JP4028277B2

JP4028277B2 - Centrifugal crusher

Info

Publication number: JP4028277B2
Application number: JP2002100432A
Authority: JP
Inventors: 賀谷隆人; 相原秀一
Original assignee: Kotobuki Engineering and Manufacturing Co Ltd
Current assignee: Kotobuki Engineering and Manufacturing Co Ltd
Priority date: 2002-04-02
Filing date: 2002-04-02
Publication date: 2007-12-26
Anticipated expiration: 2022-04-02
Also published as: JP2003290675A

Description

【０００１】
【発明の属する技術分野】
本発明は、鉱物等の破砕原料を破砕する遠心破砕機に関するもので、特にハンマー体の寿命を長くするようにした遠心破砕機に関するものである。
【０００２】
【従来の技術】
遠心破砕機は、鉛直軸を中心に高速回転する円筒状のロ−タａを有しており、このロ−タａ内に投入した破砕原料ｇをロ−タａの回転により生じる遠心力によってロ−タａ周面の放出口ｃから放出し、これを周囲の破砕室ｄ内のデッドベッドｅに衝突させて細かく粉砕する装置である。
出願人は、破砕効率を高める方法として、図１０に示すようにロータａ外周面にハンマー体ｂを設けるとともに破砕室ｄ下部内縁に環状壁ｆを設け、細かく粉砕しきれなかった破砕原料ｇをハンマー体ｂと環状壁ｆとにより細かく砕く方法を先に提案した。
【０００３】
【発明が解決しようとする課題】
本発明が前提とする遠心破砕機にあっては、デッドベッドｅが環状壁ｆの頂部を最下点として斜めに形成される。
そのため、デッドベッドｅから落下する破砕原料ｇの落下点は全周にわたって等しくなる。落下する破砕原料ｇの大きさよってハンマー体ｂとの衝突位置に若干の差はあるものの大半の破砕原料ｇは、その衝突する範囲が限られてしまう。
その結果、ハッチングで示すようにハンマー体ｂの摩耗範囲ｈが狭い範囲に集中してハンマー体ｂの交換寿命が短い問題がある。
また、ハンマー体ｂの摩耗が進行するにつれて破砕性能が低下する恐れもある。
【０００４】
【本発明の目的】
本発明は上記した点に鑑みてなされたもので、ハンマー体の交換寿命の延長化を図るとともに、良好な破砕性能を持続できる遠心破砕機を提供することを目的とする。
【０００５】
【課題を解決するための手段】
上記のような目的を達成するために、本発明の遠心破砕機は、外周面にハンマー体を突出して設けたロータと、前記ロータの周囲に該ロータを取り囲んで形成した環状の破砕室とを備え、ロータの放出口より放出した破砕原料を破砕室内のデッドベッドとロータのハンマー体との協動により破砕する遠心破砕機において、
前記破砕室の底板の内縁に環状壁を起立して設け、前記破砕室の底板から前記環状壁の頂部までの高さが不均一となるように該環状壁に高低差を設けて形成したことを特徴とするものである。
【０００６】
また本発明の遠心破砕機は、外周面にハンマー体を突出して設けたロータと、前記ロータの周囲に該ロータを取り囲んで形成した環状の破砕室とを備え、ロータの放出口より放出した破砕原料を破砕室内のデッドベッドとロータのハンマー体との協動により破砕する遠心破砕機において、前記破砕室の底板を床面からの高さを変えて多段的に形成し、前記多段的に形成した底板の内縁に環状壁を起立して設け、該環状壁に高低差を設けて形成したことを特徴とするものである。
【０００７】
また本発明の遠心破砕機は、前記環状壁を破砕室の底板からの起立高さが異なる複数の分割体で構成し、該分割体をリング状に配列して構成したことを特徴とするものである。ここで分割体を断面略Ｔ字形または断面略Ｌ字形に形成することができる。
【０００８】
