JPH04359624A - Motor overload preventive device for circulating grain drier - Google Patents

Motor overload preventive device for circulating grain drier

Info

Publication number
JPH04359624A
JPH04359624A JP16225691A JP16225691A JPH04359624A JP H04359624 A JPH04359624 A JP H04359624A JP 16225691 A JP16225691 A JP 16225691A JP 16225691 A JP16225691 A JP 16225691A JP H04359624 A JPH04359624 A JP H04359624A
Authority
JP
Japan
Prior art keywords
motor
grain
value
current value
cpu
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP16225691A
Other languages
Japanese (ja)
Other versions
JP3206757B2 (en
Inventor
Toshihiko Satake
佐竹利彦
Yoshinobu Yoda
與田善信
Koji Okumura
奥村浩次
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Satake Engineering Co Ltd
Original Assignee
Satake Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Satake Engineering Co Ltd filed Critical Satake Engineering Co Ltd
Priority to JP16225691A priority Critical patent/JP3206757B2/en
Publication of JPH04359624A publication Critical patent/JPH04359624A/en
Application granted granted Critical
Publication of JP3206757B2 publication Critical patent/JP3206757B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Drying Of Solid Materials (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Protection Of Generators And Motors (AREA)

Abstract

PURPOSE:To prevent a motor from stopping immediately and to work form being interrupted even if the current value is judged temporarily to be above a set value by judging the current value of a motor by classes being set optionally, and stopping the operation of the motor when the integrated value reaches the set value. CONSTITUTION:A current transformer 35 detects the current value of a motor 33, and the detection signal is input into a CPU 39 through an amplifier 36, an A/D converter 37, and an input circuit 38 the CPU 39 does sums and comparative operation, and when the integrated value reaches the set value, the CPU 39 outputs a signal. The output signal is sent to an electromagnetic switch 41 through an output 40 so as to stop the operation of the motor 33. What is more, the CPU 39 is set to open the electromagnetic switch 41 when it becomes that (set value)-(set value X time (second))=0. Hereby, even if the detected current value is judged temporarily to be above the set value, it never stops the operation of the motor interrupts the drying work, so the efficient drying of grains becomes possible.

Description

【発明の詳細な説明】[Detailed description of the invention]

【0001】0001

【産業上の利用分野】この発明は、モータの過負荷によ
る焼損を防止する循環式穀物乾燥機のモータ過負荷防止
装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor overload prevention device for a circulating grain dryer that prevents burnout due to overload of the motor.

【0002】0002

【従来の技術】循環式穀物乾燥機は、貯留部と乾燥部と
集穀部とからなり、集穀部は揚穀機を介して貯留部に連
絡して循環穀物行程を形成し、搬送機用モータ、揚穀機
用モータ、排出バルブ用モータ、排風機用モータ等によ
り駆動される。そして、貯留部に投入された穀物は乾燥
部において乾燥された後、乾燥部の下方に設けた排出バ
ルブにより間歇的に集穀部に供給され、集穀部から揚穀
機により投入されて、所定含水率になるまで循環される
[Prior Art] A circulating grain dryer consists of a storage section, a drying section, and a grain collection section.The grain collection section is connected to the storage section via a grain lifting machine to form a circulating grain process. It is driven by a grain-lifting machine motor, a discharge valve motor, an exhaust fan motor, etc. After the grains put into the storage part are dried in the drying part, they are intermittently supplied to the grain collection part by a discharge valve provided below the drying part, and are fed from the grain collection part by a grain lifting machine. It is circulated until a predetermined moisture content is reached.

