JPH02166384A - Control indicator for grain dryer - Google Patents

Abstract

PURPOSE:To make it possible to decide easily whether an emergency fuel state is originated from a fuel system or a combustion air system during a test run by indicating alternately supply quantity of fuel to a drying burner, a ventilation quantity of combustion air, and an emergency dried spot with a changer over operation. CONSTITUTION:When a change over switch 37 of a control indication device 5 is turned on during a test run, an opening time of a solenoid valve used to supply fuel is displayed on an indication window 38 so that a supply quantity of fuel may be confirmed. A rotary speed of a blower to ventilate the combustion air is also displayed on the indication window alternately so that a ventilation quantity of combustion air may be obtained. Responding with these, an attempt is mad to manipulate a grain type setting knob 34 and a feed quantity setting knob 35 so as to compare the opening time of the solenoid valve at a preset hot air temperature, a numerical value of the rotary speed, and an indicated numerical value of the blower respectively.

Description

[Detailed description of the invention] Industrial applications This invention is f! The present invention relates to a control display device for a grain dryer.

Conventional technology Conventionally, a control display device generates a set hot air temperature from a drying burner, and alternately displays the generated hot air temperature and, if an abnormality occurs in the dryer, an abnormality display of the drying abnormality. Met.

Problem to be Solved by the Invention By operating the control display device to set the temperature of the hot air generated from the drying burner, and operating this control display device, the dryer can be started at the same time. The drying burner is started to generate a set hot air temperature, the grains flowing down the drying chamber are exposed to this hot air temperature and dried, and during this drying, this hot air temperature is displayed on the control display device,
Further, if a drying abnormality occurs in this dryer, the abnormal location is displayed on this control display device.

Before starting this drying work, a test run is performed, but if an abnormal combustion state occurs in the drying burner during this test run, it is easy to determine whether this abnormal combustion state is caused by the fuel system or the combustion air system. I am trying to make it possible.

Means for Solving the Problems The present invention is characterized in that by switching operations, the display of the amount of fuel supplied to the drying burner (1), the display of the amount of combustion air blown, and the display of abnormalities in drying abnormalities are performed alternately. This is the configuration of a control display device for a grain dryer.

Effect of the Invention When starting the drying of grains, the temperature of the hot air generated from the drying parna (1) is set by operating the hot air temperature setting button on the control and display device, and by operating this control and display device. At the same time as the dryer starts, this drying burner (1) starts and generates a set hot air temperature, and the grains flowing down the drying chamber are exposed to this hot air temperature and dried, and during this drying, this hot air The temperature is displayed on the control display device, and if a drying abnormality occurs in the dryer, this abnormality is displayed as an abnormality.

Also, when performing a trial run, the test run mode is entered by operating the trial run switch provided on this control display device and switching operation of the changeover switch, and at this time, the drying burner (1
) and the amount of combustion air blown at this time are alternately displayed on this control display device.

Effects of the Invention According to the present invention, when the combustion state of the drying burner (1) becomes red or a misfire occurs during a test run, the switching operation can be performed to switch the drying burner (1) at this time.
1) By alternately displaying the amount of fuel supplied and the amount of combustion air blown, the causes of these abnormal phenomena can be easily estimated, and countermeasures against these abnormalities can be easily taken.

In addition, the model of the dryer (2) (3y is a rectangular shape that is long in the front and rear direction, consisting of front and rear wall plates and left and right wall plates, and a burner with a drying burner (1) installed in this front wall plate) The case (4) and the dryer (2) are provided with a control display device (5) for starting and stopping operations or displaying information, and an exhaust fan (6) is provided on the rear wall plate. A fuel pump (7) having an electromagnetic valve is provided on the outside of the lower plate of the burner case (4), and this fuel pump (7) operates the fuel tank (8).
) is configured to suck in fuel and supply it to the drying burner (1), and also blows air to the outside of the lower plate! : & (9) and a variable speed motor (10) are provided, and the rotation of the variable speed motor (10) drives the blower (9).

It is configured to supply combustion air to the drying burner (1),
Inside the burner case (4) is an air flow sensor (28) that detects the presence or absence of outside air passing through the burner case (4).
A flame sensor (30) for detecting combustion flame is provided at the front of the drying burner (1).

