JPH04136492U - Circulating grain dryer discharge valve control device - Google Patents

Abstract

(57) [Summary] [Purpose] To automatically adjust the discharge valve time in areas where the power supply frequency is different. [Structure] A frequency detector interposed in the power supply and a control device that determines the frequency of the power supply based on the detection signal from the frequency detector and, based on this determination, determines the operating time of the power supply switch connected to the discharge valve drive motor. It consists of

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea automatically switches the valve operating time even in areas with different frequencies. This invention relates to a discharge valve control device for a circulating grain dryer that can be used in a circulating grain dryer.

0002

[Conventional technology]

A circulating grain dryer consists of a storage section and a grain collecting section, and the grain collecting section is used to store grains via a grain lifting machine. I have contacted Tomabe. Then, a discharge valve installed below the drying section allows the The dried grain is intermittently supplied to the grain collecting section, where it is fed into the grain lifting machine and is circulated until a predetermined moisture content is reached.

0003

[Problem that the idea aims to solve]

In the conventional circulating grain dryer as mentioned above, the power frequency (50Hz, 60Hz) Depending on the region, a sprocket attached to the shaft of the exhaust valve drive motor may be used. It was used by replacing the pulleys and pulleys. In other words, circulating grain drying produced in the 60Hz region In dryers, a 60Hz sprocket or pulley is usually attached to the discharge valve drive motor. It is written. If you use this in a 60Hz area, you can leave it as is, but if you use it in a 50Hz area, If so, you will need to replace the sprocket or pulley with a 50Hz sprocket or pulley. if, If you use the sprocket or pulley for 60Hz as is, the rotation speed of the discharge valve will decrease. Even a little, the amount of grain circulating will decrease, and drying will be significantly delayed. Also, if the When using a circulating grain dryer at 60Hz, use a sprocket or sprocket for 50Hz. If the machine is used as it is, the rotation speed of the discharge valve will increase and the amount of grain circulating will also increase. , it dries too quickly and becomes over-dry. However, in the 50Hz area or 60Hz Replacing sprockets and pulleys depending on the Hz region is troublesome, and The drawback was that the assembly time of the circulating dryer was long.

0004 This invention eliminates the drawbacks of the conventional device as mentioned above, and can be used in either 50Hz or 60Hz areas. The circulation system eliminates the need to replace the sprocket or pulley of the exhaust valve drive motor. An object of the present invention is to provide a discharge valve control device for a circular grain dryer.

[0005]

[Means to solve the problem]

A circulating grain process is formed by the storage section, the drying section, the grain collection section, and the grain lifting machine, and the In a circulating grain dryer equipped with a discharge valve on one side, the electricity of the circulating grain dryer is A frequency detector interposed in the power source and a detection signal from the frequency detector detect the power of the power source. The frequency is determined, and the frequency is determined and connected to the drive motor of the discharge valve. Circulating grain dryer formed by a control device that determines the operating time of a connected electromagnetic switch. discharge valve control device.

[0006]

[Effect]

The detection signal from the frequency detector interposed in the power supply is input to the control device, and the control device The frequency of the power supply is determined at . The operating time of the electromagnetic switch is determined by this judgment. Then, the discharge valve drive motor is operated for a predetermined period of time.

[0007]

【Example】

The present invention will be explained with reference to embodiments. Figure 1 is a circuit diagram of the discharge valve control device. , Figure 2 is an enlarged view showing the drive part of the circulating grain dryer, and Figure 3 is the part of the circulating grain dryer. FIG.

[0008] 1 is a circulating grain dryer with a conditioning chamber 2 in the upper part and a ventilation drying part 3 in the lower part. A grain lifting machine 4 is installed upright on one side of the grain lifting machine 4 to form a circulating grain drying process. Ventilation drying In the drying section 3, a drying chamber 5 formed of a porous wall plate, a hot air chamber 6, and a discharge chamber 7 are arranged side by side. The upper part of the drying chamber 5 is communicated with the tempering chamber 2. The lower part of the drying chamber 5 is connected to the grain flow path 8, A discharge valve 9 is provided at the discharge port. 10 is a grain collection gutter, and the lower part is conveyed at the bottom of the gutter. A grain conveyor 11 is provided, and the lower conveyor 11 passes through the grain lifting machine 4, the upper conveyor 12, and the scattering plate 13. and is in contact with Temperature Room 2.

[0009] A belt 16 with a large number of buckets 15 attached is installed inside the conveyor case 14 of the grain lifting machine 4. It is wound between the upper and lower pulleys 17, and the opening 18 at the upper end of the grain lifting machine 4 has a drainage gutter 19. It is connected to the upper conveyor 12 via the upper conveyor 12.

0010 A plan for collecting grain returned from the bucket 15 between the belts 16 and 16 of the grain lifting machine 4 The inner plate 37 is provided to be inclined, and the guide plate 37 is connected to the moisture measuring device 21 through the supply cylinder 20. The moisture measuring device 21 is connected to the conveyor case via the discharge gutter 22 and return gutter 23. 14 to a lower opening (not shown).

[0011] 24 is a discharge valve drive device (see Fig. 2), which is attached to the shaft of the discharge valves 9, 9. The attached sprockets 25, 25 and the sprocket attached to the discharge valve drive motor 26 A chain 29 is wound around the rocket 27 and the tension sprocket 28. Next Next, the control circuit for the discharge valve 9 will be explained with reference to FIG. Frequency detection on power supply 30 As a device, a photocoupler 33 consisting of a light emitting diode 31 and a photodetecting element 32 is used. The photocoupler 33 controls the discharge valve drive motor 26 via the CPU 34. It is connected to an electromagnetic switch 35, and 36 is a power source.

