JPH02187588A - Grain dry controller of grain dryer - Google Patents

Abstract

PURPOSE:To prevent an over-drying of grains through an arrangement of a stopping flue varying controller for varying a time of automatic stoppage of drying by a method wherein a correcting operation of a correcting device for use in correcting a detected moisture through a moisture measuring device is carried out. CONSTITUTION:As grains are to be dried, a moisture measuring device 1 detects the same moisture of the grains as that of the finished target moisture set by operating a moisture setting knob 33 or less than that value by two times, resulting in that an automatic controlling is carried out with a grain dry controller 36, the drying device 36 is automatically stopped and than the grain drying is terminated. When green rices or large amount of flying grains are mixed in the grains to be dried, a correcting device 2 is operated to a (-) numerical value. In turn, if the displayed amount of moisture is lower than the actual moisture content, the correcting device 2 is operated to (+) numerical value, a sensed moisture detected by the moisture measuring device 1 is corrected by a corrected numerical value set under an operation of the correcting device 2. If the corrected and detected grain moisture is the same as or less then the finished target moisture content, an automatic controlling is carried out with the grain dry controller 36 and the drying machine 3 is automatically stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to a grain drying III control device for a grain dryer.

Conventional technology In the past, the detected moisture detected by a moisture meter was corrected by a correction operation of a correction device, and even if this correction operation was performed, the drying automatic stop time was not changed.
For example, there was a grain drying control device that stopped drying when the grain moisture content was measured a predetermined number of times below the finishing target moisture content.

Problems to be Solved by the Invention For example, in a dryer that controls drying by attaching a moisture measuring device to a grain dryer, each part of the moisture measuring device is controlled by transmitting an electrical measurement signal during grain drying. After starting, some of the grains that are being dried while being stored in the dryer and being repeatedly circulated are fed from this dryer into this moisture measuring device, and 32 grains each are crushed under pressure. , the moisture content of this crushed grain is detected, the average value of the detected moisture content of these 32 grains is calculated, and the average moisture value of the 32 grains obtained by this calculation is taken as the detected grain moisture content at one time, and this detected grain moisture value is When the grain moisture equal to or less than the finishing target moisture is detected twice, the dryer is automatically stopped and the drying of the grains is stopped.

During this drying, if a large amount of green rice or fine grains are mixed into the grain to be dried, the moisture measuring device may detect a higher moisture content than the actual grain moisture. Therefore, when the dryer is stopped when the drying is finished,
There have been cases where grains have become over-dry and often appear on the body side, but in such cases, the detected grain moisture can be adjusted to the detected value by correcting the correction device that corrects the detected moisture detected by the moisture measuring device. The dryer was corrected to have a lower moisture content, but at the same time as this correction, if a grain moisture equal to or less than the finishing target moisture is detected once, the dryer will be automatically stopped and the grain The purpose is to stop the drying of grains and prevent overdrying of the grains.

Means for Solving the Problems The present invention provides a stop time change control device that changes the time for automatically stopping drying by a correction operation of a correction device (2) that corrects the detected moisture by a moisture measuring device (11). The structure of the grain drying control device for the grain dryer is as follows.

Effect of the Invention During drying of grains in a grain dryer, each part of the moisture measuring device (1) is started by sending an electrical measurement signal, and the moisture measuring device (1) is loaded into the dryer and circulated repeatedly to dry the grains. Some of the grains are fed from this dryer into this moisture meter (1),
- 32 grains are crushed under pressure, the moisture of the crushed grains is detected, the average value of the detected moisture of these 32 grains is calculated, and the average moisture value of the 32 grains obtained by this calculation is calculated once. If the detected grain moisture is equal to or less than the finishing target moisture twice, the dryer is automatically stopped and the drying of the grains is stopped. be done.

At the start of this drying, if the grain to be dried contains a large amount of green rice or grains, the detected grain moisture detected by the moisture meter (1) may be higher than the actual grain moisture. Therefore, in order to correct the detected grain moisture to low moisture, the correction device (2) is operated to detect the grain moisture, but this corrected detected grain moisture When a grain moisture equal to or less than the finishing target moisture is detected once, the dryer is automatically stopped and the drying of the grains is stopped.

