JPH079028Y2 - Ventilation duct for grain dryer - Google Patents

Description

[Detailed description of the device] "Industrial application field" The present invention is a compact ventilation duct,
Even if the air-drying cylinders have the same area, it is permissible to increase the number of hot air chambers and exhaust air chambers so that a rational ventilation effect can be achieved. TECHNICAL FIELD The present invention relates to a ventilation duct for a grain dryer, which is capable of effectively reducing a ventilation resistance in a window and efficiently performing a good grain drying operation.

"Conventional technology" Conventionally, inside the dryer body, from top to bottom, a tempering tank, a ventilation drying cylinder, and a take-out tank are three-dimensionally stacked in order, and hot air ventilation is provided inside the ventilation drying cylinder. The ducts and the ventilation ducts for exhaust air are vertically arranged alternately so that a drying passage is formed between both ventilation ducts, and a ventilation duct for hot air when the grains gravity-fallen from the tempering tank passes through the drying passages. A grain drying device which is dried by hot air flowing toward a ventilation duct for exhausting air is described in, for example, Japanese Patent Publication No. 48-36753 before this application and is known.

"Problems to be solved by the invention" By the way, the ventilation ducts used in this type of grain drying device are classified into two types, one for hot air and one for exhaust air. Since the ventilation ducts are alternately arranged so that a drying passage is formed between the ventilation ducts, when the ventilation ducts are installed in the ventilation drying cylinder, the space loss is large and the ventilation drying cylinder having the same area. Since it is not possible to install more ventilation ducts inside, and as a result, it cannot be expected to improve the drying capacity, the ventilation ducts were formed with the same width over the entire length, The amount of hot air blown out from the ventilation duct for hot air and the amount of air discharged from the ventilation duct for hot air are increased due to the increased ventilation resistance in the ventilation window opened on one side of the ventilation duct and the exhaust window opened on one side of the ventilation duct for exhaust air. Ventilation duct Since the amount of exhausted air entering is not uniform, there is a problem that uneven drying occurs.

The present invention divides the interior into a hot air chamber and an exhaust air chamber even with a single ventilation duct, so that the hot air and the exhaust air can be evenly distributed with less airflow resistance and space loss. The purpose is to obtain a ventilation duct for a grain dryer in order to improve the drying capacity by eliminating a large number of ventilation ducts and installing them in the ventilation drying cylinder.

[Means for Solving the Problems] In order to achieve the above object, in the ventilation duct for a grain dryer of the present invention, the configuration of the first item has a ventilation window on one side and an exhaust window on the other side. The open lateral ventilation duct is partitioned diagonally to the left and right by a partition plate and communicates with the ventilation window.One is connected to the hot air chamber that is gradually narrowed away from the ventilation window, and the other is connected to the ventilation window. It is formed by partitioning so that the width of the exhaust chamber gradually increases toward the exhaust window.
Further, in the structure of the second item, the ventilation window is formed on one side and the ventilation window is formed on the other side in a horizontally long shape, and the inside of the ventilation duct is divided into diagonally upper and lower parts by a downwardly inclined partition plate to form the ventilation window. The bottom part of the hot air chamber whose vertical height gradually decreases as it moves away from the ventilation window, and the upper part, which communicates with the exhaust window, gradually increases in vertical height as it approaches the exhaust window. It is a compartment formed in the exhaust chamber.

"Operation" Now, after filling a predetermined amount of grain in the tempering tank and the ventilation drying cylinder, the grains are intermittently caused to flow down along a plurality of drying passages formed between ventilation ducts, and at the same time hot air is blown from the blower window. To be blown into the hot air chamber under the condition that there is little resistance to blowing. By the way, the hot air is dried by taking hot air that is distributed evenly toward the exhaust chamber that is wider as it gets closer to the exhaust window from the hot air chamber that is narrower as it gets farther from the ventilation window,
After being dried, the exhaust hot air enters the exhaust air chamber in an equal amount and is exhausted to the outside from the exhaust window under the condition that the resistance to blowing is small.

Therefore, since a large number of ventilation ducts can be housed in the ventilation drying cylinder, it is possible to increase the drying capacity, or it is possible to apply hot air evenly to the grain under the condition that the ventilation resistance is low. Grains can be dried uniformly without causing uneven drying.

Further, according to claim 2, the hot air blown into the hot air chamber defined by the ventilation window under the ventilation duct under the condition that the ventilation resistance is small is evenly distributed toward the grain which is flowing down intermittently from the bottom. After being blown out and dried, it rises and is evenly distributed into the upper air exhaust chamber, and is exhausted under a condition where the air resistance is lower than that of the air exhaust chamber.

[Example] An example will be described with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a dryer main body having a horizontally long rectangular tube shape. Inside the dryer main body 1, grains exposed to hot air in the upper stage are given a standing period, and the grains themselves are A tempering tank 2 having a sufficient capacity to carry out the tempering operation, a ventilation drying cylinder 3 for blowing hot air to the grains dropped by gravity from the tempering tank 2 to dry in the middle stage, and a hot air blow to the lower stage for receiving the drying action. And the take-out tank 4 for collecting the grains are sequentially stacked three-dimensionally.

