JP4185565B1 - Normal filter plate with filter cloth - Google Patents
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Abstract
【課題】フィルタープレス装置の普通濾板に濾布をシワ、ツレ、タルミの発生を抑制しながら装着させることができるフィルタープレス用濾布を提供する。
【解決手段】略矩形の枠体と、この枠体の内側に枠体の厚さよりも薄く形成され被濾過対象となる原液を流通可能な第２の原液孔を穿設した濾過面に、原液孔の周りに放射状に配置され、かつ、普通濾板の厚さ方向に突出する隆起部分を備える圧搾式フィルタープレス装置の普通濾板に装着されるフィルタープレス用濾布であって、隆起部分との接触部分には、被覆部２７が設けられ、被覆部２７は、隆起部分の底面と略同一平面形状であり、かつ、その平面形状に外接する矩形を描いた場合にその略対角方向に伸縮することを特徴とするフィルタープレス用濾布による。
【選択図】図１The present invention provides a filter cloth for a filter press that can be attached to a normal filter plate of a filter press apparatus while suppressing generation of wrinkles, slippage, and tarmi.
An undiluted solution is formed in a substantially rectangular frame and a filtration surface formed with a second undiluted solution hole formed inside the frame that is thinner than the thickness of the frame and through which the undiluted solution to be filtered can be circulated. A filter press filter cloth to be attached to a normal filter plate of a squeeze type filter press device, which is provided with a raised portion radially arranged around a hole and protruding in the thickness direction of the normal filter plate, The contact portion 27 is provided with a covering portion 27. The covering portion 27 has substantially the same planar shape as the bottom surface of the raised portion, and in a substantially diagonal direction when a rectangle circumscribing the planar shape is drawn. According to the filter cloth for filter press characterized by expansion and contraction.
[Selection] Figure 1
Description
本発明は、原液を圧搾濾過して原液の脱水を行うための圧搾式フィルタープレスに装着する普通濾板用濾布に関する。 The present invention relates to a filter cloth for a normal filter plate to be attached to a squeeze type filter press for squeezing and filtering the stock solution to dehydrate the stock solution.
従来、対向して配置される２枚の濾布により構成される濾室に原液（スラリー）を流し込んで脱水ケーキを作る単式フィルタープレスの開発により濾過作業の効率化が進んだ。
さらに、上述のような単式フィルタープレスの濾板の有効濾過面の中に、原液供給孔が穿設されたセンターフィード型フィルタープレス（以下「フィルタープレス」と呼ぶ。）が開発され、作業効率が飛躍的に向上した。
このようなフィルタープレスは、濾過面が膨出して濾室を押圧する圧搾濾板と、この圧搾濾板の濾面と対向する位置に配置され、圧搾濾板の濾面と共同して濾室を形成する普通濾板が交互に配設されるものである。
また、その圧搾濾板は、例えば、剛性を有する額縁状の枠体の内側に、これよりも厚みの薄い濾板を備え、この濾板の表面が可撓材に被覆されており、濾板と可撓材の接触部分に液体が供給されることで可撓材が濾室側に膨出するよう構成されている。
そして、圧搾濾板の可撓材が濾室側に膨出することで、濾室に収容される原液が圧搾濾過されて脱水ケーキが形成されるのである。
Conventionally, the efficiency of filtration work has progressed through the development of a single filter press in which a stock solution (slurry) is poured into a filter chamber composed of two filter cloths arranged to face each other to produce a dehydrated cake.
Furthermore, a center feed type filter press (hereinafter referred to as “filter press”) in which a stock solution supply hole is formed in the effective filtration surface of the filter plate of the single filter press as described above has been developed, and the working efficiency is improved. Dramatically improved.
Such a filter press is arranged at a position opposite to the filter surface of the squeeze filter plate, and a filter chamber in which the filter surface bulges and presses the filter chamber, and in combination with the filter surface of the squeeze filter plate. Ordinary filter plates for forming the film are alternately arranged.
Further, the squeezed filter plate includes, for example, a filter plate having a thinner thickness than the rigid frame-like frame body, and the surface of the filter plate is covered with a flexible material. When the liquid is supplied to the contact portion between the flexible material and the flexible material, the flexible material bulges to the filter chamber side.
And when the flexible material of a squeezing filter board swells to the filter chamber side, the undiluted | stock solution accommodated in a filter chamber is squeezed and filtered, and a dehydrated cake is formed.