Effects of the Invention According to the present invention, when the correction device (2) is operated to correct the detected grain moisture detected by the moisture measuring device +11 to a low moisture level, the grain moisture content is the same as the finishing target moisture content, or the grain moisture content is lower than the target moisture content. When grain moisture is detected once, the grain dryer is automatically stopped and the grain drying is stopped, so that the grain is stopped on the safe side without overdrying. The body side no longer becomes over-dry.

Example In addition, when rotating, the grain dryer (3) has a machine wall (4)
A storage chamber (5) is formed in the upper part, and below this storage chamber (5), a drying chamber (6) formed between ventilation networks is arranged in parallel and communicated with each other. A feed-out valve (7) for feeding and flowing down the grains is mounted on the shaft, and a grain collection gutter (8) equipped with a transfer spiral is provided on the lower side of each drying chamber (6) for communication. This dryer (3) is installed on the machine wall (4) of
The configuration includes an operating device (9) for starting and stopping the burner and a burner case (+1) containing a burner (1ω), and the rear wall (4) of the machine includes an exhaust fan (12) and a motor. (This motor is configured to rotate each of the delivery valves (7), the transfer spiral, the exhaust fan α, etc. in one drive.)

A hot air chamber 04+ is formed between the inner sides of the drying chambers (6) and communicated with the burner (In), and each of the drying chambers (6)
) A ventilation chamber (1!1) is formed on the outside and communicated with the ventilation fan, and a ceiling plate (
A transfer gutter (IG) and a transfer gutter (l) equipped with a transfer spiral are provided in the central part of the transfer gutter ((7).
), and a diffusion plate i18 is provided below this supply port.

A fuel pump tlcl having an electromagnetic valve is provided on the outside of the lower plate of the burner case tLD, and when the electromagnetic valve is opened and closed, the fuel pump (+9) pumps the fuel tank c! It is configured to suck fuel in O and supply it to the burner (1[I,
Further, a blower 1211 and a variable speed motor f2a are provided on the outside of the upper plate, and the blower (2
1) is rotationally driven, and this blower I21) supplies combustion air commensurate with the amount of fuel to be supplied to the burner (1ω).

The grain raising machine (to) is provided in the front part of the machine wall (4) on the front side,
Inside, a packet conveyor +24) belt is stretched between the upper and lower pulleys, and a dispensing tube (c) is provided between the upper end and the transfer gutter (1 force starting end) to communicate with the lower end and the collection gutter. A supply shaft is provided between the terminal end of the grain trough (8) and communicated with each other, and a motor (5) is provided on the upper part of the grain hoist (to), and this motor (5) operates the packet conveyor (24, The transfer gutter (17
It is configured to rotate and drive the transfer spiral and the diffusion plate (Ifl, etc.) in the packet conveyor C4, and a moisture measuring device (11) is provided at the center in the vertical direction. A roll Q1 that receives the grain and detects the grain;
At the same time, 32 grains are pulverized under pressure, one grain at a time.

It is configured to detect the moisture content of this crushed grain, and a motor 121 is provided in this moisture measuring device (1), and this motor C2
1 to rotate each part of this moisture measuring instrument (1).

The operating device (9) has a box shape, and the dryer (3) is mounted on the surface plate of the box, and includes a start switch O1 for starting the drying and discharging operations and a stop switch 0υ for stopping the drying machine. each hot air temperature setting setting point in which the temperature of the hot air generated from the burner (1) is set according to the operating position, and the moisture setting setting point 03 in which the finishing target moisture detected by the moisture measuring device (1) is set depending on the operating position; , this moisture meter (1
) corrects the detected moisture detected by the operating position (21), which displays the detected moisture detected by the moisture measuring device (1), the detected hot air temperature detected by the hot air temperature sensor (b), the remaining drying time, etc. The structure includes a display window 09 and a monitor display, etc., and therein is a grain drying control device comprising a stop time change control device that changes the automatic stop time of drying by the correction operation of the correction device (2). The configuration includes an OFi and a combustion control device (5), and each setting control (support), 03, and the correction device (2) are of a rotary switch type, and a predetermined value is set depending on the operating position. It is.

