JPS6161026B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a grain storage tank that also serves as a grain dryer.

Prior Art When storing grains, especially raw paddy, it is necessary to ventilate the stored grains, but in conventional grain storage tanks, ventilation is performed upward from the bottom of the tank.

However, since the grains are stored in tanks with a large thickness on the top and bottom, large wind pressure is required for ventilation, and since this ventilation occurs only in one direction, the air inlet area and the There is a large difference in the humidity of the air at the outlet, and ventilation with uniform humidity cannot be achieved.

In addition, as a grain dryer, the grains in the drying chamber are ventilated alternately from the left and right walls.
There is a method that dries the grains to a uniform moisture content, but since this method uses air from a flat surface, a large amount of grain pressure is applied to the part where the air blows, so that part needs to be made strong, so special Requires additional reinforcement equipment.

Problems to be Solved by the Invention The present invention eliminates the above-mentioned drawbacks, and is capable of uniformly moistening grains with a small wind pressure, and is a grain dryer that does not require a special reinforcing device at the wind outlet. The purpose is to provide a storage tank.

Means for Solving the Problem A tank body is formed by a peripheral wall and a bottom wall, four or more pipes having a large number of ventilation holes are erected along the inner surface of the peripheral wall, and these pipes are The tubes are connected to a high pressure source and a low pressure source, respectively, and when one of the tubes is connected to a high pressure source, the other tubes are connected to the high pressure source in turn.
The pipe is connected to a low pressure source, and the high pressure source is sequentially connected to other pipe bodies.

Function: In the operating state of storing and drying grains, air is supplied from one of the four pipes inside the tank body and air is taken from the other one. Ventilation is carried out transversely to the grain layer. Then, while air is being supplied from one pipe, other pipes that take in air are sequentially replaced, so the direction of ventilation changes. Furthermore, once the intake air is replaced by the other pipes, the pipe that was supplying air is replaced, and then the other pipes are used to take in air, so that the grains are ventilated and Dehumidification is performed evenly.

Example Embodiments of the invention will be described with reference to the drawings.

As shown in FIG. 1, the tank body 3 is composed of a cylindrical peripheral wall 1, an oblique bottom wall 2, and a truncated conical upper wall 18 having a supply hole 17 in the center. On the inner surface of the peripheral wall 1, four plates each having a semicircular cross section and having a large number of ventilation holes 4 are attached at equal intervals to form a tube body 5.
a, 5b, 5c, and 5d are formed, and these pipe bodies 5a, 5b, 5c, and 5d are connected to the air supply and intake pipe 16.
a, 16b, 16c, 16d respectively communicate with a high pressure source 6 with an air supply device and with a low pressure source 7 with an air suction device.

The ventilation holes 4 of the pipe bodies 5a, 5b, 5c, and 5d are the fourth
As shown in the figure, it has a diagonally downward guide plate 56 on its upper edge, so that the grain can be
c, 5d so as not to get inside.

The bottom wall 2 of the tank body 3 is provided obliquely with one of the tubes 5c at the upper position, and is made into a double wall with a gap between the upper bottom wall 2a and the lower bottom wall 2b.
A has a large number of air holes 57 opening diagonally downward, and has a switching valve 8 at the lower end of the pipe body 5c located above the slanting position.
and the air supply/intake pipe 16c extending from the low pressure source 7 to the pipe body 5.
c or the gap between the upper bottom wall 2a and the lower bottom wall 2b. 19 is a partition plate that cooperates with the switching valve 8 when the switching valve 8 closes the gap between the upper bottom wall 2a and the lower bottom wall 2b; 20 is the operating shaft of the switching valve 8;
1 is a handle.

A grain discharge valve 9 is provided at a lower position of the upper bottom wall 2a, and this grain discharge valve 9 is attached to an operating shaft 23 having a handle 22.

The high pressure source 6 and the low pressure source 7 consist of an air supply fan 25 and an intake fan 26 attached to the shaft of one pulley 24 connected to the motor, and are composed of pipes 27 and 2, respectively.
8 communicates with the air supply chamber 12 and the air intake chamber 13 .

