JPH0857424A - Raw material supply device in air classifier - Google Patents
Raw material supply device in air classifierInfo
- Publication number
- JPH0857424A JPH0857424A JP21571395A JP21571395A JPH0857424A JP H0857424 A JPH0857424 A JP H0857424A JP 21571395 A JP21571395 A JP 21571395A JP 21571395 A JP21571395 A JP 21571395A JP H0857424 A JPH0857424 A JP H0857424A
- Authority
- JP
- Japan
- Prior art keywords
- raw material
- material supply
- supply cylinder
- powder
- cylinder
- 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
Links
Abstract
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】この発明は、粉体原料を高速
度で旋回して微粉と粗粉に遠心分離する気流分級機の原
料供給装置に関するものである。
【０００２】
【従来の技術およびその問題点】図３に示すように、本
体ケーシング２０の内部に分級室２１を形成し、その分
級室２１内に供給した粉体原料を高速旋回させて粗粉に
微粉とに遠心分離し、分級室２１の外周部に移行する粗
粉を、分級室２１の底部に設けた分級板２２の外周の粗
粉排出口２３から本体ケーシング２０の下部に排出し、
分級室２１の中央部に移行する微粉を上記分級板２２の
中央部に接続した微粉排出パイプ２４から流出させるよ
うにした気流分級機は従来から存在する。
【０００３】上記気流分級機の分級室に対する原料供給
装置の従来技術として、図３に示すように、分級室２１
の上部に原料供給筒２５を接続し、その原料供給筒２５
の外周上部に接続した原料流出筒２６から原料供給筒２
５内に原料を噴射して高速度で旋回させ、原料供給筒２
５の内径面に沿って下方向に移動する原料をその原料供
給筒２５内の下部外周囲に形成した供給孔２７から分級
室２１に流入させるようにしたものである。
【０００４】ところで、上記供給装置においては、原料
供給筒２５に粉体原料を供給して旋回させると、原料供
給筒２５内に自由渦が形成され、原料供給筒２５内の外
周部における粉体粒子の旋回速度が遅くなるため、原料
供給筒２５内の下部において粉体原料が凝集し易く、偏
析した状態で分級室２１に流入することが多い。このた
め、分級精度が悪く、処理能力も低いという不都合があ
る。
【０００５】また、付着性の強い原料の場合には、原料
供給筒２５内の下部において付着し、連続運転すること
ができないという不都合もある。
【０００６】
【発明の課題】この発明の課題は、上記の不都合を解消
し、分級室に粉体原料を分散供給することができるよう
にして分級精度および処理能力の向上を図り、付着性の
強い原料でも、連続的に分級処理することができるよう
にした原料供給装置を提供することである。
【０００７】
【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、分級室の上部に設けた原料
供給筒の外周囲に原料の旋回方向に傾斜する複数の案内
羽根を環状に配置し、隣接する案内羽根間に原料供給筒
の内部と外部を連通させる二次空気流入路を設けた構成
としたのである。
【０００８】
【作用】上記のように構成すれば、原料供給筒内に原料
を供給して旋回させると、案内羽根間の二次空気流入路
から原料供給筒の内部に二次空気が導入される。その二
次空気によって原料に分散力を付与することができると
共に、原料供給筒の内部に半自由渦を形成することがで
きるため、分級室に粉体原料を高速度で分散供給するこ
とができる。また、付着性の強い粉体原料の場合でも、
原料供給筒の内径面に付着させることなく分級室に供給
することができ、連続的に分級処理することができる。
【０００９】
【発明の実施の形態】以下、この発明の実施の形態を図
１及び図２に基づいて説明する。
【００１０】図示のように、本体ケーシング１には上部
ケーシング２と下部ケーシング３を備え、その上部ケー
シング２の内側に配置した傘状の分級カバー４の外周囲
に原料供給孔５を設けてある。
【００１１】また、分級カバー４の下方に傘状の分級板
６を設けて分級カバー４との間に分級室７を形成し、そ
の分級板６の外周囲に粗粉排出孔８を設け、さらに分級
板６の中央部に微粉排出筒９を接続してある。
【００１２】上記分級室７のまわりには、上記ケーシン
グ２と下部ケーシング３との間に複数の案内羽根１０が
等間隔に環状に配置されている。この案内羽根１０は、
分級室７内において旋回する原料の旋回方向に傾斜し、
隣接する案内羽根１０間に形成された二次空気流入路１
１によって外部と分級室７内が連通されている。
【００１３】前記上記ケーシング２の上部には原料供給
筒１２が接続され、その原料供給筒１２の上部端板１３
の中心部に排気筒１４を接続してある。
【００１４】原料供給筒１２は、上下に分割され、その
分割面に複数の案内羽根１５を等間隔に環状に配置して
ある。案内羽根１５は、原料供給筒１２内において旋回
する原料の旋回方向に傾斜し、隣接する案内羽根１５間
の二次空気流入路１６によって外部と原料供給筒１２の
内部が連通されている。
【００１５】また、原料供給筒１２の分割面間にはエア
噴射ノズル１７を、上記案内羽根１５と同方向に傾斜さ
せて設け、そのエア噴射ノズル１７の内部に原料ホッパ
１８の下部出口を接続してある。このため、エア噴射ノ
ズル１７に高圧エアを供給すると、ノズル１７内を流動
する高圧エアによって原料ホッパ１８の内部の原料がノ
ズル１７の内部に吸引され、ノズル１７の先端から原料
供給筒１２の内部に噴射される。
【００１６】実施の形態で示す気流分級機の原料供給装
置は上記の構造から成り、粉体原料の分級に際しては、
微粉排出筒９および排出筒１４に吸引力を付与し、その
状態において、エア噴射ノズル１７から原料供給筒１２
の内部に粉体原料を供給する。
【００１７】いま、エア噴射ノズル１７に高圧エアを供
給して原料供給筒１２内に粉体原料を供給すると、上記
粉体原料は、原料供給筒１２の内部外周を旋回しながら
下降し、ガスは排出筒１４から排出される。このとき、
外部の空気は、案内羽根１５間の二次空気流入路１６か
ら原料供給筒１２の内部に流入するため、その二次空気
によって原料供給筒１２内の粉体原料は分散される。ま
た、二次空気は、原料供給筒１２の周方向全体から均等
に流入するため、原料供給筒１２の内部において半自由
渦が形成される。このため、原料は分散状態において高
速度で旋回しながら下降し、分級カバー４の外周の粉体
供給孔５から分級室７内に流入する。
【００１８】上記の原料は、分級室７内において旋回
し、このとき、分級室７のまわりの二次空気流入路１１
から外部のエアが分級室７内に流入するため、分級室７
内に半自由渦が形成され、その半自由渦の形成により原
料は高速旋回して粗粉と微粉とに遠心分離され、粗粉は
粗粉排出孔８から下部ケーシング３の下部に流入し、微
粉は微粉排出筒９から取り出される。
【００１９】
【発明の効果】以上のように、この発明は、原料供給筒
のまわりに複数の案内羽根を環状に配置し、隣接する案
内羽根間の二次空気流入路から外部のエアを原料供給筒
内に導くようにしたので、原料供給筒内に供給されて旋
回流動する粉体原料を効果的に分散させることができる
と共に、原料供給筒内に形成される半自由渦によって粉
体原料の旋回速度を高めることができる。
【００２０】このため、原料を分級室に偏析することな
く均等に導入することができ、分級精度および処理能力
の向上を図ることができる。
【００２１】また、付着性の強い原料でも分級室にスム
ーズに流入させることができ、連続運転が可能である。
【００２２】さらに、二次空気の流入により、原料の旋
回速度を高くすることができるため、分級点を微粉側に
設定することができる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a raw material supply device for an air flow classifier which swirls powder raw material at high speed to centrifuge it into fine powder and coarse powder. . 2. Description of the Related Art As shown in FIG. 3, a classification chamber 21 is formed inside a main body casing 20, and the powder raw material fed into the classification chamber 21 is swirled at high speed to produce coarse powder. The coarse powder, which is centrifugally separated into fine powder and is transferred to the outer peripheral portion of the classification chamber 21, is discharged to the lower portion of the main body casing 20 from the coarse powder outlet 23 on the outer periphery of the classification plate 22 provided at the bottom of the classification chamber 21,
