JPS6331710Y2 - - Google Patents
Info
- Publication number
- JPS6331710Y2 JPS6331710Y2 JP1985140629U JP14062985U JPS6331710Y2 JP S6331710 Y2 JPS6331710 Y2 JP S6331710Y2 JP 1985140629 U JP1985140629 U JP 1985140629U JP 14062985 U JP14062985 U JP 14062985U JP S6331710 Y2 JPS6331710 Y2 JP S6331710Y2
- Authority
- JP
- Japan
- Prior art keywords
- chip
- substrate
- dovetail
- helical blade
- chips
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000758 substrate Substances 0.000 claims description 50
- 230000003014 reinforcing effect Effects 0.000 claims description 22
- 238000005245 sintering Methods 0.000 claims description 16
- 238000005266 casting Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 description 9
- 239000000956 alloy Substances 0.000 description 9
- 239000007787 solid Substances 0.000 description 9
- 239000011550 stock solution Substances 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 239000000243 solution Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Centrifugal Separators (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案はデカンタ型遠心分離機用スクリユウコ
ンベアの構造に関するものであり、更に詳細に
は、該スクリユウコンベアのらせん羽根（スクリ
ユウフライト）の先端に取付ける補強片の構造に
関するものである。[Detailed description of the invention] [Field of industrial application] The present invention relates to the structure of a screw conveyor for a decanter type centrifuge, and more specifically, the screw conveyor's spiral blade (screw flight). This relates to the structure of the reinforcing piece that is attached to the tip of the reinforcing piece.
デカンタ型遠心分離機用スクリユウコンベアの
らせん羽根の先端に耐摩耗性材料から成るチツプ
を取り付けるためにあり溝により継手部を利用す
ることが行なわれている（例えば、特公昭59−
15032号公報及び実開昭59−131256号公報参照）。
In order to attach a chip made of wear-resistant material to the tip of a screw conveyor for a decanter-type centrifuge, a joint part with a dovetail groove is used (for example,
(See Publication No. 15032 and Japanese Utility Model Application Publication No. 131256/1983).
また、耐摩耗性材料製の繊維布をらせん羽根の
先端に固定するために自溶性合金を使用したもの
もある（例えば、特開昭60−64656号公報参照）。 In addition, there is also one in which a self-fusing alloy is used to fix a fiber cloth made of a wear-resistant material to the tip of the spiral blade (see, for example, Japanese Patent Application Laid-Open No. 60-64656).
特公昭59−15032号公報及び実開昭59−131256
号公報に記載されたチツプ及びそのチツプを取り
付ける部材は厳密な寸法管理のもとで製作しなけ
ればならないから金型の製作費がかさむという問
題点があつた。
Special Publication No. 59-15032 and Utility Model Publication No. 59-131256
The chip described in the above publication and the parts to which the chip is attached must be manufactured under strict dimensional control, resulting in a problem in that the manufacturing cost of the mold increases.
特開昭60−64656号公報に記載されている自溶
性合金は鑞材であるから腐蝕性雰囲気のもとでは
侵され易く、またらせん羽根の先端に固着せしめ
られた耐摩耗性材料は該材料と自溶性合金との複
合層であるから硬度が低くなるという問題点があ
つた。 The self-fusing alloy described in JP-A-60-64656 is a brazing material, so it is easily corroded in a corrosive atmosphere, and the wear-resistant material fixed to the tip of the helical blade is Since it is a composite layer of a self-fusing alloy and a self-fusing alloy, there was a problem that the hardness was low.
本考案は、従来の技術の有するこのような問題
点に鑑みてなされたものであり、その目的とする
ところは、大幅なコスト・ダウンを実現し、チツ
プが高い硬度を保持し、しかも、チツプが離脱す
ることがないスクリユウコンベアを提供しようと
するものである。 The present invention was devised in view of these problems of the conventional technology, and its purpose is to achieve a significant cost reduction, maintain high hardness of the chip, and The aim is to provide a screw conveyor that will never fall off.