ところで、このようなフィルタープレスにおいては、圧搾濾板の濾板と可撓材の接触部に液体を供給した際に、可撓材が原液孔付近において異常に膨出して破損が生じたり、次の圧搾作業時に原液孔内における原液の通過が円滑に行われなくなるという不具合が生じていた。
このような課題に対処する目的で、圧搾濾板の原液孔に、可撓材の原液孔側への膨出を防止するような補強リングを設けたところ、今度は、補強リングの端部から可撓材が急激に折曲げされて膨出するという現象が生じてしまい、補強リングの締め付け端縁に位置した部分の可撓材が破損し易くなるという不具合が生じてしまっていた。
By the way, in such a filter press, when the liquid is supplied to the contact portion between the filter plate of the squeeze filter plate and the flexible material, the flexible material abnormally bulges in the vicinity of the stock solution hole and breakage occurs. During the squeezing operation, the stock solution could not be smoothly passed through the stock solution hole.
For the purpose of coping with such a problem, a reinforcing ring that prevents the bulge of the flexible material toward the raw liquid hole side is provided in the raw liquid hole of the squeeze filter plate. The phenomenon that the flexible material is suddenly bent and bulges has occurred, and the flexible material at the portion positioned at the tightening edge of the reinforcing ring is easily damaged.
そこで、このような不具合を防止する目的で、フィルタープレスに更なる改良が加えられ、特許文献１に記載されるようなフィルタープレスが開発された。
具体的には、圧搾濾板に対向して設けられる普通濾板の原液孔周辺の濾面に、原液孔に対して放射状に複数個の隆起部分を形成することで、原液孔近傍における圧搾濾板と普通濾板との距離を狭め、補強リングの端部から可撓材が急激に折曲げされて膨出するのを防止している（特公平４−３１７２５号公報を参照）。
このように、特許文献１に改良されるような改良型のフィルタープレスにおいては、圧搾濾板の補強リング近傍における可撓材の過剰な膨出を抑制することができるものの、普通濾板の表面に隆起部分が形成されているので、その表面を被覆する濾布にシワが生じやすくなるという課題があった。
この場合、濾室に収容される原液を圧搾する度に、普通濾板上に生じるシワの部分に過大な負荷がかかってしまい、濾布のシワがよった部分が破損し易くなったり、濾室にスラリー状の原液が流入する際に勢い良く流入する原液によって濾布のシワになった部分が摺れてしまい、やはり破損が生じやすくなっていた。
このような課題に対処するための発明が開示されている。
Therefore, in order to prevent such problems, further improvements have been added to the filter press, and a filter press as described in Patent Document 1 has been developed.
Specifically, by forming a plurality of raised portions radially with respect to the stock solution hole on the filter surface around the stock solution hole of the ordinary filter plate provided opposite to the press filter plate, the press filtration in the vicinity of the stock solution hole is performed. The distance between the plate and the normal filter plate is narrowed to prevent the flexible material from being suddenly bent and bulged from the end of the reinforcing ring (see Japanese Patent Publication No. 4-31725).
As described above, in the improved filter press as improved in Patent Document 1, excessive swelling of the flexible material in the vicinity of the reinforcing ring of the compressed filter plate can be suppressed, but the surface of the normal filter plate. Since the raised portion is formed on the filter cloth, there is a problem that wrinkles are likely to occur on the filter cloth covering the surface.
In this case, every time the undiluted solution contained in the filter chamber is squeezed, an excessive load is applied to the wrinkled portion that normally occurs on the filter plate, and the wrinkled portion of the filter cloth is easily damaged, When the slurry-like stock solution flowed into the chamber, the wrinkled portion of the filter cloth was slid by the stock solution that flowed in vigorously, and damage was likely to occur.
An invention for dealing with such a problem is disclosed.
