JPS6269086A - 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] The present invention relates to a grain drying control method for a grain dryer.

Conventional technology In the past, grains stored in a storage chamber were fed out from the storage chamber into a drying chamber and flowed down, while hot air generated by a burner and a certain amount of drying air passing around the burner were removed using an exhaust fan. By sucking air into the drying chamber, the air is sucked and exhausted by the exhaust fan, and while the grains flowing down the drying chamber are exposed to this hot air and this drying air and dried, a moisture detection sensor is used to dry the grains. Detects the moisture value of the grain during this drying cycle,
The drying speed of the dried grains is detected based on this detected value, and this detected grain drying speed is compared with a set grain drying speed that is set and stored in the control device, and the detected grain drying speed is determined by the set grain drying speed. This was a grain drying control method in which the temperature of the hot air generated from the burner was changed and controlled by the control device so that the temperature was the same as the grain drying speed.

Problems to be Solved by the Invention The grains housed in the storage chamber can be removed from the drying chamber by sucking hot air descending from the storage chamber and a certain amount of drying air passing around the burner. The grains flowing through the drying chamber are exposed to the hot air and the drying air and dried, and a moisture detection sensor detects the moisture content of the grains during the drying circulation. Detect the value and
The drying speed of this grain is detected based on this detected value, and this detected grain drying speed is compared with a set grain drying speed that is set and stored in the control device, and the detected grain is In a grain drying control type dryer, the temperature of the hot air generated from the burner is changed to a high temperature or a low temperature by the control device so that the drying speed is the same as the detected grain drying speed. As the drying of the grains progresses, the density of the grains in the drying chamber becomes denser, so that the amount of drying air passing through the drying chamber decreases, and therefore the thermal efficiency in the drying chamber section decreases,
In order to prevent this decrease in thermal efficiency, the temperature of the hot air generated by the burner must be controlled to be higher than necessary, which may increase fuel consumption.

Means for Solving the Problems This invention provides a drying chamber (2) on the F side of a storage chamber (1) for storing grains, and hot air generated from a burner (3) blows through the drying chamber (2). The storage chamber (1) is equipped with a moisture detector for detecting moisture in the grains during circulation drying and detecting the drying speed of the grains. A sensor (5) is provided, and the suction wind state sucked and discharged by the exhaust air a (4) is controlled to be successively reduced from the early stage of grain drying to the time of grain finishing based on the detected moisture value detected by this moisture detection sensor (5). At the same time, a control device is provided to change and control the temperature of the hot air generated from the burner (3) so that the drying speed based on the detected moisture value detected by the moisture detection sensor (5) becomes the same as the set drying speed. The structure of the grain drying control system of the grain dryer is characterized by:

Effect of the invention The grains flowing down from the storage chamber (1) into the drying chamber (2) are exposed to the hot air generated from the burner (3) and the burner (3) section.
lf! The drying air passing through the drying chamber (2) passes through the exhaust fan (
The moisture value of the drying grains is detected by the moisture detection sensor (5), and the detected moisture value is detected by the moisture detection sensor (5). The drying speed of the grains during drying is detected based on the detected moisture value, and as the drying of the grains progresses based on the detected moisture value, the amount of suction drying air sucked and exhausted by the exhaust air @ (4) is gradually decreased. At the same time as the control, the detected grain drying speed is compared with a set grain drying speed set and stored in the control device, and the detected grain drying speed is faster than the set grain drying speed. Sometimes, the control device changes and controls the temperature of the hot air generated from the burner (3) to a low temperature,
Contrary to the above, when the detected grain drying speed is 8 times lower than the set grain drying speed, the control device changes the temperature of the hot air generated from the burner (3) to a high temperature. to dry the grains.

Effects of the Invention According to the present invention, as the moisture detection sensor (5) progresses, the amount of suction drying air sucked and discharged by the exhaust fan (4) is controlled to be gradually decreased. , the density of this grain in this drying chamber becomes dense,
As the amount of drying air passing through the drying chamber (2) decreases, the amount of drying air is sequentially decreased, so that a decrease in thermal efficiency in the drying chamber (2) can be prevented, so that the burner ( 3) Since the temperature of the hot air generated is not controlled to be higher than necessary, fuel consumption does not increase.