Conventionally, there has been an airflow classifier that allows fine powder that moves to the central portion of the classification chamber 21 to flow out from a fine powder discharge pipe 24 connected to the central portion of the classification plate 22. As a prior art of a raw material supply device for the classification chamber of the above airflow classifier, as shown in FIG.
The raw material supply cylinder 25 is connected to the upper part of the
From the raw material outflow cylinder 26 connected to the upper part of the outer periphery of the raw material supply cylinder 2
Inject the raw material into 5 and swirl it at high speed to feed the raw material 2
The raw material that moves downward along the inner diameter surface of No. 5 is made to flow into the classification chamber 21 through the supply hole 27 formed in the outer periphery of the lower portion of the raw material supply cylinder 25. By the way, in the above-mentioned supply device, when the powder raw material is supplied to the raw material supply cylinder 25 and swirled, a free vortex is formed in the raw material supply cylinder 25, and the powder in the outer peripheral portion of the raw material supply cylinder 25 is formed. Since the swirling speed of the particles becomes slow, the powder raw material is likely to agglomerate in the lower portion of the raw material supply cylinder 25 and often flows into the classification chamber 21 in a segregated state. Therefore, there are disadvantages that the classification accuracy is poor and the processing capacity is low. Further, in the case of a strongly adherent raw material, there is a disadvantage that the raw material is adhered to the lower portion of the raw material supply cylinder 25 and continuous operation cannot be performed. SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned inconvenience and to enable the powder raw material to be distributed and supplied to the classification chamber to improve the classification accuracy and the processing capacity and to improve the adhesion. An object of the present invention is to provide a raw material supply device capable of continuously classifying even a strong raw material. In order to solve the above-mentioned problems, in the present invention, a plurality of guides inclined in the swirling direction of the raw material are provided around the outer periphery of the raw material supply cylinder provided in the upper part of the classification chamber. The blades are arranged in an annular shape, and a secondary air inflow path that connects the inside and the outside of the raw material supply cylinder is provided between adjacent guide blades. With the above arrangement, when the raw material is supplied into the raw material supply cylinder and swirled, the secondary air is introduced into the raw material supply cylinder from the secondary air inflow passage between the guide vanes. It The secondary air can give a dispersive force to the raw material and can form a semi-free vortex inside the raw material supply cylinder, so that the powder raw material can be dispersed and supplied at a high speed to the classification chamber. . In addition, even in the case of powder materials with strong adhesion,
The raw material can be supplied to the classification chamber without being attached to the inner diameter surface of the supply cylinder, and continuous classification processing can be performed. BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS. 1 and 2. As shown in the figure, the main body casing 1 is provided with an upper casing 2 and a lower casing 3, and a raw material supply hole 5 is provided on the outer periphery of an umbrella-shaped classification cover 4 arranged inside the upper casing 2. . Further, an umbrella-shaped classifying plate 6 is provided below the classifying cover 4 to form a classifying chamber 7 between the classifying cover 4 and a coarse powder discharge hole 8 provided around the outer circumference of the classifying plate 6. Further, a fine powder discharge tube 9 is connected to the center of the classifying plate 6. Around the classification chamber 7, a plurality of guide blades 10 are annularly arranged at equal intervals between the casing 2 and the lower casing 3. This guide vane 10
Inclined in the swirling direction of the swirling raw material in the classifying chamber 7,
Secondary air inflow passage 1 formed between adjacent guide vanes 10
The outside is connected to the inside of the classification chamber 7 by 1. A raw material supply cylinder 12 is connected to the upper part of the casing 2, and an upper end plate 13 of the raw material supply cylinder 12 is connected.
