JPH0746026B2 - Grain drying control system of grain dryer - Google Patents

Description

TECHNICAL FIELD The present invention relates to a grain drying control system for a grain dryer.

[Prior art]

The end of conventional grain drying is determined by whether or not the preset target moisture value has been reached.Therefore, the moisture detection sensor detects the moisture value of the dried grain every predetermined time, and this is the above setting. When the value was reached, the drying was automatically stopped.

[Problems to be Solved by the Invention]

However, moisture transfer occurs after drying in a mixed state of immature grains, the moisture value may deviate to the desired moisture range at the time of hulling work as a post-work, and may damage the grain after hulling. is there.

[Means for Solving the Problem] The present invention has taken the following technical means in an attempt to solve the above drawbacks. That is, the drying chamber 2 is provided below the storage chamber 1 for storing the grains, and the grains flowing down the drying chamber 2 are dried by the hot air generated by the burner 3, and the dryer is circulated and dried. In a grain dryer that is provided with a moisture detection sensor 5 that detects the moisture value of the inside grain, and stops drying when the target moisture content Me of the drying finish preset based on this moisture detection result is reached, A hulling timing setting device for setting a time T until the hulling work, which is a post-treatment work of dried grains, is provided with a calculating means or an outside air humidity calculating means for calculating a mixing ratio of immature grains mixed in the 6 is provided, and based on the size of the immature grain mixing ratio ε or the outside air humidity and the size of the set value by the hulling timing setting device 6, the dry finishing target value Me
A grain drying control system of a grain dryer is characterized in that a correcting device 42 is provided to correct the height.

[Operation and effect of the invention]

A target moisture content Me for dry finishing is set at the start of the drying operation, and then a device 6 for appropriately setting the hulling time of dried grains is used.
Set by.

Although the drying action progresses and the dried grains are dried, it is judged whether or not a predetermined finishing target moisture value Me has been reached, and when this moisture value Me is reached, the drying is stopped.

In the meantime, for example, while the immature grain ratio ε is calculated based on the detection result of the moisture detection sensor 5, the correction device 42 inputs the calculated ratio ε and the set value of the hulling timing. The correction device corrects the target finish moisture value Me from the relationship between the size of the immature grains and the size of the hulling time setting time, and as a result, it will be stopped after predicting dry frost or dry reversion. During the hulling operation, the water content becomes appropriate, and thus the hulled state can be obtained.

Similarly, depending on the magnitude of the outside air humidity that affects the dry corner and the drying back, the same effect can be obtained by correcting the target finish moisture value Me in relation to the input of the hulling time.

〔Example〕

 An embodiment of the present invention will be described with reference to the drawings.

The machine wall 8 of the dryer 7 has a rectangular shape in plan view which is long in the front-rear direction.
The front wall plate is composed of front and rear wall plates and left and right wall plates. The front wall plate has an operating device 9 for controlling start and stop of the dryer 7 and a moisture value of grains flowing down in the machine wall 8. Moisture detection sensor 5 for detecting the mixing ratio of immature grains based on the detected moisture value
It is a configuration with.

A V-shaped grain collecting gutter 10 with a transfer spiral built in is provided between the center of the lower part of the machine wall 8 and the front-rear direction.
Is provided, and the feeding valve 11, 11 is provided at the bottom on the upper side of the grain collecting gutter 10.
The drying chambers 2, 2 supporting the above are provided to communicate with each other, and the hot air chamber 12 is formed inside the drying chambers 2, 2 and the burner built in the burner case 13 provided on the front wall plate is provided. 3 is in communication with the drying chambers 2, 2 between the outside of the drying chambers 2, 2 and the left and right wall plates.
4, 14 are formed, and the exhaust fan 4 provided on the rear wall plate is connected to the seta structure. The hot air chamber 12 and the exhaust air chambers 14, 14 are provided with inclined plates on the upper side and partition plates on the lower side, and a hot air temperature detection sensor 15 for detecting the hot air temperature in the hot air chamber 12 is provided in the hot air chamber 12.
And a motor 16 is provided below the rear wall plate.
16 is a configuration for rotationally driving the transfer spiral in the grain collecting trough 10, the feeding valves 11, 11, the exhaust fan 4, and the like.

A fuel tank 17 is installed in the front part of the dryer 7, a fuel pump 18 is provided in the burner case 13, and fuel is sucked by the fuel pump 18 from the fuel tank 17 through a fuel hose. This fuel is passed through the fuel supply pipe to the burner 3
The blower 19 provided in the burner case 13 is rotationally driven by a blower motor 20 to blow the combustion air into the burner 3 through a blower duct.

A storage chamber 1 is formed on the upper side of the drying chambers 2 and 2, and a transfer gutter 22 provided with ceiling plates 21 and 21 and a transfer spiral is provided on the upper side of the storage chamber 1, and a central portion of the transfer gutter 22. Is provided with a supply port for supplying transfer grains into the storage chamber 1, and a diffusion plate 23 is provided below the supply port. The diffusion plate 23 uniformly diffuses the grains into the storage chamber 1. It is a configuration that returns.

