JP2008175415A - Grain drier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a circulation type grain drier capable of detecting a moisture value of every grain layer and drying the grain while equalizing the dispersion of moisture values by mixing upper and lower grain layers. <P>SOLUTION: In this grain drier where grain is circulated through a storage chamber 2, a drying chamber 3 and a grain collecting chamber 4, the drying chamber 3 is provided with a plurality of right and left grain flow-down passages 9, feed-out valves 10 for feeding out the grain are respectively disposed at lower portions of the plurality of right and left grain flow-down passages 9, a moisture detecting means SE5 is disposed for detecting the moisture value of the grain during circulation, the charged dry grain is divided into the plurality of grain layers LV1-LV10, and a representative moisture value of each of grain layers LV1-LV10 is detected by a control portion 41, wherein the plurality of feed-out valves 10, 10 are rotated and driven at different speeds when a dispersion state of the representative moisture values of the grain layers LV1-LV10 is determined to be outside of a set range. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a grain dryer.

In the circulation type grain dryer, a feeding valve is provided at the lower part of the plurality of grain flow passages to feed the grains from the flow down passage forward and backward by a feed motor, and the moisture is dried while feeding the grains every predetermined amount. There is provided a detection means and a variation calculation means for calculating a variation in moisture based on the detection data. When the detected moisture value is equal to or greater than a predetermined moisture value and the moisture variation is equal to or greater than a predetermined value, the moisture variation is determined. It is well known that a feed control means is provided to change the continuous drive rotational speed of the feed valve until the value becomes equal to or less than a predetermined value, and the mixing grain amount from the flow-down passage is changed to promote mixing (Patent Document 1).
JP 2001-183060 A

  Since the grains harvested from different fields are sequentially put into the circulation type grain dryer, the moisture value may be different for each grain layer. In the present invention, when there is a variation in moisture value for each grain layer, the upper and lower grain layers are mixed and dried while equalizing the moisture value to improve the finishing drying accuracy.

  The invention of claim 1 is a grain dryer in which grains circulate in a storage chamber (2), a drying chamber (3), and a cereal collection chamber (4). A moisture detecting means (9) for providing a passage (9), and for providing a feeding valve (10) for feeding out the grain at the lower part of each of the left and right grain lowering passages (9) to detect the moisture value of the circulating grain. SE5) is provided, and the dried dry grain is divided into a plurality of grain layers (LV1 to LV10), and the representative moisture value for each grain layer (LV1 to LV10) is detected by the control unit (41). When the variation state of the representative moisture values of the grain layers (LV1 to LV10) is determined to be outside the set range, the plurality of feeding valves (10, 10) are configured to rotate at different speeds. Cereal dryer.

  According to the said structure, if a grain is stuck in a circulation type grain dryer, the representative moisture value of each of several grain layers (LV1-LV10) will be detected by a moisture detection means (SE5). And when the moisture variation of the representative moisture value of the grain layer is outside the set range, the feeding valves (10, 10) rotate at different speeds, and different amounts of grain are left from the left and right grain flow passages (9). By being fed out, the grains of the upper and lower grain layers are mixed.

  The invention of claim 2 is a grain dryer in which grains circulate in a storage chamber (2), a drying chamber (3), and a cereal collection chamber (4). A moisture detecting means (9) for providing a passage (9), and for providing a feeding valve (10) for feeding out the grain at the lower part of each of the left and right grain lowering passages (9) to detect the moisture value of the circulating grain. SE5) is provided, and when the moisture detecting means (SE5) detects a value equal to or lower than the set moisture value, the feeding valve (10) is driven to rotate at different speeds.

  According to the above configuration, when the grain is put into the circulation type grain dryer, the moisture value of the grain is detected by the moisture detection means (SE5), and the moisture detection means (SE5) detects the set moisture value or less. The feeding valve (10) is rotationally driven at different speeds.

In the invention of claim 1, when there is a large variation in the moisture value of the stuck grain, the grain layer is broken up and down to mix the grain and dry it while equalizing the grain moisture value. it can.
In the invention of claim 2, when the feeding valve (10) is rotationally driven at a different speed when the grain is high in moisture, the grain in the grain lowering passage (9) on the side of the feeding valve (10) having the lower speed is stagnant. There was a disadvantage that it was steamed, but after drying to some extent, rotating the feeding valve (10) at different speeds to prevent the steaming of the grain while preventing the grain variation of the grain layer (LV1 to LV10) Can be eliminated.

