JPS61235679A - Control system of drying of cereal grain - 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.

Conventional technology Conventionally, when controlling drying by detecting the moisture of grains during drying with a moisture detection sensor, this detected grain moisture value is compared with a reference dry moisture value, and this reference dry moisture value is determined. This method performs drying control by calculating the average value of only the detected grain moisture value i, which is within the range of This method does not involve changing the value or changing the allowable range, but rather controls the drying of grains using the reference dry moisture value that is always constant.

Problems to be Solved by the Invention While the grains housed in the dryer are circulated downwards,
While drying by exposing to hot air generated from a burner, part of the circulating grains is compressed and crushed using the moisture detection part of the moisture sensor, and moisture is detected, and the detected grain moisture value and the standard drying In this method, drying is controlled by comparing the detected grain moisture values with the standard dry moisture value and calculating the average value of the detected grain moisture values that are only within the range of this standard dry moisture value. When stored and dried simultaneously in the dryer,
For example, when the moisture content of grains with high moisture content is detected, it is judged that the moisture content is not within the range of the reference dry moisture value and is processed to be cut, and only the detected grains with low moisture content II'8 are calculated from the average value and drying is controlled. Therefore, by the time drying is finished, grains with high moisture content may be undried.

Means for Solving the Problems This invention calculates the water content ΔIII for each fixed number of grains at predetermined time intervals.
The moisture value detected by the moisture sensor (1), which determines the moisture content a certain number of times, is compared with the reference dry moisture value.
(Detected moisture only within the range of semi-dry moisture values ((By calculating the average value of 6 and updating it as a new standard dry moisture value, it can be used as a drying control standard for grains, and the standard dry moisture value A grain drying control system is configured in which the permissible difference to be obtained is controlled to be changed as appropriate depending on the number of detected moisture values exceeding a reference dry moisture value when compared with each moisture value.

Functions and Effects of the Invention The grains housed in the dryer are allowed to flow down inside the drying chamber while hot air generated from a burner is passed through the drying chamber.
The grains flowing down the drying chamber are exposed to this hot air and dried by sucking it with an air fan. At a predetermined time interval, a certain number of grains are crushed under pressure for a certain number of times, moisture is detected at the same time, and this detected grain moisture value is compared with a reference dry moisture value, and this reference dry moisture value is set to, for example, 22±1.
If it is set to 0%, detected moisture values outside the 21-23% range are cut, the f average value of the detected moisture values within the 21-23% range is calculated, and this average value is used as the new standard dry moisture value. The new standard dry moisture value is updated as the grain drying control standard, and for example, the updated new standard dry moisture value is set to 21.8%±1.
If it is set to 0, this updated standard dry moisture value of 20.8~
If the detected moisture value other than 22.8% is more than the predetermined number of times,
This standard dry moisture content (/421.8±1°0%) is changed to, for example, 21.8±1.5% to control the dryness of the grains.

Conventionally, when controlling the drying by detecting the moisture content of grains during drying with the moisture sensor (1), the detected grain moisture value is compared with a reference dry moisture value, and this reference dry moisture value is determined. This method performs drying control by calculating the average value of only the grain moisture values within the range of , and depending on the number of times the detected grain moisture value detected by the moisture sensor (1) is outside the allowable range,
The method was not to change the standard dry moisture value or change the allowable range, but to always control with a constant standard dry moisture value, but with this invention, the moisture sensor (
Compare the detected grain moisture value detected by 1) with the standard dry moisture value, calculate the average value of only the grain moisture values that are within the range of this standard dry moisture value, and create a new standard dry moisture value. Furthermore, depending on the number of times grain moisture values are detected that exceed the allowable range of the new standard dry moisture value, drying is controlled by changing this allowable range. Even when the moisture content of high-moisture grains is detected, the drying is controlled even with this detected moisture value, so the high-moisture grains will not become undried.

