JP3744449B2 - Kernel retention detector for circulating grain dryer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a grain retention detection device for a circulation type grain dryer, and in particular, when a grain to be dried has accumulated in a high-temperature drying chamber or a collection chamber, the retention is immediately detected without causing a time delay. By this, it is related with the grain residence detection apparatus of the circulation type grain dryer which can prevent the overheating of a grain collection room, and the quality_change of a grain.
[0002]
[Prior art]
Conventionally known circulation type grain dryers are configured by, for example, a storage tank, a drying room, a grain collection room, a grain circulation means, and the like, by circulating the heated grain again and repeating the heating. Let The storage tank stores and conditioned the received grains, and the drying chamber collects the cereal plates in the threshing chamber by a quantitative operation device such as a rotary valve while heating and drying with hot air while flowing down. The cereal collection room is provided with a spiral conveyance unit, and the collected cereal grains are raised to the storage tank and circulated again by the cereal circulation means including an elevator and the like. Moreover, there is an example in which a far-infrared radiation part is provided in the cereal collection room and the heated grain is further heated and dried by far-infrared rays.
[0003]
In the above-mentioned circulation type grain dryer, if the grain circulation means malfunctions and the grains stay in the collection room, the chain and sprocket are damaged due to overloading of the quantitative operation device, and this detection is slow. And irradiation from the far-infrared radiation part may cause overheating of the accumulated grains, overheating of the cereal collection room, and the like.
[0004]
In order to avoid such a situation, in the above-mentioned circulation type grain dryer, for example, the grain retention detection by the grain detection means provided in the vicinity of the upper outlet of the elevator or the entrance of the relatively low temperature storage tank Monitor the stagnation of grains with a device.
The grain detection means detects when the inflow of the grain at the inlet of the storage tank is interrupted due to an abnormality such as a spiral conveyance unit that carries the grain from the elevator, and outputs a stay detection signal. By stopping the heating and drying operation of the circulation type grain dryer via this signal, it is possible to prevent an unexpected situation due to grain retention.
[0005]
[Problems to be solved by the invention]
However, since the above-mentioned grain retention detection device monitors the presence or absence of grains at the entrance of the storage tank, the grains remain even if partial retention of grains occurs in the grain collection room or the like. If a part of is circulated by the grain circulation means, a grain detection signal is output. Therefore, the output of the grain detection means may be too late without corresponding to the staying condition of the grains in the cereal collection room or the like. Further, due to partial stagnation in the drying chamber, the stagnation part may be excessively heated.
[0006]
The purpose of the present invention is to immediately detect the retention of grains without causing a time delay when the grains to be dried stay in a high-temperature drying room or grain collection room. It is an object of the present invention to provide a grain retention detection device for a circulation type grain dryer capable of preventing the above-described problem.
[0007]
[Means for Solving the Problems]
  In order to solve the above problems, the invention according to claim 1 is heated by a heating and drying means.The collected grain is collected at the lower end by a grain collecting plate while being quantitatively dropped from the quantitative operation means,By means of kernel circulationReA grain retention detection device for a circulation type grain dryer for detecting an abnormal flow of a grain in a circulation type grain dryer to be circulated, comprising:Cereal boardTemperature detection means for detecting temperature, and temperature detected by this temperature detection meansCompare the temperature of the cereal collection board with normalAnd a comparison means.
[0008]
  The temperature detecting means isThe temperature of the cereal board is detected, and the detected temperature and the temperature of the cereal board at normal timeThe comparison means judges and outputs the temperature difference. If residence occurs in the drying chamber, the amount of operation from the quantitative operation device decreases, and the amount of radiation received by the far-infrared radiator on the cereal board increases, so the detection temperature rises from the normal temperature. , GrainThe presence or absence of grain retention can be grasped.
[0009]
The invention according to claim 2 is a circulation type grain dryer in which the grain heated by the heating and drying means is collected at the lower end by the grain collecting plate while being quantitatively dropped from the quantitative operation means and is recirculated by the grain circulation means. A cereal retention detector for a circulation type grain dryer for detecting an abnormality in the flow of cereal grains, a transparent part formed in the flow-down range of the grains received by the cereal collection board, and a grain in the transparent part The optical detection means for optically detecting the frequency of occurrence from the back side, the detection frequency of grains by this optical detection means and the normal detection frequency by the quantitative feeding by the quantitative operation means And a comparison means for determining and outputting the presence / absence of a difference from the above.
