JPS6348588B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention mainly relates to a grain dryer for drying rice, wheat, etc. after harvesting.

[Conventional technology]

Above the grain drying section, which has a hot air supply chamber and a ventilation chamber adjacent to the grain flow path where hot air is exposed to the grains, there is a space for conditioning the grains after being exposed to the hot air (equalizing the moisture inside the grains). ), a valve is provided below the grain drying section to sequentially feed out the grain in the grain channel, and a grain dryer is further equipped with an elevator, etc. for circulating the grain. ,
It is desirable to form the grain flow path in a thin layer so that uneven drying does not occur between the grains in the grain flow path closer to the air supply chamber and those closer to the ventilation chamber. Therefore, it has been attempted to form a thin layer of grain flow channels by providing a plurality of grain flow channels (Japanese Unexamined Patent Application Publication No. 1983-1999).
61940 etc.).

[Problem that the invention seeks to solve]

On the other hand, this type of circulating grain dryer generally has a large machine height, so there is a need to keep the machine height as low as possible, especially in those for farmers, in relation to the height of the workplace. In many cases, even a slight level of lowness is important in its use.

In view of these points, the technical object of the present invention is to provide a grain dryer that has a machine height as low as possible without reducing drying efficiency.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention provides a grain chamber in the upper part and a grain collection gutter in the lower part, forms a grain drying section equipped with a hot air generator and an air exhaust fan between the two, and also provides a grain drying part equipped with a hot air generator and an exhaust fan. In a grain dryer comprising an elevator that connects a grain room and a grain room, (a) a plurality of grain flow passages are provided in the grain drying section;

(b) bending a pair of adjacent grain flow paths to each other;
The lower ends are merged and a discharge valve is provided.

C. The space surrounded by one side of the pair of grain flow channels facing each other is used as an exhaust chamber that communicates with the exhaust fan.

D. The other side surfaces of the pair of grain flow paths are brought into contact with hot air chambers communicating with a hot air generator.

E. A dust collection port facing into the ventilation chamber is opened at the confluence of the pair of grain flow paths.

This technical measure was taken.

[Effect]

The hot air flowing from the hot air chamber outside the pair of grain flow passages into the ventilation chamber surrounded by the pair of grain flow passages dries the grains flowing down the grain flow passages. However, due to the hot air blowing slightly diagonally upward through the confluence of the lower ends of the pair of grain flow channels,
The foreign matter mixed in the grains does not flow down with the grains, but gradually collects near the dust collection port, and is finally sucked into the ventilation chamber from the dust collection port and removed outside the machine.

[Embodiments of the invention]

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a central vertical cross-sectional view of the side surface of the grain dryer, and FIG. 2 is a cross-sectional view thereof. Almost the upper half of the grain dryer formed by a machine frame 5 is used as a grain chamber 3, and a grain drying part 4 is formed below it. That is, the upper end portion is provided with a pointed vein-like umbrella 6 and vein-like umbrellas 10, 10 for separating the grains, and guide walls 8, 12 fixed to both side walls to form a four-layer grain flow path 19, 15,1
6, 20 are formed, and this vein-shaped umbrella 6, 1
Grain channels 19, 15, 16, 20 consisting of porous walls connected to the respective lower ends of 0, 10 and guide walls 8, 12
form. Then, the lower ends of the grain flow path 19 and the grain flow path 15 are merged to form a lower discharge port 21, and
The lower ends of the grain flow path 16 and the grain flow path 20 are merged to form a lower discharge port 22, and a discharge valve 23 such as a rotary valve is installed at the bottom of each of the lower discharge ports 21 and 22 so as to be operated intermittently. At the upper end of the confluence section at the upper part of each of the lower exhaust ports 21 and 22, exhaust chambers 13 and 14 are provided.
The dust collection ports 11 facing each other are opened.

A bottom wall 7 is provided below the striated umbrella 6 in the center,
A hot air chamber 9 is formed by surrounding the bottom wall 7 and the grain flow channels 15 and 16, while a space surrounded by the grain flow channel 19 and the grain flow channels 15 is defined as a ventilation chamber 13. The space surrounded by the passages 16 and 20 is the ventilation chamber 1.
4 and eggplant. One end of each of the exhaust chambers 13 and 14 in the longitudinal direction is open and communicates with a fan box 29, and the fan box 29 is connected to the exhaust fan 28 through an opening 32.
connected to. Furthermore, a bottom wall 7a is provided below the guide wall 8, and a bottom wall 7b is provided below the guide wall 12. The space surrounded by the guide wall 12, the grain flow path 20, the bottom wall 7b, and the machine frame 5 are formed into hot air chambers 17 and 18, respectively.
One longitudinal end of the hot air chambers 9, 17, and 18, that is, the end opposite to the fan box 29, is opened to communicate with the air supply chamber 27, and the air supply chamber 27 receives the hot air through the opening 33. It communicates with the generator 26.