また本発明の遠心破砕機は、外周面にハンマー体を突出して設けたロータと、前記ロータの周囲に該ロータを取り囲んで形成した環状の破砕室とを備え、ロータの放出口より放出した破砕原料を破砕室内のデッドベッドとロータのハンマー体との協動により破砕する遠心破砕機において、前記破砕室の底板の内縁に環状壁を起立して設け、前記環状壁は破砕室の底板からの起立高さが均一であるとともに、該環状壁の上面の一部にロータ側へ向けて斜め下方に傾斜した傾斜面を形成して環状壁に高低差を設けて形成したことを特徴とするものである。
【０００９】
【発明の実施の形態１】
以下、図面を参照しながら本発明に係る一実施の形態について説明する。
【００１０】
＜イ＞遠心破砕機の構成（図１）
遠心破砕機１は、略ドラム状のロータ１０と、このロータ１０を回転自在に収容する破砕機本体２０とからなる。
ロータ１０内に投入された破砕原料４０は、ロータ１０の回転により生じる遠心力によってロータ周面の放出口１５から放出し、これを周囲の破砕室２１に衝突させて細かく粉砕する。
【００１１】
＜ロ＞ロータ
ロータ１０は、上下に対向する天板１１及び底板１３と、それらの周縁部を連結する側板１２とでドラム状に形成する。
天板１１の中央に投入口１４を突設し、図示していないがシュータなどへ接続し、破砕原料４０を連続的にロータ１０内へ投入することができる。
側板１２には周方向に適宜間隔をおいて複数の放出口１５を形成し、破砕原料４０を破砕室２１へ向けて放出する。
ロータ１０の中央下方に回転軸１８を取り付けており、図示しないモータなどの駆動手段によって回転軸１８を一方向へ回転し、ロータ１０を鉛直軸を中心に高速回転することができる。
【００１２】
ロータ１０の外周面に、複数のハンマー体１６をボルトまたは溶接などで適宜間隔に取り付ける。
ハンマー体１６は、例えば板状に形成し、ハンマー面１７がロータ１０の外周面から突出するとともに、底板１３より下方に突出するように取り付ける(図１参照)。
なお、ハンマー面１７は、超硬質の金属板をロウ付け等で一体に接合するのが好ましい。
【００１３】
＜ハ＞破砕室
破砕機本体２０の内部に、ロータ１０の周囲を取り囲むように環状の破砕室２１を形成する。
破砕室２１内には、ロータ１０から放出した破砕原料４０が底板２２に堆積してデッドベッド２３が構成される(図４参照)。このデッドベッド２３に破砕原料４０が衝突して細かく粉砕される。
破砕室２１の下方に出口シュート２５を接続する(図１参照)。
【００１４】
＜ニ＞環状壁
破砕室２１の下部内縁、即ち底板２２内縁に環状壁３０を設ける。
環状壁３０は、硬質材料からなる起立高さの異なる二種類の分割体３１Ａ、３１Ｂを連続的に配列したリング状の周壁３２である(図１参照)。
即ち、取付板３４(破砕室２１の底板２２)から周壁３２の上面３３までの起立高さＨの異なる少なくとも二種類の分割体３１Ａ、３１Ｂを準備し、これを交互に連続して底板２２に取り付けることによって高低差を有する環状壁３０を形成することができる。なお、環状壁３０の下端部は高低差を形成する必要はない。
【００１５】
本例では、分割体３１Ａ、３１Ｂは、周壁３２の起立高さが異なるのみで、基本構成は同一であるからその一方について説明し、他方の説明を省略する。
分割体３１Ａは、例えば図２に示すように円弧形を呈する周壁３２と、周壁３２の湾曲する外周面に直交して断面略Ｔ字形に接合した取付板３４で構成する。あるいは図３に示すように円弧形を呈する周壁３２に取付板３４を直交して接合し、断面略Ｌ字形となるように構成してもよい。
周壁３２と取付板３４の間に補強用のリブ３６を設けるとともに、取付板３４の所定位置に取付用のボルト穴３５を開口し、ボルト２６及びナット２７によって分割体３１Ａを底板２２に取り付ける(図４参照)。
分割体３１Ａ、３１Ｂを底板２２の内周縁に取り付ける際、隣り合う分割体３１Ａ、３１Ｂと隙間なく取り付け、連続した環状壁３０を形成することが好ましいが、隙間を空けて間欠的に取り付けてもよい。
また、環状壁３０は、これと相対向するハンマー体１６との間に所定の隙間を形成しており、この隙間に細かく破砕された原料が層を成して落下していく。
【００１６】
【作用】
次に図４を参照して本発明の作用について説明する。
【００１７】
＜イ＞破砕原理
