JPH1068589A - Grain dryer - Google Patents

Abstract

(57) [Summary] [Purpose] Dry air is passed from the center of the drying section to both sides of the drying section to eliminate the influence of the outside air temperature and ensure thermal efficiency, but still have a problem of dust and other shelves. Provided is a grain dryer capable of preventing accumulation on a plate. A hot-air supply chamber is surrounded by a pair of grain drying units and disposed substantially at the center of the dryer body.
Are provided with shielding plates 18, 18 for shielding the exhaust chambers 8, 8 and the grain collection chamber 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grain dryer for circulating and drying grains, and more particularly, to a structure of a grain dryer in which dust (dust) generated during grain drying does not stay inside the grain dryer.

[0002]

2. Description of the Prior Art FIGS. 3 and 4 show a conventional grain dryer.
This will be described below. The grain dryer includes a grain storage tank 2 at an upper part and a dryer body 1 at a lower part, and a pair of grain drying units 4 and 4 for drying the grains while flowing down the grains from the storage tank 2. Is provided in the dryer main body 1 and a hot air supply chamber 6 connected to the heat source unit 3 adjacent to the grain drying units 4 and 4.
And an exhaust chamber 8 connected to an exhaust fan 9, and a grain collecting chamber 2 is provided below the grain drying units 4 and 4.
1 and a lower conveying device 1 provided at the bottom of the grain collection room 21.
4 and the storage tank 2 are communicated via a fryer 5.

[0003]

In the above-mentioned conventional grain dryer, since the exhaust air chamber 8 and the grain collection chamber 21 communicate with each other, the following steps are performed at the time of setting the grains and drying the grains. Problems arise.

[0004] That is, referring to the setting of the grain, the setting of the grain is performed from the opening 19 provided on the side of the dryer main body 1, and the grain is inclined in a funnel shape in the grain collecting chamber 21. After sliding on the shelf 13, it reaches the lower transfer device 14. Then, the grains are stored in the storage tank 2 from the lower transport device 14 via the grain raising machine 5 and the upper transport device 16.
At this time, the sticking is performed while driving the suction fan 9 so as not to deteriorate the working environment. However, since the opening 19 communicates with the outside, turbulent flow occurs on the shelf 13 on the opening 19 side. As a result, the light dust contained in the grain is not smoothly sucked by the suction fan 9, and remains at the corner of the shelf 13.

[0005] Also, when the grain is dried,
During drying, the grains drop intermittently from the grain drying units 4 and 4 into the grain collection chamber 21 and generate dust when transported by the lower transport device 14. The approach is
A wind in a direction opposite to the conveying direction is flowing in from the receiving port 25 of the grain raising machine 5, and the dust winds up the wind and the shelves 13.
Are left in the corners of the.

As a countermeasure, it is conceivable to change the direction of the suction air or the drying air as shown in FIG. In other words, this is a method in which dry air is blown from the exhaust air chamber 8, passes through the grain drying section 4, passes through the hot air supply chamber 6, and is discharged outside the machine.
In this way, dust and the like can be stored on the shelf
This is very effective because the amount remaining in the substrate can be greatly reduced. However, in this method, it is necessary to divide the hot air equally into the left and right exhaust chambers 8, 8, but most of the burner device 3 as the heat source is a single unit. In order to evenly distribute the drying air on both sides, it is necessary to widen the burner box 24 to facilitate the flow of the drying air, so that the dryer main body 1 becomes relatively large. Further, since the drying air flows through the exhaust chambers 8 and 8 first, the drying air is susceptible to the influence of the outside air temperature, and the thermal efficiency is reduced unless appropriate measures are taken against heat insulation.

[0007] From the above, the drying air is passed from the center of the drying section to both sides of the drying section to eliminate the influence of the outside air temperature and secure the thermal efficiency, but also to prevent the shelf board of dust and the like which has been a conventional problem. It is an object of the present invention to provide a grain dryer capable of preventing the accumulation on the grain.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a grain storage tank at an upper part and a dryer main body at a lower part, and drying while allowing the grains to flow down from the storage tank. A pair of grain drying units to be provided in the dryer main body, a hot air supply chamber connected to a heat source unit adjacent to the grain drying unit, and an exhaust chamber connected to an exhaust fan are provided, respectively. A grain collection room is provided below the grain drying section,
In a grain dryer in which a lower conveying device provided at the bottom of the grain collection chamber and the storage tank are connected via a graining machine, the hot air supply chamber is surrounded by the pair of grain drying units. Technical measures were taken to dispose it at a substantially central part of the dryer main body, and to provide a shielding plate for shielding (shielding) the exhaust chamber and the grain collecting chamber in the exhaust chamber.

