JP2002228355A - Grain dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grain dryer which prevents the temperature of a lateral wall thereof from becoming high and which utilizes the air used for cooling so as to dry grains and thereby uses heat effectively. SOLUTION: The dryer has a reservoir chamber 3, a drying chamber 4, a grain collecting chamber 5, a hot air chamber 6, an air discharge chamber 7, etc., inside a machine body. A far infrared ray radiator 15 of which the beginning end side is made to face a combustion device 16, and the terminal side disposed opposite to the rear wall surface of the dryer is provided in the grain collecting chamber 5. The radiator 15 is heated by the combustion device 16, and grains are dried by far infrared rays radiated from the radiator 15 and hot air produced by the combustion device 16. A plurality of air intakes 17 communicating with the outside of the machine are provided in the wall surface of the lower part of a machine frame, and they communicate with an air passage 21 formed by a slanting plate 19 forming the grain collecting chamber 5 and by an outer plate 20 of the slanting plate spaced at a prescribed distance from the slanting plate 19. The air taken into the hot air chamber 6 from the air intakes 17 and used for cooling is discharged from openings 18 provided in a lateral plate that is positioned apart from the part wherein the grains flow down and that forms the grain collecting chamber 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a grain dryer provided with a far-infrared radiator.

[0002]

2. Description of the Related Art A circulation type grain dryer for drying grains by supplying hot air while circulating in the machine has been well known. Further, a far-infrared radiator disposed so that the start end faces the combustion device and the end side is opposed to the rear wall surface of the dryer is provided in a grain collection room or a hot air chamber, and the far-infrared radiator is heated by the combustion device. There is known a grain dryer in which grains are dried by far infrared rays emitted from a far infrared radiator and hot air from a combustion device. However, in the case of a grain dryer equipped with the above-mentioned conventional far-infrared radiator, the side wall of the machine is likely to be heated to a high temperature, causing distortion by heat. Of course, a method using a heat insulating material (for example, Japanese Patent Laid-Open No. 9-8945)
No. 3), but the cost is high. It is also known to use outside air for heat insulation.However, if the air used for heat insulation is directly discharged to the outside of the machine, heat will be discharged together with it. Not lead to a rise in the surrounding temperature.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to prevent the side wall of a dryer from becoming high in temperature and use it for cooling. An object of the present invention is to provide a grain dryer in which air is used for drying grains so that heat can be effectively used.

[0004]

In order to achieve the above object, the invention of claim 1 provides a storage room 3, a drying room 4, a grain collection room 5, a hot air room 6, an exhaust air room 7, etc. inside the body. And a far-infrared radiator arranged so that the start end faces the combustion device and the end end faces the rear wall surface of the dryer.
In a grain dryer that heats the far-infrared radiator by the combustion device and dries the grains by far-infrared radiation emitted from the far-infrared radiator and hot air from the combustion device, A plurality of intake ports 17 communicating with the outside of the machine are provided, and the intake port 17 is provided with a side plate 19 forming the grain collecting chamber 5 and another side plate 2 having a predetermined distance from the side plate 19.
It is configured to communicate with the space formed by the zero. The invention according to claim 2 is characterized in that the storage chamber 3,
A far-infrared radiator having a drying chamber 4, a grain collection chamber 5, a hot air chamber 6, an exhaust air chamber 7, etc., with the start end facing the combustion device and the end facing the rear wall of the dryer. Is provided in the grain collecting chamber 5 or the hot air chamber 6, the far-infrared radiator is heated by the combustion device, and the grain is dried by the far-infrared ray emitted from the far-infrared radiator and the hot air from the combustion device. In the dryer, a plurality of intake ports 17 communicating with the outside of the machine are provided on the lower wall surface of the machine frame, and the intake ports 17 are provided with a side plate 19 forming the grain collection chamber 5 and a gap at a predetermined distance from the side plate 19. The side plate 19 which communicates with the space formed by the other side plate 20 and is located at a position distant from the lower part of the grain and forms the above-mentioned grain collecting chamber 5
Through the opening 18 provided in the hot air chamber 6
It is configured to discharge more inhaled air.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a grain dryer according to the present invention. FIG. 1 is a sectional view as viewed from the front, and FIG. 2 is a side sectional view thereof. The grain dryer 1 shown here is a circulation type dryer for drying grains, and has a box shape as a whole. Inside the machine frame 2, a storage room 3, a drying room 4, It has a grain chamber 5, a hot air chamber 6, an exhaust air chamber 7, and the like. The storage room 3 is located near the middle stage in the machine, and the grains circulating in the machine are supplied to the storage room 3 from above. The drying room 4 is located below the storage room 3 and air is passed through the hot air to dry the grains in the drying room. In the grain collecting chamber 5, the grains fed from the drying chamber 4 by the rotary valve 8 are collected by the lower feed spiral 9 while flowing down. The grain collection room 5 and the drying room 4 communicate with each other via a hot air room 6. That is, although the grain collection room 5 and the hot air room 6 are not particularly partitioned, the drying room 4
A space close to the hot air chamber 6 and a space below the rotary valve 8 on the side of the feed spiral 9 constitute the grain collecting chamber 5. The hot air that has passed through the drying chamber 4 and has been used for drying the grains is discharged to the outside through the exhaust air chamber 7. Further, a moisture meter (not shown) for detecting moisture in the grain and a combustion device 16 for generating hot air are provided. The combustion device 16 has a burner inside,
A fan rotated by a motor.

