JPH0439590A - Control system for drying in grain drying machine - Google Patents

Abstract

PURPOSE:To prevent the deterioration as well as the degradation of grain by a method wherein the fatty material content of the grain to be dried is detected by a fatty material sensor and the detected fatty material content is inputted. CONSTITUTION:A fatty material sensor 5 is connected to an operating device 19 to detect the fatty material content of grain to be dried. The fatty material content, indicated in an indicating unit 37, is set by operating a fatty material setting device 6. The finishing target moisture, set by operating a moisture setting device 34, is corrected and a new finishing target moisture for the grain is set. Simultaneously, respective parts of a grain drying machine 7, a hot air device 2, a moisture sensor 4 and the like are started and hot air for drying is generated. The hot air is diffused evenly into a reserving chamber 11 by a diffusion board 25 to circulate and dry the grain and when the moisture sensor 4 has detected the moisture of the grain, which is same as the corrected and set finishing target moisture, the drying machine 7 is stopped automatically by the automatic control of a drying control device 44 in an operating device 19 whereby the drying of the grains is stopped.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a drying control method for a grain dryer.

Conventional technology Conventionally, grains stored in a grain drying chamber of a grain dryer are fed out and flowed down inside the drying chamber, while dry hot air generated from a hot air device passes through the drying chamber and is sent to an exhaust fan. The grains flowing down the drying chamber are exposed to this hot drying air and dried, and when the moisture sensor detects the same grain moisture as the finishing target moisture while drying the grains, the grains flowing down the drying chamber are dried. This dryer was a drying control system that automatically stopped the drying of the grains.

Problems to be Solved by the Invention While the grains stored in the grain drying chamber of the grain dryer are fed out and flowed down in this drying chamber, the dry hot air generated from the hot air device passes through this drying chamber and is sent to the exhaust fan. The grains flowing down the drying chamber are exposed to this hot drying air and dried, and when the moisture sensor detects the same grain moisture as the finishing target moisture while drying the grains, the grains flowing down the drying chamber are dried. , this dryer is automatically controlled to stop drying the grains.

It is well known that the fat contained in the grain is hydrolyzed as a factor in grain deterioration after grain drying is completed, but the fat content can be detected and input. The purpose is to automatically change the finishing target moisture content according to this fat content to prevent grain deterioration due to hydrolysis.

Means for Solving the Problems This invention dries grains in a grain drying chamber 1 by blowing dry hot air generated from a hot air device 2 into the grain drying chamber 1 and sucking and exhausting the grains with an exhaust fan 3. A grain dryer equipped with a moisture sensor 4 that detects the moisture content of the grains during drying and a fat setting device 6 that sets the fat content of the dried grains detected by the fat sensor 5. The drying control method is characterized in that drying is performed by variably controlling the drying stop moisture content of grains based on the set value of the fat content set by operating the device 6.

Effect of the Invention The grains stored in the grain drying chamber 1 of the grain dryer are fed out and flowed down within this drying chamber 1, while the drying hot air generated from the hot air device 2 passes through this drying chamber 1. The grains flowing down in the drying chamber 3 are exposed to this drying hot air and dried by suction and exhaust air by the exhaust fan 3, and during this grain drying, the moisture sensor 4 detects that the moisture content is the same as the finished target moisture content. When grain moisture is detected, this dryer is automatically controlled to stop drying the grains.

At the start of this drying, the fat content of the grains to be dried is detected by the fat sensor 5, and the detected fat content is input and set to the dryer by operating the fat setting device 6. If this input is a high fat content, the grain finish target moisture you set will automatically change to the predetermined minimum finish target moisture, and a new finish target moisture will be set and this new low When the moisture sensor 4 detects grain moisture equal to the finishing target moisture, the dryer is automatically controlled to stop drying the grains.

Effects of the Invention According to the present invention, by detecting the fat content of the grain to be dried with the fat sensor 5 and inputting the detected fat content, for example, when a high fat content is input, With this input, the set finishing target moisture is changed and set to be lower by a predetermined amount. The hydrolysis of the grain was reduced, thereby preventing the deterioration of the grain and at the same time preventing the quality of the grain from deteriorating.

Example Hereinafter, one embodiment of the present invention will be described based on the drawings.

The zonal system shows the state in which the moisture sensor 4 is attached to a circulating type grain dryer for drying grains, and at the same time, the fat content of the grains to be dried is detected by the fat sensor 5. This shows the state in which this detected value is input to the dryer 7.

