JPH0648133B2 - Abnormality detection device for grain dryer - Google Patents

Description

TECHNICAL FIELD The present invention relates to an abnormality detection device for a grain dryer.

Conventional technology Conventionally, the fan motor is rotated by the rotation of the fan motor to create airflow, and this airflow passes through the burner section, and this airflow detection sensor detects the airflow detection sensor. It was a device that detects that an abnormality has occurred in the blower when the air volume is no longer detected.

DISCLOSURE OF THE INVENTION Problems to be Solved In a dryer for drying grains, a fan provided in a rear part is driven to rotate by the rotation of a fan motor. By generating the hot air generated and the outside air from the burner,
This hot air and this outside air mix to become hot air for drying,
The hot air for drying passes through the drying chamber, and the grains flowing down in the drying chamber are exposed to the hot air for drying to be dried, but during the drying operation, the amount of the outside air passing through the burner part is increased. When the detection sensor detects that the outside air flow passing by the air volume detection sensor is no longer detected, it is determined that an abnormality has occurred in the blower, and the dryer is automatically stopped. For example, disconnection of the fan motor circuit, damage to the belt spanned to rotate the fan by the fan motor, clogging of dust or the like in the suction air passage sucked by the fan, or There is a cause such as deformation of the wind duct, but it is unclear which of these locations the abnormality was detected by the air volume detection sensor, so it takes time to find out which location the abnormality occurred. It takes a long time to repair the abnormal part. A long period of time we needed to.

Means for Solving Problems The present invention detects the amount of air passing through a burner (3) part by rotating and driving a fan (2) by rotating a fan motor (1). And a current transformer (5) that detects the current value of the fan motor (1), and the airflow detection sensor (4) no longer detects the passing airflow. Occasionally, depending on the detected current value detected by the current transformer (5), the fan (2)
An abnormality detection control device for individually detecting an abnormality occurrence point is provided, and an abnormality detection device for a grain dryer is provided with a display device for individually displaying the abnormality detection point.

Action of the Invention A blower (2) provided at the rear of the dryer is rotationally driven by a blower motor (1), and the rotary drive of the blower (2) causes a burner (3) provided at the front of the dryer. The generated hot air and the outside air from the burner (3) are sucked in, the hot air and the outside air are mixed to form a hot air for drying, and the hot air for drying passes through the drying chamber and is dried. The grain flowing down in the room is exposed to the hot air for drying and dried. During this drying operation, the outside air passing through the burner (3) is detected by the air volume detection sensor (4). When the detection sensor (4) stops detecting the outside air, it detects that an abnormality has occurred in the blower (2) and automatically stops the dryer. At this time, the blower motor (1) The current value is detected by the current transformer (5), and the controller detects the current value by the detected current value. (2) individually detects, for example, the cause of the abnormality in which the outside air is not sucked, whether the circuit of the fan motor (1) is broken, the belt is damaged, or the suction air passage is clogged. The detected error occurrence location is displayed on the display device.

Effects of the Invention According to the present invention, the outside air flow passing through the burner (3) portion
When the air volume detection sensor (4) detects and the air volume detection sensor (4) no longer detects the outside air wind passing through the burner (3), the air blower (2) sucks the outside air wind. Since the detected abnormal points are individually displayed at the same time as the lost abnormal points are individually displayed, the abnormal point of the blower (2) can be easily repaired, and the abnormal point can be repaired in a short time. it can.

Embodiment In the illustrated example, the machine wall (7) of the dryer (6) has a rectangular shape in plan view that is long in the front-rear direction, and is composed of front and rear wall plates and left and right wall plates. An operating device (8) for starting and stopping (6) is detachably attached.

A grain collecting gutter (9) provided with a transfer spiral for transporting the grain by rotational driving is provided between the center of the lower part of the machine wall (7) and the front and rear direction. A drying chamber (10), (10) is provided in the vertical direction on the upper side of the gutter (9) to communicate with each other, and a feeding valve (11) for feeding and flowing down the grains is provided under the drying chambers (10), (10), (11) is rotatably supported.