上記目的を達成するために、本考案のデカンタ
型遠心分離機用スクリユウコンベアは、回転軸の
外周面に取付けられたらせん羽根と、前記らせん
羽根の一面側の先端部に一列に互いに密接して配
置されるとともに前記らせん羽根に溶着された台
形乃至は扇形の多数の補強片とを有するデカンタ
型遠心分離機用スクリユウコンベアにおいて、前
記補強片は、前記らせん羽根に溶着された焼結あ
るいは鋳造された金属等の材料から成る基板と高
硬度材料から成るチツプとによつて構成されてお
り、前記基板はあり溝を具備する一方、前記チツ
プは前記あり溝に嵌合するほぼ鳩尾状の突部を具
備しており、前記基板と前記チツプ６２とは焼結
あるいは鋳ぐるみにより結合されており、かつチ
ツプに作用するモーメントによりチツプが基板か
ら抜け出るのを防ぐための(i)基板は半径方向内方
へ延在する半径方向の溝を備え、チツプは前記溝
内に挿入される板状部を備え、あるいは(ii)基板は
その表面側から裏面側へ近付くに従つて断面積が
大きくなるように壁面をテーパ面として形成した
あり溝を備え、チツプは前記あり溝の壁面に対応
するテーパ面を有するほぼ鳩尾状の突部を備えた
ことを特徴とする。
In order to achieve the above object, the screw conveyor for a decanter type centrifuge of the present invention has a helical blade attached to the outer peripheral surface of the rotating shaft and a tip portion of one side of the helical blade that is arranged in close contact with each other in a line. In the screw conveyor for a decanter-type centrifuge, the screw conveyor has a large number of trapezoidal or fan-shaped reinforcing pieces arranged in the same direction and welded to the helical blade, and the reinforcing piece is a sintered or fan-shaped reinforcing piece welded to the helical blade. It is composed of a substrate made of a material such as a cast metal and a chip made of a high-hardness material, and the substrate is provided with a dovetail groove, and the tip is provided with a dovetail-shaped substantially dovetail groove that fits into the dovetail groove. The substrate and the chip 62 are connected by sintering or casting, and in order to prevent the chip from coming out of the board due to the moment acting on the chip, (i) the board has a radius. (ii) the substrate has a radial groove extending inwardly, and the chip has a plate-shaped portion inserted into the groove; or (ii) the substrate has a cross-sectional area that increases from the front side toward the back side. The chip is characterized in that it has a dovetail groove whose wall surface is formed as a tapered surface, and the chip is provided with a substantially dovetail-shaped protrusion having a tapered surface corresponding to the wall surface of the dovetail groove.
基板とチツプとは焼結あるいは鋳ぐるみにより
直接的に結合されている。チツプは高硬度素材本
来の組成と硬度を保有しており、またチツプは基
板から離脱するおそれがない。
The substrate and chip are directly bonded by sintering or casting. The chip retains the original composition and hardness of the high-hardness material, and there is no risk of the chip coming off from the substrate.
以下、図面を参照して本考案の一実施例を説明
する。
An embodiment of the present invention will be described below with reference to the drawings.
