JP2967304B2 - Classification crusher - Google Patents

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【産業上の利用分野】本発明は、気流分級機を具備した
ジェット気流（高圧気体）を用いて粉砕を行う分級粉砕
装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a classifier / pulverizer equipped with an airflow classifier for performing pulverization using a jet stream (high-pressure gas).

【０００２】[0002]

【従来の技術】ジェット気流を用いた衝突式気流粉砕機
は、ジェット気流に粉体原料を載せ粒子混合気流とし、
加速管の出口より噴射させ、この粒子混合気流を加速管
の出口前方に設けた衝突部材の衝突面に衝突させて、そ
の衝撃力により前記粉体原料を粉砕せんとするものであ
る。2. Description of the Related Art In an impingement type air flow pulverizer using a jet air flow, a powder raw material is placed on a jet air flow to form a particle mixed air flow.
Injection is performed from the outlet of the accelerating tube, and the mixed gas stream is caused to collide with a collision surface of a collision member provided in front of the outlet of the accelerating tube, and the powder material is pulverized by the impact force.

【０００３】以下に、その詳細を図５に基づいて説明す
る。The details will be described below with reference to FIG.

【０００４】高圧気体供給ノズル３１を接続した加速管
３２の出口３３に対向して衝突部材３６を設け、前記加
速管３２に供給した高圧気体の流動により、加速管３２
の中途に連通させた被粉砕物供給口から加速管３２の内
部に粉体原料を吸引し、これを高圧気体とともに噴射し
て衝突部材３６の衝突面に衝突させ、その衝撃によって
粉砕するようにしたものである。[0004] A collision member 36 is provided opposite the outlet 33 of the acceleration tube 32 to which the high-pressure gas supply nozzle 31 is connected.
The powder raw material is sucked into the accelerating tube 32 from the supply port of the material to be ground which is communicated on the way, and is injected together with the high-pressure gas to collide with the collision surface of the collision member 36 so that the powder is pulverized by the impact. It was done.

【０００５】しかしながら、上記従来例では、加速管内
に吸引導入された被粉砕物を高圧気流中で十分に分散さ
せることは困難であり、加速管出口から噴出する高圧気
流に被粉砕物を載せた粒子混合気流は、被粉砕物の含有
濃度の高い流れと低い流れに分離してしまい、そのため
被粉砕物は対向する衝突部材に部分的に集中して衝突す
ることになり、効率が低下し処理能力の低下を引き起こ
している。However, in the above-mentioned conventional example, it is difficult to sufficiently disperse the crushed material sucked and introduced into the acceleration tube in the high-pressure airflow, and the crushed material is placed on the high-pressure airflow ejected from the acceleration tube outlet. The particle-mixed gas stream is separated into a stream having a high concentration of the material to be crushed and a stream having a low concentration of the material to be crushed. Causing a decline in ability.

【０００６】一方、従来かかる粉砕機における衝突部材
の衝突面は、図５及び図６に示すように、被粉砕物を載
せた高圧気流方向（加速管の軸方向）に対し垂直あるい
は傾斜（例えば４５°）している平面状のものが用いら
れてきた（特開昭５７−５０５５４号公報及び特開昭５
８−１４３８５３号公報参照）。On the other hand, as shown in FIGS. 5 and 6, the collision surface of a collision member in such a conventional crusher is perpendicular or inclined (for example, in the direction of the high-pressure airflow (axial direction of the acceleration tube)) on which the material to be crushed is placed. (See Japanese Patent Application Laid-Open Nos. Sho 57-50554 and Sho 5)
No. 8-143853).

【０００７】図５のように、加速管３２の軸方向と垂直
な衝突面３９の場合、加速管出口３３から吹き出される
被粉砕物と衝突面３９で反射される粉砕物とが衝突面３
９の近傍で共存する割合が高く、そのため、衝突面３９
近傍での粉体（被粉砕物及び粉砕物）濃度が高くなり、
粉砕効率が良くない。As shown in FIG. 5, in the case of a collision surface 39 perpendicular to the axial direction of the accelerating tube 32, the crushed material blown out from the acceleration tube outlet 33 and the crushed material reflected on the collision surface 39 are collided with the collision surface 3.
9 is high in the vicinity of the collision surface 39,
Powder (pulverized material and crushed material) concentration in the vicinity increases,
The grinding efficiency is not good.

