JPH07102346B2 - Classifier - Google Patents
ClassifierInfo
- Publication number
- JPH07102346B2 JPH07102346B2 JP5156993A JP15699393A JPH07102346B2 JP H07102346 B2 JPH07102346 B2 JP H07102346B2 JP 5156993 A JP5156993 A JP 5156993A JP 15699393 A JP15699393 A JP 15699393A JP H07102346 B2 JPH07102346 B2 JP H07102346B2
- Authority
- JP
- Japan
- Prior art keywords
- supply cylinder
- powder
- injection port
- curved surface
- passage
- 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
Landscapes
- Developing Agents For Electrophotography (AREA)
- Combined Means For Separation Of Solids (AREA)
- Cyclones (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、複写機用のトナー、
セラミックス、薬品等の粉体を微粉と粗粉とに分離する
分級装置に関するものである。BACKGROUND OF THE INVENTION The present invention relates to a toner for a copying machine,
The present invention relates to a classifying device for separating powder such as ceramics and chemicals into fine powder and coarse powder.
【０００２】[0002]
【従来の技術】分級室内にトナー等の粉体を供給し、そ
の粉体を分級室内で旋回させて微粉と粗粉とに遠心分離
する分級機は従来から知られている。2. Description of the Related Art A classifier for supplying powder such as toner into a classifying chamber and rotating the powder in the classifying chamber to centrifuge into fine powder and coarse powder has been known.
【０００３】[0003]
【発明が解決しようとする課題】ところで、遠心分離法
による分級機においては、凝集性の強い粉体の場合、分
級室内において粉体を効果的に分散させることができ
ず、粗粉に微粉が付着し、粗粉中に微粉が多く混入する
という問題があった。By the way, in the classifier by the centrifugal separation method, in the case of the powder having a strong cohesive property, the powder cannot be effectively dispersed in the classifying chamber, and the fine powder is converted into the coarse powder. There is a problem that the fine powder is attached to the coarse powder and a large amount of fine powder is mixed into the coarse powder.
【０００４】この発明は上記の問題点を解決し、凝集性
の強い粉体でもきわめて効果的に精度よく分級すること
ができる分級装置を提供することを技術的課題としてい
る。It is a technical object of the present invention to solve the above-mentioned problems and to provide a classifying device capable of extremely effectively and accurately classifying even powder having a strong cohesive property.
【０００５】[0005]
【課題を解決するための手段】上記の課題を解決するた
めに、この発明においては、ケーシング１内の上部に噴
射口１０を下端に有する加圧気流供給用の第１供給筒４
を設け、その第１供給筒４の上部閉塞端を貫通し、下端
の出口が上記噴射口１０と同軸上で対向する粉体供給用
の第２供給筒１２を設け、この第２供給筒１２の外周面
と第１供給筒４の内周面間に円筒路８と、この円筒路８
の下端から噴射口１０に向けて径が次第に小さくなる円
錐路９とを形成し、前記第１供給筒４の上端部に上記円
筒路８内に流体を旋回流入させる第１導入路１１を形成
し、第１供給筒４の下面外周部に曲面５を設け、前記ケ
ーシング１内には、そのケーシング１内の上下方向に複
数の回収室１８、１９を形成する環状の分級板１５を取
付け、その分級板１５の内周縁と前記第１供給筒４の曲
面５間に環状の隙間１７を形成した構成を採用したので
ある。In order to solve the above-mentioned problems, in the present invention, a first supply cylinder 4 for supplying a pressurized air flow having an injection port 10 at the lower end in the upper part of a casing 1 is provided.
And a second supply cylinder 12 for powder supply, which penetrates the upper closed end of the first supply cylinder 4 and has an outlet at the lower end coaxially facing the injection port 10. A cylindrical path 8 between the outer peripheral surface of the first supply cylinder 4 and the inner peripheral surface of the first supply cylinder 4;
Forming a conical passage 9 having a diameter gradually decreasing from the lower end toward the injection port 10, and forming a first introduction passage 11 at the upper end of the first supply cylinder 4 for swirling and flowing the fluid into the cylindrical passage 8. Then, a curved surface 5 is provided on the outer peripheral portion of the lower surface of the first supply cylinder 4, and an annular classification plate 15 that forms a plurality of recovery chambers 18 and 19 in the vertical direction in the casing 1 is attached in the casing 1. The annular gap 17 is formed between the inner peripheral edge of the classifying plate 15 and the curved surface 5 of the first supply cylinder 4.