投入口１４よりロータ１０内に投入した鉱物等の破砕原料４０は、ロータ１０の回転により生じる遠心力によって放出口１５から放出される。
放出された破砕原料４０は、デッドベッド２３に衝突する。
細かく粉砕された破砕原料４０は、ロータ１０と破砕室２１の隙間、即ち、図４に示すように環状壁３０と相対向するハンマー体１６との間の隙間を通じて落下する。
【００１８】
ところが細かく粉砕しきれなかった破砕原料４０は、デッドベッド２３の最下点Ａ１(分割体３１Ａの上面３３)、Ａ２(分割体３１Ｂの上面３３)から落下し、高速回転しているハンマー面１７に衝突する。
本発明では、取付板３４から周壁３２の上面３３までの起立高さＨを異ならせた少なくとも二種類の分割体３１Ａ、３１Ｂを準備し、これを交互に連続して底板２２に取り付けることによって高低差を有する環状壁３０を形成したことが大きな特徴である。
【００１９】
＜ロ＞ハンマー面の摩耗について
分割体３１Ａで環状壁３０を構成している箇所では、図４に示すようにデッドベッド２３の最下点Ａ１から破砕原料４０がハンマー面１７のＬ１で示す範囲へ衝突する。
また、分割体３１Ｂで環状壁３０を構成している箇所では、デッドベッド２３の最下点Ａ２から破砕原料４０がハンマー面１７のＬ２で示す範囲へ衝突する。
このように環状壁３０に高低差を形成することによって、破砕原料４０のハンマー面１７へ衝突する範囲が広がり、ハンマー面１７の摩耗負担を軽減する。
仮に環状壁３０の高さが一定であれば、破砕原料４０の大半がハンマー面１７の狭い範囲に衝突し、部分的な摩耗が激しいものとなる。
本発明によれば、取付板３４からの起立高さの差が大きくなる程、ハンマー面１７の衝突範囲を広くすることができる。そのため、ハンマー面１７は広く浅く均一化した摩耗が生じるのみであり、ハンマー体１６の交換寿命を長くすることができる。
当然に良好な破砕性能を長期にわたって持続できる。
【００２０】
【発明の実施の形態２】
実施の形態１では、起立高さの異なる二種類の分割体３１Ａ、３１Ｂで環状壁３０の高低差を形成したが、上面３３を湾曲する内周面へ向けて斜め下方に切り欠いて傾斜面３７を形成した分割体３１Ｃ(図５参照)と、既述した分割体３１Ａ（３１Ｂ）とを交互に組み合わせて底板２２に取り付けて環状壁３０を形成してもよい。
本例の場合は、分割体３１Ｃと、分割体３１Ａ（３１Ｂ）の底板２２からの起立高さは均一であるが、傾斜面３７を形成したことでデッドベッド２３に落下位置の異なる二種類の最下点Ａ１、Ａ２を形成することができる(図６参照)。最下点Ａ１、Ａ２は、ハンマー面１７からの距離が異なっており、実質的に環状壁３０に高低差を形成することができる。
【００２１】
本例も、図６に示すように分割体３１Ａで環状壁３０を構成している箇所では、デッドベッド２３の最下点Ａ１から破砕原料４０がハンマー面１７のＬ１で示す範囲へ衝突する。
また、傾斜面３７を形成した分割体３１Ｃで環状壁３０を構成している箇所では、デッドベッド２３の最下点Ａ２から破砕原料４０がハンマー面１７のＬ２で示す範囲へ衝突する。
このため、破砕原料４０のハンマー面１７へ衝突する範囲が広がり、ハンマー面１７の摩耗負担を軽減し、ハンマー体１６の交換寿命を長くすることができる。本例の場合は、分割体３１Ａ（３１Ｂ）の上面３３を斜めに切り欠くだけで傾斜面３７を形成できるので、分割体３１Ｃの製作が容易である。
【００２２】
【発明の実施の形態３】
破砕室２１の底板２２を、基準となる、例えば据付面である床面から高さを変えて複数段(多段的)に形成して、環状壁３０に高低差を設けてもよい。
底板２２に分割体３１を取り付けるため、底板２２の床面からの高さをＴ１、Ｔ２のように異ならせることによって、同じ起立高さの分割体３１であっても高低差を有する環状壁３０を形成することができる(図７参照)。図７では分割体３１Ｂを使用した例であるが、高さの異なる二種類の最下点Ａ１、Ａ２を形成する。
また、分割体３１Ａ、３１Ｂを適宜組み合わせることで環状壁３０の高低差を大きくすることができ、ハンマー面１７への衝突範囲がより広がり、ハンマー面１７の摩耗がさらに軽減する。
【００２３】
【発明の実施の形態４】
