JP3220442B2 - Filter element - Google Patents
Filter elementInfo
- Publication number
- JP3220442B2 JP3220442B2 JP31428799A JP31428799A JP3220442B2 JP 3220442 B2 JP3220442 B2 JP 3220442B2 JP 31428799 A JP31428799 A JP 31428799A JP 31428799 A JP31428799 A JP 31428799A JP 3220442 B2 JP3220442 B2 JP 3220442B2
- Authority
- JP
- Japan
- Prior art keywords
- filter
- filter medium
- holding plate
- filter element
- support
- 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 - Fee Related
Links
Description
【０００１】[0001]
【発明の属する技術分野】本発明はグラスウール又は不
織布を圧縮してなる濾材を使用したフィルタエレメント
に係り、その目的は圧延工程、ホーミング、工作機で潤
滑油として用いる純鉱物油を好適に濾過することがで
き、目詰まりを起こしにくく、逆洗時にグラスウール又
は不織布が濾材から剥離することがなく、長期間使用で
きるフィルタエレメントを提供することにある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter element using a filter medium obtained by compressing glass wool or a nonwoven fabric, and the purpose thereof is to suitably filter pure mineral oil used as a lubricating oil in a rolling process, homing, and a machine tool. An object of the present invention is to provide a filter element which can be used for a long time without causing clogging, preventing glass wool or nonwoven fabric from peeling off from a filter medium during backwashing.
【０００２】[0002]
【従来の技術】従来より、汚濁液から清浄液を得る方法
として、濾過法が用いられているが、その目的に応じて
さまざまな濾過法が開発されている。このなかで、機械
油に入り込んだミクロン単位の金属屑を取り除くのに適
した精密濾過法の一つに、毛管浸透濾過と呼ばれる方法
がある。この毛管浸透濾過とは例えば特公昭４４−１６
８７０号公報にも記載されている通り、濾材が被濾過液
と接する接液面に大きな付着面及び該付着面に連なる多
数の毛細管路を有する肉厚浸透濾材を使用し、分離すべ
き夾雑物が前記付着面に付着し、濾液のみが毛管を通り
濾材を通過するような微少濾過圧により濾過を行う方法
である。この方法では、濾材として微細繊維を堆積させ
て塊状に成形した肉厚浸透濾材を用い、この濾材に金属
屑を含んだ機械油を毛管浸透速度以下の速度で通過させ
ることにより濾材の表面に夾雑物を付着させ、濾材表面
に付着した夾雑物は凝集して径大となると自重により濾
過層の底部に沈降するようにされていた（特公昭４４−
３３６６８号）。このような濾過で用いるフィルタユニ
ットとしては以下のようなものが考えられる。すなわち
パイプ状の支持体（ａ）にフェノール（ｂ）でコーティ
ングした溶融ガラスを細く垂らし（ｃ）て支持体（ａ）
にガラス繊維を付着させ、このガラス繊維を堆積させて
濾材層（ｄ）としたものが挙げられる（図７参照）。し
かしながらこの方法では機械油の濾過速度が毛管浸透速
度を越えてしまった場合、濾過材内部に夾雑物が大量に
入り込んでしまって濾材内部で目詰まりをおこし、濾材
そのものが使用できなくなるという欠点がある。2. Description of the Related Art Conventionally, a filtration method has been used as a method for obtaining a cleaning liquid from a contaminated liquid. Various filtration methods have been developed according to the purpose. Among these, one of the microfiltration methods suitable for removing micron-scale metal dust that has entered machine oil is a method called capillary permeation filtration. This capillary permeation filtration is described, for example, in JP-B-44-16.
As described in Japanese Patent Application Publication No. 870, a thick permeation filter medium having a large attachment surface on the liquid contact surface where the filter material comes into contact with the liquid to be filtered and a large number of capillary channels connected to the attachment surface is used to separate contaminants to be separated. Is a method in which filtration is performed with a microfiltration pressure such that only the filtrate adheres to the attachment surface and only the filtrate passes through the capillary through the filter medium. In this method, a thick permeation filter medium formed by depositing fine fibers as a filter medium and forming a lump is used, and machine oil containing metal chips is passed through the filter medium at a speed equal to or lower than the capillary permeation speed, thereby contaminating the surface of the filter medium. The contaminants adhering to the surface of the filter medium are settled at the bottom of the filter layer under their own weight when they become large in diameter (Japanese Patent Publication No. 44-19764).
No. 33668). The following can be considered as a filter unit used for such filtration. That is, the molten glass coated with phenol (b) is thinly dropped on the pipe-shaped support (a) (c), and the support (a) is formed.
A glass fiber is attached to the filter material, and the glass fiber is deposited to form a filter medium layer (d) (see FIG. 7). However, this method has the disadvantage that if the filtration rate of the machine oil exceeds the capillary penetration rate, a large amount of contaminants enter the inside of the filter medium, causing clogging inside the filter medium and making the filter medium itself unusable. is there.
【０００３】また、一旦濾過層底部に沈降した夾雑物が
被濾過液の流れに乗って舞い上がり、再び濾過材表面に
付着するため、次第に濾材の表面で目詰まりが起こるよ
うになり、結局一定周期毎に濾過材及び濾過槽を洗浄す
る必要がある。濾過材の一般的な洗浄方法として圧縮空
気による逆洗が挙げられる。この方法は濾過中の被処理
液の流入方向とは逆向きに圧縮空気を流出させることに
より濾過材の表面に付着した夾雑物を剥離させるという
ものである。しかしながら、上記したような微細繊維を
圧縮成形した濾材を使用したフィルタの場合、逆洗時に
夾雑物が剥離すると共に濾材を構成する微細繊維まで剥
離してしまい、濾過能力が低下してしまう。この原因
は、この濾材は圧縮成形されたものであるから微細繊維
間に若干の反発力が残っている事である。濾過中であれ
ば被処理液に加えるわずかな濾過圧により濾材は濾過機
自体に押し付けられ、元の形状を保つが、逆洗時には繊
維間に残る反発力と同方向に圧縮空気が流出するため、
濾材は元の形状を維持できなくなる。このため、毛管浸
透濾過法における濾材は圧縮空気による逆洗が行えず、
使い捨てか、或いは極めて少ない回数のみ逆洗が行われ
ていた。[0003] In addition, the contaminants that have settled at the bottom of the filtration layer soar along with the flow of the liquid to be filtered and adhere to the surface of the filter medium again. As a result, clogging gradually occurs on the surface of the filter medium. It is necessary to wash the filter medium and the filter tank each time. As a general method for washing the filter medium, back washing with compressed air can be mentioned. In this method, contaminants adhering to the surface of the filtration material are separated by discharging compressed air in a direction opposite to the flow direction of the liquid to be treated during filtration. However, in the case of a filter using a filter medium obtained by compression-molding fine fibers as described above, impurities are peeled off at the time of backwashing, and fine fibers constituting the filter medium are also peeled off, so that the filtering ability is reduced. The reason for this is that since this filter medium is formed by compression molding, a slight repulsive force remains between the fine fibers. During filtration, the filter medium is pressed against the filter itself by the slight filtration pressure applied to the liquid to be treated, and retains its original shape.However, at the time of back washing, compressed air flows out in the same direction as the repulsive force remaining between the fibers. ,
The filter media cannot maintain its original shape. Therefore, the filter medium in the capillary permeation filtration method cannot be backwashed with compressed air,
It was disposable or backwashed only a very small number of times.