【０００８】また、図６の粉砕機においては、衝突面４
０が加速管３２の軸方向に対して傾斜しているために、
衝突面４０近傍の粉体濃度は図５の粉砕機と比較して低
くなるが、高圧気流による衝突力が分散されて低下す
る。さらに、粉砕室壁４１との二次衝突を有効に利用し
ているとはいえない。例えば、図６に示す如く、衝突面
４０の角度が加速管に対し４５°傾斜のものでは、熱可
塑性樹脂を粉砕するときに上記のような問題点は少な
い。しかしながら、衝突する際に粉砕に使われる衝撃力
が小さく、さらに粉砕室壁４１との二次衝突による粉砕
が少ないので、粉砕能力は図５の粉砕機と比較して１／
２〜１／１．５に粉砕能力が落ちる。Further, in the crusher shown in FIG.
Since 0 is inclined with respect to the axial direction of the acceleration tube 32,
Although the powder concentration in the vicinity of the collision surface 40 is lower than that of the pulverizer of FIG. 5, the collision force due to the high-pressure airflow is dispersed and lowers. Furthermore, it cannot be said that the secondary collision with the crushing chamber wall 41 is effectively used. For example, as shown in FIG. 6, when the collision surface 40 is inclined at an angle of 45 ° with respect to the accelerating tube, the above-mentioned problems are less when pulverizing the thermoplastic resin. However, since the impact force used for pulverization at the time of collision is small and pulverization due to secondary collision with the pulverization chamber wall 41 is small, the pulverization ability is 1 / compared to the pulverizer of FIG.
The crushing ability drops to 2 to 1 / 1.5.

【０００９】また、衝突式気流粉砕機に具備する気流分
級機としては、種々の分級機が提案されている。その代
表的なものとして、図７に示したようなディスパージョ
ンセパレーター（日本ニューマチック工業社製）が一般
的に用いられている。Various classifiers have been proposed as an airflow classifier provided in a collision type airflow pulverizer. As a typical example, a dispersion separator (manufactured by Nippon Pneumatic Industries, Ltd.) as shown in FIG. 7 is generally used.

【００１０】しかし、図７に示したようなこの種の気流
分級機の分級室への粉体材料供給部は、サイクロン状の
形状をなしており、上部カバー５０の上面中央部には案
内筒５１を起立状に設け、該案内筒５１の上部外周面に
供給筒５２が接続されている。供給筒５２は、案内筒５
１の外周に供給筒５２を介して供給される粉体材料が案
内筒内円周接線方向に導入されるように接続されてい
る。該供給筒５２より案内筒５１内に粉体材料を供給す
ると、該粉体材料は案内筒５１の内周面に沿って旋回し
ながら下降する。この場合粉体材料は、供給筒５２より
案内筒５１内周面に沿って帯状に下降するため分級室５
３に流入する粉体材料の分布及び濃度が不均一となり
（分級室へ案内筒内周面の一部からのみ粉体材料は流入
する）、分散が悪い。However, the powder material supply section to the classifying chamber of this type of airflow classifier as shown in FIG. 7 has a cyclone shape, and a guide cylinder is provided at the center of the upper surface of the upper cover 50. A supply cylinder 52 is connected to the upper outer peripheral surface of the guide cylinder 51. The supply cylinder 52 includes the guide cylinder 5
The powder material supplied through the supply cylinder 52 to the outer periphery of the first cylinder 1 is connected so as to be introduced in a circumferential tangential direction in the guide cylinder. When the powder material is supplied from the supply tube 52 into the guide tube 51, the powder material descends while turning along the inner peripheral surface of the guide tube 51. In this case, since the powder material descends from the supply cylinder 52 along the inner peripheral surface of the guide cylinder 51 in a belt shape, the classification chamber 5
The distribution and concentration of the powder material flowing into 3 become non-uniform (the powder material flows into the classifying chamber only from a part of the inner peripheral surface of the guide cylinder), and the dispersion is poor.

【００１１】また、処理量を大きくとると粉体材料の凝
集が一層起こり易く、さらに分散が十分に行われなくな
り、高精度の分級が行えないという問題点がある。ま
た、粉体材料を搬送するエアー量が多い場合、分級室５
３に流入するエアーの量が多いため分級室において旋回
する粒子の中心向き速度が大きくなり分離粒子径が大き
くなるという問題点がある。Further, when the processing amount is increased, the powder materials are more likely to agglomerate, dispersing is not sufficiently performed, and high-precision classification cannot be performed. If the amount of air for conveying the powder material is large, the classifying chamber 5
3 has a problem that the amount of air flowing into the classifying chamber 3 is large, so that the velocity of the particles swirling in the classification chamber toward the center increases, and the diameter of the separated particles increases.

【００１２】したがって、通常分離粒子径を小さくする
場合、案内筒上部５４よりエアーをダンパーによりコン
トロールして抜いているが、抜くエアー量が多いと粉体
材料の一部も排出し、損失するという実用上の問題点が
生じる場合もある。Therefore, when the diameter of the separated particles is usually reduced, the air is controlled and discharged from the upper portion 54 of the guide cylinder by a damper. However, if the amount of the discharged air is large, a part of the powder material is also discharged and lost. There may be practical problems.

【００１３】[0013]

【発明が解決しようとする課題】上記従来技術の問題点
に鑑み、本発明の目的とするところは、 ．被粉砕物をより一層効率良く粉砕する点、 ．粉砕物の融着，凝集，粗粒化，あるいは加速管内壁
や衝突部材の衝突面での極部的摩耗の発生を防止する
点、等を達成し得る分級粉砕装置を提供することにあ
る。SUMMARY OF THE INVENTION In view of the above-mentioned problems of the prior art, the objects of the present invention are as follows. Crushing the material to be crushed more efficiently; It is an object of the present invention to provide a classifying pulverizing apparatus capable of achieving fusion of a pulverized material, coagulation, coarsening, prevention of occurrence of extreme wear on the inner wall of an accelerating tube and a collision surface of a collision member, and the like.