[0006] In such a configuration, the grain dryer 1 has a rotary valve 8 rotatably arranged in the longitudinal direction of the machine body, while passing hot air generated by the combustion device 16 into the drying chamber 4 to keep grains constant. The grains are fed out in increments, and the fed grains are transported by a feed spiral 9, the collected grains are transported upward by a fry elevator 10, further transported to the center by a horizontal spiral 12, and This is a circulation type grain dryer in which grains are dried while being circulated so as to be supplied into the storage chamber 3. And a grain collecting room 5 and a drying room 4
The hot air is divided into a center and an outside of the hot air chamber 6 and sent to the drying chamber 4 by the flow of air in the grain collecting chamber 5. The lower arrow in FIG. 1 indicates the direction of the main flow of hot air. Reference numeral 13 denotes an exhaust fan disposed behind the exhaust chamber 7. Reference numeral 14 denotes a grain inlet.

Further, a far-infrared radiator 15 is disposed at a central portion of the machine in the grain collecting room 5 such that the start end faces the combustion device 16 and the end end faces the rear wall surface of the dryer. ing. The far-infrared radiator 15 is formed in a cylindrical or polygonal shape whose surface is coated with a black far-infrared paint,
The tip of the exhaust hole 15b has a tapered shape, and the peripheral surface of the tip has holes 15a and 15
a, ... are formed. And the far-infrared radiator 15
Is heated by the combustion device 16 so that the far infrared rays emitted from the far infrared radiator 15 and the combustion device 1
The grains are dried by the hot air according to (6).

FIG. 3 is a perspective view showing a structure near an inclined plate forming a grain collecting room, and FIG. 4 is a side sectional view thereof. A plurality of intake ports 17 communicating with the outside of the machine are provided on the front wall surface 2a at the lower portion of the machine frame 2, and the intake ports 17 are provided on the inclined plate 1 forming the grain collecting chamber 5.
9 and an inclined plate outer plate 20 provided with a gap of a predetermined distance from the inclined plate 19. Further, a plurality of outlets 23 are provided on the rear wall surface 2b opposed to the intake port 17 with the ventilation path 21 interposed therebetween, and are further away from the lower part of the grain flow from the rotary valve 8. Similarly, a plurality of openings 18 are provided at a position above the discharge port 23 on the rear wall surface 2b forming the grain collecting chamber 5. The outlet 23 and the opening 18 communicate with each other through a duct 22. Then, the air sucked from the intake port 17 is discharged from the discharge port 23 through the ventilation path 21, and is sent into the hot air chamber 6 from the opening 18 through the duct 22. In this way, the air used for cooling is heated and can be used for the dry air of the grain, so that the far-infrared radiator 15 cools the high temperature portion of the machine frame to prevent distortion due to heat. Effective use of heat. In addition, since it is not necessary to use an expensive heat insulating material, the cost can be reduced. Further, the sound of the grains falling from the rotary valve 8 onto the inclined plate 19 is shielded by the double wall formed by the inclined plate 19 and the inclined plate outer plate 20, which has an effect of reducing noise.