This dryer 7 has a rectangular shape that is long in the front and back direction, and is provided with a transfer gutter 9 and a ceiling plate 10 in which a transfer spiral is rotatably installed on the upper part of the machine wall 8, and grains are stored below the ceiling plate 10. A storage chamber 11 is formed.

Below this storage chamber 11, ventilation chambers 12 on both left and right sides.
Left and right grain drying chambers 1.1 are provided between the air blowing chamber 12 and the central ventilation chamber 13, and at the bottom of these drying chambers 1, 1 there is a feed-out valve 14.14 that feeds out the grains and allows them to flow down. is rotatably supported.

The lower side of the drying chamber 1.1 is configured to communicate with a grain collecting trough 15 having a rotatably internal transfer spiral.

On the front side of the machine wall 8, a hot air device 2 consisting of a burner case 18 equipped with a burner 16, a fuel pump 17, etc. is removably attached to correspond to the population side of the air blowing chamber 13, and a hot air device 2 is detachably mounted on the front side of the machine wall 8. An operating device 19 for starting and stopping the hot air device 2 and the dryer 7 for each operation of loading, drying, and discharging is removably attached to the side surface.

Further, on the back side of the horizontal wall 8, there are the left and right ventilation chambers 12, I2.
An exhaust duct chamber 20 is formed which can communicate with the
The central rear side exhaust cylinder 21 is provided with an exhaust fan 3 and an exhaust fan motor 22 for rotationally driving the exhaust fan 3.

Reference numeral 23 is a valve motor configured to rotationally drive the delivery valves 14, 14 via a speed reduction mechanism 24.

A supply port for supplying transferred grains into the storage chamber 11 is provided at the center in the longitudinal direction of the bottom plate of the transfer gutter 9, and a supply port for distributing the grains evenly into the storage chamber 11 is provided below the supply port. The configuration includes a diffuser panel 25 for

The grain raising machine 26 is provided on the front outside of the machine wall 8, has a belt with a packet conveyor 27 stretched inside, and has a dispensing cylinder 28 between its upper end and the starting end of the transfer gutter 9. A supply gutter 29 is provided between the lower end and the terminal end of the grain collection gutter 15 for communication.

Reference numeral 30 denotes a grain raising machine motor, which includes a belt with the packet conveyor 27, the transfer spiral in the transfer gutter 9, and the spreader plate 25.
etc., and the transfer spiral in the grain collecting trough 15 is driven to rotate via the belt with the packet conveyor 27.

The moisture sensor 4 for detecting grain moisture is provided approximately at the vertical center of the grain raising machine 26.

This moisture sensor 4 is operated by transmitting an electrical measurement signal from the operating device 19 to rotate the moisture motor 31 and rotationally driving each part of the moisture sensor 4. It receives the grains, crushes the grains under pressure, and simultaneously detects the water content of the crushed grains.

The operating device 19 has a five-box shape, and the surface plate of the box has the following markings.
A start switch 32 for starting the dryer 7 and the hot air device 2, etc. for each operation of loading, drying, and discharging, a stop switch 33 for stopping the dryer 7 and the hot air device 2, etc., and a moisture setting device for setting the finishing target moisture content of grains according to the operating position. 34, the burner 16
A grain type setting device 35 and a filling amount setting device 36 that set the temperature of the hot air generated from the above according to the operating position, a fat setting device 6 that sets the fat content detected by the fat sensor 5 depending on the operating position, and detected grains. The structure includes a digital display section 37 that alternately digitally displays moisture, detected drying temperature, remaining drying time, etc., a monitor, and the like. Furthermore, a changeover switch 38 is provided to make it important to input a set value based on the operating position of the fat setting device 6.

Also, inside there is an A-D converter 39 for A-D converting the detected value.
An input circuit 40 to which the converted value converted by this A-D converter 39 is input, an input circuit 41 to which various detected values are input,
A drying control device 44 is built-in, which includes a CPU 42 that performs arithmetic and logical operations and comparison operations on various input values input from these input circuits 40 and 41, and an output circuit 43 that receives and outputs various commands issued from this CPtJ 42. It is configured to do this. The setting devices 6, 34, 35, and 36 are of rotary switch type, and are configured to set predetermined values and types depending on the operating position.

The fat sensor 5 is composed of a nuclear magnetic resonance device or the like, and when the fat sensor 5 is connected to the operating device 19 and grains are fed into the fat sensor 5, the fat content of the grains is detected. The amount is detected and displayed on the digital display section 37 of the operating device 19. Also, at the same time as this display, an alarm 45 provided on the surface plate of the operating device 19
It is configured to operate.

