JP3805321B2

JP3805321B2 - Classification device

Info

Publication number: JP3805321B2
Application number: JP2003138131A
Authority: JP
Inventors: 頼昭神垣
Original assignee: ケムコ商事株式会社
Priority date: 2003-05-16
Filing date: 2003-05-16
Publication date: 2006-08-02
Anticipated expiration: 2023-05-16
Also published as: JP2004337747A

Description

【０００１】
【発明が属する技術分野】
本発明は、砂利や砂、とりわけ砕石や砕砂などのコンクリート用の骨材（以下、単に「骨材」という）を洗浄して分級し、サイズによる選別を行う分級装置に関する。
【０００２】
【従来技術】
骨材を洗浄して骨材に付着する泥土を除去する洗浄装置、タンクに骨材と水を供給して沈積した骨材をスパイラルやレーキで搬出して取り出すと共に、沈降し切れない粒子を水と共に排出させる分級機、メッシュによる篩い分けを行ってサイズによる選別を行う選別機はそれぞれ知られており、洗浄と選別を行う装置も知られている。
【０００３】
下記特許文献１には、ドラム内周面に多数の送り板をドラム回転方向に対して３０°〜６０°の角度で傾斜させて突設し、排出口側に洗浄した骨材を掻き上げて排出口に排出する掬い上げ板を設けた洗浄用ドラムと、該ドラムの排出口に接続され、網状体又は多孔板からなる篩い部を１又は複数備えた分別用ドラムと、各ドラムを回転させる駆動装置と、洗浄用ドラム内に骨材と水を供給するフィーダよりなり、洗浄用ドラムの回転によりドラム内に供給された骨材は、送り板により排出口側に送られる間、送り板やドラム内周面との摩擦、衝突時における衝撃、骨材同士の摩擦や衝突による衝撃により、骨材に付着した泥土が除去され（除去された泥土は水により洗い流され、排出口側のドラム或いは排出口より排出される）、ついで排出口側で掬い上げ板により掻き上げられて排出口に排出されたのち、分別用ドラムでサイズによって分別されるようになっている。
【０００４】
【特許文献１】
特開２０００−１５７８９０号
【０００５】
【発明が解決しようとする課題】
上記特許文献１に開示される装置では、
（１）洗浄用ドラムに供給された水は、骨材から除去された泥土を洗い流すだけで分級は行っていない。
【０００６】
（２）骨材からの泥土の除去は、送り板、ドラム内周面、骨材同士の摩擦や衝突による衝撃により行っており、摩擦や衝撃だけでは骨材に付着した泥土の除去が不十分となりがちである。
（３）ドラム内での骨材の送りは、送り板によって行っているが、こうした送り板は骨材との摩擦や衝撃により損耗し易く、ドラムの構造を複雑にし、また送り板は不連続であるため、送り効率が悪い。
【０００７】
（４）泥土を洗い流した水は、ドラムや排出口の下側部より排出されている。
これに対し、本発明の第１の目的は、骨材の洗浄、分級、選別を一つの装置で行い、しかも骨材からの泥土の除去を十分に行うことができる分級装置を提供しようとするものであり、第２の目的は、骨材の送り装置の構造を簡単にして損耗箇所を少なくした分級装置を提供しようとするものである。
【０００８】
また本発明の第３の目的は、水の使用量をより少なくした分級装置を提供しようとするものである。
【０００９】
【課題の解決手段】
請求項１に係わる発明は、排水口を備え、排水口に達するレベルまで水が貯留されるタンクと、該タンク内に横向きをなして回転可能に配置され、メッシュの細かな網状体或いは多孔板よりなる第１の篩い部を備え、少なくとも下側部が排水口に達するレベルまで貯まるタンク内の水に漬かる洗浄ドラムと、該ドラムを回転させる駆動装置と、上記洗浄ドラム内に骨材或いは骨材と水を供給する供給手段と、上記第１の篩い部を通してタンク底に沈降するサイズの細かな骨材をタンク外に排出する排出手段と、上記洗浄ドラムの排出口に接続され、上記第１の篩い部よりメッシュの粗い網状体或いは多孔板よりなる第２の篩い部を有する選別ドラムと、上記洗浄ドラム内の骨材を排出口に送る送り手段とよりなる分級装置において、上記タンクが回転可能に支持されるドラムよりなって洗浄ドラムを回転させる駆動装置とは別の駆動装置により回転され、内部にはタンク底に溜まる骨材を送る螺旋翼が突設されることを特徴とし、
