JPH10325680A - Grain ventilating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grain ventilating device which can ventilate the paddy favorably, regardless of the quantity of accumulated paddy. SOLUTION: A damper storage 62 between a blower 60 and an exhaust pipe 74 is provided with a damper 66. The quantity of air per unit time flowing in the damper storage 62 can be changed, by rotating this damper 66 thereby changing the numerical aperture within the damper storage 62, consequently the quantity of air inhaled from the intake tube 20 can be changed. Therefore, this can adjust the quantity of intake from the intake tube 20 into the quantity of intake suitable for the quantity of accumulated paddy, and maintain the quality of paddy.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a grain ventilation device used for ventilation cooling of accumulated grains.

[0002]

2. Description of the Related Art Usually, paddy is dried with a hot air dryer or the like and then crushed by a rice huller to remove rice husks from the rice hulls to produce brown rice. However, the rice hull immediately after hot air drying is hot. However, if hulling is performed in this state, the surface of brown rice is scratched (so-called “skin deviation” occurs), and thus the hulling is performed after sufficiently cooling the hulling.

[0003] In order to cool the rice after hot air drying in a short time, a grain ventilation device is generally used.

[0004] The grain ventilation device is provided with an intake cylinder having a bottomed cylindrical shape with a lower end closed and having a large number of ventilation holes formed in the outer peripheral portion. The lower end side of the intake cylinder is provided, for example, in a paddy tank in which heated paddy immediately after the completion of hot-air drying is stored and deposited, and is buried in a paddy layer deposited in the paddy tank.

[0005] A blower is provided on the upper open end side of the intake cylinder. When the blower is operated, a negative pressure is generated in the intake cylinder, and the inside of the paddy layer in the paddy tank is formed through the vent hole. Is sucked and exhausted to the outside of a barn where a paddy tank is installed, for example, and instead, room-temperature air enters into the paddy layer. Here, since the air taken in by the suction cylinder is air warmed by the paddy heated by the drying operation, such air is exhausted to prevent stagnation in the paddy tank, and instead, the room temperature is reduced to room temperature. The heated paddy can be cooled in a short time by letting in air.

[0006]

By the way, in such a grain ventilation device, the amount of air sucked by the blower per unit time is determined by the thickness of the paddy layer, that is, the amount of paddy stored in the paddy tank. When the accumulation amount is small, the ventilation resistance by the accumulated paddy (that is, the ventilation resistance in the paddy layer) decreases, so that the intake air amount per unit time increases.

[0007] However, if the air intake volume per unit time of the blower is too large, the deposited paddy is rapidly dried and cooled, so that the moisture value and temperature balance between the surface and the inside of the paddy are lost. This may cause a so-called body crack or the like, and may degrade the quality.

An object of the present invention is to provide a cereal ventilation device that can satisfactorily ventilate regardless of the amount of accumulated paddy in view of the above facts.

[0009]

According to a first aspect of the present invention, there is provided a cereal ventilation device, wherein the cereal ventilation device has a cylindrical shape having a large number of ventilation holes formed in an outer peripheral portion thereof, and an intake cylinder buried in a piled grain layer. An intake unit that generates a negative pressure inside and suctions and exhausts air in the grain layer, and an intake amount adjustment unit that adjusts an amount of air to be sucked from the intake cylinder by the intake unit.
It has.

[0010] According to the grain ventilation device having the above structure, when the intake means is operated in a state where the intake cylinder is buried in the grain layer, a negative pressure is generated in the intake cylinder, and the air between the grain layers is sucked from the vent hole. And exhausted through the intake means. In addition, when air is sucked from the ventilation holes of the intake cylinder, air is newly taken in between the grain layers. Therefore, for example, if the present apparatus is applied to a heated grain immediately after hot-air drying, heat retention between grain layers can be prevented, and the grain can be cooled in a short time.

If the intake air amount adjusting means is operated when the amount of air to be sucked into the accumulated grains is not appropriate, even if the output of the suction means does not change, the amount of air to be sucked from the intake cylinder is not changed. The amount is changed to an appropriate amount for the deposited grain. Therefore, for example, if the present apparatus is applied to a heated grain immediately after hot-air drying, it is possible to prevent quality deterioration such as a body crack due to excessive intake.

[0012]

FIG. 1 is a front sectional view of a grain ventilation device 10 according to one embodiment of the present invention.
As shown in this figure, the grain ventilation device 10 is provided indoors of a building 12 such as a barn. Further, as shown in FIG. 1, specifically, FIG. 2 which is an enlarged front sectional view of a part of FIG. 1, the grain ventilation device 10 includes an intake cylinder 20. The intake cylinder 20 has a conical shape whose lower end converges downward and has a closed bottomed cylindrical shape, and has a large number of ventilation holes 22 formed in an outer peripheral portion thereof.

