JP3391490B2 - Powder transfer device - Google Patents
Powder transfer deviceInfo
- Publication number
- JP3391490B2 JP3391490B2 JP35567292A JP35567292A JP3391490B2 JP 3391490 B2 JP3391490 B2 JP 3391490B2 JP 35567292 A JP35567292 A JP 35567292A JP 35567292 A JP35567292 A JP 35567292A JP 3391490 B2 JP3391490 B2 JP 3391490B2
- Authority
- JP
- Japan
- Prior art keywords
- powder
- vibration
- vibrator
- wall surface
- force
- 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.)
- Expired - Fee Related
Links
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、圧電素子などの機械
的振動又は粉体に帯電した正負のイオンを利用して搬送
路の壁面から粉体を離脱させて搬送する粉体搬送装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder conveying apparatus for separating powder from a wall surface of a conveying path and conveying it by utilizing mechanical vibration of a piezoelectric element or the like or positive and negative ions charged in the powder.
【0002】[0002]
【従来の技術】従来、圧電素子などの電気−機械変換素
子による機械的振動で粉体を搬送する装置として振動フ
ィーダや振動コンベアのようにモータなどを用いた加振
手段で数10Hz程の低周波の縦振動を水平樋に20〜
30°傾けて与え、樋に乗った粉体を連続的に跳ね上げ
て搬送する技術が知られている。これは搬送量の調節も
電気的に容易に行なえ、また所要エネルギも比較的小さ
いなど短距離用の輸送法として卓れている。2. Description of the Related Art Conventionally, as a device for conveying powder by mechanical vibration due to an electro-mechanical conversion element such as a piezoelectric element, a vibrating means using a motor or the like such as a vibrating feeder or a vibrating conveyor has a low frequency of about several tens Hz. Vertical vibration of frequency 20 to horizontal gutter
A technique is known in which the powder is slanted at 30 ° and the powder on the gutter is continuously bounced and conveyed. This is an excellent transportation method for short distances because the amount of transportation can be easily adjusted electrically and the required energy is relatively small.
【0003】また、電気集塵器のように、直流高電圧を
印加した放電極から空気中にコロナ放電を行ない、発生
したイオンを粉塵粒子に付着させて集塵極に吸引する技
術が知られている。Further, there is known a technique in which a corona discharge is carried out in the air from a discharge electrode to which a high DC voltage is applied, and the generated ions are attached to dust particles to be attracted to a dust collecting electrode like an electrostatic precipitator. ing.
【0004】[0004]
【発明が解決しようとする課題】しかし、上記の振動フ
ィーダや振動コンベアでは振動周波数が低いため、搬送
される粉体のうち搬送路の壁面に吸着状態となっている
粉体が振動の変位速度に追随して壁面から離脱できずに
残り、粒径や種類の異なる別の粉体を続けて同一の振動
フィーダや振動コンベアで搬送しようとすると、毎回清
掃をしなければならないという問題がある。However, since the vibration frequency is low in the above-mentioned vibration feeder and vibration conveyor, the powder that is adsorbed on the wall surface of the conveying path among the conveyed powders has a displacement speed of vibration. However, if another powder having a different particle size or type remains to be conveyed by the same vibrating feeder or vibrating conveyor, the cleaning must be carried out every time.
【0005】この発明は、このような課題の解決に着目
したものであり、搬送路の内壁面に粉体が付着して残ら
ないようにした粉体搬送器を提供することを課題とす
る。The present invention focuses on the solution of such a problem, and an object thereof is to provide a powder carrier in which the powder does not adhere and remain on the inner wall surface of the carrier path.