請求項２に係わる発明は、排水口を備え、排水口に達するレベルまで水が貯留されるタンクと、該タンク内に横向きをなして回転可能に配置され、メッシュの細かな網状体或いは多孔板よりなる第１の篩い部を備え、少なくとも下側部が排水口に達するレベルまで貯まるタンク内の水に漬かる洗浄ドラムと、該ドラムを回転させる駆動装置と、上記洗浄ドラム内に骨材或いは骨材と水を供給する供給手段と、上記第１の篩い部を通してタンク底に沈降するサイズの細かな骨材をタンク外に排出する排出手段と、上記洗浄ドラムの排出口に接続され、上記第１の篩い部よりメッシュの粗い網状体或いは多孔板よりなる第２の篩い部を有する選別ドラムと、上記洗浄ドラム内の骨材を排出口に送る送り手段とよりなる分級装置において、タンクが洗浄ドラムと逆向きに回転されることを特徴とする。
【００１０】
請求項１及び２に係わる発明によると、洗浄ドラムの回転によりドラム内の骨材が水に漬かった状態で互いに擦られたり、ぶつかったりすることにより、また一部の骨材が水面上に露出する場合には、洗浄ドラムの回転に伴い崩れ落ちる骨材が水面に当たることにより、更には波立つ水面でじゃぶじゃぶ洗われることにより、骨材に付着する泥土が十分に除去されるようになり、沈降し切れない粒子は水と共に排出口より排出されるようになる。
【００１１】
また請求項１に係わる発明においては、タンク底に溜まる泥土や骨材が確実に螺旋送りされるようになり、請求項２に係わる発明においては、タンクと洗浄ドラムが互いに逆向きに回転することによりタンク内の水の動きが激しくなり、骨材に付着する泥土が除去され易くなる。
【００１２】
また上記各発明によると、骨材は、第１の篩い部を通って篩い分けられるサイズのものと、第２の篩い部を通って篩い分けられるサイズのものと、第２の篩い部によっても篩い分けされないサイズのものとに選別されるようになる。したがって上記各発明によると、骨材の洗浄、分級、選別が一つの装置で行えるようになる。なお、選別に関しては、選別ドラムに第２の篩い部のほか該篩い部よりメッシュの粗い網状体或いは多孔板よりなる第３の篩い部、更には第４、第５の篩い部を設けて骨材のサイズを更に選別できるようにすることもできる。
【００１３】
上記各発明の供給手段は、骨材或いは骨材と水がドラム内に供給できるようなものであればよく、とくに制限はないが、敢えて例示すれば以下の実施形態に示されるようなシュート状のフィーダが挙げられる。
【００１４】
排出手段も例えばタンク底に溜まる骨材を掻き取り板により掻き取る方法、タンク底を傾斜させて骨材を自重により移動させる方法、以下の実施形態に示されるようにタンクに螺旋翼を突設してタンクを回転させ、骨材を螺旋送りする方法、タンクに特許文献１に示されるような送り板を突設し、タンクを回転させることにより骨材を送る手段等と、この手段によって集められた骨材を掻き上げてタンク外に排出させる掻き上げ板やバケットよりなるものなど、タンク底に溜まる骨材を排出できるものであればどのようなものでもよい。
【００１５】
送り手段についても、例えば洗浄ドラムを傾斜させて骨材を自重により移動させる方法、洗浄ドラムに螺旋翼或いは特許文献１に開示されるような送り板を突設して洗浄ドラムの回転により送る手段等と、この手段によって集められた骨材を掻き上げて排出口に排出させる掻き上げ板やバケットよりなるものなど、洗浄ドラム内の骨材をドラム内で移動させて排出口に送ることができるようなものであればどのようなものでもよい。
【００１６】
請求項３に係わる発明は、第２の目的を達成する分級装置に関するもので、請求項１又は２に係わる発明において、洗浄ドラムが排出口を下向きにして傾斜することを特徴とする。この場合、送り手段は傾斜した洗浄ドラムとなる。
【００１７】
本発明によると、洗浄ドラム内に例えば螺旋翼や送り板のような骨材を送るためのものが必要でないため、洗浄ドラムの構成が簡単となり、損耗を生ずる箇所も少なくなる。
【００１８】