A plurality of ventilation ducts 5 ... Partitioned inside by the partition plate 6 so as to be divided into a hot air chamber 7 and an air exhaust chamber 8 by means of a drying passage 9 are provided inside the ventilation drying cylinder 3. I'm sorry.

The hot air chamber 7 is connected to a hot air generator 11 arranged on the front side of the dryer main body 1 via a ventilation window 10, and the exhaust air chamber 8 is connected to the dryer main body 1 via an exhaust air window 12. It is connected to the air exhaust device 13 arranged on the back side. It should be noted that the hot air chamber 7 and the exhaust window 12 having the ventilation windows 10 are provided on the left and right sides of the dryer body 1.
An exhaust chamber 8 is provided. Reference numeral 14 denotes a feeding roll which is rotatably mounted on the end side of the drying passage 9 so as to be rotatable.

The ventilation duct 5 minimizes the ventilation resistance in the ventilation window 10 and the exhaust window 12 and distributes the hot air or the exhaust hot air evenly over the ventilation surfaces 7 ', 8'of the hot air chamber 7 and the exhaust air chamber 8. For the purpose of being able to, the inside of the oblong ventilation duct 5 is divided by the partition plate 6 diagonally to the left and right to communicate with the ventilation window 10, and one side is gradually narrowed away from the ventilation window 10 to the hot air chamber 7. Further, the other side communicating with the air exhaust window 12 is formed in the air exhaust chamber 8 which is gradually widened toward the air exhaust window 12. Therefore, if the ventilation duct 5 as described above is vertically installed in sequence through the drying passage 9 so that the ventilation surface 7'of the hot air chamber 7 and the ventilation surface 8'of the exhaust chamber 8 face each other, it will flow down vertically. Hot air can be passed laterally through the grain to dry it.

Further, in order to achieve the above-mentioned object, the ventilation duct 5 is divided into diagonally upper and lower parts by a downward slanting partition plate 6 ', and communicates with the ventilation window 1 in order to achieve the above-mentioned object. The bottomless hot air chamber 7 ″, whose vertical height gradually decreases as the distance from the ventilation window 10 becomes lower, and the vertical height gradually increases as the upper part communicating with the ventilation window 12 approaches the ventilation window 12 It is possible to form a partition in the air exhaust chamber 8 "which is a surface 8 ', and at that time, hot air can be jetted downward from the bottom of the hot air chamber 7", or it can be jetted downward and then part of it is raised. It can be dried while being distributed to the air exhaust chamber 8 ″.

Therefore, the ventilation duct 5 described above is configured to be used properly according to the drying method.

"Effect of Invention" Since the present invention is configured as described above, it has the following effects.

In the ventilation duct according to claim 1, one of the ventilation windows is formed on one side, and the inside of the ventilation duct having a horizontally long shape with the exhaust window opened on the other side is diagonally divided by a partition plate so as to communicate with the ventilation window. The hot air chamber is gradually narrowed away from the air blowing window, and the other one communicating with the air exhaust window is divided into an air exhaust chamber that is gradually wider toward the air exhaust window. In order to improve the distribution of hot air and exhaust hot air by reducing the air flow resistance as much as possible, hot air is evenly distributed from the ventilation surface of the hot air chamber toward the ventilation surface of the exhaust chamber to prevent uneven drying. Meanwhile, the grain can be dried uniformly.

In addition to the above, in the ventilation duct of claim 2, hot air can be jetted along the grain flow direction,
The parallel drying work can be facilitated and the range of use of the dryer can be expanded.

[Brief description of drawings]

FIG. 1 is a partially cutaway vertical front view, FIG. 2 is a cross-sectional enlarged plan view of the ventilation duct, FIG. 3 is an enlarged vertical front view of the ventilation duct, and FIG. 4 is an enlarged vertical side view of the ventilation duct. FIG. 5 is a vertical sectional front view of a conventional grain dryer. 1 ... Dryer main body, 3 ... Ventilation drying cylinder, 5 ... Ventilation duct, 6 ... Partition plate, 6 '... Downwardly inclined partition plate, 7,7 "
...... Hot air chamber, 8,8 ″ …… Blower chamber, 9 …… Dry passage, 10…
… Blower window, 12 …… blower window

Claims (2)

[Scope of utility model registration request] 1. A ventilation window on one side and an exhaust window on the other side, and the inside of a ventilation duct having a horizontally long shape is diagonally divided by a partition plate so that one side communicating with the ventilation window is separated from the ventilation window. A ventilation duct for a grain dryer, which is divided into a hot air chamber with a gradually narrower width, and an air exhaust chamber with the other that communicates with the air exhaust window gradually becoming wider toward the air exhaust window. 2. The inside of a horizontally long ventilation duct having a ventilation window on one side and an exhaust window on the other side is vertically divided by a downwardly inclined partition plate, and a lower portion communicating with the ventilation window is blown. Divided into a bottomless hot air chamber whose vertical height gradually decreases as it moves further away from the window, and an upper and lower ventilation chamber that communicates with the exhaust window gradually increases in height as it approaches the exhaust window. The formed ventilation duct for a grain dryer according to claim 1.