JP3557602B2

JP3557602B2 - Rotary kiln sealing device

Info

Publication number: JP3557602B2
Application number: JP34859899A
Authority: JP
Inventors: 昇岩田; 一州鉄山; 泰仁鴻上
Original assignee: Sumitomo Heavy Industries Ltd
Current assignee: Sumitomo Heavy Industries Ltd
Priority date: 1999-12-08
Filing date: 1999-12-08
Publication date: 2004-08-25
Anticipated expiration: 2019-12-08
Also published as: JP2001165579A

Description

【０００１】
【発明の属する技術分野】
本発明は、一端側の開口から投入された被処理物を他端側に移動させつつ溶融して他端側の開口から溶融スラグや排出ガスを排出する構造を持つロータリーキルンに適したシール装置に関する。
【０００２】
【従来の技術】
一般に、ロータリーキルンは、その両端が開口となっており、それぞれの開口にはフードを介して他の設備が設けられる。他の設備としては、例えばロータリーキルンの一端側（入側とする）には被処理物投入設備が設けられ、他端側（出側とする）には二次燃焼塔が設けられる。二次燃焼塔は通常、ロータリーキルンから排出されるガスを集めて再燃焼させたり、排ガスを無害化する設備と、排出される溶融スラグを外部に搬出する設備とを含む。
【０００３】
いずれにしても、このようなロータリーキルンにおいては、その内部と外気とが連通すると、キルン内部の温度、圧力、あるいは酸素濃度等が変化し、燃焼条件が変動してしまう。このため、ロータリーキルンとフードとの間には、シール装置が設けられる。このシール装置は、運転中は回転しているロータリーキルンと常に固定状態にあるフードとの間に介在してシールを行う必要がある。
【０００４】
このようなシール装置の例が例えば、特開平６−２８１３４８号公報に示されている。このシール装置は、ロータリーキルン本体とフードとの回転接続部におけるシール装置であり、ロータリーキルン本体と共に回転する回転部と回転しない固定部とを具備している。
【０００５】
前記回転部は、ロータリーキルン本体に溶着された受座と、前記受座にロータリーキルン本体の円周方向及び軸方向に所定の間隔をもって溶着されたガイドピンと、前記受座の受座面を滑動できるように設けられた柔軟性を有するシール材と、それぞれＨ形断面を有するリング状で且つ円周方向に複数分割され、その分割位置が互いに位相をもって並置されている２個以上のシール保持部材と、前記シール保持部材の外周先端部の内面に締着されているチップリングと、前記シール保持部材の分割毎の円周方向中心に、前記ガイドピンを挟み、前記シール保持部材に溶着されたブラケットと、前記シール保持部材の横材の外周面に、複数分割して載置され、各端面間が調整ボルトを有するコイルばねで連結されているコイルばね付バンドとを具備している。
【０００６】
一方、前記固定部は、ロータリーキルンのフード側先端部付近の基礎に固定された固定台と、前記固定台に固着された固定リングと、前記固定リングに締着されたカバーリングと、前記カバーリングの内周の、前記シール保持部材の溝部に相対する位置に溶着された断面Ｉ形状のチップリング保持部材と、前記チップリング保持部材の両面先端部に締着されたチップリングとを具備している（詳しくは、上記公報参照）。
【０００７】
【発明が解決しようとする課題】
しかしながら、上記のシール装置は、Ｈ形断面を持つシール保持部材においてラビリンスを形成するようにしてシールを実現する構造であるため、構造が複雑となる問題点がある。
【０００８】
そこで、本発明の課題は、ロータリーキルンの開口部とフードとの間のシールをラビリンスによらない比較的簡単な構造で実現できるロータリーキルンのシール装置を提供することにある。
【０００９】
【課題を解決するための手段】
本発明は、少なくとも一端側を開口としたロータリーキルンの該開口側の端部にシール装置を介してフードを設けて成るロータリーキルンに適用され、前記シール装置は、ロータリーキルン側に設けられたリング状の可動側シール受け板と、該可動側シール受け板にギャップを介して対向するように前記フード側に設けられたリング状の固定側シール受け板と、前記可動側シール受け板と前記固定側シール受け板とに当接するように設けられて前記ギャップを塞いでいるリング状のシール部材と、該シール部材を前記ロータリーキルンの中心方向に向けて付勢する付勢手段とを含み、前記シール部材は周方向に関して分割された複数の分割シール部材から成り、前記付勢手段は、前記フード側に回動自在に軸支されて一端が前記分割シール部材に接しているレバーと、該レバーの他端側を前記一端が前記分割シール部材を押圧するように付勢するばね部材とから成る付勢機構が前記分割シール部材毎に設けられて成ることを特徴とする。
【００１０】
本シール装置においては、前記分割シール部材毎に設けられる前記付勢機構は、互いに隣接し合う２つの分割シール部材毎に対をなすように設けられ、対をなす付勢機構は、それぞれのレバーの前記一端側が互いに離れる方向に延在するように設けられ、かつそれぞれのレバーの前記他端側の間にコイルばねを介在させることによりそれぞれのレバーの前記一端が前記分割シール部材を押圧するように付勢される。
【００１１】