【０００６】ここで、第２供給筒１２の上部に粉体を旋
回流入させる第２導入路１４を設けてもよい。また、第
１供給筒４の下端の噴射口１０と所要の間隔をおいて整
流体３２を設け、その整流体３２に噴出口１０から噴出
する粉体と加圧気流の混合流体を第１供給筒４の曲面５
に沿わせる凹曲面３３を形成してもよい。Here, a second introduction passage 14 for swirling and injecting the powder may be provided above the second supply cylinder 12. Further, a rectifying body 32 is provided at a required distance from the injection port 10 at the lower end of the first supply cylinder 4, and the rectifying body 32 is first supplied with a mixed fluid of powder and a pressurized air stream ejected from the ejection port 10. Curved surface 5 of cylinder 4
You may form the concave curved surface 33 which follows.
【０００７】[0007]
【作用】上記の構成から成る分級装置は、第１導入路１
１から第１供給筒４内に加圧気流が供給され、その加圧
気流が第１供給筒４内の円筒路８を旋回して円錐路９に
流れ、第１供給筒４の下端の噴射口１０から噴出される
気流の流れによって第２供給筒１２内に送り込まれる粉
体を円錐路９内に吸引する。その粉体を上記加圧気流と
合流させて旋回させ、この合流された混合流体を噴射口
１０内において音速まで加速し、激しい分散作用を生じ
させたのち、回収室１８内に噴出させて急激に膨張さ
せ、その膨張によって粉体を単一粒子まで分散させる。
回収室１８における混合流体の旋回流により粉体を微粉
と粗粉とに遠心分離し、コアンダ効果によって第１供給
筒４の曲面５に沿って流れる微粉を分級板１５と第１供
給筒４の曲面５間に形成された隙間から微粉回収室に流
入させて回収する。The classifying device having the above-described structure is provided with the first introduction path 1
1, the pressurized airflow is supplied into the first supply cylinder 4, and the pressurized airflow swirls the cylindrical path 8 in the first supply cylinder 4 and flows to the conical path 9 to inject the lower end of the first supply cylinder 4. The powder fed into the second supply cylinder 12 is sucked into the conical passage 9 by the flow of the airflow ejected from the mouth 10. The powder is merged with the pressurized air flow and swirled, and the mixed fluid thus merged is accelerated to the sonic velocity in the injection port 10 to cause a vigorous dispersion action, and then jetted into the recovery chamber 18 to rapidly The powder is dispersed into single particles by the expansion.
The powder is centrifugally separated into fine powder and coarse powder by the swirling flow of the mixed fluid in the recovery chamber 18, and the fine powder flowing along the curved surface 5 of the first supply cylinder 4 by the Coanda effect is separated between the classification plate 15 and the first supply cylinder 4. The fine powder is allowed to flow into the fine powder collection chamber through the gap formed between the curved surfaces 5 and collected.
【０００８】[0008]
【実施例】以下、この発明の実施例を添付図面に基づい
て説明する。Embodiments of the present invention will be described below with reference to the accompanying drawings.
【０００９】図１乃至図３に示すように、ケーシング１
は円筒形をなし、その上下端は上部端壁２および下部端
壁３によって閉塞されている。As shown in FIGS. 1 to 3, the casing 1
Has a cylindrical shape, and its upper and lower ends are closed by an upper end wall 2 and a lower end wall 3.
【００１０】上部端壁２の下面には第１供給筒４が設け
られ、その第１供給筒４の下端に噴射口１０が形成され
ている。また、第１供給筒４の下面外周部には曲面５が
設けられている。一方、下部端壁３の上面には前記曲面
５に対向した凹曲面６が形成され、その凹曲面６の中心
部に吸引孔７が設けられている。A first supply cylinder 4 is provided on the lower surface of the upper end wall 2, and an injection port 10 is formed at the lower end of the first supply cylinder 4. A curved surface 5 is provided on the outer peripheral portion of the lower surface of the first supply cylinder 4. On the other hand, a concave curved surface 6 facing the curved surface 5 is formed on the upper surface of the lower end wall 3, and a suction hole 7 is provided at the center of the concave curved surface 6.
