JPH07239183A - Drying control device of grain drier - Google Patents

Abstract

PURPOSE:To set a precise drying hot air temperature by a method wherein after the lapse of a predetermined time from the start of drying and when dispersion of grain moisture sensed by a moisture sensor becomes a predetermined value or less drying hot air temperature is set corresponding to grain holding capacity sensed by a holding capacity sensor, thereby conducting a drying control of grain. CONSTITUTION:As for the grain moisture during circulation drying, if the duration of application of hot air drying by means of drying hot air of a constant temperature is equal to a set predetermined time or more, or if dispersion of sensed grain moisture is equal to a set predetermined value or less, reading of grain holding capacity sensed by each of holding capacity sensors 8a, 8a,... is started, so that drying hot air temperature is selected corresponding to sensed grain holding capacity. Drying control of grains is conducted based on the drying hot air temperature, and when grain moisture sensed by a moisture sensor 2 has been sensed be equal to finishing target moisture or less, which moisture is set by operating a moisture set knob 33, it is judged that the drying of grains has been completed so that a drier 1 is automatically stopped by a control device 37 thereby to stop he drying of grain.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drying control device for a grain dryer.

[0002]

2. Description of the Related Art Conventionally, during the grain loading operation in the preceding stage of the drying operation, the amount of grain loaded into the storage chamber is detected by the front left side of this storage chamber. In the above, a plurality of each amount sensor which is turned on and off sequentially from the bottom by the pressure of the amount of grain is provided at a predetermined interval in the vertical direction, and the amount of grain is detected by turning on each of the amount sensors. It The dry hot air temperature is set in accordance with the detected amount of the laid grain, and the grain is dried at the set dry hot air temperature. (For example, Japanese Unexamined Patent Publication No. Hei 5-231771) As described above, the detection of the amount of grain to be infused is detected by turning on each amount sensor of infiltration at the end of the infiltration work. By reading after the specified circulation, it is possible to detect the exact amount of grain overhang, and after the specified circulation, and when the variation in the grain moisture decreases. It is intended to detect and obtain an accurate dry hot air temperature corresponding to the amount of grain loaded.

[0003]

According to the present invention, the hot air and the outside air generated from the burner 3 are fed while the grains are fed from the upper grain storage chamber 7 to the lower grain drying chamber 8 and are circulated while flowing down. Is provided to ventilate the dry hot air mixed into the drying chamber 8 to dry the hot air, and the storage chamber 7 is provided with swelling amount sensors 8a, 8a, ... A moisture sensor 2 which is provided at a predetermined interval in the vertical direction to detect the amount of overwhelmed grains and also detects the moisture content of the grains during circulating drying.
In the grain dryer provided with, at the start of drying, the drying hot air temperature is set to a constant temperature to dry the grain, and after a predetermined time has elapsed from the start of drying, and the moisture content of the grain detected by the moisture sensor 2. When the variation of is less than or equal to a predetermined value, a controller 37 for drying the grain by setting the dry hot air temperature corresponding to the amount of grain to be detected detected by the amount sensor 8a, 8a, ... A drying control device for a grain dryer characterized by being provided.

[0004]

The operation and effect of the invention: Until the predetermined time elapses from the start of the drying operation, the temperature of the dry hot air from the burner 3 is controlled to the set constant temperature to dry the grain, and the above predetermined time elapses. Further, when the variation in the moisture content of the grain detected by the moisture sensor 2 becomes less than or equal to a predetermined value, the stuck amount sensor 8
a, 8a, ... Detects the amount of grain infused, and the dry hot air temperature from the burner 3 corresponding to the detected amount of grain infused is selected and set. The grains are dried.

As described above, after a predetermined time has elapsed from the start of drying, when the variation in the moisture content of the grain is further reduced to a predetermined value or less, the amount of grain overhanging is detected, so that the grains diffused and supplied into the storage chamber 7 are By detecting when the twigs are removed from the grain evenly, the
It is possible to accurately detect the amount of spilled grains, and to set the temperature of dry hot air accurately.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The illustrated example is a circulation type grain dryer 1 for drying grains.
It shows a state in which a moisture sensor 2 for detecting moisture in the grain, a burner 3 for generating hot air, etc. are mounted. The dryer 1 has a rectangular shape that is long in the front-rear direction, and the upper part of the machine wall 4 is
A transfer trough 5 and a ceiling plate 6 in which a transfer spiral is rotatably installed are provided, and a grain storage chamber 7 for storing grains is formed below the ceiling plate 6.

