JPS62202931A - Burner flame detecting device - Google Patents

Abstract

PURPOSE:To make it possible to easily discriminate a cause of flame failure and to carry out repair and adjustment in a short period of time by providing a switching device using an ignition portion as a detecting portion and switching it to a switching device to a flame detector for detecting the presence or absence of flame during combustion. CONSTITUTION:When a flame failure occurs during combustion, restarting of the detecting device is carried out to seek for the cause for the failure. However, when the restarting of the device is carried out, the voltage of an igniter 1 is slowly increased, and an ejected fuel is ignited at the igniting portion 2 of the igniter 1. If the voltage at the time of ignition is less than a predetermined value, the clearance at the igniting portion is normal, and the combustion flame is detected, whereupon it is possible to determine that the failure occurs due to causes other than the fault of the igniter 1, such as an excessive quantity of combustion air and the like. When the voltage value at the time of the failure is more than a predetermined value, it is detected that the clearance at the igniting portion 2 of the igniter 1 is extraordinary. Therefore, it is determined to be a flame failure because the combustion flame is not detected.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a flame detection device for a burner, and can be used in a dryer for drying grain.

2. Description of the Related Art Conventionally, a device has been provided with a ceramic heater or an igniter as a device for igniting the ejected fuel, and a separate flame sensor or the like as a device for detecting the combustion flame during combustion.

Problems to be Solved by the Invention When a burner is used in a dryer for drying grain, fuel and combustion air are supplied into the eight chambers of the dryer, and this air is ejected from the combustion section. The jetted fuel is ignited by a ceramic heater, for example, and combustion starts. The combustion flame during combustion is detected by a flame sensor, etc., and the combustion flame is sucked by an exhaust fan installed in the dryer, producing hot air. Therefore, in the burner of the dryer that exposes the grains to hot air to dry them, the flame sensor may break during combustion, or misfire may occur if the amount of combustion air is excessive. When this misfire occurred, it was not possible to distinguish whether the cause of the misfire was the flame sensor or the excessive amount of combustion air, so I spent a long time in repairs and 31st maintenance, but I was unable to distinguish the cause of the misfire. The purpose is to make it easy to carry out repairs, adjustments, etc. in a short period of time.

Means for Solving the Problems This invention provides an igniter (1) for igniting the jetted fuel. Check (2)1
Flame detection device 2 that detects the presence or absence of a burning flame as part 0
1 (3) A burner flame detection device has a configuration including a switching device (4) for switching to (3).

Effect of the Invention Fuel and combustion air are supplied into the chamber, and while being ejected from the combustion section, the fuel is ignited by the ignition section (2) of the igniter (1) to start combustion. When the combustion starts, the switching device (4) switches the ignition part (2) of the igniter (1) to a flame detection device (3) that detects the combustion flame during combustion, and this flame detection device 21 (3)
), the ignition section (2) detects the combustion flame during combustion.

If a misfire occurs during this combustion, a restart is performed to eliminate the cause of the misfire, but when this restart is performed, the pressure of the igniter (1) gradually increases, causing the igniter (1) to The igniter (2) ignites the ejected fuel, and if the voltage at the time of ignition is below a predetermined value, the ignitor (2)
2) Since the gap is normal and a combustion flame is detected, it can be determined that the misfire was caused by a cause other than the igniter (1), such as an excessive amount of combustion air.

If the voltage value when igniting is equal to or higher than a predetermined value, it is detected that the gap between the ignition part (2) of the igniter (1) is abnormal, and this gap abnormality causes the igniter (1) to
Even if the ignition section (2) of ) is replaced with the flame detection device (3), the combustion flame being burned is not detected in this ignition section (2), and as this combustion flame is not detected, a misfire occurs. It can be determined that

Effects of the Invention According to the present invention, the ignition part (2) of the igniter (1) ignites the ejected fuel and detects the combustion flame during combustion after this ignition, so that if the burner misfires during combustion, this Is the misfire caused by too much combustion air?
Alternatively, it is possible to easily determine whether a misfire has occurred due to a gap failure in the ignition part (2) of the igniter (1) and the combustion flame is no longer detected in this ignition part (2). Repairs and adjustments after a burner misfire can be easily carried out in a short time.