Embodiments of the present invention will be described below with reference to the drawings.
First, based on FIG.1 and FIG.2, the whole structure of the circulation type grain dryer which implements this invention is demonstrated.

  Reference numeral 1 denotes a machine frame of a grain dryer. In this machine frame 1, a storage room 2 for storing grains, a drying room 3 for drying grains, and a grain collection room 4 through which the grains dried in the drying room 3 pass. Are sequentially arranged from above to below. The drying chamber 3 has a plurality of grain flow passages 9 arranged side by side as viewed from the front of the machine body, and a hot air chamber 6 through which the hot air of the burner 5 passes is disposed between the inner grain flow passages 9. The left and right outer sides of the grain flow passage 9 are respectively provided with exhaust air chambers 8 leading to the suction exhaust fan 7, and the grain flow passage 9 is provided with a feeding valve 10 at the lower end thereof.

  For example, as shown in FIG. 6, the feeding valve 10 has upper and lower opening grooves 10 a and 10 b having a predetermined width on the upper and lower sides of the cylindrical body along the axial direction, and the upper and lower opening grooves 10 a and 10 b of the feeding valve 10. , In a state of facing up and down, and by a control output to the feed valve motor M3, first, it is rotated forward 360 degrees clockwise, and the grain lowering passage formed mainly in a V shape during the upward rotation of the lower opening groove 10b While taking the grain of the left part of 9, it becomes a position which becomes downward, and the grain is discharged to the collection room 4. Subsequently, it is rotated 360 degrees in the counterclockwise direction, and it is configured to be in a downward position while taking in the grain on the right side of the grain flow down passage 9 and to discharge the grain to the collection chamber 4.

  Then, the feeding valve 10 is rotated forward, stopped, reversely rotated, and stopped for a predetermined time every predetermined time, and the grain is retained in the grain flow passage 9 and dried by hot air for a predetermined time, and thereafter the feeding valve. 10 is driven to flow down and discharge the grain, and the next dry grain layer waiting in the storage chamber 2 is replaced and dried sequentially.

  On the outer side of the machine frame 1, an elevator 11 is erected so that the grains collected on one side of the front and rear sides of the grain collection room 4 are returned to the storage room 2. In this elevator 11, a bucket belt 13 is wound around a driving pulley 12 a and a driven pulley 12 b that are vertically pivoted, and the dried grain is transferred to the front and rear side by a lower conveying device 14 provided at the bottom of the cereal collection chamber 4. 11 is configured to cereal. The grains that have been cerealed by the elevator 11 are supplied from the throw port of the elevator 11 to the start end side of the upper transport device 16, and are further fed laterally by the upper transport device 16 to be disposed in the upper central portion of the storage chamber 2. It is configured to be sent to the diffusion plate 18 and diffused and dropped into the storage chamber 2.

  The grain circulation system composed of the elevator 11, the lower transport device 14, and the upper transport device 16 is driven by an elevator motor (not shown) disposed on the upper frame of the elevator 11. In addition, an intake port (not shown) is provided in the space between the upward and downward strokes of the bucket belt 13 on the wall surface in the middle part of the elevator 11 and the moisture sensor SE5 is provided below the intake port (not shown). Is detachably disposed. The moisture sensor SE5 is a known sensor that compresses and pulverizes sample grains one by one between a pair of electrode rolls, and electrically converts the resistance value into a moisture value of the grain.

Next, the operation of the grain dryer will be described.
A predetermined amount of grain is put into the storage chamber 2 by using the elevator 11 from a holding hopper (not shown). Next, the grain type, dry finish moisture value, etc. are set, and the drying operation is started. Grains in the storage chamber 2 flow down through the drying chamber 3 and flow down into the collection chamber 4 while taking hot air. The cereal dried by the hot air is transferred to one side by the lower conveying device 14, then cerealed by the elevator 11, taken over by the upper conveying device 16, and circulated again to the storage chamber 2, and undergoes a tempering action for a while. . When the finishing moisture value is reached while repeating such a process, the drying operation is finished.

Next, a control block configuration will be described with reference to FIG.
A controller (CPU) 41 is provided in a control box 45 provided above the burner wind tunnel 25. Various switches and sensors are connected to the input side of the controller 41. On the input side of the controller 41, an extension switch SW0, a ventilation drying switch SW1, a drying switch SW2, a discharge switch SW3, a stop switch SW4, a timer increase switch SW9, a timer decrease switch SW10, and an emergency stop switch 11 are connected. Further, an outside air temperature sensor SE1, a hot air temperature sensor SE2, an exhaust air temperature sensor SE3, a moisture meter electrode temperature sensor SE4, a moisture sensor SE5, and a tension amount sensor SE6 are connected via an input circuit.

