JPS5823547B2 - Circulating grain dryer - Google Patents

Description

[Detailed description of the invention] The present invention relates to a grain drying device.

The present invention provides a circulating grain drying device for drying rice (paddy rice).
This allows drying of barley and wheat husks (barley) to be carried out at temperatures suitable for each.

In addition, it is possible to switch between rice grain drying and wheat husk drying using a simple rod.

There are two types of down-flow circulation grain drying equipment.

One is a circulation type drying device that uses hot air at a temperature of 35°C or less.
Circulate once again to finish drying.

(Author: Kanto Raiyu Agricultural Experiment Station, Agricultural Equipment Department, Tetsu Watanabe, 4th edition, published by Shinnorinsha [See how to use a ventilation dryer).

In the past, all of them had the above configuration, but recently they are hardly manufactured.

The other type is a type in which a flow-down type drying chamber is provided at the bottom of the flow-down type humidity control tank and is connected to the tank, and a circulation elevator is installed at a side position to reach the humidity control tank from the drying room. The temperature of the hot air in the drying room is as high as approximately 50°C, and the epidermis is mainly dried in the drying room, which is then piled up and returned to the humidity control tank, where it is heated for about 1 to 2 hours. Let it flow slowly; during this time, the dry epidermis will cause
Drying is completed by absorbing the moisture inside and repeating this process about 5 times (circulating 5 times).Currently, most of this type of circulating grain dryer is manufactured and sold. .

(Refer to Japanese Patent Publication No. 50-119461).

The present invention is also an improvement on the latter drying device.

The latter drying device is 1. When drying the rice grains, hot air at a temperature of about 50°C is used to dry the outer skin of the rice grains quickly.

However, it is not a good idea to always use the high temperature hot air.

On days when the outside temperature is quite high, the temperature of the rice grains also rises considerably, so if you apply high-temperature hot air to the rice grains, there is a risk that they will dry out too much and cause cracking.

Furthermore, on days when the outside temperature is abnormally low, even the above-mentioned high-temperature hot air does not dry the air easily, so it is necessary to set the temperature even higher.

Furthermore, a humidity control tank that can accommodate a predetermined amount of rice grains is designed to circulate at a scheduled time when the predetermined amount is reached, so if it is only filled with half the amount, it will be halved. The humidity control time is shortened.

Therefore, before the grain temperature has sufficiently decreased, the rice is exposed to hot air again and the rice temperature gradually becomes too high.

Therefore, when drying rice grains, it is necessary to provide an automatic control device that controls both the outside air temperature and the amount of rice to be poured, and to configure the system to dry the rice grains with appropriate hot air.

Therefore, the drying device is capable of drying not only rice grains but also wheat husks.

However, wheat husks do not have to worry about cracking like rice grains do.

did. In the past, drying of wheat husks only needs to be carried out at a temperature that corresponds to the amount of wheat husks packed in, and there is no need for automatic control based on outside temperature.

To explain with a diagram, reference numeral 1 denotes a flowing-down type grain humidity control tank, which is a large tank with a rectangular cavity, and is formed in a size that can accommodate a large amount of grain (approximately 5 to 40 grains).

A downstream drying chamber 2 communicating with the tank 1 is formed in the lower part of the downstream grain humidity control tank 1.

The down-flow drying chamber 2 applies hot air horizontally and horizontally to the vertically flowing grains to dry the grain skin, and is equipped with a furnace 4 equipped with an air blower 3 (or an air suction device →). Attach the hot air generator 5 having the following.

The grains discharged from the drying chamber 2 are raised by a circulation elevator 6 provided on the side and are returned to the humidity control tank 1.

The furnace 4 is connected to a fuel tank 7 via a main fuel control valve MV, a fuel pump SP, etc., and the main fuel control valve MY is controlled by an outside temperature detector 8 (FIG. 5). Form it like this.

FIG. 5 is an example of controlling the hot air temperature based on both the outside temperature and the amount of rice drying.

In addition to the outside temperature detector 8, the one shown in FIG. The main fuel control pulse J/MV is controlled by the operation of the main fuel control pulse J/MV.

To explain Fig. 5, T1 is a timer from fuel stop to motor stop, M is a motor relay, A is an interlocking relay from the motor timer TM to the timer T□, HV is an ignition fuel valve T2 is an ignition fuel supply A timer for time control, H is a relay for the ignition heater, P is a relay for the fuel pump SP, and VR is a volume for setting the flow rate.

Therefore, in the case of drying wheat husks, the outside temperature sensor shown in FIG. It is something.

In the system shown in FIG. 6, a hot air control circuit for drying rice grains and a hot air control circuit for drying wheat husks are installed side by side, and a manual switching device 10 is attached thereto to enable switching operations.

What is shown in FIG. 8 is a staking switch 11. A window is provided on the side of the humidity control tank 1, and the amount of staking is known from the window. The setting switch 11 is set to the 16-koku index.

Since the present invention has the above-mentioned configuration, when drying rice, the switching device 10 is manually switched to the rice grain side, and when the unhulled rice is stored in the humidity control tank 1 using the elevator 6, the amount of stored rice is detected by the detector 9. Also, the temperature at that time is detected by an outside temperature detector 8, and controlled by an automatic control circuit to automatically control the main fuel control valve MV.

