JP2579330Y2 - Abnormal wind pressure detector for grain dryer - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting an abnormal wind pressure of a grain dryer which prevents a malfunction of an alarm apparatus for an abnormal wind pressure due to inertial rotation of a suction blower.

[0002]

2. Description of the Related Art In a conventional grain dryer, the supply of fuel to a heat generator is stopped when the pressure of the suction air suddenly drops during the drying operation due to, for example, breakage of a belt of a suction exhaust fan. because was provided with a wind pressure sensor actuated by the static pressure of the suction air. That is, at the start of the drying operation, the wind pressure sensor is turned on by the suction air generated by the suction exhaust fan, whereby the fuel is supplied to the fire heat generator and combustion is started. If the pressure of the suction air suddenly drops due to an abnormality of the suction exhaust fan during the drying operation, the wind pressure sensor turns off.
F, whereby the supply of fuel to the fire heat generator is stopped. By the way, if the wind pressure sensor is abnormal, even if the rotation of the suction fan of the suction exhaust fan is stopped due to the breakage of the belt or the like and the suction air is no longer generated, the abnormality cannot be detected. Flame rising in the fire heat generator when generating the suction air is stopped, there is a risk of fire or burning grain is <br/> or generated. Accordingly, wind pressure sensor before starting the drying operation to check whether normal or abnormal, in the case of abnormality, it is necessary to issue a warning, FIG its wind pressure abnormality detecting apparatus 6
This will be described below with reference to the flowchart of FIG.

[0003] Power control panel at step 201 is ON, it is determined whether the dry push button is ON at step 202, when the push button is ON, the wind pressure sensor initial check is started in step 203. In step 204, it is determined whether or not the wind pressure sensor is in an ON state.
If it is FF, the drying operation is started in step 205,
If N, the wind pressure abnormality alarm device is activated in step 206.

[0004]

However, in the conventional wind pressure abnormality detecting device, for example, during a drying operation by an operator,
When stopping operation for any reason, immediately turned ON the dry燥押button, to the suction fan of the suction exhauster is coasting, it is determined that the wind pressure sensor is ON by the wind pressure sensor initial check, wind pressure There was a drawback that the abnormal alarm device was activated by mistake.

[0005] The present invention is to overcome the drawbacks of the above conventional apparatus, to prevent erroneous operation of the wind <br/>圧異normal warning device that by the inertial rotation of the suction fan of the suction exhauster, grain drying It is a technical object to provide a wind pressure abnormality detection device for a machine.

[0006]

Means for Solving the Problems] To solve the above problems
The present invention, in the lower part of Rutotomoni before <br/> Symbol dried body provided on refining chamber upper part of the drying machine body, only setting the air drying portion juxtaposed the exhaust air chamber and the drying chamber and the hot air chamber, wherein fire heat generator to the hot air chamber, a suction exhaust fan in the exhaust air chamber, in each contact cereal dryer, oN by the static pressure of the suction air to be Okoshifu by the suction air blower, a wind pressure sensor for OFF, the a wind pressure sensor initial checking means wind pressure sensor is output to the drive unit drying operation start signal if is OFF, for outputting a monitoring signal to the air pressure sensor monitoring unit if the wind pressure sensor is oN,
A wind pressure sensor that outputs a drying operation start signal to a driving device if the wind pressure sensor is turned off within an arbitrary time period, and outputs a wind pressure abnormality signal to an alarm device if the wind pressure sensor remains on even after the arbitrary time period has elapsed. Technical measures were taken to compose a wind pressure abnormality detection device for the grain dryer with the monitoring means.

[0007]

[Function] When the grain in the tempering room flows down in the drying room,
The air is blown up by the heat generator and the suction air blower, and is dried by the drying air passing through the drying chamber from the hot air chamber, and the drying air is discharged out of the machine by the suction air blower. When the drying push button is turned on during the drying operation, an initial check of the wind pressure sensor is performed. In the initial check of the wind pressure sensor, if the wind pressure sensor is OFF, the drying operation is started, and the wind pressure sensor is ON.
, Monitoring of the wind pressure sensor is performed. In the monitoring of the wind pressure sensor, if the wind pressure sensor is turned off within an arbitrary time, the drying operation is started. If the wind pressure sensor remains on even after the elapse of the arbitrary time, the wind pressure abnormality alarm is activated.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. 1 is a partial cross-sectional view of a circulating grain dryer, FIG. 2 is a cross-sectional view of a circulating grain dryer, FIG. 3 is a block diagram of a wind pressure abnormality detecting device, and FIG. 5 is a functional block diagram.