  The controller 41 is connected with a grain type setting switch SW7, a moisture value setting switch SW8, and an overhang amount setting switch SW9 via an input circuit, and also with a grain display device 34b, a moisture display device 35a, via an output circuit. The tension amount display device 36b is connected.

  Further, on the output side of the controller (control unit) 41, a blower motor M1, an elevator motor M2, a feed valve motor M3, a burner combustion motor burner fan motor (not shown), and a burner vaporizing cylinder motor (not shown) are connected via an output circuit. Omission), an electromagnetic pump for fuel supply (not shown), a fuel valve (not shown), an igniter (not shown), a moisture meter motor (not shown), and a digital display of various display items via an output circuit A display unit 32 for displaying, an abnormality display monitor 33 for displaying various abnormalities of the grain dryer, and the like are connected.

  The burner drive signal of the controller 41 includes an ON / OFF signal and a large / small supply signal of an electromagnetic pump (not shown), a rotation speed command signal of a burner vaporizing cylinder motor (not shown), a rotation speed command signal of a burner fan motor (not shown), There is an energization signal or the like of an igniter (not shown), and the fuel supply amount, the combustion air supply amount, and the vaporizing cylinder rotational speed are controlled in synchronization to vaporize and burn the liquid fuel.

  Also, during the drying operation, the hot air set temperature preset and stored is compared with the hot air temperature detected by the hot air temperature sensor SE2, and the electromagnetic waves for fuel supply that are periodically turned on so as to reduce the difference are compared. The drying operation is performed while changing the on-time signal of a pump (not shown) to be longer or shorter, and when the grain moisture reaches the target moisture value, the drying operation is stopped.

Next, the moisture value detection and display configuration will be described.
Dried kernels vary in moisture levels due to factors such as the degree of lodging of harvested cereals and the early and late harvesting times. Noodle grains may form different moisture values depending on the tension layer. Under such circumstances, a variation occurs in the grain layer whose moisture value is measured, and there arises a problem that the drying operation is terminated as a whole by being overdried or not dried. This embodiment is intended to solve such a problem.

  When the tension of the grain is finished, the weight 40 suspended by the string is lowered and brought into contact with the upper surface of the tension grain to detect the amount of the tension grain. Is detected, or when the amount of tension is set by the amount of tension setting switch SE9, the detection setting tension amount, the amount of dry grains in the drying chamber 3, the timing of feeding the feeding valve 10, the feeding speed, Based on a predetermined calculation formula, the number of dry grain layers (LV1 to LV10) with the total amount of penetration, the time (n) required for one cycle of the drying operation with the total amount of insertion, and the number of measurements (M) are calculated and determined. (FIG. 5). As shown in FIG. 1, in the case of full grain filling, the dry grain layer is set to LV10.

Here, the grain layer is to make it easy to grasp the variation state of the stretched grain by regarding the stretched grain as a plurality of layers for convenience in the vertical direction.
When the drying switch SW2 is turned ON and the drying operation is started, each grain passes through the drying chamber 3 and the collection chamber 4 and circulates once in the storage chamber 2 in accordance with FIG. A predetermined number of sample grains (for example, 32 grains) is taken into the moisture sensor SE5 from the layers (LV1 to LV10), the sample grains are compressed and pulverized one by one between a pair of electrode rolls, and the resistance value is electrically processed. The variation maximum moisture value, the variation minimum moisture value, and the average moisture value are calculated and stored in the storage device, and the variation maximum moisture value, the variation minimum moisture value, and the average moisture value for each dry grain layer are sequentially displayed on the display unit 32. indicate. In addition, FIG. 4 has shown the example of a detection of the average moisture value used as the representative moisture value for every grain layer (LV1-LV10).

  According to this configuration, the whole grain in the grain dryer is divided into grain layers (LV1 to LV10), and variations in moisture values and representative moisture values in each grain layer (LV1 to LV10) are calculated and displayed. You can see the variation of the whole grain. Therefore, for each grain layer (LV1 to LV10), it is possible to know the degree of variation and the degree of undried or overdried, and appropriate drying response according to the grain layer (LV1 to LV10), for example, high It is possible to take measures such as increasing the combustion amount of the burner 5 to accelerate drying when the grain layer of moisture is dried, and uneven drying can be prevented.