The front wall plate front part is equipped with a grain raising machine 24, a bucket conveyor 25 belt is stretched inside between upper and lower pulleys, and a throwing tube 26 is provided between an upper end part and the transfer gutter 22 starting end part. It is configured to communicate with each other, and a supply gutter 27 is provided between the lower end portion and the terminal end portion of the grain collecting gutter 10 so as to communicate with each other, and a motor 28 is provided on one side of the upper part of the grain raising machine 24. 28 in the bucket conveyor
25 belt, the transfer spiral in the transfer gutter 22, the diffuser 23, etc. are rotationally driven.

The water content detection sensor 5 has a box shape, and the detection unit for detecting the water content of the grain is configured to project from the inside of the box, and the projection is provided on the front wall plate in a state of protruding into the front wall plate. At the same time as mounting and crushing a part of the grain flowing down in the machine wall 8 by the detection unit, the moisture value of this crushed grain is detected, and the detected moisture value is calculated to obtain the average value. Calculate and use this average value as the detected moisture value, and calculate the ratio to the whole from the number of detected moisture values that exceed the upper limit of the width of the predetermined value with respect to the previous average value, and calculate the mixing ratio of immature grains The moisture detection sensor 5 rotates the control motor 29 provided in the box according to an electric measurement signal transmitted from the operation device 9 at a predetermined interval, and the control motor 29 detects the moisture. The detection part of the sensor 5 operates to detect the moisture value of the grain and at the same time In this configuration, the mixing ratio of immature grains is detected.

The operating device 9 has a box shape, and a start switch for starting and stopping the dryer 7 is provided on a surface plate of the box body.
30, stop switch 31, target moisture setting scoop 32 for setting finishing target moisture value of grain, hot air temperature setting scoop 33 for setting hot air temperature generated from the burner 3, hulling work after completion of grain drying Up to a hulling time setting device 6 for setting the time for storing the dried grains, a display window, and the like are provided. An outside air temperature detection sensor 34 for detecting the outside air temperature is provided outside the lower plate, and a control device 35 is provided inside. This controller
Reference numeral 35 has an input circuit 36 to which operation signals of the respective switches 30 and 31 are input, and an input circuit 37 to which a magnitude setting operation signal of the time T of the hulling timing setting device 6 is input. In addition, this hulling timing setting device 6 is, for example, (a) after completion of drying of the grain,
(B) It has a rotary switch configuration that can be operated to a position such as several hours after the completion of drying and (c) one day or more after the completion of drying, and the operation signal is input to the input circuit 37. Further, the detected values detected by the outside air temperature detecting sensor 34, the moisture detecting sensor 5 and the hot air degree detecting sensor 15 are A /
A / D converter 38 for D conversion, input circuit 39 to which the converted value converted by this A / D converter 38 is input, these input circuits 36, 37,
A CPU 40 that performs arithmetic logic operation, comparison operation, and the like on various input values input from 39, and a correction device 42 is provided in this CPU 40. On the other hand, it has a configuration including an output circuit 41 that receives and outputs various commands instructed by the CPU 40.

The control device 35 controls the starting, stopping, etc. of the motors 16, 20, 28, 29, and controls the operation and stop of the fuel pump 18 and the amount of fuel sucked by the fuel pump 18. . The setting knobs 32 and 33 have a rotary switch configuration, and when the setting knobs 32 and 33 are set and operated, an operation signal based on the operation position is input.

The control device 35 is configured to automatically stop the dryer 7 when the moisture detection sensor 5 detects the same grain moisture value as the set finishing target moisture value set by the target moisture setting knob 32. . At the time of automatic stop, the finish target moisture value is corrected in the manner shown in FIG. For example, when the hulling timing setting device 6 is operated to the position (a) immediately after the completion of grain drying, regardless of the size of the immature grain mixing ratio ε stored in the control device 35, the set finish target moisture value is set. The grain is dried until the moisture value of the same grain as Me is detected, but the hulling timing setting device 6 is operated to the (b) position for several hours after the completion of the grain drying, and the immature grain mixing ratio ε is high. When (ε> ε ₁ ), the correction device 42 corrects the predetermined value α (> 0) stored in the control device 35 to a value lower than the set finish target moisture value Me (Me
-Α), the grains are dried until this value is reached, and conversely, the immature grain mixing ratio ε is low (ε <ε
₂ ) Sometimes, the predetermined value β stored in the control device 35 is
Correct (Me + β) to a value higher than the set finish target moisture value Me and dry the grain. When the hulling timing setting device 6 is operated to the position of one day after the completion of drying of the grain, and the immature grain mixing ratio ε is high (ε> ε ₁ ), the predetermined value γ stored in the control device 35 is When the grain is dried by correcting (Me-γ) to a value lower than the set finish target moisture value Me, and when the immature grain mixing ratio ε is low (ε <ε ₂ ) contrary to the above, the set finish target moisture content is set. It is configured to correct the grain to the same value as the value Me and dry the grain.