A hot air chamber (12) is formed inside the drying chambers (10) and (10) to communicate with a burner (3) built in a box-shaped burner case (13) provided on the front wall plate portion. The drying chamber (1
0), (10) Exhaust chambers (14), (14) between the outside and the left and right wall plates
Is formed to communicate with the blower (2) provided on the rear wall plate portion, and the hot air chamber (12) and the exhaust chamber (14), (1
4) An inclined plate is provided on the upper side, and a partition plate is provided on the lower side.
A hot air temperature detection sensor (15) for detecting the hot air temperature in the hot air chamber (12) is provided in the (12), and a motor (1
6) and a fan motor (1) are provided, and the transfer spiral and the feeding valves (11), (1) in the grain collecting trough (9) are provided by the motor (16).
1) is rotationally driven, and a belt (26) is stretched over a pulley fixed to the fan motor (1) and the fan (2) to rotationally drive the fan (2). And
(27) is a wind duct.

A fuel tank (17) is installed in the front part of the drying chamber (6), and a fuel pump (18) is installed outside the lower plate of the burner case (13),
The fuel pump (18) sucks fuel from the fuel tank (17) through the fuel hose (19), and the fuel pump (18) injects the fuel into the burner (3) through the fuel supply pipe (20). Further, the combustion air is supplied to the burner case (13) by rotating the blower (21) provided on the outer side of the upper plate of the burner case (13) by the blower motor (22) and passing through the blower duct (23). (3) The air flow detection sensor (4) is provided so as to blow air into the burner case (13) from the inner side of the upper plate of the burner case (13). When the outside air is sucked and passes through the burner (3) by the rotation drive of the fan (2), the switch (24) is turned on by the detection plate (25). When the switch (24) is pushed in this way, it is detected that the blower (2) is sucking the outside air from the burner (3). If the switch (24) is no longer pressed by the detection plate (25), the blower (2) does not suck the outside air from the burner (3). It is a configuration to detect.

A storage chamber (28) is formed on the upper side of the drying chambers (10) and (10), ceiling plates (29) and (29) are provided on the upper side of the storage chamber (28), and the ceiling plate (29), A transfer gutter (30) provided with a transfer spiral for transferring grains by rotation along (29) is provided, and this transfer gutter (3
0) A supply port for supplying the transfer grains into the storage chamber (28) is provided in the central part, and a diffusion plate (31) is provided below the supply port.
This diffusion plate (31) is configured to evenly diffuse and reduce the grains into the storage chamber (28).

The front wall plate front part is equipped with a grain raising machine (32), and a bucket conveyor (33) belt is stretched between the upper and lower pulleys inside, and between the upper end and the transfer gutter (30) starting end. Is provided with a throw-out tube (34) for communication, and a supply gutter (35) is provided between the lower end and the end of the grain collecting gutter (9) for communication with the upper part of the grain raising machine (32). A motor (36) is provided on the side, and the motor (36) rotationally drives the bucket conveyor (33) belt, the transfer spiral in the transfer gutter (30), and the diffusion plate (31).

The operation device (8) has a box shape, and a start switch (37), a stop switch (38), a hot air temperature setting knob (39), a timer knob (40) and a display device (41) are provided on the surface. , A configuration in which a control device (42) is provided inside, and the control device (42) operates the switches (37), (38) and the setting knobs (39), (40), An input circuit (43) to which the detection state of the air volume detection sensor (4) is input, an AD converter (44) for AD converting the detection value detected by the hot air temperature detection sensor (15), and this A- D
Input circuit (4) to which the converted value converted by the converter (44) is input
3), CPU (45) for performing arithmetic logic operation and comparison operation of various input values input from these input circuits (43), (43) and receiving various commands instructed by this CPU (45) and outputting them This control device (42) is provided with an output circuit (46).
Is configured to control starting and stopping of the motors (1), (16), (22), (36) and the fuel pump (18).
The fan motor (1) is configured to rotate when the magnet switch (47) is turned on, and a current transformer (5) for detecting the current value of the fan motor (1).