As shown in FIG. 5, the air supply chamber 12 and the intake chamber 1
3 is formed by dividing an integral housing into left and right sides, and has intermittent rotation devices 29 and 30, and an air supply rotary valve 10 and an intake rotary valve 11 attached to shafts 31 and 32 of the intermittent rotation devices 29 and 30, respectively. There is. These rotary valves 10 and 11 are connected to a central hub 3 on which shafts 31 and 32 are mounted, as shown in FIG.
3, 34, outer rings 35, 36, central hub 33,
Arms 41 and 42 that connect 34 and outer rings 35 and 36
and one opening 37 in the outer rings 35, 36,
It has 38. And the air supply rotary valve 10
and four air supply holes 3 at equal intervals on the cylindrical surfaces of the air supply chamber 12 and intake chamber 13 surrounding the intake rotary valve 11.
9a, 39b, 39c, 39d and intake hole 40
a, 40b, 40c, 40d are provided, and air supply pipes 14a, 14b, 14c, 14d and intake pipe 1 are provided in these air supply holes 39a, 39b, 39c, 39d and intake holes 40a, 40b, 40c, 40d, respectively.
Install 5a, 15b, 15c, and 15d.

These air pipes 14a, 14b, 14c, 14
d and the intake pipes 15a, 15b, 15c, 15d are merged one by one to form the intake pipes 16a, 16b,
16c and 16d, and the air supply and intake pipes 16a and 16
b, 16c, and 16d are tube bodies 5a, 5b, and 5, respectively.
c, communicates with 5d.

In the above configuration, the supply hole 1 of the tank body 3
Grain such as raw rice is supplied from 7 and stored in the tank body 3, and the motor 24 rotates the air supply fan 25 and the intake fan 26, and also operates the intermittent rotation devices 29 and 30.

At this time, the grain discharge valve 9 attached to the tank upper bottom wall 2a is placed in the closed position, and the switching valve 8 opens the lower end of the pipe body 5c, and the partition plate 19
The gap between the upper bottom wall 2a and the lower bottom wall 2b is closed in cooperation with the lower bottom wall 2b.

Intermittent rotation devices 29 and 30 operate as follows.

That is, the shaft 3 is rotated by the intermittent rotation device 29.
Air supply rotary valve 10 with central hub 33 attached to 1
is intermittently rotated, and the opening 37 is opened to the air supply holes 39a, 39b, 39 of the air supply chamber 2 by the intermittent rotation of the outer ring 35 connected to the central hub 33 via the arm 41.
After all, the high pressure source 6 is intermittently connected to the air pipes 14a, 14b, 14c, and 14d via the air holes 39a, 39b, 39c, and 39d.

Similarly, the intermittent rotation device 30 causes its shaft 32 to
The intake rotary valve 11 to which the central hub 34 is attached rotates intermittently, and due to the intermittent rotation of the outer ring 36 connected to the central hub 34 via an arm 42, the opening 3
8 are intake holes 40a, 40b, 40 of the intake chamber 13
The low pressure source 7 is intermittently connected to the intake pipes 15a, 15b, 15c, and 15d via the intake holes 40a, 40b, 40c, and 40d.

In this case, the high pressure source 6 is
is connected to one air pipe 14a, the low pressure source 7 is connected to the intake pipe 15 which merges with this air pipe 14a.
The high pressure source 6 is intermittently connected to the other intake pipes 15b, 15c, and 15d except for a, and then returns to the intake pipe 15c immediately before the last intake pipe 15d. air pipe 14b
In this state, the low pressure source 7 is connected to the intake pipes 15c, 15d, 15a, 15 by the intermittent rotation device 30.
Intermittent communication is performed in the order of d, and the same state is repeated sequentially thereafter.

Therefore, when the high pressure source 6 is connected to the air pipe, the intake pipe that joins the air pipe is connected to the low pressure source 7.
On the other hand, if the low pressure source 7 is in communication with the intake pipe, the air supply pipe that merges with the intake pipe is blocked from communicating with the high pressure source 6 by the outer ring 36 of the rotary valve 11. Since the valve 10 is shut off by the outer ring 35, there is no need to provide a switching valve between the merging air supply pipe and intake pipe.