なお、請求項３に係わる発明は、請求項１又は２に係わる発明の横向きをなす洗浄ドラムを傾斜させた点に限定したものである。したがって請求項１又は２に係わる発明の横向きをなす洗浄ドラムは、傾斜した洗浄ドラムを含むものとなる。
【００１９】
好ましい発明では、洗浄ドラム内に螺旋翼を突設して骨材が螺旋送りされる
本発明によると、螺旋翼は連続形成されるため洗浄ドラムの回転により骨材を連続送りすることができ、特許文献１に開示される送り板に比べ、送り効率が向上する。
【００２０】
請求項４に係わる発明は、第３の目的を達成する分級装置に関するもので、請求項１ないし３に係わる発明において、排出口に排出される骨材の水切りがタンク内で行われることを特徴とする。
【００２１】
特許文献１に開示されるように、排水が洗浄用ドラムの下側部から行われるようになっていると、泥土を洗い流すのに必要な水が全て排出されるようになるが、本発明のように排水が排水口から溢れ出ることにより行われるようにすれば、排水量を分級に必要な量だけに制限することができ、水の使用量が少なくてすむ。
【００２２】
【発明の実施の形態】
図１は、本発明に係わる分級装置について示すもので、回転可能に支持されて一側に排水口１を備え、駆動装置１０により回転する円筒形のドラムよりなるタンク２と、タンク２内に排出口側を斜め下向きにして回転可能に支持され、前後に設けた駆動装置３ａ、３ｂにより回転する円筒形の洗浄ドラム４と、洗浄ドラム４の排出口に接続される選別ドラム５と、洗浄ドラム内に骨材と水を供給する供給手段としてのシュート状のフィーダ６とよりなり、タンク２内には螺旋翼７が突設され、タンク２の回転によりタンク底部に溜まる泥土や骨材が螺旋送りされ、排出口側に送られるようになっている。
【００２３】
タンク２の排出口側には図２に示すように、バケット８が円周方向に定間隔で内向きに突出されると共に、排出シュート９が配置され、タンク２の回転により排出口側に送られた骨材をバケット８で掬い取って排出シュート上まで運び、排出シュート９に投下して排出させるようになっている。なお、バケット８には図示していないが水切り孔が設けられ、骨材を排出シュート上まで運ぶ間に骨材の水切りを行うようになっており、したがって排出シート９には水切りをされた骨材が排出されるようになっている。
【００２４】
タンク２を回転させる駆動装置１０は、図３に示すように、向かい合わせに配置され、タンク２が載置されるコロ１１と、各コロ１１をチェーン伝動機構１２を介して回転駆動するモータ１３とよりなり、各モータ１３でコロ１１を図３の矢印方向に回転駆動することによりタンク２がコロ上を転動して矢印方向に回転するようになっている。
【００２５】
洗浄ドラム４は、環状をなす側板１５ａ、１５ｂと断面Ｔ形をなして円周上に一定間隔で配置され、両側板１５ａ、１５ｂを連結する連結板１６と、各連結板１６間に円周上に沿うように配設されて環状をなし、無数の小孔を備えた多孔板１７と、入り側の側板１５ａに固着され、フィーダ６が差し込まれる筒状の入口１８と、連結板１６と一体をなし、出側の側壁１５ｂに挿入される選別ドラム５の挿入部分と洗浄ドラム４とを連結する多孔状の掻き上げ板１９とよりなっており、多孔板１７は第１の篩い部を構成し、また、洗浄ドラム４を回転させる駆動装置３ａ、３ｂはタンク２を回転させる上述の駆動装置と同様に構成され、入口１８と、掻き上げ板１９を介して洗浄ドラム４と一体に連結される選別ドラム５を回転可能に支持して、洗浄ドラム４を図３に示すように、タンク２とは逆向きに回転させるようになっている。
【００２６】
選別ドラム５は、洗浄ドラム４への挿入部分に投入口２１を掻き上げ板１９に近接して形成し、洗浄ドラム４の回転に伴い掻き上げ板１９で掻き上げられた骨材が選別ドラム内に投入されるようになっている。
【００２７】
選別ドラム５はまた、図１に示すように出側に上記多孔板１７に比べ孔のサイズが大きな多孔板よりなる第２の篩い部２３を有している。必要によっては選別ドラム５に第２の篩い部２３のほかに孔のサイズが更に大きな多孔板よりなる第３ないし第４の篩い部を設けることもできる。
【００２８】
本装置は以上のように構成され、骨材の洗浄、分級及び選別は次のようにして行われる。