【0006】[0006]
【0007】[0007]
【0008】[0008]
【課題を解決するための手段】この発明は、上記課題を
解決する第1の手段として、粉体を所定方向に搬送する
粉体搬送路の壁面外面に振動子からの振動が伝達される
ように振動子を連結し、振動子に高周波電圧を印加する
駆動電気回路を接続し、かつ上記壁面に絶縁層を挟んで
互いに極性が異なる2種類の面電極を縞状に交互に独立
して配設し、この面電極に一定時間間隔で極性が変化す
る電圧を印加する電圧源電気回路を接続し、上記高周波
電圧の印加による振動子の振動に基づき搬送路の壁面に
合成振動の節が不規則に移動する高周波振動を生じさせ
るとともに、上記面電極に流れる放電電流で搬送路壁面
に沿って生成される正負のイオンを搬送路内の又はその
壁面に付着した粉体に帯電させ、面電極の極性との相違
により生ずるクーロン力で粉体の吸着作用が静電的に弱
められている間に振動子による振動力を加えるようにし
て、振動力とクーロン力の相互作用により粉体を離脱さ
せて搬送するようにして成る粉体搬送装置の構成とした
のである。As a first means for solving the above problems, the present invention is designed so that vibration from a vibrator is transmitted to the outer surface of the wall surface of a powder conveying path for conveying powder in a predetermined direction. Connect the vibrator to the vibrator, connect the drive electric circuit that applies high frequency voltage to the vibrator, and sandwich the insulating layer on the wall surface.
Two types of surface electrodes, which have different polarities, are alternately striped and independent
And by arranging and connecting a voltage source an electric circuit for applying a voltage whose polarity changes at a predetermined time interval to the plane electrode, the composite vibration on the wall of the conveying path based on the vibration of the vibrator by the application of the high frequency voltage In addition to causing high-frequency vibration in which the nodes move irregularly, positive and negative ions generated along the wall surface of the transport path by the discharge current flowing in the surface electrode are charged to the powder in the transport path or attached to the wall surface. , Coulomb force generated due to the difference in polarity of the surface electrode electrostatically weakens the adsorption action of the powder.
While applying the
Then, the powder conveying device is configured to separate and convey the powder by the interaction of the vibration force and the Coulomb force .
Of .
【0009】又、上記課題を解決する第2の手段とし
て、粉体を所定方向に搬送する粉体搬送路の壁面内面に
絶縁層を挟んで多数の面電極を有する平板状圧電体の振
動子を取り付け、振動子及び面電極に時間的な位相が異
なる高周波電圧を印加する駆動電気回路を接続し、上記
高周波電圧の印加により振動子による高周波の複数の位
相のずれた屈曲振動を移動波として生起し、かつ面電極
により壁面付近に正負のイオンを交互に発生させ、面電
極による粉体の吸着作用がクーロン力で静電的に弱めら
れている間に振動子による移動波の振動力を加えるよう
にして粉体搬送路に付着した粉体を高周波振動力とクー
ロン力の相互作用で壁面から離脱させ搬送するようにし
て成る粉体搬送装置の構成とすることもできる。[0009] Also, the as second means, the transducer of the plate-like piezoelectric element having a plurality of surface electrodes sandwiching the powder conveyance path insulating layer on the wall surface the inner surface of which conveys the powder in a predetermined direction to solve the above problems , And the oscillator and the surface electrode have different time phases.
Comprising a high frequency voltage to connect the electrical drive circuit for applying a high frequency of a plurality of positions by the vibrator by applying a high-frequency voltage
It occurred flexural vibration with shifted phase as the mobile wave, and alternately generates positive and negative ions in the vicinity of the wall surface by a surface electrode, the surface conductivity
The adsorption action of the powder by the poles is weakened electrostatically by the Coulomb force.
While moving, apply the vibration force of the moving wave by the oscillator
The powder adhering to the powder conveying path can be configured of a powder conveying apparatus comprising as conveyed is detached from the wall by the interaction of high frequency vibration force and the Coulomb force in the.
【0010】[0010]
【0011】[0011]
【0012】1つの面電極とその近くに置かれた対電
極、あるいは互いに絶縁された複数の面電極の場合、対
電極間又は複電極間で異なる極性の直流高電圧を印加す
る。それぞれの電極付近では正又は負のイオンが発生し
上記と同様の作用で壁面から粉体が離脱する。なお、上
記電圧源電源回路から印加する電圧は、空気の電気絶縁
破壊に至らない暗電流が流れる程度の値が最適である。In the case of one surface electrode and a counter electrode placed in the vicinity thereof, or a plurality of surface electrodes insulated from each other, high DC voltages having different polarities are applied between the counter electrodes or between the multiple electrodes. Positive or negative ions are generated in the vicinity of each electrode, and the powder is separated from the wall surface by the same action as above. The voltage applied from the voltage source power supply circuit is optimally a value at which a dark current that does not result in electrical breakdown of air flows.