特許文献２には「センターフィード型フィルタープレス用濾過布のスラリー供給孔の縫製構造」という名称で、センターフィード型フィルタープレス用濾過布における強化縫製構造に関する発明が開示されている。
より具体的には、特許文献２に開示される発明は、結合布と濾板の表裏両面を覆う二枚一対の濾過布との重合部分に施される結合ミシン縫いが、スラリー供給孔の中心に近い側の前記結合布と、この濾過布との重合部分の端縁（Ｘ）と前記スラリー供給孔の中心から遠い側の前記結合体と前記濾過布との重合部分の端縁（Ｙ）で、端縁（Ｘ）及び又は端縁（Ｙ）の際から２〜５ｍｍの間の部位に２〜３本のミシン縫いを周縁の曲線に略平行に１〜２ｍｍの間隔で配置した後に、前記濾過布と前記結合布の重合部に前記スラリー供給孔の中心から法線方向に７〜１５ｍｍの間隔を置いてジグザグ状のミシン縫いを施したことを特徴とするものである。
上記構成の特許文献２に記載の発明によれば、濾過布と結合布の重合部におけるスラリー供給孔の放射方向に「伸縮余裕」を与え、急激な圧搾膜の膨張に緩衝作用をなして、縫合強力向上の効果を高め、長期間に亘る苛酷な濾過操作に耐え、濾過工程の操業を安定裏に継続させられるという効果を有する。
Patent Document 2 discloses an invention relating to a reinforced sewing structure in a center-feed type filter press filter cloth under the name of “sewing structure of slurry supply hole of filter cloth for center-feed type filter press”.
More specifically, in the invention disclosed in Patent Document 2, the sewing machine stitched on the overlapping portion of the pair of filter cloths covering the front and back surfaces of the filter cloth is the center of the slurry supply hole. And the edge (X) of the overlapping portion of the filter cloth and the bonded portion on the side far from the center of the slurry supply hole (Y) Then, after arranging 2 to 3 sewing stitches at a portion between 2 and 5 mm from the edge (X) and / or the edge (Y) at intervals of 1 to 2 mm substantially parallel to the peripheral curve, A zigzag-like sewing machine is provided at the overlapping portion of the filter cloth and the binding cloth at a distance of 7 to 15 mm in the normal direction from the center of the slurry supply hole.
According to the invention described in Patent Document 2 having the above-described configuration, a “stretching margin” is provided in the radial direction of the slurry supply hole in the overlapping portion of the filter cloth and the binding cloth, and a buffering action is provided for rapid expansion of the squeezed membrane. It has the effect of enhancing the effect of improving the suturing strength, withstanding a severe filtration operation over a long period of time, and allowing the operation of the filtration process to be continued stably.
特許文献３には「フィルタープレス用濾布とその製造方法」という名称で、圧搾式フィルタープレスに使用される濾布とその製造方法に関する発明が開示されている。
より具体的には、特許文献３に開示される発明は、２枚の濾布を筒状の連結用布で縫着して一体構造となすに際し、前記連結用布に、柔軟な構造に織成された布を用い、バイアス裁ちとし、かつ、前記筒状の筒長方向の寸法において、筒周方向の一部または全部の区間で寸法を変化させた形状で成形し、濾板への装着時に、前記隆起部分の形状に相応するよう、該連結用布８の筒長方向の両縁部と、２枚の濾布に空けた原液孔相当部の穴の周囲とを縫合したものである。
上記構成の特許文献３に記載の発明によれば、普通濾板の原液孔周辺に複数個の隆起部分が突出して凹凸形状となっている場合に、濾布の装着時に、濾板の隆起部分周辺に相対する部分で、シワ、ツレ、タルミが発生するのを容易かつ低コストに防止することができる。従って、フィルタープレスの運転時における原液供給不良や、濾布の原液孔相当部付近の局部摩耗、過張力による破損を解消することができるという効果を有する。
Patent Document 3 discloses an invention relating to a filter cloth used in a squeeze-type filter press and a manufacturing method thereof under the name of “filter cloth for filter press and manufacturing method thereof”.
More specifically, in the invention disclosed in Patent Document 3, when two filter cloths are sewn together with a cylindrical connecting cloth to form an integrated structure, the connecting cloth is woven into a flexible structure. Using the formed cloth, bias cutting, and forming the shape in the cylindrical cylinder length direction with the dimensions changed in part or all of the section in the cylinder circumferential direction, and mounting to the filter plate Occasionally, both edges in the tube length direction of the connecting cloth 8 and the periphery of the hole corresponding to the stock solution hole formed in the two filter cloths are sewn so as to correspond to the shape of the raised portion. .
According to the invention described in Patent Document 3 having the above-described configuration, when a plurality of raised portions protrudes around the stock solution hole of the normal filter plate and has an uneven shape, the raised portion of the filter plate is attached when the filter cloth is attached. It is possible to easily and inexpensively prevent the generation of wrinkles, sag, and tarmi in the portion facing the periphery. Accordingly, there is an effect that it is possible to eliminate the supply failure of the stock solution during the operation of the filter press, the local wear near the portion corresponding to the stock solution hole of the filter cloth, and the damage due to the over tension.