A plurality of viewing windows 4a for visually observing the amount of grains to be loaded into the storage chamber 7 are provided at a predetermined interval in the vertical direction on the right side of the central portion of the front machine wall 4 forming the storage chamber 7. ing. The stuck grain amount detecting device 5a is provided in a suspended state from the ceiling plate 6 to a position near the left machine wall 4 on the front machine wall 4 side in the storage chamber 7.

As shown in FIG. 4, the inlaid grain amount detecting device 5a is, for example, a strip-shaped resin film plate 6a, 6b on both right and left sides.
.., each of which is composed of conductive plates 7a, 7b, is attached to each inner surface of the above at predetermined intervals in the vertical direction, and an auxiliary plate 9b having a cavity hole 9a is provided in the middle. The resin film plates 6c are mounted on the resin film plate 6c at predetermined intervals in the vertical direction, and the resin film plates 6a, 6b, 6c are integrally molded. (FIG. 4 shows a divided state.) The resin film plates 6a, 6 are pushed by the pressure of the swelling grain and pass through the cavity hole 9a of the auxiliary plate 9b of the resin film plate 6c.
The conducting plates 7a and 7b of the squeezing amount sensor 8a of b are brought into contact with each other, and this contact causes an ON operation in a galvanic state, and this ON operation in an energized state is input to the driving operation device 14, and this ON operation is performed. By the operation input, these conductive plates 7a,
It is configured to detect that the grain has been squeezed to the contact position of 7b and detect the amount of spilled grain.

Assuming that the conductive plates 7a and 7b are, for example, a dryer 1 having a grain drying capacity of 32 stones, the conductive plates 7a and 7b and the auxiliary plate 9b are sequentially stretched from the bottom to a minimum amount 6 Stone, 8 stones, 12 stones, 16 stones, 20 stones, 24 stones, 2
Provided at a position corresponding to 8 stones and a maximum amount of grain 32 stones,
When the position of 32 stones is in a galvanic state, it is configured to detect that the stake grain is full.

The grain drying chambers 8 and 8 are provided below the storage chamber 7 between the exhaust chambers 9 and 9 on both the left and right sides and the blower chamber 10 at the center, and below the drying chambers 8 and 8. Each of the feeding valves 11 for feeding and dropping the grain is rotatably supported. The grain collecting trough 12 rotatably supports a transfer spiral and is provided below the drying chambers 8 and 8 to communicate with each other.

The burner 3 is installed inside a burner case 13, and the burner case 13 is detachably attached to the outer surface of the front machine wall 4 on the front side of the front machine wall 4 so as to correspond to the inlet side of the blower chamber 10. Installed in the dryer, the dryer 1, the moisture sensor 2
Also, the operation device 14 for starting and stopping the burner 3 and the like for each work of loading, drying, and discharging is the front machine wall 4
Detachable on the outer surface.

The exhaust fan 15 is provided on a rear side exhaust wall 9, which is provided at the central rear side exhaust duct 17 of the exhaust passage chamber 16 provided so as to communicate with the left and right exhaust chambers 9, 9. 4 is this blower 1
A blower motor 18 for rotating and driving 5 is provided. The valve motor 19 rotationally drives the delivery valves 11, 11 via a speed reduction mechanism.

The fuel pump 20 has a fuel valve,
The fuel pump 20 is provided outside the lower plate of the burner case 13, and the fuel in the fuel tank 21 is sucked by the fuel pump 20 and supplied to the burner 3. Blower 22
Is provided on the outer side of the upper plate and is rotationally driven at a variable speed by a fan motor 23 for speed change so that combustion air commensurate with the amount of fuel supplied is blown by the fan 22 to the burner 3. The burner 3
The hot air generated from the burner case and the outside air passing through the burner case 13 are mixed into dry hot air.

The diffusion plate 24 is provided at the center of the bottom plate of the transfer gutter 5 in the front-rear direction and below the supply port for supplying the transfer grains to the storage chamber 7 to uniformly diffuse and reduce the grains to the storage chamber 7. ing.
The grain-raising machine 25 is provided on the outer side of the front side machine wall 4, is provided with a belt with a bucket conveyor 26 stretched inside, and an upper end portion is provided with a throw-out cylinder 27 between the transfer gutter 5 and the starting end portion. The lower end portion is provided with a supply gutter 28 between the lower end portion and the terminal end portion of the grain collecting trough 12 for communication. At the lower part of the grain raising machine 25, a hopper (not shown) for feeding and supplying grains is provided.

