JP4325091B2 - Far infrared grain dryer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for controlling the operation of a far-infrared grain dryer that supplies hot air generated from a burner to a far-infrared radiator cylinder and dries the grain using radiant heat generated from the surface of the far-infrared radiator.
[0002]
[Prior art]
In the far-infrared grain dryer, as disclosed in Japanese Patent Laid-Open No. 10-288462, the far-infrared radiator cylinder is arranged in the upper part of the grain collection room for supplying the grain that has flowed down from the drying room to the lower transport spiral. As described in Japanese Patent No. 3035473, there is one in which a far-infrared radiator cylinder is arranged so as to face the drying chamber.
[0003]
If a far-infrared radiator cylinder is placed in the upper part of the cereal collection room, whether the burner and other devices operate normally with no grain stuck, such as during test operation at the time of delivery or inspection operation before the season In the operation to check whether the burner combustion amount can be set arbitrarily (hereinafter referred to as the test operation mode), if the set value is the maximum burner combustion amount, etc., the radiant heat will radiate far infrared radiation. Because heat is transferred from the cylinder to the wall of the cereal chamber and the lower conveyor spiral, the wall of the cereal chamber and the lower conveyor spiral undergo thermal expansion, the falling plate that forms the wall of the cereal chamber is distorted, and the lower conveyor spiral is lateral When the operation is performed, problems such as the generation of vibration due to the deflection and the generation of a thrust load on the bearing supporting the lower conveyance spiral occur.
[0004]
In addition, when the far-infrared radiator cylinder is arranged so as to face the drying chamber, there arises a problem that the wall surface constituting the drying chamber is distorted.
[0005]
[Problems to be solved by the invention]
In order to solve such problems, for example, in Japanese Patent Laid-Open No. 9-89453, a reflector is provided on the inner surface of a grain take-out tank wall corresponding to a grain collection chamber in which grains flow down, and the reflector and the collector are further collected. An example is shown in which a heat insulating material is inserted between a cereal plate corresponding to the outer wall surface of the cereal chamber and a heat shield plate is provided on the upper part of the lower conveying spiral to block radiant heat. However, this method increases the cost, and when the grain begins to circulate and flow in the dryer, the lower conveying spiral temperature becomes almost equal to the grain temperature, and there is no problem due to thermal expansion. There was a disadvantage that it was not necessary. In addition, since the trial operation mode is an operation for confirming whether the burner and other devices operate normally, it is unnecessary to burn the burner and heat each part of the dryer with radiant heat. Damage the machine.
[ 0006 ]
[Means for Solving the Problems]
[0007]
The present invention supplies hot air from a burner to a far-infrared radiator cylinder, and in a far-infrared grain dryer provided with an operation control device for drying using radiant heat generated from the surface of the radiator cylinder, In operation where burner combustion is performed without sticking, hot air from the burner does not flow through the far infrared radiator cylinder, and in dry operation, hot air from the burner is switched through the far infrared radiator cylinder Means are provided.
[ 0008 ]
[Effects of the Invention]
[0009]
In the first aspect of the present invention , the hot air is not vented to the far-infrared radiator cylinder by the ventilation switching means and is discharged outside the apparatus, and when performing normal drying operation, the hot air is emitted from the far-infrared by the ventilation switching means. The radiator tube is ventilated and the far-infrared radiator tube is heated. Thereby, even in the trial operation mode, the lower transport spiral and the wall of the cereal collection chamber are not thermally expanded by radiant heat.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front full longitudinal sectional view showing a configuration of a far infrared grain dryer 1 of the present invention, and FIG. 2 is a side full vertical sectional view.
[0011]
A far-infrared grain dryer 1 according to the present invention is a drying device that dries a circulation type grain, and a storage chamber 3, drying chambers 4, 4, and exhaust air chambers 5, 5 are provided inside the machine frame 2. The hot air chamber 6 and the like are provided, and a hot hopper 7 for sticking grains is provided on the side wall of the hot air chamber 6.
[0012]
An upper transport device 9 having a discharge funnel 8 is provided in the ceiling portion of the storage chamber 3 above the machine frame 2, and the grains are transferred to a diffusion device 11 disposed in the center of the ceiling portion by an internal transport spiral 10. . The drying chambers 4 and 4 are provided on the lower side of the storage chamber 3 as a pair on the left and right sides, and are provided between the exhaust air chamber 5 and the hot air chamber 6 in order to ventilate the hot air while gradually flowing down the grains and dry it. Each of the left and right drying chambers 4, 4 further branches to the left and right so as to form both lower side surfaces of the exhaust chambers 5, 5, and the lower end is opened to the rotary valve 12. The rotary valves 12 and 12 provided below the drying chambers 4 and 4 rotate forward and backward alternately to feed out and flow down the grains by a fixed amount, and are rotatably supported along the longitudinal direction of the machine body. ing. Further, the rotary valves 12 and 12 are formed with groove-shaped receiving portions 13 in the axial direction so that the grains fall when the rotary valves 12 and 12 are rotated and the receiving portions 13 are positioned below. It is configured.