A storage chamber (11) is formed in the upper part of the model (3), and a drying chamber (13) is provided below the storage chamber (11) with a feeding valve (12) for feeding and flowing down the grains. A grain collection gutter (10) equipped with a transfer spiral is installed on the lower side of the drying chamber (13) and communicated with each other. is equipped with a hot air temperature sensor (
A hot air chamber (16) is formed in which a hot air chamber (15) is provided.
1B) and the drying burner (1) are configured to communicate with each other, and a ventilation chamber (17) is formed outside the drying chamber (13).
Each of the ventilation chambers (17) and the ventilation fan (6) are configured to communicate with each other, and a motor (18) is provided at the bottom of the rear wall plate.
This motor (1B) is configured to rotationally drive the transfer spiral, each delivery valve (12), the exhaust air Ia (6), etc. in the grain collection gutter (14).

A ceiling plate (19) and a transfer gutter (20) equipped with a transfer spiral are provided on the upper side of the storage chamber (11), and this transfer gutter (20)
A supply port for supplying transferred grains into the storage chamber (11) is provided in the center, and a diffusion plate (21) is provided below the supply port.

The shell lifter (22) is installed in the front part of the front wall plate, and inside thereof, a packet conveyor (23) belt is stretched between the upper and lower pulleys, and between the upper end and the starting end of the transfer gutter (20). A dispensing tube (24) is provided and communicated with the dispensing tube (24), and a grain circulation sensor (31) for detecting grains passing through the dispensing tube (20) is provided in the dispensing tube (24). section and said grain collecting trough (14)
A supply gutter (25) is provided to communicate with the terminal end, and a motor (2B) is provided on the top of this grain hoist (22), and this motor (26) operates the packet conveyor (23) belt,
The transfer spiral and the spreader plate (21) in the transfer gutter (2θ)
In addition, in the vertical direction, the central part receives the grains that fall while being conveyed to the upper part by the packet conveyor (23), crushes the grains under pressure, and at the same time crushes the crushed grains. This configuration includes a moisture sensor (28) equipped with a motor (27) for detecting moisture.

The electromagnetic valve has an opening time (ONT) of the electromagnetic valve.
ime) controls the amount of fuel sucked into the fuel pump (7), and this ON time is, for example, 7 to 40
This is the configuration set to m5ec, and this ONT i me
When the fuel flow rate is 7ms e c, the fuel flow rate is 0.717H to 40m5e c, the fuel flow rate is 3.7 hours. On the surface plate of the box, there are start switches (32) for starting the dryer (2) for each task, a test run switch (45) for starting the dryer 41 (2), and a stop switch (45) for stopping the dryer (2). 33), a grain type setting socket (34) for setting the temperature of the hot air generated from the drying burner (1), a filling amount setting socket (35), a moisture setting socket (35) for setting the finishing target moisture content of grains. 36), the drying burner (
1) An on/off switch (37) that switches to display the amount of fuel supplied and the amount of combustion air blown, hot air temperature, grain moisture, remaining drying time, abnormal locations, amount of fuel supplied, and amount of combustion air blown The structure is equipped with a display window (38) that alternately displays the following information, a monitor display, etc., and a control device (
3111), a display switching control device (40) and each current detection device (41) that individually detects the current of each of the motors (10), (18), (2B), and (27), Each of the setting holes (34), (35), and (3B) is a rotary switch type, and these grain type setting holes (
34) and the operating position of the tensioning amount setting knob (35),
The opening time of the electromagnetic valve is set, the temperature of the hot air generated from the drying burner (1) is set, and the finishing target moisture content of the grains is set depending on the operating position of the moisture setting knob (311). It is.

The display switching control device (40) includes the changeover switch (37).
) and an input circuit (42) into which the operation of the trial run switch (45) is input, and a CPU which performs arithmetic and logical operations, comparison operations, etc. on the inputs input from this input circuit (42).
(43) This configuration includes an output circuit (44) that receives and outputs various commands from the CPU (43).

The switching control by the display switching control device (40) is such that when the operation of the changeover switch (37) and the test run switch (45) is input to the CPU (43), the test run mode is entered. ), the opening time (ONTime) of the fuel valve represents the amount of fuel supplied to the drying burner (1), and the rotational speed of the blower (9) represents the amount of combustion air blown at this time. and the CPU (
43), and whether each displayed value is normal or abnormal can be determined, for example, by checking these displayed values and the operation manual for each setting (30 (35)). Opening time (ONT) of the fuel valve listed by position
ime) and the rotational speed of the blower (9), and even when it is determined that there is an abnormality, it can also be determined whether it is on the fuel system side or the combustion air system side. It is.

The control device (39) controls the hot air temperature sensor (15).
And the detection value detected by the moisture sensor (28) is A-D.
An A-D converter for conversion, an input circuit into which the converted value converted by this A-D converter is input, an air volume sensor (29) of each of the above-mentioned sensors, a flame sensor (30), and a grain circulation sensor (31). ), an input circuit into which the detection of the current detection device (41) is input, and each of the switches (32) and (33).
and an input circuit into which the operations of each of the setting circuits (34), (35), and (3B) are input; and the CPU (43) which performs arithmetic and logical operations, comparison operations, etc. on various input values input from these input circuits. ), and an output circuit that receives and outputs various commands from the CPU (43).