Next, the configuration of the rotary valve 8 will be described. This rotary valve 8 continuously feeds out a small amount of grain at a time, and FIG. 5 shows a manufacturing process thereof. First, one plate 24 made of metal or the like is used.
By bending (see (a)), a gutter 25 having a substantially U-shaped cross section having three surfaces is formed (see (b)). A large number of these gutters 25 are arranged concentrically, and their both side surfaces are welded and fixed (see (c) and (d)). Thus, an endless gutter frame 26 having a hollow portion at the center is formed ((e)).
reference). A member 27 having a cylindrical portion 27a fitted to the hollow portion of the gutter frame 26 and having a shaft 27b welded to one end is fitted to each end of the gutter frame 26, and fixed by welding ((f)). reference). Further, a cover 29 extending over substantially the entire outer periphery of the gutter frame 26 is attached by welding. FIG. 6 is an axial cross-sectional view in a state where the member 27 is attached to the gutter frame 26. The inner surface of the flange 27 c of the member 27 is welded to the end surface of the gutter frame 26. As shown in FIG. 7, a structure may be used in which a member 28 having a cylindrical portion 28a and a shaft 28b similar to the member 27 is used, and the member 28 and the inner peripheral surface of the end of the gutter frame 26 are welded together. . According to the above configuration, the rotary valve 8 forms a large number of rooms partitioned by the gutters 25, and can continuously feed out the grains little by little instead of discharging a large amount at a time. In the grain flowing down 5,
Radiant heat from the far-infrared radiator 15 disposed above the grain collection room 5 is uniformly radiated, and the far-infrared effect can be enhanced. Further, the rotary valve 8 can be continuously produced at a low cost as described above, and is structurally strong because both sides of each gutter 25 are welded to each other.

Next, the structure of the heat shield plate which also serves to regulate the flow of the rotary valve 8 will be described. FIG. 8 is an enlarged view showing the configuration in the vicinity of the rotary valve 8. Two right and left heat shield plates 3 are provided at positions near the outer peripheral surface of the rotary valve 8.
0a, 30b are provided, and the heat shield plates 30a, 30b are provided.
“b” also serves to regulate the flow of the grain discharged from the rotary valve 8. In the figure, the grain fed from the rotary valve 8 flows down from the upper right to the lower left along the inclined plate 19. That is, in the figure, the feed spiral 9 is disposed at the lower left, and the two heat shield plates 30a,
Of the heat shield 30b, the tip of the heat shield 30a on the feed spiral 9 side is configured to be located, for example, ΔL below the tip of the other heat shield 30b. As a result, the temporal timing of the kernel discharged from the left and right when the rotary valve 8 alternately repeats the left rotation and the right rotation is shifted. As a result, the feed spiral 9 of the kernel discharged from the left and right is shifted. The travel times up to approximately match. Therefore, the heat shield plates 30a and 30b regulate the amount of radiant heat to the kernels discharged from the left and right so that they substantially match.

Next, a feed-out regulating device provided between the rotary valve 8 and the feed spiral 9 will be described. FIG. 9 shows an embodiment of the feeding restricting device, in which a rotary valve 31 is disposed above a lower feed spiral 9. The rotary valve 31 is rotated by a motor 32 via a chain 33. By intermittently or delaying the rotation of the rotary valve 31 with respect to the drive of the rotary valve 8, the stagnation of the kernel at the stage before the kernel fed from the rotary valve 8 is transferred by the feed spiral 9. To force. This allows sufficient time for exposure to far-infrared rays to increase the amount of radiant heat of the grain, thereby enhancing the far-infrared effect. In addition, the far-infrared radiator 15 can be reduced in size, and the dryer can be reduced in size. Further, there is an effect of shielding the lower feed spiral 9 from heat.

FIG. 10 shows another embodiment of the feed-out restricting device, in which a plate 34 is provided above the feed spiral 9 so as to be rotatable downward around a fulcrum 35. The plate 34 can be opened and closed by the operation of a solenoid valve 36,
By adjusting the timing in terms of time, the grain can be stagnated. Further, the plate 34 is connected to a solenoid valve 36.
Instead, when a certain weight is applied to the plate 34 using the biasing force of the spring, the plate may fall down toward the feed spiral 9 and the stagnated grains may be sent to the feed spiral 9.

FIG. 11 shows another embodiment of the feed-out regulating device. The inclined plate has a double structure of an inner side surface 37a and an outer side surface 37b, and the inner side surface 37a is corrugated and swings. It is configured. That is, the rod 40 is brought into contact with the eccentric cam 39 attached to the output shaft of the motor 38 provided on the side wall of the dryer, and the inner surface 37a of the inclined plate attached to the rod 40 swings. The outer surface 37b of the inclined plate is fixed. Reference numeral 41 denotes a roller interposed between the inner side surface 37a and the outer side surface 37b. Thus, by making the inclined plate inner side surface 37a a swinging structure, it is possible to cause the grains to flow down more slowly than usual and to enhance the far-infrared irradiation effect. Further, since the grains are forced to flow down by swinging, the angle of the inclined plate can be reduced, and the height direction can be made compact.