When the blower (2) no longer sucks the outside air, the control device (42) stops the dryer (6) by detecting that the air volume detection sensor (4) has run out of air volume, At this time, the current value of the fan motor (1) is detected by the current transformer (5), and the detected value is the AD converter (44).
To the input circuit (43), the converted value is input to the input circuit (43), and the input value input from the input circuit (43) is input to the CPU (45). For example, when there is no current value, it is detected that the circuit of the fan motor (1) is broken, and a command of the output circuit (46) causes the display device (41) to display the fan motor ( It is indicated that the circuit of 1) is broken, and when the no-load current value is present, it is detected that the belt (26) that rotationally drives the fan (2) is damaged, and the belt (26) is displayed on the display device (42). 26) indicates that it has been damaged, and when the full load current value is reached, it is detected that dust has clogged the air exhaust chamber (14) or the wind duct (27) has deformed, and the display device ( In 42), the suction air passage is indicated as clogging deformation.

The control device (42) controls the hot air temperature in the hot air chamber (12) to be the same as the set hot air temperature set by operating the hot air temperature setting knob (39). ), The detected hot air temperature is compared with the set hot air temperature, and if there is a difference, the fuel pump (18) is controlled so that the fuel pump (18) supplies the hot air into the burner (3). The configuration is such that the fuel flow rate to be changed is controlled.

By operating the setting knobs (39) and (40) of the operating device (8) and operating the start switch (37), the dryer (6) is started, and at the same time, it is provided on the front wall plate portion. Hot air is generated from the burner (3) and the hot air and the outside air from the burner (3) are sucked by the fan (2) by the rotational drive of the fan (2) provided at the rear part for drying. It becomes hot air, and this hot air for drying passes through the drying chamber (10) from the hot air chamber (12), is sucked and exhausted by the blower (2) through the air exhaust chamber (14), and is discharged from the dryer (6). The grains contained in the storage chamber (28) are exposed to the hot air for drying while flowing down from the storage chamber (28) in the drying chamber (10) and dried, and then moved downward by the feeding valve (11). It is delivered to the inside of the supply gutter (35) through the grain collecting gutter (9) by the transfer spiral of the lower part, is transported to the upper part by the grain raising machine (32) and is supplied into the transfer gutter (30), The transfer spiral in this transfer gutter (30) It is transferred and supplied onto the diffusion plate (31) through the transfer gutter (30), and is uniformly diffused and reduced into the storage chamber (28) by the diffusion plate (31), circulated and dried, and the timer picking (40) When the set time set in step 4 has elapsed, the controller (42) of the operating device (8) automatically controls and the dryer (6) is automatically stopped.

During this drying operation, the air amount detection sensor (4) detects the outside air flow passing through the burner (3) sucked by the blower (2), and the air amount detection sensor (4) detects the passage of the outside air flow. When it is no longer detected, it is detected that an abnormality has occurred in the blower (2), the dryer (6) is automatically stopped, and at the same time, the winder motor (1) for rotating the blower (2) is driven. An electric current value is detected by a current transformer (5), and a detected abnormal value of the fan (2) is individually detected based on the detected electric current value, and the detected individually detected abnormal point is the operating device (8). Is displayed on the display device (42).

Even if an abnormality occurs in the blower (2), the location of the abnormality is individually detected and the detected location detected is displayed on the display device (42). It can be repaired quickly and can be repaired in a short time.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a block diagram, FIG. 2 is a partially sectional front view, FIG. 3 is a partially enlarged front view of a dryer, and FIG. FIG. 5 is a side view with a partial cross section, and FIG. 5 is a rear view. In the figure, reference numeral (1) is a fan motor, (2) is a fan,
(3) shows a burner, (4) shows an air flow detection sensor, and (5) shows a current transformer.

Claims (1)

[Claims] 1. An air volume detection sensor (4) for detecting the volume of air passing through a burner (3) by the rotation of a fan motor (1) to rotationally drive a fan (2) to generate air. And a current transformer (5) for detecting the current value of the fan motor (1), and when the airflow detection sensor (4) no longer detects the passing airflow, the current transformer (5) According to the detected current value detected in 5), the blower (2)
An abnormality detection device for a grain dryer, which is provided with an abnormality detection control device for individually detecting the abnormality occurrence points and a display device for individually displaying the abnormality detection points.