JPH08200949A - Grain dryer overhang detector - Google Patents

Abstract

(57) [Summary] [Purpose] Even if the stakeout amount sensor malfunctions, the stakeout amount is accurately detected to stabilize the stakeout work. [Composition] A grain dryer in which several swelling amount sensors are arranged at predetermined intervals in a vertical direction in a storage chamber and the swelling amount is automatically detected by turning on and off each of these sensors. During the stake-in work, the uppermost value when the stake-in amount sensor is ON is read as the amount of stake-in, and only when a higher value than this read uppermost value is input. It is characterized in that control means for controlling to update is provided.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Conventionally, this type of swelling amount detection apparatus has several swelling amount sensors arranged in a storage chamber at predetermined intervals in the vertical direction, and the swelling amount is automatically determined by turning on and off these sensors. It was a configuration to detect.

[0003]

In the prior art, there is a problem that the swelling amount sensor malfunctions due to a hollow phenomenon in the grain and the like, and the squeezing amount cannot be accurately detected. According to the present invention, even if there is a malfunction in the detection of the amount of sticking-in, the amount of sticking-in can be accurately detected and a stable sticking-in operation can be continued. To achieve this purpose,
The present invention has taken the following technical means.

[0004]

That is, in the technical means according to the present invention, several swelling amount sensors are arranged in the storage chamber at predetermined intervals in the vertical direction, and these sensors are turned on.
A grain dryer configured to automatically detect the amount of sticking when it is turned off, and the sticking amount sensor is turned on during the work of sticking.
It is characterized in that the control means is provided for reading the value at the top of the above as the stake amount and updating only when a value higher than the read value at the top is input. To do.

[0005]

[Advantages and effects of the invention] During the staking operation, the uppermost value at which the swelling amount sensor is turned on is read as the amount of squeezing, and the read uppermost value is at the same level or lower. If a value is entered, it will continue as the previous value. Then, it is updated only when a high value exceeding the previously detected value is input.

In short, according to the present invention, during the staking operation, the value when the uppermost stake amount sensor is turned on is always read, and a high value exceeding the read value is input. Since it is configured to update only when it is performed, even if the sticking amount sensor malfunctions, the sticking amount can be accurately detected and the stable sticking work can be continued.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. 1 is a dryer, and a storage chamber 2, a drying chamber 3, and a grain collecting chamber 4 are vertically installed from the upper part, and the drying chamber 3 includes a burner 5
The grain flow-down passages 9, 9 are formed between the hot air chamber 6 having the above and the exhaust air chamber 8 having the suction fan 7, and by the constant rotation of the feeding valves 10, 10 provided at the lower portions of the respective flow passages 9, 9. It is configured such that grains flowing down in predetermined amounts are exposed to hot air and dried.

The grain elevator 11 has a bucket conveyor 1 inside.
2 is stretched so that the dry grain transferred to one side can be picked up and lifted and conveyed to the upper part by the grain collecting transfer spiral 13 provided laterally at the lower part of the grain collecting chamber 4. This sublimation machine 11
Grains thrown out from the upper part of the above are guided and dropped through a throwing gutter 14 to a starting end portion of a transfer gutter 16 which is provided with a transfer spiral 15. The grain transferred by the transfer spiral 15 is guided to a diffusion plate 17 arranged in the upper center of the storage chamber 2 and diffused and dropped into the storage chamber 2.

The moisture sensor 18 is provided at an intermediate portion of the grain raising machine 11, and the moisture motor 19 is rotated by the transmission of an electric measurement signal from the controller, and each portion of the moisture sensor is rotationally driven. , While receiving the grain that is falling while being conveyed to the upper portion by the bucket conveyor 12 and crushing the grain with pressure,
The water content of this crushed grain is detected. The burner 5 is configured such that the kerosene in the fuel tank 21 is supplied by driving the electromagnetic pump 20 and is ignited and burned by ignition by energizing the igniter. The blower fan 22 is rotationally driven at a variable speed by a blower motor 23 to blow the combustion air commensurate with the supplied fuel to the burner 5.

