JPH1019467A - Grain dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To contrive the structure of a grain collection compartment so as to lengthen an irradiation time of far infrared rays and equalize the amount of irradiation and enhance the drying effect of the far infrared rays in the case when a heat dissipating pipe is set up in a grain collection compartment of a dryer. SOLUTION: A grain flow-down plate 21, which covers the upper part of a heat emission pipe like the eaves, is provided under a delivery valve 7 of a grain flow-down passage 4. The space between the upper part and the lower part of a gutter-like grain collection plate 23 of a grain collection compartment 6 is bent, thereby forming the slope of the lower part of the grain collection plate more gradually than that of the upper part of the grain collection plate. The tip of the grain flow-down plate is placed close to the upper part of the grain collection plate, thereby dropping the grains which drop from the delivery valve 7 along the grain flow-down plate 21. Then, the grains drop slowly on the grain collection plate 23 over a wide area, which makes it possible to radiate the far infrared rays of the heat emission pipe 18 to a satisfactory extent and dry up swiftly the grains uniformly.

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 drying grains while circulating in the machine, and more particularly to an improvement in a heating device for the grain dryer.

[0002]

2. Description of the Related Art In a circulation type grain dryer, a grain flow passage formed in an aerated structure is connected to the bottom of a tempering chamber at the top of the machine body.
The hot air from the burner is traversed by the hot air to the grains flowing down. The grains that have flowed out of the downflow passage are collected in a grain collection room at the bottom of the machine body, returned to the conditioning room, and again flow down the downflow passage to be exposed to hot air. In this way, drying is performed by repeatedly circulating the inside of the machine. During the circulation, the kernels are heated only when flowing down the grain downflow passage, and are not heated in other portions. Hot air also crosses the grain downflow path directly from the burner, and is then discharged outside the machine. For this reason, there was a problem that the efficiency was poor and the drying time was long. Therefore, the present inventors installed a radiator tube having a far-infrared radiator formed on the outer periphery in a grain collecting room, and supplied hot air from a burner through the radiator tube. A device that emits infrared light was proposed (Japanese Patent Application No. 7-29).
No. 7831). According to this, the grains are heated not only when flowing down the downflow passage, but also in the grain collecting room, and since the heat of the burner can be effectively used, there is an advantage that the quality and efficiency of drying can be improved compared to the conventional method. .

[0003]

However, in this case, the grains that have fallen from the downflow passage into the grain collecting chamber are immediately sent out to the tempering chamber and stay in the grain collecting chamber for a short time. There was a problem that the infrared irradiation could not be sufficiently enjoyed and the effect of drying the far infrared rays had not yet been utilized. Accordingly, the present invention has been made to improve the efficiency and quality of drying by making full use of far infrared rays from a heat radiation tube.

[0004]

In order to achieve the above object, according to the present invention, a radiating tube having a far-infrared radiator formed on the outer periphery thereof is provided at the center of a grain collecting chamber. In addition, an eaves-shaped flocking plate that covers the upper part of the radiator pipe is provided, and a low and inclined tip of the flocking plate is installed close to an upper part of a gutter-shaped collecting plate constituting a collecting chamber.

[0005]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front sectional view of a grain dryer embodying the present invention, and FIG. 2 is a side view showing a part of the grain dryer in section. A heat treatment room 2 is provided above the fuselage 1. A pair of left and right inclined plates 3 and three flow regulating chevrons 14 are provided at the bottom of the tempering chamber 2,
Four inverted C-shaped flow-grain portions 5 are formed, and the grain flow passages 4 are connected to the respective lower end openings. The grain flow passage 4 is
The parallel left and right side walls are formed by a perforated plate 17, and the falling port at the lower end thereof is connected to the grain collecting chamber 6 provided at the lower part of the machine body 1. A delivery valve 7 is installed at each drop opening. Perforated plate 17
Are provided with a number of small holes to give the grain flow passage 4 air permeability. In the space partitioned by the four grain downflow passages 4, the center is defined as a first exhaust chamber 9a, and the outside is defined as a second exhaust chamber 9b and a third exhaust chamber 9c. Then, the grain flow passage 4 is sandwiched between the first hot air chamber 8a and the second hot air chamber 8b in the remaining space and the exhaust air chambers 9a, 9b and 9c. Thereby, the hot air is generated in the first hot air chamber 8a.
From the second hot air chamber 8b to the first and second exhaust air chambers 9a and 9b. It is formed so as to be able to ventilate to the first exhaust chamber 9a and the third exhaust chamber 9c across the passage 4. These exhaust chambers 9a, 9b, and 9c
Is connected to a suction fan 11 (see FIG. 2) on the back of the machine.