The grain drying control device port Q is connected to an A-D converter (to) that converts the detected value detected by the moisture measuring device (11) to A-D, and a converter converted by this A-D converter (to). The input circuit (to) into which the value is input, the input circuit (g) to which the operation of each switch OL, (3υ, the moisture setting control O3 and the correction device (2) is input, and each of these input circuits (to) ), C performs arithmetic and logical operations and comparison operations on various input values input from the cabinet.
This configuration includes an output circuit MZ that receives and outputs various commands from the CPU 441).

The combustion control device (2) is an A-D converter that performs A-D conversion on the detected value detected by the hot air temperature sensor (to).

An input circuit to which the converted value converted by this A-D converter is input, an input circuit to which the operations for each hot air temperature setting operation are input, and various input values input from these input circuits. The CPU that performs arithmetic and logical operations, comparison operations, etc.
f4+1, (7) This configuration includes an output circuit that receives and outputs various commands issued by the CPUHlt.

The drying control by the grain drying control device Oe is performed by the detection roll G! of the moisture measuring device +11. 1. When the grain moisture of 32 grains is detected one by one between +291 and input to the CPU Hυ, the average grain moisture of these 32 grains is calculated,
The average grain moisture of 32 grains obtained by this calculation is the one-time detected grain moisture.1 For example, the correction device (2) is operated to the O position, and the moisture setting setting value 03 is set to 14. When the operation is performed to position 5, the finishing target moisture content is set to 14.5%, and the moisture measuring device [11] detects grains with the same grain moisture content as this finishing target moisture content of 14.5% or less. 2 water
When the drying time is detected, the grain drying control device OQ automatically stops the dryer (3) and stops drying the grains. Further, when the correction device (2) is operated to the position of -0,5, for example, and this operation is input to the Cpusυ, the detected grain moisture detected by the moisture measuring device (1) is 15.0. %
is corrected by -0.5 to 14.5%, and this corrected 14.5% becomes the detected grain moisture, and at the same time, by operating the correction device (2) When the detected grain moisture is equal to or less than the finishing target moisture once, this grain drying control device [O
The dryer (3) is automatically stopped at G to stop drying the grains.

The operation to the value side of e of the correction device (2) is performed when a large amount of green rice or grains are mixed in the grains to be dried, and the operation to the value side of When the displayed moisture content is displayed lower than the actual moisture content when performing this, this difference in moisture content is corrected to the side.

Combustion control by the combustion control device is performed by comparing the detected hot air temperature detected by the hot air temperature sensor (to) and the set hot air temperature set by operating each of the hot air temperature settings (to), and determining whether there is a difference. The number of times the electromagnetic valve is opened and closed is controlled so that the temperature becomes the same as the set hot air temperature, and the amount of fuel sucked by the fuel pump Tl9) is controlled and supplied to the burner (10).

Hereinafter, the operation of the above embodiment will be explained.

At the same time, the grain dryer (3) is started by operating each setting of the operating device (9) to a predetermined position, and by operating the starting switch 0 [I to start drying.

The burner (101) and the moisture meter (1) are started, and hot air is generated from the burner noise.
The grains stored in the storage chamber (5) are exposed to the hot air and dried while flowing down from the storage chamber (5) into the drying chamber (6). Valve (7)
The grains are fed out to the lower part from inside the grain collection gutter (8), passed through the supply gutter Qe, and fed into the grain hoist j by the lower transfer spiral, and then transported to the upper part by the packet conveyor QI9 and transferred through the dumping tube. From this transfer gutter (1), it is transferred and supplied onto the diffusion plate fIEI by the upper transfer spiral, and is evenly diffused and reduced into the storage chamber (5) by this diffusion plate ti13,
After being circulated and dried, the moisture measuring device (1) is set to 0.
Is the grain moisture content the same as the finished target moisture content set in step 3?

Or, if the following grain moisture is detected twice, the operating device (9
) is automatically controlled by the grain drying control device OQ of the dryer [3
) will automatically stop the drying of the grains.

During this drying process, if a large amount of green rice or grains are mixed into the grains to be dried, operate the correction device [+21] to the value of e, and check the actual moisture content when drying last time. When the displayed moisture content is lower than that, the correction device (2) is operated to the numerical value side (■) to dry it, and the detected moisture detected by the moisture measuring device (1) is lowered by the operation of the correction device (2). The grain drying control device OQ automatically controls the dryer (3) when it is corrected by the set correction value and this corrected detected grain moisture is the same as the finished target moisture content or once below is detected. The drying of the grain is stopped.

