JPS61285377A - 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, a moisture detection sensor detects the moisture in grains that are circulated down and dried in a drying chamber from a storage chamber, and when this moisture detection sensor detects a grain moisture value that is the same as the grain moisture value set, The method was to stop grain drying by controlling the drying #I machine to stop.

Problem to be Solved by the Invention While the grains housed in the storage chamber are circulated downward from the storage chamber into the drying chamber at the bottom, hot air generated from a burner is ventilated from the hot air chamber to the drying chamber, and the exhaust chamber is closed. Then, by sucking and exhausting air with an exhaust fan, the grains flowing down in the drying chamber are exposed to this hot air and dried, while a moisture detection sensor detects moisture in the drying grains. When a grain moisture value that is the same as the set grain moisture value is detected, dry MI!
For dryers that automatically stop and control the machine, depending on the outside air condition and the temperature of the hot air generated from the burner.

The temperature of the grains during drying increases abnormally, increasing the drying rate of the grains during drying, and this drying rate is 1% per hour for rice grains.
If the temperature exceeds the limit, grains may become shell-like or broken during drying.

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 moisture detection sensor (7) is provided that detects the moisture content of grains during circulation drying to detect the drying rate.
When the drying rate of the grains detected by the burner (3) is higher than the set grain drying rate, the hot air generated from the burner (3) is stopped to temporarily suspend the drying operation of the grains, and the detected grain drying rate is The grain drying is characterized in that a control device is installed and controlled to continue the hot air generated from the burner (3) to continue the grain drying operation when the grain drying rate is below the set grain drying rate. The grain drying control system of the machine is configured.

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). ), and is suctioned and exhausted by the exhaust fan (6), and is exposed to this hot air and dried.
During this drying work, the moisture detection sensor (7) detects the moisture drying rate of the grains being dried, and compares the detected grain drying rate with the set grain drying rate. When the grain drying rate is equal to or higher than the set grain drying rate, the control device temporarily stops the hot air temperature generated from the burner (3) and at the same time temporarily stops the dryer to perform the grain drying operation. After a temporary pause, the dryer is restarted by the control device to re-dry the grains. When the detected grain drying rate is less than or equal to the set grain drying rate, the control device does not temporarily stop the dryer but controls its continuous operation to dry the grains.

Effects of the Invention According to the present invention, the drying rate of grains detected by the moisture detection sensor (7) is compared with the set drying rate of grains, and based on this comparison, the dryer is temporarily stopped and the drying rate of the grains is controlled. By temporarily pausing the drying process or by operating the dryer continuously without pausing the drying process,
Even when the temperature of the grain during drying becomes high due to continuous drying of the grain, the grain drying rate can be detected by lowering the temperature of the grain during temporary rest. Since the grain drying rate does not exceed the set grain drying rate, grains do not develop shell side or breakage.

Embodiment In the illustrated example, the Al wall (9) of the dryer (8) 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. (8) and the operating device (10) that controls the start and stop of the model (
9) A moisture detection sensor (7) is detachably attached to detect the moisture content of the grains housed inside and detect the drying rate.

This model (9) is located at the center of the lower part and extends in the front and back direction, and is equipped with a V-shaped grain collection gutter (1
1), and on this grain collection gutter (11), drying chambers (2), (2) are formed vertically between the left and right ventilation mesh plates and communicated with each other,
The drying chambers (2), (2) have rotatably dispensing pulp (12), (12) rotatably supported at the bottom of the drying chambers (2).
), the grains are fed out 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 (13) provided in the front wall plate, and an exhaust chamber ( The hot air chamber (4) is formed on the inner wall of the rear wall plate in the hot air chamber (4) and communicates with the exhaust fan (6) provided on the rear wall plate. ) is provided with a hot air temperature detection sensor (14) for detecting the hot air temperature in the the transfer helix within, the delivery valve (12);
(12) and the exhaust fan (6), etc., are configured to be rotationally driven.

A fuel tank (16) is installed in the front part of the dryer (8), and the burner (3) is installed outside the lower wall plate of the burner case (13).
) is provided, and a fuel hose (17) is provided from the fuel tank (1B) to the fuel pump (17).
) and a fuel supply pipe to supply fuel into the burner (3), and the combustion air is generated by rotating a blower installed on the outside of the upper wall plate of the burner case (13) with a blower motor (1B). The structure is such that air is blown into the burner (3) through an air duct.

A storage chamber (1) is formed above the drying chambers (2), (2), and a ceiling plate (Ill), (18) is formed above the storage chamber (1).
) is provided with a transfer gutter (20) equipped with a transfer helix, and a supply port for supplying transferred grains into the storage chamber (1) is opened in the center of the transfer gutter (20). A diffuser panel (21) is installed at the bottom.

This diffusion plate (21) is configured to uniformly diffuse and return grains into the storage chamber (1).

The grain raising machine (22) is removably attached to the front part of the front wall plate,
Inside, a packet conveyor (23) belt is stretched between the upper and lower pulleys, and a dispensing tube (24) is provided between the upper end and the starting end of the transfer gutter (20) for communication.

A supply gutter (
A motor (2B) is provided on the upper side of the grain hoist (22), and this motor (28) is connected to the packet conveyor (23) belt and the packets in the transfer gutter (20). This is a configuration that rotationally drives a transfer helix and the like.

The moisture detection sensor (7) has a box shape, and a detection portion for detecting moisture in grains protrudes from inside the box.

