JP2016061479A - Grain drier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform a positive retention of returning of water content value of grain after finishing of drying reached to a dryness target water content value at a grain drier.SOLUTION: This invention relates to a grain drier comprising drying work finishing control means for measuring a water content value of grain dried by hot air generated by a burner 5 with a moisture meter 6, stopping the combustion at the burner 5 upon reaching of the measured water content value to a dried target water content to finish the hot air drying work. The grain drier comprises moisture returning correction control means. When the water content is measured while circulating the grain in the drier after finishing of the drying work based on the drying work finishing control means and the measured water content value exceeds the dried target water content upon finishing of the drying work, the moisture returning correction control means executes a circulating and drying work in a state where the burner 5 is kept stopped and a suction discharging fan 7 is driven or stopped, and when the measured water content value reaches the dried target water content, the moisture returning correction control means stops the circulating and drying work.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a grain dryer.

  Measure the moisture value of the grains to be dried with hot air from the burner with a moisture meter, and when the measured moisture value matches the moisture value set by the stop moisture value setting means, stop burning the burner and dry In the grain dryer having the drying end control means for ending the drying, the pause drying control means for stopping the combustion of the burner at a predetermined timing during the drying and performing the pause drying, and re-burning the burner after a predetermined time has elapsed, and the pause Read each measured value of the moisture value at the start and end of the rest drying by the drying control means, return moisture value detecting means for detecting the return of moisture from both measured values, and the stopped moisture according to the returned moisture value A stop moisture correction apparatus provided with a stop moisture value correction means for correcting a stop moisture value set by a value setting means is known (Patent Document 1).

Japanese Patent Publication No. 7-89023

  The invention of the prior art relates to a stop moisture value correction device for a grain dryer, which performs a pause drying for a predetermined time during which a burner is stopped during a hot air drying process, and starts and ends the pause drying. The return of the moisture value at a predetermined time after the drying is predicted from the measured moisture value, the predicted return moisture value is added to the target dry moisture value, the target dry moisture value is changed and set, and the hot air drying operation is resumed.

  Therefore, when the predetermined time elapses after the drying operation ends due to the weather change after the drying operation and the quality of the dried cereal such as the ratio of immature rice, the return moisture value changes unexpectedly and the drying target moisture value is maintained. It may not happen.

In such a case, the operator must restart the drying operation so as to reach the drying target moisture value, and there arises a problem that the hulling operation cannot be performed quickly.
The present invention is intended to solve such problems, and in a drying control device of a grain dryer, the grain is circulated in the machine after completion of drying when the drying target moisture value is reached, and the return state of the moisture value is measured. However, when the moisture value is returned, the above-mentioned problem is solved by additional drying and returning to the dry target moisture value.

The present invention has taken the following technical means in order to solve the above problems.
In the invention of claim 1, the moisture value of the grain dried with the hot air generated by the burner 5 is measured by the moisture meter 6, and when the measured moisture value reaches the drying target moisture value, the combustion of the burner 5 is stopped and the hot air drying operation is performed. In the grain dryer having the drying operation end control means to be finished, after the drying operation based on the drying operation end control means, the moisture value is measured while circulating the grain in the machine, and the measured moisture value is determined when the drying operation is completed. If the measured moisture value reaches the drying target moisture value, the circulation drying operation is stopped when the burner 5 is stopped and the suction exhaust fan 7 is driven or stopped. It is set as the return moisture correction apparatus of the grain dryer provided with the moisture return correction control means to perform.

  According to a second aspect of the present invention, in the first aspect of the invention, the water content is measured a plurality of times during one circulation of the in-flight grain in the moisture return correction control means, and the return water value is determined by the average value. It is set as the return moisture correction apparatus of the grain dryer characterized by calculating.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the moisture value is measured by the moisture return correction control means every predetermined set time after the drying operation, and the return moisture value relative to the drying target moisture value is determined. It is set as the return moisture correction apparatus of the grain dryer characterized by confirming.

  According to a fourth aspect of the present invention, in any one of the first to third aspects of the present invention, a moisture return correction operation unit SW12 that automatically executes the moisture return correction control unit after the drying operation is provided. It is set as the return moisture correction apparatus of the grain dryer characterized by the above.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to third aspects, in the measurement of the return moisture value at the time of the execution of the moisture return correction control means, the return is higher than the set target moisture value by the drying target moisture value. If there is, the return moisture correction device for a grain dryer is characterized in that a hot air drying operation in which the burner 5 is combusted is started instead of the circulation drying operation.