An exhaust pipe 14 is connected to the center of the. The raw material supply cylinder 12 is divided into upper and lower parts, and a plurality of guide vanes 15 are annularly arranged at equal intervals on the divided surface. The guide vanes 15 are inclined in the swirling direction of the raw material swirling in the raw material supply cylinder 12, and the outside and the inside of the raw material supply cylinder 12 are communicated by the secondary air inflow passages 16 between the adjacent guide vanes 15. Further, an air injection nozzle 17 is provided between the divided surfaces of the raw material supply cylinder 12 so as to be inclined in the same direction as the guide vanes 15, and the lower outlet of the raw material hopper 18 is connected to the inside of the air injection nozzle 17. I am doing it. Therefore, when high-pressure air is supplied to the air injection nozzle 17, the raw material inside the raw material hopper 18 is sucked into the nozzle 17 by the high-pressure air flowing inside the nozzle 17, and from the tip of the nozzle 17 to the inside of the raw material supply cylinder 12. Is injected into. The raw material supply device of the air stream classifier shown in the embodiment has the above-mentioned structure, and when classifying the powder raw material,
A suction force is applied to the fine powder discharge cylinder 9 and the discharge cylinder 14, and in this state, the air injection nozzle 17 to the raw material supply cylinder 12
The powder raw material is supplied inside. When high pressure air is supplied to the air injection nozzle 17 to supply the powder raw material into the raw material supply cylinder 12, the powder raw material descends while swirling around the inner and outer circumferences of the raw material supply cylinder 12. Is discharged from the discharge tube 14. At this time,
The external air flows into the raw material supply cylinder 12 from the secondary air inflow passage 16 between the guide vanes 15, so that the secondary air disperses the powder raw material in the raw material supply cylinder 12. Further, since the secondary air uniformly flows in from the entire circumferential direction of the raw material supply cylinder 12, a semi-free vortex is formed inside the raw material supply cylinder 12. Therefore, the raw material descends while swirling at a high speed in the dispersed state, and flows into the classification chamber 7 from the powder supply hole 5 on the outer periphery of the classification cover 4. The above raw materials swirl in the classification chamber 7, and at this time, the secondary air inflow passage 11 around the classification chamber 7 is provided.
Since outside air flows into the classification chamber 7 from the
A semi-free vortex is formed inside, and the raw material is swirled at high speed by the formation of the semi-free vortex and is separated into coarse powder and fine powder, and the coarse powder flows into the lower portion of the lower casing 3 from the coarse powder discharge hole 8, The fine powder is taken out from the fine powder discharge cylinder 9. As described above, according to the present invention, a plurality of guide vanes are annularly arranged around the raw material supply cylinder, and the external air is fed from the secondary air inflow passage between the adjacent guide vanes. Since the powder material is introduced into the supply cylinder, the powder material that is supplied into the material supply cylinder and swirling and flowing can be effectively dispersed, and the powder raw material is formed by the semi-free vortex formed in the material supply cylinder. The turning speed can be increased. Therefore, the raw material can be uniformly introduced into the classification chamber without segregation, and the classification accuracy and the processing capacity can be improved. Further, even a highly adherent raw material can be smoothly introduced into the classification chamber, and continuous operation is possible. Furthermore, since the swirling speed of the raw material can be increased by the inflow of the secondary air, the classification point can be set on the fine powder side.
【図面の簡単な説明】
【図１】この発明に係る原料供給装置の実施の形態を示
す縦断正面図