Reference numeral 18 denotes a heat radiating pipe which is horizontally installed at the center of the grain collecting chamber 6, and to which a burner 10 on the front of the machine body is connected at its starting end.
The heat radiating pipe 18 is folded back in a U-shape in the grain collecting chamber 6, and its end penetrates the front of the grain collecting chamber and rises upward to be connected to the hot air chambers 8a and 8b, respectively. As shown in FIG. 3, the heat radiating tube 18 has a double tube structure in which a predetermined range from a connection portion with the burner 10 is covered with an outer tube, and a far-infrared paint (for example, Company B-600)
To form a far-infrared radiator. At the bottom of the trough-shaped grain collecting plate 23 constituting the grain collecting chamber 6, a grain collecting spiral 15 extending in the front-rear direction is provided, and its sending end is lifted by the elevator 1.
6 and the upper outlet of the lift elevator 16 is connected to the beginning of the grain feed spiral 12 of the conditioning room 2. A diffusion plate 13 is attached to the grain feed port at the end of the grain feed spiral 12. Accordingly, the circulation path of the grains returning from the refining chamber 2 to the refining chamber 2 via the grain collecting passage 6, the grain collecting spiral 15, the ascending elevator 16, and the grain feeding spiral 12 from the grain refining chamber 2 through the grain flow passage 4. Form.

FIG. 4 is an enlarged sectional view of the inside of the grain collecting chamber 6. A cover plate 22 and an eaves-like slanting plate 21 provided on both sides of the cover plate 22 are provided below the feed valve 7.
, And the lower, inclined lower end of the flocking board 21 is brought close to the upper part of the grain collecting board 23. Reference numeral 25 denotes a blower of the burner 10, and reference numeral 26 denotes a protective cover frame of the heat radiating pipe 18.

[0008] The operation of the grain dryer configured as described above will be described. Grains are supplied to the refining room 2 by the ascending elevator 16 and the grain feeding spiral 12, and the refining room 2 is supplied by the diffusion plate 13.
Spread widely inside. The grains fill the grain flow passage 4 and reach the delivery valve 7. In this state, the burner 10 is burned, hot air is sent out to the heat radiating pipe 18 by the blower 25, and the double pipe portion 19 of the heat radiating pipe 18 is heated by the hot air of the burner 10, and the far-infrared paint coated on the outer periphery is used to collect the granulation room. 6 emits far infrared rays. Further, the burner 1 is formed by the double pipe section 19.
Prevent overheating of the part close to zero. The hot air that has heated the double-pipe portion 19 continues to heat the heat-dissipating pipe 18 that is folded back into a U-shape, and is supplied from its tip to the first hot-air chamber 8a and the second hot-air chamber 8b. Then, the first hot air chamber 8a traverses the grain downflow passage 4 to the first exhaust air chamber 9a and the second exhaust air chamber 9b, and from the second hot air chamber 8b to the grain downflow path 4
Are traversed to the first exhaust chamber 9a and the third exhaust chamber 9c, from which the air is discharged out of the machine by the suction fan 11. When crossing the grain flow-down passage 4, it passes between the grains descending through the grain flow-down passage 4, and the surface layer is dried.

Although the surface temperature of the radiator tube 18 decreases as the distance from the burner 10 increases, the entire shape is folded in a U-shape and the tip 18a returns to the connection portion with the burner 10. The surface temperature in the longitudinal direction of the entire radiator tube 18 is averaged, and the radiation amount of far-infrared rays is also substantially uniform. The grains descending through the grain downflow passage 4 are discharged onto the flocking board 21 by the feed valve 7 and fall along the slope of the flocking board 21 to the upper part of the grain collecting board 23, and the grain and the grain collecting It passes down the gap between the boards 23 and descends along the gradient of the grain collection board 23. At this time, the falling grains are uniformly exposed to the far infrared rays of the radiator tube 18. The grains are uniformly heated by the penetration of far infrared rays, and the water content in the grains moves to the surface, speeding up the drying of the grains, and suppressing the occurrence of defects such as shrinkage and body cracks.