【０００４】[0004]
【発明が解決しようとする課題】上記従来技術に鑑み、
この発明は好適に濾過を行うことができ且つ毛管浸透速
度以上で速度で濾過してしまった場合にも濾材内部に夾
雑物が入り込みにくく、圧縮空気による逆洗を繰り返し
行っても濾過能力が低下しない毛管浸透濾過用のフィル
タエレメントの提供を課題とする。In view of the above prior art,
According to the present invention, it is possible to preferably perform filtration, and even if filtration is performed at a speed higher than the capillary permeation speed, it is difficult for impurities to enter the inside of the filter medium, and the filtration ability is reduced even if backwashing with compressed air is repeated. It is an object of the present invention to provide a filter element for capillary permeation filtration that does not require a filter.
【０００５】[0005]
【課題を解決するための手段】本発明は上記課題を解決
するためになされたものであって、請求項１に係る発明
は、少なくとも支持体及び濾過材層を有し、毛管浸透速
度にて濾過を行うフィルタエレメントであり、このフィ
ルタエレメントは圧延工程、ホーミング、工作機で潤滑
油として用いる純鉱物油の濾過に用いるものであり、濾
過材層は濾面及び滲出面を有し、濾面は被処理液と接す
るようにされ、滲出面側に濾液室が配置され、すなわち
被処理液が濾面から濾過材層を通り滲出面から滲出され
て濾液室に導入されるように構成され、濾過材層を構成
する濾材として、ＪＩＳＫ−２２７６規定の試験方法で
９３％以上の夾雑物除去率を有する様に予め積層方向に
圧縮されたグラスウール又は不織布の積層体を用いた、
フィルタエレメントであって、濾材は圧縮方向への変形
が抑えられる様に支持体により支持され、且つ濾面及び
滲出面は濾材の圧縮方向と略平行にされ、すなわち濾面
から滲出面へ流れる被処理液の流入方向は濾過材の圧縮
方向と略直交するようにされており、前記濾材を構成す
るグラスウール又は不織布は、繊維間の摩擦力が逆洗時
の圧縮空気による剥離力よりも強力となるように圧縮さ
れていることを特徴とするフィルタエレメントに関す
る。請求項２に係る発明は、支持体及び濾過材層からな
り、毛管浸透速度にて濾過を行うフィルタエレメントで
あって、このフィルタエレメントは圧延工程、ホーミン
グ、工作機で潤滑油として用いる純鉱物油の濾過に用い
るものであり、支持体は支持管、底部挟持板、上部挟持
板、ナットからなり、支持管の一端側には底部挟持板が
固着され且つ他端側はナットと螺合可能であるようにさ
れ、支持管はその外周から管内に向かって液体が流入可
能であるようにされ、上部挟持板は支持管に遊嵌可能で
あるようにされ、濾材として、ＪＩＳＫ−２２７６規定
の試験方法で９３％以上の夾雑物除去率を有する様に予
め積層方向に圧縮されたグラスウール又は不織布の積層
体を用いて、この濾材には中央部に滲出孔が設けられ、
前記滲出孔には前記支持管が挿通され、この濾材は上部
挟持板と底部挟持板の間に挟持され、ナットにより前記
上部挟持板と底部挟持板の間が広がらない様に挟持状態
が保持され、前記滲出孔は濾材の圧縮方向と略平行に穿
孔されており、前記濾材を構成するグラスウール又は不
織布は繊維間の摩擦力が逆洗時の圧縮空気による剥離力
よりも強力となるように圧縮されていることを特徴とす
るフィルタエレメントに関する。Means for Solving the Problems The present invention has been made to solve the above problems, and the invention according to claim 1 has at least a support and a filter medium layer, and has a capillary penetration speed. A filter element for filtering, the filter element is used for filtering a pure mineral oil used as a lubricating oil in a rolling process, homing, and a machine tool, and a filter material layer has a filter surface and a leaching surface; Is configured to be in contact with the liquid to be treated, the filtrate chamber is disposed on the leaching surface side, that is, the liquid to be treated is leached from the leaching surface through the filter medium layer from the filter surface and introduced into the filtrate chamber, As a filter medium constituting the filter medium layer, a test method specified in JIS K-2276 is used.
Using a laminate of glass wool or a nonwoven fabric which has been compressed in the lamination direction in advance so as to have a contaminant removal rate of 93% or more ,
A filter element, wherein a filter medium is supported by a support so that deformation in a compression direction is suppressed, and a filter surface and an exuding surface are substantially parallel to the compression direction of the filter medium, that is, a filter flowing from the filter surface to the exuding surface. The inflow direction of the treatment liquid is set to be substantially orthogonal to the compression direction of the filter medium, and the glass wool or the nonwoven fabric constituting the filter medium has a frictional force between fibers that is stronger than a peeling force due to compressed air during backwashing. To a filter element characterized in that the filter element is compressed as follows. The invention according to claim 2 is a filter element comprising a support and a filter medium layer, and performing filtration at a capillary penetration speed, wherein the filter element is a pure mineral oil used as a lubricating oil in a rolling process, homing, and a machine tool. The support is composed of a support tube, a bottom holding plate, an upper holding plate, and a nut. A bottom holding plate is fixed to one end of the support tube, and the other end can be screwed with the nut. is located way, the support tube is liquid toward the tube from its outer periphery is so can flow, the upper clamping plate being adapted be loosely fitted into the support tube, as filter media, JISK-2276 defined
Using the test method in compressed pre <br/> Me stacking direction so as to have 93% or more contaminants removal rate was glass wool or laminate of nonwoven, oozing hole is provided in the central portion in the filter medium ,
The support tube is inserted through the exudation hole, the filter medium is clamped between an upper clamping plate and a bottom clamping plate, and a nut is maintained in a clamping state so as not to spread between the upper clamping plate and the bottom clamping plate. Is perforated substantially parallel to the compression direction of the filter medium, and the glass wool or the nonwoven fabric constituting the filter medium is compressed so that the frictional force between the fibers becomes stronger than the peeling force due to the compressed air at the time of backwashing. And a filter element.