第１２図は本考案よるスクリユウコンベアを装
備したデカンタ型遠心分離機の要部構造を示した
断面図であり、１は回転胴、２は回転胴１内に収
容されたスクリユウコンベアである。回転胴１の
一方の端部は傾斜した円錐形になつており、この
円錐形の胴部には固形物排出口１ａが設けられて
いる。スクリユウコンベア２は、中空の回転軸３
と回転軸３の外周面に取付けられたらせん羽根４
とから成つており、回転軸３内には原液（スラリ
ー等の固液混合物）を供給するための原液供給管
５が収容されており、原液供給管５は回転軸３の
一端において回転胴外の原液供給装置に接続され
ている。回転軸３の周面には原液排出孔３ａが貫
設されており、原液排出孔３ａを通つて回転軸３
内から回転胴１内へ原液が排出されるようになつ
ている。回転軸３は回転胴１よりも僅かに遅い速
度で回転されており、従つて回転胴１内で原液の
液分は図において左側に向つて送られ、原液中の
固形分は図において右側へ向つて送られる。らせ
ん羽根４の先端部の一面側（第１２図において右
側の面）には多数の補強片６がらせん羽根４の周
方向に沿つて１列に互いに密接して固着されてい
る。 FIG. 12 is a sectional view showing the main structure of a decanter-type centrifuge equipped with a screw conveyor according to the present invention, in which 1 is a rotary cylinder, and 2 is a screw conveyor housed in the rotary cylinder 1. . One end of the rotary barrel 1 has an inclined conical shape, and a solid material discharge port 1a is provided in this conical barrel. The screw conveyor 2 has a hollow rotating shaft 3
and a helical blade 4 attached to the outer peripheral surface of the rotating shaft 3.
A stock solution supply pipe 5 for supplying stock solution (a solid-liquid mixture such as slurry) is accommodated in the rotating shaft 3, and the stock solution supply pipe 5 is connected to the outside of the rotating body at one end of the rotating shaft 3. connected to the stock solution supply device. An undiluted solution discharge hole 3a is provided through the circumferential surface of the rotating shaft 3, and the undiluted solution discharge hole 3a passes through the undiluted solution discharge hole 3a.
The undiluted solution is discharged into the rotary cylinder 1 from inside. The rotating shaft 3 is rotated at a slightly slower speed than the rotating barrel 1, so the liquid content of the stock solution is sent to the left side in the figure within the rotating barrel 1, and the solid content in the stock solution is sent to the right side in the figure. sent towards. A large number of reinforcing pieces 6 are closely fixed to one side of the tip of the helical blade 4 (the right side in FIG. 12) in a row along the circumferential direction of the helical blade 4.
第１図乃至第６図は本考案の要部を成す補強片
６の第１実施例を示した図である。４はらせん羽
根、６は補強片である。補強片６は、らせん羽根
４の一面と先端面とに溶接部Ｗを以て固着された
基板６１（すなわちバツクアツププレート）と、
基板６１の表面側に焼結あるいは鋳ぐるみにより
結合されたチツプ６２とから構成されている。 1 to 6 are diagrams showing a first embodiment of the reinforcing piece 6 which constitutes the essential part of the present invention. 4 is a spiral blade, and 6 is a reinforcing piece. The reinforcing piece 6 includes a substrate 61 (i.e., a back-up plate) fixed to one surface and the tip surface of the helical blade 4 with a welded portion W;
It consists of a chip 62 bonded to the surface side of a substrate 61 by sintering or casting.
基板６１はステンレスもしくはその他の耐蝕合
金の粉末を焼結又は鋳造して構成されたものであ
り、第１実施例の基板６１は第１図乃至第３図に
示したように、その表面側（第２図ａ及び第３図
において右側の面）にらせん羽根４の面と平行な
第一の支持面６１ａを有するとともにらせん羽根
４の周方向と平行な第二の支持面６１ｂを有し、
更に、第一の支持面６１ａに連つて形成された半
径方向内方へ延在する半径方向の溝６１ｃと、第
二の支持面６１ｂの中央部に刻設されて第一の支
持面と直交する方向に延在するあり溝６１ｄとを
具備している。第一の支持面６１ａは第３図に示
すように基板６１の先端面に達しており、一方、
第二の支持面６１ｂは基板６１の両側面に達する
とともに第一の支持面６１ａに交わつているの
で、両支持面６１ａ及び６１ｂによつて基板６１
の先端は段状に切欠かれた形となつている。ま
た、第１図に示すように、溝６１ｃの巾はあり溝
６１ｄの巾よりも広く、かつ、その深さもあり溝
６１ｄの深さよりも深くなつている。あり溝６１
ｄは基板６１の表面（第３図において右側の面）
から溝６１ｃと交わる位置まで延在するとともに
基板６１の表面に開口しており、あり溝６１ｄは
基板６１の表面に対して直交する方向に延在して
いる。 The substrate 61 is constructed by sintering or casting powder of stainless steel or other corrosion-resistant alloy, and as shown in FIGS. 1 to 3, the substrate 61 of the first embodiment has its surface side ( It has a first support surface 61a parallel to the surface of the helical blade 4 (on the right side in FIGS. 2a and 3), and a second support surface 61b parallel to the circumferential direction of the helical blade 4,
Furthermore, a radial groove 61c extending radially inward is formed in connection with the first support surface 61a, and a radial groove 61c is carved in the center of the second support surface 61b and is perpendicular to the first support surface. It has a dovetail groove 61d extending in the direction. The first support surface 61a reaches the tip surface of the substrate 61 as shown in FIG.