The air pipes 14a, 14b, 14c described above,
14d and intake pipes 15a, 15b, 15c, 15
The air is supplied from d through the intake pipes 16a, 16b, 16.
c, 16d, the pipe body 5a in the tank body 3,
5b, 5c, 5d, each tube body 5a, 5b,
Air is supplied and taken in from 5c and 5d.

That is, while air is being supplied from the pipe body 5a, air intake is performed in the order of pipe bodies 5b, 5c, 5d, and 5c, and then the air supply is transferred to the pipe body 5b, and the intake air is
Steps c, 5d, 5a, and 5d are performed in this order, and the same actions are repeated in rotation.

Control of the air supply rotary valve 10 and the intake rotary valve 11 in the above description is performed as follows.

That is, as shown in FIG. 9, the rotating shaft 42 is connected to the control motor M1 via the reducer 41,
This rotating shaft 42 includes an intake rotary valve forward rotation control plate 43, an intake rotary valve reverse rotation control plate 44, and an air supply rotary valve control plate 4.
5, and these intake rotation valve forward rotation control plates 43,
A micro switch MS4,
MS5 and MS6 are provided. As shown in FIG. 10, the intake rotary valve forward rotation control plate 43 is provided with protrusions 46 and 47 that are 90 degrees out of phase for operating the micro switch MS4, and the intake rotary valve reverse rotation control plate 44 is provided with protrusions 46 and 47 that are 90 degrees apart in phase. is micro switch MS5
90 from the protrusion 47 for operating the protrusion 48
The air supply rotary valve control plate 45 is provided with a protrusion 49 for activating the micro switch MS6, which is further delayed in phase by 90 degrees than the protrusion 48.

Further, an intake rotary valve stop control plate 50 that rotates in synchronization with the intake rotary valve 11 is provided, and this intake rotary valve stop control plate 50 has protrusions 51 and 51 with a phase change of 90 degrees.
52, 53, 54 are provided, and these protrusions 51, 5
Limit switches are located within the rotation locus of 2, 53, and 54.
Ls1 and Ls2 are arranged, and the air supply rotary valve 10
An air supply rotary valve stop control plate 55 is provided which rotates in synchronization with the air supply rotary valve stop control plate 55, and this air supply rotary valve stop control plate 55 is also provided with four protrusions 56 with a phase change of 90 degrees. Place limit switch Ls3.

The circuit is shown in FIG. 8. First, when pushbutton PB-1 is turned on, relay R1 is activated, and its contacts R1-1 hold the relay R1 self-holding, and the other Control motor M1 is operated by contact R1-2.

The rotation of the control motor M1 is transmitted to the rotating shaft 42 through the reducer 41, and the rotation of the intake rotating valve normal rotation control plate 4
3. The intake rotary valve reversal control plate 44 and the air supply rotary valve control plate 45 rotate. .

As shown in FIG. 11, as the intake rotation valve normal rotation control plate 43 rotates, its protrusion 46 operates the micro switch MS4 to turn it on, and the relay MC1 operates. Contact MC1 due to the operation of relay MC1
-1, the relay MC1 is self-held;
The normal rotation relay MF2 of the intake rotary valve motor is activated by the other contact MC1-2, so that the intake rotary valve motor rotates in the normal direction, and the intake rotary valve 11 also rotates.

When the intake rotary valve 11 rotates 90 degrees, the limit switch Ls1 is turned off by the protrusion 51 of the intake rotary valve stop control plate 50, the relay MC1 is deenergized, and its contacts MC1-1 and MC1-2 are turned off. The normal rotation relay MF2 of the intake rotary valve motor is also deenergized, the intake rotary valve motor stops, and the intake rotary valve 11 also stops its rotation.

Next, the control motor M1 rotates 90 degrees, and the rotation of the intake rotation valve forward rotation control plate 43 causes the protrusion 4 to rotate.
7 operates micro switch Ms4 to turn it on, and relay MC1 operates.