【0013】[0013]
【作用】第1の解決手段では、粉体搬送路の壁に取り付
けられた複数の振動子に駆動電気回路から高周波電圧を
印可し、かつ壁面に設けられた複数の電極に電圧源電気
回路から直流高電圧を印加する。このようなそれぞれの
印加電圧により機能を付加したことによる2つの作用が
複合して相互作用し、機械的な振動力と電気的なクーロ
ン力が重なって壁面に付着している粉体を離脱させる。According to the first solution, a high frequency voltage is applied from a drive electric circuit to a plurality of vibrators attached to the wall of the powder conveying path, and a plurality of electrodes provided on the wall are supplied from a voltage source electric circuit. Apply high DC voltage. Powder such two actions due to the addition of the by Ri functions to each of the applied voltage to interact with complex, adhering to the wall surface overlapping mechanical vibration force and electric Coulomb force To leave.
【0014】また、第2の解決手段では、粉体搬送路の
壁面に取り付けられた面電極を有する平板状の振動子に
駆動電気回路から高周波電圧を印加すると、振動子によ
って壁面に横振動が生じるとともに、振動子の面電極に
は高電圧が印加されているので、壁面に付着した粉体は
正または負に帯電する。そのため、上記第1の解決手段
の場合と同じく、機械的な振動力と電気的なクーロン力
が重なって壁面に付着している粉体を離脱させる。In the second solving means, when a high frequency voltage is applied from the drive electric circuit to the flat plate-shaped vibrator having the surface electrode attached to the wall surface of the powder conveying path, the vibrator causes lateral vibration on the wall surface. At the same time, since a high voltage is applied to the surface electrode of the vibrator, the powder attached to the wall surface is positively or negatively charged. Therefore, as in the case of the first solution, the mechanical vibration force and the electric Coulomb force are overlapped to separate the powder adhering to the wall surface.
【0015】[0015]
【実施例】以下、この発明の粉体搬送装置の実施例を添
付図面を参照して説明する。図1は第1実施例の粉体搬
送装置の縦断面図である。1は粉体輸送の搬送路の途中
に置かれた逆四角垂形状のホッパであり、このホッパ1
の壁2の外面には2つの振動拡大ホーン4a、4bの端
が取り付けられ、それぞれの拡大ホーンに振動源である
電歪体3a、3bから成る2つの振動子5a、5bが接
続されている。それぞれの拡大ホーン4a、4bは壁面
内で生じる定在波の節(ノード)からずれた位置に取り
付けられている。そして、電歪体3a、3bには互いに
時間的な位相あるいは周波数が異なる高周波電圧を発生
する駆動電気回路6が接続されている。ホッパ1の上部
には粉体の供給ノズル10が配設されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the powder carrying device of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a vertical cross-sectional view of the powder carrying device according to the first embodiment. Reference numeral 1 denotes an inverted quadrangular hopper that is placed in the middle of the conveying path for powder transportation.
The ends of the two vibration expanding horns 4a and 4b are attached to the outer surface of the wall 2 of the above, and the two vibrators 5a and 5b including the electrostrictive bodies 3a and 3b, which are vibration sources, are connected to the respective expanding horns. . Each of the expansion horns 4a and 4b is attached at a position deviated from the node of the standing wave generated in the wall surface. The electrostrictive bodies 3a and 3b are connected to a drive electric circuit 6 that generates high-frequency voltages having temporal phases or frequencies different from each other. A powder supply nozzle 10 is arranged above the hopper 1.
【0016】上記の構成からなるこの実施例の粉体搬送
装置において、振動子5a、5bの電歪体3a、3bに
駆動電気回路6から高周波の電圧を印加すると、電歪体
3a、3bの電歪作用によりそれぞれの振動子5a、5
bは高周波電圧に応動した微小な振幅の振動が生じる。
その振動の振幅が拡大ホーン4a、4bによって拡大さ
れ、大きな振幅の振動をホッパ1の壁2に伝える。この
とき、振動子5a、5bの振動は互いに位相又は周波数
が異なるから、振動エネルギを受けとった壁2の表面に
も位相あるいは周波数が異なる2種類の横波振動が生じ
る。In the powder conveying apparatus of this embodiment having the above-mentioned structure, when a high frequency voltage is applied from the drive electric circuit 6 to the electrostrictive bodies 3a and 3b of the vibrators 5a and 5b, the electrostrictive bodies 3a and 3b are moved. Each of the vibrators 5a, 5 due to the electrostrictive action
In b, vibration with a minute amplitude is generated in response to the high frequency voltage.