Embodiment In the illustrated example, the machine wall (7) of the dryer (6) has a rectangular shape in 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. 6) Detects the moisture value of the grain flowing down inside the operating device (8) that controls starting and stopping etc. and the machine wall (7), and detects the drying speed of the grain based on this detected moisture value. It has a structure in which a moisture detection sensor (5) is detachably attached.

A grain collecting trough (9) with a V-shape in front view and containing a rotating transfer spiral is provided between the grain collecting troughs (9), and above the grain collecting trough (9) there are vertically arranged drying chambers (2), (2) is provided and communicated,
At the bottom of these drying chambers (2), (2), there are rotatably supported delivery valves (10), (10) that feed and flow down the grains, and at the rear shaft end of the transfer spiral. The two-stage pulley (11) is fixed, and the delivery valve (10), (l
There are sprockets (12) and (12) on the rear shaft end of O).
) is fixed.

A hot air chamber (13) is formed inside the drying chambers (2), (2), and communicates with a burner (3) built in a burner case (14) provided in the front wall plate. There are air exhaust chambers (15), (15) formed between the outside of the drying chambers (2), (2) and the left and right wall plates, and an air exhaust fan (4) provided on the rear wall plate. ), and is configured to suck and exhaust dry air and hot air generated from the burner (3) from the outer peripheral portion of the burner (3). the hot air chamber (13) and the exhaust chamber (15);
(15) An inclined plate is provided on the upper side and a partition plate is provided on the lower side, and the inner wall of the rear wall plate in the hot air chamber (13) is
) The hot air temperature detection sensor (16
), a motor (17) and a gearbox are installed at the bottom of the rear wall plate, and a two-stage pulley (
18), the transmission device consists of a pulley (18) having a speed change gear and a sprocket (20), a two-stage pulley (18) of the motor (17) and a two-stage pulley (11) of the transfer spiral. A belt (21) is passed between the two-stage pulley (11) and the transmission pulley (19). The chain 7 (23) is connected to the sprockets ([2), (12) of the delivery valve (lO) and (10), and the two-stage pulley of the motor (17) 18) and a variable speed pulley (24) fixed to the shaft end of the exhaust air a(4), a belt (25) is passed between the belt (25) and the rear end of the belt (25). The wall plate part is equipped with a tension device that allows it to rotate freely! (2B) and a solenoid (27) for rotating this tension device (2B).
) The rotation of the exhaust fan (4) is accelerated or decelerated by the operation of the exhaust fan (4).

A fuel tank (28) is installed at the front of the dryer (6), a fuel pump (29) is installed at the outer side of the lower plate of the burner case (14), and a fuel hose (30) is installed from the fuel tank (28). ), the fuel pump (28) and the fuel supply pipe (3
The fuel is supplied into the burner (3) through the burner case (14), and the combustion air is generated by rotating a blower (32) provided on the outer side of the upper plate of the burner case (14) with a blower motor (33). , the air is blown into the burner (3) through the air duct (34).

A storage chamber (1) is formed above the drying chambers (2), (2), and ceiling plates (35), (35) are formed above the storage chamber (1).
), and a transfer gutter (313) with a built-in transfer spiral that rotates along the ceiling plates (35) and (35) is provided, and the central part of the transfer gutter (36) is for transferring grains. A supply port for supplying into the storage chamber (1) is opened, a diffusion plate (37) is provided below the supply port, and the rotation of the diffusion plate (37) causes the grains to be transferred to the grain raising machine (38). The front wall plate 111 is removably installed, and a packet conveyor (39) belt is stretched between the upper and lower boars inside, and a belt between the upper end and the starting end of the transfer gutter (36) is attached. A dispensing tube (40) is provided between them for communication, and a supply gutter (41) is provided between the lower end and the terminal end of the grain collection gutter (9) for communication.
38) A motor (42) is provided on the upper side, and this motor (42) rotates the bucket conveyor (39) belt, the transfer spiral in the transfer gutter (3G), the spreader plate (37), etc. It is the composition.