タンク２内には、排水口１に達するレベルまで水が貯められており、洗浄ドラム４は下側部が水に浸けられ、水に浸かる部分は排出口側に向かう程深くなっている。タンク２と洗浄ドラム４は、図３に示すように逆向きに回転されており、こうした状態で洗浄ドラム４内にフィーダ６により骨材と水が供給される。
【００２９】
洗浄ドラム内に供給された骨材は、洗浄ドラム４の回転により更には内向きに突出する連結板１６によっても掻き上げられながら混ぜ合わされ、排出口側に向かって移動している。この間、水に浸かり、或いは水面上に露出する骨材同士が、更にはまた連結板１６とぶつかったり、擦られたりし、また水面上の骨材が洗浄ドラム４の回転により崩れ落ちて水面に当たったり、波立つ水面でじゃぶじゃぶ洗われることにより骨材に付着する泥土が洗浄除去される。除去された泥土は骨材の細かな粒子と共に第１の篩いである多孔板１７で篩い落され、タンク底部に沈降するが、沈降し切れない粒子は、排水口１より溢れ出る水と共に排出される。タンク底部に沈降した泥土や骨材の細かな粒子はタンク２の回転に伴い、螺旋翼７により螺旋送りされ、排出口側に移動する。そして図２に示すように、排出口側においてバケット８により掬い取られ、排出シュート９上まで運んで（この間、バケット８の水切り孔により水切りされる）、排出シュート９に投下され、排出される。
【００３０】
一方、洗浄ドラム４の回転に伴い排出口側に移動した洗浄後の骨材は、掻き上げ板１９により掻き上げられ、水面上に掻き上げられて水切りされたのち投入口２１より選別ドラム５内に投下される。その後、選別ドラム５の回転に伴い傾斜した選別ドラム５に沿い移動して第２の篩い部２３でサイズの比較的小さな骨材を篩い落す。篩い落されなかったサイズの比較的大きな骨材は選別ドラム端より排出される。
以上のようにして洗浄ドラム４内に供給された骨材の洗浄、分級、選別が行われる。
【００３１】
【発明の効果】
請求項１及び２に係わる発明によると、骨材が水に浸かった状態で、或いはまた一部の骨材が水面に露出した状態で混ぜ合わせられることにより、骨材に付着する泥土が十分に除去されるようになること、除去された泥土は、第１の篩い部を通して骨材の細かな粒子と共に、タンク底に沈降するが、沈降し切れない粒子は排水口より水と共に排出される。こうした分級と第１及び第２の篩い部による骨材の選別により一台の装置で、洗浄、分級、選別が行われること等の効果を奏し、更に請求項１に係わる本発明においては、タンク底に溜まる泥土や骨材の排出送りが確実に行えるようになり、請求項２に係わる発明によると、タンクと洗浄ドラムを逆向きに回転させることによりタンク内の水の動きが激しくなり、骨材に付着する泥土の除去がより確実に行えるようになる。
【００３２】
請求項３に係わる発明によると、洗浄ドラム内に骨材を送るための装置、例えば螺旋翼や送り板などが必要でないため洗浄ドラムの構成が簡単となり、骨材を送る装置の損耗も生ずることがない。
【００３３】
請求項４に係わる発明によると、水切りはタンク内で行われ、しかも水の排出は主として分級のため排出口より溢れ出るものだけとなるから、水の使用量が少なくてすむ。
【図面の簡単な説明】
【図１】本発明に係わる分級装置の断面図。
【図２】図１のＡ−Ａ線概略断面図。
【図３】図１のＢ−Ｂ線概略断面図。
【符号の説明】
１・・排水口
２・・タンク
３ａ、３ｂ・・駆動装置
４・・洗浄ドラム
５・・選別ドラム
６・・フィーダ
７・・螺旋翼
８・・バケット
９・・排出シュート
１１・・コロ
１３・・モータ
１６・・連結板
１７・・多孔板
１８・・入口
１９・・掻き上げ板
２１・・投入口
２３・・第２の篩い部[0001]
[Technical field to which the invention belongs]
The present invention relates to a classification device that cleans and classifies aggregate aggregate for concrete such as gravel and sand, especially crushed stone and crushed sand (hereinafter simply referred to as “aggregate”), and sorts them by size.