The grain elevator motor 29 is used for the bucket conveyor 2
The belt with 6 and the transfer spiral in the transfer gutter 5 and the transfer spiral in the diffusing plate 24 and the grain collecting gutter 12 are rotationally driven. The moisture sensor 2 is provided substantially in the central portion in the up-down direction of the grain raising machine 25. The moisture sensor 2 rotates the moisture motor 30 in response to the transmission of an electrical measurement signal from the operation device 14.
The take-in roll 29'a and the detection rolls 30 ', 30' of each part of the moisture sensor 2 are rotationally driven to guide the grains falling during the upper conveyance by the bucket conveyor 26 to the take-up roll 29'a. The crushed grains are received by the plate 29'b and transferred one by one and fed to the detection rolls 30 ', 30' on the lower side. , For example, 32 grains of water are detected, and an average value is calculated to be one detection grain moisture.

The operation and operation device 14 has a box shape, and a dryer 1, a moisture sensor 2 and a burner 3 are provided on a surface plate of the box body.
Each of the ON-OFF switch starting means 31, a stopping means 32 for stopping the operation, and a moisture setting grinder 33 for setting the finishing target moisture of the grain by a push button method for starting each operation of loading, drying and discharging. , A grain type setting knob 34 for setting the temperature of the hot air generated from the burner 3 according to the operation position,
A display unit 36 for digitally displaying various display items and a monitor display are provided.

The control device 37 and the timer 35 are provided in the operation device 14, and the moisture sensor 2 and the amount sensor 8 are attached.
a, 8a, ..., Detection values detected by the hot air temperature sensor 38, the starting means 31, the stopping means 32, and the setting knobs 3
Operations such as 3 and 34 are input, and the CPU 39 and the like perform arithmetic and logical operations and comparison operations on these inputs.
In U39, the motors 18, 19, 23, 29, 30, the timer 35, the fuel valve, the fuel pump 20, and the like are started, stopped, and adjusted and controlled. Each setting knob 33,
34 is a rotary switch system, and predetermined numerical values, types, etc. are set according to the operation position.

The operation of the above embodiment will be described below. By operating the setting scoops 33 and 34 of the operation device 14 to predetermined positions and turning on the starting means 31 for starting the drying operation, the grain dryer 1 is started and the drying operation is started (step 101), a set constant temperature, for example, a dry hot air temperature of 40 ° C. is generated from the burner 3 to start constant temperature drying (step 102), and the dry hot air is blown from the blower chamber 10 to the grain drying chambers 8 and 8 respectively. After passing through the exhaust air chambers 9 and 9 and the exhaust air passage chamber 16, the exhaust air is exhausted to the outside by the exhaust fan 15.

The grains stored in the grain storage chamber 7 are dried by being exposed to dry hot air at a constant temperature while flowing down from the storage chamber 7 into the drying chambers 8, 8. , 11
Is fed and flowed down from the grain collecting gutter 12 through the supply gutter 28 to the inside of the grain raising machine 25 by the lower transfer spiral, and is conveyed to the upper portion by the bucket conveyor 26, and the transfer gutter 5 is transferred from the throw-out cylinder 27. After that, it is transferred and supplied by the upper transfer spiral onto the diffusion plate 24, and is uniformly diffused and reduced into the storage chamber 7 by the diffusion plate 24 and circulated and dried.

The moisture content of the grain during the circulation drying is measured by the moisture sensor 2 (step 103), and it is detected whether the hot air drying elapsed time by the dry hot air at a constant temperature is equal to or longer than the set time (step 104). ), If YES, it is detected whether the variation of the grain moisture detected by the moisture sensor 2 is less than or equal to a set predetermined value (step 105), and Y
If it is ES, the reading of the amount of the stuck grain detected by each of the stuck amount sensors 8a, 8a, ... Is started (step 10).
6), the dry hot air temperature corresponding to the detected amount of grain is selected (step 107), the dry hot air temperature is determined and set (step 108), and the dry hot air temperature of this setting controls the drying of the grain. (Step 109), the moisture sensor 2
It is detected whether or not the grain moisture detected in step 3 is less than or equal to the finishing target moisture set by the operation of the moisture setting knob 33 (step 11).
0), if NO is detected, the drying of the grain is continued (step 111) and the process returns to step 110. If YES, it is determined that the drying of the grain has ended, and the dryer 1 controls the controller 37.
Then, the grain is automatically stopped and the drying of the grain is stopped (step 112).

If the answer in step 104 is NO, the drying of the grain is continued (step 113), and the grain moisture detected by the moisture sensor 2 is equal to or lower than the finish target moisture set by the operation of the moisture setting scoop 33. Detected (step 114), N
If it is O, the process returns to step 104. If YES, it is determined that the drying of the grain has been completed, the dryer 1 is automatically stopped by the control device 37, and the drying of the grain is stopped (step 11).
5).