The amplitude of the vibration is magnified by the magnifying horns 4a and 4b, and the vibration of large amplitude is transmitted to the wall 2 of the hopper 1. At this time, since the vibrations of the vibrators 5a and 5b have different phases or frequencies from each other, two types of transverse wave vibrations having different phases or frequencies are also generated on the surface of the wall 2 which receives the vibration energy.
【0017】そして、2種類の横波振動は合成され、そ
の合成振動の節が不規則に移動する移動波となる。この
高速で変位の大きい移動波の振動力は、壁2の表面に付
着した粉体の吸着力に打ち勝って粉体を空中に跳ね飛ば
す。即ち、粉体が搬送壁面から離脱する。そのため、粉
体は重力によってホッパ1の出口に落下して搬送され
る。Then, the two kinds of transverse wave vibrations are combined, and the nodes of the combined vibration become moving waves which move irregularly. The oscillating force of the moving wave having a large displacement at a high speed overcomes the adsorption force of the powder adhering to the surface of the wall 2 and causes the powder to fly into the air. That is, the powder is separated from the conveying wall surface. Therefore, the powder falls to the outlet of the hopper 1 by gravity and is conveyed.
【0018】このような実施例の粉体搬送装置によれ
ば、搬送路の壁に生じた高周波振動によって吸着した粉
体を跳ね跳ばし、さらに高周波振動は移動波となり、壁
面で定在波の節を全く生じなくしたため、定在波の節の
ところで粉体が凝集することがなくなり、壁面をクリー
ンに保つことができる。According to the powder conveying apparatus of the embodiment as described above, the adsorbed powder is bounced off by the high frequency vibration generated on the wall of the conveying path, and the high frequency vibration becomes a moving wave, and a standing wave is generated on the wall surface. Since no knots are generated, the powder does not agglomerate at the knots of the standing wave, and the wall surface can be kept clean.
【0019】図2は第2実施例の粉体搬送装置の縦断面
図であり、第1の実施例と同じ部材には同じ符号が付し
てある。この実施例ではホッパ1の壁2の内面に絶縁層
7を挟んで縞状に配置した互いに極性が異なる2種類の
面電極8a、8bが交互に独立して設けられている。そ
して、これらの面電極8a、8bには、時間間隔を置い
てプラスとマイナスに替わる直流高電圧を発生する電圧
源電気回路9が接続されている。FIG. 2 is a vertical cross-sectional view of the powder carrying device of the second embodiment, in which the same members as those in the first embodiment are designated by the same reference numerals. In this embodiment, two types of surface electrodes 8a and 8b, which are arranged in stripes with an insulating layer 7 sandwiched therebetween, and which have different polarities, are provided alternately and independently on the inner surface of the wall 2 of the hopper 1. A voltage source electric circuit 9 for generating a DC high voltage that changes between positive and negative at a time interval is connected to the surface electrodes 8a and 8b.
【0020】上記の構成からなるこの実施例の粉体搬送
装置において、面電極8a、8bに電圧源電気回路9に
よって空気の絶縁破壊が生じるより低い値の直流高電圧
を印加すると、空気を介して微弱な放電電流が面電極8
a、8b間に流れ、周辺に正負のイオンが生成される。
このイオンの内、面電極8a、8bのそれぞれと異極性
のイオンは面電極8a、8bに吸引されて大部分は消滅
する。そして、残ったそれぞれのイオンは粉体に付着し
て帯電し、それぞれ面電極8a、8bの表面に吸着され
る。In the powder conveying apparatus of this embodiment having the above-mentioned structure, when a DC high voltage having a lower value than that at which dielectric breakdown of air is caused by the voltage source electric circuit 9 is applied to the surface electrodes 8a and 8b, the air is mediated by the air. And a weak discharge current is applied to the surface electrode 8
Flowing between a and 8b, positive and negative ions are generated in the periphery.