【００１１】第１供給筒４の内部には第２供給筒１２が
設けられている。第２供給筒１２は先細ノズル部１３を
下部に有し、その下端の開口は上記噴射口１０と所要の
間隔をおいて同軸上で対向している。A second supply cylinder 12 is provided inside the first supply cylinder 4. The second supply cylinder 12 has a tapered nozzle portion 13 in the lower portion, and the opening at the lower end thereof is coaxially opposed to the injection port 10 with a required space.
【００１２】第１供給筒４の内周面と第２供給筒１２の
外周面間には円筒路８と、その円筒路８の下端から噴射
口１０に向けて径が次第に小さくなる円錐路９とが設け
られ、上記円筒路８の上部に第１導入路１１が連通され
ている。第１導入路１１は、図３に示すように、うず巻
状をなし、上記円筒路８内に気流を旋回流入させるよう
になっている。A cylindrical passage 8 is provided between the inner peripheral surface of the first supply cylinder 4 and the outer peripheral surface of the second supply cylinder 12, and a conical passage 9 whose diameter gradually decreases from the lower end of the cylindrical passage 8 toward the injection port 10. Are provided, and the first introduction passage 11 is communicated with the upper portion of the cylindrical passage 8. As shown in FIG. 3, the first introduction path 11 has a spiral shape and swirls the airflow into the cylindrical path 8.
【００１３】第２供給筒１２の内側上部には第２導入路
１４が連通し、この第２導入路１４は図２に示すように
うず巻状をなし、第２供給筒１２の内部に粉体を旋回流
入させるようになっている。A second introducing passage 14 communicates with an upper part of the inside of the second supplying cylinder 12, and the second introducing passage 14 has a spiral shape as shown in FIG. It is designed to swirl the body.
【００１４】前記ケーシング１の内部には分級板１５が
組込まれている。分級板１５は環状をなし、その内周縁
１６と第１供給筒４の曲面５間に環状の隙間１７が形成
されている。上記分級板１５の組込みによって上記ケー
シング１内の軸方向に粗粉回収室１８と微粉回収室１９
とが設けられ、その両室１８、１９のそれぞれに接線方
向に延びる粗粉排出筒２０と微粉排出筒２１とが接続さ
れている。A classifying plate 15 is incorporated in the casing 1. The classifying plate 15 has an annular shape, and an annular gap 17 is formed between the inner peripheral edge 16 and the curved surface 5 of the first supply cylinder 4. By incorporating the classification plate 15, the coarse powder collecting chamber 18 and the fine powder collecting chamber 19 are axially arranged in the casing 1.
Is provided, and a coarse powder discharge cylinder 20 and a fine powder discharge cylinder 21 extending in the tangential direction are connected to the chambers 18 and 19, respectively.
【００１５】図４は、上記の構成から成る分級装置の使
用の一例を示し、トナー等の粉体は供給機２２から供給
口２３内に定量供給され、その供給口２３と第２導入路
１４は通路２４で接続されている。FIG. 4 shows an example of the use of the classifying device having the above-described structure. Powder such as toner is quantitatively supplied from the supply device 22 into the supply port 23, and the supply port 23 and the second introduction path 14 are provided. Are connected by a passage 24.
【００１６】いま、粗粉排出筒２０および微粉排出筒２
１のそれぞれに吸引力を付与した状態において、第１導
入路１１に加圧気流を供給すると、この気流は円筒路８
内に流入して旋回し、円錐路９から噴射口１０に流れ、
粗粉回収室１８内に噴出する。その気流の流れによって
第２供給筒１２内の圧力が低下し、供給機２２から供給
口２３内に定量供給された粉体が第２導入路１４から第
２供給筒１２内に吸引される。Now, the coarse powder discharge cylinder 20 and the fine powder discharge cylinder 2
When a pressurized air flow is supplied to the first introduction passage 11 in a state where the suction force is applied to each of the first passages 1,
Flows in and swirls, flows from the conical passage 9 to the injection port 10,
It spouts into the coarse powder recovery chamber 18. The pressure in the second supply cylinder 12 is reduced by the flow of the air flow, and the powder that is quantitatively supplied from the supply device 22 into the supply port 23 is sucked into the second supply cylinder 12 from the second introduction path 14.