On the side wall of the storage chamber 2, there are provided a plurality of viewing windows 24 for visually observing the amount of grain infused at predetermined intervals in the vertical direction. The stuck amount sensor 25 is arranged in parallel at the same level position as each of the sight windows 24, and has, for example, a grain drying treatment capacity of 4
If it is a dryer of 8 stones, the minimum loading amount is 10 stones (NO. 1)
To 16 stones (NO.2) 20 stones (NO.3) 24 stones (N
O. 4) 28 stones (NO.5) 32 stones (NO.6) 36 stones (NO.7) 40 stones (NO.8) 44 stones (NO.9) and maximum stake 48 stones (NO.10) position It is provided to correspond to. (Refer to FIG. 3) The stuck amount sensor 25 is pushed by the pressure of the stuck grain and turned on.
It has a structure in which a pressure switch for turning off is installed, and a relay box 26 is provided above the transfer gutter 16 and inside the relay box 26, ON-OFF of each pressure switch transmitted via transmission lines 27 and 28. Turn on the digital signal of
The D-A conversion circuits 29 and 30 for converting into an analog voltage corresponding to -OFF are provided, and these D-A conversion circuits 29 and 30 are provided.
30 through the transmission lines 27, 28 and the controller 3
1 is input.

The ON / OFF state of each pressure switch of each stuck amount sensor 25 is detected by the difference in the voltage value input through the D / A conversion circuits 29 and 30.
The ON state detection result of each pressure switch is used to detect that the grain has been squeezed to the ON state detection position, and the amount of the squeezed grain is calculated accordingly. These inputs are input at a predetermined time interval, and the detected amount of spilled grains becomes one item of the setting conditions of the dry hot air temperature generated from the burner 5. I am trying.

During the staking mode (during the staking operation), the uppermost value when the squeezing amount sensor 25 is turned on is read as the squeezing amount, and the read uppermost value is read. In contrast, if a value equal to or lower than this is input, it will continue as the previous value, but it will be updated only when a high value exceeding this previous detection value is input. I am configuring.

For example, as shown in FIG. 5, since the first sensor NO2 is ON at the first input, the uppermost value (2) is read as the amount of sticking and the input 2
At the time of the first time, the sensor NO3 is turned on, and a high value exceeding the previous detection value (2) has been input, so it is updated as the maximum overhang detection value (3) at this time. At the third input, the sensor NO2 is turned on, and a value lower than the previous detected value (3) is input, so the previous detected value (3) is continued as it is. Then, in the next fourth input, when a high value exceeding the previous detection value (3) is input, since the sensor NO4 is ON in this embodiment, the maximum amount of extension at this time is detected. It will be updated as the value (4).

In the pressure-sensitive stake amount sensor, erroneous detection can be reduced by detecting the maximum amount of swelling including the chattering state as the amount of swelling at that time. it can. In the past, we tried not to take in unstable sensor detection, that is, chattering was ignored,
In the embodiment of the present invention, the problem can be solved by shortening the time constant and turning it on even in the chattering state.

FIG. 6 is a control block diagram. The control unit (CPU) 32 of the controller 31 provided inside the machine body is provided with the extension. Dry. Discharge. In addition to input signals such as ventilation mode switches 34, 35, 36, 37, emergency stop switch 38, grain type, overhang amount, finish moisture setting switch, and increase / decrease switch for setting the drying time. , Moisture sensor-18, hot air temperature sensor-
Various detection signals such as 39 are input.

Further, the detection of the paddy flow sensor 40, the input of digital information, and the mode switches 34, 35 and 3 are carried out.
Digital input circuit 41 to which operations 6 and 37 are input, the moisture sensor 18, the swelling sensor 25, and the hot air temperature sensor 3
Analog input circuit 4 to which the detection value detected by 9 is input
2, A-D conversion circuit 43, serial data reception circuit 4
4. Digital input circuit 4 to which memory clear 45 is input
6. A dryer control microcomputer and a memory 47 for performing arithmetic logic operation and comparison operation on the inputs from these circuits 41, 42, 43, 44, 46 are provided.

On the other hand, as an output signal, a motor system such as a blower motor 23 is controlled through an output circuit 48 in response to a command from the microcomputer, and a combustion system such as a fuel valve and an electromagnetic pump 20 is controlled through an output circuit 49. And the moisture motor 19 via the output circuit 50, and the monitor display unit 5 via the display circuit 51.
2 is configured to display information on operation, drying condition setting items, abnormality information, and the like.