  According to the invention of claim 1, based on the characteristic configuration of the claims, it is possible to correct the return of moisture with respect to the drying target moisture value after the completion of the drying operation and to quickly perform the hulling operation of the next process. it can. The drying operation of the grain dryer ends at night, and the hulling work is often performed the next day. Even in such a case, the hulling work can be performed as scheduled.

  According to the invention of claim 2, in addition to the effect of the invention of claim 1, the return moisture value after the completion of the drying operation is calculated based on the characteristic configuration of the claim, the weather and time zone after the completion of the drying operation Can be measured with high accuracy.

  According to the invention of claim 3, in addition to the effects of the invention of claim 1 or 2, in addition to the above-mentioned effect of the invention of claim 1, the case of storing grains for a long time with a grain dryer It is possible to stably maintain the grain moisture value at the drying target moisture value and maintain good grain quality.

  According to the invention of claim 4, in addition to the effect of the invention of any one of claims 1 to 3, in accordance with the characteristic configuration of the claims of claim 1, when the drying operation is completed at night, moisture By operating the return correction operation means SW12 in advance, the operator does not need to operate after the drying operation is completed, and the operation can be simplified.

  According to the invention of claim 5, in addition to the effect of the invention of any one of claims 1 to 3, based on the characteristic configuration of the claims, the dried grain is stored in the grain dryer for a long period of time. Even in the case where the return of the moisture value is large, the returned moisture value can be quickly dried and returned to the dry target moisture value, so that the grain quality can be maintained well.

A cut side view of a grain dryer. The cutting front view of a grain dryer. The front view of an operation panel. The figure which shows the display content of an operation panel. The figure which shows the display content of an operation panel. Control block diagram. flowchart. The perspective view of a grain dryer. Block diagram of a grain dryer.

An embodiment specifically configured based on the technical idea 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 comprises this invention is demonstrated.

  Reference numeral 1 denotes a machine frame of a dryer. In the machine frame 1, a storage chamber 2, a drying chamber 3, and a grain collection chamber 4 are sequentially arranged from the upper side to the lower side. A plurality of left and right grain flow passages 9, 9 are formed in the drying chamber 3, and a hot air chamber 6 leading to the burner wind tunnel 25 of the burner 5 is disposed on one side of the left and right grain flow passages 9, 9; Exhaust chambers 8, 8 communicating with the fan body 7 a of the suction exhaust fan 7 are arranged on the other side of the left and right grain flow passages 9, 9, and the feeding valve 10 is provided at the lower end of the left and right grain flow passages 9, 9. Is provided.

  On the outer side of the machine frame 1, an elevator 11 is erected to reduce the grains collected on the front and rear sides of the cereal collection chamber 4 to the storage chamber 2. The bucket belt 13 is wound around the upper and lower drive pulleys and driven pulleys in the elevator 11, the dried grains are transferred to the front and rear sides by the lower transport device 14 provided at the bottom of the cereal collection chamber 4, and the cereal is lifted by the elevator 11. . The grains that have been cerealed by the elevator 11 are supplied to the starting end side of the upper conveying device 16, and are further fed laterally by the upper conveying device 16 and sent to the rotary diffusion plate 18 disposed in the upper center of the storage chamber 2. Diffusion and fall into 2.

  The grain circulation system composed of the feeding valve 10, the elevator 11, the lower conveying device 14, and the upper conveying device 16 is driven by an elevator motor 29 disposed on the lower rear side of the machine body. Further, a moisture meter 26 is provided on the wall surface of the elevator 11 in the middle of the upper and lower parts, sample grains are taken in from intake ports (not shown) provided in the interval between the ascending stroke and the descending stroke of the bucket belt 13, and the moisture value is measured. . The moisture meter 26 is a known one that compresses and pulverizes sample particles one by one between a pair of electrode rolls, and electrically converts the resistance value into a moisture value for each particle.

