JPH0350414A - Burner control device for grain particle drying machine - Google Patents

Abstract

PURPOSE:To eliminate within a predetermined time an irregular control, cause an operation to be continued upon elimination and further to improve an operability by a method wherein after an occurrence of the irregular control, the number of revolution of an air blowing motor is set at a predetermined number of revolution and rotated. CONSTITUTION:A fuel flame and surrounding air passing around a burner 1 are mixed to each other to make a drying hot air. If a color state of the cumbustion flame is poor, each of setting knobs 13 and 14 of an air amount device 32 is operated to cause a better combustion flame color to be attained. During this drying period, if an abnormal inout value for the control of the number of revolution of an air blower motor 2 is inputted to an amount of air controlling device 3 of the air volume device 32, the number of revolution of the air blower motor 2 is set at a predetermined number of revolution and at the same time a temperature of hot air from a burner 1 is limited to a predetermined low temperature, the combustion is continued for a predetermined period of time. If the abnormal value is inputted again even after an elapsing of the predetermined time, an alarm is generated from an alarm device 55 and at the same time a combustion of the burner 1 is stopped. In addition, a set hot air temperature and a hot air temperature detected by a hot air temperature sensor 21 are compared by a combustion control device. If a temperature difference is high, it is set in CPU and controlled within a short period of time stored.

Description

[Detailed description of the invention] Industrial applications This study relates to burner control devices for grain driers and the like.

BACKGROUND ART Conventionally, when improper control of an air volume control device that controls the rotation of a blower motor that supplies combustion air for a burner occurs, for example, when rotation or rotation other than the specified rotation occurs, the blower motor is immediately controlled to stop. The combustion of the burner was controlled to stop.

Problems to be Solved by the Invention Combustion air commensurate with the amount of fuel supplied to the burner is controlled by an air volume control device that controls the rotation of a wind control motor, so that combustion air commensurate with the amount of fuel supplied is supplied. This burner burns, but if improper control occurs in the air volume control device during this combustion, for example, rotation other than the specified speed, the air control motor is immediately controlled to stop, and the combustion of this burner is immediately controlled to stop. However, even in a state where the improper control would be restored if combustion continued for a predetermined period of time, work efficiency could be lowered by controlling immediate combustion to stop.

Means for Solving the Problems This invention solves the problem of an improper control of an air volume control device (3) that controls the air volume of a blower motor (2) that supplies combustion air for a burner (1). ) is fixed at a predetermined rotation speed and the burner (1) is stopped by detecting control irregularity.

Effects of the Invention Combustion air commensurate with the amount of fuel supplied to the burner (1) is supplied to the air volume control device (which controls the rotation of the air conditioning motor (2)).
3), the burner (1) is supplied with combustion air commensurate with the amount of fuel supplied, and the burner (1) burns.
If rotation control other than the specified one occurs, the relevant wind control motor (2)
The rotational speed of the M.
If the improper control is not resolved within this predetermined time, the air conditioning motor (2) is controlled to stop, and the burner (2) is stopped.
When the combustion in step 1) is controlled to stop and the improper control is resolved within a predetermined period of time, the rotation speed of the wind control motor (2) is unlocked and the rotation speed of the wind control motor (2) is increased. The burner (1) burns in a controlled manner.

Effects of the Invention According to the present invention, even if improper control occurs in the air volume control device (3) that controls the rotation of the air conditioning motor (2), for example, rotation other than the specified speed occurs, the air conditioning motor (2) can be immediately stopped. As a result, the combustion of the burner (1) is no longer controlled to stop immediately, and the air conditioning motor (
By rotating with the same rotation speed fixed at a predetermined rotation speed in 2), this control irregularity may be resolved within this predetermined time, and when it is resolved, work can be continued and work efficiency is improved. In addition, since the stop control is performed only when the improper control is not corrected, when the moisture content is close to the finishing target moisture content, the combustion is continued for a predetermined time without being immediately stopped, improving workability.

Example: The diagram shows the burner (1) used in the grain drying machine (4).
I will explain about it.