【０００６】[0006]
【発明の実施の形態】以下、本発明に係るフィルタエレ
メントの実施形態について図面に基づき説明する。図１
は本発明に係るフィルタエレメントの外観斜視図であ
り、図２は本発明に係るフィルタエレメントの支持体の
外観斜視図である。図３は本発明に使用可能な濾材の積
層構造を示す模式図であり、図４は濾材の圧縮方向と被
処理液の流入方向の関係を示す模式図である。図５は濾
材の圧縮方向と垂直な面の形状を示す模式図であり、図
６は濾材の圧縮方向と平行な面の形状を示す模式図であ
る。また、図８、図９、図１０は圧力損失に関する試験
例の試験結果を示す表である。図中、（１）はフィルタ
エレメントであり、（２）は支持体であり、（３）は濾
過材層であり、（４）は濾液室である。（２ａ）は支持
体（２）の支持管であり、（２ｂ）は底部挟持板であ
り、（２ｃ）は上部挟持板であり、（２ｄ）はナットで
ある。（３ａ）は濾過材層（３）を構成する濾材であ
り、（３ｂ）は濾面であり、（３ｃ）は滲出面であり、
（３ｄ）はガラス繊維である。なお、（５）は濾過材の
圧縮方向を示す矢印であり、（６）は被処理液の流入方
向を示す矢印である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a filter element according to the present invention will be described below with reference to the drawings. FIG.
FIG. 2 is an external perspective view of a filter element according to the present invention, and FIG. 2 is an external perspective view of a support of the filter element according to the present invention. FIG. 3 is a schematic view showing a laminated structure of a filter medium usable in the present invention, and FIG. 4 is a schematic view showing a relationship between a compression direction of the filter medium and an inflow direction of a liquid to be treated. FIG. 5 is a schematic diagram illustrating a shape of a surface perpendicular to the compression direction of the filter medium, and FIG. 6 is a schematic diagram illustrating a shape of a surface parallel to the compression direction of the filter medium. 8, 9 and 10 are tables showing test results of test examples relating to pressure loss. In the figure, (1) is a filter element, (2) is a support, (3) is a filter medium layer, and (4) is a filtrate chamber. (2a) is a support tube of the support (2), (2b) is a bottom holding plate, (2c) is an upper holding plate, and (2d) is a nut. (3a) is a filter medium constituting the filter medium layer (3), (3b) is a filter surface, (3c) is a seepage surface,
(3d) is a glass fiber. In addition, (5) is an arrow indicating the compression direction of the filtering material, and (6) is an arrow indicating the inflow direction of the liquid to be treated.
【０００７】以下、図面に基づいて、本願発明のフィル
タエレメントについて、詳細に説明する。本件発明のフ
ィルタエレメント（１）は支持体（２）及び濾過材層
（３）を有する。このうち濾過材層（３）は圧縮された
グラスウールからなる濾材（３ａ）により形成される。
この発明で使用される濾材（３ａ）は例えば図３に記載
されるような方法で作成される。つまり、グラスウール
を所定の大きさに切断されたブロックとし（図３の
ａ）、次にこのブロックを重ね合わせて重積方向に圧縮
し（図３のｂ）、濾材（３ａ）を得る方法が例示でき
る。なお、一方向のみに圧縮されている限り、いずれの
方法を用いてもこの発明の目的は達成できる。また、グ
ラスウールに代えて不織布を使用してもこの発明の目的
は達成できる。Hereinafter, the filter element of the present invention will be described in detail with reference to the drawings. The filter element (1) of the present invention has a support (2) and a filter medium layer (3). The filter medium layer (3) is formed of a filter medium (3a) made of compressed glass wool.
The filter medium (3a) used in the present invention is prepared, for example, by a method as shown in FIG. That is, glass wool is made into a block cut into a predetermined size (FIG. 3A), and then the blocks are overlapped and compressed in the direction of stacking (FIG. 3B) to obtain a filter medium (3a). Can be illustrated. Note that the object of the present invention can be achieved by any method as long as the compression is performed in only one direction. Further, the object of the present invention can be achieved by using a nonwoven fabric instead of glass wool.
【０００８】この発明において、支持体（２）は主に濾
材（３ａ）の圧縮方向への変形を抑えるように構成され
る。そのために例えば２枚の板で濾材（３ａ）を挟み込
み、固定具で２枚の板の間が広がらない様にする方法が
採用できる。具体的には図２に示されるような支持管
（２ａ）、底部挟持板（２ｂ）、上部挟持板（２ｃ）、
ナット（２ｄ）からなる支持体（２）により濾材（３
ａ）を支持する方法を実施例として例示する。この支持
体（２）において支持管（２ａ）の一端側には底部挟持
板（２ｂ）が固着されている。上部挟持板（２ｃ）は支
持管（２ａ）に遊嵌可能であるように、具体的には中央
部に孔が設けられこの孔に支持管（２ａ）が挿入できる
ようにされている。支持管（２ａ）の他端側はナット
（２ｄ）と螺合可能であるようにされ、支持管（２ａ）
はその外周から管内に向かって液体が流入可能であるよ
うに流入孔が穿孔されている。In the present invention, the support (2) is mainly configured to suppress deformation of the filter medium (3a) in the compression direction. For this purpose, for example, a method can be adopted in which the filter medium (3a) is sandwiched between two plates, and the space between the two plates is not widened by a fixing tool. Specifically, as shown in FIG. 2, a support tube (2a), a bottom holding plate (2b), an upper holding plate (2c),
The filter medium (3) is supported by the support (2) composed of the nut (2d).