【００１４】[0014]

【課題を解決するための手段】上記目的を達成するため
の本発明の構成は、分級室の底部に中央部が高くなる傾
斜状の分級板を有し、該分級室において搬送エアーとと
もに供給された粉体材料を分級ルーバーを介して流入す
る気流によって旋回流動させて微粉と粗粉とに遠心分離
し、微粉を分級板の中央部に設けられた排出口に接続し
た微粉排出シュートへ排出させるとともに、粗粉を分級
板の外周部に形成した粗粉排出口より排出し得る、該分
級室の上部に粉体供給筒と連通する環状の案内室を設
け、該案内室と該分級室との間に案内室の内周円方向の
接線方向に先端を向けた複数のルーバーを設けた気流分
級機と、高圧気体により被粉砕物を搬送加速するための
加速管と、該加速管出口に対向して設けた衝突面を有す
る衝突部材を有し、該加速管は、中心軸が鉛直方向に位
置し、且つラバールノズルを成しており、該加速管のス
ロート部内の横断面中央に被粉砕物供給口が位置するよ
うに設けられ、該被粉砕物供給口外壁と該スロート部内
壁間に高圧気体を供給する供給口を設けた衝突式気流粉
砕機とを具備し、該衝突式気流粉砕機の被粉砕物供給口
と該気流分級機の粗粉排出口とを連通させたことを特徴
とする分級粉砕装置、としている点にある。In order to achieve the above-mentioned object, the present invention has a structure in which a classification plate having an inclined center whose height is high at the bottom of a classification chamber is supplied together with carrier air in the classification chamber. The powdered material is swirled by an airflow flowing through a classification louver, centrifuged into fine powder and coarse powder, and the fine powder is discharged to a fine powder discharge chute connected to a discharge port provided at the center of the classification plate. At the same time, an annular guide chamber communicating with the powder supply cylinder is provided at an upper part of the classifying chamber, which can discharge coarse powder from a coarse powder discharge port formed on an outer peripheral portion of the classifying plate. An airflow classifier provided with a plurality of louvers with tips directed in the tangential direction of the inner circumferential direction of the guide chamber between the guide chamber, an accelerating tube for conveying and accelerating the object to be ground by high-pressure gas, and an outlet for the accelerating tube. A collision member having a collision surface provided opposite to the collision member, The accelerating tube has a central axis positioned in the vertical direction and forms a Laval nozzle. The accelerating tube is provided such that the material supply port is located at the center of the cross section in the throat portion of the accelerating tube. An impingement-type airflow pulverizer provided with a supply port for supplying high-pressure gas between the outer wall of the mouth and the inner wall of the throat portion, and a pulverized material supply port of the impingement-type airflow pulverizer and coarse powder discharge of the airflow classifier. The classification and crushing device is characterized in that it communicates with the outlet.

【００１５】また、本発明の特徴としているところは、
該衝突部材の衝突面の先端部分が、頂角１１０〜１７５
°を有する錐体形状を有する分級粉砕装置としている点
にもある。Further, the feature of the present invention is as follows.
The tip of the collision surface of the collision member has an apex angle of 110 to 175.
There is also a point that a classifying and pulverizing apparatus having a cone shape having a degree is used.

【００１６】また、本発明の特徴としているところは、
該被粉砕物の衝突部材での粉砕が行われる粉砕室は、断
面形状が円形状もしくは楕円形状を有し、かつ衝突部材
の後方に粉砕物排出口を設けた分級粉砕装置としている
点にある。The feature of the present invention is as follows.
The crushing chamber in which the crushed object is crushed by the collision member is a classifying crusher having a circular or elliptical cross section and a crushed material discharge port provided behind the collision member. .

【００１７】さらに、本発明の特徴としているところ
は、該粉砕室は、該加速管出口を有する粉砕室前壁及び
該衝突部材で粉砕された被粉砕物を衝突によりさらに粉
砕するための粉砕室側壁を有し、該粉砕室前壁と該粉砕
室側壁とが連設されている分級粉砕装置としている点に
ある。Further, a feature of the present invention is that the pulverizing chamber has a front wall of the pulverizing chamber having an outlet of the accelerating tube and a pulverizing chamber for further pulverizing an object to be pulverized by the collision member by collision. The present invention is characterized in that a classifying pulverizer having a side wall and having a front wall of the pulverizing chamber and a side wall of the pulverizing chamber connected to each other.

【００１８】以上の構成を具備した本発明の分級粉砕装
置によれば、被粉砕物を効率良く高速気流を利用して数
十μｍ〜サブμｍのオーダーに粉砕することができる。According to the classifying and crushing apparatus of the present invention having the above-described structure, the object to be crushed can be efficiently crushed to the order of several tens μm to sub-μm by using a high-speed air flow.

【００１９】尚、本発明の構成要素及び作用の詳細につ
いては、以下の実施例にて説明する。The components and functions of the present invention will be described in detail in the following embodiments.