If NO in step 105, the drying of the grain is continued (step 116), and whether the grain moisture detected by the moisture sensor 2 is equal to or lower than the finishing target moisture set by the operation of the moisture setting knob 33. Detected (step 117), N
If it is O, the process returns to step 105. If YES, it is determined that the drying of the grain has been completed, the dryer 1 is automatically stopped by the control device 37, and the drying of the grain is stopped (step 11).
8).

FIG. 8 is a flowchart of another operation,
The grain may be dried and controlled as shown in the flowchart of FIG. The dryer 1 is started to start the drying operation (step 201), a set hot temperature, for example, a hot dry air temperature of 40 ° C. is generated from the burner 3 and constant temperature drying is started (step 202). The air is sucked and discharged from the blower chamber 10 through the drying chambers 8, 8 through the exhaust chambers 9, 9 and the exhaust passage chamber 16 to the outside by the exhaust fan 15.

The grains contained in the storage chamber 7 are dried by being exposed to dry hot air having a constant temperature while flowing down from the storage chamber 7 into the drying chambers 8 and 8. And then flow down to the grain collecting trough 12 and then through the supply trough 28 to the grain raising machine 2
5 is transferred and supplied by the lower transfer spiral to the inside of the container 5, is conveyed to the upper part by the bucket conveyor 26, and is transferred and supplied by the upper transfer spiral from the ejection cylinder 27 to the diffusion plate 24 through the transfer gutter 5 by the diffusion plate 24. It is uniformly diffused and reduced into the storage chamber 7 and circulated and dried.

The moisture content of the grain during the circulation drying is measured by the moisture sensor 2 (step 203), and the measurement time of the grain moisture of a predetermined number, for example 32 grains, is α (4 minutes or less) or less. Is detected (step 204), and if YES, the reading of the amount of grain infiltration detected by each amount sensor 8 a, 8 a, ... Is started (step 205), and it corresponds to the amount of grain infiltration detected. The drying hot air temperature to be selected is selected (step 206), the drying hot air temperature is determined and set (step 207), the grain is dried and controlled by the set dry hot air temperature (step 208), and the moisture sensor 2 is used. It is detected whether or not the detected grain moisture is equal to or lower than the finishing target moisture set by the operation of the moisture setting knob 33 (step 209), and N
If it is O, the drying of the grain is continued (step 210),
Return to step 209. If YES, it is determined that the drying is completed, and the dryer 1 is automatically stopped by the control device 37 to stop the drying of the grain (step 211).

If NO in step 204, drying of the grain is continued (step 212), and is the grain moisture detected by the moisture sensor 2 equal to or lower than the finishing target moisture set by the operation of the moisture setting knob 33? Detected (step 213), N
If it is O, the process returns to step 204. If YES, it is determined that the drying of the grain has been completed, and the dryer 1 is automatically stopped by the control device 37 to stop the drying of the grain (step 21).
4).

According to the above, after the lapse of a predetermined time from the start of drying of the grain, the amount of the swelling can be detected when the diffusion state becomes even, so that the accurate amount of the squeeze can be detected and the reading can be performed for the predetermined time. Easy to read because it is later.

[Brief description of drawings]

 The figure shows an embodiment of the present invention.

FIG. 1 Flow chart

[Fig. 2] Side view of the grain dryer that can be partially broken

3 is an enlarged sectional view taken along line AA of FIG.

FIG. 4 is a partial divisional view of an enlarged front cross section of the stuck grain amount detecting device.

FIG. 5 is an enlarged front view in which a part of the operating device is broken.

FIG. 6 is an enlarged side perspective view of a part of the moisture sensor.

FIG. 7 is a block diagram.

FIG. 8 is a flow chart showing another operation.

[Explanation of symbols]

 2 Moisture sensor 3 Burner 7 Grain storage chamber 8 Grain drying chamber 8a Overhang sensor 37 Control device

Claims (1)

[Claims] 1. Dry hot air in which hot air generated from the burner 3 and outside air are mixed while feeding and circulating the grains from the upper grain storage chamber 7 to the lower grain drying chamber 8 A plurality of swelling amount sensors 8a, 8a, ... Which are provided to ventilate the chamber 8 to dry with hot air and which are sequentially turned on and off by the spilled grains from the bottom in the storage chamber 7 are vertically arranged at predetermined intervals. In the grain dryer provided with the moisture sensor 2 for detecting the amount of grain overwhelmed and for detecting grain moisture during circulation drying, the drying hot air temperature is set to a constant temperature at the start of drying. The grain amount is dried, and after a lapse of a predetermined time from the start of drying, and when the variation in the moisture content of the grain detected by the moisture sensor 2 becomes a predetermined value or less, the amount sensors 8a, 8a, ...
A drying control device for a grain dryer, comprising a control device 37 for drying the grain by setting the drying hot air temperature corresponding to the amount of the stuck grain detected by.