【００１７】粉体は、第２供給筒１２内で旋回し、その
粉体と加圧気流の混合流体は先細ノズル部１３から第１
供給筒４内の円錐路９に流れ、その円錐路９内で旋回す
る気流と合流する。その合流時、加圧気流と粉体の流速
が相違するため、粉体に粒子相互の衝突や旋回流同士の
せん断による分散力が作用し、粉体は一次分散される。The powder swirls in the second supply cylinder 12, and the mixed fluid of the powder and the pressurized air flows from the tapered nozzle portion 13 to the first
It flows into the conical passage 9 in the supply cylinder 4 and joins with the swirling airflow in the conical passage 9. At the time of the merging, since the pressurized air flow and the powder flow velocity are different from each other, the powder is subjected to a dispersive force due to the collision of the particles with each other or the shear of the swirling flows, and the powder is primarily dispersed.
【００１８】上記混合流体は噴射口１０に至り、その噴
射口１０によって音速まで加速され、強力な旋回流が形
成される。この旋回流は噴射口１０から粗粉回収室１８
内に噴出し、その粗粉回収室１８において急激に膨張す
る。その膨張によって粉体に強力な分散力が作用し、粉
体は一次粒子まで二次分散され、粗粉と微粉とに分離さ
れる。The mixed fluid reaches the injection port 10 and is accelerated up to the sonic velocity by the injection port 10 to form a strong swirling flow. This swirling flow is discharged from the injection port 10 to the coarse powder recovery chamber 18
It spouts into the inside and rapidly expands in the coarse powder recovery chamber 18. A strong dispersing force acts on the powder due to the expansion, and the powder is secondarily dispersed up to the primary particles and separated into coarse powder and fine powder.
【００１９】また、上記膨張によって旋回流は速度が減
衰されて亜音速となり、その旋回流が粗粉回収室１８内
において旋回する作用によって吸引孔７から粗粉回収室
１８内に二次エアが吸入され、その吸入エアによって旋
回流は第１供給筒４の曲面５に沿って安定よく移動し、
遠心力の小さい微粉はコアンダ効果により第１供給筒４
の曲面５に沿って流れて隙間１７から微粉回収室１９内
に流入し、微粉排出筒２１から回収される。Further, due to the expansion, the swirling flow is attenuated in velocity to become a subsonic velocity, and the swirling flow swirls in the coarse powder recovery chamber 18 to generate secondary air from the suction hole 7 into the coarse powder recovery chamber 18. The swirling flow is sucked, and the swirling flow moves stably along the curved surface 5 of the first supply cylinder 4,
Fine powder with small centrifugal force is fed by the first supply cylinder 4 due to the Coanda effect.
Flow along the curved surface 5 of the above, flow into the fine powder collection chamber 19 through the gap 17, and are collected from the fine powder discharge cylinder 21.
【００２０】一方、遠心力の大きい粗粉は、粗粉回収室
１８内において旋回して外径方向に移動し、粗粉排出筒
２０から回収される。On the other hand, the coarse powder having a large centrifugal force swirls in the coarse powder recovery chamber 18 and moves in the outer diameter direction, and is recovered from the coarse powder discharge cylinder 20.
【００２１】なお、分級板１５の内径部に図１に示すよ
うに、テーパ部２５を設け、粗粉排出筒２０および微粉
排出筒２１のそれぞれを上記テーパ部２５の傾斜方向に
傾斜させておくと、微粉および粗粉を対応する排出筒２
０、２１内にスムーズに流入させることができる。As shown in FIG. 1, a taper portion 25 is provided in the inner diameter portion of the classifying plate 15, and each of the coarse powder discharge cylinder 20 and the fine powder discharge cylinder 21 is inclined in the inclination direction of the taper portion 25. And the corresponding discharge tube 2 for fine powder and coarse powder
It can be made to flow smoothly into 0 and 21.