【図２】図１の原料供給筒の横断平面図
【図３】従来の原料供給装置を示す縦断正面図
【符号の説明】
７ 分級室
１２ 原料供給筒
１５ 案内羽根
１６ 二次空気流入路BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a vertical sectional front view showing an embodiment of a raw material supply device according to the present invention. FIG. 2 is a cross-sectional plan view of the raw material supply cylinder of FIG. 1. FIG. 3 is a conventional raw material supply device. Front view showing the [reference numeral] 7 classification chamber 12 raw material supply cylinder 15 guide blade 16 secondary air inflow path
─────────────────────────────────────────────────────
【手続補正書】
【提出日】平成７年９月２５日
【手続補正１】
【補正対象書類名】明細書
【補正対象項目名】全文
【補正方法】変更
【補正内容】
【書類名】 明細書
【発明の名称】 気流分級機における原料供給装置
【特許請求の範囲】
（１）上部が開口する本体ケーシング１内に円錐形の分
級カバー４と、その下方に円錐形の分級板６を設けて両
者間に分級室７を形成し、本体ケーシング１の上部に端
板１３を有する原料供給筒１２を接続し、その原料供給
筒１２の上部から原料供給筒１２内の外周接線方向に向
けて原料を供給し、上記原料供給筒１２内を旋回し乍ら
下降する原料を前記分級カバー４の外周囲に形成された
環状の原料供給孔５から分級室７に旋回流入させて粗粉
と微粉とに遠心分離する気流分級機の原料供給装置にお
いて、前記原料供給筒１２の円周上に原料の旋回方向に
傾斜する複数の案内羽根１５を所要の間隔をおいて設け
て隣接する案内羽根１５間に外部と原料供給筒１２内と
を連通させる二次空気流入路１６を形成したことを特徴
とする気流分級機における原料供給装置。
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】この発明は、粉体原料を高速
度で旋回して微粉と粗粉に遠心分離する気流分級機の原
料供給装置に関するものである。
【０００２】
【従来の技術】本体ケーシング内に分級室を設け、その
分級室内に粉体原料を供給し、その粉体原料を分級室内
で旋回させて粗粉と微粉とに遠心分離する気流分級機は
従来から知られている。
【０００３】上記のような気流分級機の分級室に対する
粉体原料の供給には、特開昭６１−９３８８０号公報、
および実開昭６２−７９５８２号公報に記載されている
ように、分級室内に粉体原料を直接噴射する方法が存在
する。
【０００４】しかし、上記の原料供給方法においては、
分級室の外周一部から粉体原料を供給するため、分級室
における旋回気流に乱れが生じ、分級精度に悪影響をお
よぼすという問題がある。また、分級室の外周一部から
の供給であるため、分級室における原料の分布が不均一
になり易く、効率よく分級することができないという問
題もある。
【０００５】特公昭５６−２０９１３号公報には、本願
の図３に示す原料供給装置が記載されている。この原料
供給装置は、本体ケーシング２０の上部に原料供給筒２
５を接続し、その原料供給筒２５の外周上部に接続した
原料流出筒２６から原料供給筒２５内に原料を供給して
旋回させ、原料供給筒２５の内径面に沿って下方向に移
動する原料をその原料供給筒２５内の下部外周囲に形成
した環状の供給孔２７から分級室２１内に流入させるよ
うにしている。
【０００６】ここで、分級室２１内に供給された原料
は、その分級室２１内で旋回して粗粉と微粉とに遠心分
離され、粗粉は、分級板２２の外周の粗粉排出口２３か
ら排出され、微粉は分級板２２の中央に接続した微粉排
出パイプ２４から排出される。
【０００７】図３に示すように、原料供給筒２５内で原
料を旋回させ乍ら、環状の供給孔２７から分級室２１内
に原料を供給することより、供給原料の旋回流と分級室
２１内における旋回流とが同じ向きであるため、分級室
２１内における旋回流に乱れを生じさせることが殆んど
なく、分級室に原料を直接供給する場合に比較して、原
料を高精度に分級することができるという特徴を有す
る。
【０００８】
【発明が解決しようとする課題】ところで、図３に示す
原料供給装置においては、原料と空気の混合流が原料供
給装置の一箇所から取り入れられる構成であるため、原
料供給筒２５内における原料の旋回速度が遅くなり、原
料供給筒２５内の下部において粉体原料が凝集し易く、
原料供給孔の一部から固まりの状態で分級室２１に流入
することが多い。このため、分級室における分布が不均
一になり、原料を効率よく分級処理することができない
という不都合がある。
【０００９】また、付着性の強い原料の場合には、原料
供給筒２５内の下部において付着し、連続運転すること
ができないという不都合もある。
【００１０】
【発明の課題】この発明の課題は、上記の不都合を解消
し、分級室に粉体原料を原料供給孔の全周から分散供給
することができるようにして分級精度および処理能力の
向上を図り、付着性の強い原料でも、連続的に分級処理
することができるようにした原料供給装置を提供するこ
とである。
【００１１】
【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、上部が開口する本体ケーシ
ング１内に円錐形の分級カバー４と、その下方に円錐形
の分級板６を設けて両者間に分級室７を形成し、本体ケ
ーシング１の上部に端板１３を有する原料供給筒１２を
接続し、その原料供給筒１２の上部から原料供給筒１２
内の外周接線方向に向けて原料を供給し、上記原料供給
筒１２内を旋回し乍ら下降する原料を前記分級カバー４
の外周囲に形成された環状の原料供給孔５から分級室７
に旋回流入させて粗粉と微粉とに遠心分離する気流分級
機の原料供給装置において、前記原料供給筒１２の円周
上に原料の旋回方向に傾斜する複数の案内羽根１５を所
要の間隔をおいて設けて隣接する案内羽根１５間に外部
と原料供給筒１２内とを連通させる二次空気流入路１６
を形成した構成を採用している。
【００１２】
【作用】上記のように構成を採用したことにより、原料
を原料供給筒１２内に供給して旋回させると、案内羽根
１５間の二次空気流入路１６から原料供給筒１２内に二
次空気が導入され、その二次空気によって原料の旋回速
度を高めることができる。このため、原料が原料供給筒
１２内の下部において凝集するのを防止することができ
ると共に、原料の旋回流の傾むきが小さく、原料を環状
の原料供給孔５の全体から分級室７内に均一に分散供給
することができる。さらに、二次空気の導入によって原
料の旋回速度が上がるので、原料供給筒で供給時に凝集
していた原料が分散されて、分散状態のままで原料供給
孔に供給することができる。
【００１３】
【発明の実施の形態】以下、この発明の実施の形態を図
１及び図２に基づいて説明する。
【００１４】図示のように本体ケーシング１は、上部ケ
ーシング２と下部ケーシング３とから成り、上部ケーシ
ング２の内側には円錐形の分級カバー４が設けられ、そ
の分級カバー４の外周と上部ケーシング２の内周間に環
状の原料供給孔５が形成されている。
【００１５】また、分級カバー４の下方には、その分級
カバー４との間に分級室７を形成する円錐形の分級板６
が設けられ、この分級板６の外縁部とケーシング１の内
周間に環状の粗粉排出孔８が設けられている。
【００１６】分級板６の中央部には微粉排出筒９が接続
されている。微粉排出筒９はＬ形をなし、その端部は下
部ケーシング３を貫通して外部に臨んでいる。
【００１７】上部ケーシング２と下部ケーシング３との
間に複数の案内羽根１０が等間隔に環状に配置されてい
る。この案内羽根１０は、分級室７内において旋回する
原料の旋回方向に傾斜し、隣接する案内羽根１０間に形
成された二次空気流入路１１によって外部と分級室７内
が連通されている。
【００１８】前記上部ケーシング２の上部には原料供給
筒１２が接続され、その原料供給筒１２の上部端板１３
の中心部に排気筒１４が接続されている。
【００１９】原料供給筒１２は、上下に分割され、その
分割面間に複数の案内羽根１５が等間隔に環状に配置さ
れている。案内羽根１５は、原料供給筒１２内において
旋回する原料の旋回方向に傾斜し、隣接する案内羽根１
５間の二次空気流入路１６によって外部と原料供給筒１
２の内部が連通されている。
【００２０】二次空気流入路１６には、原料供給筒１２
の内部接線方向に向けて高圧エアを噴射するエア噴射ノ
ズル１７の先端部が挿入されている。このエア噴射ノズ
ル１７内のエア通路に原料ホッパ１８の下部出口が接続
され、エア噴射ノズル１７に高圧エアを供給すると、ノ
ズル１７内を流動する高圧エアによって原料ホッパ１８
の内部の原料がノズル１７の内部に吸引され、ノズル１
７の先端から原料供給筒１２の内部に噴射される。
【００２１】実施の形態で示す気流分級機の原料供給装
置は上記の構造から成り、粉体原料の分級に際しては、
微粉排出筒９および排気筒１４に吸引力を付与し、その
状態において、エア噴射ノズル１７から原料供給筒１２
の内部に粉体原料を供給する。
【００２２】いま、エア噴射ノズル１７に高圧エアを供