Next, the feeding control of the feeding valve 10 of the present invention will be described.
In this control, when the grain layer of the stretched grain has moisture unevenness outside the set range, the feed valve 10 is repeatedly dried so as not to leave the moisture unevenness, and the feeding valve 10 repeats normal rotation and reverse rotation for the same time. From the normal feeding drive, the length of the forward rotation time and the reverse rotation time is changed, and the unevenness of moisture is attempted to be mixed by mixing the adjacent grain layer layers.

  The drive of the feeding valve 10 during the normal drying operation is performed by repeating the forward / reverse drive at the same cycle, and changing the drive time and the stop time according to the grain type of straw and wheat to change the circulation amount. I have to.

  The present applicant has obtained the following knowledge regarding drying of grains with uneven moisture. That is, when the grain is fed and dried by repeating the forward / reverse drive of the feeding valve 10 in the same cycle in the circulation type grain dryer, in the case of wheat, the unevenness of moisture in the early stage of drying due to good flow and small grain size. Even if there is a slight amount of water, the moisture transfer of grain drying proceeds during the drying operation, and there is almost no moisture unevenness at the end of the drying operation. However, in the case of rice bran, since it does not mix with the whole and there is little moisture transfer by the rice husk, moisture unevenness remains in the dry finish.

Therefore, by changing the forward / reverse drive period of the feeding valve 10 during normal drying, the moisture is eliminated and the grain is dried to the final moisture value while avoiding grain damage.
As shown in FIG. 4, when the drying operation is started, the stretched grain is divided into a plurality of grain layers (LV1 to LV10), the initial moisture value is measured, and the highest moisture value and the lowest value for each grain layer are measured. A moisture value, an average moisture value (representative moisture value), and a standard deviation are respectively calculated, and when the upper and lower values of the representative moisture value of the whole grain layer are equal to or greater than a set range (for example, 3% or more), it is determined that there is variation.

  When it is determined that there is no variation in moisture value, for example, when the amount of grain circulation is 8 tons per hour, the normal payout drive state (normal rotation time t1 is 45 Sec, stop time 2Sec, reverse rotation time) The t2 is 45 Sec and the stop time is 2 Sec), and the grain is fed by the feeding valve 10. Then, as shown in FIG. 8, the left and right kernels staying in the drying chamber 3 are alternately fed out by the same amount, and are fed out and dried in a state where the grains of different grain layers are not mixed.

  Further, when it is determined that there is a variation in the moisture value, the variation elimination feeding drive state (forward rotation time t120Sec, stop time 2Sec, reverse rotation time t264Sec, stop time 2Sec) is set, and the grain is fed out by the feeding valve 10. Then, as shown in FIG. 7, as a result of the grain staying in the grain flow passage 9 being drawn out on the other side more than the other side, the grain layer at the time of stretching collapses in the left-right direction and is different. The grains in the grain layer are fed out and dried while being mixed, and the mixed grain is circulated and stored in the storage chamber 2 as a new grain layer F sequentially.

Thus, the grains in the upper and lower grain layers are sequentially mixed by driving the feeding amount of the grains by the feeding valve 10 to be different on the left and right sides, and the variation is eliminated.
In addition, when it detects that the variation | variation of the representative moisture value for every grain layer becomes in a setting range (for example, 1.5%), or when setting time passes, it controls to return the drive of the delivery valve 10 to right and left same. .

  According to the above configuration, when drying the uneven grain, the left and right grains staying in the drying chamber 3 are fed out more on the other side than the one side by driving the feeding valve 10 in a variation-removing feeding driving state. Thus, the left and right kernels are fed out while being mixed with each other, and the mixing of the kernels is promoted so that the moisture unevenness can be eliminated.

  Further, in the case of drying the uneven grain, the forward rotation time t1 in the dispersion elimination driving state is 20 Sec, the stop time is 2 Sec, the reverse rotation time t2 is 64.3 Sec, the stop time is 2 Sec, and the total time is 88. .6Sec, and the same total feed time in the normal payout drive state, 88.6Sec, may be configured to make the feed amount of the left and right feed valves 10 per cycle the same. If comprised in this way, since the dry calorie | heat amount which a delivery grain receives does not change, drying can be advanced uniformly.

  In addition, when drying the uneven grain, if there is a grain layer of a predetermined moisture value (for example, 20%) or more, the grain is dried while driving the feeding valve 10 in the normal feeding drive state, and all the grain layers May be changed from the normal pay-out driving state to the variation-removing driving state when the water content falls below a predetermined moisture value (for example, 20%). Alternatively, the normal feeding drive state may be changed to the variation elimination driving state after a set time has elapsed from the start of the drying operation (for example, two hours later).