【００２２】また、分級板１５を高さ調整自在に設けて
おくことにより、その分級板１５の高さ調整によって分
級板１５の内周縁１６と第１供給筒４の曲面５間の隙間
１７の大きさを変化させることができるため、粉体の分
級点を任意に調整することができる。Further, since the height of the classifying plate 15 is adjustable, the height 17 of the classifying plate 15 adjusts the clearance 17 between the inner peripheral edge 16 of the classifying plate 15 and the curved surface 5 of the first supply cylinder 4. Since the size can be changed, the classification point of the powder can be adjusted arbitrarily.
【００２３】図１に示す実施例では、ケーシング１内に
一枚の分級板１５を設けたが、分級板１５の数はこれに
限定されるものではない。例えば、図５に示すように、
ケーシング１内に２枚の分級板１５ａ、１５ｂを設けて
ケーシング１内の軸方向に微粉回収室１９、細粉回収室
２６および粗粉回収室１８を形成し、各回収室１９、２
６、１８に排出筒２１、２７、２０を接続して粉体を３
段階に分級してもよい。In the embodiment shown in FIG. 1, one classifying plate 15 is provided in the casing 1, but the number of classifying plates 15 is not limited to this. For example, as shown in FIG.
Two classifying plates 15a and 15b are provided in the casing 1 to form a fine powder collecting chamber 19, a fine powder collecting chamber 26, and a coarse powder collecting chamber 18 in the axial direction in the casing 1, and the collecting chambers 19 and 2 are provided.
Connect the discharge cylinders 21, 27 and 20 to 6 and 18
You may classify in stages.
【００２４】図６(イ) 、(ロ) 、(ハ) は第１供給筒４の他
の例を示す。FIGS. 6A, 6B and 6C show another example of the first supply cylinder 4.
【００２５】図６(イ) に示す第１供給筒４においては、
噴射口１０の内周下部と第１供給筒４の外周下部に曲率
の異なる二つの曲面５ａ、５ｂを設けた例を示す。In the first supply cylinder 4 shown in FIG. 6 (a),
An example in which two curved surfaces 5a and 5b having different curvatures are provided on the lower inner circumference of the injection port 10 and the lower outer circumference of the first supply cylinder 4 is shown.
【００２６】図６(ロ) に示す第１供給筒４においては、
噴射口１０の内周下部と第１供給筒４の外周下部とに略
等しい曲率の曲面５ａ、５ｂを設けた例を示す。In the first supply cylinder 4 shown in FIG. 6B,
An example is shown in which curved surfaces 5a and 5b having substantially equal curvatures are provided in the inner lower portion of the injection port 10 and the outer lower portion of the first supply cylinder 4.
【００２７】図６(ハ) に示す第１供給筒４には、下部外
周に平坦面５ｃと、その外側に曲面５を設けた例を示
す。The first supply cylinder 4 shown in FIG. 6C shows an example in which a flat surface 5c is provided on the outer periphery of the lower portion and a curved surface 5 is provided on the outer side thereof.
【００２８】いずれの第１供給筒４においても噴射口１
０から流出する混合流体を第１供給筒４の下端外周面に
沿って流動させることができ、特に、図６(イ) 、(ロ) の
ように、２つの曲面５ａ、５ｂを形成した第１供給筒４
においては、下部外周に沿って流れる付着流の安定化を
図ることができ、分級効率の向上に大きな効果を挙げる
ことができる。In each of the first supply cylinders 4, the injection port 1
The mixed fluid flowing out from 0 can be made to flow along the outer peripheral surface of the lower end of the first supply cylinder 4, and in particular, as shown in FIGS. 6 (a) and 6 (b), the two curved surfaces 5a and 5b are formed. 1 supply cylinder 4
In the above, it is possible to stabilize the adhering flow flowing along the outer circumference of the lower portion, and it is possible to exert a great effect on the improvement of the classification efficiency.