本シール装置においてはまた、前記固定側シール受け板と前記可動側シール受け板が約９０度に近い角度を形成するように設けられ、前記分割シール部材は前記角度に対応する断面略Ｖ字形状を持つ。
【００１２】
本シール装置においては更に、互いに隣接し合う前記分割シール部材の継ぎ目が断面略Ｖ字形状を持つカバー板でカバーされ、該カバー板の一端側のみを前記分割シール部材に固定している。
【００１３】
本発明によればまた、ロータリーキルン側に設けられたリング状の可動側シール受け板と、該可動側シール受け板にギャップを介して対向するように前記フード側に設けられたリング状の固定側シール受け板と、前記可動側シール受け板と前記固定側シール受け板とに当接するように設けられて前記ギャップを塞いでいるリング状のシール部材と、該シール部材を前記ロータリーキルンの中心方向に向けて付勢する付勢手段とを含み、前記シール部材は周方向に関して分割された複数の分割シール部材から成り、前記付勢手段は、互いに隣接し合う前記分割シール部材の両方にわたるように設けられて互いに隣接し合う前記分割シール部材の間を塞いでいるカバー板と、前記フード側に回動自在に軸支されて一端が前記カバー板に接しているレバーと、該レバーの他端側を前記一端が前記カバー板を押圧するように付勢するばね手段とから成る付勢機構が前記互いに隣接し合う分割シール部材毎に設けられて成ることを特徴とするロータリーキルンのシール装置が提供される。
【００１４】
【発明の実施の形態】
以下に、図面を参照して本発明によるロータリーキルンのシール装置の実施の形態について説明する。図１を参照して、ロータリーキルン１０の出側における端部にシール装置２０を介してフード３０が設けられている。ロータリーキルン１０の入側における端部にも同様なシール装置が設けられることは言うまでも無く、以下では出側のシール装置２０について説明する。
【００１５】
図２、図３をも参照して、シール装置２０は、ロータリーキルン１０の周囲に設けられた筒状の支持体１１に固定されたリング状の可動側シール受け板２１と、可動側シール受け板２１にギャップを介して対向するようにフード３０側に設けられたリング状の固定側シール受け板２２と、可動側シール受け板２１と固定側シール受け板２２とに接するように設けられて前記ギャップを塞いでいるリング状のシール部材２３と、シール部材２３をロータリーキルン１０の中心方向に向けて付勢する付勢装置とを含む。かくして、ロータリーキルン１０とフード３０の間の隙間は支持体１１とシール装置２０とにより完全に塞がれる。
【００１６】
なお、可動側シール受け板２１、固定側シール受け板２２はそれぞれ、周方向に関して複数に分割された分割部材から成り、鉄あるいはステンレス等の材料で作られる。シール部材２３は鉄等の耐熱性材料で作られている。
【００１７】
本形態では、シール部材２３も周方向に関して１２個に分割された分割シール部材２３−１から成り、付勢装置は各分割シール部材２３−１に対応するように設けられた１２個の付勢機構２４から成る。各付勢機構２４は、フード３０側に回動自在に軸支されてその一端が分割シール部材２３−１に接しているレバー２４−１と、レバー２４−１の他端側を前記一端が分割シール部材２３−１を押圧するように付勢するばね部材２４−２とから成る。詳しく言えば、各付勢機構２４は、互いに隣接し合う２つの分割シール部材２３−１毎に対をなすように設けられ、対をなす付勢機構２４は、それぞれのレバー２４−１の前記一端側が互いに離れる方向に延在するように設けられ、かつそれぞれのレバー２４−１の前記他端側の間に開きコイルばねによるばね部材２４−２を介在させることによりそれぞれのレバー２４−１の前記一端が分割シール部材２３−１を押圧するように付勢されている。
【００１８】
図４は分割シール部材２３−１を示しており、図５は分割シール部材２３−１とレバー２４−１との関係を示している。ここでは、分割シール部材２３−１の中央部に断面Ｕ字形状の連結部材２３−２が溶接等により固定されており、この連結部材２３−２のＵ字形状部内にレバー２４−１の一端が回動可能に軸支される。
【００１９】
本形態では、固定側シール受け板２２を設けるために、フード３０の端面には断面Ｌ形状を持つリング状の板部材２５が溶接等により取り付けられ、この板部材２５にリング状の板部材２６がボルト等により取り付けられている。そして、板部材２６におけるロータリーキルン側の端面に固定側シール受け板２２が溶接等により取り付けられている。
【００２０】
なお、板部材２６は、ここでは図６に示すように、周方向に６つに分割された６枚の分割板部材２６−１〜２６−６で構成している。
【００２１】
一方、付勢機構２４のレバー２４−１を軸支するために、板部材２６におけるロータリーキルン側の端面に軸支部２７が溶接等により固定されている。板部材２６と軸支部２７には連通する貫通穴が形成されており、この貫通穴に軸支用のピン２８が挿通されている。レバー２４−１はピン２８により回動自在に軸支されている。
【００２２】
図７はレバー２４−１を示し、ばね部材２４−２を受けるための受け部２４−１１と、ピン２８により軸支される軸支用受け部２４−１２と、図５の連結部材２３−２により軸支される軸支用受け部２４−１３とを持つ。
【００２３】
図８はバネ部材２４−２と対をなすレバー２４−１との関係を示す。対をなす２つのレバー２４−１の受け部２４−１１にボルト２４−３が挿通されている。２つの受け部２４−１１の間のねじ部にはナット２４−４、２４−５が取り付けられており、一方の受け部２４−１１とナット２４−５との間にばね部材２４−２が設けられている。一方の受け部２４−１１はばね部材２４−２の広がり力を直接受け、他方の受け部２４−１１はナット２４−４を介してばね部材２４−２の広がり力を受ける。この広がり力により、レバー２４−１の一端が分割シール部材２３−１をロータリーキルン１０の中心方向に押圧する。