  If comprised in this way, the stagnation time in the grain flow down passage 9 of the grain at the time of high moisture can be shortened, and the fall of the quality by the steaming of a grain can be prevented. FIG. 8 shows an example of the control flow.

  Further, the variation elimination feeding drive of the feeding valve 10 may be configured as follows. When drying the unevenness grain, when the drying operation is started, the initial moisture value of the grain is measured, and the variation maximum moisture value, the variation minimum moisture value, and the average moisture value are calculated. Then, a variation moisture value is calculated from the maximum moisture value and the minimum moisture value, and the calculated variation moisture value and the reference variation moisture value are compared to determine the magnitude of moisture unevenness. Next, the required dry moisture value is calculated from the average moisture value and the target dry moisture value. Based on this required dry moisture value and the standard required dry moisture value required to eliminate the variation, it is determined whether it is difficult to eliminate the unevenness of moisture in the continuous drying operation. judge. If it is determined that it is difficult to eliminate the unevenness of moisture in the continuous drying operation, the drying operation is added to the drying operation (only the outside air is blown without sending the hot air), and the feeding valve 10 is driven in the variation driving operation state. While circulating.

By configuring in this way, even when the moisture value at the start of drying is close to the target moisture value, it is possible to finish the target moisture value while eliminating unevenness in moisture.
Further, the variation elimination feeding drive of the feeding valve 10 may be configured as follows. When drying the unevenness grain, when the drying operation is started, the initial moisture value of the grain is measured, and the variation maximum moisture value, the variation minimum moisture value, and the average moisture value are calculated. Then, a variation moisture value is calculated from the maximum moisture value and the minimum moisture value, and the magnitude of moisture unevenness is determined from the calculated variation moisture value and the reference variation moisture value. Then, depending on the size of the moisture unevenness, long and short drying suspension times are provided, and during this drying suspension time, the moisture unevenness is eliminated while the feeding valve 10 is driven in the variation driven delivery state while ventilation drying is performed. To promote mixing.

According to the said structure, even when the moisture value at the time of a drying start is close to a target moisture value, it can finish to a target moisture value, increasing the circulation amount of a grain and eliminating moisture irregularity.
Further, the variation elimination feeding drive of the feeding valve 10 may be configured as follows. When drying the unevenness of the grain, the initial operation is performed while the feeding valve 10 is driven in the normal feeding driving state until the predetermined time elapses from the start of the drying operation (or the intermediate moisture value lower than the finished moisture value by the predetermined moisture value). Normal drying work. Next, the intermediate moisture value of the grain is measured, the variation maximum moisture value, the variation minimum moisture value, and the average moisture value are calculated, respectively, the variation moisture value is calculated from the maximum moisture value and the minimum moisture value, and the calculated variation moisture value and The level of moisture unevenness is determined from the reference variation moisture value. And, according to the size of the unevenness of moisture, a long and short drying suspension time is set, and while the drying drying time is ventilated, the feeding valve 10 is driven in a dispersion-removing driving state to promote mixing of the grains. Dry the kernels.

According to the said structure, the amount of circulation of a grain can be increased, preventing excessive drying of a grain, and it can finish to a target moisture value, eliminating a water nonuniformity.
At the end of the set drying pause time, the dried grain is divided into a plurality of grain layers, the intermediate moisture value of the grain is measured, and the variation maximum moisture value, the variation minimum moisture value, and the average moisture value are respectively calculated. Alternatively, the variation moisture value may be calculated from the maximum moisture value and the minimum moisture value, and the feeding valve 10 may be driven in the variation elimination driving state only for the grain layer with moisture irregularity in order to eliminate the moisture irregularity. Good. By comprising in this way, the cancellation | release precision of a moisture nonuniformity can be raised.

  Next, the moisture value at the end of the drying operation may be displayed as follows. At the time of the moisture value (for example, about + 1.5%) in the set range of the dry finish moisture value, the total dry grain in the dryer is divided into a plurality of blocks, and the moisture value of each block is measured. Measure the mean average moisture value. When the moisture value becomes the finished moisture value and the drying operation is completed, the moisture value reduced by “1.5%” from the intermediate average moisture value is displayed on the display unit 32 as the finished moisture value. According to the said structure, a moisture value display can be made quick at the time of completion | finish of drying.