しかしながら、特許文献２に記載の発明おいては、濾過布と結合布の重合部全体にわたって「伸縮余裕」が与えられるため、特許文献１に記載されるようなフィルタープレスの普通濾板に特許文献２に記載の濾過布を装着した場合、隆起部分に接触する濾過布には高い引張力が、それ以外の平端部に接触する濾過布にはそれよりも低い引張力が作用することになる。
このため、普通濾板の隆起部分の周辺において、引張力に差が生じる部分にシワ、ツレ、タルミが発生してしまう恐れがあった。
However, in the invention described in Patent Document 2, since a “stretch margin” is provided over the entire overlapping portion of the filter cloth and the binding cloth, the normal filter plate of the filter press as described in Patent Document 1 is disclosed in Patent Document 1. When the filter cloth described in 2 is attached, a high tensile force acts on the filter cloth that contacts the raised portion, and a lower tensile force acts on the filter cloth that contacts the other flat end.
For this reason, there is a risk that wrinkles, sag, and tarmi may occur in the portion where the difference in tensile force occurs around the raised portion of the normal filter plate.
また、特許文献３に記載の発明においては、連結用布の筒長方向の寸法において、筒周方向の一部または全部の区間で寸法を変化させた形状で成形することで、隆起部分の周辺におけるシワ、ツレ、タルミの発生を抑制できる可能性が高いものの、このように一定の筒状をなさず、しかもバイアス断ちされて柔軟性のある布を、それよりも柔軟性の低い布に寸法ズレを生じさせることなく縫合することは極めて難しく、生産性を向上し難いという課題があった。
また、同様の理由から個々の製品の品質にバラツキが生じやすいという課題もあった。
Further, in the invention described in Patent Document 3, the dimensions of the connecting cloth in the cylinder length direction are formed in a shape in which the dimension is changed in a part or all of the section in the cylinder circumferential direction, so that the periphery of the raised portion Although there is a high possibility of suppressing the occurrence of wrinkles, sag, and tarmi, the dimensions of a flexible cloth that does not form a fixed cylinder and is biased in such a way is reduced to a cloth that is less flexible. There is a problem that it is extremely difficult to sew without causing a shift and it is difficult to improve productivity.
In addition, for the same reason, there is a problem that the quality of individual products is likely to vary.
本発明はかかる従来の事情に対処してなされたものであり、その目的はフィルタープレスの普通濾板に濾布を装着した際にシワ、ツレ、タルミの発生を抑制することができる普通濾板用濾布を提供することにある。 The present invention has been made in response to such a conventional situation, and the purpose thereof is a normal filter plate capable of suppressing the generation of wrinkles, sag, and tarmi when a filter cloth is attached to the normal filter plate of a filter press. It is to provide a filter cloth.
上記目的を達成するため請求項１記載の発明である濾布付普通濾板は、圧搾式フィルタープレス装置に用いる濾布付普通濾板であって、この濾布付普通濾板は、普通濾板と、この普通濾板に装着される普通濾板用濾布とを有し、普通濾板は、略矩形の枠体と、この枠体の内側に枠体の厚さよりも薄く形成され,被濾過対象である原液を流通させるための原液孔が穿設される濾板と、この濾板の両面に形成されるそれぞれの濾過面の原液孔の周りに放射状に配置され，かつ, 濾板の厚さ方向に突出する隆起部分と、を備え、普通濾板用濾布は、隆起部分の表面を被覆する被覆部を有し、被覆部は、隆起部分と濾過面との接触面と略同一平面形状であり、かつ、接触面において原液孔に沿う辺の両端を結ぶ第１の直線を形成し、この第１の直線に直交しかつ接触面にそれぞれ接する第２及び第３の直線を形成し、さらに、第１の直線と平行でかつ接触面に接する第４の直線を形成し、第１乃至第４の直線により形成される接触面に外接する矩形を描いた場合にその略対角方向に伸縮性を有し、この伸縮性は、被覆部を接触面と略同一平面形状から，隆起部分の表面と少なくとも同じ大きさにまで，広げられる程度の伸縮性であることを特徴とするものである。
上記構成の発明に係る普通濾板用濾布において、被覆部を隆起部分の底面と略同一平面形状にすることで、被覆部を除く請求項１記載の普通濾板用濾布と、濾過面とを密着させるという作用を有する。
また、被覆部を、その平面形状に外接する矩形を描いた場合にその略対角方向に伸縮するよう構成することで、隆起部分により被覆部を引き伸ばして隆起部分の表面に被覆部を密着させるという作用を有する。
Filter cloth with plain filter plate is a first aspect of the present invention for achieving the above object, a plain filter plate with filter cloth used in the squeeze-type filter press apparatus, the filter cloth with ordinary filtration plate This is usually and the filtration plate, and a plain filter plate for a filter cloth is attached to this common filter plate usually filter plate, a substantially rectangular frame body, thinner than the thickness of the frame on the inside of this frame body is formed, arranged radially around the filter plate to undiluted holes for circulating the filtered target der Ru stock is drilled, each filter surface stock holes that are formed on both surfaces of the filtration plate, and, and a