図８の展開図に示すように環状壁３０の頂部(上面３３)を斜めに形成したり、あるいは図９の展開図に示すように環状壁３０の頂部(上面３３)を波形に形成して、破砕室２１の底板２２からの高さが不均一となるようにして、環状壁３０に高低差を設けてもよい。
本発明で重要なことは、環状壁３０の上面３３に高低差を形成することによって破砕原料４０のハンマー面１７への衝突範囲を広げることにあり、高低差を形成できる構造であれば特に限定されない。
【００２４】
【発明の実施の形態５】
既述した実施の形態１乃至４の環状壁３０を複数の分割体３１Ａ、３１Ｂ、３１Ｃで構成したが、環状壁３０を連続した一体ものとして形成してもよい。
【００２５】
【本発明の効果】
本発明は、以上説明したようになるから次のような効果を得ることができる。
＜イ＞環状壁に高低差を形成することによって、破砕原料のハンマー面へ衝突する範囲が広がり、ハンマー面の摩耗負担を軽減し、ハンマー体の交換寿命を長くすることができる。
＜ロ＞ハンマー体の部分的な摩耗を回避し、ハンマー体の寿命を長くすることができるため、良好な破砕性能を長期にわたって持続できる遠心破砕機を提供することができる。
【図面の簡単な説明】
【図１】本発明の遠心破砕機の一部を省略した斜視図。
【図２】分割体の斜視図。
【図３】分割体の他の例を示す斜視図。
【図４】ハンマー面の摩耗の状態を示す説明図。
【図５】分割体の他の実施例を示す斜視図。
【図６】ハンマー面の摩耗の状態を示す説明図。
【図７】他の実施例によるハンマー面の摩耗の状態を示す説明図。
【図８】他の実施例による環状壁の展開図。
【図９】他の実施例による環状壁の展開図。
【図１０】従来の遠心破砕機を示す縦断面図。
【符号の説明】
１・・・・遠心破砕機
１０・・・ロータ
１６・・・ハンマー体
１７・・・ハンマー面
２０・・・破砕機本体
２１・・・破砕室
２３・・・デッドベッド
３０・・・環状壁
３１Ａ・・・分割体
３１Ｂ・・・分割体
３１Ｃ・・・分割体
３２・・・周壁
３３・・・上面
３４・・・取付板
３７・・・傾斜面
４０・・・破砕原料[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a centrifugal crusher that crushes crushing raw materials such as minerals, and particularly relates to a centrifugal crusher that extends the life of a hammer body.
[0002]
[Prior art]
The centrifugal crusher has a cylindrical rotor a that rotates at high speed about a vertical axis, and the crushing raw material g charged in the rotor a is caused by centrifugal force generated by the rotation of the rotor a. This is a device that discharges from the discharge port c on the peripheral surface of the rotor a and collides with the dead bed e in the surrounding crushing chamber d to finely pulverize it.
As shown in FIG. 10, the applicant provides a hammer body b on the outer peripheral surface of the rotor a and an annular wall f on the lower inner edge of the crushing chamber d as shown in FIG. A method of finely crushing with the hammer body b and the annular wall f has been proposed previously.