Since the second support surface 61b reaches both side surfaces of the substrate 61 and intersects with the first support surface 61a, the substrate 61 is supported by both support surfaces 61a and 61b.
The tip has a step-like notch. Further, as shown in FIG. 1, the width of the groove 61c is wider than the width of the dovetail groove 61d, and its depth is also deeper than the depth of the dovetail groove 61d. Dovetail groove 61
d is the surface of the substrate 61 (the right side in FIG. 3)
The dovetail groove 61d extends in a direction perpendicular to the surface of the substrate 61, and is open to the surface of the substrate 61.
チツプ６２はタングステンカーバイドやセラミ
ツクスの如き高硬度素材の粉末をプレス成形しあ
るいは焼結したものであり、第４図乃至第６図に
示すように、基板６１の溝６１ｃ内に挿入される
板状部６２ａと、基板６１のあり溝６１ｄに嵌合
する鳩尾状の突部６２ｂと、基板６１の第一及び
第二の支持面６１ａ及び６１ｂに密接される頭部
６２ｃと段部６２ｅを具備している。 The chip 62 is made by press-molding or sintering powder of a highly hard material such as tungsten carbide or ceramics, and is a plate-shaped chip inserted into the groove 61c of the substrate 61, as shown in FIGS. 4 to 6. 62a, a dovetail-shaped protrusion 62b that fits into the dovetail groove 61d of the substrate 61, and a head portion 62c and a stepped portion 62e that are brought into close contact with the first and second support surfaces 61a and 61b of the substrate 61. ing.
基板６１とチツプ６２は溝６１ｃ及びあり溝６
１ｄ及び６１ｅにおいて互いに嵌合されていると
ともに、焼結あるいは鋳ぐるみにより結合されて
いる。基板６１とチツプ６２とが焼結あるいは鋳
ぐるみにより直接的に結合されていることは本考
案の特徴である。すなわち、補強片６を製作する
時には、まず、セラミツクもしくは超硬金属等の
粉末をプレス成形しあるいは焼結した後、それを
基板６１製作用の金型内に入れ、更にその金型内
にステンレス鋼もしくは耐蝕合金の粉末を充填し
て焼結し、あるいはステンレス鋼もしくは耐蝕合
金の溶湯を流しこんで一体として鋳ぐるむことに
より基板６１を製作する。従つて、チツプ６２の
鳩尾状の突部６２ｂは基板６１のあり溝６１ｄ及
び６１ｅに嵌合されるとともに、焼結あるいは鋳
ぐるみにより直接的に結合されており、基板６１
の支持面６１ａ及び６１ｂにおいても基板６１と
チツプ６２とは焼結あるいは鋳ぐるみにより直接
的に結合されている。 The substrate 61 and the chip 62 have a groove 61c and a dovetail groove 6.
They are fitted into each other at 1d and 61e, and are connected by sintering or casting. A feature of the present invention is that the substrate 61 and the chip 62 are directly connected by sintering or casting. That is, when manufacturing the reinforcing piece 6, first press-form or sinter powder of ceramic or cemented carbide, then put it into a mold for manufacturing the substrate 61, and then add stainless steel into the mold. The substrate 61 is manufactured by filling the powder with steel or corrosion-resistant alloy and sintering it, or by pouring molten stainless steel or corrosion-resistant alloy and casting it as one piece. Therefore, the dovetail-shaped protrusion 62b of the chip 62 is fitted into the dovetail grooves 61d and 61e of the substrate 61, and is directly connected to the substrate 61 by sintering or casting.