raised portion that protrudes in the thickness direction of the filtration plate, filter cloth for plain filtration plate has a coating portion covering the surface of the raised portion, the coating portion includes a raised portion and filtration surface contact surface and are substantially the same planar shape, and to form a first straight line connecting both ends of the side along the concentrate hole in the contact surface, directly on the first straight line this Form forms the second and third linear in contact with the vital contact surface, further, and parallel to the first straight line to form a fourth line tangent to the contact surface, formed by the first to fourth linear is the has its substantially diagonal direction stretch when painted rectangle circumscribing the contact surface, the elastic is from the contact surface and substantially the same planar shape of the covering portion, at least as large as the surface of the raised portion in which up to, and wherein the Ru stretch der enough to spread the of.
The filter cloth for a normal filter plate according to claim 1, wherein the filter cloth for a normal filter plate according to the invention having the above-described configuration is formed by making the covering portion substantially flush with the bottom surface of the raised portion, thereby removing the covering portion. It has the effect | action of adhering.
In addition, when the covering part is configured to extend and contract in a substantially diagonal direction when a rectangle circumscribing the planar shape is drawn, the covering part is stretched by the protruding part and the covering part is brought into close contact with the surface of the protruding part. It has the action.
請求項２記載の発明である濾布付普通濾板は、請求項１に記載の濾布付普通濾板であって、普通濾板用濾布は、隆起部分と符合する位置に接触面と略同一平面形状を有して形成される第１の切欠きと，原液孔と符合する位置に形成される第２の切欠きと,を設けた２枚の第１の濾布と、これら２枚の第１の濾布の第１の切欠きに縫着され隆起部分の表面を被覆する被覆部と、２枚の第１の濾布の第２の切欠きに沿って縫着され、原液孔の内側面を被覆するとともに、２枚の第１の濾布をつなぎ合わせる第２の濾布とを備えることを特徴とするものである。
上記構成の発明は、請求項１記載の発明と同じ作用に加え、２枚の第１の濾布のそれぞれは、普通濾板の第２の濾過面を被覆するという作用を有する。このとき、第１の濾布に第１の切欠きを形成することで、第１の濾布が隆起部分により押し上げられるのを妨げて、濾過面と第１の濾布とを隙間なく面接触させるという作用を有する。
また、第２の切欠きを原液孔と符号する位置に設けることで、普通濾板の一方の濾過面側から他方の濾過面側への原液の流動を可能にするという作用を有する。
さらに、第２の濾布は、原液孔の内側面を隙間なく被覆すると同時に２枚の第１の濾布をつなぎ合わせるという作用を有する。
Filter cloth with plain filter plate is a second aspect of the present invention, there is provided a filter cloth with ordinary filtration plate according to claim 1, ordinary filtration plate for filter cloth has a contact surface in a position consistent with the raised portion Two first filter cloths provided with a first notch formed with substantially the same planar shape and a second notch formed at a position coinciding with the stock solution hole, these 2 Like the first first being sewn to notch you coat the surface of the raised portion covering portions of the filter cloth, two of the first filter cloth along the second notch is stitched, It comprises a second filter cloth that covers the inner surface of the stock solution hole and joins two first filter cloths together.
In addition to the same operation as that of the first aspect of the present invention, each of the two first filter cloths has an operation of covering the second filter surface of the normal filter plate. At this time, by forming the first notch in the first filter cloth, the first filter cloth is prevented from being pushed up by the raised portion, and the filter surface and the first filter cloth are in surface contact with no gap. Has the effect of causing
Further, by providing the second notch at a position that is referred to as a stock solution hole, there is an effect that the stock solution can flow from one filtration surface side of the normal filter plate to the other filtration surface side.