[0003]
[Problems to be solved by the invention]
In the centrifugal crusher assumed by the present invention, the dead bed e is formed obliquely with the top of the annular wall f as the lowest point.
Therefore, the dropping points of the crushing raw material g falling from the dead bed e are equal over the entire circumference. Although there is a slight difference in the collision position with the hammer body b depending on the size of the crushing raw material g that falls, the colliding range of most of the crushing raw materials g is limited.
As a result, as shown by hatching, there is a problem that the wear range h of the hammer body b is concentrated in a narrow range and the replacement life of the hammer body b is short.
Further, the crushing performance may be lowered as the wear of the hammer body b progresses.
[0004]
[Object of the present invention]
The present invention has been made in view of the above points, and an object thereof is to provide a centrifugal crusher capable of extending the replacement life of the hammer body and maintaining good crushing performance.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a centrifugal crusher of the present invention comprises a rotor provided with a hammer body projecting from an outer peripheral surface, and an annular crushing chamber formed around the rotor and surrounding the rotor. In the centrifugal crusher that crushes the crushing material released from the rotor discharge port by the cooperation of the dead bed in the crushing chamber and the hammer body of the rotor,
An annular wall is provided upright at the inner edge of the bottom plate of the crushing chamber, and the annular wall is formed with a height difference so that the height from the bottom plate of the crushing chamber to the top of the annular wall is not uniform. It is characterized by.
[0006]
Further, the centrifugal crusher of the present invention comprises a rotor provided with a hammer body protruding on the outer peripheral surface, and an annular crushing chamber formed around the rotor so as to surround the rotor, and crushed discharged from the discharge port of the rotor. In the centrifugal crusher that crushes the raw material by the cooperation of the dead bed in the crushing chamber and the hammer body of the rotor, the bottom plate of the crushing chamber is formed in multiple stages by changing the height from the floor surface, and the multistage is formed An annular wall is provided upright on the inner edge of the bottom plate, and the annular wall is formed with a height difference.
[0007]
In the centrifugal crusher of the present invention, the annular wall is composed of a plurality of divided bodies having different standing heights from the bottom plate of the crushing chamber, and the divided bodies are arranged in a ring shape. Is. Here, the divided body can be formed in a substantially T-shaped section or a substantially L-shaped section.
[0008]
Further, the centrifugal crusher of the present invention comprises a rotor provided with a hammer body protruding on the outer peripheral surface, and an annular crushing chamber formed around the rotor so as to surround the rotor, and crushed discharged from the discharge port of the rotor. In the centrifugal crusher that crushes the raw material by the cooperation of the dead bed in the crushing chamber and the hammer body of the rotor, an annular wall is provided upright on the inner edge of the bottom plate of the crushing chamber, and the annular wall extends from the bottom plate of the crushing chamber. The rising height of the annular wall is uniform, and an inclined surface inclined obliquely downward toward the rotor side is formed on a part of the upper surface of the annular wall, and the annular wall is provided with a height difference. Is.
[0009]
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0010]
<A> Configuration of centrifugal crusher (Fig. 1)
The centrifugal crusher 1 includes a substantially drum-shaped rotor 10 and a crusher main body 20 that rotatably accommodates the rotor 10.
The crushing raw material 40 introduced into the rotor 10 is discharged from the discharge port 15 on the circumferential surface of the rotor by centrifugal force generated by the rotation of the rotor 10, and collides with the surrounding crushing chamber 21 to be finely crushed.
[0011]
 The rotor rotor 10 is formed in a drum shape with a top plate 11 and a bottom plate 13 that are vertically opposed to each other, and a side plate 12 that connects the peripheral portions thereof.
A charging port 14 is provided at the center of the top plate 11 and connected to a shooter or the like (not shown) so that the crushing raw material 40 can be continuously charged into the rotor 10.
A plurality of discharge ports 15 are formed in the side plate 12 at appropriate intervals in the circumferential direction, and the crushing raw material 40 is discharged toward the crushing chamber 21.
