JPH05340669A - Grain charge-detecting device for grain dryer - Google Patents

Abstract

PURPOSE:To reduce the cost by reducing the number of signal lines of feed- charge sensors. CONSTITUTION:The subject relates to a system in which transmission lines for signals from the respective feed-charge sensors 3 are reduced to two separate lines 14, 15, each of which is connected to a separate D-A conversion circuit 18 and then to an operating device. This drastic reduction in number of the lines for transmitting signals from the respective feed-charge sensors 3 enables a considerable cut in the cost.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Conventionally, hot air is passed through the drying chamber while being fed out from the grain storage chamber and flowing down to the grain drying chamber, where it is exposed to the hot air and dried. The detection of the amount of the infused grain that has been infused into the storage chamber is performed by a pressure switch that is turned on and off by a plurality of grain pressures in the vertical direction at predetermined intervals on the inner surface of the machine wall forming the retention chamber. Is equipped with a swelling amount sensor consisting of
Is individually input to the operating device, the position of each ON state of each of the pressure switches is detected by this input, and it is detected that the grains are stuck to the ON state detection position. It was a stake-in grain detecting device for detecting.

[0003]

The grains stored in the grain storage chamber of the grain dryer are fed from the storage chamber through the grain drying chamber while hot air passes through the drying chamber. When exposed to the hot air and dried and the grain reaches the finishing target moisture, the dryer is stopped and the drying of the grain is stopped.

The detection of the amount of grain infused into the storage chamber is carried out by each of a plurality of swelling amount sensors provided vertically at predetermined intervals on the inner surface of the machine wall forming the storage chamber. When the pressure switch is pressed by the pressure of the swelling grain, it is turned on sequentially from the bottom, and these ON states are input to the operating device, and the position of each pressure switch in the ON state is detected by this input. It is detected that the grains are stuck to the ON-state detection position, and the amount of stuck grains is detected.

By inputting ON-OFF of each pressure switch of each swelling amount sensor individually, a large number of signal lines are input, and this is reduced to improve reliability and reduce cost. It is something to try.

[0006]

According to the present invention, while the grains are fed from the upper grain storage chamber 8 to the lower grain drying chamber 9 and are allowed to flow down and are exposed to hot air to be dried, the inside of the storage chamber 8 is also reduced. The pressure switches 16 of the squeeze amount sensor 3 are provided in plural rows with different vertical positions for each row and provided at predetermined intervals in the vertical direction.
ON-OFF by grain pressure is sequentially operated by row
It is set to 0, and detects the amount of stuck grains, and is the structure of the stuck grain detection device of the grain dryer characterized by the above-mentioned.

[0007]

The grain stored in the grain storage chamber 8 of the grain dryer is exposed to hot air and dried while being fed out of the grain drying chamber 9 from the storage chamber 8 and dried. When the finishing target moisture is reached, the dryer is stopped and the drying of the grain is stopped. The detection of the amount of grain to be stretched into the storage chamber 8 is carried out in a plurality of rows on the inner surface of the machine wall forming the storage chamber 8 with different vertical positions for each row at predetermined intervals in the vertical direction. By pressing each pressure switch 16 of each of the plurality of swelling amount sensors 3 pressed by the pressure of the swelling grain, the ON state is sequentially applied from the bottom, and these ON states are transferred to the operating device 20 for each row. Is input, and by this input, O of each of the pressure switches 16 is input.
The position in the N state is detected, it is detected that the grains are stuck to the ON state detection position, and the amount of stuck grains is detected.

[0008]

According to the present invention, the stake amount sensors 3 are provided in a plurality of columns, and ON / OFF of each pressure switch 16 of the swell amount sensor 3 is input to the operating device 20 for each column. As a result, the number of input signal lines can be reduced, the reliability of the stuck amount sensor 3 is improved, and the cost can be greatly reduced.

[0009]

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 the moisture of the grain, each amount sensor 3 for detecting the amount of the grain infused, a burner 4 for generating hot air, etc. are attached.

The dryer 1 has a rectangular shape that is long in the front-rear direction and has a transfer gutter 6 and a ceiling plate 7 in which a transfer spiral is rotatably installed on the upper part of the machine wall 5. Below the ceiling plate 7, grains are provided. A grain storage chamber 8 for storing grains is formed. Grain drying room 9,
Reference numeral 9 indicates a lower side of the storage chamber 8 on both left and right sides of the exhaust chamber 1.
0, 10 and a blower chamber 11 at the center, and below these drying chambers 9, 9, a delivery valve 12 for delivering and flowing down the grains is rotatably supported.

