JPH02223851A - Grain circulation detecting device for grain drying machine - Google Patents

Abstract

PURPOSE:To improve the durability and to prevent an erroneous detection by bringing grains to hot air drying, while repeating a circulating transfer extending from a storage chamber of the upper part to a drying chamber of the lower part, and detecting the circulating transfer of the grains, based on a variation of exhaust gas humidity. CONSTITUTION:Hot air generated from a burner 3 of a grain drying machine 6 is brought to ventilation extending from a hot air chamber 14 to a drying chamber 2, passes through an exhaust chamber 16 and sucked and exhausted by an exhauster 10, by which grains contained in the drying machine 6 are exposed to hot air and dried in the course of flowing down in the drying chamber 2 from a storage chamber 1, and supplied into a grain collecting gutter 12 from a transfer-out valve 13. The grains pass through a supply gutter 25 from the grain collecting gutter 12 and transferred and supplied into a grain lifting machine 20, carried to the upper part by a bucket conveyor 21, pass through a throwout cylinder 22 and supplied into a transfer gutter 18, transferred onto a diffusion board 19 from the transfer gutter 18, and diffused and reduced equally into the storage chamber 1. In the course of a drying work, exhaust gas humidity of exhaust gas in the exhaust chamber 16 is detected by an exhaust gas humidity sensor 4, and based on a variation of the detected exhaust gas humidity, a circulating transfer of grains is detected, and the durability is improved and an erroneous detection can be prevented.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a grain circulation detection device for a grain dryer.

Conventional technology In the past, grains were repeatedly transferred from an upper storage chamber to a lower drying chamber, while hot air generated from a burner was passed through the drying chamber to dry them. It was a grain circulation detection device that directly detected with a sensor.

Problems to be Solved by the Invention The grains stored in the upper storage chamber are repeatedly transferred from the storage chamber to the drying chamber and flowed down, while the hot air generated from the burner is passed through the drying chamber. The grains flowing down the drying chamber are exposed to hot air and dried,
The grains being circulated are directly detected by a circulation sensor, and while the circulation of the grains is being detected, it is detected that the grains are circulating normally, and the drying of the grains is continued.

During this drying operation, circulating grains are detected indirectly, or both indirectly and directly, in order to more accurately detect the circulation of grains.

Means for Solving the Problems Regarding the Invention of Claim 1 This invention is directed to a method of repeatedly transferring grains from an upper storage chamber (1) to a lower drying chamber (2) while blowing hot air generated from a burner (3). The exhaust air is ventilated into the drying chamber (2) and dried while being exhausted outside the machine.The exhaust air humidity of this exhaust air is detected and the circulation transfer of grains is detected based on the change in the detected exhaust air humidity. A grain circulation detection device for a grain dryer is characterized in that a humidity sensor (4) is provided.

The grains stored in the storage chamber (1) in the upper part of the invention are stored in this storage chamber (1).
While repeating the permeation transfer from 1) to the drying chamber (2) through the edge, the grains flowing down this drying chamber (2) are transferred to the burner (
3) is exposed to hot air generated from the process and dried.

The hot air during the drying process is passed through the drying room (2) and exhausted to the outside of the machine.The exhaust air humidity sensor (4) detects the exhaust air humidity.
When the amount of change in the detected exhaust air humidity per hour is larger than a predetermined amount, it is detected that the grains are not circulating and the grain drying operation is stopped.

Effects of the Invention According to the present invention, the circulation detection of grains can be performed using an exhaust air humidity sensor (4
) can improve durability compared to sensors that directly detect circulating grains, and eliminate false detections due to malfunctions, ensuring accurate grains. circulation detection.

Means for Solving the Problems Regarding the Invention of Claim 2 In this whole month, the grains are generated from the burner (3) while being repeatedly transferred in circulation from the upper storage chamber (1) to the lower drying chamber (2). Hot air is sent to this drying room (2): aK is performed to dry the exhaust air while being exhausted outside the machine.The exhaust air humidity of this exhaust air is detected, and based on the change in the detected exhaust air humidity, the circulation transfer of grains is detected. A grain circulation detection device for a grain dryer is characterized in that it includes an exhaust air humidity sensor (4) that directly detects the circulation of grains, and a circulation sensor (5) that directly detects the circulation of grains.