【００２４】
可動側シール受け板２１は、フード３０とは反対側に傾斜するように支持体１１に固定されている。一方、固定側シール受け板２２は可動側シール受け板２１に対して９０度に近い角度を形成するように板部材２６に設けられている。このような９０度に近い角度で対向している可動側シール受け板２１と固定側シール受け板２２との間のギャップを塞ぐために、分割シール部材２３−１は前記角度に対応する断面略Ｖ字形状を持つ。そして、分割シール部材２３−１のＶ字形状の外側面が可動側シール受け板２１と固定側シール受け板２２に当接している。特に、可動側シール受け板２１はロータリーキルン１０の運転中は回転しているので、分割シール部材２３−１は可動側シール受け板２１に摺接することとなる。
【００２５】
本形態では更に、互いに隣接し合う分割部材２３−１の継ぎ目を、図９に示すような断面略Ｖ字形状を持つカバー板２９でカバーするようにしている。特に、分割シール部材２３−１は付勢機構２４の押圧力により周方向に伸縮したり、ロータリーキルン１０の径方向に変形するので、これらの伸縮、変形に対応できるように、カバー板２９の一端側のみを一方の分割シール部材２３−１に固定するようにしている。また、分割シール部材２３−１は、その両縁部にＲ（アール）部が形成されているので、これに合わせてカバー板２９の両縁部にもＲ部を形成している。
【００２６】
以上のようなシール装置がロータリーキルン１０の入側における端部にも設けられる。勿論、一端側にのみ開口を持つロータリーキルンの場合には、この開口側にのみシール装置が設けられる。
【００２７】
以上のような構造により、上記した公報のシール装置に比べてはるかに簡単な構造にてロータリーキルンとフードとの間を完全にシールすることができる。
【００２８】
なお、シール部材２３の分割数は１２に限らず任意である。また、ばね部材２４−２も圧縮コイルばねに代えて引張りコイルばねを使用しても良い。この場合の引張りコイルばねによる付勢形態は図８の場合と異なることは言うまでもない。更に、ロータリーキルン１０は、その回転により外周の真円度に狂いが生じ易い。この場合、ロータリーキルン１０の回転中に可動側シール受け板２１とシール部材２３との間に部分的に隙間が生じることが考えられる。このような対策としては、ロータリーキルン１０と支持体１１との間に、真円度の狂いを補償するように作用する緩衝部材、例えばクッション材のようなものを介在させれば良い。
【００２９】
次に、図１０〜図１２を参照して、本発明の第２の実施の形態について説明する。本形態では、分割シール部材２３−１に対する付勢をカバー板４１を介して行うようにしたものである。言い換えれば、シール装置２０以外の部分については第１の実施の形態と同じであり、従って、以下では、シール装置２０部分についてのみ説明する。なお、図１０は、第２の実施の形態を図２と同じ方向から見た図であるが、図２に示されているロータリキルン１０、支持体１１、可動側シール受け板２１、及び板部材２６は図示を省略している。
【００３０】
シール装置２０における付勢機構２４´は、互いに隣接し合う分割シール部材２３−１の両方にわたるように設けられて互いに隣接し合う分割シール部材２３−１の間を塞いでいるカバー板４１と、第１の実施の形態と同様にフード側に回動自在に軸支されて一端がカバー板４１に連結されているレバー２４−１と、レバー２４−１の他端側を前記一端がカバー板４１を押圧するように付勢するエアシリンダ機構２４−２´とから成る。このような付勢機構２４´が互いに隣接し合う分割シール部材２３−１の間毎に設けられている。レバー２４−１の一端側とカバー板４１との間の連結構造は、図５に示されている構造と同じで良い。
【００３１】
特に、付勢機構２４´は、互いに隣接し合う２つの付勢機構２４´を対とする。そして、対をなす付勢機構２４´は、それぞれのレバー２４−１の前記一端側が互いに離れる方向に延在するように設けられ、かつそれぞれのレバー２４−１の前記他端側の間にエアシリンダ機構２４−１を介在させることにより、それぞれのレバー２４−１の前記一端がカバー板４１を押圧するように付勢される。
【００３２】
図３において説明したように、固定側シール受け板２２と可動側シール受け板２１は約９０度に近い角度を形成するように設けられている。分割シール部材２３−１は前記角度に対応する断面略Ｖ字形状を持つが、その端部を通してのガス漏れを防ぐために、分割シール部材２３−１の端部は三角形の板部材２３−１２で塞がれている。本形態では更に、分割シール部材２３−１の上端側についても少なくともカバー板４１と接する部分が板部材２３−１３で塞がれている。
【００３３】
本形態ではまた、板部材２３−１３の上面側であって互いに隣接する分割シール部材２３−１のそれぞれに対応する箇所に、カバー板４１を遊嵌状態で貫通するようにボルト４２が立設されている。特に、ボルト４２の頭部はカバー板４１と接しないようにしてカバー板４１の径方向への移動を自在にしている。更に、カバー板４１におけるボルト４２の貫通穴は、ボルト４２のねじ部の径よりやや広い幅で周方向に長い長穴４１ａとしている。これにより、カバー板４１は、分割シール部材２３−１に対して周方向にスライド可能になっている。なお、カバー板４１は、一方の分割シール部材２３−１に対してスライド可能になっていれば良い。この場合、上記のボルト４２と長穴４１ａとの関係は一方の分割シール部材２３−１に対して適用されれば良く、他方は分割シール部材２３−１に固定しても良い。