[0013]
The fallen grain slides in a thin layer on the falling plates 16, 16 that are provided between the tension hopper 7 and the lower conveying spiral 14 provided at the lower part of the machine frame 2 to form the collecting room 15, and are conveyed in the lower part. To spiral 14 Further, the grain supplied to the lower conveying spiral 14 is transferred toward the elevator 17 disposed on the front side of the machine frame 2 and is transferred to the elevator 17 via the return rod 18 on the terminal side, and again the upper conveying device. 9 is configured to be transported and circulated to the diffusion device 11 in the center of the ceiling by the transport spiral 10 inside. The elevator 17 is provided with a moisture meter 19 that samples the grains in the elevator and measures moisture, and a grain that detects the flow of the grains in the vicinity of the grain outlet on the start side of the upper conveying device 9. A hot air temperature sensor 21 is provided in the sensor 20 and the hot air chamber.
[0014]
The suction fan 22 for sucking hot air is driven by a suction fan motor 23, the lower transport spiral 14, the elevator 17 and the transport spiral 10 are driven by an elevator motor (not shown) mounted on the elevator 17, and the rotary valves 12, 12 are It is driven by a rotary valve motor 24.
[0015]
The far-infrared radiator cylinder 25 has a cylindrical shape formed of a thin steel plate coated with a paint that emits far-infrared rays when heated, and the hot air chamber 6 and the cereal collecting chamber 15 located in the center of the machine frame 2. It is arrange | positioned in the space comprised by these in the front-back direction, and is being fixed with the suspension mechanism 26 provided in the hot air chamber 6, and the machine frame 2 front wall surface.
[0016]
The suspension mechanism 26 has a structure in which a bracket 28 provided on the far-infrared radiator cylinder 25 is locked to a crosspiece 27 that extends across the front and rear wall surfaces of the machine frame 2. The diameter of the far-infrared radiator cylinder 25 is large enough to secure a distance h between the outer circumference of the cylinder and the lower conveying spiral 14 and to secure a distance m between the drying chambers 4 and 4 and one end of the cylinder. It opens to the front wall surface of the frame 2, and the other end extends substantially to the rear part of the machine frame 2.
[0017]
Further, the rear end portion of the far-infrared radiator cylinder 25 is branched to the left and right by a cylinder having a diameter smaller than that of the far-infrared radiator cylinder 25, and the tips of the branched cylinders 25a and 25a again extend forward in the machine frame 2. The opening 29 is opposed to the front wall surface of the machine frame 2 with a predetermined distance j from the front wall surface of the machine frame 2 to the inside of the machine.
[0018]
FIG. 2 shows a case where a burner 30 is disposed. The burner 30 is disposed so that its combustion part 31 is inserted into an opening 32 of the far-infrared radiator cylinder 25 provided on the front wall surface of the machine frame 2. The infrared radiator cylinder 25 and the combustor 31 have a gap of a predetermined distance d in the radial direction so that the combustion gas is mixed with the outside air, and are configured to move by a predetermined distance k in the front-rear direction.
[0019]
Further, as shown in FIG. 3, the burner 30 includes a combustion section 31, a combustion air supply fan 33, a combustion air supply fan motor 34, an ignition device 35, an electromagnetic pump 36, and an electromagnetic valve 37. The operation control device 38 provided above controls the test operation mode, the tension operation, the drying operation, and the discharge operation.
[0020]
The operation control device 38 sets and stores work-specific switches 39, 40, and 41 and a stop switch 42 that start work for each of the tension operation, the drying operation, and the discharge operation as shown in FIGS. Each means, and not only controls the burner 30 for each work, but also the suction fan motor 23, rotary valve motor 24, elevator, according to the input / output signals of the grain sensor 20 and moisture meter 19. The motor is controlled to operate, and the program is automatically executed based on the preset storage means by pressing any of the work-specific switches 39, 40, 41 provided in the operation control device 38. is doing.
[0021]
Further, in the operation in the trial operation mode, the grain sensor 20 is forcibly made insensitive by simultaneously pressing the two work-specific switches 41 and 42, and the control is switched to the burner combustion without inserting the grain. I am doing so. Next, the operation of the above embodiment will be described.