Of these ions, the ions having polarities different from those of the surface electrodes 8a and 8b are attracted to the surface electrodes 8a and 8b and most of them disappear. Then, each of the remaining ions adheres to the powder and is charged, and is adsorbed on the surfaces of the surface electrodes 8a and 8b.
【0021】一方、面電極8a、8bと同極性のイオン
は粉体に付着して帯電し、粉体と共にクーロン力により
反撥して面電極8a、8bから遠ざかりホッパ1の壁2
の面から離脱する。その後、一定時間を経過して面電極
8a、8bに印加している直流高電圧の極性を入れ替え
ると、面電極面8a、8bに吸着していた異極性に帯電
した粉体は、面電極8a、8bと同極となるためクーロ
ン力で壁2から離脱する。その後、極性の入替え前と同
じように微弱な放電が始まり、周辺に正負のイオンを生
成する。このような作業を繰り返すことにより粉体は壁
2から離脱し、重力によりホッパ1の出口に落下して搬
送される。On the other hand, the ions having the same polarity as the surface electrodes 8a and 8b are attached to the powder and charged, and are repelled by the Coulomb force together with the powder to move away from the surface electrodes 8a and 8b and to the wall 2 of the hopper 1.
To leave the plane. After that, when a certain period of time has passed and the polarities of the DC high voltage applied to the surface electrodes 8a and 8b are exchanged, the powder charged to the surface electrodes 8a and 8b and charged to the opposite polarity is changed to the surface electrodes 8a. , 8b and the same polarity, they separate from the wall 2 by Coulomb force. After that, a weak discharge is started in the same way as before the polarity was changed, and positive and negative ions are generated in the periphery. By repeating such an operation, the powder separates from the wall 2 and falls to the outlet of the hopper 1 by gravity and is conveyed.
【0022】以上のように、この第2の実施例では搬送
路の壁に周期的に極性が交替する高電圧を印加するよう
にしたから、粉体を帯電させてクーロン力によって吸着
した粉体を跳ね跳ばし、壁面をクリーンに保つことがで
きる。As described above, in the second embodiment, since the high voltage with which the polarity is periodically changed is applied to the wall of the conveying path, the powder is charged and the powder adsorbed by the Coulomb force is adsorbed. You can bounce off and keep the walls clean.
【0023】図3は第3実施例の粉体搬送装置の縦断面
図であり、第1の実施例と同じ部材には同じ符号が付し
てある。1は粉体輸送の搬送路の途中に置かれた逆四角
垂形状のホッパである。ホッパ1の壁2の外面には振動
拡大ホーン4の端が取り付けられ、その拡大ホーンに振
動源である電歪体3から成る振動子5が接続されてい
る。そして、振動子5の電歪体3には、高周波電圧を発
生する駆動電気回路6が接続されている。FIG. 3 is a vertical cross-sectional view of the powder conveying device of the third embodiment, in which the same members as those in the first embodiment are designated by the same reference numerals. Reference numeral 1 is an inverted quadrangular hopper that is placed in the middle of the conveying path for powder transportation. An end of a vibration magnifying horn 4 is attached to the outer surface of the wall 2 of the hopper 1, and a vibrator 5 composed of an electrostrictive body 3 as a vibration source is connected to the magnifying horn. A drive electric circuit 6 that generates a high frequency voltage is connected to the electrostrictive body 3 of the vibrator 5.
【0024】一方、ホッパ1の壁2の内面には、絶縁層
7を挟んで縞状に配置した互いに極性が異なる2種類の
面電極8a、8bが交互に独立して設けられている。そ
して、これらの面電極8a、8bには、時間間隔を置い
てプラスとマイナスに替わる直流高電圧を発生する電圧
源電気回路9が接続されている。On the other hand, on the inner surface of the wall 2 of the hopper 1, two types of surface electrodes 8a and 8b, which are arranged in stripes with the insulating layer 7 in between and which have different polarities, are provided alternately and independently. A voltage source electric circuit 9 for generating a DC high voltage that changes between positive and negative at a time interval is connected to the surface electrodes 8a and 8b.