Embodiment In the illustrated example, the machine wall (6) of the dryer (5) has a rectangular shape in plan view that is long in the front and rear direction, and is made up of front and rear wall plates and left and right wall plates. is the storage chamber (8),
Drying chambers (9), (9) are provided in the lower part, and this drying chamber (9)
), (9) At the bottom, feeding valves (10), (10) for feeding and flowing down the grains are pivotally supported, and the drying chambers (9), (9)
A collection with a built-in transport spiral on the bottom? Install an I gutter (11),
The front wall board includes a burner case (13) with a built-in burner (12) and a J for starting and stopping the dryer (5).
The configuration includes an operating device 21 (42) for I control,
The rear wall plate has an exhaust air &'1 (14) and a motor (15).
The motor (15) is configured to rotationally drive the transfer spiral, the delivery valves (10), (10), the exhaust fan (5), etc. in the grain collection gutter (11), and the drying Room (9)
(9) Inside is a hot air chamber (18). Q: This hot air chamber (18) is equipped with a temperature sensor (18) that detects the temperature of the hot air inside this hot air chamber (18), and the hot air generated from the burner (12) is sent to the hot air chamber (18). (18) ventilates the drying chamber (9), and the air exhaust machine (14) sucks and discharges the fabric.

On the upper side of the storage W1 chamber (8) there are ceiling plates (1B), (1
B) and a transfer gutter (17) with a built-in transfer spiral are provided, and in the center of this transfer gutter (17), the transferred grains are transferred to this storage chamber (8).
) is provided, and a diffusion plate (7) is provided below the supply port, and this diffusion plate (7) uniformly diffuses and returns the grains into the storage chamber (8). It is the composition.

There is a schiff on the front part of the front wall board. A packet conveyor belt (21) is installed inside the shell a (2G), and a packet conveyor belt (21) is stretched between the lower pulleys, and a dispensing belt is placed between one end and the starting end of the transfer gutter (17). 22) for communication, a supply gutter (23) is provided between the lower end and the terminal end of the grain collecting gutter (11) for communication, and a part of the grain raising machine (20)-1 is connected to one side. A motor (24) is provided, and the motor (20) is configured to rotate the packet conveyor (21) belt, the transfer spiral in the transfer gutter (17), the spreader plate (7), etc.

The burner (12) is provided with a cylindrical blower tube (25) with an open center at the rear for blowing combustion air, and a vaporizing tube (2B) etc. is rotatably driven inside the blower tube (25). A combustion motor (27) is provided at the front of the blast tube (25), and a combustion t,2 (28) with an open center is provided, and this combustion 12
(28) has a conical guide f with an open end.
n (29), and the combustion tube (28) has a nozzle (30) that is open at the center and through which vaporized fuel is ejected and combusted! ! i (31), and also this combustion tube (2B
) An igniter (1) having an ignition part (2) near the outer periphery.
), (1) as the ignition part (2).

(2) It is a structure in which the parts are fixed with a predetermined gap between them.

The shaft end of the motor (27) is provided with a scattering body (3) that receives the fuel supplied from the fuel nozzle (32) and scatters it by rotation.
3) and the vaporization t1 (28) along the guide tube (28) are fixed, and this vaporization t1 (28) is fixed. , 2 (2B) is shaped like a pot, and the edge part is bent toward the outer periphery, and the vaporization plate (30) is fixed to the edge part with a small gap through which fuel can flow out. (30 has a diameter expanded obliquely toward the outside of the old edge side, and is formed into a conical shape in the opposite direction to the carburetor tube (28), and this expanded diameter portion and the inclined side portion of the combustion disk (31) There is an eruption n(1
5) to form this jet (35) and the combustion! (31
) The vaporized fuel is ejected from the ejection hole (30) and combusted.

A blower (3B) is installed on the outer side of the upper plate of the burner case (13).
) and a blower motor (37), and an intake f
I (38) is provided, and the distance between the air blower 4m (3111) and the air blower tube (25) [1 part is the air duct) (
39) are provided and communicated with each other, and by the rotation of the blower motor (37), the blower (38) sucks combustion air from the intake 11 of the intake fi (38), and this blower (3B),
A fuel pump (4G) having a fuel valve is provided on the outer side of the lower plate of the burner case (13), and the fuel pump (4G) is provided with a fuel valve on the outer side of the lower plate of the burner case (13). By opening and closing, this fuel pump (40) sucks the fuel in the fuel tank (41) through the fuel hose, and this fuel pump (40) causes the sucked fuel to be dispersed through the fuel supply pipe and the fuel nozzle (32). 411 is supplied to the outer peripheral surface of the body (33).