The method for supporting a) is illustrated as an example. In this support (2), a bottom holding plate (2b) is fixed to one end of the support tube (2a). The upper holding plate (2c) is provided with a hole in the center so that the support tube (2a) can be loosely fitted into the support tube (2a), and the support tube (2a) can be inserted into this hole. The other end of the support tube (2a) is adapted to be screwable with the nut (2d), and the support tube (2a)
The inflow hole is perforated so that the liquid can flow from the outer periphery toward the inside of the tube.
【０００９】この実施例においては中央部に滲出孔が設
けられた濾材（３ａ）が使用され、滲出孔の内部が濾液
室（４）とされる。なお、この滲出孔はグラスウールの
圧縮方向と平行に穿孔されている。上記支持管（２ａ）
には滲出孔が穿孔された濾材（３ａ）が嵌入されるが、
所定数の濾材（３ａ）が嵌入された後、濾材（３ａ）の
上に上部挟持板（２ｃ）が嵌入される。その後、ナット
（２ｄ）と支持管（２ａ）の他端とが螺合されることに
より底部挟持板（２ｂ）と上部挟持板（２ｃ）の間が広
がらない様にされる。図１及び図２に記載の実施例では
上記の様にして濾材（３ａ）の圧縮方向への変形を抑え
られるが、その他の方法により変形を防止する構成を採
用しても本件発明の技術範囲に含まれる。In this embodiment, a filter medium (3a) having an exudation hole in the center is used, and the inside of the exudation hole is used as a filtrate chamber (4). The exudation hole is formed in parallel with the compression direction of the glass wool. The support tube (2a)
A filter medium (3a) with a perforated hole is inserted into
After a predetermined number of filter media (3a) are inserted, the upper holding plate (2c) is inserted over the filter media (3a). Thereafter, the nut (2d) and the other end of the support tube (2a) are screwed together so that the space between the bottom holding plate (2b) and the upper holding plate (2c) does not spread. In the embodiment shown in FIGS. 1 and 2, the deformation of the filter medium (3a) in the compression direction can be suppressed as described above. However, the technical scope of the present invention can be achieved by adopting a structure for preventing the deformation by other methods. include.
【００１０】濾過材層（３）の表面は図４に例示される
通り被処理液と接する面が濾面（３ｂ）とされ、濾過済
みの濾液と接する面が滲出面（３ｃ）とされる。図１及
び図２に記載した実施例では濾材（３ａ）が肉厚管状に
形成されているが、その外周面側が濾面（３ｂ）とさ
れ、内周面側が滲出面（３ｃ）とされている。この濾材
（３ａ）は肉厚管の長さ方向に圧縮されているため、濾
面（３ｂ）及び滲出面は圧縮方向に対し平行である。つ
まり、この発明において濾液は濾面（３ｂ）から滲出面
（３ｃ）に向かって流れるため、濾液は濾材（３ａ）の
圧縮方向に対し、略直交するように流れることになる。As shown in FIG. 4, the surface of the filter medium layer (3) has a surface in contact with the liquid to be treated as a filter surface (3b), and a surface in contact with the filtered filtrate has a leaching surface (3c). . In the embodiment described in FIGS. 1 and 2, the filter medium (3a) is formed in a thick tubular shape, but the outer peripheral surface side is a filter surface (3b), and the inner peripheral surface side is a seepage surface (3c). I have. Since this filter medium (3a) is compressed in the length direction of the thick tube, the filter surface (3b) and the exuding surface are parallel to the compression direction. That is, in the present invention, since the filtrate flows from the filter surface (3b) toward the seepage surface (3c), the filtrate flows substantially orthogonally to the compression direction of the filter medium (3a).
【００１１】この発明のフィルタエレメント（１）は上
記のように構成されているため、処理液の速度が毛管浸
透速度を越えてしまった場合でも、濾材（３ａ）内に夾
雑物が入り込みにくい。すなわち、濾材（３ａ）の圧縮
方向は被処理液の流入方向（６）と略直交する様にされ
ているためガラス繊維（３ｄ）同士が互いに密着し、被
処理液の入口は流入方向（６）と略平行に圧縮した場合
と比較して非常に小さくなっている（図５及び図６参
照）。このため、夾雑物はこの入口にある程度阻まれて
濾材（３ａ）内部には入りにくくなる。なお、濾材（３
ａ）表面に形成される被処理液の入口の大きさは濾材
（３ａ）を圧縮する圧力により変化する。すなわち濾材
（３ａ）を圧縮する圧力を大きくすればするほど被処理
液の入口は狭くなり、これにより径が小さな夾雑物を除
去できるようになる一方、濾過速度は低下する。このた
め、濾材（３ａ）を圧縮する圧力は除去すべき夾雑物の
径と必要な濾過速度を勘案し、適宜定めればよい。ま
た、逆洗時にも濾材（３ａ）を構成するガラス繊維が濾
材（３ａ）から剥離する危険性が少ない。すなわち、濾
材（３ａ）は支持体（２）により圧縮方向への変形が抑
えられる様に支持されているので、ガラス繊維の圧力方
向への移動は支持体（２）により遮られる。さらに、濾
材（３ａ）は圧縮されているためこのガラス繊維間の摩
擦力は強く、逆洗時の圧縮空気による剥離力よりも強力
になっている。したがって、逆洗時であっても圧縮方向
と略直交する方向へのガラス繊維の移動は前記摩擦力に
より抑えられる。従って、逆洗時であってもガラス繊維
は剥離せず、フィルタエレメント（１）が目詰まりを起
こした場合でも逆洗を行なうことにより繰り返し使用す
ることができる。[0011] Since the filter element (1) of the present invention is configured as described above, even when the processing solution speed exceeds the capillary permeation speed, impurities are unlikely to enter the filter medium (3a). That is, since the compression direction of the filter medium (3a) is substantially orthogonal to the inflow direction (6) of the liquid to be treated, the glass fibers (3d) are in close contact with each other, and the inlet of the liquid to be treated is in the inflow direction (6). ) Is very small as compared with the case where it is compressed substantially in parallel (see FIGS. 5 and 6). For this reason, the impurities are hindered to some extent by this inlet, and are less likely to enter the inside of the filter medium (3a). The filter media (3
a) The size of the inlet of the liquid to be treated formed on the surface changes depending on the pressure for compressing the filter medium (3a). That is, as the pressure for compressing the filter medium (3a) is increased, the inlet of the liquid to be treated becomes narrower, so that impurities having a small diameter can be removed, but the filtration rate decreases. For this reason, the pressure for compressing the filter medium (3a) may be appropriately determined in consideration of the diameter of the contaminants to be removed and the required filtration speed. In addition, there is little danger that the glass fibers constituting the filter medium (3a) will peel off from the filter medium (3a) even during backwashing. That is, since the filter medium (3a) is supported by the support (2) so as to suppress deformation in the compression direction, the movement of the glass fiber in the pressure direction is blocked by the support (2). Further, since the filter medium (3a) is compressed, the frictional force between the glass fibers is strong, and is stronger than the peeling force due to the compressed air at the time of backwashing. Therefore, even during backwashing, the movement of the glass fibers in a direction substantially perpendicular to the compression direction is suppressed by the frictional force. Therefore, the glass fibers do not peel off even during backwashing, and can be used repeatedly by performing backwashing even when the filter element (1) is clogged.