Further, the second filter cloth has an action of covering the inner surface of the stock solution hole without gap and simultaneously joining the two first filter cloths.
請求項３記載の発明である濾布付普通濾板は、請求項２に記載の濾布付普通濾板であって、第１の濾布と第２の濾布との重なり部分は、原液孔の内側面上に配置されることを特徴とするものである。
上記構成の発明は、請求項２に記載の発明と同じ作用に加え、第１の濾布と第２の濾布との重なり部分を原液孔の内側面上に配置することで、特に、原液孔周辺部において、第１の濾布を濾過面に隙間なく密着させるという作用を有する。
Filter cloth with plain filter plate is a third aspect of the present invention, there is provided a filter cloth with ordinary filtration plate according to claim 2, overlap between the first filter cloth and the second filter cloth, the stock solution It is arrange | positioned on the inner surface of a hole, It is characterized by the above-mentioned.
In addition to the same operation as that of the invention described in claim 2, the invention having the above-described configuration is particularly advantageous in that the overlapping portion of the first filter cloth and the second filter cloth is disposed on the inner surface of the stock solution hole. In the periphery of the hole, the first filter cloth is brought into close contact with the filtration surface without any gap.
請求項４記載の発明である濾布付普通濾板は、請求項２又は請求項３に記載の濾布付普通濾板であって、第２の濾布は、原液孔の周方向に難伸縮性を有することを特徴とするものである。
上記構成の発明は、請求項２又は請求項３記載のそれぞれの発明と同じ作用に加えて、第２の濾布を原液孔の周方向に伸縮し難くすることで、第１の濾布に第２の濾布を接合する際に、第２の濾布が伸びて接合部近傍にシワ、ツレ、タルミが生じるのを抑制するという作用を有する。
Filter cloth with plain filter plate is a fourth aspect of the invention, there is provided a filter cloth with ordinary filtration plate according to claim 2 or claim 3, the second filter cloth, the flame in the circumferential direction of the stock solution hole It is characterized by having elasticity.
In addition to the same actions as the inventions of claim 2 or claim 3, the invention of the above configuration is made to the first filter cloth by making the second filter cloth difficult to expand and contract in the circumferential direction of the stock solution hole. When the second filter cloth is joined, the second filter cloth has an effect of suppressing the generation of wrinkles, sag, and tarmi in the vicinity of the joined portion by stretching.
請求項５記載の発明である濾布付普通濾板は、請求項２乃至請求項４のいずれか１項に記載の濾布付普通濾板であって、第２の濾布は、筒状を成し、その開口端に耳部が形成されることを特徴とするものである。
上記構成の発明は、請求項２乃至請求項４のそれぞれに記載される発明と同じ作用に加え、第２の濾布を筒状にして第１の濾布の第２の切欠きに沿って接合することで、請求項５記載の普通濾板用濾布の原液孔近傍の濾布の形状を、普通濾板の原液孔近傍の立体形状に近似させるという作用を有する。
また、第２の濾布において原液孔の開口に配置される部分に、すなわち、第２の濾布を筒状に形成した際の開口端に耳部を形成することで、この開口端における濾布の強度を向上させるという作用を有する。
An invention of claim 5, wherein ordinary filtration plate with filter cloth is a cloth with ordinary filtration plate according to any one of claims 2 to 4, the second filter cloth is cylindrical And an ear portion is formed at the open end.
In addition to the same operation as the invention described in each of claims 2 to 4, the invention having the above-described configuration has a second filter cloth in a cylindrical shape along the second notch of the first filter cloth. By joining, the shape of the filter cloth in the vicinity of the stock solution hole of the normal filter plate filter cloth according to claim 5 is approximated to the three-dimensional shape in the vicinity of the stock solution hole of the normal filter plate.
In addition, an ear portion is formed at the portion of the second filter cloth that is disposed at the opening of the stock solution hole, that is, at the opening end when the second filter cloth is formed into a cylindrical shape. It has the effect of improving the strength of the fabric.