[0010]
The grain retention detector of the circulation type grain dryer detects the frequency of the grains appearing in the transparent part of the grain collecting board by the optical detection means, and compares the frequency according to the frequency difference between the detection frequency and the normal frequency. Since the means outputs the determination, if there is an abnormality in the flow of the grain on the cereal collection board, that is, an abnormality in feeding from the quantitative operation means and a circulation abnormality by the grain circulation means, it can be grasped by the determination output.
[0011]
  In the invention according to claim 3, the grain heated by the heating and drying means is collected by the grain collecting plate while dropping from the quantitative operation means, and this is collected by the grain circulation means.ReA grain retention detection device for a circulation type grain dryer that detects abnormalities in the flow of grains in the circulation type grain dryer to be circulated,A suction fan that sucks hot air from the cereal collection room, a temperature detection means that detects the temperature of the suction air sucked by the suction fan, and a comparison determination between the temperature detected by the temperature detection means and the temperature of the suction air during normal operation DoAnd a comparison means.
[0012]
  the aboveThe temperature detecting means detects the temperature of the suction air sucked by the suction fan, and detects the detected temperature and the temperature of the suction air at normal time.The comparison means outputs the temperature difference ofCerealThe presence or absence of grain retention can be grasped.
[0013]
【The invention's effect】
  The grain retention detection device of the circulation type grain dryer of the present invention has the following effects.
  The grain retention detection device of the circulation type grain dryer having the above-described configuration includes a predetermined temperature detection means and a comparison means corresponding to the heating process, thereby determining according to the temperature difference between the detected temperature and the normal temperature. Since an output is obtained, the presence or absence of grain retention in the heating process can be grasped from this determination output.
  Therefore, by using the above-mentioned grain retention detector of the circulation type grain dryer, it is possible to minimize the abnormal overheating of the grains in the circulation type grain dryer by making an initial response in response to the occurrence of grain retention in the heating process. It becomes possible to suppress.
  Further, since the temperature detection means for detecting the temperature of the cereal board and the comparison means for comparing and determining the temperature detected by the temperature detection means and the temperature of the cereal board at the normal time, retention occurs on the lower spiral side. This can be determined by the detection temperature falling from the normal temperature, and the retention in the drying chamber can be determined by the detection temperature rising from the normal temperature.
[0014]
In addition, when the grain retention detection device of the circulation type grain dryer is constituted by the optical detection means for detecting the grain appearing in the transparent portion formed on the grain collection board and the predetermined comparison means, the grain collection board Since the judgment output corresponding to the frequency difference from the normal frequency is obtained with respect to the frequency of the appearance of the grain in the transparent part of the grain, the judgment output of the grain on the grain collecting plate, that is, the quantitative operation means It is possible to grasp the abnormalities of feeding from the sewage and the circulation abnormality due to the grain circulation means.
Therefore, the grain retention detection device of the circulation type grain dryer is adapted to the initial response immediately in response to the occurrence of the grain retention due to the abnormal feeding from the quantitative operation means and the circulation abnormality by the grain circulation means. Abnormal overheating of grains and the like in the grain dryer can be minimized.
[0015]
  Also,A suction fan for sucking hot air from the cereal collection room;
  Temperature detecting means for detecting the temperature of the suction air sucked by the suction fan;
  The temperature detected by this temperature detection means is compared with the temperature of the suction air at normal time.When configuring the grain retention detection device of the circulation type grain dryer from the comparison means,Not only the failure of the quantitative operation device and its control system, but also the retention of a partial cross section of the passageCan grasp.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment relating to a grain retention detection device for a circulation type grain dryer of the present invention specifically configured based on the above technical idea will be described below with reference to the drawings.
[0017]
FIG. 1 is a perspective front view of the internal configuration of a circulation type grain dryer to which the grain retention detecting device according to the invention is applied, FIG. 2 is a longitudinal side view of the internal configuration of the circulation type grain dryer, and FIG. An enlarged perspective view of the sensor mounting portion of the stay detection device is shown in FIG.