Also on the supporting surfaces 61a and 61b, the substrate 61 and the chip 62 are directly connected by sintering or casting.
鳩尾状の突部６２ｂの形状は種々の設計が可能
であり、鳩尾状の突部６２ｂが基板６１の一部に
より包囲されて遠心力の働く方向に抜去すること
ができない嵌合が得られる形状であればよく、例
えば円形あるいはそれに類似した形状をも含んで
いる。 The shape of the dovetail-shaped protrusion 62b can be designed in various ways, and the shape of the dovetail-shaped protrusion 62b can be such that it is surrounded by a part of the substrate 61 and cannot be removed in the direction of centrifugal force. It may be any shape, and includes, for example, a circular shape or a shape similar thereto.
前記の如き構造の補強片６においては、第２図
ａに示すように、らせん羽根４の面に対して直交
する方向の外力Ｆがチツプ６２に加わつてもチツ
プ６２が溝６１ｃにおいて基板６１に植え込まれ
た状態にあるため、チツプ６２が基板６１から抜
け出すことはない。 In the reinforcing piece 6 having the above-mentioned structure, as shown in FIG. Since the chip 62 is in an implanted state, it will not come out from the substrate 61.
これをふえんすると次のとおりである。第１２
図において、回転するスクリユウコンベア２が固
形分を左から右へ移動させる際、らせん羽根４の
先端に取り付けられているチツプ６２は固形分か
ら抵抗を受ける。第２図ｂにおいて、F1はチツ
プ６２の先端付近にある固形分S1がチツプ６２に
及ぼす力であり、F2は鳩尾状の突部６２ｂの下
部付近にある固形分S2がチツプ６２に及ぼす力で
あり、固形分S1とそれと同じ重量の固形分S2につ
いて考えると、固形分S1に働く遠心力の方が固形
分S2に働く遠心力よりも大きいからF1＞F2であ
る。F1とF2の大きさの違いに基づいて、チツプ
６２の重心の周りに反時計方向のモーメントＭが
作用する。これはチツプ６２を基板６１から離脱
させようとするモーメントである。そこで、チツ
プ６２が基板６１から抜け出るのを防ぐために、
チツプ６２に板状部６２ａを形成してこれを基板
６１の溝６１ｃに挿入したのである。 Adding this, the results are as follows. 12th
In the figure, when the rotating screw conveyor 2 moves the solids from left to right, the chips 62 attached to the tips of the spiral blades 4 receive resistance from the solids. In FIG. 2b, F 1 is the force exerted on the tip 62 by the solid content S 1 near the tip of the chip 62, and F 2 is the force exerted by the solid content S 2 near the bottom of the dovetail-shaped protrusion 62b on the chip 62. Considering the solid content S 1 and the solid content S 2 of the same weight, the centrifugal force acting on the solid content S 1 is greater than the centrifugal force acting on the solid content S 2 , so F 1 > F It is 2 . Based on the difference in magnitude between F 1 and F 2 , a counterclockwise moment M acts around the center of gravity of the chip 62 . This is the moment that tends to cause the chip 62 to separate from the substrate 61. Therefore, in order to prevent the chip 62 from coming out from the board 61,
A plate-like portion 62a is formed on the chip 62 and inserted into the groove 61c of the substrate 61.