(In addition, when using the hook-up switch 11 instead of the detector 9, check the capacity with the naked eye and then align the switch 11 with the indicator of the amount. (The main fuel control valve MV is controlled by a device that controls the main fuel control valve MV by issuing a signal of the index position.)

Therefore, when the amount filled (accommodated amount) in the humidity control tank 1 is sufficiently large, the detector 9 sends a signal to the main fuel control valve MY to send a large amount of oil, and a considerably high temperature hot air is sent to the main fuel control valve MY. A hot air generator 5 provides high-temperature hot air to the grains.

When this happens, the skin of the unhulled rice will be sufficiently dry, but the elevator 6
When they are piled up in the humidity control tank 1, the storage capacity is sufficiently large, so they are stored for a long time and flow down, and when they flow into the drying chamber 2 again, they return to the state before drying, so they can be dried smoothly.

Furthermore, when the amount of oil stored in the humidity control tank 1 is small, the flow time in the humidity control tank 1 becomes short, so the detector 9 sends a signal to the main fuel control valve MV to send a small amount of oil. This is what you take out and adjust it.

Furthermore, when the outside temperature is high, the grain temperature itself is also considerably high, so even if low-temperature hot air is applied, the grain temperature will be sufficiently raised.

Therefore, depending on the outside temperature detected by the detector 8, when the outside temperature is high, the amount of oil is decreased as the outside temperature increases, and when the outside temperature is low, the hot air temperature is increased as the outside temperature becomes lower. This prevents over-drying or under-drying.

When drying wheat husks, if the switching device 10 is manually switched to the wheat husk side, the drying is controlled only by the amount of husks and drying is performed according to the amount of husks.

Figure 6 A, O, and C are configuration diagrams of a computer that controls the main fuel control valve MV using an outside temperature sensor and a filling amount detector; Figure 6 A is a standard configuration diagram; Figure 6C is a configuration diagram with a constant pressure fixed path, and Figure 6C is a configuration diagram with a memory circuit and a buzzer circuit.
It is a very normal computer circuit, except that it controls the .

Drying equipment equipped with a humidity control tank had the feature of being able to dry not only rice but also wheat husks, but conventionally, rice was dried by feeding rice into sheep, or by simply feeding wheat husks. It was used to dry wheat husks.

However, in the present invention, a flow-down grain drying chamber 2 is formed in the lower part of the flow-down grain humidity control tank 1 and communicates with the tank 1, and the grain discharged from the drying chamber 2 is stored in the side position. A drying room hot air generator 5 is attached to a circulation type grain drying device equipped with an elevator 6 for top-loading and returning rice in a humidity control tank 1.The hot air generator 5 is connected to an outside air temperature detector 8 and an outside air temperature sensor 8 when drying rice. When the wheat husks are drying, the outside air temperature sensor 8 is not activated and automatic control is performed only by the filling amount detector 9, and The switching between the two drying modes is performed using a manual switching device 10.
Since the circulating grain drying device is designed to allow drying of rice grains, rice can be dried at an appropriate external temperature without causing shell cracking, and when drying wheat husks, it can be dried without worrying about shell cracking. It has the feature that it can be dried, and that switching between both drying modes can be carried out at low cost because it has a manual switching structure.

[Brief explanation of drawings]

Fig. 1 is a side view, Fig. 2 is a longitudinal front view, Fig. 3 is a cross-sectional view of the drying chamber, Fig. 4 is a partially sectional side view of the hot air supply device, Fig. 5 is a control circuit diagram, Fig. 6 Figure 7 is a front view of the manual switching device, and Figure 8 is a front view of the manual tension switch. Explanation of symbols 1... Downflow type grain humidity control tank, 2...
Downstream drying room, 3...Blower, 4...Furnace, 5.
... Hot air generator, 6... Circulation elevator, T... Fuel tank, 8... Outside temperature detector, 9... Filling amount detector, 10... Rice. Grain/husk switching device, 11... tensioning switch, MY/
・・Main fuel control valve, SP・Fuel pump, T1・
...Timer, T2...Timer for controlling ignition fuel supply time, M...Relay for motor, A...Motor relay, TM...Timer for motor, HV...Timer for ignition fuel, H. ...Relay for ignition heater, P...
Fuel pump relay, VR...Volume for flow rate setting.

Claims (1)

[Claims] 1. A flowing down grain drying chamber is formed in the lower part of the flowing down grain humidity conditioning tank and communicates with the tank, and at a side position, the grain discharged from the drying chamber is stacked and returned in the humidity conditioning tack. A drying room hot air generator is attached to a circulation type grain dryer equipped with an elevator for drying rice, and the hot air generator is configured to be automatically controlled by an outside air temperature sensor and a filling amount sensor during rice drying. However, when drying the wheat husks, the outside air temperature sensor is not activated and the system is automatically controlled only by the filling amount sensor, and the switching between the two types of drying can be performed by a manual switching device. Grain drying equipment.