The machine wall (5) of the dryer (4) has a rectangular shape that is long in the front and back direction, and the machine wall (5) on the front side has an operating device (6) for starting and stopping the dryer (4). ) and the burner (
The burner case (7) is equipped with a burner case (7) containing a blower (8) and a motor (9) on the rear wall (5).
).

A fuel pump (10) having a fuel valve is provided on the outer side of the lower plate of the burner case (7), and when the fuel valve is opened and closed, the fuel pump (10) sucks fuel from the fuel tank (11), and the burner ( 1), and a blower (12) and a variable speed blower motor (2) for driving the blower (12) to rotate at variable speeds are provided on the outside of the upper plate, and the rotation of this blower motor (2) The blower (12) is rotationally driven to supply combustion air commensurate with the supplied fuel to the burner (L).
), and a box-shaped air volume device (32) is provided on the outside of the side plate, and inside this air volume device (32), the air volume is controlled by controlling the rotation speed of the fan motor (2). The air volume control device (3) has an air volume control device (3) on the surface plate of this air volume device (32), and a rotary switch on the surface of the air volume device (32) to set the air volume by adjusting the manual operation position.
) and an inclination setting knob (14) for setting the inclination of this air volume by adjusting the manually operated adjustment position, and each of these knobs (13) and (14) is set to a predetermined value depending on the operating position. This is the configuration that will be used.

A storage chamber (15) is formed in the upper part of the inside of the machine wall (5), and a drying chamber (17) equipped with a delivery valve (16) at the bottom of the storage chamber (15) is installed between the ventilation nets. Two drying chambers (17) are formed and communicated with each other, and a hot air chamber (18) is installed between the inner sides of each drying chamber (17).
is formed and communicated with the burner (1), and this hot air chamber (
A hot air temperature sensor (21) is provided inside the drying chamber (18), and an exhaust chamber (19) is formed outside each of the drying chambers (17) to communicate with the exhaust fan (8>). Drying room (17)
A grain collection element (20) equipped with a feeder spindle is installed on the lower side and communicated with it. 8) etc. is configured to rotate.

A ceiling plate (22) and a transfer gutter (23) equipped with a transfer fan are provided above the storage chamber (15), and the transfer gutter (23)
A supply port for supplying transferred grains into this storage chamber (15) is provided in the center, and a supply port is provided below this supply port.
The structure includes a diffusion plate (24) that uniformly diffuses and returns the grains.

The grain raising machine (25) is installed in the front part of the front machine wall (5), and inside, a packet conveyor (26) belt is stretched between the upper and lower pulleys, and the upper end and the starting end of the transfer @ (23) A discharging tube (27) is provided between the lower end and the terminal end of the grain collection (20), and a supply gutter (28) is provided between the lower end and the terminal end of the grain collection Jtjli (20).
The motor (29) of the grain hoist (25) transports the packet conveyor (26) and the transport! The transfer spiral in (23) and the spreading plate (24)
In addition, a motor (3) is installed approximately at the center in the vertical direction to receive grains that fall while being conveyed to the upper part of the packet conveyor (26) and to detect the moisture content of the grains.
0) is provided with a moisture sensor (31) built-in.

The burner (1) is provided with a blower tube (33) at the rear, and a combustion tube (34) and a diffusion tube (
35), a spout plate (36), etc. are installed, and this diffusion tube (35) is installed.
) is configured to be rotated by a motor (37) in the blower tube (33), and the combustion tube (34) has a diffusion tube (35).
Ignition heater (38) that ignites some of the fuel scattered from the
and a flame sensor (39) for detecting combustion flame, the fuel supplied into the diffusion cylinder (35) and combustion air are mixed and ignited, and this ignited fuel is Combustion occurs while being ejected from the ejection hole (40) of the disc (36) and the ejection port (41) formed between the ejection disc (36) and the diffusion tube (35>), and this combustion flame and the burner ( 1) It has a configuration in which the outside air passing through the surrounding area is mixed with the hot air for drying.

