JPH0295608A - Grain tank - Google Patents

Abstract

PURPOSE:To prevent the dew condensation on the attic of a tank by providing a chimney, in a grain tank, for cooling the grain after the thermal power drying and performing the cooling of the grain layer and the humidity conditioning of the space in the upper part of the tank with a suction fan installed at the upper end of the chimney. CONSTITUTION:At the time of performing the cooling and the storage of the grain in a tank main frame 1, when the outside humidity is low, a switching valve 9 is switched to the condition that the full line shows, and the outside air is sucked into the tank main frame 1 through a ventilation opening 6 by the work of a suction fan 4 and the outside air permeates the grain layer G and flows into a chimney 2 and is exhausted from a discharge opening 40 so as to perform the cooling and the ventilation of the grain. And the air of the space W falls down to the top surface of the grain layer G with the work of the suction pressure of the fan 4, the dew condensation on the inner surface of a roof 10 generated by the outside air flowing from the ventilation opening 6 is prevented by the ventilation. Next, when the humidity of the outside air is high, the switching valve 9 is switched to the condition that the two-dot long and two short dashes line shows, the suction pressure of the fan 4 is shut against the lower end of the chimney 2, and the ventilation of the space W is performed so that the dew condensation of the roof part 10 is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a grain tank in which the loaded grains can be ventilated by the operation of a fan.

As a grain tank A for cooling grains dried by fire using a grain dryer and for storing grains,
As shown in Fig. 1, an exhaust pipe 2 with a length corresponding to the vertical height of the inner cavity of the tank body 1 is placed in the inner cavity of the tank body 1 in a position where the axial direction of the exhaust pipe 2 is in the vertical direction. The upper end side of the exhaust pipe 2 is connected to the suction fan 4 whose discharge port 4o communicates with the outside of the tank body l through an exhaust duct 5. It communicates with the port 41, and on the lower end side of the exhaust pipe 2,
The cylindrical wall 20 on the lower half side of the part buried in the sedimentary layer G of grains spread inside the tank body 1.

By forming the partition wall to be air permeable, the outside air sucked into the tank body l from the vent hole 6 by the operation of the suction fan 4 can remove the grain accumulation layer G accumulated inside the tank body l. As shown by the double-lined arrow, it passes through and is collected in the exhaust pipe z, and flows from the discharge port 40 of the suction fan 4 to the exhaust duct 5.
This type of grain tank A has a grain tank in which the grains are discharged outside of the machine through When the grains are piled up to a predetermined stacking height from 7 and left to cool or stored by operating the suction fan 4, if the humidity of the outside air is high, the moisture in the outside air that passes through the grain layer G will dry the grains. Now that grains are humidified, the drying effect is reduced when grains are left to cool after being dried in a grain dryer.
In addition, in the case of grain storage, there is a problem that deterioration occurs, and the air in the space above the grain layer G stretched inside the tank body l is exposed to the inner surface of the roof part 10 of the tank body l. There is a problem in that the moisture condenses and drips onto the grain layer G, causing local deterioration of the grain.

By the way, the problem of humidifying grains by taking in high humidity outside air can be solved by, for example, installing a humidity sensor in the vent 6 that takes in outside air, so that the humidity of the outside air taken in is kept at a constant humidity. This can be prevented by controlling the operation of the suction fan 4 motor to stop at times, but if this is done, the temperature inside the tank body 1 will rise due to the heat of the grains, causing the roof to deteriorate. Since the dew condensation on the inner surface of the portion 10 becomes even more serious, dew condensation cannot be prevented unless other means are taken.

The present invention was made in order to solve the problems occurring in the grain tank of the above-mentioned form, and it is possible to humidify the grain when the outside air is humid and to improve the humidity of the tank body.
It is an object of the present invention to provide a new means for effectively preventing dew condensation from occurring on the inner surface of the roof portion 10 of the present invention.

In the present invention, as a means for achieving this object, a vertical exhaust pipe is disposed inside the tank body, and a suction fan having a discharge port communicating with the outside of the tank body at the upper end side of the vertical exhaust pipe is provided. The suction port of the exhaust pipe is connected to the cylinder wall of at least the lower half of the part of the exhaust pipe that is immersed in the grain layer spread in the tank body, and the cylinder wall of the part of the exhaust pipe on the lower half side is made into an air permeable partition. An intake port that communicates with the space above the grain layer inside the tank body is provided in a portion that projects upward, and an on-off valve that controls opening and closing of communication with the space above the grain layer is provided at the intake port. A grain tank is provided in which a tank body is provided with a communication port that communicates the space above the grain layer with the outside.

Next, embodiments will be described in detail with reference to the drawings. Note that the same reference numerals in the drawings as in the previous means are used for components having the same effect.

