JP3042988B2 - Grain ventilation equipment - Google Patents

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, the deposited paddy layer has a small airflow resistance in the upper part (surface layer side) and a large airflow resistance in the lower part (deep layer side). Therefore, there is a problem that the amount of air inhaled by the blower per unit time is smaller in the lower part than in the upper part of the paddy layer, and the lower part cannot provide a sufficient ventilation cooling effect.

The present invention has been made in view of the above circumstances, and has as its object to provide a grain ventilation device that can uniformly ventilate the entire layer of deposited grains.

[0008]

According to a first aspect of the present invention, there is provided a cereal ventilation device, wherein a plurality of ventilation holes are formed in an outer peripheral portion, and a base end is located on a surface side of a deposited cereal layer and a deep side of the cereal layer. A cylindrical intake cylinder buried so that the distal end is located, and connected to the base end of the intake cylinder, generating a negative pressure inside the intake cylinder to suck air in the grain layer and exhaust the air. And a suction means that performs the following: a grain ventilating device having: an opening area of the ventilation hole per unit surface area of an outer peripheral portion of the intake cylinder that increases from a base end side to a tip end side of the intake cylinder. And

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 in the grain layer is released from the vent hole. It is sucked 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.

Further, the intake cylinder of the present device has a small opening area per unit surface area on the outer peripheral portion of the intake cylinder on the base end side located on the surface side of the deposited grain layer, and the distal end located on the deep side. Therefore, since the airflow resistance is larger than the surface layer side and the airflow amount per unit opening area of the ventilation hole is smaller, the airflow amount per unit surface area of the outer peripheral portion in the deep layer side portion increases. Thereby, the difference in the amount of intake air between the surface layer and the deep layer side of the grain layer is reduced, and air is uniformly sucked from the grain layer. For this reason, as described above, when the deposited grain is aerated and cooled, the entire grain is uniformly cooled.

[0011]

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.

Here, as shown in FIG. 2, these ventilation holes 22 have a larger diameter than the ventilation holes 22A formed on the upper end side (portion A in FIG. 2) of the intake cylinder 20.
The opening area (the size of the hole) is larger in the vent hole 22B formed in the middle part (portion B in FIG. 2). Thus, the opening area of the vent hole 22 per unit surface area of the outer peripheral portion of the intake cylinder 20 is larger at the middle portion than at the upper end side of the intake cylinder 20.

Further, on the lower end side of the intake cylinder 20 (portion C in FIG. 2), the opening area of the vent hole 22C is
B, the opening area of the vent hole 22 per unit surface area of the outer peripheral portion of the intake cylinder 20 is increased.
Are larger on the lower end side than on the upper end side and the intermediate part.

The intake cylinder 20 is disposed 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 deposited inside each paddy tank 24 so that the intake cylinder 20 is buried inside the deposited 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.

Further, 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 these 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 connecting 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 rotating blades in the blower 60 rotate, and a negative pressure is generated inside the connection pipe 36 so as to suck air. Further, one end of an exhaust pipe 74 made of a synthetic resin material such as a vinyl chloride resin is connected to the blower 60.
The other end of the exhaust pipe 74 penetrates 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.

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, 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 and the blower 60. In addition, when the air W in the paddy layer is sucked and exhausted, air at room temperature is taken into the paddy layer from the opening side (that is, above) of the paddy tank 14 instead. Thus, the air W warmed by the paddy is supplied to each tank 14.
By exhausting to the outside of the building 12 and keeping the room temperature air in the paddy layer of the paddy tank 14 without staying inside the paddy pad, the paddy heated by the drying operation can be cooled in a short time.