【００３４】
第１の実施の形態では、付勢機構におけるばね手段としてコイルばねを使用し、第２の実施の形態ではエアシリンダ機構を使用する場合について説明したが、これらは相互に入れ替え可能であり、また他のばね手段、例えばガススプリング等を用いても良い。
【００３５】
【発明の効果】
以上説明してきたように、本発明によればロータリーキルンの開口部とフードとの間のシールをラビリンスによらない比較的簡単な構造で実現することができる。
【図面の簡単な説明】
【図１】本発明をロータリーキルンの出側における端部とフードとの間に適用する場合の実施の形態を示した断面図である。
【図２】図１の形態を図１の矢印Ａ方向から見た図である。
【図３】図１のＢ部を拡大して示した図である。
【図４】本発明に使用される分割シール部材を示した図である。
【図５】図４に示された分割シール部材を図４の線Ｃで切断した断面図である。
【図６】本発明に使用される分割板部材を示した図である。
【図７】本発明に使用される付勢機構におけるレバーを示した図である。
【図８】本発明に使用される付勢機構におけるばね部材とその周辺の要素の関係を示した図である。
【図９】本発明に使用されるカバー板を示した図である。
【図１０】本発明の第２の実施の形態を、図２と同じ方向から見た図である。
【図１１】図１０の線Ｃによる断面図である。
【図１２】図１０の線Ｄによる断面図である。
【符号の説明】
１０ロータリーキルン
１１支持体
２０シール装置
２１可動側シール受け板
２２固定側シール受け板
２３シール部材
２３−１分割シール部材
２４、２４´ 付勢機構
２４−１レバー
２４−２ばね部材
２４−２´ エアシリンダ機構
２９、４１カバー板
３０フード
４２ボルト[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a seal device suitable for a rotary kiln having a structure in which an object to be processed input from an opening on one end is melted while being moved to the other end, and molten slag and exhaust gas are discharged from the opening on the other end. .
[0002]
[Prior art]
Generally, a rotary kiln has openings at both ends, and each opening is provided with other equipment via a hood. As other equipment, for example, a processing object charging equipment is provided at one end (input side) of the rotary kiln, and a secondary combustion tower is provided at the other end (output side). The secondary combustion tower usually includes a facility for collecting and reburning gas discharged from the rotary kiln and for detoxifying the exhaust gas, and a facility for discharging the discharged molten slag to the outside.
[0003]
In any case, in such a rotary kiln, if the inside and the outside air communicate with each other, the temperature, the pressure, the oxygen concentration and the like inside the kiln change, and the combustion conditions fluctuate. For this reason, a sealing device is provided between the rotary kiln and the hood. This sealing device needs to be interposed between the rotating rotary kiln and the hood which is always fixed during operation to perform sealing.
[0004]
An example of such a sealing device is disclosed in, for example, JP-A-6-281348. This seal device is a seal device at a rotary connection portion between a rotary kiln body and a hood, and includes a rotating portion that rotates with the rotary kiln body and a fixed portion that does not rotate.