The grains stored in the storage chamber (1) in the upper part of the invention are stored in this storage chamber (1).
While repeating the circulation transfer from 1) to the drying chamber (2), the grains flowing down the drying chamber (2) are transferred to the burner (
3) is exposed to hot air generated from the process and dried.

The hot air during the drying process is passed through the drying room (2) and exhausted to the outside of the machine.The exhaust air humidity sensor (4) detects the exhaust air humidity.
If the amount of change per hour in the detected exhaust air humidity is larger than a predetermined amount, it is detected that the grains are not circulating and the grain drying operation is stopped, but the drying operation is stopped again after a predetermined time. When the circulation sensor (5), which directly detects the circulation of the grains, detects the circulation of the grains, it detects that the grains are circulating and continues the drying operation; When circulating grains are not detected, it is detected that the grains are not circulating and the grain drying operation is stopped.

Effects of the Invention According to the present invention, the circulation detection of grains can be performed using an exhaust air humidity sensor (4
), and also direct detection by directly detecting the circulating grains with the circulation sensor (5), thereby preventing erroneous detection due to malfunction. Accurate grain circulation detection can be performed without any problems.

Example On the ward side, (6) is a grain dryer, and the machine wall (7) of this dryer (6) has a rectangular shape that is long in the front and back direction, and consists of front and rear wall plates and left and right wall plates. This dry 4i is on the front wall board! Operating device (8) for starting and stopping (6)
The structure includes an eight-na case (9) containing a burner (3) and an exhaust fan (10) and a motor (10) on the rear wall plate.
11) etc.

In the center of the lower part of the machine wall (7), there is a transfer I in the front and back direction.
l! ! A grain collection gutter (12) equipped with a whirlpool is installed, and a drying chamber (2) formed between the ventilation nets is installed in parallel on the upper side of this grain collection gutter (12) to communicate with each other. is equipped with a feeding valve (13) that feeds out and flows down the grains by rotation, and a hot air chamber (13) is installed between the insides of each of the drying chambers (2).
A hot air temperature sensor (14) is formed in the hot air chamber (14) to communicate with the burner (3).
5), an exhaust chamber (+8) is formed outside each drying chamber (2) and communicated with the exhaust fan (lO),
Inside this exhaust room (16), there are installed an exhaust air temperature sensor (41) and an exhaust air humidity sensor (4) that detect the exhaust air temperature and humidity of the exhaust air passing through this air exhaust room (IB). The motor (11) operates the transfer spiral and each delivery valve (1).
3) and the exhaust fan (10).

A storage chamber (1) is formed on the upper side of each drying chamber (2) and communicated with each other, and a ceiling plate (17) and a transfer gutter (18) equipped with a transfer spiral are provided on the upper side of the storage chamber (1). This transfer gutter (
18) A supply port for supplying the transferred grains into the storage chamber (1) is provided in the center, and a supply port is provided below the supply port for supplying the transferred grains into the storage chamber (1).
) is provided with a diffusion plate (18) that uniformly diffuses and returns the grains into the inside of the container.

Grain hoist fi (20) is provided in the front part of the front wall plate, inside which a packet conveyor (21) belt is stretched between the upper and lower pulleys, and between the upper end and the starting end of the transfer gutter (18). A dispensing tube (22) is provided and communicated with the dispensing tube (22), and a circulation sensor (5) for detecting grains passing through the dispensing tube (22) is provided in the dispensing tube (22). (5) is a rotatably supported actuator (
'13) and a switch (24) that is turned on and off by the rotation of this actuator (23), and when this switch (24) is on, grains pass through the dispensing tube (22). When the switch (24) is turned off, the grains are detected to be circulating in the dispensing tube (24).
22) It is configured to detect that grains are not circulating when they do not pass through the grain collection gutter, and a supply gutter (25) is provided between the lower end and the terminal end of the grain collecting gutter (12) to communicate with each other. It is the composition.