1 to 3, a circulation type grain dryer 1 includes a storage tank 3 that stores and tempered grain, and a drying chamber that heats and drys the grain by circulating hot air at the lower end of the storage tank 3. 4. Consists of a cereal collection chamber 6 that receives and accumulates heated grains, and an elevator 7 that is a circulating means for returning the grains to the storage tank 3.
[0018]
Specifically, the storage tank 3 is provided with an upper spiral 8 for putting the grains received from the elevator 7. In the drying chamber 4, a perforated plate 11 that obliquely partitions the cereal collecting chamber 6 and introduces hot air for drying, and a suction unit that sucks the hot air from the cereal collecting chamber 6 facing the perforated plate 11. 13 and 13, and quantitative operation devices 14 and 14 for regulating the flow rate of the passage formed between the suction portions 13 and 13 and the perforated plate 11.
[0019]
The suction units 13 and 13 communicate with a suction fan 17 installed between the front plate 16a and the rear plate 16b and attached to the rear plate 16b, and detect the temperature of the suction air sucked by the suction fan 17. The temperature sensors 19 and 19 are disposed at the substantially central position of the suction portions 13 and 13 at the inlet of the suction fan 17. The temperature sensors 19 and 19 input a signal to an arithmetic processing unit (not shown) so as to constitute a grain retention detection device that determines the flow of the grain. A comparison unit for determining whether or not there is a temperature difference is provided. The normal temperature is the temperature of the suction air when there is no grain retention in the heating process in the drying chamber 4, and is set in advance in consideration of the above items by the set hot air temperature, the elapsed drying time, the amount of tension, and the like. Yes.
[0020]
The cereal collection chamber 6 is provided with a cereal collection board 21, 21 for receiving heated grains and guiding the inclination from the left and right side plates 22, 22, and a lower spiral 23 for carrying out the grains accumulated at the lower ends thereof. And is sent to the elevator 7. Moreover, the cereal collection room 6 includes a far-infrared radiator 24 that emits far-infrared rays while supplying hot air for heating and drying.
[0021]
By configuring as described above, the circulation type grain dryer 1 stores and temperates the cereal grains in the storage tank 3 at a predetermined flow rate by the quantitative operation devices 14 and 14 in the drying chamber 4. While sending out the grain, it is dried by passing hot air, gathered by the grain collecting plates 21, 21 while being further heated by the far-infrared radiator 24 in the grain collecting room 6, and sent again to the storage tank 3 by the elevator 7. These series of processes are repeated until the grain reaches the target moisture value.
[0022]
This series of operations will be described in detail. In the drying chamber 4, a predetermined hot air supplied from the far-infrared radiator 24 of the grain collection chamber 6 as a supply source is received by the perforated plate 11. Then, the air is sucked and discharged from the suction portions 13 and 13 by the suction fan 17. The temperature of the suction air is sent to the arithmetic processing unit of the grain retention detection device by the temperature sensors 19 and 19, and the presence or absence of a difference from the normal temperature is monitored for the suction air.
[0023]
The temperature of the suction air for heating and drying rises due to the retention of the grains in the drying passage 11a sandwiched between the perforated plate 11 and the suction portions 13 and 13, and therefore, the temperature sensor 19 serving as the temperature detecting means. , 19 can detect the retention of the grains in the drying chamber 4.
[0024]
The normal temperature to be compared for the determination of the temperature abnormality can be easily determined by determining the normal temperature rise limit temperature to be fixed, for example, 60 ° C., for example. 4 is applied when the hot air temperature T6 for heating and drying and the suction air temperature T13 change according to the outside air temperature T0, and the example is determined according to the outside air temperature T0. The normal temperature Ts determined in the normal case is used. For example, by defining the limit temperature increase width ΔT based on the expected temperature increase width of the suction air, the normal temperature Ts = the outside air temperature T0 + the limit temperature increase width ΔT can be determined with high accuracy by the normal temperature in consideration of the outside air temperature. Residence determination can be made. In addition, depending on the determination accuracy, not only the temperature difference but also the stagnation of the grain may be detected by the temperature change per unit time.