Drying control by the drying control device 44 is performed as follows. That is, the operation details of the moisture setting device 34 are input to the CPU 42, and the finishing target moisture content of the grains is set based on this input. On the other hand, the grain moisture detected by the moisture sensor 4 is also input to the CPU 42, the input detected grain moisture is compared with the set finishing target moisture, and it is detected that the detected grain moisture has reached the finishing target moisture. When this happens, each operating part of the dryer 7 is automatically stopped to finish drying the grains.

In addition, the drying control device 44 has the following functions. That is, the fat content of the grain before drying is detected by the fat sensor 5, the detected value displayed on the display section 37 is set by operating the fat setting device 6, and the fat content is set by operating the fat setting device 6, and When the switch 38 is turned on, this detected fat content is displayed on the CPU.
42, and based on this input fat content, as shown in FIG. 2, the correction value set and stored in the CPU 42 is selected. However, the selected correction value is changed and a new finishing target moisture content is set.

For example, the moisture setting device 34 may set the target moisture content to 15.5.
% position, and the fat setting device 6 is operated to the fat content 1.8% position, the set finish target moisture content is 15.
1.5 is selected as the correction value to change 5%, this finishing target moisture content of 15.5% is changed to 14%, and this 14% is set as the new finishing target moisture content, same as above. The detected grain moisture is 14% for this finishing target moisture.
When it is detected that the dryer 7 has reached this point, the dryer 7 is controlled to stop and the drying of the five grains is stopped.

In addition, the fat sensor 5 is installed in the dryer 7, and the drying process [takes out the grains circulating in the dryer 7,
The fat content of this grain is detected and this detected value is automatically input to the CPU 42, and a correction value is selected based on this input value and set by operating the moisture setting device 34. The finished target moisture content may be changed by the selected correction value, and a new finish target moisture content may be set.

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

The fat sensor 5 is connected to the operating device 19, the fat content of the grains to be dried is detected by the fat sensor 5, and the display unit 3
The fat content displayed in 7 is set by operating the fat setting device 6, and each setting device 34, 3 of the operating device 19 is set.
5.36 to a predetermined position, and by operating the start switch 32 and changeover switch 38 to start drying,
The grain finish target moisture set by operating this moisture setting device 34 is corrected, and a new grain finish target moisture is set.At the same time, each part of the grain dryer 7, the hot air device 2, and the moisture sensor 4 etc. are started, and dry hot air is generated from this hot air device 2.

This dry hot air passes from the ventilation chamber 13 through the grain drying chamber 1.
The grains stored in the storage chamber 11 are exposed to this drying hot air and dried while flowing down from the storage chamber 11 into the drying chamber 1. 14
．． 14, the grain is fed out to the lower part, flows down, is transferred from the grain collection gutter 15, passes through the feed gutter 29, and is fed into the grain raising machine 26 by the lower transfer spiral, and is conveyed to the upper part by the packet conveyor 27, and passes through the discharging tube 28. From this transfer gutter 9, it is transferred and supplied onto a diffusion plate 25 by an upper transfer spiral, where it is evenly diffused and reduced into the storage chamber 11, and is circulated and dried. When the moisture sensor 4 detects grain moisture that is the same as the corrected and set finishing target moisture, the drying control device 44 of the operating device 19 automatically controls the dryer 7 to stop the drying of the grains. will be stopped.

[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 diagram of the relationship between the finishing target moisture content and the correction value of the fat content and the finishing target moisture content, and Fig. 3 is a diagram showing the relationship between the finishing target moisture content and the correction value of the finishing target moisture content. A side view of the grain dryer, partially cut away, Figure 4 is a sectional view taken along line A-A in Figure 3, Figure 5 is a rear view of a portion of the grain dryer, Figure 6 is the grain dryer. FIG. Description of symbols Grain drying room exhaust fan Fat sensor 2 Hot air device 4 Moisture sensor 6 Fat setting device

Claims (1)

[Claims] The grains in the grain drying chamber 1 are dried by blowing hot air generated from the hot air device 2 into the grain drying chamber 1 and sucked and exhausted by the exhaust fan 3, and the moisture of the grains during drying is detected. In a grain dryer equipped with a moisture sensor 4 for detecting moisture content and a fat setting device 6 for setting the fat content of dried grains detected by a fat sensor 5, the fat content set by operating the fat setting device 6 is A drying control method characterized in that drying is performed by variably controlling the drying stop moisture content of grains based on a set value of.