[0002]
[Prior art]
A cleaning device that cleans the aggregate and removes mud adhering to the aggregate, supplies aggregate and water to the tank, removes the aggregate that has been deposited by a spiral or rake, and removes particles that cannot settle. In addition, there are known a classifier to be discharged together and a sorter that performs sorting by size by sieving with a mesh, and an apparatus that performs washing and sorting is also known.
[0003]
In Patent Document 1 below, a large number of feed plates are inclined on the drum inner peripheral surface at an angle of 30 ° to 60 ° with respect to the drum rotation direction, and the washed aggregate is scraped up to the discharge port side. A cleaning drum provided with a scooping plate for discharging to the discharge port, a separation drum connected to the discharge port of the drum and provided with one or a plurality of sieving parts made of a mesh or a perforated plate, and each drum being rotated It consists of a drive unit and a feeder that supplies aggregate and water into the cleaning drum. While the aggregate supplied to the drum by the rotation of the cleaning drum is sent to the discharge port side by the feed plate, Mud attached to the aggregate is removed by friction with the drum inner surface, impact at the time of collision, friction between the aggregates and impact by collision (the removed mud is washed away with water, and the drum on the outlet side or Discharged from the outlet), and then the outlet After being scooped up by a scooping plate on the side and discharged to a discharge port, it is sorted by size with a sorting drum.
[0004]
[Patent Document 1]
JP 2000-157890 A
[Problems to be solved by the invention]
In the apparatus disclosed in Patent Document 1,
(1) The water supplied to the washing drum is merely classified by washing away the mud removed from the aggregate.
[0006]
(2) The removal of mud from the aggregate is done by impact caused by friction or collision between the feed plate, the drum inner peripheral surface and the aggregate, and the removal of the mud adhering to the aggregate is not sufficient only by friction or impact. It tends to be a neighbor.
(3) Aggregate feed in the drum is performed by a feed plate, but such a feed plate is easily worn by friction and impact with the aggregate, complicates the drum structure, and the feed plate is discontinuous. Therefore, feeding efficiency is bad.
[0007]
(4) The water from which the mud has been washed out is discharged from the lower part of the drum and outlet.
On the other hand, the first object of the present invention is to provide a classifying device that performs washing, classification, and sorting of aggregates with a single device and that can sufficiently remove mud from the aggregate. The second object of the present invention is to provide a classifying apparatus in which the structure of the aggregate feeding device is simplified and the number of wear points is reduced.
[0008]
The third object of the present invention is to provide a classifier that uses less water.
[0009]
[Means for solving problems]
The invention according to claim 1 is provided with a drain port, in which water is stored up to a level reaching the drain port, and is arranged in the tank so as to be rotatable in a horizontal direction, and a fine mesh body or perforated plate with a mesh A cleaning drum that is soaked in water in a tank that has at least a lower side portion that reaches a drainage outlet, a driving device that rotates the drum, and an aggregate or bone in the cleaning drum. A supply means for supplying the material and water, a discharge means for discharging fine aggregate of a size that settles to the bottom of the tank through the first sieving section, and a discharge port of the cleaning drum. a sorting drum having a second sieve portion made of coarse mesh body or a perforated plate mesh than one sieve unit, in a more composed classifier and feeding means for feeding the outlet of the aggregate in the washing drum, the Tan It is constituted by a drum that is rotatably supported and is rotated by a driving device that is different from the driving device that rotates the cleaning drum, and a spiral blade that feeds aggregate accumulated in the tank bottom is projected inside. ,
The invention according to claim 2 is provided with a drainage port, in which water is stored up to a level reaching the drainage port, and is arranged in the tank so as to be rotatable in a horizontal direction and has a fine mesh or a perforated plate. A cleaning drum that is soaked in water in a tank that has at least a lower side portion that reaches a drainage outlet, a driving device that rotates the drum, and an aggregate or bone in the cleaning drum. A supply means for supplying the material and water, a discharge means for discharging fine aggregate of a size that settles to the bottom of the tank through the first sieving section, and a discharge port of the cleaning drum. a sorting drum having a second sieve portion made of coarse mesh body or a perforated plate mesh than one sieve unit, in a more composed classifier and feeding means for feeding the outlet of the aggregate in the washing drum, tank Characterized in that it is rotated in the purification drum and opposite.