[0025]
Grain retention in the drying chamber 4 is caused not only by a failure of the quantitative operation devices 14 and 14 and its control system, but also by a clogging of a so-called “bridge” passage and its inlet. In particular, when a “bridge” occurs in part, even if the grain is circulated as a whole, a partial cross-section of the passage causes a partial deterioration in quality, and a partial temperature rise causes an ignition. Sometimes. Such a partial stagnation can also be detected through an increase in the temperature of the suction air. Measures to deal with anomalies include the issue of anomaly alarms and the shutdown of dryers.
[0026]
In contrast to such a grain retention detection device, the conventional one is designed to detect the retention of grain by using a hot air temperature sensor to detect a high temperature abnormality in the grain collection chamber 6 or by shorting a grain detection switch provided in the elevator 7. It is only detected after the fact, and especially the hot air temperature in the grain collection chamber 6 varies depending on the type of grain, amount of filling, setting of drying speed, etc., and may be used in a high temperature state. It was difficult to discriminate between high-temperature heating and normal heating state based on
However, since the retention of the grain in the drying chamber 4 can be detected by the above-described circulation-type grain dryer, the grain in the circulation-type grain dryer can be detected in response to the occurrence of the retention. It is possible to minimize the abnormal overheating of the.
[0027]
Next, a grain retention detection device that determines the flow of grain based on the temperature of the grain collecting board will be described. FIG. 5 shows a cross-sectional view of a main part of a front view according to a configuration example of the grain retention detection device based on the temperature of the grain collecting board. In the following description, the same members as those described above are denoted by the same reference numerals and the description thereof is omitted.
[0028]
In FIG. 5, a temperature sensor 33 such as a thermistor for detecting the temperature of the grain collecting plate 21 by attaching a stay 31 to the lower surface of the grain collecting plate 21 that receives the grain g fed downward from the quantitative operation device 14, is attached. A grain retention detection device is configured from an arithmetic processing unit (not shown) for comparing and determining the temperature detected by the temperature sensor 33 with the normal temperature.
[0029]
The temperature sensor 33 is arranged in at least one place at a position where the grain descends on the grain collecting plate 21, that is, a position where the grain descends from the position immediately below the quantitative operation device 14 to the vicinity of the upper end of the accumulation part by the lower spiral 23. To do. If the temperature sensor 33 is arranged away from the cereal collecting board 21, it can be detected without directly receiving the heat of the hot cereal collecting board 21. The normal temperature is the temperature of the grain collecting board 21 in a normal case where the fixed quantity of grain fed from the quantitative operation device 14 flows down, and the above-mentioned items are determined in advance according to the set hot air temperature, the elapsed drying time, the amount of tension, and the like. It is set in consideration of.
[0030]
By configuring as described above, the grain retention detection device based on the temperature of the grain collecting plate 21 monitors the temperature of the grain collecting plate 21 with the temperature sensor 33 for the flow-down state of the grain fed from the quantitative operation device 14. . When the retention occurs on the lower spiral 23 side, the grains accumulate on the grain collecting plate 21 beyond the upper end of the accumulation portion by the lower spiral 23, and the radiation from the far-infrared radiator 24 is blocked. As shown in the figure, the temperature change characteristic of the grain collecting board when the stay is generated on the lower spiral 23 side shown in FIG. Therefore, the retention of the grain on the lower spiral 23 side can be determined from the gradient of change from the initial stable temperature.
[0031]
In addition, when the stagnation occurs in the drying chamber 4, the amount of operation from the quantitative operation device 14 decreases and the amount of radiation received by the cereal collecting plate 21 from the far-infrared radiator 24 increases. Since the temperature is further increased, the retention of the grains on the drying chamber 4 side can be determined from the difference between the detected temperature and the normal temperature. In this case, by disposing a plurality of temperature sensors 23, it is possible to detect a stay due to a partial bridge corresponding to the grain streamline.
[0032]
Next, a grain retention detection device that detects the flow of grain by mechanical detection means will be described. FIG. 7 shows a front cross-sectional view of the detection unit of the grain retention detection device that detects the flow of the grain by mechanical detection means, and FIG. 8 shows a perspective view of the detection unit.