Here, inside the paddy layer, the ventilation resistance of the air W is smaller at the upper part, that is, closer to the surface layer,
In other words, the deeper the layer, the greater the air W's airflow resistance,
The amount of intake air per unit area of the vent hole 22 decreases toward the lower part of the paddy tank 24. However, the present grain ventilation device 1
0 is the upper end side of the intake cylinder 20 (the range A in FIG. 2).
2) compared to the vent hole 22A (the area B in FIG. 2).
Is larger than the vent hole 22B, and the vent hole 22C on the lower end side (portion C in FIG. 2) of the intake cylinder 20 is the vent hole 2B.
Since it is larger than 2B, the intake air amount per unit surface area of the outer peripheral portion of the intake cylinder 20 increases in the intermediate portion from the upper end side of the intake cylinder 20 and further in the lower end portion than the intermediate portion. Therefore, as a result, the difference in the amount of intake air per unit time between the upper end side, the middle part, and the lower end side of the intake cylinder 20 is reduced. For this reason, the whole paddy accumulated inside the paddy tank 24 can be uniformly ventilated and cooled.
Even if the paddy is stored for a long time in 4, it is possible to prevent the deterioration of the quality of the paddy, particularly the paddy in the lower part of the paddy layer, which was conventionally difficult to cool, due to heat.

Even if the rice stored in the rice tank 24 is subjected to a rice hulling machine to remove the rice husks from the rice hulls to produce brown rice, the rice hulled in the rice hulling tank 24 can be sufficiently cooled in a short period of time. During the hulling by the machine, the brown rice is not damaged (so-called skin shift), and the quality of the rice (brown rice) can be maintained.

Further, in the present grain ventilation device 10, since the paddy in the paddy tank 24 is aerated and cooled in a short time, the time from the end of the drying operation to the start of the hulling operation by the huller can be shortened.

In the present embodiment, the size of the vent hole 22 per unit surface area of the intake cylinder 20 is changed in three stages: the upper end side, the middle part, and the lower end side of the intake cylinder 20. This step is not limited to three steps and may be divided into two steps or four or more steps.

Further, in the present embodiment, the size of the vent hole 22 is changed at the upper end side, the middle portion, and the lower end side of the intake cylinder 20 to change the opening area of the vent hole 22 per unit surface area of the intake cylinder 20. However, the configuration for changing the opening area of the ventilation hole 22 per unit surface area of the intake cylinder 20 is not limited to this. For example, as shown in FIG. 3, even if the sizes of all the vent holes 22 are substantially equal, the upper end side (portion of the range A in FIG. 3) and the intermediate portion (the range B in FIG. Portion), and at the lower end side (portion of range C in FIG. 3)
By changing the number of the vent holes 22 per unit surface area, the opening area of the vent holes 22 per unit surface area of the intake cylinder 20 can be changed, and the same effect as described above can be obtained.

Further, in the present embodiment, the grain ventilation device 10 is configured to be accommodated in the paddy tank 24 and to suck the air W in the layer of the accumulated paddy, but the intake cylinder 20 of the grain ventilation device 10 is As long as the structure is buried in the paddy layer, for example, the present grain ventilation device 10 may be applied to the paddy simply and widely deposited without using the paddy tank 24.

In the present embodiment, the present invention is applied to the ventilation cooling of the paddy, but the invention may be applied to the ventilation cooling of grains other than the paddy. For example, the present invention may be applied to aeration cooling of brown rice after hulling, milled white rice, and grains other than rice, such as wheat, soybeans, and red beans.

[0029]

As described above, in the grain ventilation device according to the present invention, the difference in the amount of ventilation between the surface side and the deep side of the deposited grain layer can be reduced, and the entire deposited grain layer can be made uniform. Can be ventilated.

[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 a main part of the grain ventilation device according to one embodiment of the present invention.

FIG. 3 is an enlarged front sectional view of a main part of a modified example 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)

Continuation of the front page (56) References JP-A-10-325680 (JP, A) JP-A-10-309123 (JP, A) JP-A 9-499 (JP, U) JP-A 58-141192 (JP) , U) Japanese Utility Model Application Hei 4-68995 (JP, U) Japanese Utility Model Application Utility Model Hei 6-13489 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F26B 21/00 F26B 17/14

Claims (1)

(57) [Claims] 1. A cylindrical intake cylinder in which a number of air holes are formed in an outer peripheral portion and which is buried so that a base end is located on a surface side of a deposited grain layer and a distal end is located on a deep side of the grain layer. And a suction means connected to a base end side of the intake cylinder, for generating a negative pressure inside the intake cylinder to suck and exhaust air in the grain layer, An opening area of the vent hole per unit surface area of an outer peripheral portion of the intake cylinder is increased from a base end to a distal end of the intake cylinder.