In the embodiment shown in FIG. 8, in the pressure-sensitive type tension amount sensor, if the tension mode is in the tension mode for a predetermined time or longer,
The configuration is such that control is performed so that the measured value of the amount sensor of the amount of sticking up to the previous time is updated. That is, when the sensor start is started by the stake-in start and a predetermined time has passed, that is, for example, 5
When the sticking mode continues for more than a minute, the value of the sticking amount stored in the memory is cleared, and the sensor reading maximum value is updated.

Therefore, within this predetermined time, even if various stop switches are erroneously operated, the data of the stake-in amount is not cleared and the immediately preceding data is held. Therefore, by immediately returning this to the squeeze mode, the amount of squeeze thereafter can be accurately controlled. After the elapse of the predetermined time, for example, when the discharge switch 36 is pushed, the hold value of the amount of stake data is cleared.

FIG. 9 shows a flow chart of the dry mode. When the reading of the sensor is started by the dry start and the read value is larger than the memory value, the memory value is cleared. Then, update the sensor reading maximum value. Further, when the read value is smaller than the memory value, it is configured to be set by the squeeze amount memory value.

The embodiment shown in FIGS. 10 to 12 will be described. The DA relay board 53 of the stuck amount sensor 25 is provided with a check lamp 54 for displaying the operating state of the sensor. This relay board 53 is an opening / closing lid 26 that can be opened and closed.
It is removably mounted in the relay box 26 having a via an elastically displaceable locking tool 55. Therefore, at the time of checking, the relay board 53 is removed and the inspection window 56
After being brought into the storage chamber 2 from the storage chamber 2, the locking hook 57 provided on the substrate 53 is locked and held by the engagement hook 59 provided on the ceiling 58 in the storage chamber 2 so that one It is configured so that workers can check it.

[Brief description of drawings]

[Figure 1] Overall side view of grain dryer

FIG. 2 is a vertical sectional front view of a main part of the same.

[Figure 3] Relationship between displayed grain value and amount of swelling

FIG. 4 is a block diagram of a stuck amount sensor.

FIG. 5 is a drawing operation diagram of the drawing sensor.

FIG. 6 is a control block diagram.

FIG. 7 is a side view of the controller panel.

FIG. 8: Flow chart

[Figure 9] Time chart

FIG. 10 is a perspective view of a main part of a dryer.

FIG. 11 is a partially cutaway side view of the same as above.

FIG. 12 is a side sectional view of the main part of the same as above.

[Explanation of symbols]

1 Dryer 2 Storage Room 3 Drying Room 4 Grain Collection Room 5 Burner 6 Hot Air Room 7 Suction Fan 8 Exhaust Chamber 9 Grain Flow Path 10 Feeding Valve 11 Grain Lifter 12 Bucket Conveyor 13 Grain Transfer Spiral 14 Throwing Gutter 15 Transfer spiral 16 Transfer gutter 17 Diffusion board 18 Moisture sensor-19 Moisture motor 20 Electromagnetic pump 21 Fuel tank 22 Blower fan 23 Blower motor 24 Peep window 25 Overhang sensor 26 Relay box 27 Transmission line 28 Transmission line 29 D-A conversion circuit 30 D-A conversion circuit 31 Controller 32 Control unit 33 Controller panel 34 Suction switch 35 Drying switch 36 Discharge switch 37 Ventilation switch 38 Emergency stop switch 39 Hot air temperature sensor 40 Rough flow sensor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kosaki ▲ Rei ▼ No. 1 Yakura, Tobe-cho, Iyo-gun, Ehime Prefecture Izeki Agricultural Machinery Co., Ltd. Agricultural Machinery Co., Ltd. (72) Inventor, Miyazaki Kei-shi, Ehime Prefecture, Iyo-gun, Tobe Town, No. 1 Yakura Agricultural Machinery Co., Ltd. (72) Inventor Masayuki Chikamoto, No. 1 Yakura, Tobe-cho, Iyo-gun, Ehime Prefecture

Claims (1)

[Claims] 1. An ON-OF of each of these sensors, wherein several swelling amount sensors are arranged in the storage chamber at predetermined intervals in the vertical direction.
It is a grain dryer configured to automatically detect the amount of swelling by F, and during the staking work, the value at the top of the stake amount sensor turned on is read as the amount of stake. A stake amount detecting device for a grain dryer, characterized in that control means is provided so as to update the read uppermost value only when a higher value is input.