[0033]
7 and 8, the detection unit of the grain retention detection device has a sensing plate 41 on the lower surface side that is rotatable to the grain collection plate 21 at a position directly below the grain that is fed downward from the quantitative operation device 14. A limit switch 44 that is elastically supported by the spring 43 and detects the vertical movement thereof is attached to a stay 46 provided on the back side of the grain collecting plate 21. The sensing plate 41 is configured by supporting the upper side of the grain collecting plate 21 on the support shaft 47 along the inclination of the grain collecting plate 21 and dividing the width dimension of the grain collecting plate 21 into a plurality of parts.
[0034]
The detection signal of the limit switch 44 is input to an arithmetic processing unit (not shown), and the comparison unit detects the frequency of the fall detected through the vibration of the sensing plate 41 due to the fall of the grain and the normal operation by the quantitative operation device 14. The presence / absence of a frequency difference from the normal frequency, which is the detection frequency at the time of quantitative feeding, is determined and output.
[0035]
By configuring the grain retention detection device as described above, the frequency of dropping is detected by the limit switch 44, which is a mechanical detection means, for the grain falling from the quantitative operation device 14, and this detection frequency and normal time Since the comparison unit makes a determination output in accordance with the frequency difference from the frequency, if there is a grain feeding abnormality from the quantitative operation means 14, a partial grain in the drying chamber 4 is determined by the determination output for each sensing plate 41. The presence or absence of grain retention can be grasped.
[0036]
Therefore, the above-mentioned grain retention detector of the circulation type grain dryer minimizes abnormal overheating of the grains in the circulation type grain dryer by the initial response that immediately responds to the occurrence of grain retention in the heating process. It becomes possible to suppress to.
[0037]
Next, a grain retention detection device that detects the flow of grain by optical detection means will be described. FIG. 9 shows a front cross-sectional view of the detection unit of the grain retention detection device that detects the flow of the grain by optical detection means.
[0038]
In FIG. 9, the detection unit of the grain retention detection device forms a transparent window 51 made of glass or the like in the flow range of the grain collecting plate 21 that receives the grain fed downward from the quantitative operation device 14, and this transparent window 51. A photo sensor 53 for detecting the grain g appearing on the basis of the reflected light or the like is attached to a stay 54 provided on the back side. The photosensors 53 are arranged at a plurality of positions in the depth direction of the machine body.
[0039]
The detection signal of the photosensor 53 is input to an arithmetic processing unit (not shown), and the comparison unit detects the grain g that appears in the transparent window 51 and the normal quantitative feeding by the quantitative operation device 14. Whether or not there is a frequency difference from the normal frequency, which is the detection frequency, is determined and output. Specifically, as shown in the detection waveform diagram (a) by the photosensor of FIG. 10 and its frequency characteristic diagram (b), the detection waveform B at the time of flow corresponds to the width W of two peaks in the frequency characteristic diagram. The grain flow rate can be obtained.
[0040]
By configuring the grain retention detection device as described above, the frequency of appearance of the grain g is detected by the optical detection means for the grain fed from the quantitative operation means 14, and this detection frequency and normal time are detected. Since the comparison means makes a determination output according to the frequency difference from the frequency, if there is an abnormal feeding of the grain from the quantitative operation means 14 or a stay on the lower spiral 23 side, the grain is determined by the judgment output for each photosensor 53. The presence or absence of grain retention can be grasped.
[0041]
Therefore, the grain retention detection device of the circulation type grain dryer is configured by the optical detection means, and similarly to the above, the circulation type grain can be responded by the initial response that is immediately responded to the occurrence of the grain retention immediately after the heating process. Abnormal overheating of grains and the like in the dryer can be minimized.
[0042]
Next, the arrangement of the temperature sensor when directly measuring the grain temperature in the circulation type grain dryer will be described. FIG. 11 is a cross-sectional view taken along line AA of FIG. 1, and FIG. 12 is a perspective view of a main part showing a temperature sensor mounting structure.
[0043]
FIG. 11 shows the arrangement of the temperature sensor 64, and both ends of tension bars 63, 63 having a U-shaped cross-section laid between the left and right side plates 22, 22 to reinforce the inlet of the drying chamber 4 of the circulation type grain dryer. By attaching the temperature sensor 64 to four places, it constitutes as a grain temperature sensor for measuring the grain temperature. Then, the presence or absence of a temperature difference between the temperature measured by the temperature sensor 64 and the normal temperature is determined as described above, and grain retention is detected.
