stored in the CPU (37), and if the detected temperature difference is greater than or equal to the set temperature value, the CPU (37) controls the fuel pump. At step (18), the fuel pump (18) that supplies fuel into the burner (3) is controlled to stop, so that no fuel is supplied and hot air is not generated from the burner (3), and the exhaust gas is controlled to stop. The structure is such that the grains are dried in a ventilation drying state in which air is sucked and exhausted by an air blower (6). Even during this ventilation drying, the moisture in the grains is detected by the moisture detection sensor (9). ) is the goal setting tool (
When the moisture detection sensor (9) detects the same grain moisture value as the finishing target moisture value set in step 31), the CPU
(37) automatically controls the drying 41! (10) is configured to automatically stop, and even if the moisture detection sensor (9) is dried by the ventilation for the set time set in the CPU (3?).
The moisture value of the grain that is the same as the finishing target moisture value set in the target moisture setting search (31) is detected by this moisture detection sensor (9).
) is not detected, this CPU (3?) restarts the fuel pump (18) and restarts the fuel pump (18).
8) restarting the supply of fuel into the burner (3),
The burner (3) generates hot air to dry the grains, and the grain moisture value detected by the moisture detection sensor (9) is determined by the display window on the surface of the operating device (12). This is the configuration displayed in .

The CPU (37) controls the burner (3) so that the hot air temperature reaches the set hot air temperature set by the hot air temperature setting knob (32).
It is configured to control the fuel pump (1B) that supplies fuel into the interior, and also detects the temperature of hot air generated from the burner (3) with the hot air temperature detection sensor (38), and compares the detected hot air temperature with the detected hot air temperature. Compare the set hot air temperature and
So that this detected hot air temperature is the same as the set hot air temperature,
The CPU (37) controls the fuel pump (18) to control the flow rate of fuel supplied into the burner (3).

Each setting of the operating device (12) (31), (32), (
33) and the start switch (29), hot air is generated from the burner (3) installed on the front wall plate, and this hot air is discharged by the exhaust fan (6) installed on the rear wall plate. The grains that are suctioned and exhausted, ventilated from the hot air chamber (4) to the drying chamber (2), and stored in the plate wall (11) of the dryer (10) are transferred from the storage chamber (1) to the drying chamber (2). The grain is exposed to this hot air and dried while flowing down the inside, and is delivered to the lower part by the delivery valve (14), and then passed through the collecting trough (13) by the lower transfer helix to the supply trough (2).
B), transported to the upper part by the hoisting machine (23), passed through the transport gutter (21) by the upper transport helix, and then transferred to the spreading plate (
22) The water is transferred to the top, is evenly diffused and returned to the storage chamber (1) by this diffusion plate (22), is circulated and dried, and is set by the target moisture setting kitsune (31) of the operating device (12). When the moisture detection sensor (9) detects the same grain moisture value as the finishing target setting moisture value, the control device fa of the operating device M (12) is activated.
(34) to automatically stop the dryer (1O), but during this drying operation, the detected grain moisture value detected by the moisture detection sensor (9) is not the same as the target moisture setting level (31).
), the grain temperature detection sensor (7) detects the temperature of the grains during drying, when the moisture value approaches the finishing target set moisture value set by operating the Also, the outside temperature detection sensor (8) detects the outside air temperature, and the control device (34) compares the detected temperatures detected by the re-detection sensors (7) and (8) to detect this temperature difference. , this detected temperature difference is compared with a set temperature value set and stored in the control device (34), and when the detected temperature difference is greater than the set temperature value, this control device (34) The fuel pump (18) is controlled to stop, the hot air generated from the burner (3) is stopped, and the ventilation drying operation is started in which the exhaust fan (6) sucks and exhausts the air, and the grains are ventilation-dried.

Even during this ventilation drying, the moisture in the grains is maintained by the moisture detection sensor (9).
), and when this moisture detection sensor (9) detects the moisture value of the grains that is the same as the moisture value set by several companies, the controller (34) automatically controls the dryer (10). is automatically stopped and the drying of the grain is stopped. The control device R (3
4) If the moisture detection sensor (9) does not detect the moisture value of the grains that is the same as the finishing target moisture value even if the grains are subjected to ventilation drying for the set time set and stored in 4), this control is performed. The fuel pump (18) is restart-controlled by the device (34), fuel is supplied into the burner (3), hot air is generated from the burner (3), and the grains are exposed to this hot air. and dried.

The grains housed in the plate wall (11) are detected by the moisture detection sensor (9), and when the moisture detection sensor (9) detects the moisture value of the grains approaching the finishing target moisture value. By drying the grains through ventilation or hot air drying, it is possible to always obtain the required finishing target moisture value.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention: Fig. 1 is a block diagram, Fig. 2 is a partially cutaway front view, Fig. 3 is a partially cutaway side view, and Fig. 4 is a dryer. It is an enlarged front view of a part. In the figure, (1) is the storage chamber, (2) is the drying chamber, (3) is the burner, (4) is the hot air chamber, (5) is the exhaust chamber, (6) is the exhaust fan, and (7) is the A grain temperature detection sensor, (8) an outside temperature detection sensor, and (9) a moisture detection sensor. Patent applicant name Masataka Iseki Representative of Iseki Agricultural Machinery Co., Ltd.

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).
The storage chamber (1) is provided with a grain temperature detection sensor (7) for detecting the temperature of grains during circulation drying. The storage chamber (1
) is an outside temperature detection sensor (8) that detects the outside temperature.
In addition, a moisture detection sensor (9) is provided in the storage chamber (1) to detect the moisture in the grains during circulation drying, and the detected grain moisture value detected by this moisture detection sensor (9) indicates the amount of moisture in the finished grains. When the target set moisture value is approached, the temperature difference between the grain temperature detected by the grain temperature detection sensor (7) and the outside air temperature detected by the outside temperature detection sensor (8) is detected, and this detected temperature difference is detected. When the temperature is higher than the set temperature value, the hot air generated from the burner (3) is stopped and the exhaust fan (
6) controls the ventilation drying operation to suction and exhaust air, and also during this ventilation drying operation, the moisture detection sensor (9) detects moisture in the grains.
) detects a grain moisture value that is less than the finishing target moisture value, it controls the dryer to stop, and even if the ventilation drying operation is performed for the set time, the grain moisture value does not reach the finishing target moisture value. A grain drying control method for a grain dryer, characterized in that a control device is provided to restart the burner (3) in order to dry the grains with hot air again when the grains are not dried with hot air.