JPH08254391A - Device for stopping drying apparatus - Google Patents

Abstract

PURPOSE: To prevent an undesirable situation from occurring in which operation of an apparatus is stopped by an operation of pressing a stop switch while a buzzer is being sounded, by providing the stop switch which is to be pressed for turning off an alarming means while the alarming means is giving an alarm and for stopping operation of an apparatus while the alarming means is not giving an alarm. CONSTITUTION: An alarm buzzer is turned off by pressing a stop switch 50 while the alarm buzzer is being sounded. While the buzzer is not outputting an alarm signal and a trouble exists in an apparatus, all outputs are turned off and the apparatus is stopped. If the stop switch 50 is pressed in the state in which the alarm buzzer is not sounded and no trouble exists in the apparatus, a sequence stopping program is executed. That is, if the stop switch 50 is pressed during a feeding operation, all of the outputs from a controller are turned off and operation of the apparatus is stopped. If the stop switch 50 is pressed while a drying switch 48 is pressed, a motor for vertically moving a lift, a valve motor, a dust-exhauster motor, a water content meter output and a solenoid valve are turned off.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Conventionally, in this type of apparatus, a switch for stopping an informing means such as a buzzer and a stop switch for stopping the operation of the machine are separately provided.

[0003]

In such a conventional device, when the buzzer sounds due to an abnormality in the temperature sensor or the like, the stop switch is pushed to deactivate the alarm means such as an alarm device. However, software is installed so that when the stop switch is pressed, abnormality detection is started. Therefore, even if the buzzer is turned off and the condition is cleared, the buzzer sounds when abnormality is detected again. There is.

In addition, in the conventional apparatus, when the storage chamber of the dryer becomes full during the work of stretching the paddy, the buzzer sounds,
The machine is configured to stop operating after a certain period of time, but at this time, if the operator pushes the stop switch, the machine stops operating.

[0005]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above problems, and has taken the following technical measures. That is, in a dryer having an informing means for informing an abnormality during operation, a stake switch, a drying switch, a discharge switch, and a stop switch, if the stop switch is pressed while the informing means is operating, the informing means will be disabled. A dryer stop device is characterized in that it is provided with control means for stopping the operation of the machine when the stop switch is pressed while the notification means is in the inactive state.

[0006]

Embodiments of the present invention will be described below based on the embodiments shown in the drawings. First, the structure will be explained as follows.
Is a frame of a grain dryer, and a storage tank 2, a drying chamber 3, and a grain collecting chamber 4 are vertically installed from the upper part in the frame, and the drying chamber 3 has a burner 5 having a burner 5. Grain flow-down passages 9, 9 are formed between the hot air chamber 6 communicating with the cylinder and the exhaust air chamber 8 communicating with the fan cylinder having the suction fan 7.
By the constant rotation of the feeding valves 10 and 10 provided in the lower part of the above, the grain flowing down by a predetermined amount is exposed to hot air and dried.

[0007] Then, outside the machine frame 1, a grain raising machine 1 for lifting and returning the grains collected on one side of the grain collecting chamber 4 to the storage tank 2.
1 is set up. The grain raising machine 11 includes a bucket belt 13 between a pair of upper and lower drive pulleys 12 and a driven pulley.
Is configured to be wound around and the dry grain transferred to one side by the lower transfer spiral 14 provided laterally below the grain collection chamber 4 can be transferred to the scooping upper part.

Grains scooped by the grain raising machine 11 and thrown at the upper part are guided to the starting end side of a transfer gutter 17 provided with an upper transfer spiral 16 through a spout opening 15. Then, the grain horizontally transferred by the upper transfer spiral 16 is guided by the rotary diffusion plate 18 arranged in the upper center of the storage tank 2 to be diffused and dropped into the storage tank 2.

The grain circulation system consisting of the grain elevator 11, the upper transfer spiral 16 and the lower transport spiral 14 is rotationally interlocked by an elevator motor 19 fixed to the upper side wall of the frame of the grain elevator 11. The motor 19 drive shaft has two drive belts 20, 2
1, the shaft 22 of the upper transfer spiral 16 and the shaft 2 of the drive pulley 12 for winding the bucket belt 13 of the grain elevator 11
3 is directly linked with rotation.