  A far-infrared radiator 23 is disposed in the drying chamber 3 located at the left and right intermediate portions of the left and right grain flow passages 9 and 9. The far-infrared radiator 23 covers the inner far-infrared radiator 23a and the inner far-infrared radiator 23a along the front-rear direction disposed in the hot air chamber 6 so as to face the combustion surface of the burner 5. The outer far-infrared radiator 23b.

  A far-infrared radiation paint is applied to the inner far-infrared radiator 23a and the outer far-infrared radiator 23b, and the hot air that has passed through the inner and outer far-infrared radiators 23a and 23b is blown from the countless small holes to the left and right, The left and right grain flow passages 9, 9 are subjected to far-infrared radiant heat to promote the drying of the grains.

  The hot air generated by the burner 5 passes through the inner far-infrared radiator 23a and the outer far-infrared radiator 23b by the pressure air action of the burner blower fan (not shown) and the suction action of the suction exhaust fan 7, and passes through the hot air chamber 6 into the hot air chamber 6. Supplied as Subsequently, the hot air dries the grain while flowing through the left and right grain flow down passages 9 and 9 and the left and right exhaust air chambers 8 and 8, and is sucked and discharged outside the apparatus by the suction exhaust fan 7.

  As shown in FIGS. 1 and 8, a control box 35 is provided above the burner wind tunnel 25, and an operation panel 36 is provided on the front side surface of the control box 35. As shown in FIG. 3, the operation panel 36 includes a tension switch SW1 for tension operation, a ventilation switch SW2 for ventilation drying operation, a drying switch SW3 for hot air drying operation, a discharge switch SW4 for grain discharge operation, and an operation. A stop switch SW5 for stopping and an emergency stop switch SW6 are provided.

The operation panel 36 is provided with an operation display screen 36a for sequentially switching and displaying the detected hot air temperature during the drying operation, the measured moisture value, the remaining time until the end of the drying operation, and the like.
Further, as shown in FIG. 4, the operation panel 36b of the operation panel 36 has a grain type switch SW7 for setting the grain type, an overhang amount switch SW8 for setting the overhang amount, and a moisture switch SW9 for setting the reaching target moisture value. , A drying speed switch SW10 for setting the drying speed, a drying mode switch SW11 for setting the drying mode, and a moisture return correction switch SW12 for correcting the return of the moisture value, and a display unit for displaying the setting contents on the right side of these switches. Provided.

  The grain dryer has a hot air temperature detection sensor SE1 for detecting the temperature in the hot air chamber 6, an exhaust temperature sensor SE2 for detecting the temperature in the exhaust air chamber 8, an outside air temperature sensor SE3 for detecting the outside air temperature, and an outside air humidity. An outside air humidity sensor SE4 to detect and a grain temperature sensor SE5 to detect the temperature of the grain flowing down through the grain flow passage 9 are provided.

  The control box 35 is provided with a control unit 38. As shown in FIG. 6, various switches and sensors are connected to the input side of the control unit 38, and suction is performed on the output side via an output circuit and a drive circuit. Exhaust fan motor (not shown), elevator motor 29, feed valve motor (not shown), burner driving means (not shown), moisture meter driving means (not shown), tension display lamp L1 for displaying the operating state, ventilation display The lamp L2, the dry display lamp L3, the discharge display lamp L4, and the like are connected.

Next, an outline of the drying operation of the grain dryer will be described.
When the operator operates the tension switch SW <b> 1, the elevator 11 and the upper spiral 16 are driven, and the tension grains are sequentially tensioned in the storage chamber 2. When the tensioning operation is completed, the operator operates the tensioning amount switch SW8 to set the tensioning grain amount (even if the tensioning amount detecting means (not shown) automatically detects and sets the tensioning amount). Good). Next, the moisture switch SW9 is operated to set the target moisture value (for example, 14%), then the grain switch SW7 is operated to set the grain to be dried, the drying speed switch SW10 is operated to set the drying speed, and the drying is performed. The mode switch SW11 is operated to set the presence / absence of ventilation drying and pause drying to set the drying mode.