The operating device (6) is box-shaped, and the surface plate of the box has a start switch (42) and a stop switch for starting the dryer (4) for each loading, drying and discharging operation. a stop switch (43) for setting the temperature of the hot air generated from the burner (1), each temperature setting button (44) for setting the temperature of the hot air generated from the burner (1) by the operating position; 45) A display window (46) that displays hot air temperature, grain moisture content, remaining drying time, etc. W
The structure is equipped with a warning device (55), a monitor display, etc., and a drying control device (47) and a combustion control device (47) are installed inside.
8), and each of these settings (44)
, (45) is a rotary switch type, and has a configuration in which a predetermined value is set depending on the operating position.

The combustion control device (48) includes the hot air temperature sensor (2)
) and the detection value detected by the flame sensor (39) as A-
An A-D converter (49) that performs D conversion, an input circuit (5) into which the converted value converted by this A-D converter (49) is input.
0), an input circuit (51) in which the operation of each temperature setting setting (44) is performed manually, and each of these input circuits (50), (51
) A CPU (52) that performs arithmetic and logical operations, comparison operations, etc. on various input values input from the CPU (52), and an output circuit M (53) that receives various commands from this CPU (52) and outputs them.
This is a configuration with a

The drying control device (47) includes the moisture sensor (31)
an A-D converter for A-D converting the detected value detected by the A-D converter, an input circuit into which the converted value converted by the A-D converter is input, each of the switches (42) and (43), and the moisture setting. An input circuit into which the operation of hunting (45) is input, and a circuit which performs arithmetic and logical operations, comparison operations, etc. on various input positions input from these input circuits. CPU (52), this CPU
(52) This configuration includes an output circuit that receives various commands and outputs them.

The air volume control device fi! (3) is each setting hunting (1
3), an input circuit (54) into which the operations of (l4) are inputted.
, the CPU (52) which performs arithmetic and logical operations, comparison operations, etc. on various input values input from this input circuit (54);
This configuration includes the output circuit (53) that receives various commands from the CPU (52) and outputs them.

Combustion control by the combustion control device (48) and front air volume control device R (3) is performed by detecting the hot air temperature generated from the burner (1) by the hot air temperature sensor (21), and comparing this detected hot air temperature with each of the above-mentioned hot air temperatures. A set hot air temperature set by operating a setting control is compared, and if there is a difference, the number of opening and closing of the fuel valve is controlled so that the temperature is the same as the set hot air temperature,
The amount of fuel taken in by the fuel pump (IO) is controlled by the combustion control device (48), and at the same time, combustion air commensurate with the amount of supplied fuel is controlled so that the rotational speed of the blower motor (2) is adjusted to this amount of air. It is controlled by a control device (3), the blower (12) is rotationally driven by the blower motor (2), and air is blown by the blower (12).

If the combustion flame color is poor during this combustion, +):i
1Yj settings of the air volume control device (3) (l3);
When the position (l4) is manually operated, the input value of this operation is inputted to the CPU (52) to control the air volume and the slope of this air volume, resulting in a good combustion flame color. The input value of the rotation speed of the blower motor (2) by the operation of each of these settings (l3>, (14)) is determined by the CP(J(5)
2), if an abnormal value other than the setting memory value set and stored is inputted, and the control malfunctions, the rotation speed of this blower motor (2) is set and stored in the CPU (52). The number of rotations is fixed at the specified number of rotations during the specified time period that has been set and memorized, and the amount of air blown is controlled to a constant amount. If an abnormal value is manually input again after this predetermined time, the alarm device (55) issues an alarm and at the same time, the combustion control device frt. (4
8) H'J volume control HH position (3) This is a configuration in which the combustion of the burner (1) is controlled to stop by the controller.

The drying control by the drying control device (47) is performed when the moisture sensor (31) detects the same grain moisture as the finishing bar moisture set by operating the moisture setting control 05). 47) to automatically control the dryer (4).
It is configured to automatically stop.