A rotating shaft 18 is attached below the center of the rotor 10, and the rotating shaft 18 can be rotated in one direction by a driving means such as a motor (not shown) so that the rotor 10 can be rotated at high speed around the vertical axis.
[0012]
A plurality of hammer bodies 16 are attached to the outer peripheral surface of the rotor 10 at appropriate intervals by bolts or welding.
The hammer body 16 is formed in a plate shape, for example, and is attached so that the hammer surface 17 protrudes from the outer peripheral surface of the rotor 10 and protrudes downward from the bottom plate 13 (see FIG. 1).
In addition, it is preferable that the hammer surface 17 joins a super-hard metal plate integrally by brazing.
[0013]
<C> An annular crushing chamber 21 is formed in the crushing chamber crusher body 20 so as to surround the rotor 10.
In the crushing chamber 21, the crushing raw material 40 discharged from the rotor 10 is deposited on the bottom plate 22 to constitute a dead bed 23 (see FIG. 4). The crushing raw material 40 collides with the dead bed 23 and is finely pulverized.
An outlet chute 25 is connected below the crushing chamber 21 (see FIG. 1).
[0014]
<D> An annular wall 30 is provided at the lower inner edge of the annular wall crushing chamber 21, that is, the inner edge of the bottom plate 22.
The annular wall 30 is a ring-shaped peripheral wall 32 in which two types of divided bodies 31A and 31B made of a hard material and having different standing heights are continuously arranged (see FIG. 1).
That is, at least two types of divided bodies 31A and 31B having different standing heights H from the mounting plate 34 (the bottom plate 22 of the crushing chamber 21) to the upper surface 33 of the peripheral wall 32 are prepared, and these are alternately and continuously formed on the bottom plate 22. By attaching, the annular wall 30 having a height difference can be formed. The lower end portion of the annular wall 30 does not need to form a height difference.
[0015]
In this example, the divided bodies 31A and 31B differ only in the standing height of the peripheral wall 32, and the basic configuration is the same. Therefore, one of them will be described, and the description of the other will be omitted.
For example, as shown in FIG. 2, the divided body 31 A includes an arcuate peripheral wall 32 and an attachment plate 34 joined in a substantially T-shaped cross section perpendicular to the curved outer peripheral surface of the peripheral wall 32. Alternatively, as shown in FIG. 3, a mounting plate 34 may be orthogonally joined to a peripheral wall 32 having an arc shape so that the cross section is substantially L-shaped.
A reinforcing rib 36 is provided between the peripheral wall 32 and the mounting plate 34, a mounting bolt hole 35 is opened at a predetermined position of the mounting plate 34, and the divided body 31 A is attached to the bottom plate 22 by the bolt 26 and the nut 27 ( (See FIG. 4).
When attaching the divided bodies 31A and 31B to the inner peripheral edge of the bottom plate 22, it is preferable to attach the divided bodies 31A and 31B adjacent to each other without a gap to form a continuous annular wall 30. Good.
Further, the annular wall 30 forms a predetermined gap between the annular wall 30 and the opposing hammer body 16, and the finely crushed raw material falls in layers in this gap.
[0016]
[Action]
Next, the operation of the present invention will be described with reference to FIG.
[0017]
 Crushing Principle The crushing raw material 40 such as mineral introduced into the rotor 10 from the inlet 14 is discharged from the outlet 15 by the centrifugal force generated by the rotation of the rotor 10.
The discharged crushing material 40 collides with the dead bed 23.
The finely crushed crushing raw material 40 falls through a gap between the rotor 10 and the crushing chamber 21, that is, a gap between the annular wall 30 and the opposing hammer body 16 as shown in FIG.
[0018]
However, the crushing raw material 40 that could not be finely crushed fell from the lowest point A1 (the upper surface 33 of the divided body 31A) and A2 (the upper surface 33 of the divided body 31B) of the dead bed 23, and the hammer surface 17 rotating at high speed. Collide with.