A grain collection gutter 24 is provided at the bottom of the machine frame 5 to receive the grains fed out from the discharge valve 23, and a discharge screw conveyor 25 is horizontally suspended at the bottom of the gutter 24, so that the discharge section of the screw conveyor 25 and the machine Frame 5
It is connected by an elevator 2 to a supply section of a supply screw conveyor 1 installed horizontally on the upper wall. Also,
A flow rate adjusting plate 30 is provided at each inlet of the grain channels 15, 16, 19, and 20, and a lower outlet 2
A flow rate adjustment plate 31 is provided at the upper merging portion of the flow rate control plates 1 and 22.

Next, specific operations in the above configuration will be explained. Grain, for example, raw paddy, is inputted from a supply hopper (not shown) attached to the lower part of the elevator 2 and pushed into the grain chamber 3 via the supply screw conveyor 1, and drying operation is started. That is, by intermittently operating the discharge valves 23 provided at the bottom of each of the lower discharge ports 21 and 22, the grain flow path 15,
The paddy in 16, 19, and 20 gradually flows down to the grain collection gutter 2.
4 and discharge screw conveyor 2
5. The grain falls back into the grain room 3 via the elevator 2 and the supply screw conveyor 1, and this cycle is repeated until drying is completed.

On the other hand, the drying hot air generated by the hot air generator 26 is
Due to the suction force of the exhaust fan 28, the air flows from the air supply chamber 27 into the hot air chambers 17, 18 and 9, and passes between grain particles flowing down in the grain flow paths 15, 16, 19, 20. The moisture content of the rice (mainly the moisture content of the rice husk)
After removing the air, it flows into the exhaust chambers 13 and 14 and is discharged outside the machine through the opening 32 of the fan box 29 by the exhaust fan 28. When the hot air is discharged, foreign matter that is mixed between the grain particles and does not leak out from the porous walls of the grain flow channels 15, 16, 19, and 20, such as straw and awns, is removed from the grain. Near the confluence of grain flow lower passages 15 and 19 and grain flow lower passage 16,
Due to the hot air blowing slightly diagonally upward from the confluence of 20 toward the exhaust chambers 13 and 14, the hot air gradually collects near the dust collection port 11 without flowing down with the paddy, and finally the dust flows into the exhaust chambers 13 and 14. It is sucked into the body and removed. Of course, not all impurities can be removed in one circulation (passage), but if the impurities flow down near the exhaust chambers 13 and 14 while circulating through the grain flow path many times, The dust is easily discharged from the dust collection port 11.

〔Effect of the invention〕

As described above, according to the present invention, the remarkable effects described below are achieved.

A: Since the grain flow path is bent, the height of the machine can be reduced without reducing the drying capacity by shortening the grain flow path.

B A pair of grain flow passages are bent together and a dust collection port is provided at the confluence at the lower end, and this dust collection port faces into the ventilation chamber, so that the air blows through this bent part slightly diagonally upward. By the wind, lightweight foreign matter that does not leak out from the porous wall is collected at the dust collection port, and is finally removed into the ventilation chamber, thereby improving drying efficiency.

C Since the dust collection port is located near the lower end of the ventilation chamber formed by surrounding a pair of grain flow channels, it is easy for dust to accumulate in the ventilation chamber at the end of drying, especially near the opposite side of the exhaust fan. Dust falls from the dust collection port.

[Brief explanation of the drawing]

FIG. 1 is a central vertical sectional view of the side surface of a grain dryer showing an embodiment of the present invention, and FIG. 2 is a horizontal sectional view thereof. 1... Supply screw conveyor, 2... Elevator, 3... Grain room, 4... Grain drying section, 5... Machine frame, 6... Veined umbrella, 7... Bottom wall, 8... Guide wall,
9... Hot air chamber, 10... Veined umbrella, 11... Dust collection port, 12... Guide wall, 13, 14... Ventilation chamber, 1
5, 16... Grain channel, 17, 18... Hot air chamber,
19, 20... Grain flow path, 21, 22... Lower discharge port, 23... Discharge valve, 24... Grain collection gutter, 25...
...Discharge screw conveyor, 26...Hot air generator, 27...Air supply room, 28...Exhaust fan, 29...
Fun box, 30, 31...Flow rate adjustment plate, 3
2, 33...opening.

Claims (1)

[Claims] 1 A grain room is installed in the upper part and a grain collection gutter is provided in the lower part, and a grain drying section equipped with a hot air generator and an exhaust fan is formed between the two, and an elevator is installed to connect the grain collection gutter and the grain room. In the grain dryer, the grain drying section is provided with a plurality of grain flow paths, and a pair of adjacent grain flow paths are bent to each other,
A discharge valve is provided by merging their lower ends, and a space surrounded by one side of the pair of grain flow paths facing each other is used as an exhaust chamber communicating with the exhaust fan, and a discharge valve is provided for the pair of grain flow paths. A grain dryer characterized in that the other side is brought into contact with a hot air chamber leading to a hot air generator, and a dust collection port facing into the exhaust chamber is opened at the confluence of the pair of grain flow paths.