【００２０】[0020]

【実施例】図１は、本発明の分級粉砕装置の一実施例を
示す概略的断面図である。さらに、図２，図３及び図４
は、それぞれ図１のＡ−Ａ´線，Ｂ−Ｂ´線，Ｃ−Ｃ´
線における断面図を示す。FIG. 1 is a schematic sectional view showing one embodiment of the classifying and pulverizing apparatus of the present invention. Further, FIGS. 2, 3 and 4
Are respectively the AA 'line, the BB' line, and the CC 'line in FIG.
FIG.

【００２１】先ず、本発明に用いた衝突式気流粉砕機に
ついて、図１に基づいて説明する。本発明に係る粉砕機
では、粉砕されるべき被粉砕物１４が、加速管２の上方
に設けられた被粉砕物供給口１より加速管スロート部３
を通過して加速管２に供給される。加速管２には圧縮空
気の如き圧縮気体が該スロート部内壁と該被粉砕物供給
口外壁の間から導入されており、加速管２に供給された
被粉砕物１４は瞬時に加速されて高速度を有するように
なる。そして、高速度で加速管出口４から粉砕室５に噴
出された被粉砕物１５は、衝突部材６の衝突面７に衝突
して粉砕される。First, the collision type air flow pulverizer used in the present invention will be described with reference to FIG. In the crusher according to the present invention, the crushed object 14 to be crushed is supplied from the crushed object supply port 1 provided above the acceleration tube 2 to the acceleration tube throat portion 3.
And is supplied to the acceleration tube 2. Compressed gas such as compressed air is introduced into the accelerating tube 2 from between the inner wall of the throat portion and the outer wall of the crushed material supply port, and the crushed material 14 supplied to the accelerating tube 2 is instantaneously accelerated to a high level. You will have speed. The crushed object 15 ejected from the acceleration tube outlet 4 into the crushing chamber 5 at a high speed collides with the collision surface 7 of the collision member 6 and is crushed.

【００２２】このとき、かかる粉砕機において、加速管
２の中心軸を鉛直方向にし、被粉砕物を加速管２のスロ
ート部３中央から投入することにより、加速管内の被粉
砕物を分散し、加速管出口４から被粉砕物を均一に噴出
させ、対向する衝突部材６の衝突面７に効率良く衝突さ
せることで、粉砕効率を従来より向上させることができ
る。At this time, in such a pulverizer, the center axis of the accelerating tube 2 is set in the vertical direction, and the object to be pulverized is introduced from the center of the throat portion 3 of the accelerating tube 2 to disperse the object to be pulverized in the accelerating tube. By uniformly jetting the object to be ground from the acceleration tube outlet 4 to efficiently collide with the collision surface 7 of the opposing collision member 6, the pulverization efficiency can be improved as compared with the related art.

【００２３】図２は、図１に示す衝突式気流粉砕機のＡ
−Ａ´面における断面図を概略的に示したものであり、
中央の円が粉体の通路、そのまわりが高圧気体の通路で
ある。これによれば、被粉砕物がスロート部径方向に片
寄りが無く吸い込まれていくのが知見される。FIG. 2 shows A of the impingement type airflow pulverizer shown in FIG.
FIG. 3 schematically shows a cross-sectional view along the −A ′ plane;
The center circle is the passage for the powder, and the periphery is the passage for the high-pressure gas. According to this, it is found that the material to be ground is sucked without deviation in the throat portion radial direction.

【００２４】さらに、図１の粉砕機において、衝突面７
が頂角１１０〜１７５°、好ましくは１６０°近傍を有
する錐体形状を有しているので、粉砕された粉砕物は実
質的に全周方向に分散され、粉砕室壁８と二次衝突を起
こし、さらに粉砕される。Further, in the crusher shown in FIG.
Has a cone shape having an apex angle of 110 to 175 °, preferably around 160 °, so that the crushed material is substantially dispersed in the entire circumferential direction, and a secondary collision with the crushing chamber wall 8 occurs. Raised and further crushed.

【００２５】図３は、図１に示す衝突式気流粉砕装置の
Ｂ−Ｂ´面における断面図を概略的に示したものであ
り、衝突面７で衝突した後の粉砕物の分散状態を模式的
に示す。この図から分かるように、本発明の衝突式気流
粉砕装置では、粉砕室壁８における粉砕物の二次衝突が
有効に利用されていることが知見される。すなわち、図
１に示す如く衝突面７により粉砕物が良好に衝突部材の
径方向に拡散されるので、粉砕室壁８が広く二次衝突に
利用される。そのため、衝突面７の近傍における被粉砕
物の濃度が濃くならないので、粉砕の処理能率を向上さ
せることができ、衝突面７における被粉砕物の融着を良
好に抑制することが可能である。FIG. 3 is a schematic cross-sectional view taken along the plane BB 'of the impingement type air current pulverizer shown in FIG. Is shown. As can be seen from this figure, it is found that in the collision type airflow pulverizer of the present invention, the secondary collision of the pulverized material on the pulverization chamber wall 8 is effectively used. That is, as shown in FIG. 1, the crushed material is favorably diffused in the radial direction of the collision member by the collision surface 7, so that the crushing chamber wall 8 is widely used for secondary collision. Therefore, the concentration of the object to be ground in the vicinity of the collision surface 7 does not increase, so that the processing efficiency of the grinding can be improved, and the fusion of the object to be ground at the collision surface 7 can be suppressed well.