The grain collecting trough 13 rotatably supports a transfer spiral and is provided below the respective drying chambers 9 and 9 to communicate with each other. Each of the stuck amount sensors 3 has, for example, a grain drying capacity of 32.
Assuming that the stone dryer 1 is used, 8 stones (NO. 2) and 12 stones (N.
O. 3), 16 stones (NO.4), 20 stones (NO.5),
24 stones (NO.6), 28 stones (NO.7), and 32 stones (NO.8) with the maximum loading amount are provided to correspond to these 6
The stones, 12 stones, 20 stones, and 28 stones (a) row position sensors 3 are connected by a transmission line 14, and these 8 stones, 1 stone
The respective extension amount sensors 3 at the positions of 6 stones, 24 stones and 32 stones (b) are connected by the transmission line 15.

Each of the swelling amount sensors 3 has a structure in which a pressure switch 16 which is pressed by the pressure of the swelling grain and turned on and off is installed. On the upper plate of the transfer gutter 6, the relay case 1
7 is provided, and the transmission line 1 is provided in the relay case 17.
ON of each pressure switch 16 transmitted via 4 and 15
DA conversion circuits 18 and 19 for converting a -OFF digital signal into an analog voltage corresponding to an ON-OFF state are provided, and operated from the respective DA conversion circuits 18 and 19 via the transmission lines 14 and 15. This is a configuration input to the device 20.

As shown in FIG. 6, the respective D-A conversion circuits 18 have resistors R1 (21a) to R1 (21a) having different resistance values on the (a) column side.
R6 (21f) is provided, and the DA conversion circuit 19 has resistors R7 (2) having different resistance values on the (b) row side as shown in FIG.
2a) to R12 (22f) are provided, and each of the pressure switches 16 is turned on depending on the difference in the input resistance value.
The configuration is such that the OFF state is detected, and the position of each pressure switch 16 in the ON state is detected to detect the amount of overhanging grain. The detected amount of stuck grains is one of the conditions for setting the temperature of the hot air generated from the burner 4.

The resistors R1 (2a) to R6 (21f) and the resistors R7 (22a) to R12 (22f) have resistance values YΩ to Y5Ω as shown in FIG. The burner 4 is provided inside the burner case 23, and the burner case 23 is detachably provided on the outer surface of the machine wall 5 so as to correspond to the inlet side of the blower chamber 11 on the front side of the machine wall 5. Further, the operating device 20 for starting and stopping the burner 4, the moisture sensor 2 and the dryer 1 for each work of loading, drying and discharging is detachably provided on the machine wall 5 on the front side.

The exhaust fan 24 is provided on a central rear-side exhaust cylinder 26 on the rear side machine wall 5 provided to communicate with the left and right exhaust chambers 10, 10, and also on the rear side. On the side machine wall 5, an exhaust fan motor 2 that rotationally drives the exhaust fan 24.
7 is provided. A valve motor 28 rotationally drives the delivery valves 12 and 12 through a speed reduction mechanism.

The fuel pump 29 has a fuel valve,
The burner case 23 is provided outside the lower plate, and by opening and closing the fuel valve, the fuel in the fuel tank 30 is sucked by the fuel pump 29 and supplied to the burner 4. The blower 31 is provided on the outer side of the upper plate, and is provided with the blower motor 3 for shifting.
The variable speed rotation driving is performed by 2, and the combustion air corresponding to the supplied fuel amount is blown to the burner 4 by the blower 31.

The diffusing plate 33 is provided at the center of the bottom plate of the transfer gutter 6 in the front-rear direction and below the supply port for supplying the transfer grains to the storage chamber 8, and evenly spreads the grains into the storage chamber 8. I'm giving back. The grain-sustaining machine 34 is provided outside the front side of the machine wall 5 and is provided with a belt with a bucket conveyor 35 stretched inside, and the upper end portion has a throw-out tube 36 between the transfer gutter 6 and the starting end portion. It is provided and communicated, and the lower end part is the grain collecting gutter 13
A supply gutter 37 is provided between the end portion and the end portion to communicate with each other.

Reference numeral 38 denotes a grain elevator motor, which rotationally drives the belt with the bucket conveyor 35, the transfer spiral in the transfer gutter 6, the diffusion plate 33, the transfer spiral in the grain collecting gutter 13, and the like. .. The moisture sensor 2 is used for the grain elevator 3
The moisture sensor 2 is provided substantially at the center in the vertical direction of
By transmitting an electrical measurement signal from the operating device 20,
The moisture motor 39 is rotated to rotationally drive each part of the moisture sensor 2, and receives the grains falling while being conveyed to the upper portion by the bucket conveyor 35, while crushing the grains by pressure.
The water content of this crushed grain is detected.