  Moreover, you may comprise as follows. At the start of the drying operation (or during the drying operation or at the end of the drying operation), each moisture value is measured and grasped. The control panel is provided with a high moisture partial discharge switch (not shown) and a low moisture partial discharge switch (not shown), and is a desired portion based on the grain feeding speed of the feeding valve 10 and the moisture value information of a plurality of grain layers. When the grain of the high moisture value part or the grain of the low moisture value part reaches the discharge funnel 41 (shown in FIG. 2) of the upper transport device 16, the discharge valve 41a is opened, and only the grain of the desired part is obtained. Discharge. In addition, you may comprise so that the moisture value for every grain layer at the time of completion | finish of drying work may be displayed on the display part 32. FIG.

  In addition, when the moisture value for each grain layer is displayed in a graph on the display unit 32, when the moisture unevenness remains, the additional drying time required for eliminating the moisture unevenness is also displayed. If no unevenness remains, it may be displayed that ventilation circulation drying is not necessary.

  According to the said structure, a high moisture value grain part or a low moisture value grain part is discharged | emitted, and only the grain in which the moisture value was equalized is collected, and an operator knows the moisture value for every grain layer. be able to.

Next, another embodiment of the drying control will be described.
This embodiment relates to a drying method in which a grain containing a large amount of blue rice is temporarily stopped in the middle of the drying operation and finish-dried at a later date.

  At the start of the drying operation (or during the drying operation), the grain in the grain dryer is divided into a plurality of grain layers, and the moisture unevenness is measured and grasped. When the drying operation is stopped at an intermediate moisture value (for example, 18 to 20% in the case of straw), the reference variation moisture value, the variation maximum moisture value of each grain layer, the variation minimum moisture value, and The average moisture value is compared, and when the variation is large, a ventilation drying operation for a predetermined time is additionally executed according to the variation, and then the drying operation is temporarily stopped.

According to the said structure, the decay and discoloration of the grain at the time of a drying stop can be prevented, promoting the drying of a high moisture grain and reducing a water nonuniformity.
Since the feeding valve 10 of the present embodiment is provided with one at the lower ends of the two grain flow passages 9 formed in a V-shape, the control is performed to change the cycle because it is configured to rotate forward and backward. In the configuration in which one feed valve 10 is provided for each grain flow down passage 9, the feed speed of the feed valve 10 may be different on the left and right sides to mix the grains of different grain layers.

Cutting front view of grain dryer Grain dryer cutting side view Control block diagram Moisture value measurement data of the present invention The figure which showed the amount of the moisture value measurement in the amount of cereal grains, the circulation time, and the circulation time immediately after the start of drying Perspective view of feeding valve Front view showing grain feeding state of grain dryer flowchart

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Grain dryer 2 Storage chamber 3 Drying chamber 4 Grain collection chamber 5 Burner 6 Hot air chamber 7 Suction exhaust fan 8 Ventilation chamber 9 Grain flow passage 10 Feeding valve 41 Unevenness detecting means 41 Normal unwinding driving means 41 Unevenness unwinding feeding means M3 Feed valve motor SE5 Moisture detection means SE5 Dispersion detection means

Claims (2)

  In the grain dryer in which the grains circulate through the storage chamber (2), the drying chamber (3), and the cereal collection chamber (4), the drying chamber (3) is provided with a plurality of left and right grain flow passages (9), A feeding valve (10) for feeding out the grain is provided at the lower part of each of the left and right grain flow passages (9), and a moisture detecting means (SE5) for detecting the moisture value of the circulating grain is provided. The dried grain is divided into a plurality of grain layers (LV1 to LV10) and the representative moisture value for each grain layer (LV1 to LV10) is detected by the control unit (41), and the grain layer (LV1) ~ LV10) Grain dryer characterized by having a configuration in which the plurality of feeding valves (10, 10) are rotationally driven at different speeds when the variation state of the representative moisture value of LV10) is determined to be outside the set range.   In the grain dryer in which the grains circulate through the storage chamber (2), the drying chamber (3), and the cereal collection chamber (4), the drying chamber (3) is provided with a plurality of left and right grain flow passages (9), A feeding valve (10) for feeding out the grain is provided at the lower part of each of the left and right grain flow passages (9), and a moisture detecting means (SE5) for detecting the moisture value of the circulating grain is provided. A grain dryer characterized in that, when the detection means (SE5) detects a value below the set moisture value, the feeding valves (10, 10) are rotationally driven at different speeds.

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