給して原料供給筒１２内に粉体原料を供給すると、上記
粉体原料は、原料供給筒１２の内部外周を旋回しながら
下降し、ガスの一部は排気筒１４から排出される。この
とき、外部の空気は、原料供給筒１２の円周上に並ぶ複
数の案内羽根１５間の各二次空気流入路１６から原料供
給筒１２の内部に流入するため、その二次空気によって
原料の旋回速度は高められると共に分散される。
【００２３】このため、原料は分散状態で原料供給筒１
２の内部を高速度で旋回し乍ら下降すると共に、その旋
回流の傾きは小さく、分級カバー４の外周に設けられた
粉体供給孔５の全体から均等に分級室７内に流入する。
【００２４】上記の原料は、分級室７内において旋回
し、このとき、分級室７のまわりの二次空気流入路１１
から外部のエアが分級室７内に流入するため、原料は高
速旋回して粗粉と微粉とに遠心分離され、粗粉は粗粉排
出孔８から下部ケーシング３に排出され、微粉は微粉排
出筒９から取り出される。
【００２５】
【発明の効果】以上のように、この発明は、原料供給筒
の円周上に複数の案内羽根を設け、隣接する案内羽根間
の二次空気流入路から外部のエアを原料供給筒内に導く
ようにしたので、原料供給筒内に供給された原料の旋回
速度を高めることができ、原料を十分に分散させること
ができると共に、原料供給筒内の下部において原料が凝
集するのを防止することができる。また、原料の旋回速
度の高速化に伴って旋回流の傾きが小さくなり、その結
果、分散状態の原料を原料供給孔の全体から分級室内に
均等に導入することができ、分級精度および処理能力の
向上を図ることができる。
【００２６】また、付着性の強い原料でも分級室にスム
ーズに流入させることができ、連続運転が可能である。
【００２７】さらに、二次空気の流入により、原料の旋
回速度を高くすることができるため、分級点を微粉側に
設定することができる。
【図面の簡単な説明】
【図１】この発明に係る原料供給装置の実施の形態を示
す縦断正面図
【図２】図１の原料供給筒の横断平面図
【図３】従来の原料供給装置を示す縦断正面図
【符号の説明】
１ 本体ケーシング
４ 分級カバー
５ 原料供給孔
６ 分級板
７ 分級室
１２ 原料供給筒
１３ 端板
１５ 案内羽根
１６ 二次空気流入路─────────────────────────────────────────────────── ───
[Procedure Amendment] [Submission Date] September 25, 1995 [Procedure Amendment 1] [Amendment Document Name] Specification [Amendment Item Name] Full Text [Amendment Method] Change [Amendment Content] [Document Name] Specification Document [Title of Invention] Raw material supply device in air flow classifier [Claims] (1) Conical portion in main body casing 1 with upper opening
Both the class cover 4 and the conical classifying plate 6 below it are installed.
A classification chamber 7 is formed between the operators, and an
The raw material supply cylinder 12 having the plate 13 is connected to supply the raw material.
From the upper part of the cylinder 12 to the outer circumference tangential direction in the raw material supply cylinder 12
Supply the raw material, and swirl in the raw material supply cylinder 12.
The descending raw material was formed on the outer periphery of the classification cover 4.
Swirling into the classification chamber 7 from the ring-shaped raw material supply hole 5 to produce coarse powder.
In the raw material supply device of the air flow classifier that centrifuges into fine powder
The raw material supply cylinder 12 on the circumference of the raw material in the turning direction.
Providing a plurality of slanting guide vanes 15 at required intervals
Between the adjacent guide vanes 15 and the inside of the raw material supply cylinder 12
A raw material supply device for an air flow classifier , characterized in that a secondary air inflow passage 16 for communicating with each other is formed . Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a raw material supply device for an air flow classifier which swirls powder raw material at high speed to centrifuge it into fine powder and coarse powder. . A classifying chamber is provided in a main body casing, a powder raw material is supplied into the classifying chamber, and the powder raw material is swirled in the classifying chamber to centrifugally separate it into coarse powder and fine powder. Machines have been known for a long time. To supply the powder raw material to the classification chamber of the above-mentioned air stream classifier, Japanese Patent Laid-Open No. 61-93880 has been proposed.
Also, as described in Japanese Utility Model Laid-Open No. 62-79582, there is a method of directly injecting a powder raw material into a classification chamber. However, in the above raw material supply method,
Since the powder raw material is supplied from a part of the outer periphery of the classification chamber, the swirling airflow in the classification chamber is disturbed, which adversely affects the classification accuracy. Further, since the supply is performed from a part of the outer circumference of the classification chamber, there is a problem that the distribution of the raw material in the classification chamber is likely to be non-uniform and efficient classification cannot be performed. Japanese Patent Publication No. 56-20913 discloses a raw material supply device shown in FIG. 3 of the present application. This raw material supply device is provided with a raw material supply cylinder 2 on an upper part of a main body casing 20.