【0003】0003

【発明が解決しようとする課題】上記のような従来の循
環式穀物乾燥機において、搬送機や揚穀機や排出バルブ
や排風機を駆動する各モータの電流値は変流器(CT)
で検出され、その検出信号は制御装置に入力される。制
御装置において、検出電流値が設定電流値以上であると
判定されると、制御装置から出力信号により各モータの
電源に介在した電磁開閉器が開成され、各モータの作動
が停止されて過負荷による焼損が防止される。
[Problems to be Solved by the Invention] In the conventional circulation type grain dryer as described above, the current value of each motor that drives the conveyor, grain lifting machine, discharge valve, and exhaust fan is controlled by a current transformer (CT).
The detection signal is input to the control device. When the control device determines that the detected current value is greater than or equal to the set current value, an output signal from the control device opens the electromagnetic switch interposed in the power supply of each motor, stopping the operation of each motor and preventing overload. This prevents burnout due to

【0004】しかし、モータの検出電流値が設定電流値
以上と判定されると、即時にモータの作動を停止して乾
燥作業が中止されてしまうが、穀物の一時的な詰まりに
より瞬時に設定電流値を越えてしまうことが度々ある。 一時的な穀物の詰まりであれば、詰まりが解消すれば通
常の乾燥作業を継続することができるりが、上記のよう
な従来の循環式乾燥機においては、この場合でも乾燥作
業を中止するため効率が低下するという欠点があった。
However, when it is determined that the detected current value of the motor is higher than the set current value, the motor operation is immediately stopped and the drying operation is stopped. The value is often exceeded. If the grain is temporarily clogged, normal drying operations can be continued once the clog is cleared, but in conventional circulation dryers like the one mentioned above, drying operations are stopped even in this case. The drawback was that efficiency decreased.

【0005】本発明は、上記のような従来装置の欠点を
解消して、電流検出器による検出電流値が一時的に設定
電流値以上と判定されても、直ちにモータの作動を停止
して乾燥作業を中断することのない循環式穀物乾燥機の
モータ過負荷防止装置を提供することを目的とする。
The present invention solves the drawbacks of the conventional device as described above, and even if the current value detected by the current detector is temporarily determined to be higher than the set current value, the operation of the motor is immediately stopped and the drying process is started. It is an object of the present invention to provide a motor overload prevention device for a circulating grain dryer that does not interrupt work.

【0006】[0006]

【課題を解決するための手段】貯留部と乾燥部と集穀部
と揚穀機とで循環穀物行程に形成した循環式穀物乾燥機
において、該乾燥機の各部を駆動する各モータの電源に
介在した電流検出器と、該電流検出器により任意時間ご
とに検出した電流値を任意に設定したクラスに判別し、
該判別したクラスごとに設定した係数の累積値が、任意
に設定した設定値に達したときに前記各モータの作動を
停止する制御装置とからなる循環式穀物乾燥機のモータ
過負荷防止装置である。
[Means for Solving the Problems] In a circulating grain dryer in which a storage section, a drying section, a grain collection section, and a grain lifting machine are formed into a circulating grain process, the power source of each motor that drives each section of the dryer is The intervening current detector and the current value detected by the current detector at arbitrary time intervals are classified into arbitrarily set classes,
A motor overload prevention device for a circulating grain dryer comprising a control device that stops the operation of each motor when the cumulative value of coefficients set for each of the determined classes reaches an arbitrarily set value. be.

【0007】[0007]

【作  用】モータの電源に介在した電流検出器からの
検出信号は制御装置に入力され、制御装置において、検
出した電流値は任意に設定したクラスに判別される。そ
して、判別された係数の累積値が設定値に達すると、モ
ータの作動が停止される。
[Operation] A detection signal from a current detector connected to the motor's power source is input to the control device, and the control device discriminates the detected current value into an arbitrarily set class. Then, when the cumulative value of the determined coefficients reaches the set value, the operation of the motor is stopped.

【0008】[0008]

【実施例】本発明の実施例を図面を参照しながら説明す
る。図1はモータ過負荷防止装置の回路図、図2は循環
式穀物乾燥機の駆動部を示す拡大図、図3は循環式穀物
乾燥機の部分正断面図である。
Embodiments An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a circuit diagram of a motor overload prevention device, FIG. 2 is an enlarged view showing a drive section of a circulating grain dryer, and FIG. 3 is a partial front cross-sectional view of the circulating grain dryer.