[0005]
The rotating part can slide on a seat welded to the rotary kiln body, a guide pin welded to the seat at predetermined intervals in a circumferential direction and an axial direction of the rotary kiln body, and a seat surface of the seat. A flexible sealing material provided in the above, two or more seal holding members, each of which is divided into a plurality of rings in the shape of a ring having an H-shaped cross section and which are divided in the circumferential direction and whose division positions are juxtaposed with each other, A tip ring fastened to an inner surface of an outer peripheral end of the seal holding member, and a bracket welded to the seal holding member with the guide pin interposed at a circumferential center of each division of the seal holding member. A band with a coil spring, which is divided and mounted on the outer peripheral surface of the cross member of the seal holding member and is connected between the end surfaces by a coil spring having an adjustment bolt. It is Bei.
[0006]
On the other hand, the fixed portion includes a fixed base fixed to a foundation near a tip of the rotary kiln on the hood side, a fixed ring fixed to the fixed base, a cover ring fastened to the fixed ring, and the cover ring. A tip ring holding member having an I-shaped cross section welded to the inner periphery of the seal holding member at a position facing the groove of the seal holding member, and a tip ring fastened to both end portions of the tip ring holding member. (For details, see the above publication).
[0007]
[Problems to be solved by the invention]
However, the above-described sealing device has a problem in that the structure is complicated because a seal is realized by forming a labyrinth in a seal holding member having an H-shaped cross section.
[0008]
Therefore, an object of the present invention is to provide a rotary kiln sealing device that can realize a seal between an opening of a rotary kiln and a hood with a relatively simple structure that does not depend on labyrinth.
[0009]
[Means for Solving the Problems]
INDUSTRIAL APPLICABILITY The present invention is applied to a rotary kiln provided with a hood via a sealing device at an end of the rotary kiln having at least one open end on the opening side, wherein the sealing device is a ring-shaped movable provided on the rotary kiln side. A side seal receiving plate, a ring-shaped fixed side seal receiving plate provided on the hood side so as to face the movable side seal receiving plate via a gap, the movable side seal receiving plate and the fixed side seal receiver. A ring-shaped seal member provided so as to be in contact with the plate and closing the gap; and a biasing means for biasing the seal member toward a center direction of the rotary kiln; A plurality of divided seal members divided in a direction, wherein the urging means is rotatably supported on the hood side and has one end provided with the divided seal portion. And a biasing mechanism comprising a spring member for biasing the other end of the lever so that the one end presses the split seal member is provided for each of the split seal members. Features.
[0010]
In the present sealing device, the urging mechanism provided for each of the divided seal members is provided so as to form a pair for each of two divided seal members adjacent to each other, and the pair of urging mechanisms is provided with respective levers. The one end of each lever is provided so as to extend in a direction away from each other, and the one end of each lever presses the divided seal member by interposing a coil spring between the other end of each lever. It is urged to.
[0011]
In the present sealing device, the fixed-side seal receiving plate and the movable-side seal receiving plate are provided so as to form an angle close to about 90 degrees, and the divided seal member has a substantially V-shaped cross section corresponding to the angle. have.
[0012]
Further, in the present sealing device, the joint between the divided seal members adjacent to each other is covered with a cover plate having a substantially V-shaped cross section, and only one end of the cover plate is fixed to the divided seal member.
[0013]
According to the present invention, a ring-shaped movable seal receiving plate provided on the rotary kiln side, and a ring-shaped fixed side provided on the hood side so as to face the movable seal receiving plate via a gap. A seal receiving plate, a ring-shaped seal member provided so as to abut on the movable-side seal receiving plate and the fixed-side seal receiving plate and closing the gap, and moving the seal member toward a center of the rotary kiln. Biasing means for biasing the seal member, the seal member includes a plurality of divided seal members divided in a circumferential direction, and the bias means is provided so as to extend over both of the divided seal members adjacent to each other. A cover plate that blocks the divided seal members adjacent to each other and that is rotatably supported on the hood side and one end of which is in contact with the cover plate. A biasing mechanism comprising a bar and a spring means for biasing the other end of the lever so that the one end presses the cover plate is provided for each of the divided seal members adjacent to each other. A rotary kiln sealing device.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a rotary kiln sealing device according to the present invention will be described with reference to the drawings. Referring to FIG. 1, a hood 30 is provided at an end of the rotary kiln 10 on the outlet side via a sealing device 20. Needless to say, a similar sealing device is provided at the end of the rotary kiln 10 on the entry side, and the sealing device 20 on the exit side will be described below.