【００１２】なお、この明細書において略直交という用
語は厳密な意味で使用しているのではない。例えば濾液
は濾材（３ａ）の圧縮方向に対し略直交するように流れ
る、とは、濾材（３ａ）の圧縮方向の端面から被処理液
が流入したり、逆洗の際の圧縮空気が流出することがな
いといった程度の意味である。In this specification, the term "substantially orthogonal" is not used in a strict sense. For example, the phrase "the filtrate flows so as to be substantially orthogonal to the compression direction of the filter medium (3a)" means that the liquid to be treated flows in from the end face in the compression direction of the filter medium (3a), or the compressed air flows out during backwashing. It means that there is nothing.
【００１３】次に、この発明に関する試験例を示すこと
により、この発明の効果を明らかにする。なお、試験に
際しては、試験機として実施例１、対照例１、対照例
２、対照例３を用い、毛管浸透速度での濾過における濾
過量と濾液内の夾雑物量を測定した。なお、濃度測定方
法はＪＩＳ−Ｋ２２７６航空燃料油試験方法 微粒夾雑
物試験方法（試験室濾過法）により、汚濁液濃度は０．
８〜５００μｍの粒子を３０ｍｇ／リットルに設定して
行った。Next, the effects of the present invention will be clarified by showing test examples relating to the present invention. In addition, at the time of the test, using Example 1, Control Example 1, Control Example 2, and Control Example 3 as test machines, the amount of filtration and the amount of impurities in the filtrate in the filtration at the capillary penetration rate were measured. The concentration was measured by the JIS-K2276 aviation fuel oil test method and the fine particle contamination test method (test room filtration method).
The measurement was performed by setting the particle size of 8-500 μm to 30 mg / liter.
【００１４】この試験に使用する実施例はこの発明に係
るフィルタエレメントであり、具体的には下記のフィル
タエレメントを使用した。まず、直径４ｍｍの孔が１平
方メートル当たり４５００個穿孔されたステンレス板を
丸めて直径２０ｍｍ、長さ４４０ｍｍのパイプ状にして
これを支持管（２ａ）とした。この支持管（２ａ）の一
端に直径５５ｍｍのステンレス製の円盤を固着してこれ
を底部挟持板（２ｂ）とし、他端には外部に雄螺子が設
けられた管状体が連通するように固着されている。前記
支持管（２ａ）には中心に２２ｍｍの孔が穿孔された直
径５５ｍｍのステンレス円盤が遊嵌可能であるようにさ
れ、このステンレス円盤を上部挟持板（２ｃ）とした。
そして前記雄螺子にナット（２ｄ）を螺合させることに
より上部挟持板（２ｃ）が支持管（２ａ）から外れなく
することができるようにされている。この実施例に使用
するグラスウールは市販されている通常のものであり、
板状のグラスウールから厚さ３０ｍｍ、外径５５ｍｍ、
内径２０ｍｍのドーナツ状のブロックを打ち抜いて使用
した。このグラスウールのブロックを数十個重ね合わせ
て、およそ４００ｍｍになるまで圧縮してこれを濾材
（３ａ）とした。これを上記支持管（２ａ）に嵌め込ん
で、その上から上部挟持板（２ｃ）を嵌め込み、ナット
（２ｄ）を螺合させることにより試験機のフィルタエレ
メント（１）とした。The embodiment used in this test is a filter element according to the present invention. Specifically, the following filter element was used. First, a stainless steel plate in which 4,500 holes having a diameter of 4 mm were perforated per square meter was rounded to form a pipe having a diameter of 20 mm and a length of 440 mm, which was used as a support tube (2a). A 55 mm diameter stainless steel disk is fixed to one end of the support tube (2a), which is used as a bottom holding plate (2b). The other end of the support tube (2a) is connected so as to communicate with a tubular body provided with a male screw on the outside. Have been. A 55 mm diameter stainless steel disc having a 22 mm hole formed in the center thereof was made to be freely fittable in the support tube (2a), and this stainless steel disc was used as an upper holding plate (2c).
By screwing a nut (2d) onto the male screw, the upper holding plate (2c) can be prevented from coming off the support tube (2a). The glass wool used in this example is a commercially available normal one,
30mm thick, 55mm outside diameter from plate-shaped glass wool,
A donut-shaped block having an inner diameter of 20 mm was punched out and used. Dozens of these glass wool blocks were superimposed and compressed to about 400 mm to obtain a filter medium (3a). This was fitted into the support tube (2a), the upper clamping plate (2c) was fitted from above, and a nut (2d) was screwed into the filter tube to obtain a filter element (1) of a testing machine.
【００１５】なお、対照例１としては市販されているグ
ラスウール板を圧縮して布状とし、これを支持管（２
ａ）に巻き付けた以外は実施例と同一のフィルタエレメ
ントを使用した。対照例２としてはグラスウールのブロ
ックを圧縮しなかったこと以外は実施例と同一であるフ
ィルタエレメントを使用した。対照例３としては濾材の
側面でなく、底面から濾液を導入するようにした（図１
１参照）以外は実施例と同一であるフィルタエレメント
を使用した。As Comparative Example 1, a commercially available glass wool plate was compressed into a cloth shape, which was then placed in a support tube (2).