5, the raw material is supplied from the raw material outflow tube 26 connected to the upper part of the outer circumference of the raw material supply tube 25 into the raw material supply tube 25 to swirl, and moves downward along the inner diameter surface of the raw material supply tube 25. The raw material is made to flow into the classification chamber 21 through an annular supply hole 27 formed on the outer periphery of the lower portion of the raw material supply cylinder 25. The raw material supplied into the classifying chamber 21 is swirled in the classifying chamber 21 and centrifugally separated into coarse powder and fine powder, and the coarse powder is discharged from the coarse powder outlet on the outer periphery of the classifying plate 22. The fine powder is discharged from the fine powder discharge pipe 23 connected to the center of the classifying plate 22. As shown in FIG. 3, by swirling the raw material in the raw material supply cylinder 25 and supplying the raw material from the annular supply hole 27 into the classifying chamber 21, the swirling flow of the supply raw material and the classifying chamber 21. Since the swirling flow in the inside has the same direction, the swirling flow in the classifying chamber 21 hardly causes turbulence, and the raw material can be highly accurately compared with the case where the raw material is directly supplied to the classifying chamber. It has the feature that it can be classified. By the way, in the raw material supply apparatus shown in FIG. 3, since the mixed flow of the raw material and air is taken in from one place of the raw material supply apparatus, the inside of the raw material supply cylinder 25 is improved. In the raw material supply cylinder 25, the swirling speed of the raw material becomes slow, and the powder raw material easily aggregates in the lower part of the raw material supply cylinder 25.
It often flows into the classification chamber 21 in a solid state from a part of the raw material supply hole. For this reason, the distribution in the classification chamber becomes non-uniform, and the raw material cannot be efficiently classified. Further, in the case of a strongly adherent raw material, there is also a disadvantage that the raw material is adhered to the lower portion of the raw material supply cylinder 25 and continuous operation cannot be performed. An object of the present invention is to solve the above-mentioned inconvenience and to make it possible to disperse and supply the powdery raw material into the classification chamber from the entire circumference of the raw material supply hole to improve the classification accuracy and the processing capacity. It is an object of the present invention to provide a raw material supply device which is capable of continuously classifying even a raw material having strong adhesion. In order to solve the above-mentioned problems, in the present invention, a conical classification cover 4 is provided in a main body casing 1 having an upper opening, and a conical classification cover is provided below it. A plate 6 is provided to form a classification chamber 7 therebetween, and a raw material supply cylinder 12 having an end plate 13 is connected to the upper part of the main body casing 1 and the raw material supply cylinder 12 is provided from the upper part of the raw material supply cylinder 12.
The raw material is supplied in the tangential direction of the outer periphery of the inside, and the raw material is swirled in the raw material supply cylinder 12 and descended.
From the ring-shaped raw material supply hole 5 formed on the outer periphery of the
In the raw material supply device of the air flow classifier that swirls and flows into the raw material and centrifugally separates into coarse powder and fine powder, a plurality of guide blades 15 inclined in the swirling direction of the raw material are provided on the circumference of the raw material supply cylinder 12 at required intervals. A secondary air inflow passage 16 for communicating the outside with the inside of the raw material supply cylinder 12 between the adjacent guide vanes 15 provided in advance.
Is adopted. By adopting the above-described structure, when the raw material is supplied into the raw material supply tube 12 and swirled, the raw material is supplied from the secondary air inflow passage 16 between the guide vanes 15 into the raw material supply tube 12. Secondary air is introduced, and the swirling speed of the raw material can be increased by the secondary air. For this reason, it is possible to prevent the raw material from aggregating in the lower part of the raw material supply cylinder 12, the tilt of the swirling flow of the raw material is small, and the raw material is fed from the entire annular raw material supply hole 5 into the classification chamber 7. It can be uniformly dispersed and supplied. Furthermore, since the swirling speed of the raw material is increased by the introduction of the secondary air, the raw material that has been aggregated at the time of supply in the raw material supply cylinder is dispersed and can be supplied to the raw material supply hole in the dispersed state. BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS. 1 and 2. As shown in the figure, the main casing 1 is composed of an upper casing 2 and a lower casing 3. A conical classification cover 4 is provided inside the upper casing 2, and the outer periphery of the classification cover 4 and the upper casing 2 are provided. An annular material supply hole 5 is formed between the inner circumferences of the. Below the classifying cover 4, a conical classifying plate 6 which forms a classifying chamber 7 with the classifying cover 4 is formed.
An annular coarse powder discharge hole 8 is provided between the outer edge of the classifying plate 6 and the inner circumference of the casing 1. A fine powder discharge tube 9 is connected to the center of the classifying plate 6. The fine powder discharge cylinder 9 has an L shape, and its end portion penetrates the lower casing 3 and faces the outside. A plurality of guide vanes 10 are annularly arranged at equal intervals between the upper casing 2 and the lower casing 3. The guide vanes 10 are inclined in the swirling direction of the raw material swirling in the classifying chamber 7, and the outside and the inside of the classifying chamber 7 are communicated with each other by the secondary air inflow passages 11 formed between the adjacent guide vanes 10. A raw material supply cylinder 12 is connected to the upper part of the upper casing 2, and an upper end plate 13 of the raw material supply cylinder 12 is connected.
An exhaust pipe 14 is connected to the central portion of the. The raw material supply cylinder 12 is divided into upper and lower parts, and a plurality of guide blades 15 are annularly arranged at equal intervals between the divided surfaces. The guide vanes 15 are inclined in the swirling direction of the raw material swirling in the raw material supply cylinder 12 and are adjacent to each other.
The secondary air inflow passage 16 between the outside and the raw material supply cylinder 1
The inside of 2 is connected. A raw material supply cylinder 12 is provided in the secondary air inflow passage 16.