【００２６】流れに基づいて説明すると、粉砕室５に導
入された被粉砕物は、衝突面７における一次の衝突によ
る粉砕が行われ、次いで粉砕室壁８における二次の衝突
による粉砕がさらに行われ、場合により、粉砕された粉
砕物は排出口９に搬送されるまでに粉砕室壁８及び衝突
部材６の側面との三次（及び四次）の衝突によりさらに
粉砕されて、排出口９から排出されることになる。To be described based on the flow, the object to be pulverized introduced into the pulverizing chamber 5 is pulverized by primary collision at the collision surface 7 and then pulverized by secondary collision at the pulverizing chamber wall 8. In some cases, the crushed pulverized material is further pulverized by tertiary (and quaternary) collision with the pulverizing chamber wall 8 and the side surface of the collision member 6 before being conveyed to the discharge port 9. Will be discharged.

【００２７】以上説明したように、加速管２内の被粉砕
物を分散し、加速管出口４から被粉砕物を均一に噴出さ
せ、錐体形状を有する衝突部材６に効率良く衝突させ
て、さらに衝突部材の全周方向に分散させ、粉砕室壁８
と二次衝突を起こさせることにより、樹脂や粘着性のあ
るものを含有する被粉砕物を粉砕した時でも、加速管内
や衝突面で融着，凝集物等が生じることはない。また、
無機金属性物質を含有する被粉砕物を粉砕した時でも、
加速管内及び衝突面でこすり摩耗及び引きさき摩耗等が
生じることもなく、装置を安定して運転することが可能
となる。As described above, the material to be crushed in the accelerating tube 2 is dispersed, the material to be crushed is jetted out uniformly from the outlet 4 of the accelerating tube, and efficiently collided with the collision member 6 having a cone shape. Further, it is dispersed in the entire circumferential direction of the collision member,
When the object to be pulverized containing resin or sticky material is pulverized, no fusion or agglomeration is generated in the accelerating tube or at the collision surface. Also,
Even when crushing the material to be crushed containing inorganic metallic substances,
The apparatus can be operated stably without rubbing wear, pulling wear, etc. occurring in the acceleration tube and the collision surface.

【００２８】次に、本発明に係る気流分級機を図１に基
づいて説明する。Next, an air flow classifier according to the present invention will be described with reference to FIG.

【００２９】本図において、１６は筒状の本体ケーシン
グを示し、１７は下部ケーシングを示し、その下部に粗
粉排出用のホッパー１８が接続されている。本体ケーシ
ング１６の内部は、分級室１９が形成されており、この
分級室１９の上部は本体ケーシング１６の上部に取付け
た環状の案内室２０と中央部が高くなる円錐状（傘状）
の上部カバー２１によって閉鎖されている。In this figure, reference numeral 16 denotes a cylindrical main body casing, 17 denotes a lower casing, and a hopper 18 for discharging coarse powder is connected to a lower portion thereof. A classifying chamber 19 is formed inside the main body casing 16, and an upper part of the classifying chamber 19 has an annular guide chamber 20 attached to an upper part of the main body casing 16 and a conical shape whose central part is high (umbrella shape).
Is closed by an upper cover 21.

【００３０】分級室１９と案内室２０の間の仕切壁に図
１に示す衝突式気流粉砕装置のＣ−Ｃ´面における断面
図である図４に示す如く円周方向に配列する複数のルー
バー２２を設け、案内室２０に送り込まれた粉体材料と
エアーを各ルーバー２２の間より分級室１９に旋回させ
て流入させる。なお、供給筒２３を経て案内室２０の中
を流動するエアーと粉体材料は、各ルーバー２２に均一
に分配されることが精度よく分級するために必要であ
る。ルーバー２２へ到達するまでの流路は遠心力による
濃縮が起りにくい形状にする必要があり、本実施例で
は、供給筒を分級室１９の水平面に対して垂直な上方向
から接続しているが、これに限定されるものではない。A plurality of louvers arranged in a circumferential direction as shown in FIG. 4 which is a cross-sectional view taken along the line CC 'of the impingement type air current pulverizer shown in FIG. 1 is provided on a partition wall between the classifying chamber 19 and the guide chamber 20. 22 is provided, and the powder material and the air fed into the guide chamber 20 are swirled and flow into the classification chamber 19 from between the louvers 22. The air and the powder material flowing in the guide chamber 20 via the supply tube 23 are required to be uniformly distributed to each louver 22 in order to accurately classify them. The flow path up to the louver 22 needs to have a shape in which concentration due to centrifugal force is unlikely to occur. In the present embodiment, the supply cylinder is connected from the upper side perpendicular to the horizontal plane of the classification chamber 19. However, the present invention is not limited to this.