[0010]
According to the first and second aspects of the present invention, the aggregate in the drum is rubbed or collided with each other in a state where the aggregate is immersed in water by the rotation of the cleaning drum, and a part of the aggregate is exposed on the water surface. When the cleaning drum rotates, the aggregate that collapses with the rotation of the washing drum hits the surface of the water, and further washed with undulating water, so that the mud adhering to the aggregate is sufficiently removed and settled. Unbreakable particles are discharged from the outlet along with water.
[0011]
In the invention according to claim 1, the mud and aggregate accumulated in the tank bottom are surely spirally fed. In the invention according to claim 2, the tank and the cleaning drum rotate in opposite directions. As a result, the movement of water in the tank becomes intense, and the mud adhering to the aggregate is easily removed.
[0012]
Further , according to each of the above inventions, the aggregate is also sized by sieving through the first sieving part, sized by sieving through the second sieving part, and by the second sieving part. Sorted into non-sieved sizes. Therefore, according to each of the above inventions, the aggregate can be cleaned, classified, and selected with a single device. Regarding the sorting, the sorting drum is provided with a second sieve portion, a third sieve portion made of a mesh or a perforated plate having a coarser mesh than the sieve portion, and further a fourth and fifth sieve portion. It is also possible to further select the size of the material.
[0013]
The supply means of each of the above inventions is not particularly limited as long as aggregate or aggregate and water can be supplied into the drum. Can be mentioned.
[0014]
For example, the discharging means is a method of scraping the aggregate accumulated in the tank bottom with a scraping plate, a method of moving the aggregate by its own weight by inclining the tank bottom, and a spiral wing protruding from the tank as shown in the following embodiment Then, the tank is rotated, the aggregate is spirally fed, the feed plate as shown in Patent Document 1 is projected on the tank, and the aggregate is fed by rotating the tank. Any material may be used as long as it can discharge the aggregate accumulated in the tank bottom, such as a scraping plate or a bucket that scrapes the collected aggregate and discharges it outside the tank.
[0015]
As for the feeding means, for example, a method in which the washing drum is inclined and the aggregate is moved by its own weight, and a feeding blade as disclosed in Patent Document 1 is provided on the washing drum so as to be fed by rotation of the washing drum. The aggregate in the cleaning drum, such as a scraping plate or bucket that scrapes the aggregate collected by this means and discharges it to the discharge port, can be moved in the drum and sent to the discharge port Any thing is acceptable.
[0016]
The invention according to claim 3 relates to a classifying device that achieves the second object. In the invention according to claim 1 or 2 , the cleaning drum is inclined with the discharge port facing downward. In this case, the feeding means is an inclined cleaning drum.
[0017]
According to the present invention, since there is no need to feed aggregate such as a spiral blade or a feed plate into the cleaning drum, the configuration of the cleaning drum is simplified and the number of places where wear occurs is reduced.
[0018]
Note that the invention according to claim 3 is limited to the point that the cleaning drum that forms the horizontal direction of the invention according to claim 1 or 2 is inclined. Accordingly, the lateral cleaning drum of the invention according to claim 1 or 2 includes an inclined cleaning drum.
[0019]
In the preferred invention, according to the present invention in which the spiral blade is provided in the cleaning drum and the aggregate is spirally fed, the spiral blade is continuously formed, so that the aggregate can be continuously fed by the rotation of the cleaning drum, Compared with the feed plate disclosed in Patent Document 1, the feed efficiency is improved.
[0020]
The invention according to claim 4 relates to a classification device that achieves the third object. In the invention according to claims 1 to 3 , the aggregate drained to the discharge port is drained in the tank. And
[0021]
As disclosed in Patent Document 1, when the drainage is performed from the lower side of the washing drum, all the water necessary for washing off the mud is discharged. Thus, if the drainage is performed by overflowing the drainage port, the amount of drainage can be limited to only the amount necessary for classification, and the amount of water used can be reduced.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a classification apparatus according to the present invention. A tank 2 comprising a cylindrical drum that is rotatably supported and has a drain port 1 on one side and is rotated by a driving device 10, and a tank 2. A cylindrical cleaning drum 4 that is rotatably supported with the discharge port side obliquely downward and rotated by front and rear driving devices 3a and 3b, a sorting drum 5 connected to the discharge port of the cleaning drum 4, and a cleaning It consists of a chute-like feeder 6 as a supply means for supplying aggregate and water into the drum. A spiral blade 7 projects from the tank 2 so that mud and aggregate accumulated at the bottom of the tank as the tank 2 rotates. It is spirally fed and sent to the outlet side.