This intake cylinder 20 is arranged inside a box-shaped paddy tank 24 installed in the building 12. A large amount of paddy dried by a grain drying device (not shown) is stored and deposited in the paddy tank 24. In this way, the paddy is accumulated inside each paddy tank 24, and thereby the intake cylinder 2
0 is buried inside the accumulated paddy layer (grain layer).

An outlet 26 is formed in the bottom 24A of the paddy tank 24. The outlet 26 is connected to the building 12
Paddy tank 24 through a funnel-shaped through-hole 28 formed in the floor portion 12A and a pipe provided with a slide shutter.
Is connected to a hulling machine (both not shown) installed below.

Also, as shown in FIG.
Has an open upper end, and a male screw 32 is formed on the outer periphery of the upper end.

Further, as shown in FIG.
Above 0, a cylindrical connecting pipe 36 is provided.
As shown in FIG. 2, a female screw 38 is formed at the lower end of the connecting pipe 36, and the male screw 32 of the intake cylinder 20 is screwed into the female screw 38. Thus, the intake cylinder 20 is integrally connected to the connection pipe 36.

Also, as shown in FIG.
A plurality of hooks 42 (only two hooks are shown in FIG. 1) are provided on the outer peripheral portion of the upper end. These hooks 4
A chain 46 having a turnbuckle 44 connected to one longitudinal end is locked to 2. The other ends of the chains 46 are locked by hooks 48 fixed to the side wall 24B of the paddy tank 24. Therefore, by rotating the turnbuckle 44 to adjust the length between both ends of the chain 46 including the turnbuckle 44 of the chain 46, the connection pipe 36 and the intake cylinder 20 stand inside each paddy tank 24. be able to.

Further, a blower 60 as an intake means is connected to the upper end of the connecting pipe 36. The blower 60 is provided with a motor 61.
The rotating blades (not shown) which rotate by receiving the driving force of the motor 61 are accommodated in the inside. When the motor 61 operates, the rotary wings rotate, and a negative pressure is generated inside the connecting pipe 36 so as to suck air.

On the side of the blower 60, an exhaust pipe 74 made of a synthetic resin material such as a vinyl chloride resin is provided. One end of the exhaust pipe 74 penetrates through the wall 12B of the building 12 and opens outside the building 12, so that the air sucked by the blower 60 can be exhausted outside.

Here, as shown in FIG. 1 and, more specifically, in FIG. 3, the connecting portion of the blower 60 with the exhaust pipe 74 is a cylindrical damper accommodating portion 62, and the blower 60 It is connected to the exhaust pipe 74 via the portion 62.

As shown in FIG. 4, the damper housing 62
Has a radially and horizontally elongated shaft 64
Is supported. A disk-shaped damper 66 as an intake air amount adjusting means is integrally provided at an axially intermediate portion of the shaft 64. When the shaft 64 is rotated around its axis, the damper 66 rotates. .

At one end of the shaft 64 in the axial direction, a control device 68 including, for example, a relay circuit, a plurality of gears, and a motor is provided, and the driving force of the motor of the control device 68 is controlled by a plurality of gears. The damper 66 can be rotated by transmitting it to the shaft 64 via the shaft 64, and the shaft 64 is locked so that the shaft 64 does not rotate even if the damper 66 receives the wind pressure of the air flowing in the damper housing 62. .

Further, the amount of air per unit time of the air W flowing through the damper accommodating portion 62 per unit time is located on the leeward side of the damper 66 (ie, downstream of the air W flowing through the damper accommodating portion 62). An air flow sensor 70 for detecting is provided. The air volume sensor 70 is electrically connected to an air volume meter 72 provided outside the damper accommodating section 62 so that the air volume per unit time in the damper accommodating section 62 can be confirmed. The air flow meter 72 is electrically connected to the control device 68, and compares the measured air flow with a standard air flow preset in the control device 68 to compare the air flow in the damper accommodating section 62 with the standard air flow. Are rotated so that the shaft 64 is rotated substantially so that the damper 66 is appropriately rotated.

Note that the standard air volume here means that when aeration and cooling are performed at this air volume, the moisture value and temperature of the inside and the surface of the paddy can be kept in balance, and the optimal air volume for aeration and cooling in the paddy layer can be maintained. It is.

Next, the operation of the present embodiment will be described. A large amount of paddy that has been heated by hot-air drying by a grain dryer (not shown) is conveyed by a conveying means such as a thrower and is sequentially put into the paddy tank 24. When the paddy is put into the paddy tank 24 and deposited in the paddy tank 24, the intake cylinder 20 of the grain ventilation device 10 is buried in the paddy layer (grain layer) formed by a large amount of paddy.

Next, in this state, the motor 6 of the blower 60 is
1 to rotate the rotary blades, a negative pressure is generated inside the connecting pipe 36 of the blower 60 and the
The air W is sucked from the inside of the paddy layer deposited in the paddy tank 24 via. The sucked air W is exhausted from the exhaust pipe 74 to the outside of the building 12 via the connecting pipe 36, the blower 60, and the damper housing 62. In addition, when the air W between the paddy layers is sucked and exhausted, air at normal temperature is taken into the paddy layers from the opening side (that is, above) of the paddy tank 14 instead. As described above, the air W warmed by the paddy is exhausted to the outside of the building 12 without staying in each tank 14, and the room-temperature air is discharged into the paddy tank 14 (particularly, the paddy layer in the paddy tank 14). By taking in, the paddy heated by the drying operation can be cooled in a short time.