A well-known moisture meter for taking sample grains into the side wall 24 at an appropriate height position of the grain raising machine 11 and crushing the grain to obtain an electric resistance value thereof, and converting it into a grain moisture value 26 is attached. Further, the burner 5 is in the form of a vaporization type burner, and the blower tube 2
Combustion cylinder 28 is connected to the front side of 7, and blower cylinder 27 has a bar.
A namoter 29 is provided, an inverted conical diffuser 31 is provided on one of the motor shafts 30 projecting forward and backward, and a vaporization tube 32 is attached to the upper surface of the diffuser 31 in the opposite direction.

A guide body 33 for guiding atomized fuel is provided in an extended shape on the peripheral surface of the open end of the vaporization cylinder 32. On the other hand, on the other end protruding side of the motor shaft 30, a fan 34 for axially introducing combustion air from an air introduction port 27a opening to the rear side of the blower cylinder 27 is pivotally supported. Reference numeral 35 denotes a blower tube fixedly provided on the center side of the combustion tube 28, and 36 denotes the combustion tube 28.
A plurality of gas ejection holes 3 concentrically with a combustion board fitted to the
7, 37 ... When viewed from the front, the combustion cylinder 28 partially forms a bulging portion, and the bulging portion is provided with an igniter 38 serving as an ignition means including a pair of electrode portions.

The igniter 38 is constructed so that it can ignite the atomized fuel of kerosene supplied from the nozzle 39. 40
Is a frame rod that can detect the presence or absence of a flame, and constitutes a detection unit of the arrival / misfire determination means. The blower tube 27
An air filter 41 is provided on the outer periphery of the air introduction port 27a on the back side.

The burner 5 is a guide wind tunnel 42 having a rectangular cross section.
It is fixed to the inlet portion by a leg portion 43 and a connecting portion 44 which also serves as a handle, and is configured to be attached to a burner barrel 45 communicating with the hot air chamber 6 together with the guide wind tunnel 42. The vaporization burner 5 having the above-described configuration is configured such that kerosene as fuel is supplied by driving an electromagnetic pump 46 provided on the lower surface of the lower pedestal portion of the guide wind tunnel 42, and is ignited and burned by ignition by energizing the igniter 38.

FIG. 6 is a front view of the control panel portion. The structure of this figure will be described. 47 is a stake switch, 48 is a drying switch, 49 is a discharge switch, 5
0 is a stop switch. The function of this stop switch will be described later, but if this stop switch 50 is pressed while the buzzer is sounding, only the buzzer will stop, and if the stop switch 50 is pressed when the buzzer is not sounding, the machine will stop operating. This is the configuration.

Reference numeral 51 is a switch for selecting a grain type, 52
Is a swelling switch for setting the amount of swelling, and 53 is a moisture setting switch. 54 is a liquid crystal display screen for displaying hot air temperature, remaining dry time, and water content, and 55 and 56 are timer switches. When the switch 55 is pressed, the drying time is long, and when the switch 56 is pressed, the drying time is short. The time is changed.

Next, a block diagram of the control system will be described with reference to FIG. A hot air temperature sensor 60, an outside air temperature sensor 61, an exhaust air temperature sensor 62, and a full amount sensor 63 are connected to the controller 57, and further drive an elevator motor 19 for driving the grain raising machine 11 and a feeding valve 10. A valve motor 65, a motor 66 for driving the dust collector, and a thrower motor 67 for driving the thrower are connected.

In addition, a moisture meter 26, a paddy flow sensor 69, an igniter 38, an electromagnetic valve 46, a burner motor 29, a wind pressure sensor 70 and the like are connected to the controller 57. Next, the operation will be described based on the flowcharts of FIGS. When the worker presses the stop switch 50 while the alarm buzzer is sounding, the buzzer is turned off (steps S1 and S6). When the buzzer is not outputting and there is an abnormality in the equipment, all outputs are turned off and the operation of the machine is stopped (steps S2, S3, S5).