The relay MC1 is self-held by the contact MC1-1 caused by the operation of the relay MC1, and other contacts
The normal rotation relay MF2 of the intake rotary valve motor is operated by MC1-2, the intake rotary valve motor rotates in the normal direction, and the intake rotary valve 11 also rotates together.

When the intake rotary valve 11 rotates 90 degrees, the limit switch Ls1 is turned off by the protrusion 52 of the intake rotary valve stop control plate 50, the relay MC1 is deenergized, and its contacts MC1-1 and MC1-2 are turned off. The normal rotation relay MF2 of the intake rotary valve motor is also deenergized, the intake rotary valve motor stops, and the intake rotary valve 11 also stops its rotation.

Subsequently, the control motor M1 rotates 90 degrees, and as the intake rotary valve reversal control plate 44 rotates, its protrusion 48 operates the micro switch Ms5 to turn it on, and the relay MC2 operates. Due to the operation of relay MC2, contact MC2-1 causes the relay MC to
2 is self-held, and the other contact MC2-2 operates the reversing relay MR2 of the intake rotary valve motor, the intake rotary valve motor reverses, and the intake rotary valve 1
1 also rotates together.

When the intake rotary valve 11 rotates 90 degrees, the limit switch Ls2 is turned off by the protrusion 51 of the intake rotary valve stop control plate 50, the relay MC2 is deenergized, and its contacts MC2-1 and MC2-2 are turned off. The reversing relay MR2 of the intake rotary valve motor is also deenergized, the intake rotary valve motor stops, and the intake rotary valve 11 also stops rotating.

Further, the control motor M1 rotates 90 degrees, and as the air supply rotary valve control plate 45 rotates, its protrusion 49 operates the micro switch Ms6 to turn it on, and the relay MC3 is activated.

The relay MC3 is self-held by the contact MC3-1 of the relay MC3, and the other contact MC3-2
The relay M3 of the air supply rotary valve motor is activated, the air supply rotary valve motor rotates, and the air supply rotary valve 1 is activated.
0 also rotates.

When the air supply rotary valve 10 rotates 90 degrees, the limit switch Ls3 is turned off by the projection 56 of the air supply rotary valve stop control plate 55, the relay MC3 is deenergized, and its contacts MC3-1 and MC3-2 are turned off. Then, the relay M3 of the air supply rotary valve motor is also deenergized, the air supply rotary valve motor stops, and the air supply rotary valve 1
0 also stops its rotation.

Then, when the control motor M1 rotates 90 degrees,
As the intake rotation valve normal rotation control plate 43 rotates, its protrusion 46 operates the micro switch Ms4, and the above operation is repeated thereafter.

PB-2 is a push button for deenergizing relay R.

When taking out grains from the tank body 3, switch the switching valve 8 located at the upper part of the tank bottom wall 2 provided diagonally to stop the air supply and intake to the pipe body 5c, and
The air supply/intake pipe 16c is communicated with the gap between the upper bottom wall 2a and the lower bottom wall 2b of the bottom wall 2. At the same time, air supply rotary valve 1
The intermittent rotation device 29 stops rotating at the position where the opening 37 of 0 communicates with the air supply hole 39c, and the intake rotary valve 11
The intermittent rotation device 30 stops rotating at a position where the opening 38 communicates with the intake hole 40a.

In this state, when the grain discharge valve 9 provided at the lower part of the upper bottom wall 2a is opened, the grains in the tank body 3 are discharged to the outside of the tank body 3 through the opening of the grain discharge valve 9. However, at this time, the high pressure source 6, the pipe 27, the air supply chamber 12, the opening 37 of the air supply rotary valve 10, the air supply hole 39C, the air supply pipe 14C, Air intake pipe 1
The air that has passed through 6C is blown out into the tank body 3, promoting the discharge of grains from the upper bottom wall 2a.

The air blown into the tank body 3 by the upper bottom wall 2a is transferred to the pipe body 5a, the air supply/intake pipe 16a, and the intake pipe 1.
5a, intake hole 40a, opening 3 of intake rotary valve 11
8, the suction chamber 13, and is sent to the low pressure source 7 through the pipe 28.