【００２９】図７および図８は、この発明に係る分級装
置の他の実施例を示す。この実施例における分級装置に
おいては、筒状ケーシング１の下部に粗粉回収用のホッ
パ３０を接続し、そのホッパ３０を半径方向に貫通する
二次エア導入パイプ３１の内端部を上方に折曲げ、その
上端開口を第１供給筒４の下端に所要の間隔をおいて対
向配置している。7 and 8 show another embodiment of the classifying device according to the present invention. In the classifying device of this embodiment, a hopper 30 for collecting coarse particles is connected to the lower part of the cylindrical casing 1, and an inner end portion of a secondary air introducing pipe 31 that radially penetrates the hopper 30 is folded upward. The upper end opening is bent and is arranged so as to face the lower end of the first supply cylinder 4 with a required space.
【００３０】また、第１供給筒４の下端と二次エア導入
パイプ３１の上端間に整流体３２を設け、その整流体３
２の第１供給筒４と対向する上面に凹曲面３３を形成し
ている。A rectifying body 32 is provided between the lower end of the first supply cylinder 4 and the upper end of the secondary air introducing pipe 31, and the rectifying body 3 is provided.
A concave curved surface 33 is formed on the upper surface facing the second supply cylinder 4.
【００３１】さらに、第２供給筒１２内に挿入したニー
ドル軸３４にシリンダ３５を接続し、そのシリンダ３５
の作用によりニードル軸３４を軸方向に移動させ、第２
供給筒１２の下端開口を開閉させるようにしている。Further, a cylinder 35 is connected to the needle shaft 34 inserted in the second supply cylinder 12, and the cylinder 35
The needle shaft 34 is moved in the axial direction by the action of
The lower end opening of the supply cylinder 12 is opened and closed.
【００３２】上記のように、第１供給筒４の下方に整流
体３２を設けると、第１供給筒４の噴射口１０から噴出
する気流中の粉体は上記整流体３２に衝突するため、粉
体をより効果的に分散させることができる。When the rectifying body 32 is provided below the first supply cylinder 4 as described above, the powder in the air stream ejected from the injection port 10 of the first supply cylinder 4 collides with the rectifier 32. The powder can be dispersed more effectively.
【００３３】また、噴射口１０から噴出する気流は、整
流体３２の凹曲面３３に沿って流れるため、第１供給筒
４の下部外周に沿う付着流が安定化し、分級効果をさら
に向上させることができる。Further, since the air flow ejected from the injection port 10 flows along the concave curved surface 33 of the straightening member 32, the adhering flow along the outer periphery of the lower portion of the first supply cylinder 4 is stabilized and the classification effect is further improved. You can
【００３４】図１および図７に示す実施例では、第２供
給筒１２にうず巻状の導入路１４を形成して第２供給筒
１２内で粉体を旋回させるようにしているが、図９で
は、導入路１４を省略し、第２供給筒１２の内径を軸方
向の全長にわたって同一径として粉体を第２供給筒１２
内で直線的に流動させて第１供給筒４の円錐路９に流入
させるようにしており、粉体の流動性、凝集性等の違い
に応じて第２供給筒１２は他の適切な形状をとることも
できる。In the embodiment shown in FIGS. 1 and 7, the spiral feed path 14 is formed in the second supply cylinder 12 to swirl the powder in the second supply cylinder 12. In FIG. 9, the introduction passage 14 is omitted, and the inner diameter of the second supply cylinder 12 is made the same throughout the entire axial length, and the powder is supplied to the second supply cylinder 12.
The first supply cylinder 4 is made to flow linearly within the conical passage 9 of the first supply cylinder 4, and the second supply cylinder 12 has another suitable shape depending on the difference in fluidity and cohesiveness of the powder. Can also be taken.
【００３５】なお、粉体は第２供給筒１２に加圧供給し
てもよい。The powder may be pressure-supplied to the second supply cylinder 12.