A motor (26) is provided on the upper part of this grain raising m (20), and this motor (2B) operates the packet conveyor (21) belt, the transfer spiral in the transfer gutter (18), and the expansion A [(19) ), etc., and the center part in the vertical direction receives the grains that fall while being conveyed to the upper part by the packet conveyor (21), crushes the grains under pressure, and at the same time crushes the crushed grains. Moisture sensor (27) that detects moisture in grains
).

Said operation bag 5! t(8) is box-shaped, and on the surface plate of this box there are a start switch (28) for starting the dryer (6), and a stop switch (29) for stopping the dryer (6) for each operation of drying and discharging. ), each temperature setting arc (30) in which the temperature of the hot air generated from the burner (3) is set by the operating position n, a moisture setting arc (31) in which the target finishing moisture is set by the operating position, and the moisture sensor. The structure is equipped with a display window (32) and a monitor display that display the grain moisture detected by the hot air temperature sensor (27), the hot air temperature detected by the hot air temperature sensor (15), and the remaining drying time. The configuration includes a device (33) and a combustion control line 2t (34), and each setting arc (30), (31) is a rotary switch type, and a predetermined value is set depending on the operating position. ,ru.

The drying control device (33) includes each of the exhaust air humidity sensors (4).
) and the detection value detected by the moisture sensor (27) is A-
An A-D converter (35) that performs D conversion, an input circuit (to which the converted value converted by this A-D converter (35) is input)
3G), an input circuit (37) in which the detection of the circulation sensor (5) is performed manually; an input circuit (3G) in which the operation of the switches (28), (29) and the moisture setting knob (31) is performed manually; 37) A CPU (3B) that performs arithmetic logic rA calculations and comparison operations on various input values input from these input circuits (36) and (37); upon receiving various commands from this CPU (+8), This configuration includes an output circuit (38) for outputting.

The combustion control device i! '(34) is an A-D converter for converting detected values detected by the hot air temperature sensor (15) and the exhaust air temperature sensor (41);
An input circuit to which the conversion A1 converted by the converter is input, an input circuit to which the temperature setting knobs (30) are operated manually, and various input values input from these input circuits are subjected to arithmetic and logical operations. The CPU (38) performs comparison calculations, etc.
The configuration includes an output circuit that receives various commands from the CPU (38) and outputs them.

The drying control by the drying control device (33) is such that the grain moisture detected by the moisture sensor (27) is the finishing moisture and the turning grain moisture set by operating the moisture setting sprinkler (31). Then, the drying control device (33) automatically controls and automatically stops the dryer (6), and as shown in FIG. In addition, as shown in Fig. 7, a malfunction occurs in the grain circulation system during drying and the grains no longer circulate. When grains are no longer fed, the exhaust air humidity of the exhaust air decreases rapidly by about 7.5% for about 3 minutes, for example, and the exhaust air humidity detected by each of the exhaust air humidity sensors (4) becomes lower than the CPU. (
3B), and if the input exhaust air humidity decreases by 5.5% or more in 3 minutes, the CPU (38) is set and stored to indicate that the grains being dried are not circulating. The drying control device (33) automatically stops the drying IN (6) upon detection of a decrease in exhaust air humidity of 5.5% or more.

The dryer (6), which is stopped and controlled by the exhaust air humidity sensor (4), is set and stored in the CPU (3B). For example, when 2 minutes have elapsed, the dryer (6) is restarted, and when the circulation sensor (5) detects the circulation of grains and this circulation is input to the CPU (38), the burner (3) is reignited and the drying operation is restarted. Also, if circulation is not input, the drying 41 (6) is stopped again by the drying control device 21t (33), and the hot air temperature of this combustion is detected by the hot air temperature sensor (15).
The exhaust air temperature is detected by the exhaust air temperature sensor (41), this detected exhaust air temperature is manually input to the CPU (3B), a temperature gradient is detected, and this temperature gradient and the CPU
The temperature gradient set and stored in (38) is compared,
If it is within the range of ±3 degrees of the setting memory, combustion continues and drying work is performed, and if it is outside the range of ±3 degrees of the setting memory, the burner (3) is extinguished and drying work is performed. This is a configuration in which the drying work can be continued even if a malfunction occurs in any of the exhaust air humidity sensor (4), the exhaust air temperature sensor (41), and the circulation sensor (5).