[0022]
In such a configuration, the far-infrared grain dryer 1 stops the grain sensor 20 input / output signal control and the sampling control of the moisture meter 19 when the work-specific switches 41 and 42 of the operation control device 38 are pressed simultaneously. Subsequently, when the work-specific switch 40 is pressed, the suction fan motor 23, the rotary valve motor 24, and the elevator motor are started. At the same time, the operation control device 38 can burn the burner combustion amount even if the burner combustion amount is stored in the storage means. The automatic setting is performed to the minimum, and the electromagnetic pump 36 and the electromagnetic valve 37 are controlled to minimize the fuel flow rate.
[0023]
After the burner 30 is ignited, the current values of the motors are detected to check whether or not they are normal, and the pulse signals of the hot air temperature sensor 21 and the combustion air supply fan motor 34 are detected to check whether there is any abnormality related to the burner. Find out. At this time, since the operation control device 38 controls the burner 30 to burn with the minimum fuel flow rate regardless of the setting conditions before operation, the surface temperature does not rise because the far-infrared radiator cylinder 25 is less heated, and therefore the grain Even if the particles are not circulating, since the radiant heat transfer to the lower conveying spiral 14 and the falling plate 16 is small, the lower conveying spiral 14 bends in the lateral direction due to thermal expansion, and when the operation is performed, vibration caused by the deflection or lower There is no possibility that a thrust load is generated in the bearing that supports the conveying spiral 14 or that the falling plate 16 that forms the wall surface of the grain collection chamber 15 is distorted.
[0024]
The hot air heated from the far-infrared radiator cylinder 25 is discharged from the front opening 29 of the cylinders 25a and 25a having a predetermined distance j from the front wall surface of the machine frame 2 to the inside of the machine frame 2, and from the hot air chamber 6 to the drying chamber 4. , 4 are sucked into the exhaust chambers 5 and 5 and discharged outside the machine. 6 and 7 show an embodiment as claimed in claim 2. That is, FIG. 6 shows that when the far-infrared radiator cylinder 25 is divided into 25c and 25d at approximately the center in the front-rear direction, and the front-side far-infrared radiator cylinder 25c is automatically operated in the trial operation mode. In other words, it is moved rearward of the machine casing 2 by a moving motor (not shown) (FIG. 6 (2)).
[0025]
A shaft 43 having one end connected to the moving motor and the other end rotatably supported on the rear side of the machine frame 2 is stretched in the front-rear direction of the machine frame 2, and a part of the shaft 43 has an external screw with a large lead. A sleeve 44 provided with an inner screw that engages with the outer screw is fixed to the far-infrared radiator cylinder 25c. When the moving motor is rotated, the shaft 43 rotates. It is configured to slide along the outer screw.
[0026]
As a result, when the test operation mode is selected and activated by the operation control device 38, the moving motor operates to move the far-infrared radiator cylinder 25c to the rear of the machine body, and the hot air generated by the burner 30 is the far-infrared radiator cylinder 25c. , 25d are sucked from the hot air chamber 6 through the drying chambers 4 and 4 to the exhaust air chambers 4 and 4 without being ventilated and heated, and discharged outside the apparatus. For this reason, the lower conveyance spiral 14 bends in the lateral direction due to thermal expansion, and when the operation is performed, vibration is generated by the deflection, a thrust load is generated on the bearing supporting the lower conveyance spiral 14, and a wall surface of the grain collection chamber 15 is formed. Problems such as distortion of the flow-down plate 16 do not occur, and it is possible to check whether there is any abnormality in the burner 30 and other devices.
[0027]
In FIG. 7, an opening 45 is provided on the upper surface of the far-infrared radiator cylinder 27 on the burner 30 side, a lid 46 covering the opening 45 is fixed in the far-infrared radiator cylinder 25 with a hinge 47, and the lid 46 When the trial operation mode is selected and activated, the lid 46 is moved by the motor 49 via the rod 50 and the arm 48 and the far-infrared radiator is configured. The inside of the cylinder 25 is closed, and the hot air of the burner 30 is discharged upward from the opening 45 of the far-infrared radiator cylinder 25 by the lid 46, and the hot air generated by the burner 30 vents the far-infrared radiator cylinder 25, Do not heat.
[0028]
FIG. 8 relates to the improvement of the rotary valve 12 used in the grain dryer using far-infrared rays, and the rotary valve 12 is alternately rotated forward and backward to form a groove shape in its axial direction. The receiving part 13 feeds and flows down the grain by a fixed amount and is rotatably supported along the longitudinal direction of the machine body so that the grain falls when the receiving part 13 is positioned below. Has been.