Embodiment In the illustrated example, the machine wall (3) of the dryer (2) 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, and the top of this machine wall (3) has a ceiling. Board (4), (4)
An operating device (5) and a moisture sensor (1) are detachably attached to the front wall plate.

Located at the center of the lower part of the machine wall (3) and extending in the longitudinal direction, there is provided a grain collecting room (7) which is V-shaped in front view and has a transfer helix (6) inside. ) On the upper side, drying chambers (8), (8) are formed and communicated between the left and right ventilation mesh plates, and in the lower part of the drying chambers (8), (8), grains are stored in the drying chambers (8), (8).
(8) Rotatable feeding valve (9) that feeds out from (9)
This is a configuration with a

A hot air chamber (lO) is formed between the inner ventilation mesh plates and communicates with a burner (12) built in a burner case (11) provided in the front wall plate, and the outer ventilation mesh An air exhaust chamber (13) is formed between the board and the left and right wall plates, and communicates with an air exhaust fan (14) provided at the rear wall plate. A motor (15) is provided, and the motor (15) operates the transfer helix (6), the delivery valve (9),
(9) and the exhaust fan (14), etc., are configured to be rotationally driven.

A fuel tank is provided at the front of the dryer (2), and a fuel pump (IC) is provided outside the lower wall plate of the burner case (11).
16) and a combustion fuel 1 supply pipe, the combustion fuel 1 is supplied into the burner (12), and the burner case (
l 1 ) A blower, a blower NL machine feeder (17), is provided on the outside of the wall plate, and is configured to send combustion air for combustion into the burner (12) through a blower duct.

A storage chamber (18) is formed above the drying chambers (8), (8), and the ceiling plate (4) on the 1- side of this storage chamber (18)
, (4) A partial transfer gutter with a transfer helix installed (
19), and in the center of this one part transfer gutter (18) there is a supply [1] for supplying the transferred grains into this storage chamber (18), and at the bottom there is a diffusion plate. (20) is provided,
This diffusion plate (2o) is configured to uniformly diffuse and return grains into the storage chamber (18).

A grain machine (21) is removably attached to the front wall board,
Inside, two brush conveyor belts (22) are stretched between two lower pulleys, and a dispensing cylinder (23) is provided between the lower end and the upper transfer gutter (19) for communication. A supply gutter (24) is provided between the lower end and the terminal end of the grain collection gutter (7) for communication, and a motor (3) is provided on the upper side of the grain machine A (21).
4), and this motor (34) drives the upper transfer gutter (19).
) in which the transport helix and the packet conveyor (22) belt are rotated.

The moisture sensor (1) has a box shape, and a feeding part (35) for feeding grains projects from the inside of the box, and this projecting feeding part (35) projects into the front wall board. Put it on,
The grains flowing down inside the machine wall (3) are fed into the feeding section (35) and a constant number of grains are fed into the moisture detection section (36) inside the box, and the moisture detection section (38) At the same time as crushing under pressure, the moisture content of the crushed grains is measured a certain number of times, and these feeding parts (35), moisture detection parts (3B), etc. The moisture sensor (1) is configured to be operated and controlled by measurement signals transmitted at predetermined time intervals from the operating device (5).

The operating device (5) is box-shaped, and has a start switch (25), a stop switch (2B), a standard water setting hole (27), a hot air temperature setting hole (28), etc. on the surface. , has a control device (29) inside, and the control device (29) operates the switches (25), (26) and the setting knobs (27), (28) manually. an input circuit (30), an A-D converter (31) that converts the detected value detected by the moisture sensor (1), and a converted value converted by the A-D converter (31). Input circuit (30) to be inputted, these input circuits (30), (3
o) A CPU (32) that performs arithmetic and logical operations and comparison operations on various input values input from
The control device (28) controls the fuel pump (16), the moisture sensor (1), and the various motors (15) and (17). ), (34), (37), etc. are controlled such as starting and stopping.