The moisture detection sensor (5) has a box shape, and a detection part for detecting moisture in grains is configured to protrude from inside the box. Attached to the front wall plate, a part of the grains flowing down inside the machine wall (7) is crushed under pressure by the detection part, and at the same time, the moisture value of the crushed grains is detected, and the detected value is used to detect the moisture content of the crushed grains. The moisture detection sensor (5) is configured to detect the drying speed of grains, and the moisture detection sensor (5) is configured to detect an electronic 7 which is transmitted at predetermined intervals from the operating device (8).
1111 constant signal], a motor installed in the channel body.
The moisture detection sensor (5) is activated when the sensor (43) rotates.

The operating device (8) is box-shaped, and the surface of the box includes a start switch (44), a stop switch (45), a target moisture setting device (4Ei), and a hot air temperature setting device (47).
and a display window, etc., and a control device (4B) etc. are provided inside, and this control device (48) includes the respective switches (44), (45), the respective setting switches (46), (47
), an A-D converter (50) that converts detected values detected by the moisture detection sensor (5) and the hot air temperature detection sensor (IB) from A to D.
, an input circuit (48) that inputs the converted value converted by this A-D converter (50), these input circuits (48), (
49) and a CPU (51) that performs arithmetic and logical operations, comparison operations, etc. on various input values input from the CPU (51).
) is an output circuit that receives various commands and outputs them.
52), etc., and these input circuits (48)
, (49), A-D converter (50), CPU (
51) and the output circuit (52) are connected, and this control device (48) controls each of the motors (17) and (33).
, (42), (43) This configuration controls the starting and stopping 11 of the solenoid (27), the fuel pump (29), etc.

When the moisture detection sensor (5) detects the finishing target moisture value and the grain moisture value set by operating the target moisture setting device (46), the control device (48) controls the dry blasting device. (6) is automatically stopped, and the detected moisture value detected by the moisture detection sensor (5) and the set moisture value set and stored in the control bag δ (48) are configured to automatically stop the moisture detection sensor (5). When the detected moisture value is the same as the set moisture value, the control device (48) operates the solenoid (27) to set the rotation speed of the exhaust fan (4) to a predetermined value; The exhaust fan (4) is configured to reduce the suction drying air by a predetermined amount, and as the moisture value of the grains decreases, the suction drying air is gradually reduced. This is a configuration that allows

The control device (48) controls the hot air temperature III' setting unit (
47) so that the set hot air temperature is reached.
This control device (48) controls the fuel pump (29) to control the amount of fuel supplied from this fuel pump (29) into the burner (3), and the hot air in the hot air chamber (1 day) is controlled. The temperature detection sensor (16) detects the temperature of the hot air generated from the burner (3), and the fuel pump (28) is controlled so that the detected hot air temperature and the set hot air temperature are the same, The moisture detection sensor (5) detects moisture in the grains, and based on this detected moisture value, the drying speed of the grains is detected by the control bag m (48). This control bag ff1 (48) compares the speed and the set grain drying speed set and stored in the control device (48), and if the detected grain drying speed is faster than the set grain drying speed. , the fuel pump (29) is controlled to reduce the amount of fuel supplied into the burner (3), and the temperature of the hot air generated from the burner (3) is changed to a low temperature; Conversely, if the detected grain drying speed is slower than the set grain drying speed, the fuel pump (29
) control 1-ri&, ('Js/'2) mountain+Iu Buddha-J-L'ah km +1, I'X
The temperature of the hot air generated from this burner (3) is changed to a high temperature by controlling L NTj Sn, and the operating device (8) alternately changes the hot air temperature and the grain moisture value.
It is configured to display on a display window on the front surface of the screen.