第８図乃至第１１図は本考案の第２実施例の補
強片６Ａを示す。この実施例の基板６１Ａには前
記の溝６１ｃがなく、また第２実施例のチツプ６
２Ａには溝６１ｃに挿入すべき板状部６２ａがな
いことが第１実施例と異つており、更に、第２実
施例では、第８図乃第１１図に示されているよう
に、基板６１Ａの表面側から裏面側へ近付くに従
つてあり溝６１ｄの断面積が大きくなるようにあ
り溝６１ｄの各壁面がテーパ面として形成される
一方、あり溝６１ｄに嵌合するチツプ６２Ａの鳩
尾状の突部６２ｂの外壁面もあり溝６１ｄ及び６
１ｅの各壁面に対応したテーパ面として形成され
ていることを特徴としている。したがつて、チツ
プ６２Ａを基板６１Ａから離脱させようとするモ
ーメントＭが作用していても、チツプ６２Ａが基
板６１Ａから抜け出ることはない。 8 to 11 show a reinforcing piece 6A according to a second embodiment of the present invention. The substrate 61A of this embodiment does not have the groove 61c, and the chip 61A of the second embodiment does not have the groove 61c.
2A is different from the first embodiment in that there is no plate-shaped portion 62a to be inserted into the groove 61c, and furthermore, in the second embodiment, as shown in FIGS. Each wall surface of the dovetail groove 61d is formed as a tapered surface so that the cross-sectional area of the dovetail groove 61d increases as it approaches the back side from the front side of the dovetail groove 61A. There are also grooves 61d and 6 on the outer wall surface of the protrusion 62b.
It is characterized by being formed as a tapered surface corresponding to each wall surface of 1e. Therefore, even if a moment M is applied to cause the chip 62A to separate from the substrate 61A, the chip 62A will not come off from the substrate 61A.
（なお、第８図乃至第１１図において第１実施
例に示した部分と同じ部分については第１図乃至
第７図に示した符号で表示してあるが、これらの
同じ部分についての説明は必要がないかぎり省略
する。）
第２実施例の補強片６Ａは、第１実施例の場合
と同じく、基板６１Ａを焼結あるいは鋳造により
形成し、チツプ６２Ａを基板６１Ａ成形用金型内
に入れ、更にその金型内にステンレス鋼もしくは
耐蝕合金の粉末を充填して焼結し、あるいはステ
ンレス鋼もしくは耐蝕合金の溶湯を流しこんで一
体として鋳ぐるむことにより基板６１Ａを製作す
る。 (In addition, in FIGS. 8 to 11, the same parts as those shown in the first embodiment are indicated by the symbols shown in FIGS. 1 to 7, but the explanations for these same parts are as follows. (Omitted unless necessary.) The reinforcing piece 6A of the second embodiment is formed by sintering or casting the substrate 61A, as in the case of the first embodiment, and inserting the chip 62A into the mold for forming the substrate 61A. Then, the substrate 61A is manufactured by filling the mold with powder of stainless steel or corrosion-resistant alloy and sintering it, or by pouring molten stainless steel or corrosion-resistant alloy and casting it as one piece.
〔考案の効果〕
チツプ６２に板状部６２ａを基板６１の溝６
１ｃ内に挿入する構造、あるいは基板６１Ａは
その表面側から裏面側へ近付くに従つて断面積
が大きくなるように壁面をテーパ面として形成
したあり溝６１ｄ及び６１ｅを備えチツプ６２
Ａは前記あり溝の壁面に対応するテーパ面を有
するほぼ鳩尾状の突部６２ｂを備えた構造を有
するので、チツプ６２，６２Ａが基板６１，６
１Ａから抜け出るおそれはない。[Effect of the invention] The plate-shaped portion 62a is attached to the chip 62 in the groove 6 of the substrate 61.
The structure to be inserted into the chip 1c or the substrate 61A includes dovetail grooves 61d and 61e whose walls are tapered so that the cross-sectional area increases from the front side to the back side of the chip 62.
A has a structure including a substantially dovetail-shaped protrusion 62b having a tapered surface corresponding to the wall surface of the dovetail groove, so that the chips 62, 62A are connected to the substrates 61, 6.
There is no risk of breaking out of 1A.