【００３６】[0036]
【発明の効果】以上のように、この発明に係る分級装置
においては、第２供給筒から第１供給筒内に粉体を供給
して第１供給筒内で旋回する気流と合流させ、その合流
された混合流体を第１供給筒の噴射口において音速まで
加速し、その噴出路から回収室内に流出させて急激に膨
張させるようにしたので、気流と共に回収室内に供給さ
れる粉体をきわめて効果的に分散させることができ、凝
集性の高い粉体でもきわめて効果的に連続して精度よく
分級することができる。As described above, in the classifying device according to the present invention, the powder is supplied from the second supply cylinder into the first supply cylinder and merged with the swirling airflow in the first supply cylinder, Since the combined mixed fluid is accelerated to the sonic velocity at the injection port of the first supply cylinder and is made to flow out from the ejection passage into the recovery chamber to be rapidly expanded, the powder supplied to the recovery chamber together with the air flow is extremely reduced. It can be effectively dispersed, and even highly cohesive powder can be classified very effectively and continuously.
【００３７】また、第１供給筒の下端と所要の間隔をお
いて凹曲面を有する整流体を設けたことにより、その整
流体に対する粉体の衝突によって粉体をきわめて効果的
に分散させることができると共に、第１供給筒から噴出
する混合流体は整流体の凹曲面に沿って流れるため、第
１供給筒の下部外周に沿って流れる付着流の安定化を図
ることができ、分級効率の向上を図ることができる。Further, since the rectifying body having the concave curved surface is provided at a required distance from the lower end of the first supply cylinder, the powder can be extremely effectively dispersed by the collision of the powder with the rectifying body. At the same time, since the mixed fluid ejected from the first supply cylinder flows along the concave curved surface of the rectifying body, it is possible to stabilize the adhered flow that flows along the outer periphery of the lower portion of the first supply cylinder, and improve the classification efficiency. Can be achieved.
【図１】この発明に係る分級装置の一実施例を示す縦断
正面図FIG. 1 is a vertical sectional front view showing an embodiment of a classification device according to the present invention.
【図２】図１のII−II線に沿った断面図FIG. 2 is a sectional view taken along line II-II in FIG.
【図３】図１のIII −III 線に沿った断面図FIG. 3 is a sectional view taken along line III-III in FIG.
【図４】同上分級装置の使用の一例を示す概略図FIG. 4 is a schematic diagram showing an example of using the same classifying device as above.
【図５】同上分級装置の他の実施例を示す断面図FIG. 5 is a sectional view showing another embodiment of the same classifying device as above.
【図６】（イ）、（ロ）、（ハ）は同上第１供給筒の他
の例を示す断面図6 (a), (b), and (c) are sectional views showing another example of the first supply cylinder.
【図７】同上分級装置のさらに他の実施例を示す一部切
欠正面図FIG. 7 is a partially cutaway front view showing still another embodiment of the same classifying device.
【図８】同上の一部を拡大して示す断面図FIG. 8 is an enlarged sectional view showing a part of the above.
【図９】同上の第２供給筒の他の例を示す断面図FIG. 9 is a cross-sectional view showing another example of the second supply cylinder of the above.
１ ケーシング ２ 端壁 ４ 第１供給筒 ５、５ａ、５ｂ 曲面 ６ 凹曲面 ７ 吸引孔 ８ 円筒路 ９ 円錐路 １０ 噴射口 １１ 第１導入路 １２ 第２供給筒 １４ 第２導入路 １５ 分級板 １６ 内周縁 １７ 隙間 １８ 粗粉回収室 １９ 微粉回収室 ３２ 整流体 ３３ 凹曲面 DESCRIPTION OF SYMBOLS 1 Casing 2 End wall 4 First supply cylinder 5, 5a, 5b Curved surface 6 Concave curved surface 7 Suction hole 8 Cylindrical path 9 Conical path 10 Injection port 11 First introduction path 12 Second supply tube 14 Second introduction path 15 Classification plate 16 Inner peripheral edge 17 Gap 18 Coarse powder recovery chamber 19 Fine powder recovery chamber 32 Rectifier 33 Concave curved surface
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭61−57279（ＪＰ，Ａ) 特開 平１−207177（ＪＰ，Ａ) 特公 平４−77632（ＪＰ，Ｂ２) 特公 平４−77633（ＪＰ，Ｂ２) 特公 平４−77634（ＪＰ，Ｂ２) 特公 平４−77635（ＪＰ，Ｂ２) 特公 平３−34990（ＪＰ，Ｂ２) ─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-61-57279 (JP, A) JP-A-1-207177 (JP, A) JP-B 4-77632 (JP, B2) JP-B 4- 77633 (JP, B2) JP 4-77634 (JP, B2) JP 4-77635 (JP, B2) JP 3-34990 (JP, B2)