The grains that have fallen into the grain collecting chamber 6 gather at the bottom of the valley of the grain collecting plate 23, are sent forward by the grain collecting spiral 15, are transferred to the ascending elevator 16, ascend, and ascend the ascending elevator 1
At the upper end of 6, it moves to the grain feeding spiral 12 and is returned to the upper part of the conditioning room 2. Thereafter, the moisture content of the grain is suitable for storage (for example, 12 ~
(14%) repeatedly. As described above, the grains flowing into the grain collection chamber 6 from the grain downflow passage 4 are:
Elevator 1 which slides down on the husk 23 to the bottom of the valley
In the present embodiment, the grains are guided by the flowing grain plate 21 and fall to the upper part of the grain collecting plate 23 until the radiating tube 18 is moved to the position 6. The distance to slide down the collecting board 23 is long. Therefore, the drifting board 21
The irradiation time of far-infrared rays is longer than that of the ones that fall directly from the grain downflow passage without any waste, so that the drying effect of far-infrared rays can be used effectively. Moreover, since the grains are widely spread on the plate surface of the grain collecting plate 23 by the drifting grain plate 21, far infrared rays are irradiated on average, and drying is not uneven.

FIG. 5 shows another example of the present invention. Collection board 23
The upper part and the lower part are bent so that the slope of the grain collecting plate lower part 23b is formed more gently than the grain collecting plate upper part 23a, and the lower end of the flowing grain plate 21 is viewed from the grain collecting plate upper part 23a. Reference numeral 24 denotes the bent portion. In this manner, if the slope of the lower portion 23b of the grain collecting plate is formed to be gentle, the falling speed of the grain can be reduced and the irradiation time of far infrared rays can be further lengthened.

[0012]

According to the present invention, a radiating pipe for a far-infrared radiator is provided at the center of the grain collecting chamber, and a fluff plate for covering the upper part of the radiating pipe like an eave is provided immediately below the feed valve of the grain downflow passage. By moving the tip of the plate to the upper part of the gutter-shaped plate, the grains flowing down from the feed valve are dropped along the plate to the upper part of the plate, and a wide area is covered on the plate. , It is possible to sufficiently irradiate the far infrared rays of the radiator tube, and therefore, it is possible to dry the grains uniformly and quickly, and to efficiently perform high-quality drying without shrinkage of the grains and cracking of the body. I can do it.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a grain dryer of the present invention.

FIG. 2 is a side view showing a part of the above in section.

FIG. 3 is a plan view of a radiator tube of the present invention.

FIG. 4 is an enlarged sectional view of an example of a grain collecting room of the present invention.

FIG. 5 is an enlarged sectional view of a grain collecting room of another example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Airframe 2 Conditioning room 3 Inclined plate 4 Grain falling passage 5 Flowing part 6 Grain collection room 7 Feeding valve 8 Hot air room 9 Exhaust room 10 Burner 11 Suction fan 12 Feeding spiral 13 Diffusion plate 14 Flow control angle 15 Grain spiral 16 Ascending elevator 17 Perforated plate 18 Heat radiating pipe 19 Double pipe part 20 Heat radiating part 21 Flowing grain plate 22 Covering plate 23 Grain collecting plate 24 Bending part 25 Blower 26 Protective cover frame

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tomohiko Ichikawa 1-40-2 Nisshin-cho, Omiya-shi, Saitama Prefecture Within the Biotechnology-Specific Industrial Technology Research Promotion Organization (72) Inventor Kojo ▲ Rei ▼ 2 Iyo, Ehime 1 Togachi-cho, Guntobe-cho, Iseki Agricultural Machinery Co., Ltd. (72) Inventor Masafumi Yumetate 1 Toya-cho, Tobe-cho, Iyo-gun, Ehime Prefecture 1st place of Iseki Agricultural Machinery Co., Ltd. Iseki Agricultural Machinery Co., Ltd. (72) Inventor Keiichi Miyazaki 1 Ehime Prefecture, Toyo-cho, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd. (72) Inventor Eiji Nishino 1-Tochibe, Hachikura, Iyo-gun, Ehime Prefecture Department (72) Inventor Takashi Uehara 1 Toya-cho, Tobe-cho, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd.

Claims (1)

[Claims] 1. A grain downflow passage having a ventilation structure is connected to a conditioning room, a hot air chamber and an exhaust air chamber are adjacent to each other with the grain downflow passage interposed therebetween, and a lower end of the grain downflow passage is connected to a grain collection chamber. A feed valve is provided at the lower end of the grain downflow passage, a radiator tube having a far-infrared radiator formed on the outer periphery is installed in the center of the grain collection chamber, and a burner is connected to one end of the radiator tube. The other end is connected to the hot air chamber, and an eaves-shaped flocking plate that covers the upper part of the radiator pipe is provided below the delivery valve. A grain dryer close to the top of a gutter-shaped grain collecting plate.