[0015]
2 and 3, the seal device 20 includes a ring-shaped movable-side seal receiving plate 21 fixed to a cylindrical support 11 provided around the rotary kiln 10, and a movable-side seal receiving plate. A ring-shaped fixed-side seal receiving plate 22 provided on the side of the hood 30 so as to be opposed to the hopper 30 via a gap, and provided in contact with the movable-side seal receiving plate 21 and the fixed-side seal receiving plate 22; It includes a ring-shaped seal member 23 closing the gap, and an urging device for urging the seal member 23 toward the center of the rotary kiln 10. Thus, the gap between the rotary kiln 10 and the hood 30 is completely closed by the support 11 and the sealing device 20.
[0016]
The movable-side seal receiving plate 21 and the fixed-side seal receiving plate 22 are each composed of a plurality of divided members in the circumferential direction, and are made of a material such as iron or stainless steel. The seal member 23 is made of a heat-resistant material such as iron.
[0017]
In the present embodiment, the seal member 23 also includes a divided seal member 23-1 divided into twelve in the circumferential direction, and the urging device includes twelve urging members provided to correspond to the divided seal members 23-1. It comprises a mechanism 24. Each of the urging mechanisms 24 is rotatably supported by the hood 30 and one end thereof is in contact with the divided sealing member 23-1. The other end of the lever 24-1 is connected to the other end. And a spring member 24-2 for urging the divided seal member 23-1 so as to press it. More specifically, each of the urging mechanisms 24 is provided so as to form a pair with each of the two divided seal members 23-1 adjacent to each other, and the pair of urging mechanisms 24 are the same as those of the respective levers 24-1. One end of each lever 24-1 is provided so as to extend in a direction away from each other, and a spring member 24-2 of an open coil spring is interposed between the other ends of the respective levers 24-1. The one end is urged to press the divided seal member 23-1.
[0018]
FIG. 4 shows the split seal member 23-1, and FIG. 5 shows the relationship between the split seal member 23-1 and the lever 24-1. Here, a connecting member 23-2 having a U-shaped cross section is fixed to the center of the divided seal member 23-1 by welding or the like, and one end of the lever 24-1 is provided in the U-shaped portion of the connecting member 23-2. Are rotatably supported.
[0019]
In this embodiment, in order to provide the fixed-side seal receiving plate 22, a ring-shaped plate member 25 having an L-shaped cross section is attached to the end surface of the hood 30 by welding or the like, and the ring-shaped plate member 26 is attached to the plate member 25. Are attached by bolts or the like. The fixed-side seal receiving plate 22 is attached to an end surface of the plate member 26 on the rotary kiln side by welding or the like.
[0020]
As shown in FIG. 6, the plate member 26 is composed of six divided plate members 26-1 to 26-6 that are divided into six in the circumferential direction.
[0021]
On the other hand, in order to support the lever 24-1 of the urging mechanism 24, a shaft support 27 is fixed to an end surface of the plate member 26 on the rotary kiln side by welding or the like. A through hole communicating with the plate member 26 and the shaft support 27 is formed, and a pin 28 for shaft support is inserted into the through hole. The lever 24-1 is rotatably supported by a pin 28.
[0022]
FIG. 7 shows a lever 24-1, a receiving portion 24-11 for receiving a spring member 24-2, a bearing receiving portion 24-12 which is supported by a pin 28, and a connecting member 23- shown in FIG. 2 and a bearing support portion 24-13 which is supported by the shaft 2.
[0023]
FIG. 8 shows the relationship between the spring member 24-2 and the paired lever 24-1. A bolt 24-3 is inserted into the receiving portion 24-11 of the pair of levers 24-1. Nuts 24-4, 24-5 are attached to the threaded portion between the two receiving portions 24-11, and a spring member 24-2 is provided between one receiving portion 24-11 and the nut 24-5. Is provided. One receiving portion 24-11 directly receives the spreading force of the spring member 24-2, and the other receiving portion 24-11 receives the spreading force of the spring member 24-2 via the nut 24-4. Due to this spreading force, one end of the lever 24-1 presses the divided seal member 23-1 toward the center of the rotary kiln 10.
[0024]
The movable-side seal receiving plate 21 is fixed to the support 11 so as to be inclined to the side opposite to the hood 30. On the other hand, the fixed-side seal receiving plate 22 is provided on the plate member 26 so as to form an angle close to 90 degrees with the movable-side seal receiving plate 21. In order to close the gap between the movable-side seal receiving plate 21 and the fixed-side seal receiving plate 22 that face each other at an angle close to 90 degrees, the divided seal member 23-1 has a cross section substantially V corresponding to the angle. It has a character shape. The V-shaped outer surface of the split seal member 23-1 is in contact with the movable-side seal receiving plate 21 and the fixed-side seal receiving plate 22. In particular, since the movable-side seal receiving plate 21 is rotating during the operation of the rotary kiln 10, the divided seal member 23-1 comes into sliding contact with the movable-side seal receiving plate 21.