FIG. 2 is a vertically sectional front view of a grain tank A in which the present invention can be implemented, and in the same figure, l represents the tank body.

2 is a vertical exhaust pipe arranged inside the tank body 1.

Reference numeral 4 denotes a suction fan with a suction port connected to the upper end of the exhaust pipe 2, G represents a grain layer stretched into the tank body 1, and 20 represents the lower end of the exhaust pipe 2 immersed in the grain layer G. A cylindrical wall 8 consisting of an air-permeable partition formed in the exhaust pipe 2 is opened at a portion of the exhaust pipe 2 that projects upward from the upper surface of the grain bed G so as to communicate with the space W above the grain bed G. An intake port, 9 is an on-off valve provided to open and close the intake port 8, and 6 is a vent provided in the tank body 1 so as to communicate the space W above the grain layer G with the outside.

The tank body 1 is made of a normal steel plate and has a cone-shaped roof part 10 and a hopper-shaped bottom part 11. The cone-shaped roof part 10 has a charging tube that serves as an input port for grains to be charged into the tank. 7 is provided to penetrate through the roof portion 10, and a discharge port 13 closed by an opening/closing shutter 12 is installed at the lower end of the hopper-shaped bottom portion 11.

Further, the circumferential wall 14 of the tank body 1 is provided with a viewing window 15 through which the level of grains to be charged from the charging cylinder 7 can be checked.

A vertical exhaust pipe 2 disposed inside the tank body 1 is formed to have a length corresponding to the vertical height of the inner cavity of the tank body 1, and is located at the center of the inner cavity of the tank body 1. The tank body 1 is supported in a suspended state by a chain-shaped support member 3. A plurality of exhaust pipes 2 may be arranged in parallel, or may be connected to and integrally supported by the roof 10 of the tank body 1.

A bow fan 4 with a suction port 41 connected to one end of the exhaust pipe 2
is a normal sirocco fan, which is installed inside the tank main body l by integrally assembling it at the upper end of 8% m2, and the exhaust duct 5 connected to its discharge port 40 is connected to the tank body l. The discharge port is communicated with the outside of the tank body 1 by penetrating the roof portion 10 of the main body 1 and protruding to the outside. When the upper end side of the exhaust pipe 2 penetrates the roof 10 of the tank body 1 and protrudes to the outside, the suction fan 4 is connected to the exhaust pipe 2 outside the tank body 1! In this case, the exhaust duct 5 connected to the outlet 40 of the suction fan 4 may be omitted.

In addition, a cylinder wall 2 consisting of an air permeable partition wall on the lower end side of the exhaust pipe 2 is provided.
0 is a perforated plate, which is located on the lower half side of the exhaust pipe 2, approximately in the middle of the part that will be buried in the grain layer G when the grains are stretched to a specified level in the tank body L. Although it is installed below the position, the relationship with the suction pressure of the suction fan 4,
In addition, as shown by the chain line in FIG. 2, in relation to the flange-shaped shield plate a provided at the part that contacts the upper surface of the grain layer G and surrounds the exhaust pipe 2, an appropriate range is provided. established in

The intake port 8 provided in the part of the exhaust pipe 2 that protrudes above the grain layer G is located somewhat above the level of the grain layer G when a specified amount of grains are filled into the tank body 1. At the close position, it is opened toward the opposite side to the above-mentioned charging cylinder 7, and a tool 80 is provided to prevent grains thrown from the charging cylinder 7 from flying in.

The on-off valve 9, which opens and closes the intake port 8, rotates around the rotating shaft 90 to open the intake port 8 by cutting off communication between the lower half of the exhaust pipe 2 and the suction fan 4, as shown in FIG. It is formed in the shape of a switching valve to switch between the state and the state in which the intake port 8 is connected to the lower half of the exhaust pipe 2 and the suction fan 4 as shown in FIG. By transmitting power to a manual lever remotely operated via a transmission mechanism or the output shaft of a motor, the switch is rotated by remote manual operation or control of motor operation to perform switching operation. Further, the switching operation of the on-off valve 9 is performed by installing a humidity sensor inside the hood 80 or at the vent 6 provided in the tank body 1 to detect the humidity of the air sucked into the intake port 8. The operation controls the circuit of the motor that drives the rotating shaft 90, and when the humidity exceeds the desired set humidity, it operates so that the state shown in Fig. 3 is reached, and when the humidity drops below the set humidity. In some cases, automatic control may be performed to switch to the state shown in FIG. 4.

The vent hole 6 provided in the tank body 1 is a space W in the tank body 1 that is formed above the upper surface of the grain layer G when a specified amount of grains are put into the tank body 1. Although it is sufficient if it is provided in a position that communicates with the tank body 1, it is preferable to provide it in a position close to the roof portion 10 of the tank body 1, as shown in the example shown in FIG.