[0023]
As shown in FIG. 2, the bucket 8 protrudes inward in the circumferential direction at regular intervals on the discharge port side of the tank 2, and a discharge chute 9 is disposed, and is sent to the discharge port side by the rotation of the tank 2. The aggregate thus obtained is picked up by the bucket 8 and carried to the discharge chute and dropped on the discharge chute 9 for discharge. Although not shown, the bucket 8 is provided with a draining hole so that the aggregate is drained while the aggregate is being transported onto the discharge chute. Therefore, the drained bone is drained on the discharge sheet 9. The material is discharged.
[0024]
As shown in FIG. 3, the driving device 10 that rotates the tank 2 is arranged face to face, and a roller 11 on which the tank 2 is placed, and a motor 13 that rotationally drives each roller 11 via a chain transmission mechanism 12. By rotating the roller 11 in the direction of the arrow in FIG. 3 with each motor 13, the tank 2 rolls on the roller and rotates in the direction of the arrow.
[0025]
The cleaning drum 4 has a T-shaped cross section with the annular side plates 15a and 15b and is arranged on the circumference at regular intervals. The cleaning plate 4 connects the side plates 15a and 15b, and the circumference between the connection plates 16. A perforated plate 17 arranged in an annular shape and having an infinite number of small holes, a cylindrical inlet 18 fixed to the entrance side plate 15a and into which the feeder 6 is inserted, and a connecting plate 16 The perforated plate 17 is composed of a porous scraping plate 19 that connects the cleaning drum 4 and the insertion portion of the sorting drum 5 inserted into the outlet side wall 15b. The driving devices 3 a and 3 b configured to rotate the cleaning drum 4 are configured in the same manner as the driving device described above that rotates the tank 2, and are integrally connected to the cleaning drum 4 via the inlet 18 and the scraping plate 19. Supporting the sorting drum 5 to be rotatable Washing drum 4 as shown in FIG. 3, and is adapted to rotate in the opposite direction to the tank 2.
[0026]
In the sorting drum 5, an insertion port 21 is formed in the insertion portion of the cleaning drum 4 in the vicinity of the scraping plate 19, and the aggregate scraped up by the scraping plate 19 with the rotation of the cleaning drum 4 is contained in the sorting drum 5. It is to be thrown into.
[0027]
As shown in FIG. 1, the sorting drum 5 also has a second sieving portion 23 made of a porous plate having a larger hole size than the porous plate 17 on the outlet side. If necessary, in addition to the second sieving part 23, the sorting drum 5 may be provided with third to fourth sieving parts made of a perforated plate having a larger hole size.
[0028]
The present apparatus is configured as described above, and the cleaning, classification and sorting of the aggregate are performed as follows.
In the tank 2, water is stored up to a level reaching the drain port 1, and the lower part of the cleaning drum 4 is immersed in water, and the portion immersed in water becomes deeper toward the discharge port side. As shown in FIG. 3, the tank 2 and the cleaning drum 4 are rotated in opposite directions, and in this state, aggregate and water are supplied into the cleaning drum 4 by the feeder 6.
[0029]
The aggregate supplied into the cleaning drum is mixed while being scraped up by the connecting plate 16 protruding further inward by the rotation of the cleaning drum 4, and moves toward the discharge port side. During this time, the aggregates immersed in the water or exposed on the surface of the water collide with or rub against the connecting plate 16, and the aggregate on the surface of the water collapses by the rotation of the cleaning drum 4 and hits the surface of the water. Or, mud soil adhering to the aggregate is washed away by being washed on the rippling water surface. The removed mud is screened together with the fine particles of the aggregate by the perforated plate 17 which is the first sieve, and settles to the bottom of the tank, but the particles that cannot be settled are discharged together with the water overflowing from the drain port 1. The The fine particles of mud and aggregate that have settled at the bottom of the tank are spirally fed by the spiral blade 7 as the tank 2 rotates and move to the discharge port side. Then, as shown in FIG. 2, it is scooped up by the bucket 8 on the discharge port side, carried to the discharge chute 9 (while being drained by the drain hole of the bucket 8), dropped into the discharge chute 9, and discharged. .