[0029]
By the way, if it is the structure as it is, since the grain will fall gradually according to the angle of repose ((theta)) as the said receiving part 13 rotates below, a grain shows the wide fall distribution w on the falling plate 16 ( FIG. 8 (2), (3)). Since the grains are dried by receiving the radiation heat from the far-infrared radiator cylinder 25 while sliding down on the falling plate 16 in a thin layer, the amount of heat transfer varies depending on the location of the fall in the wide fall distribution as described above. This means that drying cannot be made uniform. Therefore, the present invention is intended to make the grains falling from the rotary valve 12 have a narrow distribution on the flow-down plate 16, thereby achieving uniform drying. Therefore, a grain drop receiving portion 51 is provided below the rotary valve 12, the lower portion being formed with holes of a predetermined interval u and the upper portion being provided so as to cover the substantially lower half of the rotary valve 12. It is said.
[0030]
As a result, the grains gradually falling from the rotary valve 12 gather once in the grain drop receiving portion 51 and fall to the falling plate 16 from the lower hole u, and the amount of radiant heat transferred by the far-infrared radiator cylinder 25. However, it is almost the same in any grain, and drying can be made uniform.
[0031]
【The invention's effect】
According to the present invention, far-infrared radiation is provided with an operation control device 38 for supplying hot air from the burner 30 to the far-infrared radiator cylinder 25 and drying using radiant heat generated from the surface of the far-infrared radiator cylinder 25. In the grain dryer 1, there is an operation for checking whether the burner 30 and other devices normally operate in a state in which the grain is not stuck, such as a test operation at the time of delivery or a check operation before the season. Thus, since the burner 30 does not heat the far-infrared radiator cylinder 25 to a high temperature, the amount of radiant heat transferred to the lower transport spiral 14, the cereal collection room 15 wall surface, or the drying room 4, 4 wall surface is reduced. Therefore, it is possible to prevent the occurrence of problems such as thermal expansion and distortion of each wall surface, deflection in the lateral direction in the lower conveyance spiral 25, generation of vibration due to this deflection, and generation of thrust load on the bearing supporting the lower conveyance spiral. . In addition, it can be manufactured at low cost and has the effect of saving energy by not using fuel.
[Brief description of the drawings]
FIG. 1 is a front full longitudinal sectional view showing a configuration of a far-infrared grain dryer.
FIG. 2 is a full side sectional view showing the configuration of a far-infrared grain dryer.
FIG. 3 is a cross-sectional view of a burner.
FIG. 4 is an operation control device.
FIG. 5 is a configuration diagram of an operation control device.
FIG. 6 shows another embodiment according to the present invention.
FIG. 7 shows another embodiment according to the present invention.
FIG. 8 is a grain dropping receptacle according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Far-infrared grain dryer 2 ... Machine frame 3 ... Storage chamber 4 ... Drying chamber 5 ... Exhaust chamber 6 ... Hot air chamber 7 ... Stretch hopper 8 ... Discharge funnel 9 ... Upper conveyance apparatus 10 ... Conveyance spiral 11 ... Diffusion Device 12 ... Rotary valve 13 ... Receiving part 14 ... Lower conveying spiral 15 ... Grain collection room 16 ... Flowing plate 17 ... Elevator 18 ... Return rod 19 ... Moisture meter 20 ... Grain flow sensor 21 ... Hot air temperature sensor 22 ... Suction fan 23 ... Suction fan motor 24 ... rotary valve motors 25, 25a, 25b, 25c, 25d ... far-infrared radiator cylinder 26 ... suspension mechanism 27 ... bar 28 ... bracket 29 ... opening 30 ... burner 31 ... combustion part 32 ... opening 33 ... Combustion air supply fan 34 ... Combustion air supply fan motor 35 ... Ignition device 36 ... Electromagnetic pump 37 ... Electromagnetic valve 38 ... Operation control devices 39, 40, 41, 42 ... Switch by operation 43 ... Shaft 4 ... sleeve 45 ... opening 46 ... lid 47 ... hinge 48 ... arm 49 ... motor 50 ... rod 51 ... Kokuryu falling receiving

Claims (1)

  In the far-infrared grain dryer provided with an operation control device that supplies hot air from the burner to the far-infrared radiator cylinder and uses the radiant heat generated from the surface of this radiator cylinder to dry the grain In the operation in which the burner combustion is performed, there is provided switching means for preventing the hot air from the burner from passing through the far-infrared radiator cylinder, and in the drying operation, allowing hot air from the burner to pass through the far-infrared radiator cylinder. A far-infrared grain dryer characterized by that.

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