[0009] Further, an opening into which the grains are stuck is provided on a side portion of the dryer body, and an opening / closing plate for opening and closing the opening is provided. The opening and closing plate and the shielding plate may be interlocked and connected so that the exhaust room and the grain collection room communicate with each other.

[0010]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a partial longitudinal sectional view showing the structure of a grain dryer according to the present invention, and FIG. 2 is a partially enlarged sectional view showing one embodiment of an interlocking mechanism of an opening / closing plate and a shielding plate.

The main structure of the grain dryer of the present invention is the same as that of a conventionally known circulation type grain dryer. The outline of the circulation type grain dryer is described with reference to FIGS. explain. 3 and 4, the grain dryer includes a grain storage tank 2 provided at an upper portion and a dryer main body 1 provided below the storage tank 2. A pair of grain drying sections 4 for drying the grains while flowing them down from the storage tank 2, and a heat source section 3 adjacent to the grain drying sections 4.
And a hot air supply chamber 6 connected to the exhaust air fan 9 are provided.

A grain collecting chamber 21 is provided below the grain drying section 4, and a lower conveying device 14 provided at the bottom of the grain collecting chamber 21.
Communicates with the storage tank 2 via the graining machine 5 to form a circulating grain process. The grain drying section 4 forms a portion through which hot air passes on a gas-permeable mesh plate in order to dry the grains while flowing down the grains from the storage tank 2.

The lower ends of the grain drying unit 4 are joined to each other, and a long discharge valve 10 for intermittently feeding the grain from the grain drying unit 4 is provided at the joint. The discharge valve 10 has a notch 11 over the entire length, and when the discharge port 12 of the drying unit 4 and the notch 11 coincide with each other, the grains flow into the discharge valve 10, and rotate into the grain collection chamber 21 by rotating the discharge valve 10. Is discharged.

A shelf 13 inclined in a funnel shape is provided in a grain collecting chamber 21 below the discharge valve 10, and a lower screw 14 as a lower conveying device is horizontally provided at the bottom of the shelf 13. doing. The conveying end of the lower screw 14 is protruded forward of the dryer main body 1, is connected to the graining machine 5, and is connected to the storage tank 2. A downflow gutter 15 is connected to the upper part of the grain raising machine 5, and is branched from the downflow gutter 15 to an upper screw 16 as an upper conveyance device and a grain discharge path 17 via a switching valve (not shown). .

Next, a shielding plate according to the present invention will be described with reference to FIGS. In the grain dryer of the present invention, the hot-air supply chamber 6 is surrounded by a pair of grain drying units 4 and is disposed substantially at the center of the dryer main body 1. This is provided with a shielding plate 18 for shielding the grain collecting room 21.
In addition, the shielding plate 18 is provided in the exhaust chambers 8 on both sides of the dryer body 1.
8, a shield plate that shields the exhaust side of the grain drying unit 4 and the lower transport device may be provided in the case where the grain drying unit 4 has one grain downflow layer. .

An opening 19 into which grains are inserted is provided on a side portion of the dryer main body 1 and an opening / closing plate 20 for opening / closing the opening 19 is provided. The opening / closing plate 20 and the shielding plate 18 may be interlocked and connected so that the plate 18 opens and the exhaust chamber 8 and the grain collection chamber 21 communicate with each other. FIG. 2 shows an embodiment of an interlocking mechanism between the opening / closing plate 20 and the shielding plate 18, wherein reference numeral 22 denotes an interlocking wire, and reference numeral 23 denotes a pulley. One end of the interlocking wire 22 is connected to the opening / closing plate 20, the other end is connected to the shielding plate 18, and the middle part is bridged over the pulley 23.

Next, the operation of the above embodiment will be described.

When the grains are applied from the side of the dryer main body 1, the suction fan is driven in advance to collect dust, so that the working environment is not deteriorated. When the opening / closing plate 20 provided on the side wall 7 of the dryer main body 1 is pulled toward the user in this state, the opening 19 is opened, and the interlocking wire 22 is tensioned, so that the shielding plate 18 is pulled up. Then, the undried grains are introduced from the opening 19. When the undried grains are dropped onto the shelf 13 in the grain collection chamber 21, the heavy grains slide on the shelf 13 to the lower screw 14. When the dust arrives, the light dust and the like are smoothly sucked in the direction of the suction fan 9 and discharged outside the machine.