Combustion control by the combustion control device (34) is performed by comparing the hot air temperature detected by the hot air temperature sensor (15) with the hot air temperature set by operating each of the temperature settings (30), and detecting a difference. When the hot air temperature is set, the number of times the fuel pulp opens and closes is controlled so that the temperature is the same as the set hot air temperature, and the fuel pump (4
In this configuration, the amount of fuel sucked in at step o) and supplied to the spacer (3) is controlled.

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

Thoroughly check each setting of the operating device (8) (30), (31)
By operating the start switch (28) to start the drying operation, each part of the grain dryer (6), the bafuna (3), the moisture sensor (27), etc. will start. Hot air is generated from the burner (3), and this hot air is ventilated from the hot air chamber (10) to the drying chamber (2), passes through the exhaust chamber (16), and is sucked and exhausted by the exhaust fan (10). The grains accommodated in the drying chamber (6) are exposed to this hot air and dried while flowing down from the storage chamber (1) into the drying chamber (2), and then are fed out to the lower part by the feeding valve (13). The grain flows down and is supplied into the grain collection gutter (12), from which the grain is transferred and supplied via the supply gutter (25) into the grain hoist (20) by the lower transfer spiral, and then onto the packet conveyor (21). ) TeJ: is transported to the section and supplied into the transfer gutter (18) through the dispensing tube (22), from this transfer gutter (18) to the diffusion ff1 (+9) by the upper transfer spiral, and this Diffuser (19)
The grain moisture is evenly diffused into the storage chamber (1), circulated and dried, and the moisture sensor (26) adjusts the moisture content of the grains to match the finishing target moisture set by operating the moisture setting knob (31). When detected, the drying control device (33) of the operating device (8) automatically controls and automatically stops the dryer (6).

During this drying work, the exhaust air humidity in the exhaust air chamber (16) is detected by the exhaust air humidity sensor (4), and the detected exhaust air humidity changes significantly from a predetermined value within a predetermined time. Then, it is detected that the grains being dried are not circulating, and the dryer (6) is switched to the drying control bag! (13), the dryer (6) is started again after a predetermined time has elapsed, and when the circulation sensor (5) detects circulating grains, the burner (3) is re-ignited and the drying operation is restarted. If started and no grain circulation is detected, the drying m (6) is stopped again in the drying control bag El (33).

When the re-drying operation is started, the exhaust air temperature is detected by the exhaust air temperature sensor (41), the temperature slope of the detected exhaust air temperature is compared with the temperature slope of the setting memory, and the re-drying operation is started based on the comparison result. The operation may be continued or the burner (3) may be extinguished and the re-drying operation may be stopped.

[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 an overall side view of the dryer that can be partially cut away, and Fig. 4 is Fig. 3. Figure 5 is an enlarged front view of a part of the dryer that can be partially cut away.
FIG. 6 is a relationship diagram between exhaust air humidity and drying time, and FIG. 7 is a relationship diagram between exhaust air temperature and amount of change. In the figure, reference numeral (1) indicates a storage chamber, (2) a drying chamber, (3) a burner, (4) an exhaust air humidity sensor, and (5) a circulation sensor.

Claims (1)

[Claims] 1. Grain is transferred from the upper storage chamber (1) to the lower drying chamber (2).
The hot air generated from the burner (3) is passed through the drying chamber (2) while being repeatedly circulated and transferred to the drying chamber (2), and the exhaust air humidity is detected while being exhausted outside the machine. A grain circulation detection device for a grain dryer, characterized in that it is provided with an exhaust air humidity sensor (4) that detects the circulation transfer of grains based on a change in the amount of grain. 2 The grain is transferred from the upper storage chamber (1) to the lower drying chamber (2).
The hot air generated from the burner (3) is passed through the drying chamber (2) while being repeatedly circulated and transferred to the drying chamber (2), and the exhaust air humidity is detected while being exhausted outside the machine. A grain dryer characterized in that it is provided with an exhaust air humidity sensor (4) that detects the circulating transfer of grains based on a change in the temperature, and a circulation sensor (5) that directly detects the circulating transfer of grains. Grain circulation detection device.