In addition, the said exhaust fan (4) and the said 7 drawer case (14)
An exhaust air circulation device is provided to connect the exhaust air circulation device to return the exhaust air, and an exhaust air temperature detection sensor for detecting the exhaust air temperature is provided in the exhaust air chamber (15) to detect the exhaust air temperature. When the detected exhaust air temperature detected by the sensor is high, the amount of exhaust air to be reduced may be increased to A, and contrary to the above, when the detected exhaust air temperature is low, the amount of exhaust air to be reduced may be reduced. . In addition, in a configuration provided with the exhaust air circulation I3:l equipment, when the detected moisture value detected by the moisture detection sensor (5) is a high wood value, the exhaust air μ is reduced.
It is also possible to use a configuration in which a small amount of the exhaust air is reduced, and contrary to the above-1, a configuration in which the amount of the exhaust air to be reduced is increased when the detected moisture value is a low moisture value.

By operating the setting devices (46) and (47) of the operating device (8) and operating the start switch (44), the dryer (6) is started and at the same time the burner installed on the front wall plate is activated. (3) Hot air is generated, and this hot air and this burner (3)
The drying air passing through the outer periphery of the dryer ( 6) Storage chamber (1
) The grains stored in the storage chamber (1) are exposed to this hot air and this drying air while flowing down into the drying chamber (2) and are dried, and then sent to the lower part by the delivery valve (10). The grains are fed out, transferred and discharged by the lower transfer spiral through the grain collection gutter (9) into the supply gutter (41), transported to the upper part by the grain hoist (38), and supplied into the transfer gutter (36). Diffusion via the transfer spiral in the transfer gutter (36)! (37) and is evenly diffused and reduced into the storage chamber (1) by this diffusion plate (37), and dried in a cyclic manner to achieve the finish set in 1] standard water setting and spreading (46). When the moisture detection sensor (5) detects the moisture value of the grains that is the same as the target moisture value, the operating device (8) c7-1 control device (48) automatically controls the dryer (6) to l:j. The movement stops.

During this drying work, as the detected moisture value detected by the moisture detection sensor (5) becomes a low moisture value, the discharged WL4
! ! (4) The control device (
At the same time, the control device (48) detects the grain drying rate based on the detected moisture value detected by the moisture detection sensor (5), and the detected grain drying rate and this The burner (3) is compared with the set grain drying speed set and stored in the control device 21 (48), and when the detected grain drying speed is faster than the set grain drying speed.
The temperature of the hot air generated is changed to a lower temperature (control 17), and the grains are dried so that the detected grain drying speed becomes the same as the set grain drying speed.

Contrary to the above, when the detected grain drying speed is lower than the set grain drying speed, the temperature of the hot air generated from the burner (3) is changed and controlled to a high temperature, so that the detected grain drying speed is lower than the set grain drying speed. Dry the grains to be the same as the set grain drying speed.

As the detected moisture value detected by the moisture detection sensor (5) becomes a low moisture value, the amount of dry air sucked and discharged by the exhaust fan (4) is controlled to be sequentially decreased, and at the same time, the moisture detection sensor (5) By changing and controlling the temperature of the hot air generated from the burner (3) so that the detected grain drying speed detected by the drying speed is the same as the set grain drying speed, the grains are always dried at a stable drying speed. At the same time, fuel consumption can be reduced.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Fig. 1 is a block diagram, Fig. 2 is a partially cutaway front view, Fig. 3 is a rear view, and Fig. 4 is a partially cutaway side view. FIG. 5 is an enlarged front view of a portion of the dryer. In the figure, reference numeral (1) indicates a storage chamber, (2) a drying chamber, (3) a burner, (4) an exhaust fan, and (5) a moisture detection sensor.

Claims (1)

[Claims] A drying chamber (2) is provided below the storage chamber (1) for storing grains, and hot air generated from a burner (3) is passed through the drying chamber (2) and sucked and exhausted by an exhaust fan (4). In addition, a moisture detection sensor (5) is provided in the storage chamber (1) for detecting moisture in the grains during circulation drying to detect the drying speed of the grains. Based on the detected moisture value detected by 5), the exhaust fan (
At the same time, the burner (3) is controlled so that the drying speed based on the detected moisture value detected by the moisture detection sensor (5) becomes the same as the set drying speed. A grain drying control system for a grain dryer characterized by being provided with a control device that changes and controls the temperature of the hot air generated.