【0025】上記の構成からなるこの実施例の粉体搬送
装置において、第2実施例と同様に面電極8a、8bに
電圧源電気回路9から直流高電圧を印加すると、面電極
8a、8bの周辺に正負のイオンを生成する。そして、
粉体に正負のイオンを帯電させ、電極表面でクーロン力
による吸着と離脱を繰り返す。In the powder conveying apparatus of this embodiment having the above-mentioned structure, when a high DC voltage is applied to the surface electrodes 8a, 8b from the voltage source electric circuit 9 as in the second embodiment, the surface electrodes 8a, 8b are formed. Positive and negative ions are generated in the periphery. And
The powder is charged with positive and negative ions, and adsorption and desorption by the Coulomb force are repeated on the electrode surface.
【0026】このような面電極8a、8bによる粉体の
吸着、離脱作用と共に、振動子5の電歪体3に駆動電気
回路6から高周波の電圧を印加すると、大きな振幅の振
動がホッパ1の壁2で生じる。そして、壁2の表面に付
着した粉体が静電的に吸着力が弱められている間にさら
に上記振動子5による振動力が加わると粉体が壁2から
吹き飛ばされ壁2から離脱する。このため、その後粉体
は重力によってホッパ1の出口に落下して搬送される。When a high frequency voltage is applied to the electrostrictive body 3 of the vibrator 5 from the drive electric circuit 6 in addition to the action of adsorbing and desorbing the powder by the surface electrodes 8a and 8b, vibration of large amplitude is generated in the hopper 1. It occurs on wall 2. Then, when the vibrating force of the vibrator 5 is further applied while the adsorption force of the powder adhered to the surface of the wall 2 is electrostatically weakened, the powder is blown off from the wall 2 and separated from the wall 2. Therefore, thereafter, the powder falls to the outlet of the hopper 1 by gravity and is conveyed.
【0027】上記第3実施例では搬送路の壁に高電圧の
印加と高周波振動の発生を同時にさせるようにしたか
ら、振動力とクーロン力の相乗作用で吸着した粉体を有
効に離脱させ、壁面をクリーンに保つことができる。In the third embodiment, since the high voltage is applied to the wall of the conveying path and the high frequency vibration is generated at the same time, the adsorbed powder is effectively released by the synergistic action of the vibration force and the Coulomb force. The wall surface can be kept clean.
【0028】さらに、図4に第4実施例の粉体搬送装置
の縦断面図を示す。第1実施例と同じく、1は粉体輸送
の搬送路の途中に置かれた逆四角垂形状のホッパであ
る。ホッパ1の壁2の内面には、定在波の1/2波長の
矩形の多数の面電極8c、8dを有する板状圧電体の振
動子5dと、矩形の多数の面電極8c’、8d’を有す
る板状圧電体の振動子5cが、それぞれ定在波の1/4
波長離れた位置で絶縁層7を介して張り付けられてい
る。そして、振動子5c、5dの電極8c、8d、8
c’、8d’にはそれぞれの間で時間的な位相が90°
異なる高周波電圧を発生する駆動電気回路6が接続され
ている。Further, FIG. 4 shows a vertical cross-sectional view of the powder carrying device of the fourth embodiment. As in the first embodiment, reference numeral 1 denotes an inverted quadrangular hopper placed in the middle of the powder transporting path. On the inner surface of the wall 2 of the hopper 1, a plate-shaped piezoelectric vibrator 5d having a large number of rectangular surface electrodes 8c and 8d of 1/2 wavelength of a standing wave, and a large number of rectangular surface electrodes 8c 'and 8d. , The plate-shaped piezoelectric vibrators 5c each have 1/4 of the standing wave.
It is attached via the insulating layer 7 at a position separated by the wavelength. Then, the electrodes 8c, 8d, 8 of the vibrators 5c, 5d
The time phase is 90 ° between c'and 8d '.
A drive electric circuit 6 for generating different high frequency voltages is connected.
【0029】上記の構成からなるこの実施例の粉体搬送
装置において、面電極8c、8c’、8d、8d’に駆
動電気回路6から高周波の電圧を印加すると、振動子5
c、5dには複数の位相のずれた屈曲振動が生じる。こ
れらの屈曲振動は、壁2内で合成され、移動波となって
壁2の表面で移動する。同時に、面電極8c、8c’、
8d、8d’の周辺に正負のイオンを生成する。In the powder conveying apparatus of this embodiment having the above-mentioned structure, when a high frequency voltage is applied from the driving electric circuit 6 to the surface electrodes 8c, 8c ', 8d, 8d', the vibrator 5
A plurality of flexural vibrations out of phase occur in c and 5d. These bending vibrations are combined in the wall 2 and become a moving wave, which moves on the surface of the wall 2. At the same time, the surface electrodes 8c, 8c ',
Positive and negative ions are generated around 8d and 8d '.