  Next, when the drying switch SW3 is operated, the burner 5 starts burning based on the hot air drying operation command of the control unit 38, and the driving of the circulation system of the feeding valve 10, the lower spiral 14, the elevator 11, and the upper spiral 16 is started. Hot air drying operation is started. Next, a hot air drying operation is performed while the amount of combustion of the burner 5 is adjusted according to conditions such as the amount of grain inserted, the set drying speed, the measured grain moisture value of the moisture meter 26, and the detected outside air temperature, and the measured moisture content of the moisture meter 26 When the value reaches the set drying target moisture value, the combustion of the burner 5 is stopped, the driving of the circulation system is stopped, and the drying operation is ended.

Next, the moisture value return correction control after the hot air drying operation is completed will be described with reference to FIG.
The dried grain is put into the grain dryer (step S1), the drying target moisture value is set by the setting operation of the moisture switch SW9 by the operator, the amount of the putting grain is set by the operation of the setting amount switch SW8, and the drying speed is set. The drying speed is set by operating the switch SW10, and the drying mode is set by operating the drying mode switch SW11 (step S2).

  Next, when the operator turns on the drying switch SW3 (step S3), the burner 5 is ignited based on the hot air drying work start command of the control unit 38 and the hot air drying work is started (step S4). Next, when the drying operation proceeds and the measured moisture value of the moisture meter 26 reaches the drying target moisture value (step S5), the hot air drying operation is terminated (step S6).

  Next, when the operator turns on the moisture return correction switch SW12 and selects moisture return correction control before starting the drying operation or after finishing the drying operation (step S7), a predetermined value is determined based on the moisture return correction control command of the control unit 38. The circulation operation is started to circulate the in-machine grain with the suction / exhaust fan 7 being stopped or driven every time, and the measured amount of moisture measured by the moisture meter 26 is displayed on the operation display screen 36a, and the amount of cereal filling and the circulation. Based on the amount, the moisture value is measured a plurality of times at predetermined time intervals during the end of one cycle of the in-machine grain, and the average moisture value is calculated (step S8).

Next, when the average moisture value is higher than the predetermined moisture value and higher than the drying target moisture value (step S9), the ventilation circulation drying operation is executed (step S10), and the process returns to step 9.
If the average measured moisture value is not higher than the drying target moisture value in step 9 (step S9), if the stop switch SW5 or the discharge switch SW4 is turned on by the operator (step S11), the moisture return correction is performed. Control is terminated and the drying operation is terminated. If the stop switch SW5 or the discharge switch SW4 is not turned on by the operator (step S11), the process returns to step 8.

  In the moisture return correction control, for example, a moisture return correction control time setting switch (not shown) that can set an execution interval of moisture return correction control is provided, and the moisture return correction control execution time interval of the control unit 38 is set to 1 hour, for example. The measurement interval may be set every 3 hours or every 3 hours. If it does in this way, according to various weathers, the moisture value of the grain at the time of storage can be stabilized and held.

  In the moisture return correction control, the circulation operation for circulating the grain in the machine is started in the driving stop state or the driving state of the suction exhaust fan 7, and the measured average moisture value in the circulation of the grain 1 is the predetermined moisture value from the drying target moisture value. When the additional drying operation is performed when the value is higher than the value, the predetermined moisture value higher than the drying target moisture value is divided into two stages, for example, upper and lower, and if the drying moisture value is higher than the target moisture value and close to the target moisture value, ventilation circulation drying is executed. However, when it is equal to or higher than the drying target moisture value and is far from the target moisture value, a hot air drying operation by burner combustion may be executed. If it does in this way, return of the moisture value by grain with much outside air humidity or immature rice can be controlled certainly.

  Moreover, you may comprise as follows. In the grain dryer equipped with the moisture return correction control, when the operator operates the moisture switch SW9 to lower the drying target moisture value after completion of the hot air drying operation, the drying is performed based on the additional drying operation function of the control unit 38. From the moisture value at the end of the operation and the drying rate of the drying operation, the additional drying time of the hot air drying operation or the circulation circulation drying is set and the drying operation is started. Then, the contents (drying rate, set additional drying time) at the start of the additional drying operation are displayed on the operation display screen 36a of the operation panel 36, and the measured moisture value (or the aforementioned decreased drying value) is determined every predetermined time as the additional drying progresses. When the measured moisture value reaches the additional drying target moisture value, the drying operation is terminated.