The air volume of the air W sucked by the blower 60 is detected by an air volume sensor 70 in the damper accommodating section 62 and monitored via an air volume meter 72.

Here, the paddy is accumulated only up to the range B indicated by the two-dot chain line where the damper 66 has a larger air volume than the standard air volume in the solid line state of FIG. The blower 60
When airflow cooling of the paddy is continued by sucking the air W in the paddy layer, the airflow sensor 70 detects the airflow such that the moisture value and the temperature of the inside of the paddy and the balance of the temperature are lost, and the airflow meter 72 When the control device 68 receives the electric signal at this time, the motor is driven, and the shaft 64 is rotated in the direction of arrow C in FIG. 3 until the damper 66 is in the two-dot chain line state in FIG.
As a result, the end face of the damper 66 in the plate thickness direction is inclined to the windward side and the inside of the damper accommodating portion 62 is partially (for example, up to 50% when the opening ratio in the solid line state in FIG. 3 is 100%).
Close. Therefore, the air W in the damper accommodating portion 62
The number of openings through which the air can pass decreases, and the air volume per unit time decreases. As a result, the amount of air W sucked by the blower 60 approaches the standard air volume. For this reason, the moisture value and temperature balance between the inside and the surface of the paddy can be maintained, and the quality of the paddy can be maintained.

In this embodiment, since the damper 66 is provided on the leeward side of the blower 60, when the damper 66 is closed, the exhaust resistance applied to the rotating blades of the blower 60 increases. The current value of the motor increases and the rotation speed decreases, but the controller 68 is set in advance to adjust the damper 66 in consideration of the decrease in the rotation speed of the motor 61. For this reason, the amount of the air W sucked by the blower 60 can be approximated to the standard air volume.

Here, the air volume adjustment as in the present embodiment is performed by, for example, using a blower 6 using an inverter or a variable resistor.
It is also possible to adjust the number of revolutions of the motor 61, but the components such as the inverter are expensive and costly. On the other hand, in the present embodiment, since the air volume can be adjusted without using such expensive components, the cost is lower as compared with a configuration using an inverter, a variable resistor, or the like.

In this embodiment, the damper 66 as the intake air amount adjusting means is provided between the blower 60 and the exhaust pipe 74. It is sufficient that the damper 66 is provided so that the amount of W can be changed.
6 may be provided. However, in this case, if the damper 66 is closed, the exhaust resistance applied to the rotating blades of the blower 60 decreases, and the number of rotations of the motor 61 of the blower 60 increases, so that the damper 66 is adjusted in anticipation of this. The control device 68 is set in advance.

In the present embodiment, the air flow sensor 70
And the airflow meter 72 are used to measure the airflow per unit time, but a measuring means for measuring the current state when judging whether or not the amount of the air W sucked from the intake cylinder 20 is appropriate. Is not limited to this. For example, the air flow sensor 7
0 and a wind pressure sensor and a wind pressure gauge are applied instead of the air flow meter 72,
The configuration may be such that the amount of air W sucked from the intake cylinder 20 is calculated from the measured wind pressure.

Further, in the present embodiment, the control device 68
Although the configuration is such that the damper 66 is rotated, for example, a configuration may be employed in which a handle or the like is provided at the end of the shaft 64 and the damper 66 is manually operated from outside the damper housing portion 62.

[0034]

As described above, since the grain ventilation device according to the present invention can regulate the amount of air sucked by the intake cylinder, it can ventilate well regardless of the amount of accumulated paddy.

[Brief description of the drawings]

FIG. 1 is a front cross-sectional view illustrating an entire configuration of a grain ventilation device according to an embodiment of the present invention.

FIG. 2 is an enlarged front sectional view of an intake cylinder of the grain ventilation device according to one embodiment of the present invention.

FIG. 3 is a front sectional view showing an internal structure of an intake air amount adjusting means of the grain ventilation device according to one embodiment of the present invention.

FIG. 4 is a plan sectional view showing an internal structure of an intake air amount adjusting means of the grain ventilation device according to one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Grain ventilation apparatus 20 Intake cylinder 22 Vent hole 60 Blower (intake means) 66 Damper (intake amount adjustment means)

Claims (1)

[Claims] 1. An intake cylinder buried in a pile of a grain layer having a plurality of air holes formed in an outer peripheral portion, and a negative pressure is generated inside the intake cylinder to generate a negative pressure in the grain layer. A grain ventilation device comprising: an intake unit that sucks and exhausts air; and an intake amount adjustment unit that adjusts an amount of air that is sucked from the intake cylinder by the intake unit.