[0044]
Specifically, as shown in FIG. 12, a temperature sensor 64 is projected from a grommet 66 fitted into the left and right side plates 22 and 22 at a position close to the lower side of the tension bars 63 and 63. This temperature sensor 64 is in contact with the grain at the pocket position below the tension bars 63, 63 while avoiding the pressure when the grain moves downward from the lower end of the storage tank 3 to the drying chamber 4. It can be detected directly. By configuring the temperature sensor 64 as a grain temperature sensor in this way, the grain temperature can be directly detected, so that the detection accuracy can be improved. Also, abnormalities in the flow in the drying chamber 4 can be detected by measuring at a plurality of locations.
[0045]
Next, the display on the operation panel of the circulation type grain dryer will be described. FIG. 13 shows the panel configuration of the operation panel of the circulation type grain dryer.
In FIG. 13, an operation panel 71 of the circulation type grain dryer includes an operation push button switch unit 73 and a display unit 74 that displays an operation state or the like according to the operation, and the display unit 74 can perform color display. It consists of LCD, PDP, etc. The display unit 74 includes a display control unit (not shown) for the display, and performs display control so that the background color is switched according to the grain type to be handled. For example, in the case of straw, the background color is blue, the wheat is gray, and the barley is green. The grain type and the background color are associated with each other, and a character color with high visibility is set according to the background color. In this case, it may be configured such that the user can change the display color setting on the menu screen.
[0046]
In conventional circulation-type grain dryers, when the dryer is operated, characters are displayed to distinguish target grain types such as “籾” and “wheat” in order to clarify the difference in operating conditions depending on the grain type. However, it was difficult to cope with a wide range of conditions for the installation environment of the dryer and the operator due to the limit of visibility on the display panel surface of a limited size.
[0047]
However, the circulation type grain dryer of the present invention can improve the visibility of the operation panel without reducing the amount of display information by configuring the operation panel 71 as described above. Therefore, it is possible to check the dry cereal currently being processed even at a location away from the operation panel 71. In addition, since it is easy for elderly operators to check, it is possible to prevent an erroneous operation such as driving in the wheat range in spite of drying operation of the straw, and to give a sense of security.
[0048]
As another configuration example, the background color of the display unit 74 is changed according to the progress of drying. For example, the background color is changed so that the expected drying end time is blue for 10 hours or more, green for 5 to 10 hours, yellow for 1 to 5 hours, and orange for 1 hour or less. In this case, the background color may be changed according to the moisture value.
[0049]
With this configuration, it is possible to eliminate the troublesomeness of reading characters, moisture values, remaining time, bar graphs, and the like on the display unit 74 toward the conventional operation panel 71 in order to check the time until the end. . Therefore, when the dryer is placed at the back of the barn, the progress of the drying process can be confirmed at a glance even by an elderly operator at a position such as the barn entrance away from the operation panel 71. This makes it possible to improve workability by setting up.
[0050]
Next, another display method of the operation panel of the circulation type grain dryer will be described. FIG. 14 shows another panel configuration example of the operation panel of the circulation type grain dryer.
In FIG. 14, when the display unit 83 is displayed on the LCD or the like of the operation panel 81, the grain type to be used is selected and stored in advance, and a predetermined grain type, for example, straw and barley can be set during the grain type setting operation. Thus, the display control unit is configured to display only the “籾” display 83a and the “barley” display 83b. Further, as in the configuration example of the selection switch type operation panel 91 of FIG. 15, a guide indicator 93 such as an LED is arranged on the selection switch type operation panel 91 and is lit according to the selected stored contents. For selection storage, a selection storage menu is provided or setting means such as a DIP switch is used.
[0051]
Conventionally, even when only straw is dried, for example, when changing the drying setting from “crack / fast” to “crack / slow”, “wheat / normal to fast”, “barley”, “beer wheat”, etc. It was forced to be annoying operation that had to be set through.