The same filter element as in the example was used except that it was wound in a). Control 2 used the same filter element as in the example except that the glass wool block was not compressed. In Comparative Example 3, the filtrate was introduced not from the side of the filter medium but from the bottom (FIG. 1).
Except for 1), the same filter element as in the example was used.
【００１６】試験の結果を以下に示す。The test results are shown below.
【表１】上記の表にも示される通り、実施例のフィルタ
エレメント（１）を使用した場合には９３％以上の夾雑
物が除去され、汚濁液は好適に清浄化されるのに対し、
対照例１及び２のフィルタエレメントでは夾雑物をほと
んど除去できなかった。また、対照例３のフィルタエレ
メントでは約５０％の夾雑物を除去でき、対照例１及び
２のフィルタエレメントよりは優れていたが、実施例の
フィルタエレメントには劣っている。As shown in the above table, when the filter element (1) of the embodiment is used, 93% or more of the contaminants are removed, and the contaminated liquid is appropriately cleaned.
The filter elements of Control Examples 1 and 2 could hardly remove impurities. The filter element of Comparative Example 3 was able to remove about 50% of contaminants, and was superior to the filter elements of Comparative Examples 1 and 2, but inferior to the filter element of Example.
【００１７】次に、この発明のフィルタエレメント
（１）について、目詰まりを起こす毎に逆洗し、繰り返
し使用した場合の圧力損失に関する試験例を示す。この
試験には上記濾液内の夾雑物量に関する試験で使用した
実施例を用い、粘度が７．８Ｃｓｔ／４０℃、密度が
０．８６ｇ／ｃｍ２ ／１５℃、夾雑物の濃度が３０ｍ
ｇ／リットル、夾雑物の粒度が１μｍ〜１００μｍであ
る汚濁液を０．７リットル／ｍｉｎの速度で濾過し、１
２時間おきに逆洗した場合の圧力損失を測定した。Next, a test example of the pressure loss when the filter element (1) of the present invention is backwashed every time clogging occurs and is used repeatedly will be described. Using Example used in testing for contamination amount in the filtrate in the test, viscosity 7.8Cst / 40 ℃, density 0.86g / cm 2/15 ℃, the concentration of the contaminants 30m
g / liter, a contaminant having a particle size of 1 μm to 100 μm is filtered at a rate of 0.7 liter / min.
The pressure loss when backwashing was performed every two hours was measured.
【００１８】試験の結果を図８、図９、図１０に示す。
もし、フィルタエレメント（１）内部に夾雑物が入り込
んでいるとすると、入り込んだ夾雑物により処理液が通
過しにくくなり、圧力損失が増加するはずであるが、こ
の発明のフィルタエレメント（１）においては図８、図
９、図１０に示される通り４５０回逆洗した後、即ち２
２５日間連続運転した後でも圧力損失はほとんど変化し
ていない。これはフィルタエレメント（１）内部の目詰
まりをほとんど起こしていないことを示す。The results of the test are shown in FIGS. 8, 9 and 10.
If foreign matter enters the interior of the filter element (1), the processing liquid is difficult to pass through due to the entered foreign matter, and pressure loss should increase. However, in the filter element (1) of the present invention, After backwashing 450 times as shown in FIG. 8, FIG. 9 and FIG.
The pressure loss hardly changes even after continuous operation for 25 days. This indicates that clogging inside the filter element (1) has hardly occurred.
【００１９】[0019]
【発明の効果】この発明は、少なくとも支持体及び濾過
材層を有し、毛管浸透速度にて濾過を行うフィルタエレ
メントであり、このフィルタエレメントは圧延工程、ホ
ーミング、工作機で潤滑油として用いる純鉱物油の濾過
に用いるものであり、濾過材層は濾面及び滲出面を有
し、濾面は被処理液と接するようにされ、滲出面側に濾
液室が配置され、すなわち被処理液が濾面から濾過材層
を通り滲出面から滲出されて濾液室に導入されるように
構成され、濾過材層を構成する濾材として、ＪＩＳＫ−
２２７６規定の試験方法で９３％以上の夾雑物除去率を
有する様に予め積層方向に圧縮されたグラスウール又は
不織布の積層体を用いた、フィルタエレメントであっ
て、濾材は圧縮方向への変形が抑えられる様に支持体に
より支持され、且つ濾面及び滲出面は濾材の圧縮方向と
略平行にされ、すなわち濾面から滲出面へ流れる被処理
液の流入方向は濾過材の圧縮方向と略直交するようにさ
れており、前記濾材を構成するグラスウール又は不織布
は、繊維間の摩擦力が逆洗時の圧縮空気による剥離力よ
りも強力となるように圧縮されていることを特徴とする
フィルタエレメントであって、更にこのフィルタエレメ
ントは支持体及び濾過材層からなり、毛管浸透速度にて
濾過を行うフィルタエレメントであって、このフィルタ
エレメントは圧延工程、ホーミング、工作機で潤滑油と
して用いる純鉱物油の濾過に用いるものであり、支持体
は支持管、底部挟持板、上部挟持板、ナットからなり、
支持管の一端側には底部挟持板が固着され且つ他端側は
ナットと螺合可能であるようにされ、支持管はその外周
から管内に向かって液体が流入可能であるようにされ、
上部挟持板は支持管に遊嵌可能であるようにされ、濾材
として、ＪＩＳＫ−２２７６規定の試験方法で９３％以
上の夾雑物除去率を有する様に予め積層方向に圧縮され
たグラスウール又は不織布の積層体を用いて、この濾材
には中央部に滲出孔が設けられ、前記滲出孔には前記支
持管が挿通され、この濾材は上部挟持板と底部挟持板の
間に挟持され、ナットにより前記上部挟持板と底部挟持
板の間が広がらない様に挟持状態が保持され、前記滲出
孔は濾材の圧縮方向と略平行に穿孔されており、前記濾
材を構成するグラスウール又は不織布は繊維間の摩擦力
が逆洗時の圧縮空気による剥離力よりも強力となるよう
に圧縮されていることを特徴とするフィルタエレメント
であるので、以下のような優れた効果を奏する。According to the present invention, there is provided a filter element having at least a support and a filter material layer and performing filtration at a capillary permeation speed. This filter element is used as a lubricating oil in a rolling process, homing, and a machine tool. It is used for filtering mineral oil, the filter medium layer has a filtering surface and a leaching surface, the filtering surface is brought into contact with the liquid to be treated, and a filtrate chamber is arranged on the leaching surface side, that is, the liquid to be treated is is adapted to be introduced into the filtrate chamber is exuding filtering material layer from the street exudation surface from濾面, as filter media constituting the filtering material layer, JISK-
The removal rate of contaminants of 93% or more by the test method specified in 2276
A filter element using a laminate of glass wool or nonwoven fabric that has been compressed in the laminating direction in advance so that the filter medium is supported by a support so that deformation in the compressing direction is suppressed, and a filter surface and a leaching surface are provided. Is substantially parallel to the compression direction of the filter medium, that is, the inflow direction of the liquid to be treated flowing from the filter surface to the leaching surface is set to be substantially perpendicular to the compression direction of the filter medium, and the glass wool or nonwoven fabric constituting the filter medium is A filter element characterized in that the frictional force between the fibers is compressed so as to be stronger than the peeling force due to the compressed air at the time of back washing, and the filter element further comprises a support and a filter medium layer. A filter element for filtering at a capillary permeation rate. This filter element is a pure mineral oil used as a lubricating oil in rolling processes, homing, and machine tools. Is intended to be used for filtering, makes the support the support tube, the bottom clamping plate, the upper clamping plate, a nut,
A bottom holding plate is fixed to one end of the support tube and the other end is configured to be screwable with a nut, and the support tube is configured to allow liquid to flow from the outer periphery thereof into the tube,
The upper holding plate is made to be able to be loosely fitted to the support tube, and as a filter medium , 93% or less according to the test method specified in JIS K-2276.