The operating device 20 has a box shape, and the drier 1, the moisture sensor 2, the burner 4, etc. are operated on the surface plate of the box to start the operation. Switch 40 (multi-function switch A), drying start switch 41 (multi-function switch B) operated and started during drying work, discharge start switch 42 (multi-function switch C) operated and started during discharge work , A stop switch 43 that is operated when stopping, a screen change switch 44 (multifunctional switch D) that is operated when changing the screen, and a monitor display unit 45 that displays various items on a liquid crystal, and these are installed, dried, and discharged. The functions of the start switches 40, 41, 42 and the screen change switch 44 are changed by turning on the switches, and the functions are displayed at the lowermost position of the monitor display unit 45 as shown in FIG. , Each switch of as of Matazu 13 4
Reference numerals 0, 41, 42 and 43 have a multi-functional structure, and the screen is changed by the screen change switch 44 as shown in FIG.

The control device 46 is provided in the operation device 20, and the ON / OFF of each of the pressure switches 16 of the swelling amount sensors 3 in the rows (a) and (b) is turned on and off from the digital input circuit 47. CP via the D-A conversion circuits 14 and 15
U48 is input to the CPU 48 via the digital input circuit 49, and the operation of the feeding, drying and discharging start switches 40, 41, 42, the stop switch 43, and the screen change switch 44 is input to the CPU 48, and the moisture sensor 2 and The detected value of the hot air temperature sensor 50 or the like is output from the analog input circuit 51 as A-
It is configured such that it is input to the CPU 48 via the D conversion circuit 52, and communication information is input to the CPU 48 via the serial data receiving circuit.

Upon receipt of a command from the CPU 48, the CPU 48 passes through the output circuit 53 and the motors 27,
28, 32, 38, 39, the fuel valve, the fuel pump 29, etc. are started, stopped, and regulated and controlled. Various items are displayed on the monitor display unit 45 via the display circuit 54. It also has a serial data transmission circuit for transmitting communication information. The CPU 48 has a memory 55 and stores the nonvolatile memory 56.

The control unit 46 detects and displays the amount of the loaded grain during the grain loading operation, and is configured as follows. That is, the stake-in start switch 40 for starting the stake-in work is operated, and when this operation is input to the CPU 48, the stake-in work is started (step 10).
1), the voltage depending on the ON state of each of the pressure switches 16 of each of the extension amount sensors 3 in the rows (a) and (b) is the CP.
It is input to U48 (step 102), and the amount of grain overhang is detected from the input voltage according to the conversion table of FIG. 10 (step 103), and it is detected that there is a combination of the voltages of the (a) row and the (b) row. And the amount of stake-in grain is detected from this detection,
Displayed on the monitor display unit 45 (step 104),
This data is returned (step 105).

When it is detected in step 103 that there is no voltage combination, it is detected whether the pressure switch 16 is in the ON state or the voltage is not in the ON state. It is detected (step 106), and the abnormality detection data of this voltage is stored in the memory 5.
5 is stored (step 107), and the abnormal portion is processed (step 108).

When the above-mentioned each amount sensor 3 is in the abnormal state as described above, the operation for setting the drying condition and the screen flow as shown in FIG. 15 can be manually set by the operator, and the setting change screen 1 ( The process proceeds from step 201) to the setting change screen (step 205) in sequence, and when the screen change screen of this setting change screen (step 205) is abnormal in the amount sensor 3, the setting change screen 6 is displayed ( Step 206) is configured to return to the setting change screen 1 (step 201) when normal, and the setting change screen 6 (step 206) and the amount of stake amount setting screen are used when the amount stake sensor 3 is abnormal. It may be configured to display only.

The setting change is started as shown in FIG. 16 (step 301), and it is detected whether the amount sensor 3 is normal or abnormal (step 302). Display items other than are displayed on the monitor display unit 45 (step 303), and it is detected whether the setting change is completed (step 304). If YES is detected, it is detected that the change is completed (step 304). Step 30
5). It may be configured to return to (step 303) when it is detected as NO.

When an abnormality is detected in (step 302), display items other than the setting of the amount of sticking, and the setting and display items of the amount of sticking are displayed on the monitor display section 45 (step 30).
6) It is detected whether the setting change is completed (step 3).
07), and if YES is detected, it is detected as the end (step 305). The configuration may be such that the process returns to (step 306) when detected as NO.

During the grain feeding operation, the pressure switch 16 of the feeding amount sensor 3 is sequentially pushed by the grain from the bottom to be controlled to the ON state, and this ON state is input to the CPU 48. The amount of grain inflated is detected by the input, and the detected amount of grain intruded is displayed on the monitor display unit 45. However, as shown in FIG. 17, the pressure switch 16 may be repeatedly turned on and off, The detected value may fluctuate. At this time, the pressure switch 16 is turned on once, and when this pressure is turned on, the amount of the stuck grain is displayed. It is also possible to adopt a configuration in which the reduction in the amount of grain incorporated is not displayed and the original amount of grain incorporated is continuously displayed. As a result, it is possible to eliminate the variation in the detected value of the amount of grain to be squeezed during the staking operation.