Effects As explained above, in the present invention, a tank body is formed by a peripheral wall and a bottom wall, four or more pipes having a large number of ventilation holes are erected along the inner surface of the peripheral wall, These tubes are connected to a high pressure source and a low pressure source, respectively, and when one of the tubes communicates with the high pressure source, each of the other tubes communicates with the low pressure source, so that the high pressure source is connected to the other one in turn. The main feature is a grain dryer/storage tank that is connected to one of the pipes in rotation, so the airflow that crosses inside the tank body changes its flow direction sequentially, so the grains inside the tank body are kept at a uniform humidity. Since three or more air suction parts are arranged at equal intervals for one air ejection part, air can pass through any part of the tank, and furthermore, Since ventilation is directed toward the side wall, sufficient ventilation can be achieved even if the thickness of the top and bottom of the stored grain is increased, and ventilation within the grain is made possible with low pressure.

In addition, in the present invention, since the part that accommodates the grains to be ventilated and dried is the tank body, a special reinforcing device is not required for the grain storage part compared to a case where the grain accommodation part is a porous ventilation surface such as a wire mesh. .

In the above embodiments, an air supply fan was used as the high pressure source and an intake fan was used as the low pressure source. A fan may be used and the low pressure source may be opened to the atmosphere, or the high pressure source may be opened to the atmosphere and an intake fan may be used as the low pressure source.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional view of the tank body, and FIG. 2 is a cross-sectional view of the tank body.
3 is a bottom view with the lower bottom wall of FIG. 1 removed, FIG. 4 is a partially enlarged view of FIG. 1, FIG. 5 is a schematic sectional view of the air supply/intake device, and FIG. A side view of a portion of Figure 5, Figure 7 is a sectional view of the rotary valve, Figure 8 is a control circuit diagram of the rotary valve, Figure 9 is a front view of the control section, and Figure 10 is a side view of each control board. Figure 11 is a time chart. 1... Peripheral wall, 2... Bottom wall, 2a... Upper bottom wall,
2b... Lower bottom wall, 3... Tank body, 4... Ventilation hole, 5a, 5b, 5c, 5d... Pipe body, 6...
High pressure source, 7...Low pressure source, 8...Switching valve, 9...
Grain discharge valve, 10...Air supply rotary valve, 11...Intake rotary valve, 12...Air supply chamber, 13...Intake chamber, 14
a, 14b, 14c, 14d... air pipe, 15
a, 15b, 15c, 15d...Intake pipe, 16
a, 16b, 16c, 16d...Air supply and intake pipe, 44
...Stomata.

Claims (1)

[Claims] 1. A tank body is formed by a peripheral wall and a bottom wall,
Four or more tubes having a large number of ventilation holes are installed along the inner surface of the peripheral wall, and these tubes are connected to a high pressure source and a low pressure source, respectively, and when one of the tubes communicates with the high pressure source, The grain dryer/storage tank is characterized in that each of the other pipe bodies sequentially communicates with a low pressure source, and the high pressure source is sequentially communicated with one of the other pipe bodies in rotation. 2. The grain dryer/storage tank according to claim 1, wherein the ventilation hole has a guide plate extending diagonally downward into the tank body from the upper edge thereof. 3. The bottom wall has a double-walled structure consisting of an upper bottom wall with many pores and a normal lower bottom wall, and is installed obliquely with the lower end of one of the pipes at an inclined upper position, and a high pressure source and a A switching valve is arranged to switch and communicate a low pressure source between the one pipe body and the double wall, and a grain discharge valve is arranged at a position below the slope of the double wall. A grain dryer and storage tank according to claim 1 or 2. 4. A high pressure source and a low pressure source are connected to an air supply chamber and an intake chamber each having an air supply rotary valve and an intake rotary valve that rotate intermittently, respectively, and each of the air supply chamber and intake chamber has a number equal to the number of pipe bodies. Claims 1 or 2 or 2, characterized in that an air supply pipe and an intake pipe are provided, and these air supply pipes and intake pipes are merged one by one and communicated with the pipe body as an air supply and intake pipe, respectively. The grain dryer and storage tank according to item 3.