[0014]

As described in detail above, the grain dryer of the present invention has a storage room, a drying room, a grain collection room, an air exhaust room, etc. inside the body, and the starting end is connected to the combustion device. A far-infrared radiator arranged so that the end side faces the rear wall surface of the dryer is provided in a grain collection room or a drying room, and the far-infrared radiation radiated from the far-infrared radiator and the hot air generated by the combustion device make the grain. In a grain dryer for drying grains, a plurality of air inlets communicating with the outside of the machine are provided on a lower wall surface of the machine frame, and the air inlets are provided with a side plate forming the grain collection chamber and a gap at a predetermined distance from the side plate. The space formed by the other side plate communicates with the space formed by the other side plate, and is separated from the lower part of the grain and sucked from the intake port into the hot air chamber through the opening provided in the side plate forming the grain collecting chamber. The structure that discharges the dried air prevents the side wall of the dryer from becoming hot and uses it for cooling. Can be used air as it is of grain drying, it can be effectively utilized heat.

[Brief description of the drawings]

FIG. 1 is a sectional view of a circulation type grain dryer according to the present invention as viewed from the front.

FIG. 2 is a side sectional view thereof.

FIG. 3 is a perspective view showing a structure near an inclined plate.

FIG. 4 is a side sectional view thereof.

FIG. 5 is a view showing a manufacturing process of the rotary valve.

FIG. 6 is an end sectional view of the rotary valve.

FIG. 7 is a cross-sectional view showing another embodiment.

FIG. 8 is a front view showing the configuration of a heat shield plate which also serves as flow control of a rotary valve.

FIG. 9 is a cross-sectional view showing one configuration of the feeding regulating device as viewed from the front.

FIG. 10 is a cross-sectional view showing another configuration of the feed-out regulating device as viewed from the front.

FIG. 11 is a front cross-sectional view showing another configuration of the feed-out regulating device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Grain dryer 3 Storage room 4 Drying room 5 Grain collection room 6 Hot air room 7 Exhaust room 8 Rotary valve 9 Feeding spiral 15 Far-infrared radiator 16 Combustion device 17 Intake port 18 Opening 19 Inclination plate 20 Inclination plate 20

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Takashi Uehara 1-Yachikura, Tobe-cho, Iyo-gun, Ehime Pref. BA03 CB03 CB06 CB24 CB33 CB34 DA02 DA20

Claims (2)

[Claims] 1. A storage room (3), a drying room (4), a grain collection room (5), a hot air room (6), an exhaust air room (7) and the like are provided inside a body, and a starting device is provided at a start end side. And a far-infrared radiator arranged such that the end side faces the rear wall surface of the dryer is provided in the grain collection room (5) or the hot air chamber (6), and the far-infrared radiator is heated by the combustion device. In a grain dryer for drying grains by far-infrared rays emitted from the far-infrared radiator and hot air from the combustion device, a plurality of intake ports (17) communicating with the outside of the machine are provided on a lower wall surface of the machine frame. , The intake port (17)
Is characterized by being communicated with a space formed by a side plate (19) forming the grain collecting chamber (5) and another side plate (20) provided with a gap of a predetermined distance from the side plate (19). And grain dryer. 2. A storage room (3), a drying room (4), a grain collection room (5), a hot air room (6), an exhaust air room (7) and the like are provided inside the fuselage. And a far-infrared radiator arranged such that the end side faces the rear wall surface of the dryer is provided in the grain collection room (5) or the hot air chamber (6), and the far-infrared radiator is heated by the combustion device. In a grain dryer for drying grains by far-infrared rays emitted from the far-infrared radiator and hot air from the combustion device, a plurality of intake ports (17) communicating with the outside of the machine are provided on a lower wall surface of the machine frame. , The intake port (17)
Communicates with a space formed by a side plate (19) forming the above-mentioned grain collecting chamber (5) and another side plate (20) provided with a gap of a predetermined distance from the side plate (19), so that the grain flows down. Side plate (1) that is located at a position away from the
The grain dryer according to claim 9, wherein the air sucked from the air inlet (17) is discharged into the hot air chamber (6) through the opening (18) provided in the hole (18).