If the buzzer does not sound and there is no abnormality and the stop switch 50 is pressed in this state, the sequence stop processing described later is executed (steps S1, S2, S3, S).
4). The contents of the sequence stop processing are shown in the flowchart of FIG.
The stop switch 5
When 0 is pressed, all outputs are turned off from the controller and the machine is stopped, and at the same time, the sequence stop processing command is reset (steps # 1, # 2, # 3).

When the stop switch 50 is pressed while the drying switch 48 is being pressed, the elevator lifting / lowering motor is moved.
The motor 19, the valve motor 65, the dust collector motor 66, the output of the moisture meter, and the electromagnetic valve are turned off, and the post-page timer is set (steps # 4, # 5, # 6). When the timer of the post-page timer expires, the output of the fan motor and the like is turned off, and the cooling of the burner 5 system is completed (steps # 7, # 8).

Stop switch 5 during the operation of the paddy discharge switch
If 0 is pressed, the discharge stop series will
The state of the can number (NO) is confirmed. If NO is 0, the valve motor is turned off and the dust collector motor is turned off (steps # 9, # 10, # 12). Then, the discharge stop sequence NO is set to 1 and the 20-second timer for stopping the operation of the machine is set (step # 13).

When the timer for 20 seconds expires while the discharge stop sequence NO is 1, the operation of the elevator lifting motor is stopped. And the discharge stop sequence NO
Is set to 2 and the slower stop 20 second timer is set (step # 16). When the thrower stop timer counts 20 seconds, the thrower motor is turned off (step # 1
8).

As described above, in the present invention, one stop switch is used for buzzer stop and machine stoppage,
When the buzzer is ringing, only stop the buzzer
Since the machine stop function is provided when the buzzer is not sounding, there is no problem that the machine unexpectedly stops its operation due to incorrect use as in the conventional case.

Next, the ignition determination of the frame rod 40 will be described according to the flowchart of FIG. The feature of this improved program is that the ignition determination time is changed depending on the state of the outside air temperature. That is, when the flame current of the frame rod 40 is detected to determine the ignition,
When the outside air temperature is low, the ignition determination time is lengthened, and when the outside air temperature is high, the determination time is shortened. When the outside air temperature is low, it takes time until the flame is ignited and the flame stabilizes. Therefore, the determination time is lengthened and the igniter 38 is turned on until the temperature becomes stable. Conversely, when the outside air temperature is high, the determination time is shortened and the igniter is shortened. The ON time of 38 is shortened. Briefly describing the flow chart, first, the drying switch 4
When 8 is pressed, the motor output is turned on (step U1,
U2), the detection value of the outside air temperature sensor 61 is read substantially at the same time (step U3).

The sensor read value is converted into temperature (step U4), and the ignition determination time corresponding to the temperature is set (step U5). Then, the combustion system output, the electromagnetic pump 46, and the igniter 38 are turned on (steps U6, U
7, U8), and the misfire signal from the frame rod 40 is read (step U9). If ignition is confirmed by the ignition determination, the igniter 38 is turned off, and ignition is not confirmed at the time of ignition determination, and if that state continues for a certain time, the igniter 3
8 is turned off, ignition mistake processing (machine operation stop)
Is performed (steps U13, 14, 15).

Next, the motor overload determination will be described with reference to FIGS. The controller explained here
La is a controller capable of switching operation in single-phase / three-phase and AC100V / 200V. FIG. 11 shows an outline of the control block. FIG. 12 shows the waveforms of the power supply voltage and the motor current. (A) shows the state when AC100V and (b) shows the state when AC200V. When the operating switch of the dryer (for example, the stake switch 47, the drying switch 48, etc.) is pressed at AC 200 V, the power supply voltage temporarily drops,
The time (T2) until the motor current returns to the rated state is short. On the other hand, when the AC voltage is 100V, the power supply voltage drops largely, a large current flows temporarily, and it takes a relatively long time (T1) to return to the rated value.