The blower motor (37) is a variable speed motor, and the blower motor (37) is operated so that combustion air suitable for the fuel supplied by the fuel pump (40) is blown into the blower (25). 37) and also controls this blower motor (3
7) The rotation can be changed manually.

City record igniter (1), (1) is the said operating device (42)
The power is transmitted so that the voltage gradually increases by 1:, and the ignition parts (2), (2) of the igniters (1), (1) connect the vaporizing tube (2B) and the curved vaporizing disk (34). The igniter (1) is configured to ignite the jetted fuel spouted from a small gap between the igniters (1) and 2.
The ignition part (2) of (1), (2) is a flame detection device (3)
The switching device 2E (4) detects the combustion flame during combustion, and the switching device (4) is a switch having AB contacts, and when the A contact side is connected, the flame detection device (3) detects the burning flame. Is a flame detected when power is sent to the igniter (1) and connected to the B contact side? C position (3), and the flame detection device (3) is configured to detect the combustion flame during combustion.

The operating device (42) has a box shape, and the top plate includes a start switch (43) for starting and stopping the dryer (5), a stop switch (44), and a hot air temperature for setting the hot air temperature. A setting indicator (45), a timer switch (4B) for setting the drying time, a display window (47) for displaying the hot air temperature generated from the burner (12), etc. are provided, and a control device (4B) is installed inside. provided, this control device (48)
are the respective switches (43), (44) and the six sockets (45).
), an input circuit (411) into which the operations of (48) are input.
, the detection point detected by the temperature sensor (19) is A-
An A-D converter (50) that performs D conversion, this A-D converter (
an input circuit (51) into which the converted value converted in step 50) is input;
), a CPU (52) that performs arithmetic and logical operations, comparison operations, etc. on various input values input from these input circuits (49) and (51), and receives various commands from this CPU (52) and outputs them. This i′I# control device (42) controls each motor (
15), (20, (27), and (37)) to start and stop the fuel pump (40),
? It is configured to control the intake amount of the + and this fuel by the I pump (40).

The control device i! t(42) is the igniter (1), (
When the voltage of the predetermined value set and memorized to 1) is transmitted and ignited, the gap between the +iFi ignition parts (2), (2) of this igniter (1), (1) is detected to be normal. ,
When the ignition is ignited, the input signal for this ignition is input to the input circuit (54) and inputted from this input circuit (50 to the CPU (52), and this input activates the switching device (4) to switch the igniter (1). ), (1), the ignition parts (2), (2
) affects the flame detection device (3), this flame detection type 21 (3) detects the combustion flame during combustion, and this detection signal is input to the input circuit (55).
This input is manually input to the CPU (52), and based on this input, it is detected that the burner (12) is burning normally. When a voltage higher than the value is transmitted and ignites, it is detected that the gap between the ignition parts (2), (2) of the igniters (1), (1) is abnormal, and this abnormal state yE is detected as described above. It is configured to display on the display window (47) of the operating device (42).

The control device (48) controls the hot air temperature setting device (45).
When the fuel pump (40) is operated, the fuel valve of the fuel pump (40) opens and closes a predetermined number of times set in the control device (48) and recorded, and the fuel is sucked into the burner (12) by the fuel pump (40). The temperature sensor (19) detects the hot air temperature in the hot air chamber (18), and the detected hot air temperature and the set hot air temperature set by operating the hot air temperature setting knob (45) are set. The structure is such that the temperature of the hot air generated from the burner (12) is controlled to be high or low by comparing the fuel valves and increasing or decreasing the number of times the fuel valve is opened and closed so that they are the same if they are different. , the temperature sensor (19)
The configuration is such that the detected hot air temperature detected by the operator is displayed on the display window (47) of the operating mold 21 (42).