【００３１】このようにして、ルーバー２２を介して、
エアーと粉体材料は分級室１９へ供給され、ルーバー２
２を介して、分級室１９へ供給する際に、従来の方式よ
り著しい分散の向上が得られる。また、ルーバー２２は
可動であり、ルーバー間隔は調整できる。Thus, through the louver 22,
The air and the powder material are supplied to the classification chamber 19,
When supplied to the classifying chamber 19 via 2, a significant improvement in the dispersion is obtained compared to the conventional method. The louver 22 is movable, and the louver interval can be adjusted.

【００３２】本体ケーシング１６の下部には円周方向に
配列する分級ルーバー２４を設け、外部から分級室１９
へ旋回流を起こす分級エアーを分級ルーバー２４を介し
て取り入れている。A classification louver 24 arranged in the circumferential direction is provided at a lower portion of the main casing 16, and a classification chamber 19 is externally provided.
Classification air that causes a swirling flow is introduced through a classification louver 24.

【００３３】分級室１９の底部に、中央部が高くなる円
錐状（傘状）の分級板２５を設け、該分級板２５の外周
囲に粗粉排出口２６を形成する。また、分級板２５の中
央部には微粉排出シュート２７を接続し、該シュート２
７の下端部をＬ字形に屈曲し、この屈曲端部を下部ケー
シング１７の側壁より外部に位置させる。さらに、該シ
ュート２７はサイクロンや集塵機のような微粉回収手段
を介して吸引ファンに接続しており、該吸引ファンによ
り分級室１９に吸引力を作用させ、該ルーバー２４間よ
り分級室１９に流入する吸引エアーによって分級に要す
る旋回流を起こしている。At the bottom of the classifying chamber 19, a conical (umbrella-shaped) classifying plate 25 having a raised central portion is provided, and a coarse powder discharge port 26 is formed around the outside of the classifying plate 25. A fine powder discharge chute 27 is connected to the center of the classifying plate 25,
The lower end of 7 is bent into an L shape, and the bent end is located outside the side wall of the lower casing 17. Further, the chute 27 is connected to a suction fan via fine powder collecting means such as a cyclone or a dust collector, and a suction force is applied to the classification chamber 19 by the suction fan to flow into the classification chamber 19 from between the louvers 24. The swirling flow required for classification is caused by the suction air.

【００３４】本実施例で示す気流分級機は、上記の構造
から成り、供給筒２３より案内筒２０内に粉体材料をエ
アーとともに供給すると、この粉体材料を含むエアー
は、案内室２０から各ルーバー２２間を通過して分級室
１９に旋回しながら均一の濃度で分散されながら流入す
る。The air flow classifier shown in this embodiment has the above structure. When a powder material is supplied from the supply cylinder 23 into the guide cylinder 20 together with air, the air containing the powder material is supplied from the guide chamber 20 to the guide chamber 20. After passing between the respective louvers 22, they are swirled into the classifying chamber 19 while being dispersed at a uniform concentration.

【００３５】分級室１９内に旋回しながら流入した粉体
材料は、微粉排出シュート２７に接続した吸引ファンに
より、分級室下部の分級ルーバー２４間より流入する吸
引エアー流にのって旋回を増し、各粒子に作用する遠心
力によって粗粉と微粉とに遠心分離され、分級室１９内
の外周部を旋回する粗粉は粗粉排出口２６より排出さ
れ、下部のホッパー１８より排出される。また、分級板
２５の上部傾斜面に沿って中央部へと移行する微粉は微
粉排出シュート２７により、微粉回収手段へ排出され
る。The powder material which has swirled into the classifying chamber 19 is swirled by the suction fan connected to the fine powder discharge chute 27 along with the suction air flow flowing from between the classifying louvers 24 below the classifying chamber. The coarse powder, which is centrifuged into coarse powder and fine powder by the centrifugal force acting on each particle, is swirled around the outer periphery of the classifying chamber 19, is discharged from the coarse powder discharge port 26, and is discharged from the lower hopper 18. The fine powder moving to the center along the upper inclined surface of the classification plate 25 is discharged to the fine powder collecting means by the fine powder discharge chute 27.

【００３６】分級室１９に粉体材料とともに流入するエ
アーは、すべて旋回流となって流入するため、分級室１
９内で旋回する粒子の中心向きの速度は遠心力に比べ相
対的に小さくなり、分級室１９において分離粒子径の小
さな分級が行われ、粒子径の非常に小さな微粉を微粉排
出シュート２７に排出させることができる。しかも、粉
体材料がほぼ均一な濃度で分級室に流入するため精緻な
分布の粉体として得ることができる。The air flowing into the classifying chamber 19 together with the powder material flows in a swirling flow.
The velocity of the particles turning in the center 9 toward the center becomes relatively small as compared with the centrifugal force, and the classification of the separated particle diameter is performed in the classification chamber 19, and the fine powder having a very small particle diameter is discharged to the fine powder discharge chute 27. Can be done. In addition, since the powder material flows into the classifying chamber at a substantially uniform concentration, it can be obtained as a finely distributed powder.