Using a laminated body of glass wool or nonwoven fabric which has been compressed in the laminating direction in advance so as to have the above-mentioned contaminant removal rate, a bleeding hole is provided in the center of the filter medium, and the support tube is inserted through the bleeding hole. The filter medium is clamped between an upper clamping plate and a bottom clamping plate, and a nut is maintained in a clamping state so as not to spread between the upper clamping plate and the bottom clamping plate. Is, since the glass wool or non-woven fabric constituting the filter medium is a filter element characterized by being compressed so that the frictional force between the fibers is stronger than the peeling force due to the compressed air at the time of backwashing, It has the following excellent effects.
【００２０】すなわち、濾材は支持体により圧縮方向へ
の変形が抑えられる様に支持されているので、ガラス繊
維の圧力方向への移動は支持体により遮られ、且つ濾材
はＪＩＳＫ−２２７６規定の試験方法で９３％以上の夾
雑物除去率を有する様に予め積層方向に圧縮されている
ためこのガラス繊維間の摩擦力は強く、逆洗時の圧縮空
気による剥離力よりも強力になっており、逆洗時であっ
ても圧縮方向と略直交する方向へのガラス繊維の移動は
抑えられるため、逆洗時であってもガラス繊維は剥離せ
ず、さらに、処理液の速度が毛管浸透速度を越えてしま
った場合でも、濾材内に夾雑物が入り込みにくく、フィ
ルタエレメントが目詰まりを起こした場合でも逆洗を行
うことにより繰り返し使用することができるという効果
を奏する。That is, since the filter medium is supported by the support so that deformation in the compression direction is suppressed, the movement of the glass fiber in the pressure direction is blocked by the support, and the filter medium is tested according to JIS K-2276. 93% or more contamination by the method
Since the glass fibers are compressed in the laminating direction in advance so as to have a foreign matter removal rate, the frictional force between the glass fibers is strong, and is stronger than the peeling force due to the compressed air at the time of backwashing. Since the movement of the glass fiber in the direction substantially perpendicular to the compression direction is also suppressed, the glass fiber does not peel even during back washing, and even when the processing liquid speed exceeds the capillary penetration speed. In addition, there is an effect that impurities can hardly enter into the filter medium, and even if the filter element is clogged, the filter element can be repeatedly used by performing the backwashing.
【図１】本発明に係るフィルタエレメントの外観斜視図
である。FIG. 1 is an external perspective view of a filter element according to the present invention.
【図２】本発明に係るフィルタエレメントの支持体の外
観斜視図である。FIG. 2 is an external perspective view of a support of the filter element according to the present invention.
【図３】本発明に使用可能な濾材の積層構造を示す模式
図である。FIG. 3 is a schematic view showing a laminated structure of a filter medium usable in the present invention.
【図４】濾材の圧縮方向と被処理液の流入方向の関係を
示す模式図である。FIG. 4 is a schematic diagram showing a relationship between a compression direction of a filter medium and an inflow direction of a liquid to be treated.
【図５】濾材の圧縮方向と垂直な面の形状を示す模式図
である。FIG. 5 is a schematic view showing a shape of a surface of the filter medium perpendicular to a compression direction.
【図６】濾材の圧縮方向と平行な面の形状を示す模式図
である。FIG. 6 is a schematic diagram showing a shape of a surface parallel to a compression direction of a filter medium.
【図７】従来のフィルタエレメント及びその製造方法を
示す模式図である。FIG. 7 is a schematic view showing a conventional filter element and a method for manufacturing the same.
【図８】圧力損失に関する試験例の試験結果を示す表で
ある。FIG. 8 is a table showing test results of test examples relating to pressure loss.
【図９】圧力損失に関する試験例の試験結果を示す表で
ある。FIG. 9 is a table showing test results of test examples relating to pressure loss.
【図１０】圧力損失に関する試験例の試験結果を示す表
である。FIG. 10 is a table showing test results of test examples relating to pressure loss.
【図１１】実施例における対照例３を表す模式図であ
る。FIG. 11 is a schematic view illustrating a comparative example 3 in the example.