If the overload detection time is shortened, AC100V
When switched to, the overload detection means may be activated and may be erroneously determined to be in the “overload state”, and the operation of the machine may stop. For this reason, in this improved program, the overload non-detection time (time when the current state is not observed) at the time of starting the motor is set longer than in the case of AC200V.

The flow chart of FIG. 13 illustrates a control program for automatically correcting rated set values of various motors used in a dryer. In the block diagram of FIG. 11, a motor load current is detected by a CT (current transformer) 75, and a motor overload determination is made by comparing it with a preset motor rated value. In this case, the mode during trial run with no load
The motor load current is detected, and only when the motor current value at that time is smaller than a certain value, the initial rated set value (A0) is automatically corrected and the corrected value is written in the memory 76. In this way, the setting value is automatically corrected if it is within the allowable range with respect to the motor rated value, so the installation location of the dryer, wiring condition, equipment configuration, usage condition of other machines It is possible to correct the set value within the allowable range with respect to the motor rated value according to the power supply situation. As a result, it is possible to prevent inoperability due to overload detection.

Finally, FIGS. 14 and 15 will be described.
This improved device relates to a reset device of a controller, and its characteristic is that the microcomputer constituting the controller is not reset due to the power supply voltage drop at the time of starting the motor. . Reset the microcomputer by using the normal power supply voltage range (18
0V-220V) and instantaneous power failure response time (10msec-
100msec), the original power source is AC100
When the voltage is weak such as V, resetting may occur due to a voltage drop due to motor startup.

In this improved device, the CT (current transformer) 75 detects the motor load current to make an overload determination. At the time of startup, the minimum power supply voltage at which the motor can be started is set in advance, The reset voltage is determined so that the microcomputer is not reset even if the power supply voltage drops to the power supply voltage. FIG. 14 shows the relationship between the power supply voltage and the motor current waveform, where V1 is the lowest voltage that can be started.

In the figure, the power supply circuit 78 of FIG. 15 is arranged so that a reset signal is output when the power supply voltage falls below V1.
The reset voltage is set by the reset circuit 79.

[0031]

Since the present invention is constructed as described above, it has the following technical effects. That is, in a dryer having an informing means for informing an abnormality during operation, a stake switch, a drying switch, a discharge switch, and a stop switch, if the stop switch is pressed while the informing means is operating, the informing means will be disabled Since the operating means is provided with a control means for stopping the operation of the machine when the stop switch is pressed while the informing means is not operating, the operator is confused about the decision and accidentally presses the stop switch to unexpectedly operate the machine. The problem of stopping the operation of is eliminated, and as a result, the operability is remarkably improved.

[Brief description of drawings]

FIG. 1 is a front view of a dryer main body.

FIG. 2 is a front sectional view of a dryer.

FIG. 3 is a sectional view of a burner portion.

FIG. 4 is a sectional view of a burner portion.

FIG. 5 is a front view of a burner unit.

FIG. 6 is a front view of the controller.

FIG. 7 is a control block diagram.

FIG. 8 is a main flow chart.

FIG. 9 is a sub-flow chart

FIG. 10 is an ignition determination flowchart.

FIG. 11 is a control block diagram.

FIG. 12 is a graph showing the relationship between the power supply voltage and the motor current waveform.

FIG. 13 is a flowchart for determining a motor overload.

FIG. 14 is a graph showing a motor start-up waveform.

FIG. 15 is a control block diagram illustrating a reset circuit of a control microcomputer.

[Explanation of symbols]

 1 Machine frame 2 Storage tank 3 Drying chamber 4 Grain collecting chamber 5 Burner 6 Hot air chamber 7 Suction fan 9 Grain flow passage 10 Feeding valve

Claims (1)

[Claims] 1. A dryer having an informing means for informing an abnormality during operation, a stake switch, a drying switch, a discharge switch, and a stop switch, and informing by pressing the stop switch while the informing means is operating. A stopping device for a dryer, characterized in that a control means is provided for stopping the operation of the machine when the stop switch is pressed while the notification means is inactive and the notification means is inactive.