JPS6018797Y2 - Hot air supply device in grain dryer - Google Patents

Description

[Detailed Description of the Invention] This invention aims to prevent extremely abnormal drying of grains and fires by preventing abnormally high temperatures in extremely localized areas within the hot air chamber 1.

Single-fan type grain dryers, which use a fan only on the exhaust side of the machine, have become mainstream in order to supply consumers with low prices and to improve dust prevention.

This single fan grain dryer does not have a fan on the burner side.

On the other hand, since the burner is installed on the lower wall of the wind turbine, there is a shadow area formed by the burner's legs, and this area becomes extremely hot.

As a result, the grains become partially overdried, causing shell cracking or deterioration in quality, and furthermore, this may cause a fire to occur in the dryer.

This idea solves this problem.

Hereinafter, one embodiment of this invention will be described in detail based on the drawings.

First, to explain its structure, Fig. 1 shows a grain dryer that has been partially cut out and broken.The upper part of the dryer is provided with a grain storage chamber 4, and the lower part is provided with a pair of left and right elongated grain dryers. The drying chambers are communicated with each other, and grains from the dryer are fed into the lower grain collecting chamber 5 little by little.

The left and right side walls of both drying chambers are each made of a mesh or a perforated plate, so that the drying chamber can be ventilated from side to side.

The hollow chamber formed between the front, rear, right and left drying chambers is configured as a hot air chamber 1, which generates drying air by mixing the hot air from the burner 3 and the suction air from outside by an exhaust fan (not shown). , the supply is made to pass through each drying chamber.

Therefore, while the grains flow down from the drying room to the grain collecting room 5 side, they are subjected to a drying effect by this drying air.

Further, the outer space of each drying chamber is communicated with each other to form an exhaust chamber (not shown), which collects the hot air that has passed through the drying chamber and discharges it to the outside of the machine using an exhaust fan.

Further, a lower helix 6 is installed in the lower part of the grain collection chamber 5 so as to face forward and backward, and is configured to transfer the dried grains to one side and then take them out of the machine.

The burner 3 is formed into a hollow shape with a primary air port 3g opened on the lower side, and has a leg portion 3 with an open upper end, and a lower end opening portion with the upper end of the leg portion 3. A hollow combustion cylinder 3d is connected to the opening and has an opening on the upper side opposite to the primary air port 3g.
and an exhaust gas 31 having two openings communicating with the opening on the negative side, an exhaust port 3a formed on the other side, and attached to the side wall of the combustion tube 3d.

A combustion plate 3b is provided inside the leg portion 3 and communicates with the paddy outlet of the fuel supply pipe 3C.

Reference numeral 3h denotes a secondary air supply hole formed in the upper side wall of the combustion tube 3d on the side opposite to the opening, that is, on the side opposite to the exhaust port 3a.

A wind cylinder 2 having a hollow interior and communicating with the hot air chamber 1 is attached to the outer wall of the grain dryer on one side of the hot air chamber 1.

A burner 3 is provided in the wind cylinder 2, with legs 3k attached to the lower wall 2a of the wind cylinder 2, and an exhaust port 3a opening toward the hot air chamber 1 at the center of the wind cylinder 2. ing.

The auxiliary air supply port 2C is provided on the lower wall 2a of the wind barrel 2 at a position below the exhaust port 3a of the burner 3.

Note that the auxiliary air supply port 2C may be configured to be openable and closable so that it can be used during high-temperature use such as when drying wheat.
Alternatively, it may be configured to be expandable and contractible so that it can be adjusted depending on the temperature.

In addition, a second auxiliary air supply port 2d is provided in the earthen wall of the wind cylinder 2, and the structure is such that the second auxiliary air supply port 2d is interlocked with the auxiliary air supply port 2C so that when one opens, closes, expands or contracts, the other operates in the opposite direction. Then, the airflow inside the wind barrel 2 can be adjusted, which is convenient.

Next, to explain its function, first, it drives each rotating part of the aircraft body.

Then, the exhaust fan causes outside air to flow into the wind cylinder 2 in the direction of arrow A in FIG. 2, that is, from the outer end of the wind cylinder 2 toward the hot air chamber 1 side.

Then, when the burner 3 is ignited, the fuel supplied onto the combustion plate 3b by the fuel supply pipe 3c is combusted in the thermal combustion cylinder 3d by the air supplied from the primary air supply port 3g,
The incomplete combustion part is combusted by the air supplied from the secondary air supply hole 3h, and becomes a high-temperature gas that is discharged into the wind barrel 2 through the exhaust port 3a.

Then, it mixes with the air flowing through the wind barrel 2, and on average about 6
Airflow at around 0°C is supplied to the hot air chamber 1.

Also, since air is drawn into the wind barrel 2 from the auxiliary air supply port 2c below the exhaust port 3a, the high-temperature gas mixes with air below the exit of the exhaust port 3a as well. As a result, the temperature of the hot air is made uniform, and local abnormally high temperature areas do not occur.

As explained above, in this invention, a wind cylinder 2 is connected to one side of a hot air chamber 1, and a burner 3 is attached to a lower wall 2a of the wind cylinder 2.
The burner 3 has an exhaust port 3a opened toward the hot air chamber 1, and an auxiliary intake port 2c is provided in the lower wall 2a of the wind cylinder below the exhaust port 3a of the burner 3. Because of this, it is possible to prevent the occurrence of a localized abnormally high temperature region at a position below the exhaust port 3a formed at one end of the exhaust pipe 31 of the burner 3, and it is a practical method that can prevent uneven drying of grains and the occurrence of fires. be effective.

[Brief explanation of the drawing]

The figures show an embodiment of this invention, in which FIG. 1 is a partially cutaway side sectional view of a grain dryer, and FIG. 2 is a side sectional view of a burner. 1...Hot air chamber, 2...Wind cylinder, 2a...
...Bottom wall, 2C...Auxiliary intake port, 3...
...burner, 3a... shows the exhaust port.

Claims (1)

[Scope of utility model registration request] A wind cylinder 2 is connected to one side of the hot air chamber 1, and a burner 3 is provided in the wind cylinder 2 so as to protrude upward from a lower wall 2a.The burner 3 has an exhaust port 3a facing the hot air chamber 1. A hot air supply device for a grain dryer, characterized in that an auxiliary intake port 2C is provided on the lower wall 2a of the wind barrel below the exhaust port 3a of the burner 3.