【0009】1は循環式穀物乾燥機であり、上部に調質
室2を、下部に通風乾燥部3をそれぞれ設け、その一側
に揚穀機4を立設して循環穀物乾燥行程を形成する。通
風乾燥部3に、多孔壁板で形成する乾燥室5と熱風室6
と排出室7とを並設し、各乾燥室5の上部を調質室2に
連通する。乾燥室5の下部を穀物流下路8に連絡し、そ
の排出口に排出バルブ9を設ける。10は集穀樋であり
、その底部に下部搬送機11を設け、下部搬送機11は
揚穀機4、上部搬送機12、飛散板13を介して調質室
2に連絡している。
Reference numeral 1 denotes a circulating grain dryer, in which a conditioning chamber 2 is provided in the upper part, a ventilation drying section 3 is provided in the lower part, and a grain lifting machine 4 is erected on one side to form a circulating grain drying process. do. The ventilation drying section 3 includes a drying chamber 5 and a hot air chamber 6 formed of a porous wall plate.
and a discharge chamber 7 are arranged in parallel, and the upper part of each drying chamber 5 is communicated with the tempering chamber 2. The lower part of the drying chamber 5 is connected to a grain flow path 8, and a discharge valve 9 is provided at the discharge port. Reference numeral 10 denotes a grain collection gutter, and a lower conveyor 11 is provided at the bottom of the gutter, and the lower conveyor 11 is connected to the tempering chamber 2 via a grain lifting machine 4, an upper conveyor 12, and a scattering plate 13.

【0010】揚穀機4のコンベアケース14内に、多数
のバケ15を取付けたベルト16を上下のプーリ17間
に捲回して設け、揚穀機4の上端の開口18は流下樋1
9を介して上部搬送機12に連絡し、20は揚穀機駆動
用モータである。
A belt 16 with a large number of buckets 15 attached thereto is wound between upper and lower pulleys 17 in the conveyor case 14 of the grain lifting machine 4, and an opening 18 at the upper end of the grain lifting machine 4 is connected to a drain trough 1.
It is connected to the upper conveyor 12 via 9, and 20 is a motor for driving the grain lifting machine.

【0011】揚穀機4のベルト16,16間に、バケッ
ト15からの戻り穀物を捕集する案内板21を傾斜させ
て設け、案内板21は供給筒22を介して水分測定装置
23に連絡し、水分測定装置23は排出樋24、戻り樋
25を介してコンベアケース14の下部開口(図示せず
)に連絡する。
A guide plate 21 is installed at an angle between the belts 16 and 16 of the grain lifting machine 4 to collect the returned grain from the bucket 15, and the guide plate 21 is connected to a moisture measuring device 23 via a supply cylinder 22. The moisture measuring device 23 is connected to a lower opening (not shown) of the conveyor case 14 via a discharge gutter 24 and a return gutter 25.

【0012】26は排出バルブ駆動装置(図2参照)で
あり、排出バルブ9,9の軸に取り付けたスプロケット
27,27と排出バルブ駆動用モータ28に取り付けた
スプロケット29とテンション用スプロケット30とに
チェーン31を捲回する。また、下部搬送機11の軸に
取付けたプーリ32と下部搬送機駆動用モータ33とを
ベルト34により連結する。
Reference numeral 26 denotes a discharge valve drive device (see FIG. 2), which includes sprockets 27, 27 attached to the shafts of the discharge valves 9, 9, a sprocket 29 attached to the discharge valve drive motor 28, and a tension sprocket 30. Wind the chain 31. Further, a pulley 32 attached to the shaft of the lower conveyor 11 and a lower conveyor driving motor 33 are connected by a belt 34.

【0013】次に、モータ過負荷防止装置の回路を図1
を参照して説明する。モータ33(モータ20、モータ
26においても同様である。)の電源にモータ33の電
流値を検出する変流器(CT)35を介在し、変流器3
5は増幅器36、AD変換器37、入力回路38を介し
て各種入力値を演算するCPU39に連絡する。CPU
39は出力回路40、電磁開閉器41を介してモータ3
3に連絡する。
Next, the circuit of the motor overload prevention device is shown in FIG.
Explain with reference to. A current transformer (CT) 35 that detects the current value of the motor 33 is interposed in the power supply of the motor 33 (the same applies to the motor 20 and the motor 26).
5 communicates via an amplifier 36, an AD converter 37, and an input circuit 38 to a CPU 39 that calculates various input values. CPU
39 is connected to the motor 3 via an output circuit 40 and an electromagnetic switch 41.
Contact 3.