As shown in Fig. 7, a drying rate setting mechanism for setting the drying rate is provided on the surface plate of the operating device H3, and when the drying rate setting mechanism is operated to an early position, the moisture content can be measured. At the same time, 64 grains are pulverized one by one between the detection rolls L''1m of the container +1), and at the same time, moisture in the crushed grains is detected and input to the CPU of the grain drying control device [4'j]. This 6
The average grain moisture of 4 grains is calculated, and the average grain moisture of 64 grains obtained by this calculation becomes the detected grain moisture at one time. When operated to a slow position, the average value of 32 grains is calculated as before, and the average grain moisture of the 32 grains obtained by this calculation becomes the detected grain moisture at one time.

When the drying rate setting knob 041 is operated to an early position, the set hot air temperature set by operating each hot air temperature setting knob is controlled to be 5 degrees higher, for example.

This is a configuration in which the drying rate is controlled to be 0.2% faster than the set drying rate. When the drying rate setting switch 6@ is operated to the normal position, the set hot air temperature set by operating the air temperature setting switch is not changed, and the drying rate is also not changed. In addition, when the drying rate setting knob is operated to a slow position, the set hot air temperature set by operating the air temperature setting knob is controlled to a 5 degree lower temperature, and the drying rate is set. This is a configuration in which the drying rate is controlled to be 0.2% slower than the drying rate.

By operating the drying rate setting tool to an early position,
When the hot air temperature is controlled to a high temperature and the grain drying rate becomes faster, in order to detect grain moisture more accurately, it is necessary to detect a large amount of grain moisture to reduce the variation in the average value. to obtain accurate grain moisture and prevent grain overdrying.

As shown in Fig. 8, the top plate of the operating device I) is equipped with a drying rate setting knob (capital) for setting the drying rate, and the bottom plate is equipped with an outside temperature sensor (capital) that detects the outside air temperature. The temperature of the hot air generated from the burner (Ill) is controlled so that the drying rate is the same as the set drying rate set by operating the drying rate setting knob (6). The grain drying control device a (g) of this operation device 44G is configured to calculate and store the average hot air temperature and average drying loss rate during the previous drying. At the start, if the amount of drying, grain moisture, outside air temperature, etc. are the same as the previous drying, the grain drying will start controlled by the average hot air temperature memorized from the previous drying. This is the configuration that will be used.

If the conditions are different between the previous drying and the current drying, the grain amount will be 2% based on the previous average hot air temperature.
Every time 00Kg increases or decreases, this average hot air temperature increases by 2 degrees,
Alternatively, the average hot air temperature is controlled to increase or decrease by 1 degree each time the grain moisture increases or decreases by 5%, or the average hot air temperature is controlled to decrease by 1 degree, and each time the outside air temperature increases or decreases by 5 degrees, This average hot air temperature is corrected to increase or decrease by 2 degrees, and the grains are dried at this corrected hot air temperature.

When the average hot air temperature from the previous drying is set and memorized, drying control is performed using the average hot air temperature stored in this setting, or drying control is performed with this average hot air temperature corrected based on this average hot air temperature. By doing so, the hot air temperature is not controlled to change significantly during the drying process, and therefore drying can be performed with a stable drying loss rate.

[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 an overall side view of the dryer that can be partially cut away, and Fig. 3 is a sectional view taken along line A-A in Fig. 2. FIG. 4 is an enlarged front view of a part of the dryer that can be partially cut away. Figure 5 is an enlarged side cross-sectional view of the moisture meter, Figure 6 is an enlarged rear view of the moisture meter, Figure 7 is an enlarged front view of a part of the dryer that can be partially broken away, and Figure 8 is a partially broken view. FIG. 2 is an enlarged front view of a portion of the dryer. In the figure, symbol (1) indicates a moisture measuring device, and symbol (2) indicates a correction device.

Claims (1)

[Claims] Grain drying control of a grain dryer comprising a stop time change control device that changes the automatic stop time of drying by a correction operation of a correction device (2) that corrects the moisture detected by a moisture measuring device (1). Device.