JP4055576B2 - Grain dryer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a grain dryer that dries and sprays hot air while circulating a storage room, a drying room, and a grain collection room, and relates to silent operation at night.
[0002]
[Prior art]
Conventionally, in order to perform a silent operation at night, the number of rotations of the suction fan is reduced (for example, Patent Document 1), or the rotation of a rotary diffusion plate provided on the ceiling of the storage chamber is stopped (for example, Patent Document 2), It is configured to migrate to. It should be noted that the transition to the silent mode can be performed according to the operator's intention, or can be automatically performed by timer setting.
[0003]
[Patent Document 1]
JP 2002-310558 A [Patent Document 2]
JP-A-7-234071 [0004]
[Problems to be solved by the invention]
However, in the above embodiment, since it is a configuration that uniformly shifts to the silent mode regardless of the grain condition, if the mode is silently shifted to the silent mode, the progress of drying may be impaired.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the present invention has taken the following technical means.
That is, the invention according to claim 1 is configured to stack the storage chamber 2, the drying chamber 3, and the grain collection chamber 4 in this order, and is configured to circulate the grains by driving the elevator 5, and passes through the drying chamber 3 part. In the grain dryer which dries the grains with hot air, the hot air is configured to change the number of rotations of the diffusion plate disposed on the ceiling of the storage chamber and sandwich the grain flow passage in the drying chamber 3 parts The rotation speed of the suction fan that communicates with the exhaust air chamber can be changed, and the rotation of the rotating diffuser is stopped during the preset time period, and the suction fan rotation is changed to the predetermined speed or less. The transition to the silent mode is configured to switch from the normal drying mode to the silent mode on condition that the grain moisture is equal to or lower than a predetermined moisture value or a predetermined time or more has elapsed after the start of drying. Of the dried grain dryer
[0006]
This reduces the rotation of the suction fan and stops the rotation of the diffuser at night, so that a quiet environment is obtained and the vicinity of the grain dryer is freed from noise. In addition, since the transition to the silent mode is based on the condition that the grain is below the predetermined moisture value or the passage of the predetermined time or more after the start of the grain drying, the situation where the predetermined moisture value is high or the situation where the high situation can be predicted By lowering the suction fan, the drying delay is caused and the grain quality is not deteriorated. By stopping the spreader, the deterioration of the grain quality caused by the uneven tension is prevented .
[0007]
The invention according to claim 2 is configured such that the storage chamber 2, the drying chamber 3, and the grain collection chamber 4 are stacked in this order, and are configured to circulate the grains by driving the elevator 5, and pass through 3 parts of the drying chamber. In a grain dryer for drying grains with hot air, a hot air chamber configured to change the number of rotations of a diffusion plate disposed on the ceiling of the storage chamber and sandwiching a grain flow passage in the drying chamber 3 parts In addition, the rotation speed of the suction fan communicating with the exhaust air chamber can be changed, and the rotation of the rotating diffuser is stopped during a preset time period, and the suction fan rotation is set to a predetermined rotation speed or less. The silent dryer is provided with a silent mode, and the transition to the silent mode is a grain dryer configured to switch from the normal drying mode to the silent mode on condition that the grain tension amount is equal to or less than the predetermined tension amount.
[0008]
As a result, in a situation where the amount of tension is very large, a drying delay is caused by lowering the suction fan, or grain clogging is caused by stopping the spreader. Since the condition is that the amount is equal to or less than the predetermined amount, such an unexpected state is not caused.
[ 0009 ]
[0010]
【The invention's effect】
According to the first aspect of the invention, since the rotation of the suction fan is reduced and the rotation of the diffusion plate is stopped at night, a quiet environment can be obtained, and noise can be reduced near the grain dryer. Also, at night, it does not shift to silent mode without darkness, and it is determined whether or not to enter silent mode by looking at the grain moisture status, so it is possible to prevent the grain quality from being deteriorated particularly under high moisture conditions .
[0011]
The invention according to claim 2 is accompanied by the effect of noise reduction as described above, and the transition to the silent mode is based on the condition that the amount of the grain is not more than the predetermined amount. Does not cause such a state .
[0012]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to the drawings. 1 is a machine frame of a grain drying device, which is stacked in the order of a storage chamber 2, a drying chamber 3, and a grain collection chamber 4, and burners in the drying chamber 3 while circulating grains by driving an elevator 5 provided outside. 6 is a form in which hot air generated by the combustion and the suction fan 7 is bathed and dried.