【0014】次に上記構成における作用を説明する。ホ
ッパ(図示せず)に供給された穀物(例えば籾)は、揚
穀機4により揚送されて上部搬送機12を経て、飛散盤
13から調質室2内に均分に飛散して堆積される。次に
火熱発生装置(図示せず)及び排風機(図示せず)を作
動させ排出バルブ9を回転させると、調質室2内の穀物
は乾燥室5内を流下する。乾燥室5内を流下する穀物は
、熱風室6から排風室7へ横方向に流れる乾燥風により
高温乾燥され、乾燥風は排風室7から図外の排風機によ
り機外へ排出される。乾燥風により熱風乾燥された穀物
は穀物流下路8を流下し、排出バルブ9により間歇的に
排出される。排出された穀物は、集穀樋10を流下して
下部搬送機11により揚穀機12に送られて再び調質室
2に投入され、水分測定装置21が所定水分を検出する
まで循環乾燥される。
Next, the operation of the above configuration will be explained. Grain (for example, paddy) supplied to a hopper (not shown) is lifted by a grain lifting machine 4, passes through an upper conveyor 12, and is evenly scattered and deposited in a tempering chamber 2 from a scattering plate 13. be done. Next, when the heat generating device (not shown) and the exhaust fan (not shown) are activated and the discharge valve 9 is rotated, the grains in the tempering chamber 2 flow down into the drying chamber 5. Grain flowing down inside the drying chamber 5 is dried at high temperature by drying air flowing laterally from the hot air chamber 6 to the exhaust chamber 7, and the drying air is discharged from the exhaust chamber 7 to the outside of the machine by an exhaust fan (not shown). . The grains that have been hot-air-dried by the drying air flow down a grain flow path 8 and are intermittently discharged by a discharge valve 9. The discharged grain flows down the grain collection gutter 10, is sent to the grain frying machine 12 by the lower conveyor 11, and is again input into the tempering chamber 2, where it is circulated and dried until the moisture measuring device 21 detects a predetermined moisture content. Ru.

【0015】揚穀機4により揚送される穀物は、搬送時
の振動および流下樋19への放出により、バケット15
から両ベルト16,16間にこぼれ落ちる。こぼれ落ち
た穀物は案内板21に捕集され、案内板21から供給筒
22を流下して水分測定装置23に供給されて、穀物の
水分が測定される。水分測定済みの穀物は、水分測定装
置23から排出されて排出樋24を流下し、戻り樋25
からコンベアケース14の下部に供給される。
The grain lifted by the grain lifting machine 4 is transported into the bucket 15 due to vibrations during transportation and discharge into the downflow gutter 19.
It spills between the belts 16 and 16. The spilled grains are collected by the guide plate 21, flow down the supply cylinder 22 from the guide plate 21, and are supplied to the moisture measuring device 23, where the moisture content of the grains is measured. The grain whose moisture content has been measured is discharged from the moisture measuring device 23, flows down the discharge gutter 24, and returns to the return gutter 25.
and is supplied to the lower part of the conveyor case 14.

【0016】次に、モータ過負荷防止装置の作用を述べ
る(図1参照)。モータ33の電流値は変流器35によ
り検出され、検出信号は増幅器36で増幅された後AD
変換器37でAD変換される。AD変換された変換値は
入力回路38を介してCPU39に入力され、CPU3
9において算術及び比較演算される。その演算により検
出電流値の積算値が設定値に達するとCPU39から信
号が出力され、その出力信号は出力回路40を介して電
磁開閉器41へ送られ、それにより電子開閉器41が開
成されてモータ33の作動が停止される。
Next, the operation of the motor overload prevention device will be described (see FIG. 1). The current value of the motor 33 is detected by a current transformer 35, and the detection signal is amplified by an amplifier 36 and then
A converter 37 performs AD conversion. The AD-converted conversion value is input to the CPU 39 via the input circuit 38, and the CPU 3
Arithmetic and comparison operations are performed in 9. When the integrated value of the detected current value reaches the set value by the calculation, a signal is output from the CPU 39, and the output signal is sent to the electromagnetic switch 41 via the output circuit 40, thereby opening the electronic switch 41. Operation of motor 33 is stopped.