本発明の請求項１記載の発明においては、被覆部の形状を隆起部分と濾過面の接触面と略同一平面形状とすることで、隆起部分の外縁近傍の濾布にシワ、ツレ、タルミが生じるのを防止することができる。
また、被覆部を、接触面の平面形状に外接する矩形を描いた場合にその略対角方向に伸縮するように構成することで、隆起部分に被覆部が接触した際に、被覆部を、濾過面において隆起部分が広がる方向に引き伸ばすことができるという効果を有する。
この結果、隆起部分の表面に被覆部を略完全にフットした状態で密着させることができ、その周囲の濾布にシワ、ツレ、タルミが生じるのを防止することができるという効果を有する。
つまり、請求項１記載の発明によれば、普通濾板の隆起部分と符合する位置に被覆部を設け、この部分にのみ伸縮性を付与することで、普通濾板の表面をその立体形状に沿って濾布で被覆することができる。
この結果、圧搾時に請求項１記載の普通濾板用濾布にシワ、ツレ、タルミが生じるのを防止することができるという効果を有する。
従って、圧搾を繰り返した場合に普通濾板用濾布の局所に過大な負荷がかかって破損が生じるのを防止することができるので、濾布の耐久性を向上することができる。
In the invention according to claim 1 of the present invention, the shape of the covering portion is substantially the same planar shape as the contact surface of the raised portion and the filtration surface , so that wrinkles, slips and tarmi are formed on the filter cloth near the outer edge of the raised portion. It can be prevented from occurring.
Further, when the covering portion is configured to expand and contract in a substantially diagonal direction when a rectangle circumscribing the planar shape of the contact surface is drawn, when the covering portion contacts the raised portion, the covering portion is It has an effect that it can be stretched in the direction in which the raised portion is expanded on the filtration surface.
As a result, the covering portion can be brought into close contact with the surface of the raised portion in a substantially completely footed state, and it is possible to prevent wrinkles, slipping, and sagging from occurring on the surrounding filter cloth.
In other words, according to the first aspect of the present invention, the covering portion is provided at a position coinciding with the raised portion of the normal filter plate, and the elastic surface is imparted only to this portion, so that the surface of the normal filter plate has a three-dimensional shape. Along the filter cloth.
As a result, it has the effect that it can prevent that a wrinkle, slipperiness, and a sagging occur in the filter cloth for normal filter boards of Claim 1 at the time of pressing.
Therefore, when the squeezing is repeated, it is possible to prevent an excessive load from being applied locally to the filter cloth for the normal filter plate , thereby preventing breakage, so that the durability of the filter cloth can be improved.
請求項２に記載の発明は、請求項１記載の発明と同じ効果に加え、普通濾板用濾布を２枚の第１の濾布と、隆起部分の数と同数の被覆部と、１枚の第２の濾布により構成することで、普通濾板における濾過面のそれぞれは第１の濾布で、隆起部分の表面は被覆部で、原液孔の内側面は第２の濾布により、それぞれ被覆することができる。
つまり、普通濾板において、境界線で区切られた個々の平面又は曲面のそれぞれに対して、それらの形状と略符合する形状となる濾布を配置し、これらを繋ぎ合わせて普通濾板用濾布を形成することで、普通濾板の立体形状により適合した形状を有する普通濾板用濾布を提供することができるという効果を有する。
この結果、請求項２記載の普通濾板用濾布の普通濾板への装着性を向上することができる。
The invention described in claim 2 has the same effect as that of the invention described in claim 1, and the filter cloth for a normal filter plate includes two first filter cloths, the same number of covering portions as the number of raised portions, and 1 Each of the filter surfaces of the normal filter plate is the first filter cloth, the surface of the raised portion is the covering portion, and the inner surface of the stock solution hole is the second filter cloth. , Each can be coated.
In other words, in a normal filter plate, a filter cloth having a shape that approximately matches the shape of each plane or curved surface separated by a boundary line is arranged, and these are joined together to filter the filter for a normal filter plate. By forming the cloth, there is an effect that a filter cloth for a normal filter plate having a shape more suitable for the three-dimensional shape of the normal filter plate can be provided.
As a result, it is possible to improve the mountability of the filter cloth for a normal filter plate according to claim 2 to the normal filter plate.
請求項３に記載の発明は、請求項１又は請求項２に記載の発明と同じ効果に加え、第１の濾布と第２の濾布との重なり部分を、原液孔の内側面上に配置することで、特に原液孔の周辺において普通濾板の第２の濾過面状に第２の濾布を隙間なく密着させることができるという効果を有する。
よって、原液孔の周辺にシワ、ツレ、タルミが生じるのを抑制することができるという効果を有する。
In addition to the same effect as that of the invention described in claim 1 or 2, the invention described in claim 3 provides an overlapping portion between the first filter cloth and the second filter cloth on the inner surface of the stock solution hole. By disposing, the second filter cloth can be brought into close contact with the second filter surface of the normal filter plate without gaps, particularly in the vicinity of the stock solution holes.