[0013]
In the drying chamber 3, the central and left and right hot air chambers 8, 9, 9 can be supplied with hot air from the burner 6, while a cross section surrounded by V-shaped grain flow passages 10, 10 formed of a breathable material. The rhombus-shaped air discharge chambers 11, 11 are connected to the suction fan 7 so that hot air is applied to the grains flowing through the grain flow passages 10, 10.
[0014]
12 is a feed valve that allows a predetermined amount of grain to flow down while rotating forward and backward. Reference numeral 13 denotes a lower transfer device that communicates with the elevator 5, and reference numeral 14 denotes an upper transfer device connected to the upper side of the elevator 5, which can supply grains to the diffusion plate 15 at the upper part of the storage chamber 2. The burner 6 and the grain circulation mechanism are performed by a computer having a memory for storing a control program necessary for drying control, various data, and the like. That is, the operation panel 16 is provided with a liquid crystal display unit 17, and four push button switches 18 to 21 and an emergency stop switch 22 are arranged slightly apart along the lower edge of the display unit 17. ing. The functions of the switches 18 to 21 are displayed on the display unit 17, and in the example shown in the figure, the switches 18 to 21 are sequentially configured as operation switches for stretching, drying, discharging, and stopping. This is a configuration that can have different functions.
[0015]
The built-in control unit receives the switch information on the operation panel 16 and the detection information from the sensors installed in each part of the dryer machine frame 1 and controls the burner combustion amount, grain circulation system based on the necessary comparison calculations. Start / stop control, display content control of the display unit 17 and the like. The switches on the operation panel 16 can set grain type, moisture setting (finishing moisture), amount of filling, timer increase / decrease, etc., in addition to each setting of tension / dry / discharge / ventilation.
[0016]
FIG. 4 is a control block diagram. In addition to the setting information from the switches, the calculation control unit 23 of the computer built in the control box having the operation panel 16 includes the moisture meter 24 detection information and the throwing unit of the elevator 5. Grain detection information of the provided grain flow detector, hot air temperature detection information, and the like are input. On the other hand, the output information includes a combustion system signal of the burner 6, for example, a fuel supply signal, a flow rate control signal thereof, a vertical transfer spiral, a grain circulation motor 27 control signal for driving the elevator 5, a suction fan 7 motor 29 control signal, and the display. There is a display output to the unit 17.
[0017]
Further, the arithmetic control unit 19 reduces the rotational speed of the suction fan 7 to a predetermined rotational speed and stops the rotation of the rotary diffusion platen 11 from the evening time to the morning time preset by the built-in timer means. It is configured to shift to the silent mode. That is, the fan motor 29 that rotates the suction fan 7 is provided in advance so as to be capable of shifting in two steps of high and low, rotate in the high speed side in the normal drying state (normal mode), and the control unit 19 when determining the silent mode transition condition. Is a low-speed side switching signal. The diffusion plate 15 also includes an independent diffusion motor 30, and a stop signal is output to the diffusion motor 30 when the silent mode transition condition is determined.
[0018]
Accordingly, at the predetermined time in the evening, the suction fan 7 becomes low speed from the normally dry state, and the diffusion plate 15 stops, and at the set time of dawn, the suction fan 7 rotates again at high speed and the diffusion plate 15 also rotates. It is configured to return (FIG. 5).
Furthermore, as shown in FIG. 5, the arithmetic control unit 19 is configured to prevent the transition to the silent mode as follows. That is, when the predetermined condition is not satisfied, the normal mode is continued without shifting to the silent mode. The predetermined condition is that (1) the detected moisture value Mn is less than or equal to the predetermined value Mα, and (2) the amount V is less than a predetermined value (Vs−ΔV) less than the expiration Vs by a certain amount ΔV. . When any one of the conditions (1) and (2) is not satisfied, the transition to the silent mode is not performed (steps 06 and 07).
[0019]
The operation panel 16 is provided with a forced switch 31. The forcible switch 31 is configured to forcibly shift to the silent mode when it is turned on when the condition (1) or (2) is not satisfied (step 13). Therefore, the operator can select the transition to the silent mode by operating the forced switch 31.