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

Each setting of the operating device (6) (44), (44), (
The grain dryer (
4), the burner (1), the moisture sensor (3l), etc. start, the ignition heater (38) of this burner (1) becomes red hot, and the fuel is pumped from the fuel tank (l1) to the fuel pump (10).
) and supplied into the cylinder (35), and the combustion air is supplied into the diffusion cylinder (35) by the blower (12) and mixed with fuel, and a part of this fuel is used for the ignition. The fuel is scattered to the heater (38) and ignited to start combustion, and the fuel is vaporized, and the vaporized fuel is injected from the ejection hole (40) and the ejection port (41) of the ejection plate (36) and combusts. The combustion flame becomes a large flame, and the outside air passing around the burner (1) mixes to form hot drying air. (13)
, (l4) to obtain a good combustion flame color.

This hot air flows from the hot air room (18) to Q! 7. By ventilating the drying chamber (17), passing through the exhaust chamber (19), and suctioning and exhausting the air with the exhaust fan (8>), the grains stored in the storage chamber (15) are transferred to this II'? 15) is exposed to this hot air while flowing down inside the drying chamber (I7), and is dried.
) from the grain collection gutter (2o) to the supply gutter (
28) into the grain hoisting machine (25) via a lower transfer spiral, then transported to the upper part by a packet conveyor (26), passed through a dispensing cylinder (27), and then from a transfer gutter (23) to a spreading plate (24).
) is transferred to the upper part of the transfer supply, and this expansion board (2
4), the water is evenly returned to the storage chamber (15), circulated and dried, and the moisture sensor (3l) is adjusted to the moisture setting range (4).
When the grain moisture content that is the same as the finishing target moisture content set by operating 5) is detected, the drying control device (47) of the operating device (6)
The dryer (4) is automatically stopped under automatic control.

During this drying work, the wind indicator control device (3) of the air volume device (32)
), when an abnormal value is input to the rotation speed control input value of the blower motor (2), the rotation speed of the blower motor (2) is fixed at a predetermined rotation speed, and at the same time, the hot air of the burner (L) is i
When the hk degree is controlled to a predetermined temperature low bl;lt degree and combustion is continued for a predetermined time, and an abnormal value is input again after this predetermined time, an alarm is issued from the alarm device (55) and at the same time the burner Combustion in (1) stops.

In addition, the combustion control device (118) compares the set hot air temperature set by operating each temperature setting sensor (44) and the hot air temperature detected by the hot air temperature sensor (21),
When the temperature difference is large as a result of comparison, the rotation speed of the blower motor (2) controlled by the air volume control device (3) is controlled by the CPU (52) /\1 in a short time as set and memorized. Contrary to the above, when the temperature difference is small, the rotation speed of the blower motor (2) is controlled for a long time as set and stored in the CPU (52), As a result, when the amount of change in the amount of fuel supply is large, the amount of change in the amount of combustion air is also large.
By controlling the amount of combustion air in a short period of time, it is possible to ensure an even combustion state and prevent misfires. Also, when the amount of change in the amount of fuel supplied in kg is small,
The amount of change in the combustion air claw is also small, so even if the control time for the amount of air for the combustion engine (6) becomes long, the combustion condition will not deteriorate.

[Brief explanation of drawings]

The figures show an example of the present invention, in which Fig. 1 is a block diagram, Fig. 2 is a flowchart, Fig. 3 is a relationship between fuel supply amount and fan motor rotation speed, and Fig. 4 is a diagram showing the relationship between fuel supply amount and fan motor rotation speed. 5 is an overall side view of the dryer that can be partially cut away, and FIG. 5 is a sectional view taken along line A-A in FIG.
Figure 6 is an enlarged side sectional view of the burner, Figure 7 is an enlarged rear view of the burner, and Figure 8 is a partially cutaway front view of a part of the dryer.
, FIG. 9, and FIG. 10 are diagrams showing other embodiments, in which FIG. 9 is a flowchart diagram, and FIG. 10 is a diagram showing the relationship between time and hot air seed degree. In the figure, code (1) is the burner, (2) is the blower motor, (
3) shows the air volume control device.

Claims (1)

[Claims] Blower motor (2) that supplies combustion air for burner (1)
The burner (1) is controlled to stop by detecting improper control when the fan motor (2) is fixed at a predetermined rotation speed due to improper control of the air volume control device (3) that controls the air volume of the burner (1). Burner control device for grain dryers, etc.