[0030]
On the other hand, the aggregate after cleaning moved to the discharge port side with the rotation of the cleaning drum 4 is scraped up by the scraping plate 19, scraped up on the water surface and drained, and then into the sorting drum 5 from the inlet 21. Dropped. After that, as the sorting drum 5 rotates, it moves along the sorting drum 5 that is inclined, and the second sieving portion 23 sifts out a relatively small aggregate. The relatively large aggregate that has not been sieved out is discharged from the end of the sorting drum.
As described above, the aggregate supplied to the cleaning drum 4 is cleaned, classified, and selected.
[0031]
【The invention's effect】
According to the invention according to claims 1 and 2 , the mud adhered to the aggregate is sufficiently obtained by mixing the aggregate in a state where the aggregate is immersed in water, or in a state where a part of the aggregate is exposed to the water surface. The removed mud is settled to the tank bottom along with the fine particles of the aggregate through the first sieving portion, but the particles that cannot be settled are discharged together with water from the drain outlet. In this classification a single apparatus by selection of aggregate according to the first and second sieve portion, washed, classified, and bring out the effects of such that the sorting is carried out, in the present invention further related to claim 1, According to the invention according to claim 2, the movement of water in the tank becomes intense by rotating the tank and the washing drum in the opposite direction. The removal of mud adhering to the aggregate can be performed more reliably.
[0032]
According to the invention according to claim 3 , since the device for feeding the aggregate into the washing drum, for example, the spiral blade and the feed plate is not necessary, the construction of the washing drum becomes simple, and the wear of the device for feeding the aggregate also occurs. There is no.
[0033]
According to the fourth aspect of the invention, draining is performed in the tank, and water is discharged mainly because it is classified so as to overflow from the discharge port, so that the amount of water used can be reduced.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a classification device according to the present invention.
FIG. 2 is a schematic cross-sectional view taken along line AA in FIG.
3 is a schematic cross-sectional view taken along line BB in FIG.
[Explanation of symbols]
1. ・ Drain port 2 ・ Tank 3a, 3b ・ Driver 4 ・ Cleaning drum 5 ・ Selector drum 6 ・ Feeder 7 ・ Helix blade 8 ・ Bucket 9 ・ Discharge chute 11 ・ roller 13 ・-Motor 16-Connection plate 17-Perforated plate 18-Entrance 19-Scooping plate 21-Loading port 23-Second sieving section

Claims

A tank provided with a drain port, in which water is stored up to a level reaching the drain port, and a first sieving portion which is arranged in the tank so as to be rotatable in a horizontal direction and is made of a fine mesh or a perforated plate of mesh A cleaning drum that is immersed in water in a tank that is stored to a level at which the lower side reaches the drain outlet, a drive device that rotates the drum, and a supply means for supplying aggregate or aggregate and water into the cleaning drum And a discharging means for discharging fine aggregate of a size settling to the bottom of the tank through the first sieving portion to the outside of the tank, and a discharge port of the cleaning drum, and having a coarser mesh than the first sieving portion. a sorting drum having a second sieve portion made of mesh material or perforated plate, in a more composed classifier and feeding means for feeding the outlet of the aggregate in the washing drum, the tank is supported rotatably The driving device for rotating the washing drum consist ram is rotated by a separate drive unit, a classification apparatus, wherein a helical blade Send aggregate accumulated in the tank bottom to the inside is projected.

A tank provided with a drain port, in which water is stored up to a level reaching the drain port, and a first sieving portion which is arranged in the tank so as to be rotatable in a horizontal direction and is made of a fine mesh or a perforated plate of mesh A cleaning drum that is immersed in water in a tank that is stored to a level at which the lower side reaches the drain outlet, a drive device that rotates the drum, and a supply means for supplying aggregate or aggregate and water into the cleaning drum And a discharging means for discharging fine aggregate of a size settling to the bottom of the tank through the first sieving portion to the outside of the tank, and a discharge port of the cleaning drum, and having a coarser mesh than the first sieving portion. rotation and sorting drum having a second sieve portion made of mesh material or perforated plate, in a more composed classifier and feeding means for feeding the outlet of the aggregate in the washing drum, tank to the cleaning drum and opposite Classifying device which is characterized in that.

3. The classifier according to claim 1, wherein the cleaning drum is inclined with the discharge port facing downward.

The classification device according to any one of claims 1 to 3 , wherein drainage of the aggregate discharged to the discharge port is performed in a tank.