[0025]
In this embodiment, the joint between the adjacent divided members 23-1 is further covered with a cover plate 29 having a substantially V-shaped cross section as shown in FIG. In particular, since the split seal member 23-1 expands and contracts in the circumferential direction due to the pressing force of the urging mechanism 24 and deforms in the radial direction of the rotary kiln 10, one end of the cover plate 29 is adapted to cope with these expansion and contraction and deformation. Only the side is fixed to one of the divided seal members 23-1. Since the split seal member 23-1 has R (R) portions formed at both edges thereof, R portions are formed at both edges of the cover plate 29 in accordance with the R portions.
[0026]
The sealing device as described above is also provided at the end of the rotary kiln 10 on the entry side. Of course, in the case of a rotary kiln having an opening only on one end side, a sealing device is provided only on this opening side.
[0027]
With the above structure, it is possible to completely seal the space between the rotary kiln and the hood with a much simpler structure than the seal device disclosed in the above-mentioned publication.
[0028]
Note that the number of divisions of the seal member 23 is not limited to 12, and is arbitrary. Further, a tension coil spring may be used for the spring member 24-2 instead of the compression coil spring. It is needless to say that the urging form by the tension coil spring in this case is different from the case of FIG. Furthermore, the rotation of the rotary kiln 10 tends to cause a deviation in the roundness of the outer periphery due to the rotation. In this case, it is conceivable that a gap is partially formed between the movable-side seal receiving plate 21 and the seal member 23 during the rotation of the rotary kiln 10. As such a countermeasure, a cushioning member, such as a cushion material, which acts to compensate for the irregularity of roundness may be interposed between the rotary kiln 10 and the support 11.
[0029]
Next, a second embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the urging of the divided seal member 23-1 is performed via the cover plate 41. In other words, parts other than the sealing device 20 are the same as those in the first embodiment, and therefore, only the sealing device 20 will be described below. FIG. 10 is a view of the second embodiment viewed from the same direction as FIG. 2, but the rotary kiln 10, the support 11, the movable-side seal receiving plate 21, and the plate shown in FIG. The illustration of the member 26 is omitted.
[0030]
A biasing mechanism 24 ′ in the seal device 20 is provided so as to extend over both of the divided seal members 23-1 adjacent to each other, and covers a gap between the divided seal members 23-1 adjacent to each other. As in the first embodiment, a lever 24-1 rotatably supported on the hood side and one end of which is connected to the cover plate 41, and the other end of the lever 24-1 is connected to the cover plate by the cover plate. And an air cylinder mechanism 24-2 'for urging the air cylinder 41 to press it. Such an urging mechanism 24 'is provided between each of the divided seal members 23-1 adjacent to each other. The connection structure between one end of the lever 24-1 and the cover plate 41 may be the same as the structure shown in FIG.
[0031]
In particular, the biasing mechanism 24 'is a pair of two biasing mechanisms 24' adjacent to each other. The pair of biasing mechanisms 24 'are provided so that the one ends of the respective levers 24-1 extend in a direction away from each other, and air is provided between the other ends of the respective levers 24-1. The one end of each lever 24-1 is urged to press the cover plate 41 by interposing the cylinder mechanism 24-1.
[0032]
As described in FIG. 3, the fixed-side seal receiving plate 22 and the movable-side seal receiving plate 21 are provided so as to form an angle close to about 90 degrees. Although the divided seal member 23-1 has a substantially V-shaped cross section corresponding to the angle, the end of the divided seal member 23-1 is formed by a triangular plate member 23-12 in order to prevent gas leakage through the end. It is closed. Further, in the present embodiment, at least the portion of the upper end side of the divided seal member 23-1 which is in contact with the cover plate 41 is closed by the plate member 23-13.
[0033]
In the present embodiment, bolts 42 are erected so as to penetrate the cover plate 41 in a loosely fitted state on the upper surface side of the plate member 23-13 and at positions corresponding to the divided seal members 23-1 adjacent to each other. Have been. In particular, the head of the bolt 42 does not come into contact with the cover plate 41 to allow the cover plate 41 to move freely in the radial direction. Further, the through hole of the bolt 42 in the cover plate 41 is a long hole 41 a that is slightly wider than the diameter of the threaded portion of the bolt 42 and is long in the circumferential direction. Thereby, the cover plate 41 is slidable in the circumferential direction with respect to the divided seal member 23-1. Note that the cover plate 41 may be slidable with respect to one of the divided seal members 23-1. In this case, the relationship between the bolt 42 and the elongated hole 41a may be applied to one of the divided seal members 23-1, and the other may be fixed to the divided seal member 23-1.
[0034]
In the first embodiment, the case where the coil spring is used as the spring means in the biasing mechanism, and the case where the air cylinder mechanism is used in the second embodiment has been described, but these can be interchanged. Other spring means, such as a gas spring, may be used.
[0035]
【The invention's effect】
As described above, according to the present invention, the seal between the opening of the rotary kiln and the hood can be realized with a relatively simple structure that does not depend on the labyrinth.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment in which the present invention is applied between an end portion on the outlet side of a rotary kiln and a hood.