The combustion control, drying control, and stop control by the control device (38) are performed based on the set hot air temperature and the hot air temperature set by the operation of the grain type setting switch (30) and the charging amount setting knob (35). The CPU (43) compares the detected hot air temperature detected by the sensor (15), and if there is a difference, the opening time of the electromagnetic valve is controlled so that the hot air temperature becomes the same as the set hot air temperature. Setting loneliness (36)
When the moisture sensor (28) detects the same grain moisture as the set finish target moisture set by the operation of the CPU (
43) to automatically stop the dryer (2), and an air volume sensor (29) of each of the sensors.
, the flame sensor (3G), the grain circulation sensor (31), and the current detection device t (39) detect an abnormality, the detected abnormality is displayed in the display window (38) with numerical values or symbols.
At the same time, the CPU (43) automatically controls and automatically stops the dryer (2).

Hereinafter, the operation of the above embodiment will be explained.

Each setting (30, (35), () of the control display device (5)
3B) to a predetermined position and the start switch (32) to start the drying operation, the dryer (2),
The drying burner (1) and the moisture sensor (28) are started, hot air is generated from the drying burner (1), and this hot air is passed from the hot air chamber (1B) to the drying chamber (13) and then to the exhaust chamber (17).
The grains flowing down from the storage chamber (11) into the drying chamber (13) are exposed to this hot air and dried, and then are sent to the lower part by the delivery valve (12). The grains are fed out and flowed down into the grain collection gutter (10), and the grain is fed into the grain collection gutter (14
) through the supply gutter (25) into the shell elevator (22) by the lower transfer spiral, transported to the upper part by the packet conveyor (23), and then via the dispensing cylinder (20) into the transfer gutter (20). from this transfer gutter (20) onto the diffusion plate (21) by the upper transfer spiral, and this diffusion Ml (2
1), it is evenly diffused and reduced into the storage chamber (11), and is circulated and dried so that the moisture sensor (28) detects the moisture setting amount (3).
When the dryer (2) is automatically controlled by the control device (33) of the control/display device t(5), the dryer (2) is automatically stopped when the same grain moisture as the finishing target is detected by operating B).

When performing a trial run, the dryer (2), The drying burner (1) and the moisture sensor (2)
8) is started, and during this trial run, the drying burner (1)
When the combustion state of the engine becomes an abnormal red-flame combustion state or a combustion state that is likely to cause a misfire, it is necessary to check the Changeover switch (37) of control display device (5)
) to the entry side, the opening time (ONTime) of the electromagnetic valve that supplies fuel during this combustion state will be displayed on the display window (3B), allowing you to know the amount of fuel to be supplied.
In addition, there is a blower (9) that blows the combustion air when this fuel is supplied.
) is displayed alternately on the display window (38), and the amount of combustion air blown can be known. An abnormality is determined by comparing the opening time of the solenoid valve and the rotation speed of the blower (9) at the set hot air temperature and the set numerical values with the displayed numerical values.

Also, when the air flow sensor (29)', flame sensor (3G), grain circulation sensor (31), current detection device M (41), etc. detect an abnormality, the abnormality detection location is displayed on the display window (38). At the same time, said control device! Under automatic control (311), the dryer (2) is automatically stopped.

In this embodiment, the rotation speed of the blower (9) is displayed as a calculated value based on the Ontime control signal.
If a rotation detector is installed on the shaft of the blower (9) so that the number of revolutions can be directly detected, in addition to abnormalities in the control signal from the CPU, abnormalities in the drive circuit to the blower (9) and the blower (9) motor itself can be detected. It can contribute to the discovery of abnormalities.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a block diagram, Fig. 2 is a flowchart, Fig. 3 is a relation between the opening time of the electromagnetic valve and the flow rate of supplied fuel, and Fig. 4 is a diagram. A diagram of the relationship between the opening time of the electromagnetic valve and the rotational speed of the blower, Figure 5 is an overall side view of the dryer that can be partially cut away, and Figure 6 is A in Figure 5.
-A side view, and FIG. 7 is a partially cutaway front view of a part of the dryer. In the figure, symbol (1) indicates a drying burner.

Claims (1)

[Claims] A control display device for a grain dryer, characterized in that a switching operation alternately displays the amount of fuel supplied to the drying burner (1), the amount of combustion air blown, and the location of abnormal drying.