基板６１，６１Ａとチツプ６２，６２Ａとを
焼結あるいは鋳ぐるみにより直接的に結合せし
めた構造になつているから、厳密な寸法管理の
もとで金型を製作する必要がない。これにより
大幅なコスト・ダウンが可能である。 Since the structure is such that the substrates 61, 61A and the chips 62, 62A are directly bonded by sintering or casting, there is no need to manufacture a mold under strict dimensional control. This allows for significant cost reduction.
基板６１，６１Ａとチツプ６２，６２Ａとは
焼結あるいは鋳ぐるみにより直接的に結合され
ているから、高硬度素材本来の組成を以てその
組成を変じない製法で作られたチツプ６２，６
２Ａは本来の硬度を保有したままであり耐摩耗
性が優れている。 Since the substrates 61, 61A and the chips 62, 62A are directly bonded by sintering or casting, the chips 62, 6 are made using a manufacturing method that does not change the original composition of the high-hardness material.
2A retains its original hardness and has excellent wear resistance.
第１図は本考案のスクリユウコンベアに装備し
た補強片の第１実施例の正面図、第２図ａは第１
図の側面図、第２図ｂはチツプに働く力を示す説
明図、第３図は補強片の基板の中央部断面図、第
４図は補強片のチツプの正面図、第５図は第４図
の側面図、第６図はチツプの正面斜視図、第７図
は本考案の補強片の第２実施例の正面図、第８図
は第７図の側面図、第９図は第７図の−矢視
断面図、第１０図は第７図の補強片の基板の−
矢視縦断面図、第１１図は第７図の補強片のチ
ツプの正面斜視図、第１２図は本考案のスクリユ
ウコンベアを装備したデカンタ型遠心分離機の一
部の縦断面図である。
４……らせん羽根、６，６Ａ……補強片、６
１，６１Ａ……基板、６２，６２Ａ……チツプ、
６１ｃ……溝、６１ｄ……あり溝、６１ｅ……あ
り溝、６２ａ……板状部、６２ｂ……鳩尾状の突
部。
Figure 1 is a front view of the first embodiment of the reinforcing piece installed in the screw conveyor of the present invention, and Figure 2a is the front view of the first embodiment of the reinforcing piece installed in the screw conveyor of the present invention.
Fig. 2b is an explanatory diagram showing the force acting on the chip, Fig. 3 is a sectional view of the central part of the substrate of the reinforcing piece, Fig. 4 is a front view of the chip of the reinforcing piece, and Fig. 5 is an explanatory diagram showing the force acting on the chip. 4 is a side view, FIG. 6 is a front perspective view of the chip, FIG. 7 is a front view of the second embodiment of the reinforcing piece of the present invention, FIG. 8 is a side view of FIG. 7, and FIG. 9 is a front perspective view of the chip. Fig. 7 is a sectional view taken in the direction of the arrow, and Fig. 10 is a - sectional view of the reinforcing piece substrate in Fig. 7.
Fig. 11 is a front perspective view of the chip of the reinforcing piece shown in Fig. 7, and Fig. 12 is a longitudinal sectional view of a portion of a decanter type centrifuge equipped with the screw conveyor of the present invention. . 4...Spiral blade, 6,6A...Reinforcement piece, 6
1,61A...board, 62,62A...chip,
61c...Groove, 61d...Dovetail groove, 61e...Dovetail groove, 62a...Plate-shaped portion, 62b...Dovetail-shaped protrusion.