Note that the vent 6 is provided outside the vent 6 communicating with the space W above the grain layer G in the tank body l, as shown in FIGS. 5, 6, and 7. 1 is provided with an auxiliary ventilation port 6a at the bottom of the exhaust pipe 2.
The grains in the exhaust pipe 2 are made to flow from the lower surface side of the grain layer G through the grain layer G into the part of the pipe 120 made of an air-permeable partition wall on the lower end side. The vertical length of the exhaust pipe 2 may be shortened by reducing the depth of immersion into the layer G.

The thus constructed embodiment apparatus operates as follows.

When the grains are placed in the tank body 1 and are cooled or stored by operating the suction fan 4, when the humidity of the outside air is low, the on-off valve 9 is switched to the state shown in FIG. 4.

As a result, by operating the suction fan 44, outside air is sucked into the tank body l from the first vent 6 (when the auxiliary vent 6a is provided, the vent 6 and the auxiliary vent 6a), and the grains M
It passes through the grain layer G, flows into the exhaust pipe 2, and is discharged from the outlet of the suction fan 4 to the outside of the tank body l.The outside air that passes through this grain layer G allows the grains to be cooled or aerated. At the same time, the suction pressure of the suction fan 4 acts on the entire upper space W in the tank body 1, so that the air inside the roof 1O of the tank body 1 is directed toward the upper surface of the grain layer G. A part of the outside air that descends and flows into the space W from the vent 6 flows toward the inside of the roof section 10.
The air inside the roof section 10 is ventilated and the roof section 1
o Prevents condensation from forming on the inner surface.

Next, when the humidity of the outside air is high, the on-off valve 9 is
Switch to the state shown in the figure.

As a result, the suction pressure that acts inside the exhaust pipe 2 due to the operation of the suction fan 4 is blocked from the lower end side of the exhaust pipe 2, and acts only on the space W above the grain layer G through the intake port 8. I come to do it.

Therefore, the outside air no longer flows in through the auxiliary vent 6a, and the outside air flows into the space W above the grain layer G only through the first vent 6, and the outside air is sucked into the exhaust pipe 2 through the intake port 8, and the suction fan 4 is discharged to the outside of the tank body 1, the flow of air passing through the grain layer G disappears, and only the space W above the grain layer G is ventilated. This prevents the grains from being humidified, and the roof part 10
As explained above, the grain tank according to the present invention has a vertical exhaust pipe disposed inside the tank body and a discharge port at the upper end of the tank body. A suction port of a suction fan that communicates with the outside of the tank body is connected, and the cylindrical wall on at least the lower half side of the part of the exhaust pipe that is immersed in the grain layer spread inside the tank body is made into a breathable partition, An intake port that communicates with the space above the grain layer inside the tank body is provided at a portion of the exhaust pipe that projects above the grain layer, and the intake port is connected to the space above the grain layer. An on-off valve is provided to control the opening and closing of communication with the space, and the tank body is equipped with a communication port that communicates the space above the grain layer with the outside, so when the humidity of the outside air is high. This makes it possible to effectively prevent dew condensation from forming on the inner surface of the roof of the tank body, while preventing moisture from forming on the grains.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the conventional means, Fig. 2 is a longitudinal sectional front view of a grain tank in which the present invention can be implemented, Figs. 6 and 7 are longitudinal sectional front views of parts of different embodiments, respectively. Explanation of drawing symbols A...Grain tank G...Grain layer W...
Space a...Shielding board ■...Tank body 10...Roof part 11...Bottom part
12...Opening/closing shutter 13...Discharge port
14... Trunk wall 15... Peephole?
...Exhaust tube 20...Cylinder wall 3...Support member 4...Suction fan 40...Discharge port 41...Suction port 5...Exhaust duct 6.
...Vent 6a...Auxiliary ventilation lower...
・Insertion cylinder 8...Intake port 80...Hood 9...Opening/closing valve 90...Rotating shaft

Claims (1)

[Claims] (1) A vertical exhaust pipe is installed inside the tank body,
A suction port of a suction fan whose discharge port communicates with the outside of the tank body is connected to the upper end side of the exhaust pipe, and at least the lower half of the exhaust pipe is immersed in the grain layer spread inside the tank body. The wall is a breathable partition, and an intake port is provided in a part of the exhaust pipe that projects above the grain layer to communicate with the space above the grain layer inside the tank body. A grain tank comprising: an on-off valve for controlling opening/closing of communication with the space above the grain layer; and a communication port provided in the tank body for communicating the space above the grain layer with the outside.