However, by configuring the operation panels 81 and 91 as described above, the display unit 83 of the operation panel 81 has only the predetermined grain types stored, for example, the “籾” display 83a and the “barley” display 83b. Further, only the indicator 93 at a predetermined position for guidance is lit on the operation panel 91 of the selection switch type. Therefore, the operation can be easily performed without fail while being focused only on the setting target.
[Brief description of the drawings]
FIG. 1 is a perspective front view of an internal configuration of a circulation type grain dryer to which a grain retention detecting device according to the invention is applied.
FIG. 2 is a longitudinal side view of the internal configuration of the circulation type grain dryer of FIG.
3 is an enlarged perspective view of the sensor mounting portion of the grain retention detection device of FIG. 1;
[Fig. 4] Judgment example of grain retention by normal temperature considering outside air temperature
FIG. 5 is a cross-sectional configuration diagram of a main part of a front view according to a configuration example of a grain retention detection device based on the temperature of a grain collecting board.
FIG. 6 is a temperature change characteristic diagram of a cereal collecting board when staying occurs on the lower spiral side.
FIG. 7 is a front cross-sectional view of a detection unit of a grain retention detection device using mechanical detection means.
8 is a perspective view according to the detection unit of FIG.
FIG. 9 is a front cross-sectional view related to a detection unit of a grain retention detection device using optical detection means.
FIG. 10 is a waveform diagram (a) detected by a photosensor and its frequency characteristics (b).
11 is a cross-sectional view taken along line AA in FIG.
12 is a perspective view of a principal part showing a mounting structure of the temperature sensor of FIG.
[Fig. 13] Panel configuration of operation panel of circulation type grain dryer
FIG. 14 shows another panel configuration example of the operation panel of the circulation type grain dryer.
FIG. 15 shows a configuration example of a selection switch type operation panel.
[Explanation of symbols]
1 Circulating grain dryer
3 Storage tank
4 Drying room (heating drying means)
6 Grain collection room
7 Elevator
11 Perforated plate
13 Suction unit
14 Quantitative operation device (quantitative operation means)
17 Suction fan
19 Temperature sensor (temperature detection means)
21 Grain collection board
23 Lower spiral
24 Far-infrared radiator
33 Temperature sensor
41 Sensing plate
44 Limit switch (Mechanical detection means)
51 Transparent window
53 Photosensor
63 Tension bar
64 Temperature sensor
71 Operation panel
73 Button switch
74 Display
81 Operation panel
83 Display
83a, 83b display
91 Operation panel
93 Indicator
g grain
T0 outside air temperature
T13 Suction air temperature
T6 Hot air temperature
Ts Normal temperature

Claims (3)

The heated grains while quantitative dropping Quantitative Feeding unit by heat drying means collected at the lower end by AtsumariKoku plate, the abnormality of the grain flow of circulating grain dryer recirculate the grains circulation means A grain retention detection device for a circulating grain dryer to detect,
Temperature detecting means for detecting the temperature of the cereal collection board ;
A grain retention detection device for a circulation type grain dryer, comprising comparison means for comparing and judging the temperature detected by the temperature detection means and the temperature of the grain collecting board at normal time . The grains heated by the heating and drying means are collected at the lower end by the grain collecting plate while being quantitatively dropped from the quantitative operation means, and the abnormalities in the flow of the grains in the circulation type grain dryer are recycled by the grain circulation means. A grain retention detection device for a circulating grain dryer to detect,
A transparent portion formed within the flow range of the grains received by the cereal collection board,
Optical detection means for optically detecting the frequency of appearance of grains in the transparent part from the back side;
Comparing means for determining whether or not there is a difference between the detection frequency of the grain by the optical detection means and the normal frequency that is the normal detection frequency by the quantitative feeding by the quantitative operation means, Kernel retention detector for circulation type grain dryer. The grain that has been heated by the heating drying device collected by AtsumariKoku plate while falling Quantitative Feeding means, which detects the abnormality of the grain flow of circulating grain dryer recirculate the grains circulation means circulating A grain retention detection device for a type grain dryer,
A suction fan for sucking hot air from the cereal collection room;
Temperature detecting means for detecting the temperature of the suction air sucked by the suction fan;
A grain retention detection device for a circulation type grain dryer, comprising comparison means for comparing and determining the temperature detected by the temperature detection means and the temperature of the suction air during normal operation .

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