In the present invention, at least two types of divided bodies 31A and 31B having different standing heights H from the mounting plate 34 to the upper surface 33 of the peripheral wall 32 are prepared, and these are alternately and continuously attached to the bottom plate 22 to increase or decrease the height. A significant feature is that the annular wall 30 having a difference is formed.
[0019]
 At the place where the annular wall 30 is constituted by the divided body 31 A with respect to wear of the hammer surface, the range where the crushing raw material 40 is indicated by L 1 of the hammer surface 17 from the lowest point A 1 of the dead bed 23 as shown in FIG. 4. Collide with.
Moreover, in the location which comprises the annular wall 30 with the division body 31B, the crushing raw material 40 collides with the range shown by L2 of the hammer surface 17 from the lowest point A2 of the dead bed 23. FIG.
By forming the height difference in the annular wall 30 in this manner, the range of the crushing raw material 40 that collides with the hammer surface 17 is widened, and the wear load on the hammer surface 17 is reduced.
If the height of the annular wall 30 is constant, most of the crushing raw material 40 collides with the narrow area of the hammer surface 17 and the partial wear becomes severe.
According to the present invention, the collision range of the hammer surface 17 can be increased as the difference in the standing height from the mounting plate 34 increases. For this reason, the hammer surface 17 is wide and shallow, and only wear that is uniform occurs, and the replacement life of the hammer body 16 can be extended.
Naturally, good crushing performance can be maintained for a long time.
[0020]
Second Embodiment of the Invention
In the first embodiment, the height difference of the annular wall 30 is formed by the two types of divided bodies 31A and 31B having different standing heights, but the upper surface 33 is notched obliquely downward toward the curved inner peripheral surface and is inclined. The annular wall 30 may be formed by alternately combining the divided bodies 31C (see FIG. 5) formed with 37 and the previously described divided bodies 31A (31B) and attaching them to the bottom plate 22.
In the case of this example, the standing height from the bottom plate 22 of the divided body 31C and the divided body 31A (31B) is uniform, but by forming the inclined surface 37, the dead bed 23 has two different drop positions. The lowest points A1 and A2 can be formed (see FIG. 6). The lowest points A 1 and A 2 have different distances from the hammer surface 17, and can substantially form a height difference in the annular wall 30.
[0021]
Also in this example, as shown in FIG. 6, the crushing raw material 40 collides from the lowest point A 1 of the dead bed 23 to the range indicated by L 1 of the hammer surface 17 at the place where the annular wall 30 is configured by the divided body 31 A.
Further, at the place where the annular wall 30 is formed by the divided body 31 C formed with the inclined surface 37, the crushing raw material 40 collides with the range indicated by L 2 of the hammer surface 17 from the lowest point A 2 of the dead bed 23.
For this reason, the range which collides with the hammer surface 17 of the crushing raw material 40 spreads, the abrasion burden of the hammer surface 17 can be reduced, and the replacement life of the hammer body 16 can be lengthened. In the case of this example, since the inclined surface 37 can be formed simply by cutting the upper surface 33 of the divided body 31A (31B) obliquely, the divided body 31C can be easily manufactured.
[0022]
Embodiment 3 of the Invention
The bottom plate 22 of the crushing chamber 21 may be formed in a plurality of stages (multi-stage) by changing the height from a floor surface which is a reference, for example, an installation surface, and the annular wall 30 may be provided with a height difference.
Since the divided body 31 is attached to the bottom plate 22, the height of the bottom plate 22 from the floor surface is made different as T 1 and T 2. Can be formed (see FIG. 7). Although FIG. 7 shows an example in which the divided body 31B is used, two types of lowest points A1 and A2 having different heights are formed.
Further, by appropriately combining the divided bodies 31A and 31B, the height difference of the annular wall 30 can be increased, the collision range to the hammer surface 17 is further expanded, and the wear of the hammer surface 17 is further reduced.
[0023]
Embodiment 4 of the Invention
The top (upper surface 33) of the annular wall 30 is formed obliquely as shown in the development view of FIG. 8, or the top (upper surface 33) of the annular wall 30 is formed in a waveform as shown in the development view of FIG. The annular wall 30 may be provided with a height difference so that the height of the crushing chamber 21 from the bottom plate 22 is not uniform.