The tip of an air injection nozzle 17 for injecting high-pressure air toward the inner tangential direction is inserted. The lower outlet of the raw material hopper 18 is connected to the air passage in the air injection nozzle 17, and when high pressure air is supplied to the air injection nozzle 17, the high pressure air flowing in the nozzle 17 causes the raw material hopper 18 to flow.
The raw material inside is sucked into the inside of the nozzle 17,
It is injected from the tip of 7 into the raw material supply cylinder 12. The raw material supply device of the air stream classifier shown in the embodiment has the above-mentioned structure, and when classifying the powder raw material,
A suction force is applied to the fine powder discharge cylinder 9 and the exhaust cylinder 14, and in that state, the air injection nozzle 17 to the raw material supply cylinder 12
The powder raw material is supplied inside. Now, when high-pressure air is supplied to the air injection nozzle 17 to supply the powder raw material into the raw material supply cylinder 12, the powder raw material descends while swirling around the inner and outer circumferences of the raw material supply cylinder 12. Is partially discharged from the exhaust stack 14. At this time, the outside air flows into the inside of the raw material supply cylinder 12 from each secondary air inflow passage 16 between the plurality of guide vanes 15 arranged on the circumference of the raw material supply cylinder 12, so that the secondary air causes the raw material to flow. The swirling speed is increased and dispersed. Therefore, the raw material is in a dispersed state and the raw material supply cylinder 1
While swirling at a high speed in the inside of 2 and descending, the inclination of the swirling flow is small, and the powder flows uniformly into the classifying chamber 7 from all of the powder supply holes 5 provided on the outer periphery of the classifying cover 4. The above raw material swirls in the classification chamber 7, and at this time, the secondary air inflow path 11 around the classification chamber 7
Since the outside air flows into the classifying chamber 7 from the above, the raw material is swirled at high speed and centrifugally separated into coarse powder and fine powder, the coarse powder is discharged from the coarse powder discharge hole 8 to the lower casing 3, and the fine powder is discharged. It is taken out of the cylinder 9. As described above, according to the present invention, a plurality of guide blades are provided on the circumference of the raw material supply cylinder, and external air is supplied from the secondary air inflow path between the adjacent guide blades. Since it is introduced into the cylinder, the swirling speed of the raw material supplied into the raw material supply cylinder can be increased, the raw material can be sufficiently dispersed, and the raw material is agglomerated in the lower part of the raw material supply cylinder. Can be prevented. Further, the inclination of the swirling flow becomes smaller as the swirling speed of the raw material becomes faster, and as a result, the raw material in a dispersed state can be uniformly introduced into the classifying chamber from all the raw material supply holes, so that the classification accuracy and the processing ability can be improved. Can be improved. Further, even a highly adherent raw material can be smoothly introduced into the classification chamber, and continuous operation is possible. Furthermore, since the swirling speed of the raw material can be increased by the inflow of the secondary air, the classification point can be set on the fine powder side. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a vertical sectional front view showing an embodiment of a raw material supply device according to the present invention. FIG. 2 is a cross-sectional plan view of the raw material supply cylinder of FIG. 1. FIG. 3 is a conventional raw material supply device. [Description of reference numerals] 1 main body casing 4 classification cover 5 raw material supply hole 6 classification plate 7 classification chamber 12 raw material supply cylinder 13 end plate 15 guide vanes 16 secondary air inflow path
Claims (1)
筒内に原料を供給して旋回させ、下方向に移動する原料
を、原料供給筒内の下部外周囲に設けた供給孔から前記
分級室内に導入して微粉と粗粉とに遠心分離する気流分
級機において、前記原料供給筒の外周囲に、原料の旋回
方向に傾斜する複数の案内羽根を環状に配置し、隣接す
る案内羽根間に外部と原料供給筒の内部を連通させる二
次空気流入路を設けたことを特徴とする気流分級機にお
ける原料供給装置。(1) A raw material supply cylinder is provided in the upper part of the classification chamber, the raw material is supplied into the raw material supply cylinder and swirled, and the raw material moving downward is surrounded by the lower outer periphery of the raw material supply cylinder. In an air flow classifier that is introduced into the classification chamber from a supply hole provided in and centrifugally separated into fine powder and coarse powder, a plurality of guide blades inclined in the swirling direction of the raw material are annularly formed around the outer circumference of the raw material supply cylinder. A raw material supply device for an air flow classifier, characterized in that a secondary air inflow path is provided between adjacent guide vanes for communicating the outside with the inside of the raw material supply cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7215713A JP2766790B2 (en) | 1995-08-24 | 1995-08-24 | Raw material supply device in airflow classifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7215713A JP2766790B2 (en) | 1995-08-24 | 1995-08-24 | Raw material supply device in airflow classifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0857424A true JPH0857424A (en) | 1996-03-05 |
| JP2766790B2 JP2766790B2 (en) | 1998-06-18 |
Family