Reference numeral 1 denotes a circulation type grain dryer, in which a refining room 2 is provided at an upper part, and a ventilation drying part 3 is provided at a lower part, and a graining machine 4 is provided on one side to perform a circulation grain drying step. Form. In the ventilation drying section 3, a drying chamber 5, a hot air chamber 6, and an exhaust chamber 7 formed of a perforated wall plate are arranged in parallel, and the upper part of each drying chamber 5 is communicated with the tempering chamber 2. The lower part of the drying chamber 5 is connected to a grain distribution lower passage 8, and a discharge valve 9 is provided at the discharge port. Reference numeral 10 denotes a grain collecting gutter, and a lower conveyor 11 is provided at the bottom thereof, and the lower conveyor 11 is connected to the refining room 2 via the graining machine 4, the upper conveyor 12, and the scattering plate 13.

A belt 16 having a number of buckets 15 attached thereto is placed in a conveyor case 14 of the graining machine 4 by upper and lower pulleys 1.
Wound provided between 7, the upper end of the opening 18 of <br/> AgeKoku machine 4 having a AgeKoku driving motor 20, contact the upper conveyor 12 through a flow-down trough 19.

A guide plate 21 for collecting the returned grain from the bucket 15 is provided between the belts 16 and 16 of the graining machine 4 at an angle. The guide plate 21 is connected to a moisture measuring device 23 via a supply tube 22. Then, the moisture measuring device 23 communicates with the lower opening (not shown) of the belt conveyor case 14 via the discharge gutter 24 and the return gutter 25.

As shown in FIG. 2, air supply ports 27 are respectively opened on the boundary surface between the front wall 26 and the end of each hot air chamber 6,
On the other hand, an exhaust port 29 is opened at a boundary surface between the rear wall 28 and each exhaust chamber 7. The air supply box 30 is provided on the front wall 26.
A fan box 31 is provided on the rear wall 28, a burner box 34 with a built-in burner 33 is provided in the opening 32 of the air supply box 30, and a suction fan 36 is provided in the opening 35 of the fan box 31. Each of the suction and exhaust fans 37 is provided. Reference numeral 38 denotes a wind pressure sensor that operates by the static pressure of the suction wind, and is provided in the burner box 34.
When the pressure of the suction air suddenly drops during the drying operation due to, for example, a breakage of the belt of the suction exhaust fan 37, the burner 33
Is a safety device for stopping the supply of fuel to the vehicle.

FIG. 3 is a block diagram of a wind pressure abnormality detecting device. A wind pressure sensor 38 is connected to a CPU 41 for calculating various input values via an input circuit 40 of a control device 39, and a driving device 42 for operating the burner 33 and the like. and an alarm device 43 that generates a buzzer sound is contacted to the CPU via the output circuit 44, further, an operation panel 45 provided with a drying pushbutton such as a CPU
Contact

[0014] In the functional block diagram of FIG. 5, reference numeral 46
Is a wind pressure sensor initial check means, the 47 is a wind pressure sensor monitoring unit.

Next, the operation of the above configuration will be described.
Grains (eg, paddy) supplied to a hopper (not shown)
It is transported by the graining machine 4, passes through the upper carrier 12, and is uniformly scattered and deposited from the scatter plate 13 into the conditioning room 2. The burner 33 and the suction / exhaust air blower 37 are operated to release the discharge valve 9.
Is rotated, the grains in the conditioning room 2 flow down in the drying room 5. The drying air blown by the burner 33 and the suction exhaust fan 37 flows into the hot air chamber 6 through the opening 32, the air supply box 30, and the air supply port 27, and flows from the hot air chamber 6 to the exhaust air chamber 7 in a lateral direction. The grains flowing down in the drying chamber 5 are dried by the drying air flowing through the drying chamber. The drying wind that dries the grain to high humidity
The air is exhausted from the air discharge chamber 7 to the outside of the air blower 37 by the rotation of the suction fan 36 of the air blower 37 through the air outlet 29, the fan box 31, and the opening 35.

The grain dried by the drying air flows down the grain distribution lower passage 8 and is intermittently discharged by a discharge valve 9.
The discharged grain flows down the grain collecting trough 10 and is transported to the lower conveying machine 1.
1 and sent to the graining machine 4 and re-entered into the tempering room 2,
It is circulated and dried until the moisture measuring device 21 detects a predetermined moisture.

The grain pumped by the grain lifting machine 4 spills from the bucket 15 between the two belts 16, 16 due to vibration during transport and discharge to the downflow gutter 19. The spilled grain is collected on the guide plate 21 and is supplied from the guide plate 21 to the supply cylinder 2.
2 and is supplied to the moisture measuring device 23 to measure the moisture of the grain. The grain whose moisture has been measured is discharged from the water measuring device 23, flows down the discharge gutter 24, and is supplied from the return gutter 25 to the lower part of the conveyor case 14.