【0030】そして、第2実施例のごとく、粉体を正負
のイオンで帯電させ、電極表面でクーロン力による吸着
と離脱を繰り返す。このとき、振動子5c、5dによ
り、表面に付着した粉体が静電的に吸着力が弱められて
いる間にさらに上記振動子5c、5dによる振動力が加
わり、粉体が壁2から吹き飛ばされ壁2から離脱する。
このため、その後粉体は重力によってホッパ1の出口に
落下して搬送される。Then, as in the second embodiment, the powder is charged with positive and negative ions, and adsorption and desorption by the Coulomb force are repeated on the electrode surface. At this time, the vibrating force of the vibrators 5c and 5d is further applied while the attraction force of the powder adhered to the surface is electrostatically weakened by the vibrators 5c and 5d, and the powder is blown off from the wall 2. The wall 2 is removed.
Therefore, thereafter, the powder falls to the outlet of the hopper 1 by gravity and is conveyed.
【0031】上記第4実施例では搬送路の壁に張り付け
られた板状の電歪体で高電圧の印加と高周波振動の発生
を同時にさせるようにしたから、振動力とクーロン力の
相乗作用で吸着した粉体を有効に離脱させ、壁面をクリ
ーンに保つことができる。In the fourth embodiment, the plate-shaped electrostrictive body attached to the wall of the conveying path is used to simultaneously apply a high voltage and generate a high frequency vibration. Therefore, a synergistic effect of the vibration force and the Coulomb force is obtained. The adsorbed powder can be effectively released and the wall surface can be kept clean.
【0032】[0032]
【発明の効果】以上詳細に説明したように、第1及び第
2の発明は高周波振動とクーロン力の組合せによって粉
体を跳ね跳ばし、あるいは粉体を搬送面から引き離すよ
うにしたから、常に壁面をクリーンに保つことができ、
異粉体が混入するのを防止するための清掃をする必要が
なくなるという利点が得られる。As described in detail above , the first and second
According to the second aspect of the invention, the powder is bounced off by the combination of the high frequency vibration and the Coulomb force, or the powder is separated from the conveying surface, so that the wall surface can be always kept clean.
An advantage is obtained in that it is not necessary to perform cleaning to prevent foreign particles from being mixed.
【図1】第1実施例の粉体搬送装置の縦断面図FIG. 1 is a vertical sectional view of a powder carrying device according to a first embodiment.
【図2】第2実施例の粉体搬送装置の縦断面図FIG. 2 is a vertical sectional view of a powder carrying device according to a second embodiment.
【図3】第3実施例の粉体搬送装置の縦断面図FIG. 3 is a vertical sectional view of a powder carrying device according to a third embodiment.
【図4】第4実施例の粉体搬送装置の縦断面図FIG. 4 is a vertical sectional view of a powder carrying device according to a fourth embodiment.
1 ホッパ 2 壁 3、3a、3b 電歪体 4、4a、4b 拡大ホーン 5、5a、5b、5c、5c’、5d、5d’ 振動子 6 駆動電気回路 7 絶縁層 8a、8b、8c、8c’、8d、8d’ 面電極 9 電圧源電気回路 10 供給ノズル 1 hopper 2 walls 3, 3a, 3b Electrostrictive body 4, 4a, 4b Expansion horn 5, 5a, 5b, 5c, 5c ', 5d, 5d' transducers 6 drive electric circuit 7 Insulation layer 8a, 8b, 8c, 8c ', 8d, 8d' surface electrodes 9 Voltage source electric circuit 10 supply nozzles
Claims (2)
壁面外面に振動子からの振動が伝達されるように振動子
を連結し、振動子に高周波電圧を印加する駆動電気回路
を接続し、かつ上記壁面内面に絶縁層を挟んで互いに極
性が異なる2種類の面電極を縞状に交互に独立して配設
し、この面電極に一定時間間隔で極性が変化する電圧を
印加する電圧源電気回路を接続し、上記高周波電圧の印
加による振動子の振動に基づき搬送路の壁面に合成振動
の節が不規則に移動する高周波振動を生じさせるととも
に、上記面電極に流れる放電電流で搬送路壁面に沿って
生成される正負のイオンを搬送路内の又はその壁面に付
着した粉体に帯電させ、面電極の極性との相違により生
ずるクーロン力で粉体の吸着作用が静電的に弱められて
いる間に振動子による振動力を加えるようにして、振動
力とクーロン力の相互作用により粉体を離脱させて搬送
するようにして成る粉体搬送装置。1. A drive electric circuit for connecting a vibrator to an outer surface of a wall surface of a powder carrying path for carrying powder in a predetermined direction so that vibration from the vibrator is transmitted, and applying a high frequency voltage to the vibrator. And connect the electrodes to each other with an insulating layer sandwiched inside the wall surface.