Claims (1)
と、前記らせん羽根４の一面側の先端部に一列に
互いに密接して配置されるとともに前記らせん羽
根に溶着された台形乃至は扇形の多数の補強片
６，６Ａとを有するデカンタ型遠心分離機用スク
リユウコンベアにおいて、前記補強片６は前記ら
せん羽根に溶着された焼結あるいは鋳造された金
属等の材料から成る基板６１，６１Ａと高硬度材
料から成るチツプ６２，６２Ａとによつて構成さ
れており、前記基板６１，６１Ａはあり溝６１ｄ
及び６１ｅを具備する一方、前記チツプ６２，６
２Ａは前記あり溝に嵌合するほぼ鳩尾状の突部６
２ｂを具備しており、前記基板６１，６１Ａと前
記チツプ６２，６２Ａとは焼結あるいは鋳ぐるみ
により結合されており、かつチツプ６２，６２Ａ
に作用するモーメントＭによりチツプ６２，６２
Ａが基板６１，６１Ａから抜け出るのを防ぐため
の次の(i)あるいは(ii)の構造を備えたことを特徴と
するデカンタ型遠心分離機用スクリユウコンベ
ア。 (i) 基板６１は半径方向内方へ延在する半径方向
の溝６１ｃを備え、チツプ６２は前記溝６１ｃ
内に挿入される板状部６２ａを備えたこと。 (ii) 基板６１Ａはその表面側から裏面側へ近付く
に従つて断面積が大きくなるように壁面をテー
パ面として形成したあり溝６１ｄ及び６１ｅを
備え、チツプ６２Ａは前記あり溝の壁面に対応
するテーパ面を有するほぼ鳩尾状の突部６２ｂ
を備えたこと。[Claims for Utility Model Registration] Helical blade 4 attached to the outer peripheral surface of the rotating shaft
and a large number of trapezoidal or sector-shaped reinforcing pieces 6, 6A arranged in a row in close contact with each other at the tip of one side of the helical blade 4 and welded to the helical blade. In the screw conveyor, the reinforcing piece 6 is composed of a substrate 61, 61A made of a material such as sintered or cast metal, which is welded to the helical blade, and a chip 62, 62A made of a high hardness material. The substrates 61, 61A have dovetail grooves 61d.
and 61e, while the chips 62, 6
2A is a substantially dovetail-shaped protrusion 6 that fits into the dovetail groove.
2b, the substrates 61, 61A and the chips 62, 62A are connected by sintering or casting, and the chips 62, 62A are connected to each other by sintering or casting.
Due to the moment M acting on the chips 62, 62
A screw conveyor for a decanter-type centrifuge, characterized by having the following structure (i) or (ii) for preventing A from slipping out from the substrates 61, 61A. (i) The substrate 61 is provided with a radial groove 61c extending radially inward, and the chip 62 is provided with a radial groove 61c extending radially inward.
A plate-shaped portion 62a is provided to be inserted into the interior. (ii) The substrate 61A is provided with dovetail grooves 61d and 61e whose wall surfaces are tapered so that the cross-sectional area increases from the front side toward the back side, and the chip 62A corresponds to the wall surface of the dovetail grooves. Approximately dovetail-shaped protrusion 62b having a tapered surface
It was equipped with the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985140629U JPS6331710Y2 (en) | 1985-09-13 | 1985-09-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985140629U JPS6331710Y2 (en) | 1985-09-13 | 1985-09-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6259155U JPS6259155U (en) | 1987-04-13 |
| JPS6331710Y2 true JPS6331710Y2 (en) | 1988-08-24 |
Family
ID=31047653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985140629U Expired JPS6331710Y2 (en) | 1985-09-13 | 1985-09-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6331710Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5915032A (en) * | 1982-07-15 | 1984-01-26 | 松田 雅也 | Welding machine for cutting thread for opening cover of vessel for packing made of synthetic resin |
| JPS6064656A (en) * | 1983-09-16 | 1985-04-13 | Mitsubishi Kakoki Kaisha Ltd | Screw blade of centrifugal separator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59131256U (en) * | 1983-02-24 | 1984-09-03 | 石川島播磨重工業株式会社 | mass transfer equipment |
-
1985
- 1985-09-13 JP JP1985140629U patent/JPS6331710Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5915032A (en) * | 1982-07-15 | 1984-01-26 | 松田 雅也 | Welding machine for cutting thread for opening cover of vessel for packing made of synthetic resin |
| JPS6064656A (en) * | 1983-09-16 | 1985-04-13 | Mitsubishi Kakoki Kaisha Ltd | Screw blade of centrifugal separator |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6259155U (en) | 1987-04-13 |
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