ID=16676944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7215713A Expired - Lifetime JP2766790B2 (en) | 1995-08-24 | 1995-08-24 | Raw material supply device in airflow classifier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2766790B2 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1033180A2 (en) * | 1999-03-03 | 2000-09-06 | Nippon Pneumatic Manufacturing Co. Ltd. | Classifier |
| WO2006126577A1 (en) * | 2005-05-26 | 2006-11-30 | Nippon Pneumatic Manufacturing Co., Ltd. | Airflow classification machine and classification plant |
| WO2007145207A1 (en) * | 2006-06-13 | 2007-12-21 | Nippon Pneumatic Manufacturing Co., Ltd. | Air flow classifier, and classifying plant |
| EP2020266A2 (en) | 2007-07-31 | 2009-02-04 | Nisshin Seifun Group Inc. | Powder classifying device |
| KR101145524B1 (en) * | 2007-05-15 | 2012-05-16 | 가부시키가이샤 리코 | Pulverizing and coarse powder classifying apparatus and fine powder classifying apparatus |
| JP2014168772A (en) * | 2013-03-01 | 2014-09-18 | Changshu Huaneng Environmental Protection Projects Co Ltd | Cyclone separator |
| JP2014168771A (en) * | 2013-03-01 | 2014-09-18 | Changshu Huaneng Environmental Protection Projects Co Ltd | Sensitive type cyclone separator |
| US9415421B2 (en) | 2010-11-16 | 2016-08-16 | Nisshin Seifun Group Inc. | Powder classifying device |
| JPWO2016114234A1 (en) * | 2015-01-16 | 2017-10-19 | 株式会社日清製粉グループ本社 | Powder classifier |
| JP2020006290A (en) * | 2018-07-03 | 2020-01-16 | Fdk株式会社 | Pneumatic sorter |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4972577B2 (en) | 2008-02-15 | 2012-07-11 | 株式会社リコー | Airflow classifier |
| JP2012045477A (en) * | 2010-08-26 | 2012-03-08 | Ricoh Co Ltd | Classifying apparatus and classifying method, toner and method for producing the toner |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5620913A (en) * | 1979-07-30 | 1981-02-27 | Ritsupu Sa | Gas burner |
| JPS6193880A (en) * | 1984-10-15 | 1986-05-12 | 日本ニユ−マチツク工業株式会社 | Sorter |
| JPS6279582U (en) * | 1985-11-05 | 1987-05-21 |
-
1995
- 1995-08-24 JP JP7215713A patent/JP2766790B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5620913A (en) * | 1979-07-30 | 1981-02-27 | Ritsupu Sa | Gas burner |
| JPS6193880A (en) * | 1984-10-15 | 1986-05-12 | 日本ニユ−マチツク工業株式会社 | Sorter |
| JPS6279582U (en) * | 1985-11-05 | 1987-05-21 |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1033180A2 (en) * | 1999-03-03 | 2000-09-06 | Nippon Pneumatic Manufacturing Co. Ltd. | Classifier |
| EP1033180A3 (en) * | 1999-03-03 | 2002-10-16 | Nippon Pneumatic Manufacturing Co. Ltd. | Classifier |
| WO2006126577A1 (en) * | 2005-05-26 | 2006-11-30 | Nippon Pneumatic Manufacturing Co., Ltd. | Airflow classification machine and classification plant |
| JP2007000862A (en) * | 2005-05-26 | 2007-01-11 | Nippon Pneumatic Mfg Co Ltd | Air classifier and classifying plant |
| JP4907655B2 (en) * | 2006-06-13 | 2012-04-04 | 日本ニューマチック工業株式会社 | Airflow classifier and classification plant |
| WO2007145207A1 (en) * | 2006-06-13 | 2007-12-21 | Nippon Pneumatic Manufacturing Co., Ltd. | Air flow classifier, and classifying plant |
| KR101145524B1 (en) * | 2007-05-15 | 2012-05-16 | 가부시키가이샤 리코 | Pulverizing and coarse powder classifying apparatus and fine powder classifying apparatus |
| EP2020266A2 (en) | 2007-07-31 | 2009-02-04 | Nisshin Seifun Group Inc. | Powder classifying device |
| JP2009034560A (en) * | 2007-07-31 | 2009-02-19 | Nisshin Seifun Group Inc | Powder classifying apparatus |
| US8100269B2 (en) | 2007-07-31 | 2012-01-24 | Nisshin Seifun Group, Inc. | Powder classifying device |
| US8668090B2 (en) | 2007-07-31 | 2014-03-11 | Nisshin Seifun Group Inc. | Powder classifying device |
| US9415421B2 (en) | 2010-11-16 | 2016-08-16 | Nisshin Seifun Group Inc. | Powder classifying device |
| JP2014168772A (en) * | 2013-03-01 | 2014-09-18 | Changshu Huaneng Environmental Protection Projects Co Ltd | Cyclone separator |
| JP2014168771A (en) * | 2013-03-01 | 2014-09-18 | Changshu Huaneng Environmental Protection Projects Co Ltd | Sensitive type cyclone separator |
| JPWO2016114234A1 (en) * | 2015-01-16 | 2017-10-19 | 株式会社日清製粉グループ本社 | Powder classifier |
| JP2020006290A (en) * | 2018-07-03 | 2020-01-16 | Fdk株式会社 | Pneumatic sorter |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2766790B2 (en) | 1998-06-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0857424A (en) | Raw material supply device in air classifier | |
| JP3752096B2 (en) | Airflow classifier | |
| JPS59142877A (en) | Air classifier | |
| JP4818807B2 (en) | Airflow classifier and classification plant | |
| JP4907655B2 (en) | Airflow classifier and classification plant | |
| JP2010149090A (en) | Air flow classifier | |
| EP0159766B1 (en) | Particulate classifying apparatus | |
| CA2055124C (en) | Material dispersion apparatus | |
| FI107521B (en) | Device for sorting particle material | |
| JP3902845B2 (en) | Airflow classifier | |
| JPH031098Y2 (en) | ||
| US4596497A (en) | Powder disperser | |
| JP4747130B2 (en) | Powder classifier | |
| JP3752068B2 (en) | Airflow classifier | |
| JPH09206620A (en) | Jet grinder | |
| JPH0248076Y2 (en) | ||
| JPS6193880A (en) | Sorter | |
| JP2579763Y2 (en) | Classifier | |
| RU2192319C1 (en) | Centrifugal classifier | |
| JP3091289B2 (en) | Collision type air crusher | |
| KR840001165B1 (en) | Sorting device | |
| JP3679163B2 (en) | Airflow classifier | |
| JPH0523271Y2 (en) | ||
| JPH01207152A (en) | Gaseous flow classifier | |
| JPH0628755B2 (en) | Powder disperser |
Legal Events
| 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: 19980303 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080403 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080403 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080403 Year of fee payment: 10 |