Claims (4)
端に有する加圧気流供給用の第１供給筒４を設け、その
第１供給筒４の上部閉塞端を貫通し、下端の出口が上記
噴射口１０と同軸上で対向する粉体供給用の第２供給筒
１２を設け、この第２供給筒１２の外周面と第１供給筒
４の内周面間に円筒路８と、この円筒路８の下端から噴
射口１０に向けて径が次第に小さくなる円錐路９とを形
成し、前記第１供給筒４の上端部に上記円筒路８内に加
圧気流を旋回流入させる第１導入路１１を形成し、第１
供給筒４の下面外周部に曲面５を設け、前記ケーシング
１内には、そのケーシング１内の上下方向に複数の回収
室１８、１９を形成する環状の分級板１５を取付け、そ
の分級板１５の内周縁と前記第１供給筒４の曲面５間に
環状の隙間１７を形成した分級装置。1. A first supply cylinder (4) for supplying a pressurized air current having an injection port (10) at a lower end is provided in an upper part of a casing (1), penetrates an upper closed end of the first supply cylinder (4), and an outlet at a lower end is provided. A second supply cylinder 12 for supplying powder which is coaxially opposed to the injection port 10 is provided, and a cylindrical passage 8 is provided between the outer peripheral surface of the second supply cylinder 12 and the inner peripheral surface of the first supply cylinder 4. A conical passage 9 having a diameter gradually decreasing from the lower end of the cylindrical passage 8 toward the injection port 10 is formed, and a pressurized air flow is swirled into the cylindrical passage 8 at the upper end of the first supply cylinder 4. Forming the introduction passage 11, and the first
A curved surface 5 is provided on the outer peripheral portion of the lower surface of the supply cylinder 4, and an annular classification plate 15 that forms a plurality of recovery chambers 18 and 19 in the vertical direction inside the casing 1 is attached to the inside of the casing 1. A classifying device in which an annular gap 17 is formed between the inner peripheral edge and the curved surface 5 of the first supply cylinder 4.
流入させる第２導入路１４を設けた請求項１に記載の分
級装置。2. The classification device according to claim 1, wherein a second introduction passage 14 for swirling and injecting the powder is provided above the second supply cylinder 12.
長にわたって同一径とした請求項１に記載の分級装置。3. The classification device according to claim 1, wherein the inner diameter of the second supply cylinder 12 is the same throughout the entire axial length.
体３２を設け、その整流体３２に前記噴射口１０から噴
出する粉体と加圧気流の混合流体を第１供給筒４の曲面
５に向け誘導する凹曲面３３を設けた請求項１乃至３の
いずれか１つに記載の分級装置。4. A rectifying body 32 is provided below the injection port 10 of the first supply cylinder 4, and a mixed fluid of powder and a pressurized air stream ejected from the injection port 10 is supplied to the rectification body 32. The classification device according to any one of claims 1 to 3, wherein a concave curved surface 33 that guides the curved surface 5 toward the curved surface 5 is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5156993A JPH07102346B2 (en) | 1992-06-29 | 1993-06-28 | Classifier |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17051592 | 1992-06-29 | ||
| JP4-170515 | 1992-06-29 | ||
| JP5156993A JPH07102346B2 (en) | 1992-06-29 | 1993-06-28 | Classifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0691229A JPH0691229A (en) | 1994-04-05 |
| JPH07102346B2 true JPH07102346B2 (en) | 1995-11-08 |
Family
ID=26484587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5156993A Expired - Fee Related JPH07102346B2 (en) | 1992-06-29 | 1993-06-28 | Classifier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07102346B2 (en) |
-
1993
- 1993-06-28 JP JP5156993A patent/JPH07102346B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0691229A (en) | 1994-04-05 |
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| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19960514 |