The dryer (5) is started by operating the 6 holes (<5), (4B) of the operating device (42) and the start switch (43), and at the same time the igniter (1) of the burner (12) is turned on. ), (1) ignition parts (2), (2), fuel is sucked from the fuel tank (41) by the fuel pump (4o) by opening and closing the fuel valve, and from this fuel pump (40) the fuel is sent to the fuel nozzle. (32) etc., then the flying object (33
) The fuel is supplied to the outer circumferential surface part, and the fuel is scattered by this scattering body (33) to the inner wall part of the vaporization cylinder (2B), and then the fuel is
While flowing down the inner wall part, it is ejected from the small gap between this vaporizing cylinder (2B) and the vaporizing disc (30), and -1 of this ejected fuel is sent to the igniter (1), the ignition part (2) of (1), (2) and automatically ignites to start combustion, and the combustion air is sucked in from the intake port of the intake cylinder (38), passes through the blower (3B) and the blower duct (39), and enters the blower tube (25). The combustion flame heats the vaporization cylinder (2B), and this vaporization
2 (2B) The fuel 1 flowing down is vaporized, and this vaporized fuel is ejected n (35) and combusted? It burns while ejecting from the nozzle hole (30) of 11 (31) and becomes a combustion flame,
After igniting this combustion flame! , 11 conversion device (4) converts the igniters (2), (2) of the igniters (1), '(1) into a flame detection device (3), and this flame detection device (
3), and while this flame detection device (3) detects a combustion flame, it is determined that the burner (12) is burning normally and continues combustion.

This combustion flame is sucked by the exhaust fan (10), thereby turning into hot air. )
The grains stored in the storage chamber (8) are stored in this storage chamber (8).
The grains are dried by being exposed to this hot air while flowing through the drying chamber (9), and are fed out and flowed down to the lower part by the feeding valve (lO), and then passed through the grain collection gutter (11) by the lower transfer spiral to the supply gutter. (23
), transported to the upper part by the packet conveyor (21) and supplied into the transfer gutter (!7), and diffused through this transfer gutter (17) by being transferred in this transfer gutter (17). ' + (7) and is evenly diffused and returned into the storage chamber (8) by this diffusion fi (7), and is circulated and dried for the set time set by the timer hole (4B). Then, when the grain reaches a predetermined moisture value, the operation type 71 (42)
The dryer (5) is automatically stopped under automatic control by the control device (48).

If the burner (12) misfires during this drying, it is re-ignited and if the voltage transmitted to the Eve knives (1), (1) ignites at a predetermined value or higher, then the flame detection device (3)
), it is detected that the burner (12) has misfired due to an abnormality in the gap between the ignition parts (2), (2), and if the burner (12) is ignited below a predetermined value, it is detected that the burner (12) has misfired due to an excessive amount of combustion air blown by the blower (36). A misfire is detected. As a result, the cause of the misfire is repaired and adjusted, the ignition is started again, and the burner (12) continues to burn to dry the grains.

The ignition part (2) of the Eve knife (1), (1), (
2) with the above νJ replacement fi! t (4), the flame detection device (3) detects the combustion flame during combustion.
), it is possible to detect one ignition and a burning combustion flame,
When detecting this combustion flame, the ignition parts (2), (2)
Since detection is not performed unless the gap is in a normal state, if the burner (12) misfires during combustion, it can be determined that the cause is an excessive amount of combustion air being blown into the burner (12), so repair and adjustment are required. etc. become easier.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a block diagram, Fig. 2 is a flowchart, Fig. 3 is an enlarged side sectional view of the burner, Fig. 4 is an enlarged rear view of the burner, and Fig. 4 is an enlarged rear view of the burner. FIG. 5 is an overall front view of the dryer, partially cut away, and FIG. 6 is a side view of the dryer, partially cut away. FIG. 7 is an enlarged front view of a portion of the dryer. In the figure, code (1) is Eve knife, (2) is ignition part, (3
) indicates a flame detection device, and (4) indicates a switching device. Poetry Applicant Name Iseki Agricultural Machinery Co., Ltd. Representative Takashi Iseki Figure 2 Figure 4

Claims (1)

[Claims] An igniter (1) for igniting the ejected fuel is provided with a switching device (4) for switching the igniter (2) of the igniter (1) to a flame detection device (3) for detecting the presence or absence of a burning flame as a detection section. Flame detection device for burners.