Two types of surface electrodes having different characteristics are alternately arranged in a striped pattern, and a voltage source electric circuit for applying a voltage whose polarity changes at regular time intervals is connected to the surface electrodes to apply the high frequency voltage. Based on the vibration of the oscillator due to the vibration of the oscillator, high-frequency vibration in which the nodes of the synthetic vibration move irregularly on the wall surface of the transport path is generated, and the positive and negative ions generated along the wall surface of the transport path by the discharge current flowing in the surface electrode are generated. The powder adhering to the inside of the transfer path or the wall surface is charged, and the Coulomb force generated due to the difference in the polarity of the surface electrode electrostatically weakens the powder adsorption action.
Vibration is applied by the vibrator while
A powder conveying device configured to separate and convey powder by the interaction of force and Coulomb force .
壁面内面に絶縁層を挟んで多数の面電極を有する平板状
圧電体の振動子を取り付け、振動子及び面電極に時間的
な位相が異なる高周波電圧を印加する駆動電気回路を接
続し、上記高周波電圧の印加により振動子による高周波
の複数の位相のずれた屈曲振動を移動波として生起し、
かつ面電極により壁面付近に正負のイオンを交互に発生
させ、面電極による粉体の吸着作用がクーロン力で静電
的に弱められている間に振動子による移動波の振動力を
加えるようにして粉体搬送路に付着した粉体を高周波振
動力とクーロン力の相互作用で壁面から離脱させ搬送す
るようにして成る粉体搬送装置。2. A flat-plate piezoelectric vibrator having a large number of surface electrodes with an insulating layer sandwiched between inner surfaces of a wall surface of a powder transfer path for transferring powder in a predetermined direction, and the vibrator and the surface electrodes are temporally arranged.
A drive electric circuit that applies high-frequency voltage with different phases is connected,
A plurality of phase shift and the flexural vibration occurred as a moving wave,
Moreover, positive and negative ions are alternately generated near the wall surface by the surface electrode, and the adsorption action of the powder by the surface electrode is electrostatic by Coulomb force.
The vibrational force of the moving wave
A powder conveying device configured to separate and convey the powder that has been attached to the powder conveying path by the interaction of the high frequency vibration force and the Coulomb force.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP35567292A JP3391490B2 (en) | 1992-12-18 | 1992-12-18 | Powder transfer device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP35567292A JP3391490B2 (en) | 1992-12-18 | 1992-12-18 | Powder transfer device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH06183483A JPH06183483A (en) | 1994-07-05 |
JP3391490B2 true JP3391490B2 (en) | 2003-03-31 |
Family
ID=18445184
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP35567292A Expired - Fee Related JP3391490B2 (en) | 1992-12-18 | 1992-12-18 | Powder transfer device |
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Country | Link |
---|---|
JP (1) | JP3391490B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2911128B1 (en) * | 2007-01-10 | 2009-04-03 | Cogema | DEVICE AND METHOD FOR EMPTYING JARRES |
CN106882563B (en) * | 2017-03-23 | 2019-02-19 | 中国能源建设集团广东省电力设计研究院有限公司 | The control method of preventing plug dredging system |
-
1992
- 1992-12-18 JP JP35567292A patent/JP3391490B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
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JPH06183483A (en) | 1994-07-05 |
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