During the grain discharging operation, the pressure switch 16 of the swelling amount sensor 3 is controlled to be in the OFF state by decreasing the grains in order from the upper side, and this OFF state is set to the CP state.
The remaining grain amount is input to U48, and the remaining grain amount is displayed on the monitor display unit 45 by this input, but the pressure sensor ON-OFF may be repeated as shown in FIG. 18, and the detection value may vary. At this time, the pressure switch 16 is turned off once, and by this OFF, the remaining grain amount is displayed. Even if the pressure switch 16 is turned on thereafter, the increase in the remaining grain amount due to this ON is displayed. Instead, the original remaining grain amount may be continuously displayed. As a result, it is possible to eliminate the variation in the detected value of the remaining grain amount during the discharging work.

The operation of the above embodiment will be described below. By operating the operating device 20 to set the drying conditions and operating the drying start switch 41 for starting the drying operation, each part of the grain dryer 1, the burner 4, the moisture sensor 2
Etc. are started, and a set hot air set according to the set amount of grain detected by the amount sensor 3 and the set grain type from the burner 4 is generated. After passing through the drying chambers 9 and 9, the respective exhaust chambers 10 and 10 and the exhaust passage chamber 25 are sucked and exhausted by the exhaust fan 24.

The grains stored in the grain storage chamber 8 are exposed to the hot air while they are flowing down from the storage chamber 8 into the drying chambers 9 and 9 to be dried. It is delivered to the lower part and flows down, and is transferred from the grain collecting gutter 13 through the supply gutter 37 and into the grain raising machine 34 by the lower transfer spiral, and is conveyed to the upper part by the bucket conveyor 35 and transferred through the throwing pipe 36. It is supplied into the gutter 6 and is transferred and supplied from the transfer gutter 6 onto the diffusion plate 33 by an upper transfer spiral, and is uniformly diffused and reduced into the storage chamber 8 by the diffusion plate 33 and is circulated and dried.

When the grain moisture detected by the moisture sensor 2 is the same as the finish target moisture that has been set, it is detected that the drying is completed, and the controller 46 automatically controls the drying. The machine 1 is automatically stopped and the drying of the grain is stopped. At the time of grain adhering work for detecting the amount of grain adhering into the storage chamber 8, the machine wall 5 forming the storage chamber 8
Each pressure of each stake amount sensor 3 provided on the inner side surface, for example, in two rows of (a) row and (b) row, and having different vertical positions for each row and provided at positions according to the number of stones at predetermined intervals in the vertical direction When the switch 16 is pushed by the grain, the pressure switch 16 in the lower position
The ON state is controlled, and these ON states are input to the operation device 20 for each of the (a) row and the (b) row, and the position of each pressure switch 16 in the ON state is detected by this input. It is detected that the grains are stuck to the ON state position, and the amount of stuck grains is detected.

[Brief description of drawings]

 The figure shows an embodiment of the invention.

FIG. 1 is a configuration diagram of a stuck amount sensor.

FIG. 2 is a flowchart.

FIG. 3 is a block diagram.

FIG. 4 is an overall side view in which a grain dryer is partially broken.

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

FIG. 6 is a D-A conversion circuit diagram of the stuck amount sensor.

FIG. 7 is a D-A conversion circuit diagram of the stuck amount sensor.

FIG. 8 is a diagram showing the relationship between the resistance and the resistance value of the stuck amount sensor.

FIG. 9 is a diagram showing the relationship between voltage and amount of swelling.

FIG. 10 is a conversion chart of a voltage stake amount.

FIG. 11 is an enlarged front view of the operating device.

FIG. 12 is an enlarged front view of the operating device.

FIG. 13 is a multifunctional operation diagram of each switch.

FIG. 14 is a screen layout diagram of the operating device.

FIG. 15 is a screen flow diagram illustrating an operation of setting drying conditions according to another embodiment.

FIG. 16 is a flowchart showing another embodiment.

FIG. 17 is a time chart showing another embodiment.

FIG. 18 is a time chart showing another embodiment.

[Explanation of symbols]

 3 Strain amount sensor 8 Grain storage chamber 9 Grain drying chamber 16 Pressure switch 20 Operating device

Claims (1)

[Claims] 1. Grains are fed from an upper grain storage chamber 8 to a lower grain drying chamber 9 while being flowed down and exposed to hot air to be dried. The pressure switches 16 of the swelling amount sensors 3 which are provided at different intervals in the vertical direction at predetermined intervals in the vertical direction are sequentially turned on by the grain pressure.
The stuck-in grain detecting device of the grain dryer, wherein OFF is input to the operation device 20 for each column to detect the amount of stuck-in grain.