The predetermined values α, β, γ are configured to be changeable according to the detected outside air temperature detected by the outside air temperature detection sensor 34. For example, when the detected outside air temperature is high, these predetermined values are set to be largely changed, and conversely, when the detected outside air temperature is low, the predetermined value is set and stored to be changed to a small value. .

The controller 35 detects the hot air temperature in the hot air chamber 12 by the hot air temperature detection sensor 15 so that the set hot air temperature is set by operating the hot air temperature setting knob 33, and the detected hot air temperature And the set hot air temperature are compared by the control device 35 so that they are the same, the fuel pump 18 is controlled, and the amount of fuel supplied into the burner 3 is changed and controlled. The detected hot air temperature and the detected grain moisture value detected by the moisture detection sensor 5 are alternately displayed on the display window on the surface of the operating device 9.

An outside air humidity detection sensor for detecting outside air humidity is provided on the outside of the lower plate of the operating device 9, and the target moisture setting selector 32
When the moisture detection sensor 5 detects the moisture value of the grain in the vicinity of the set finish target moisture value set by operating, when the detected outside air humidity detected by the outside air humidity detection sensor is higher than the set finish target moisture value. There is provided a correction device that dries the grain until it reaches a value lower by a predetermined value, and conversely, when the detected outside air humidity is low, dries the grain to the same value as the set finish target moisture value.

After operating the setting knobs 32 and 33 of the operating device 9, the dryer 7 is started by turning on the start switch 30.
Hot air is generated by the burner 3 provided on the front wall plate, and this hot air is accompanied by the suction action of the exhaust fan 4 provided on the rear wall plate, so that the drying chamber 2 is ventilated from the hot air chamber 12 and the exhaust air chamber 14 is passed through. It is sucked and exhausted. The grains contained in the storage chamber 1 of the dryer 7 are dried by the hot air while flowing down from the storage chamber 1 into the drying chamber 2. It is continuously fed to the lower part by the feeding valve 11, is transferred and discharged into the supply gutter 27 through the grain collecting trough 10 by the lower transfer spiral, and is conveyed to the upper part by the grain raising machine 24 and is supplied to the transfer gutter 22. The transfer spiral in the transfer gutter 22 is transferred and supplied onto the diffusion plate 23 through the transfer gutter 22, and is uniformly diffused and reduced into the storage chamber 1 by the diffusion plate 23, circulated and dried to set the target water content. When the same moisture value as the set finish target moisture value set by the scoop 32 is detected, the controller 35 automatically stops the dryer 7.

At the start of this drying operation, the hulling timing setting device 6 is set to start the drying operation. This setting operation is carried out at the same time when the moisture detection sensor 5 detects the moisture value of the grain by the ratio of the immature grains to be detected, the outside air temperature detected by the outside air temperature detection sensor 34, etc.
From the set finishing target moisture value set by operating 32, the grain is in a dried state, the state where it is not dried more than the set finishing target moisture value, or the same grain moisture state as the set finishing target moisture value, etc. The moisture value of the grain is corrected and controlled to dry the grain.

The dry state of the grain is controlled by the set time T by the operation of the hulling timing setting device 6, the detected immature grain mixing ratio ε detected by the moisture detection sensor 5, the outside air temperature detected by the outside air temperature detection sensor 34, and the like. As a result, the moisture content of the grain after the completion of drying the grain is added to the state, so that the moisture value of the brown rice that has been hulled from the dried grain can be made equal to the finishing target moisture value. it can.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention. FIG. 1 is a block diagram, FIG. 2 is a moisture value correction table, and FIG. 3 is a partially sectional front view and FIG. FIG. 5 is a side view with a partial cross section, and FIG. 5 is an enlarged front view of a part of the dryer. In the figure, reference numeral 1 is a storage chamber, 2 is a drying chamber, 3 is a burner, 4 is an exhaust fan, 5 is a moisture detection sensor, and 6 is a hulling timing setting device.

Claims (1)

[Claims] 1. A drying chamber 2 is provided below a storage chamber 1 for storing grains, and the drying chamber 2 is heated by hot air generated by a burner 3.
It is configured to dry the grain flowing down, and the dryer is provided with a moisture detection sensor that detects the moisture value of the grain during circulating drying, and the dry finishing target moisture value Me set in advance based on this moisture detection result. In the grain dryer that stops drying when reaching, the calculation means or the outside air humidity calculation means for calculating the mixing ratio of the immature grain mixed in the dried grain is provided, while it is the post-treatment work of the dried grain. Time T until hulling work
In order to correct the dry finishing target value Me to high or low based on the size of the immature grain mixing ratio ε or the outside air humidity and the size of the set value by the rice hulling time setting device 6 by providing the hulling time setting device 6 for setting A grain drying control system for a grain dryer, which is provided with a correction device 42.