According to the above configuration, it is possible to simplify the operator's additional drying setting operation and improve convenience.
In a grain dryer equipped with automatic drying operation means, if the measured moisture value at the start of the drying operation and the target moisture value are less than a predetermined moisture value (eg 3%), the timer drying operation is automatically performed. It is possible to improve the convenience for the operator by setting the hot air drying operation time or the ventilation circulation drying time from a predetermined drying rate and starting the drying operation.

  In addition, when the operator operates the moisture switch SW9 to set the drying target moisture value to a lower value after the drying operation is completed, the moisture value at the end of the drying operation and the drying value of the drying operation are set based on the additional drying operation function of the control unit 38. The additional drying time of hot air drying operation or circulation circulation drying is set from the rate of decrease, and the drying operation is started. The content of the additional drying operation is displayed on the operation display screen 36a of the operation panel 36, and the measured moisture value is set by additional drying. When the drying target moisture value is reached, the drying operation may be terminated.

Next, a configuration of cereal grain insertion in the grain dryer of the grain drying preparation facility 51 of FIG. 9 will be described.
The grain drying preparation facility 51 includes a plurality of grain dryers 52A, 52B, 52C and a grain embedding pit 53, and the grains harvested by the combiner (not shown) are dried from the elevator 54 of the grain embedding pit 53 to a plurality of grains. The machine 52A, 52B, 52C is configured to be able to be stretched.

  The grain drying adjustment equipment 51 includes a controller (not shown) for operation control, controls the drying operation of the plurality of grain dryers 52A, 52B, and 52C, and sets the conveying direction of the elevator 53 to the plurality of grain dryers. It can be switched.

Further, the combine is provided with a moisture meter so that the moisture value of the harvested cereal can be measured. For example, the moisture value measured by wireless communication can be transmitted to the controller (not shown).
When the grain is carried from the combine into the grain pit 53 and the elevator 54 starts to be fed into the grain dryer, the combine sends moisture value information (for example, a moisture value of 21%) to the controller. A conveyance command is issued to the grain dryer 52A, which is drying the grain having a moisture value of 20% closest to the moisture value among the plurality of grain dryers 52A, 52B, 52C, and the conveyance direction of the elevator 54 is switched. Then, the drying operation is performed together with the cereal being put into the grain dryer 52A and being dried.

  According to the above configuration, grains harvested with a combine can be dried together by putting them in a grain dryer with a dry moisture value close to one another from a plurality of grain dryers, and quickly increasing the drying efficiency while reducing moisture unevenness. Can be dried.

DESCRIPTION OF SYMBOLS 2 Reservoir 3 Drying room 4 Graining room 5 Burner 7 Suction exhaust fan 10 Feeding valve 11 Elevator 14 Lower conveyance device 16 Upper conveyance device 38 Control part SW1 Tension switch SW2 Ventilation drying switch SW3 Drying switch SW4 Discharge switch SW5 Stop switch SW12 Moisture return correction operation means (moisture return correction switch)

Claims (5)

  Measured moisture content of grain dried with hot air generated by burner, and equipped with drying operation end control means to stop burning of burner and end hot air drying operation when measured moisture value reaches drying target moisture value In the grain dryer, when the moisture value is measured while circulating the grain in the machine after the drying operation based on the drying operation end control means is finished, and the measured moisture value exceeds the drying target moisture value at the end of the drying operation, Grain dryer equipped with moisture return correction control means for executing a circulation drying operation with the burner stopped and driving or stopping the suction exhaust fan and stopping the circulation drying operation when the measured moisture value reaches the drying target moisture value .   The invention according to claim 1 is characterized in that the water content is measured a plurality of times during one circulation of the in-machine grain during the measurement of the water content returned by the moisture return correction control means, and the return water value is calculated from the average value. Grain dryer.   In the invention of claim 1 or 2, the moisture value is measured by the moisture return correction control means every predetermined set time after the drying operation is completed, and the return moisture value with respect to the drying target moisture value is confirmed. Grain dryer.   4. The grain dryer according to claim 1, further comprising a moisture return correction operation means for automatically executing the moisture return correction control means after completion of the drying operation.   In the invention according to any one of claims 1 to 3, when the return moisture value is measured when the moisture return correction control means is executed, when there is a return higher than a set moisture value than the dry target moisture value, A grain dryer characterized in that a hot air drying operation in which a burner is burned is started instead of a circulation drying operation.

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