【0017】次に、CPU39における制御について説
明する。CPU39の記憶装置に、設定値−係数値×時
間(秒)=0となったとき、電磁開閉器41を開成して
モータ33の作動を停止するように設定する。設定値及
び係数値は任意に設定できるが、本実施例においては、
設定値を 200とし係数値を表1のとおりとする。
Next, control in the CPU 39 will be explained. The storage device of the CPU 39 is set so that when the set value - coefficient value x time (seconds) = 0, the electromagnetic switch 41 is opened and the operation of the motor 33 is stopped. Although the set value and coefficient value can be set arbitrarily, in this example,
The set value is 200, and the coefficient values are as shown in Table 1.

【0018】[0018]

【表1】 例えば、検出電流が 120%で累計時間が20秒、 
140%で累計時間が20秒、 160%で累計時間が
 8秒とすると、200− 1×20− 5×20−1
0× 8= 0となる。 つまり、異常電流値を検出してから48秒後にモータ3
3の作動が停止される。
[Table 1] For example, if the detection current is 120% and the cumulative time is 20 seconds,
If the cumulative time is 20 seconds at 140% and 8 seconds at 160%, then 200- 1 x 20- 5 x 20-1
0×8=0. In other words, 48 seconds after detecting the abnormal current value, the motor 3
3 is stopped.

【0019】また、異常電流値を検出しても設定値に達
しないうちに定格電流値に復帰した場合、このままの状
態では、次の異常電流値を検出したときに短時間でモー
タ33が停止してしまう。つまり、設定値を 200と
して、検出電流が定格電流の 200%である状態が 
4秒継続して正常電流に復帰したとすると、現在値は4
0( 200−40× 4=40)となり、 120%
でも40秒(40− 1×40= 0)でモータ33の
作動が停止してしまう。
Furthermore, even if an abnormal current value is detected, if the current value returns to the rated current value before reaching the set value, if the current value remains unchanged, the motor 33 will stop in a short time when the next abnormal current value is detected. Resulting in. In other words, if the set value is 200, the state where the detected current is 200% of the rated current is
If the current returns to normal after 4 seconds, the current value is 4.
0 (200-40×4=40), 120%
However, the operation of the motor 33 stops after 40 seconds (40-1×40=0).

【0020】そこで、現在値に任意の数、例えば 1秒
ごとに2を加算して設定値に復帰するように、CPU3
9の記憶装置に設定する。すると上記実施例においては
、80秒後(40+ 2×80= 200)に設定値(
 200)に復帰して、正常の検出状態となる。
[0020] Therefore, the CPU 3 is configured to add an arbitrary number to the current value, for example, 2 every second to return to the set value.
9 storage device. Then, in the above example, the set value (
200) and enters a normal detection state.

【0021】[0021]

【発明の効果】本発明における循環式穀物乾燥機のモー
タ焼損防止装置によれば、電流検出器による検出電流値
が一時的に設定電流値以上に判定されても、直ちにモー
タの作動を停止して乾燥作業を中断することがないため
、効率的な穀物の乾燥が可能となる。
[Effects of the Invention] According to the motor burnout prevention device for a circulating grain dryer according to the present invention, even if the current value detected by the current detector is temporarily determined to be higher than the set current value, the operation of the motor is immediately stopped. Since there is no need to interrupt the drying process, it is possible to dry grains efficiently.

【図面の簡単な説明】[Brief explanation of drawings]

【図1】モータ過負荷防止装置の回路図である。FIG. 1 is a circuit diagram of a motor overload prevention device.