0012 Next, the operation of the above configuration will be explained. Grain fed into hopper (not shown) (For example, paddy) is transported by a grain lifting machine 4, passes through an upper conveyor 12, and then passes through a scattering plate 13. The particles are evenly scattered and deposited in the tempering chamber 2. Next, a fire heat generator (not shown) and When the exhaust fan (not shown) is activated and the exhaust valve 9 is rotated, the grains in the conditioning chamber 2 are removed. The material flows down inside the drying chamber 5. The grain flowing down inside the drying chamber 54 is discharged from the hot air chamber 6. High-temperature drying is carried out by the drying air flowing horizontally into the chamber 7, and the drying air is sent from the exhaust chamber 7 to the Exhausted from the machine by the exhaust fan. Grain dried by hot air is used as a grain flow path. 8 and is intermittently discharged by a discharge valve 9. The discharged grains are collected It flows down the gutter 10, is sent to the grain lifting machine 12 by the lower conveyor 11, and is thrown into the tempering chamber 2 again. and is circulated and dried until the moisture measuring device 21 detects a predetermined moisture content.

[0013] The grains lifted by the grain lifting machine 4 are subject to vibration during transportation and discharge into the downflow gutter 19. Therefore, it spills from the bucket 15 between both belts 16, 16. spilled grain The material is collected on the guide plate 19 and flows down the supply tube 20 from the guide plate 37 to the moisture measuring device. The moisture content of the grain is measured. For grains that have been tested for moisture, use a moisture measuring device. 21 and flows down the discharge gutter 22, and from the return gutter 23 to the conveyor case 14. Supplied at the bottom.

[0014] Next, the operation of the exhaust valve control device will be explained. Photocap interposed in power supply 30 The light detection element 32 detects the operation of the light emitting diode 31 of the laser 33, and the detection signal is It is input to the CPU 34. The CPU 34 determines the frequency of the power supply 30 in comparison with the reference value. The ON time of the electromagnetic switch 36 is determined based on the determination, and the ON time of the electromagnetic switch 36 is determined. The lube drive motor 26 is operated for a predetermined period of time (for example, 30 seconds per minute). In other words , if the reference value of the CPU 34 is set to 60Hz, the circulating grain dryer 1 is set to 50Hz. When used in the area, the operating time of the discharge valve drive motor 26 is 1.2 times the standard time. So that the ON time of the electromagnetic switch 36 in the CPU 34 is 1.2 of the reference time. Determined twice. In addition, if the power supply 30 is 60Hz, the ON time of the electromagnetic switch 36 The operating time of the discharge valve driving motor 26 is the reference time, and the CPU 34 When using in a 60Hz area with the standard value of 50Hz, the ON time of the electromagnetic switch 46 The operating time of the discharge valve drive motor 26 is determined to be 5/6 times the reference time. Ru.

[0015] Note that the frequency detector is not limited to the photocoupler of this embodiment, and the frequency detector is not limited to the photocoupler of this embodiment. Count the 60Hz voltage fluctuation as the number of pulses and calculate the total number of pulses and time in a certain period of time. Anything that calculates from the interval can be used.

[0016]

[Effect of the idea]

According to the discharge valve control device of the circulating grain dryer in the present invention, the frequency detection The control device determines the frequency of the power supply based on the detection signal from the The operation time of the electromagnetic switch connected to the discharge valve drive motor is determined by the judgment of With this configuration, the discharge valve can be automatically operated even in areas where the power supply frequency is different. The circulation time can be adjusted to keep the amount of grain circulating at a constant level. Also, 50 Depending on whether the region is Hz or 60Hz, it is attached to the shaft of the discharge valve drive motor. There is no need to replace sprockets or pulleys, reducing assembly time for circulating grain dryers. It can be significantly shortened.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of a discharge valve control device.

FIG. 2 is an enlarged view showing the drive section of the circulating grain dryer.

FIG. 3 is a partial front cross-sectional view of the circulating grain dryer.

[Explanation of symbols]

1 Circulating grain dryer 2 Conditioning chamber 3 Ventilation drying section 4 Grain frying machine 5 Drying room 6 Hot air room 7 Ventilation room 8 Grain flow path 9 Discharge valve 10 Grain harvesting trough 11 Lower conveyor 12 Upper conveyor 13 Scatter disk 14 Conveyor case 15 Bucket 16 Belt 17 Pulley 18 Aperture 19 Downstream gutter 20 Supply cylinder 21 Moisture measuring device 22 Discharge gutter 23 Return gutter 24 Discharge valve drive device 25 Sprocket 26 Discharge valve drive motor 27 Sprocket 28 Tension sprocket 29 chain 30 Power supply 31 Light emitting diode 32 Photodetection element 33 Photocoupler 34 CPUs 35 Electromagnetic switch 36 Power supply 37 Information board

Claims (1)

[Scope of utility model registration request] 1. A circulating grain dryer in which a storage section, a drying section, a grain collecting section, and a grain lifting machine form a circulating grain process, and a discharge valve is provided below the drying section, wherein the circulating grain drying A frequency detector interposed in the power supply of the machine and a detection signal from the frequency detector determine the frequency of the power supply, and based on the determination, the operating time of the electromagnetic switch connected to the drive motor of the discharge valve. A discharge valve control device for a circulating grain dryer, characterized in that it consists of a control device for determining.