FIG. 2 is a view of the embodiment of FIG. 1 as viewed from the direction of arrow A in FIG.
FIG. 3 is an enlarged view of a portion B in FIG. 1;
FIG. 4 is a view showing a divided seal member used in the present invention.
FIG. 5 is a cross-sectional view of the divided seal member shown in FIG. 4 taken along a line C in FIG. 4;
FIG. 6 is a view showing a divided plate member used in the present invention.
FIG. 7 is a diagram showing a lever in a biasing mechanism used in the present invention.
FIG. 8 is a diagram showing a relationship between a spring member and peripheral elements in a biasing mechanism used in the present invention.
FIG. 9 is a view showing a cover plate used in the present invention.
FIG. 10 is a view of a second embodiment of the present invention as viewed from the same direction as FIG. 2;
11 is a sectional view taken along line C in FIG.
FIG. 12 is a sectional view taken along line D of FIG. 10;
[Explanation of symbols]
Reference Signs List 10 rotary kiln 11 support body 20 sealing device 21 movable-side seal receiving plate 22 fixed-side seal receiving plate 23 seal member 23-1 split seal member 24, 24 'biasing mechanism 24-1 lever 24-2 spring member 24-2' air Cylinder mechanism 29, 41 Cover plate 30 Hood 42 Bolt

Claims

In a rotary kiln comprising a hood provided at an end on the opening side of the rotary kiln having at least one end side opened through a sealing device,
The sealing device,
A ring-shaped movable-side seal receiving plate provided on the rotary kiln side,
A ring-shaped fixed-side seal receiving plate provided on the hood side so as to face the movable-side seal receiving plate via a gap,
A ring-shaped seal member provided so as to contact the movable-side seal receiving plate and the fixed-side seal receiving plate and closing the gap,
Urging means for urging the seal member toward the center of the rotary kiln,
The seal member includes a plurality of divided seal members divided in a circumferential direction,
The urging means includes a lever rotatably supported on the hood side and one end of which is in contact with the divided seal member, and the other end of the lever presses the divided seal member at one end. A rotary kiln sealing device, wherein a biasing mechanism comprising a biasing spring means is provided for each of the divided seal members.

The sealing device according to claim 1, wherein the urging mechanism provided for each of the divided seal members is provided so as to form a pair for each of two divided seal members adjacent to each other, and the pair of urging mechanisms includes: The one end of each lever is provided so as to extend in a direction away from each other, and the spring means is interposed between the other ends of the respective levers so that the one end of each lever can serve as the divided seal member. A rotary kiln sealing device, which is urged to press.

2. The seal device according to claim 1, wherein the fixed-side seal receiving plate and the movable-side seal receiving plate are provided so as to form an angle close to about 90 degrees, and the divided seal member has a cross section substantially V corresponding to the angle. A rotary kiln sealing device having a character shape.

4. The sealing device according to claim 3, wherein joints of the divided seal members adjacent to each other are covered with a cover plate having a substantially V-shaped cross section, and only one end of the cover plate is fixed to the divided seal member. A rotary kiln sealing device, characterized in that:

In a rotary kiln comprising a hood provided at an end on the opening side of the rotary kiln having at least one end side opened through a sealing device,
The sealing device,
A ring-shaped movable-side seal receiving plate provided on the rotary kiln side,
A ring-shaped fixed-side seal receiving plate provided on the hood side so as to face the movable-side seal receiving plate via a gap,
A ring-shaped seal member provided so as to contact the movable-side seal receiving plate and the fixed-side seal receiving plate and closing the gap,
Urging means for urging the seal member toward the center of the rotary kiln,
The seal member includes a plurality of divided seal members divided in a circumferential direction,
The urging means is provided so as to extend over both of the divided seal members adjacent to each other, and covers a space between the divided seal members adjacent to each other. And a biasing mechanism comprising a lever having one end in contact with the cover plate and a spring means for biasing the other end of the lever so that the one end presses the cover plate. A rotary kiln sealing device provided between seal members.

6. The sealing device according to claim 5, wherein the urging mechanism provided between the divided seal members adjacent to each other is a pair of two urging mechanisms adjacent to each other, and the pair of urging mechanisms is The one end of each lever is provided so as to extend in a direction in which the one end of each lever is apart from each other, and the one end of each lever is provided with the cover plate by interposing a spring means between the other end of each lever. A rotary kiln sealing device, which is urged to press.

6. The sealing device according to claim 5, wherein the fixed-side seal receiving plate and the movable-side seal receiving plate are provided so as to form an angle close to about 90 degrees, and the divided seal member has a cross section substantially V corresponding to the angle. A sealing device for a rotary kiln, wherein the sealing device has a character shape and at least an end thereof is closed.

6. The rotary kiln according to claim 5, wherein at least one end of the cover plate is slidable at least in a circumferential direction with respect to at least one of the divided seal members adjacent to each other. Sealing device.