[0020]
The operation of the above example will be described. The dried grain is put into the storage chamber 1, the display screen of the operation panel 16 is switched to the setting input screen, and setting operation is performed for the amount of filling, finishing moisture, and drying type of constant temperature control or drying speed control drying (step 01). . Next, the display screen is switched to the work mode designation screen, and the switch 19 corresponding to “drying” is turned on. As a result, the rotating parts start operation, and the fuel is supplied to the burner 6 and ignited to enter a dry operation state. At this time, the operation is in the normal mode. At a predetermined time in the evening due to the passage of time, for example, 7:00 pm, it is determined whether or not the detected moisture value Mn at that time is less than or equal to the predetermined moisture value Mα (step 06), and the amount of tension V is the predetermined tension. It is determined whether or not it is equal to or less than the insertion amount (Vs−ΔV) (step 07). If both conditions are satisfied, the rotation of the suction fan 7 is switched to low speed (step 08), and the diffusion plate 15 is stopped. (Step 09), the silent mode is entered. In this state, when the time elapses and a predetermined time at dawn, for example, 6:00 am, normal mode return processing is performed. That is, the suction fan 7 returns to high speed rotation (step 11), and the diffusion plate 15 returns to the rotational drive state (step 12). When the above state is continued and the detected moisture Mn becomes equal to or lower than the finished moisture value, the drying is finished.
[0021]
As described above, during the preset evening time to dawn time, the noise is reduced by shifting to the silent mode and lowering the rotation of the suction fan 7, and the spread of the diffusion plate 15 is stopped to stop the scattering of the grains. Noise can be prevented and noise reduction at night can be achieved throughout.
[0022]
In step 06, it is determined whether or not the mode is switched to the silent mode by comparing the moisture value. Instead, the normal mode is switched to the silent mode on condition that a predetermined time or more elapses after the start of drying. You may comprise as much as possible. Even in the case of watering, the transition to the silent mode under the high moisture state at the initial stage of drying cannot be performed, so that the deterioration of grain quality can be prevented.
[0023]
In step 06 and step 07, when the water content is equal to or greater than the predetermined moisture value Mα or equal to or greater than the predetermined amount of insertion (Vs−ΔV), the forced switch 31 is forcibly shifted to the silent mode, or This is a configuration for maintaining the normal mode. Therefore, transition to the silent mode can be performed according to the operator's intention. At this time, as shown in FIG. 6, when the forced switch 31 is operated to shift to the silent mode, the overheat phenomenon can be prevented by stopping the burner 6 and shifting to the so-called ventilation mode. This is advantageous in situations where the amount V is near expiration. The forcible switch 31 may be configured to forcibly shift to the silent mode even if it is not in a predetermined time range.
[0024]
FIG. 7 shows a specific configuration of the feeding valve 12. A plurality of valve units 34, 34... Which are U-shaped in cross section and which are long in the front-rear direction are appropriately fixed along the plurality of polygonal rings 35, 35. The valve body is constituted by fixing by means such as riveting. A seal rubber 37 is disposed on each of the valve partition portions 36, 36,... That is, it is a configuration in which a sealing rubber 37 that is higher than the height of the valve partition part 36 in the radial direction is sandwiched between the valve partition part 36 and the holding plate 38 that is long in the front-rear direction, and is fixed with a fastening tool such as a bolt or a nut. Although the seal rubber 37 is formed by vulcanization molding, an engagement base portion 37a having a J-shaped cross section is formed so as to hold the base portion of the holding plate 38.
[0025]
As described above, the feeding valve 12 forms a valve main body by joining a plurality of valve single bodies 34 in the circumferential direction, and when the seal rubber 37 is attached to the valve partition portion 36 protruding in the radial direction, the seal rubber 37 By forming the engagement base portion 37a having a J-shaped cross section so as to hold the base portion of the holding plate 38 at the base portion of the base plate, the conventional configuration having a mere flat seal rubber has a structure that is long in the direction of the rotation axis, and Due to repetitive forward and reverse rotations, they are displaced in the radial direction and eventually gradually protrude to form irregular edges on the seal rubber 37, so that proper sealing performance cannot be ensured. In order to hold the engagement base portion 37a of 37, when the holding plate 38 is fixed, it is not easily pulled out in the radial direction, thus eliminating the conventional drawbacks. It becomes possible.
[0026]
8 and 9 disclose an assembly configuration of a panel that mainly constitutes the outer wall of the storage chamber 2 of the dryer frame 1. A wall portion is formed by adding panels 39 and 40 having the same shape in the vertical direction, and a reinforcing frame 41 having an L-shaped cross section is provided on the upper surface of the panel 39 for the base of the reinforcing and upper panel 40. A hole 41a is formed in the reinforcing frame 41, and an engaging projection 42 is provided in a protruding shape. Note that the base of the engaging protrusion 42 is fixed to the back surface of the reinforcing frame 41 by welding or the like. Reference numeral 41b denotes a bent portion that is bent downward toward the front side. On the other hand, a reinforcing frame 43 is formed at the lower end of the upper panel 40 so as to be joined to the upper surface of the reinforcing frame 41. The reinforcing frame 43 is formed with a hole 43a and a bent portion 43b that are slightly opened to fit the engaging protrusions 46 therein. The bent portion 43b is longer than the suspended length of the bent portion 41b of the lower panel 39 side reinforcing frame 41, and the upper panel 40 is rotated around the contact position of the bent portion with respect to the lower panel 39 as shown in the figure. The engaging protrusion 42 is engaged from the front side while being moved.