【図2】循環式穀物乾燥機の駆動部を示す拡大図である
FIG. 2 is an enlarged view showing the drive section of the circulating grain dryer.

【図3】循環式穀物乾燥機の部分正断面図である。FIG. 3 is a partial front cross-sectional view of the circulating grain dryer.

【符号の説明】[Explanation of symbols]

1  循環式穀物乾燥機 2  調質室 3  通風乾燥部 4  揚穀機 5  乾燥室 6  熱風室 7  排風室 8  穀物流下路 9  排出バルブ 10  集穀樋 11  下部搬送機 12  上部搬送機 13  飛散盤 14  コンベアケース 15  バケット 16  ベルト 17  プーリ 18  開口 19  流下樋 20  揚穀機駆動用モータ 21  案内板 22  供給筒 23  水分測定装置 24  排出樋 25  戻り樋 26  排出バルブ駆動装置 27  スプロケット 28  排出バルブ駆動用モータ 29  スプロケット 30  テンション用スプロケット 31  チェーン 32  プーリ 33  下部搬送機駆動用モータ 34  ベルト 35  変流器 36  増幅器 37  AD変換器 38  入力回路 39  CPU 40  出力回路 41  電磁開閉器 1 Circulating grain dryer 2 Tempering chamber 3 Ventilation drying section 4 Grain lifting machine 5 Drying room 6 Hot air room 7 Exhaust room 8 Grain flow path 9 Discharge valve 10 Grain collecting trough 11 Lower conveyor 12 Upper conveyor 13 Scatter disk 14 Conveyor case 15 Bucket 16 Belt 17 Pulley 18 Opening 19 Downstream gutter 20 Grain lifting machine drive motor 21 Information board 22 Supply cylinder 23 Moisture measuring device 24 Discharge gutter 25 Return gutter 26 Discharge valve drive device 27 Sprocket 28 Discharge valve drive motor 29 Sprocket 30 Tension sprocket 31 Chain 32 Pulley 33 Lower conveyor drive motor 34 Belt 35 Current transformer 36 Amplifier 37 AD converter 38 Input circuit 39 CPU 40 Output circuit 41 Electromagnetic switch

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】貯留部と乾燥部と集穀部と揚穀機とで循環
穀物行程に形成した循環式穀物乾燥機において、該乾燥
機の各部を駆動する各モータの電源に介在した電流検出
器と、該電流検出器により任意時間ごとに検出した電流
値を任意に設定したクラスに判別し、該判別したクラス
ごとに設定した係数の累積値が、任意に設定した設定値
に達したときに前記各モータの作動を停止する制御装置
とからなることを特徴とする循環式穀物乾燥機のモータ
過負荷防止装置。
Claim 1: In a circulating grain dryer in which a storage section, a drying section, a grain collection section, and a grain lifting machine are formed in a circulating grain process, current detection is provided in the power supply of each motor that drives each part of the dryer. When the current value detected by the current detector and the current detector at any given time is classified into an arbitrarily set class, and the cumulative value of the coefficient set for each class has reached the arbitrarily set value. and a control device for stopping the operation of each of the motors.
JP16225691A 1991-06-05 1991-06-05 Motor overload prevention device in circulation type grain dryer Expired - Lifetime JP3206757B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16225691A JP3206757B2 (en) 1991-06-05 1991-06-05 Motor overload prevention device in circulation type grain dryer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16225691A JP3206757B2 (en) 1991-06-05 1991-06-05 Motor overload prevention device in circulation type grain dryer

Publications (2)

Publication Number Publication Date
JPH04359624A true JPH04359624A (en) 1992-12-11
JP3206757B2 JP3206757B2 (en) 2001-09-10

Family

ID=15750980

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16225691A Expired - Lifetime JP3206757B2 (en) 1991-06-05 1991-06-05 Motor overload prevention device in circulation type grain dryer

Country Status (1)

Country Link
JP (1) JP3206757B2 (en)

Also Published As

Publication number Publication date
JP3206757B2 (en) 2001-09-10

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