【００３７】本発明は、かかる衝突式気流粉砕機と気流
分級機を図１に示す如く、衝突式気流粉砕機の被粉砕物
供給口と気流分級機の粗粉排出口を連通させ、かつ衝突
式気流粉砕機の粉砕物排出口と気流分級機の粉体供給筒
とを連通させた粉砕装置である。According to the present invention, as shown in FIG. 1, the collision type air flow pulverizer and the air flow classifier are connected to each other through a supply port of a pulverized material of the collision type air flow pulverizer and a coarse powder discharge port of the air flow classifier. This is a pulverizing apparatus in which a pulverized material discharge port of an airflow pulverizer communicates with a powder supply cylinder of an airflow classifier.

【００３８】本発明において、被粉砕物である粉砕用原
料は適宜の導入手段により、図１中の原料投入口１５よ
り導入され、また、最終的に得られた粉砕物は微粉排出
シュート２７により系外に排出される。In the present invention, a raw material for pulverization, which is a material to be pulverized, is introduced from a raw material inlet 15 in FIG. 1 by an appropriate introduction means, and a finally obtained pulverized material is supplied through a fine powder discharge chute 27. It is discharged out of the system.

【００３９】[0039]

【発明の効果】以上説明したように、本発明の分級粉砕
装置によれば、加速管内で被粉砕物の分散が良好になる
ため、衝突部材の衝突面に効率良く被粉砕物が衝突し、
粉砕効率が向上する。As described above, according to the classification and crushing apparatus of the present invention, since the crushed object is dispersed well in the acceleration tube, the crushed object collides with the collision surface of the collision member efficiently.
The grinding efficiency is improved.

【００４０】さらに、衝突部材の衝突面の形状を特定の
錐体形状にすることにより、被粉砕物が粉砕室壁へ強く
二次衝突することで、従来の粉砕能力を著しく向上する
ことができる。Further, by setting the shape of the collision surface of the collision member to a specific cone shape, the object to be pulverized strongly secondary-collides with the wall of the pulverizing chamber, so that the conventional pulverizing ability can be remarkably improved. .

【００４１】従って、被粉砕物の分散が良好になり、加
速管内及び衝突部材の衝突面において、摩耗や融着物の
発生が大幅に低減し、装置の安定稼働が可能になる。Accordingly, the dispersion of the material to be pulverized is improved, the occurrence of abrasion and the generation of fused material in the accelerating tube and the collision surface of the collision member are greatly reduced, and the stable operation of the apparatus becomes possible.

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

【図１】本発明を実施した分級粉砕装置の概略的断面図
である。FIG. 1 is a schematic sectional view of a classification and crushing apparatus embodying the present invention.

【図２】図１のＡ−Ａ´断面図を示す。FIG. 2 is a sectional view taken along line AA ′ of FIG.

【図３】図１のＢ−Ｂ´断面図を示す。FIG. 3 is a sectional view taken along line BB ′ of FIG. 1;

【図４】図１のＣ−Ｃ´断面図を示す。FIG. 4 is a sectional view taken along the line CC ′ of FIG. 1;

【図５】衝突式気流粉砕機の従来例を示す断面図であ
る。FIG. 5 is a cross-sectional view showing a conventional example of a collision-type airflow pulverizer.

【図６】衝突式気流粉砕機の従来例を示す断面図であ
る。FIG. 6 is a cross-sectional view showing a conventional example of a collision type airflow pulverizer.

【図７】気流分級機の従来例を示す断面図である。FIG. 7 is a cross-sectional view showing a conventional example of an airflow classifier.

【符号の説明】[Explanation of symbols]

１ 被粉砕物供給口 ２ 加速管 ３ 加速管スロート部 ４ 加速管出口 ５ 粉砕室 ６ 衝突部材 ７ 衝突面 ８ 粉砕室壁 ９ 粉砕物排出口 １０ 被粉砕物供給筒 １１ 高圧気体チャンバー １３ 高圧気体供給口 １４ 被粉砕物 １５ 原料導入部 １６ 分級機本体ケーシング １７ 分級機下部ケーシング １８ 粗粉排出ホッパー １９ 分級室 ２０ 案内室 ２１ 上部カバー ２２ ルーバー ２３ 供給筒 ２４ ルーバー ２５ 分級板 ２６ 粗粉排出口 ２７ 微粉排出シュート DESCRIPTION OF SYMBOLS 1 Pulverized material supply port 2 Acceleration tube 3 Acceleration tube throat part 4 Acceleration tube outlet 5 Pulverization chamber 6 Collision member 7 Collision surface 8 Pulverization chamber wall 9 Pulverized material discharge port 10 Pulverized material supply cylinder 11 High pressure gas chamber 13 High pressure gas supply Mouth 14 Material to be crushed 15 Raw material introduction part 16 Classifier main body casing 17 Classifier lower casing 18 Coarse powder discharge hopper 19 Classifier room 20 Guide room 21 Upper cover 22 Louver 23 Supply cylinder 24 Louver 25 Classifier plate 26 Coarse powder outlet 27 Fine powder Discharge chute