The CPU (32) compares the set value set in the target moisture setting unit (27) with the detected value detected by the moisture sensor (1), and sets the same grain moisture value as the set value to the moisture sensor (1). 1), the dryer (2) is automatically stopped when detected by the moisture sensor (1), and the grain moisture value detected by the moisture sensor (1) and the reference dry moisture value stored in the CPU (32) are For example, if the memorized reference dry moisture value is 22±1.0%, detected grain moisture values outside the 21-23% range are cut and are within the 21-23% range. The average value of the detected grain moisture values is calculated, this average value is updated to a new standard dry moisture value, and the grain drying is controlled as the new standard dry moisture value of the grain drying control standard. If the new standard dry moisture value is 21.8 ± 1.0%, then the updated standard dry moisture value of 20.8 to 2
If a detected grain moisture value other than 2.8% is detected a predetermined number of times or more, the allowable range of this standard dry moisture value of 21.8 ± 1.0% is changed to 21.8 ± 1.5. The CPU (32) controls the fuel pump (16) so that the hot air temperature reaches the temperature set by the hot air temperature setting knob (28) at the start of the drying operation. ) to control the combustion fuel supplied into the burner (12).

The moisture detection unit (36) reads the voltage when the grains are crushed under pressure, and this voltage is used as the moisture value of the grains. Restarting the moisture detection section (36) after a predetermined pressure period after detection,
The structure may be such that the peak value of the voltage is read and this voltage is used as the grain moisture value.

By operating the operating device (5), the hot air generated from the burner (12) provided on the front wall plate is sucked and exhausted by the exhaust fan (14) provided on the rear wall plate, and the hot air chamber (10) The drying chamber (8) is ventilated, and the grains stored in the wall (3) of the dryer (2) are exposed to this hot air while flowing down the drying chamber (8) and are dried. The grain is fed to the lower part by the valve (9), transferred and discharged into the supply gutter (24) by the transfer helix (6), transported to the upper part by the hoisting machine (21), and transferred to the diffusion plate (20) by the upper transfer helix. This diffusion plate (2
0), it is evenly diffused and reduced into the storage chamber (18), and is circulated and dried to set the target moisture content in the operating device (5) (27).
The moisture sensor (
1), the dryer (2) is automatically controlled by the operating device (5) and automatically stops, but during this drying operation, the grain moisture value detected by the moisture sensor (1) and the control device are automatically controlled. (2
8) The average value of only the detected grain moisture values within the range of the standard dry moisture value is compared with the standard dry moisture value stored in 8), and this calculated average value becomes the new standard dry moisture value. The drying of grains is controlled without being updated, and when the detected grain moisture value outside the range of this updated standard dry moisture value exceeds a predetermined number of times, the allowable range of this standard dry moisture value becomes wider. The grains are dried under update control by the control device (29).

The detected grain moisture value detected by the moisture sensor (1) is compared with the reference dry moisture value, and the reference dry moisture value is changed, or the allowable range of this reference dry moisture value is changed, and the grain is Since it is dried, even when high-moisture grains and low-moisture grains are dried at the same time, high-moisture grains do not become undried.

[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 partially sectional side view, Fig. 3 is a front view, and Fig. 4 is a partially enlarged front view. , FIG. 5 is a side sectional view of the moisture sensor. In the figure, code (1) indicates a moisture sensor.

Claims (1)

[Claims] This detected moisture value by the moisture sensor (1), which measures the moisture content of a certain number of grains a certain number of times at a predetermined time interval, is compared with a reference dry moisture value, and a detected moisture value that is only within the range of this reference dry moisture value is determined. By calculating the average value of and updating it as a new standard dry moisture value, it can be used as a grain drying control standard, and the allowable difference that should be the standard dry moisture value can be calculated when compared with each moisture value. A grain drying control system that controls the drying of grains by appropriately changing the number of times a detected moisture value exceeds a reference dry moisture value.