What is important in the present invention is to widen the collision range of the crushing raw material 40 to the hammer surface 17 by forming a height difference on the upper surface 33 of the annular wall 30, and particularly limited as long as the structure can form a height difference. Not.
[0024]
Embodiment 5 of the Invention
Although the annular wall 30 of the first to fourth embodiments described above is configured by the plurality of divided bodies 31A, 31B, and 31C, the annular wall 30 may be formed as a continuous and integral body.
[0025]
[Effect of the present invention]
Since the present invention has been described above, the following effects can be obtained.
 By forming a height difference in the annular wall, the range of collision of the crushing raw material with the hammer surface is widened, the wear load on the hammer surface is reduced, and the replacement life of the hammer body can be extended.
 Since partial wear of the hammer body can be avoided and the life of the hammer body can be extended, a centrifugal crusher capable of maintaining good crushing performance over a long period of time can be provided.
[Brief description of the drawings]
FIG. 1 is a perspective view in which a part of a centrifugal crusher of the present invention is omitted.
FIG. 2 is a perspective view of a divided body.
FIG. 3 is a perspective view showing another example of a divided body.
FIG. 4 is an explanatory diagram showing a state of wear on the hammer surface.
FIG. 5 is a perspective view showing another embodiment of the divided body.
FIG. 6 is an explanatory diagram showing a state of wear on the hammer surface.
FIG. 7 is an explanatory view showing a state of wear on a hammer surface according to another embodiment.
FIG. 8 is a development view of an annular wall according to another embodiment.
FIG. 9 is a development view of an annular wall according to another embodiment.
FIG. 10 is a longitudinal sectional view showing a conventional centrifugal crusher.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Centrifugal crusher 10 ... Rotor 16 ... Hammer body 17 ... Hammer surface 20 ... Crusher main body 21 ... Crushing chamber 23 ... Dead bed 30 ... Annular wall 31A ... divided body 31B ... divided body 31C ... divided body 32 ... peripheral wall 33 ... upper surface 34 ... mounting plate 37 ... inclined surface 40 ... crushing raw material

Claims

A rotor provided with a hammer body projecting from an outer peripheral surface; and an annular crushing chamber formed around the rotor so as to surround the rotor; a crushing material discharged from a discharge port of the rotor; In the centrifugal crusher that crushes in cooperation with the hammer body,
An upright wall is provided upright on the inner edge of the bottom plate of the crushing chamber,
The annular wall is formed with a height difference so that the height from the bottom plate of the crushing chamber to the top of the annular wall is non-uniform,
Centrifugal crusher.

A rotor provided with a hammer body projecting from an outer peripheral surface; and an annular crushing chamber formed around the rotor so as to surround the rotor; a crushing material discharged from a discharge port of the rotor; In the centrifugal crusher that crushes in cooperation with the hammer body,
The bottom plate of the crushing chamber is formed in multiple stages by changing the height from the floor surface,
An annular wall is provided upright on the inner edge of the multi-stage bottom plate, and the annular wall is formed with a height difference.
Centrifugal crusher.

The centrifugal crusher according to claim 1 or 2, wherein the annular wall is configured by a plurality of divided bodies having different standing heights from a bottom plate of the crushing chamber, and the divided bodies are arranged in a ring shape. A centrifugal crusher characterized by that.

The centrifugal crusher according to any one of claims 1 to 3, wherein the annular wall has a substantially T-shaped cross section or a substantially L-shaped cross section.

A rotor provided with a hammer body projecting from an outer peripheral surface; and an annular crushing chamber formed around the rotor so as to surround the rotor; a crushing material discharged from a discharge port of the rotor; In the centrifugal crusher that crushes in cooperation with the hammer body,
An upright wall is provided upright on the inner edge of the bottom plate of the crushing chamber,
The annular wall has a uniform standing height from the bottom plate of the crushing chamber, and an inclined surface inclined obliquely downward toward the rotor side is formed on a part of the upper surface of the annular wall so that the height difference between the annular walls It is characterized by being formed by providing
Centrifugal crusher.