───────────────────────────────────────────────────── フロントページの続き (72)発明者 宮野 和幸 東京都大田区下丸子３丁目30番２号 キ ヤノン株式会社内 (56)参考文献 特開 平１−254266（ＪＰ，Ａ) 特開 昭54−117971（ＪＰ，Ａ) 特開 平１−207152（ＪＰ，Ａ) 実公 昭28−1387（ＪＰ，Ｙ１) 実公 昭28−10279（ＪＰ，Ｙ１) (58)調査した分野(Int.Cl.⁶，ＤＢ名) B02C 19/06 B07B 7/08 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuyuki Miyano 3-30-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc. (56) References JP-A-1-254266 (JP, A) JP-A Sho54 JP-A-117971 (JP, A) JP-A-1-207152 (JP, A) JP-A-28-1387 (JP, Y1) JP-A-28-10279 (JP, Y1) (58) Fields investigated (Int. . ⁶ , DB name) B02C 19/06 B07B 7/08

Claims (4)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 分級室の底部に中央部が高くなる傾斜状
の分級板を有し、該分級室において搬送エアーとともに
供給された粉体材料を分級ルーバーを介して流入する気
流によって旋回流動させて微粉と粗粉とに遠心分離し、
微粉を分級板の中央部に設けられた排出口に接続した微
粉排出シュートへ排出させるとともに、粗粉を分級板の
外周部に形成した粗粉排出口より排出し得る、該分級室
の上部に粉体供給筒と連通する環状の案内室を設け、該
案内室と該分級室との間に案内室の内周円方向の接線方
向に先端を向けた複数のルーバーを設けた気流分級機
と、 高圧気体により被粉砕物を搬送加速するための加速管
と、該加速管出口に対向して設けた衝突面を有する衝突
部材を有し、該加速管は、中心軸が鉛直方向に位置し、
且つラバールノズルを成しており、該加速管のスロート
部内の横断面中央に被粉砕物供給口が位置するように設
けられ、該被粉砕物供給口外壁と該スロート部内壁間に
高圧気体を供給する供給口を設けた衝突式気流粉砕機と
を具備し、該衝突式気流粉砕機の被粉砕物供給口と該気
流分級機の粗粉排出口とを連通させたことを特徴とする
分級粉砕装置。1. A classifying plate having an inclined central portion at the bottom of the classifying chamber, the center of which rises, and the powder material supplied together with the conveying air in the classifying chamber is swirled by an airflow flowing through a classifying louver. Centrifuged into fine powder and coarse powder,
The fine powder is discharged to a fine powder discharge chute connected to a discharge port provided at the center of the classification plate, and the coarse powder can be discharged from a coarse powder discharge port formed on the outer periphery of the classification plate. An airflow classifier provided with an annular guide chamber communicating with the powder supply cylinder, and provided with a plurality of louvers whose front ends are directed between the guide chamber and the classifying chamber in the tangential direction of the inner circumferential direction of the guide chamber. the acceleration tube for conveying accelerate by the high-pressure gas Rikomu ground product has a collision member with collision surface provided opposite to the pressurized-speed tube outlet, the pressurized-speed tube, the central axis in a vertical direction Position to,
And which forms included rubber Runozuru, set as the object to be crushed supply opening in its cross-section center of the throat <br/> portion of the pressurized-speed tube is located
A crushing airflow crusher provided with a supply port for supplying high-pressure gas between the outer wall of the crushed material supply port and the inner wall of the throat portion, and a crushed material supply port of the crushed airflow crusher; Characterized in that it communicates with the coarse powder discharge port of the airflow classifier.
Classification crusher. 【請求項２】 該衝突部材の衝突面の先端部分が、頂角
１１０〜１７５°を有する錐体形状であることを特徴と
する請求項１に記載の分級粉砕装置。2. The classification and crushing apparatus according to claim 1 , wherein a tip portion of the collision surface of the collision member has a cone shape having an apex angle of 110 to 175 °. 【請求項３】 該被粉砕物の衝突部材での粉砕が行われ
る粉砕室は、断面形状が円形状もしくは楕円形状を有
し、かつ衝突部材の後方に粉砕物排出口を設けたことを
特徴とする請求項１に記載の分級粉砕装置。3. The crushing of the object to be crushed by a collision member is performed.
That grinding chamber, classifier milling device according to claim 1 in which the cross-sectional shape, characterized in that a circular or elliptical shape has, and pulverized product discharge outlet at the rear of the impact member. 【請求項４】 該粉砕室は、該加速管出口を有する粉砕4. The pulverizing chamber has an accelerating tube outlet.
室前壁及び該衝突部材で粉砕された被粉砕物を衝突によThe object to be ground pulverized by the chamber front wall and the collision member is collided.
りさらに粉砕するための粉砕室側壁を有し、該粉砕室前A crushing chamber side wall for further crushing,
壁と該粉砕室側壁とが連設されていることを特徴とするCharacterized in that the wall and the side wall of the crushing chamber are connected to each other.
請求項１に記載の分級粉砕装置。The classification and crushing device according to claim 1.