１・・・・フィルタエレメント ２・・・・支持体 ２ａ・・・支持管 ２ｂ・・・底部挟持板 ２ｃ・・・上部挟持板 ２ｄ・・・ナット ３・・・・濾過材層 ３ａ・・・濾材 ３ｂ・・・濾面 ３ｃ・・・滲出面 ４・・・・濾液室 ５・・・・濾過材の圧縮方向 ６・・・・被処理液の流入方向 DESCRIPTION OF SYMBOLS 1 ... Filter element 2 ... Support 2a ... Support tube 2b ... Bottom holding plate 2c ... Top holding plate 2d ... Nut 3 ... Filter material layer 3a ... · Filter medium 3b · · · Filter surface 3c · · · Leaching surface 4 · · · Filtrate chamber 5 · · · Compression direction of the filter medium 6 · · · Inflow direction of the liquid to be treated
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｂ０１Ｄ 29/10 ５３０Ｂ (58)調査した分野(Int.Cl.7，ＤＢ名) B01D 29/00 B01D 35/02 B01D 39/00 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 identification code FI B01D 29/10 530B (58) Investigated field (Int.Cl. 7 , DB name) B01D 29/00 B01D 35/02 B01D 39 / 00
Claims (2)
管浸透速度にて濾過を行うフィルタエレメントであり、
このフィルタエレメントは圧延工程、ホーミング、工作
機で潤滑油として用いる純鉱物油の濾過に用いるもので
あり、濾過材層は濾面及び滲出面を有し、濾面は被処理
液と接するようにされ、滲出面側に濾液室が配置され、
すなわち被処理液が濾面から濾過材層を通り滲出面から
滲出されて濾液室に導入されるように構成され、濾過材
層を構成する濾材として、ＪＩＳＫ−２２７６規定の試
験方法で９３％以上の夾雑物除去率を有する様に予め積
層方向に圧縮されたグラスウール又は不織布の積層体を
用いた、フィルタエレメントであって、濾材は圧縮方向
への変形が抑えられる様に支持体により支持され、且つ
濾面及び滲出面は濾材の圧縮方向と略平行にされ、すな
わち濾面から滲出面へ流れる被処理液の流入方向は濾過
材の圧縮方向と略直交するようにされており、前記濾材
を構成するグラスウール又は不織布は、繊維間の摩擦力
が逆洗時の圧縮空気による剥離力よりも強力となるよう
に圧縮されていることを特徴とするフィルタエレメン
ト。1. A filter element having at least a support and a filter material layer, and performing filtration at a capillary permeation rate,
This filter element is used for rolling process, homing, and filtering of pure mineral oil used as lubricating oil in a machine tool.The filter material layer has a filter surface and a leaching surface, and the filter surface is in contact with the liquid to be treated. The filtrate chamber is arranged on the leaching side,
That is, the liquid to be treated is configured to be leached from the filter surface through the filter material layer and leached from the leaching surface and introduced into the filtrate chamber. As a filter material constituting the filter material layer, a test material specified in JISK-2276 is used.
A glass wool or nonwoven fabric laminate that has been compressed in the lamination direction in advance to have a contaminant removal rate of 93% or more
The filter element used , wherein the filter medium is supported by a support so that deformation in the compression direction is suppressed, and the filter surface and the oozing surface are made substantially parallel to the compression direction of the filter medium, that is, the leaching surface from the filter surface. The flow direction of the liquid to be treated flowing into the filter medium is set so as to be substantially orthogonal to the compression direction of the filter medium. A filter element characterized in that it is also compressed to be strong.
度にて濾過を行うフィルタエレメントであって、このフ
ィルタエレメントは圧延工程、ホーミング、工作機で潤
滑油として用いる純鉱物油の濾過に用いるものであり、
支持体は支持管、底部挟持板、上部挟持板、ナットから
なり、支持管の一端側には底部挟持板が固着され且つ他
端側はナットと螺合可能であるようにされ、支持管はそ
の外周から管内に向かって液体が流入可能であるように
され、上部挟持板は支持管に遊嵌可能であるようにさ
れ、濾材として、ＪＩＳＫ−２２７６規定の試験方法で
９３％以上の夾雑物除去率を有する様に予め積層方向に
圧縮されたグラスウール又は不織布の積層体を用いて、
この濾材には中央部に滲出孔が設けられ、前記滲出孔に
は前記支持管が挿通され、この濾材は上部挟持板と底部
挟持板の間に挟持され、ナットにより前記上部挟持板と
底部挟持板の間が広がらない様に挟持状態が保持され、
前記滲出孔は濾材の圧縮方向と略平行に穿孔されてお
り、前記濾材を構成するグラスウール又は不織布は繊維
間の摩擦力が逆洗時の圧縮空気による剥離力よりも強力
となるように圧縮されていることを特徴とするフィルタ
エレメント。2. A filter element, comprising a support and a filter material layer, for filtering at a capillary permeation rate, wherein the filter element is used in a rolling process, homing, and filtration of pure mineral oil used as a lubricating oil in a machine tool. To use,
The support comprises a support tube, a bottom holding plate, an upper holding plate, and a nut.A bottom holding plate is fixed to one end of the support tube, and the other end can be screwed with the nut. The liquid is allowed to flow into the pipe from the outer periphery thereof, and the upper holding plate is made to be able to be loosely fitted to the support pipe. As a filter medium , a test method specified in JISK-2276 is used.
Using a laminate of glass wool or nonwoven fabric that has been compressed in the lamination direction in advance so as to have a contaminant removal rate of 93% or more ,
The filter medium is provided with a seepage hole at the center thereof, the support tube is inserted into the seepage hole, the filter medium is sandwiched between an upper holding plate and a bottom holding plate, and a nut is provided between the upper holding plate and the bottom holding plate. The holding state is maintained so that it does not spread,
The exudation holes are perforated substantially parallel to the compression direction of the filter medium, and the glass wool or the nonwoven fabric forming the filter medium is compressed so that the frictional force between the fibers becomes stronger than the peeling force due to the compressed air at the time of backwashing. A filter element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31428799A JP3220442B2 (en) | 1999-11-04 | 1999-11-04 | Filter element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31428799A JP3220442B2 (en) | 1999-11-04 | 1999-11-04 | Filter element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001129320A JP2001129320A (en) | 2001-05-15 |
| JP3220442B2 true JP3220442B2 (en) | 2001-10-22 |
Family
ID=18051558
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31428799A Expired - Fee Related JP3220442B2 (en) | 1999-11-04 | 1999-11-04 | Filter element |
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| Country | Link |
|---|---|
| JP (1) | JP3220442B2 (en) |
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|---|---|---|---|---|
| CN107551703A (en) * | 2016-07-01 | 2018-01-09 | 上海振世能源科技有限公司 | Integrated filter core and its application method for dryer |
| CN110038336A (en) * | 2019-05-23 | 2019-07-23 | 上海艾科液压技术有限公司 | A kind of stainless steel filter core and production method in backwashing filtration system of rolling mill |
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1999
- 1999-11-04 JP JP31428799A patent/JP3220442B2/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| JP2001129320A (en) | 2001-05-15 |
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