This protruding detection part is installed in a state in which it protrudes from the front wall plate, and the grain flowing down inside the model (9) is crushed by this detection part under pressure, and at the same time, the water content of the crushed grain is detected. The moisture detection sensor (7) is configured to detect the drying loss rate per hour, and the moisture detection sensor (7) is actuated by the motor (37
) is rotationally driven to operate this moisture detection sensor (7).

The operating device (10) is box-shaped, and has a start switch (27), a stop switch (28), a target moisture setting hole (29), a hot air temperature setting hole (30), and a grain type setting hole on the surface. (31), etc., and a control device (31) inside.
2), and the control device (32) has the respective switches (27), (28) and the respective setting angles (2θ),
Input circuit (33) into which operations (30) and (31) are input
), A converting the detection values detected by the moisture detection sensor (7) and the hot air temperature detection sensor (14) from A to D;
-D converter (34), an input circuit (34) into which the converted value converted by this A-reverse converter (34) is input, and various input values input by these input circuits (34) and (30). The configuration includes a CPU (35) that performs arithmetic and logical operations and comparison operations, and an output circuit (36) that receives and outputs various commands issued by the CPU (35). detection sensor (7), the fuel pump (17) and various motors (15), (18),
(2B) etc. This is a configuration in which control such as starting and stopping is performed.

The CPU (35) compares the set grain moisture value set in the target moisture setting unit (29) with the detected grain moisture value detected by the moisture detection sensor (7), and determines the set grain moisture value. When the moisture detection sensor (7) detects the same grain moisture value, the dryer (8) is automatically stopped, and the detected grain moisture value is displayed on the surface of the operating device (10). It is configured to display on the window, and the moisture detection sensor (7
This CPU (35) detects the drying rate of the grain per hour based on the grain moisture value detected by the CPU (35).

The CPU (35) compares the detected grain drying rate with the set grain drying rate stored in the CPU (35),
When the detected grain drying rate is higher than the set grain drying rate,
This CPU (35) controls the dryer (8) to temporarily stop, and after the drying of the grains is temporarily stopped, the CPU (35) controls the restart of the dryer (8) to re-dry the grains. This is a configuration that allows In addition, if the detected grain drying rate is less than the set grain drying rate, this CPU (35) performs the drying process by $1 (
8) is configured to control continuous operation.

The CPU (35) controls the burner (3) so that the hot air temperature reaches the set hot air temperature set by the hot air temperature setting knob (30).
It is configured to control the fuel pump (1?) that supplies fuel into the burner, and the temperature of the hot air generated from the burner (3) is detected by the hot air temperature detection sensor (10), and is set as the detected hot air temperature. This CPU (3
5) controls the fuel pump (17) to control the burner (3).
This configuration controls the flow rate of fuel supplied into the fuel tank.

Each setting of the operating device (10) (29), (30), (
31) and the start switch (27), hot air is generated from the burner (3) provided on the front wall plate, and this hot air is discharged from the exhaust air 4) 1 (provided on the rear wall plate). By suctioning and exhausting air in 6), the drying room (
2) The grains, which are ventilated and stored in the model (9) of the dryer (8), are exposed to this hot air and dried while flowing down from the storage chamber (1) into the drying chamber (2), The grain is fed out to the lower part by the feeding valve (12), and transferred and discharged into the supply gutter (25) via the grain collection gutter (11) by the lower transfer helical, and the grain is raised to 411 (
22) to the upper part, and the upper transfer helix transfers it to the transfer gutter (
20) and onto a diffusion plate (21), where it is evenly diffused and returned into the storage chamber (1),
When the moisture detection sensor (7) detects a grain moisture value that is the same as the set grain moisture value set in the target moisture setting knob (29) of the operating device (10) after being circulated and dried, the operating device (10)
The dryer (8) is automatically controlled by the control device (32) of
automatically stops, but during this drying operation, the detected grain drying rate detected by the moisture detection sensor (7) and the operating device! ! (1
0) with the set grain drying rate stored in the control device (32), and if the detected grain drying rate is equal to or higher than the set grain drying rate, the control device (32) The dryer (8) is controlled to temporarily stop drying the grains, and then the dryer (8) is temporarily stopped.
8) is restart-controlled by the control device (32), and the grains are re-dried. If the detected grain drying rate is less than or equal to the set grain drying rate, the control device (32) continuously controls the dryer (8) to continuously dry the grains.

The drying rate of grains stored and dried in the model (9) is detected by the moisture detection sensor (7), and this detected grain drying rate is compared with a set grain drying rate. In comparison, the dryer (8) is controlled to temporarily stop or to operate continuously, so that the temperature of the grains during drying varies depending on the outside air condition, the temperature of the hot air generated from the burner (3), etc. Since there is no abnormal rise, grains do not develop shell side or breakage.

[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 partially cutaway side view, and Fig. 4 is a partially cutaway side view. FIG. 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 moisture detection sensor is shown.

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).
A ventilation chamber (5) is provided to suck and exhaust air with an exhaust fan (6), and the storage chamber (1) is equipped with a storage chamber (1) that detects the moisture content of the grains during circulation drying to detect the drying rate. Moisture detection sensor (7
), and when the drying rate of grain detected by this moisture detection sensor (7) is higher than the set grain drying rate, the burner (3)
The hot air generated from the burner (3) is stopped to temporarily suspend the grain drying operation, and when the detected grain drying rate is less than the set grain drying rate, the hot air generated from the burner (3) is continued to dry the grains. A grain drying control method for a grain dryer, characterized in that a control device is provided to control the drying operation so as to continue the drying operation.