Next, the sticking is finished and drying is performed. When the opening / closing plate 20 is closed, the tension of the interlocking wire 22 is released, the shielding plate 18 is closed downward by its own weight, and the grain collecting chamber 21 and the exhaust air The room 8 is partitioned. This allows
The flow of the air between the grain collection chamber 21 and the air discharge chamber 8 is blocked, and there is no negative pressure except for the drying part due to the suction of the suction fan 9. In particular, the lower screw 14 is connected to the receiving port 25 of the graining machine 5.
Since the air path flowing to the shelf 13 can be blocked, dust does not float from the lower screw 14 to the shelf 13 and accumulate.

The interlocking of the open / close plate 20 and the shield plate 18 means that the open / close operation of the open / close plate 20 causes the shield plate 18 to open or close. However, the present invention is not limited to this, and another interlocking mechanism may be provided. Further, other than the side portion of the dryer main body 1 (for example,
When the grain is loaded from the fryer 5), there is no need to link the opening / closing plate 20 and the shielding plate 18. Further, the shielding plate 18 is not limited to the opening and closing door type, but may be a sliding type.

[0022]

As described above, according to the present invention, the hot-air supply chamber is disposed substantially at the center of the dryer body, surrounded by the pair of grain drying sections. Since a shielding plate is provided to shield the air chamber and the grain collection chamber, the drying air is passed from the hot air supply chamber located in the center of the dryer main body to the exhaust air chambers located on both sides of the dryer main body. While the thermal efficiency is ensured by eliminating the influence of the above, the shielding room and the exhaust chamber are shut off by the shielding plate, so that it is possible to prevent the accumulation of dust and the like on the shelf.

[0023] Further, an opening into which grains are stuck is provided on a side portion of the dryer main body, and an opening / closing plate for opening / closing the opening is provided. The opening / closing plate opens and the shielding plate opens and moves. Since the air discharge chamber and the grain collection chamber communicate with each other, it is possible to open the shielding plate at the time of inserting the grain and put the grain into the transport unit, and close the shielding plate at the time of drying the grain. To improve the drying efficiency and the dust absorption efficiency.

[Brief description of the drawings]

FIG. 1 is a partial longitudinal sectional view showing a configuration of a grain dryer of the present invention.

FIG. 2 is a partially enlarged cross-sectional view showing an embodiment of an interlocking mechanism of an opening / closing plate and a shielding plate.

FIG. 3 is a longitudinal sectional view of a drying unit in which a part of a conventional drying unit is omitted.

FIG. 4 is a plan sectional view of a drying unit in which a part of a conventional drying unit is omitted.

FIG. 5 is a plan sectional view of a drying unit in which a part of a conventional drying unit is omitted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dryer main body 2 Storage tank 3 Heat source part 4 Kernel drying part 5 Graining machine 6 Hot air supply chamber 7 Side wall 8 Air exhaust chamber 9 Air exhaust fan 10 Discharge valve 11 Notch 12 Discharge port 13 Shelf board 14 Lower screw 15 Downspout gutter Reference Signs List 16 Upper screw 17 Grain discharge passage 18 Shielding plate 19 Opening 20 Opening / closing plate 21 Grain collecting room 22 Interlocking wire 23 Pulley 24 Burner box 25 Receiving port

Claims (2)

[Claims] 1. A grain storage tank is provided at an upper portion, and a dryer body is provided at a lower portion, and a pair of grain drying units are provided in the dryer body for drying the grains while flowing down the grains from the storage tank. A hot air supply chamber connected to a heat source unit adjacent to the grain drying unit, and an air exhaust chamber connected to an exhaust fan are provided, and a grain collecting chamber is provided below the grain drying unit, In a grain dryer in which a lower conveying device provided at the bottom of the grain collection room and the storage tank are connected via a graining machine,
The hot-air supply chamber is disposed at a substantially central portion of the dryer body so as to be surrounded by the pair of grain drying units.
A grain dryer comprising a shielding plate for shielding the exhaust chamber and the grain collecting chamber. 2. An opening for inserting grains is provided on a side of the dryer body, and an opening and closing plate for opening and closing the opening is provided. The opening and closing of the opening and closing plate causes the shielding plate to open and move. 2. The grain dryer according to claim 1, wherein the opening / closing plate and the shielding plate are interlocked and connected so that the exhaust chamber and the grain collecting room communicate with each other. 3.