[0027]
On the other hand, when the upper panel 40 is a front panel, a side panel 44 having the same configuration is provided. In this configuration, a reinforcing frame 45 is provided on a side end face, and engaging projections 46, 46 having the same form as the above engaging projection are provided in the vertical direction. On the other hand, engaging holes 40a, 40a are arranged on the side of the front upper panel 40 so as to be engageable.
[0028]
With the above-described configuration, when the front upper panel 40 is finally mounted after the lower panel 39 and the side panel 44 are assembled, the upper panel 40 is first bent near the contact position of the bent portion with respect to the lower panel 39. The engagement protrusion 42 is engaged from the front side while being rotated around the center. At this time, the engagement holes 40a and 40a are engaged with the engagement protrusions 46 and 46, and are slightly slid to be set at the normal positions. By the way, since the upper panel can be engaged with the engaging protrusion 42 with respect to the lower panel and can be independently held in a slightly inclined state, it is possible to perform an assembling work by one person or a small number such as assembling another surface in this state. Become.
[0029]
At the ceiling of the dryer machine frame 1, a handle 51 is formed in a grain throwing part 50 connected to the upper part of the elevator 5 and forming a grain guide passage. As a result, there is an effect that safety can be secured by extending one hand to the handle 51 when working at a high place on the ceiling. By providing such a handle over the entire longitudinal direction of the casing member of the upper transfer device in the ceiling or over a part thereof, it is possible to deal with a wide working range.
[0030]
In addition, in the above-mentioned embodiment, it is configured by drying with burner hot air, but the infrared radiator installed in the drying chamber or cereal collection chamber is heated with the burner hot air, and the grains are dried using infrared radiant heat and waste hot air. Can also be used.
[Brief description of the drawings]
FIG. 1 is a front view of a grain dryer.
FIG. 2 is a front sectional view of a grain dryer.
FIG. 3 is a front view of a board.
FIG. 4 is a control block diagram.
FIG. 5 is a flowchart.
FIG. 6 is a flowchart.
FIG. 7 is a sectional view of a feeding valve.
FIG. 8 is a side sectional view of panel assembly.
FIG. 9 is a perspective view of panel assembly.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Dryer frame, 2 ... Storage room, 3 ... Drying room, 4 ... Grain collection room, 5 ... Elevator, 6 ... Burner, 7 ... Suction fan, 15 ... Spreading plate, 24 ... Moisture meter, 29 ... Fan motor, 30 ... Diffusion motor, 31 ... Force switch

Claims (2)

A grain dryer in which the storage chamber 2, the drying chamber 3, and the grain collection chamber 4 are stacked in this order, and are configured to circulate the grains by driving the elevator 5, and the grains passing through the drying chamber 3 are dried by hot air. In addition, the rotational speed of the diffusion plate disposed on the ceiling portion of the storage chamber can be changed, and the hot air chamber and the exhaust chamber that are configured with the grain flow passage in the drying chamber 3 are sandwiched between the exhaust chamber and the exhaust chamber. It is configured to change the rotation speed of the suction fan that communicates, and it has a silent mode that stops the rotation of the rotating diffuser during a preset time period and changes the suction fan rotation to a predetermined rotation speed or less. A grain dryer configured to switch from the normal drying mode to the silent mode on condition that the grain moisture is equal to or less than a predetermined moisture value or a predetermined time or more has elapsed after the start of drying. A grain dryer in which the storage chamber 2, the drying chamber 3, and the grain collection chamber 4 are stacked in this order, and are configured to circulate the grains by driving the elevator 5, and the grains passing through the drying chamber 3 are dried by hot air. In addition, the rotational speed of the diffusion plate disposed on the ceiling portion of the storage chamber can be changed, and the hot air chamber and the exhaust air chamber that are configured to sandwich the grain flow passage of the drying chamber 3 are arranged in the exhaust chamber. It is configured to change the rotation speed of the suction fan that communicates, and it has a silent mode that stops the rotation of the rotating diffuser during a preset time period and changes the suction fan rotation to a predetermined rotation speed or less. A grain dryer configured to switch from the normal drying mode to the silent mode on condition that the grain tension is equal to or less than the predetermined tension.

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