Next, the operation of the wind pressure abnormality detecting device will be described with reference to the flowchart of FIG. In step 101, the power of the operation panel 45 is turned on. In step 102, it is determined whether or not the drying push button is turned on. If the drying push button is turned on, an initial check of the wind pressure sensor is started in step 103. At step 104, it is determined whether or not the wind pressure sensor 38 is ON. If OFF, the process proceeds to step 105 to start the drying operation. If ON, the process proceeds to step 106 to monitor the wind pressure sensor. Any time (e.g. 6 seconds) over ON the wind pressure sensor 38 at step 107, OFF is determined, it is started the drying operation proceeds to step 105 if the OFF, any time the flow goes to step 108 if remains ON Is determined. If the arbitrary time has not elapsed, the process returns to step 106 to determine whether the wind pressure sensor 38 is ON or OFF again. If the wind pressure sensor 38 remains ON when the arbitrary time has elapsed, the wind pressure sensor 38 is abnormal (failure). Is determined, and step 1
Moving to 09, the wind pressure abnormality alarm is activated.

[0019]

[Effect of the invention] Conventionally, the operator stops the operation during the drying operation
From to, immediately again ON dried pushbutton Then, in order to suction fan of the suction exhauster is coasting, it is determined that the wind pressure sensor is ON by the wind pressure sensor initial check, incorrect air pressure abnormality warning device Was activated. However, in the wind pressure abnormality detecting device of the present invention, a wind pressure sensor monitoring means is provided to turn on and off the wind pressure sensor for an arbitrary time.
Monitor for OFF. Accordingly, if the wind pressure sensor is normal, as the rotation of the suction fan decreases, the wind pressure sensor is turned off within an arbitrary time and the drying operation can be started. Therefore, the wind pressure abnormality alarm device is not erroneously operated due to the inertial rotation of the suction fan of the suction exhaust fan.

[0020]

[Brief description of the drawings]

FIG. 1 is a partially broken circulating grain dryer according to an embodiment of the present invention .
It is a sectional front view.

FIG. 2 is a cross-sectional view of FIG.

FIG. 3 is a block diagram of a wind pressure abnormality detection device.

FIG. 4 is a flowchart of a wind pressure abnormality detection device.

FIG. 5 is a functional block diagram.

FIG. 6 is a flowchart of a conventional wind pressure abnormality detection device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Circulation type grain dryer 2 Temper room 3 Ventilation drying part 4 Graining machine 5 Drying room 6 Hot air room 7 Exhaust air room 8 Grain logistics lower passage 9 Discharge valve 10 Gathering gutter 11 Lower transporter 12 Upper transporter 13 Flying disc Reference Signs List 14 Conveyor case 15 Bucket 16 Belt 17 Pulley 18 Opening 19 Downflow gutter 20 Grain drive motor 21 Guide plate 22 Supply cylinder 23 Moisture measuring device 24 Drain gutter 25 Return gutter 26 Front wall 27 Air supply port 28 Rear wall 29 Air outlet 30 Air supply box 31 Fan box 32 Opening 33 Burner 34 Burner box 35 Opening 36 Suction fan 37 Suction exhauster 38 Wind pressure sensor 39 Control device 40 Input circuit 41 CPU 42 Drive device 43 Alarm device 44 Output circuit 45 Operation panel 46 Wind pressure sensor Initial check means 47 Wind pressure sensor monitoring means

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) F26B 25/00 F26B 17/14 F26B 21/10

Claims (1)

(57) [Scope of request for utility model registration] 1. A top to tempering chamber of the drying machine body provided Rutotomo
Wherein the lower portion of the drying body, set the air drying portion juxtaposed the exhaust air chamber and the drying chamber and the hot air chamber only, the fire heat generator to the hot air chamber, a suction exhaust fan in the exhaust air chamber, contact each A wind pressure sensor that is turned on and off by the static pressure of the suction air generated by the suction air blower, and a drying operation start signal is output to a driving device if the wind pressure sensor is off, If the sensor is ON, a wind pressure sensor initial check means that outputs a monitoring signal to the wind pressure sensor monitoring means, and if the wind pressure sensor is turned off within an arbitrary time, a drying operation start signal is output to the driving device, and the arbitrary time elapses. And a wind pressure sensor monitoring means for outputting a wind pressure abnormality signal to an alarm device if the wind pressure sensor remains ON.