Therefore, there is an effect that it is possible to suppress the generation of wrinkles, sag and tarmi around the stock solution hole.
請求項４に記載の発明は、請求項１乃至請求項３記載のそれぞれの発明と同じ効果に加えて、第１の濾布の第２の切欠きに沿って第２の濾布を接合する際に、第２の濾布の伸長を抑制してその接合部にシワ、ツレ、タルミが生じるのを防止すると同時に、２枚の第１の濾布の相対位置にねじれを生じさせることなく連結させることができるという効果を有する。
すなわち、請求項４に記載の発明によれば、普通濾板における第２の濾過面、隆起部分の上面、原液孔の内側面のそれぞれに、請求項４記載の普通濾板用濾布を構成する第１の濾布、被覆部、第２の濾布を位置ズレを生じさせることなく装着することができるという効果を有する。
この結果、請求項４記載の普通濾板用濾布を普通濾板に装着した際にシワ、ツレ、タルミが生じるのを一層抑制することができるという効果を有する。
The invention according to claim 4 joins the second filter cloth along the second notch of the first filter cloth in addition to the same effects as the respective inventions according to claims 1 to 3. In this case, the expansion of the second filter cloth is suppressed to prevent generation of wrinkles, sag, and tarmi at the joint, and at the same time, the relative positions of the two first filter cloths are connected without causing twisting. It has the effect that it can be made.
That is, according to the invention described in claim 4, the filter cloth for the normal filter plate according to claim 4 is configured on each of the second filter surface, the upper surface of the raised portion, and the inner surface of the stock solution hole in the normal filter plate. Thus, the first filter cloth, the covering portion, and the second filter cloth can be mounted without causing positional displacement.
As a result, when the filter cloth for a normal filter plate according to claim 4 is attached to the normal filter plate, it is possible to further suppress the generation of wrinkles, sag and tarmi.
請求項５に記載の発明は、請求項１乃至請求項４記載のそれぞれの発明と同じ効果に加えて、第２の濾布を原液孔と略同形の円筒状に形成することで、普通濾板への請求項３記載の濾布の形状適合性を一層高めることができるという効果を有する。
また、第２の濾布を円筒状に形成した際の開口両端部に、耳部を形成することで、普通濾板に請求項３記載の濾布を装着した状態で原液孔にスラリー状の原液の送給を繰り返した場合に、この部分がほつれて濾布に破損が生じるのを防止することができるという効果を有する。
According to the fifth aspect of the invention, in addition to the same effects as those of the first to fourth aspects of the invention, the second filter cloth is formed in a cylindrical shape substantially the same shape as the stock solution hole, so that the normal filter is formed. It has the effect that the shape adaptability of the filter cloth of Claim 3 to a board can be improved further.
In addition, by forming ears at both ends of the opening when the second filter cloth is formed into a cylindrical shape, a slurry-like shape is formed in the stock solution hole with the filter cloth according to claim 3 attached to a normal filter plate. When the supply of the stock solution is repeated, it is possible to prevent this portion from fraying and causing damage to the filter cloth.
以下に、本発明の最良の実施の形態に係る普通濾板用濾布の実施例について説明する。 Examples of the filter cloth for ordinary filter plates according to the best mode of the present invention will be described below.
本発明の実施例に係る普通濾板用濾布は、センターフィード型のフィルタープレス装置の普通濾板の表面に装着する普通濾板用濾布であり、普通濾板に形成される濾過面、隆起部分表面、原液孔内側面のそれぞれに符合する形状の濾布を互いに接合してなるものである。
はじめに、本実施例に係る普通濾板用濾布を装着させる普通濾板について図１を参照しながら詳細に説明する。
図１（ａ）はフィルタープレス装置に係る普通濾板の平面図であり、（ｂ）はそのＡ−Ａ線矢視断面図である。
実施例１に係る普通濾板用濾布を装着する普通濾板７は、図１（ａ）に示すように、矩形状の枠体８の内側に、枠体８の厚みよりも薄い濾板９が設けられ、その略中央部にスラリー状の原液を、濾板９の一方の面から他方の面に向って送給するための原液孔２２を形成したものである。
さらに、原液孔２２の周囲には、表面８ａと同程度の高さまで隆起する隆起部分１０,１０が、原液孔２２の外周２２ａに対して放射状に複数個設けられており、これらの隆起部分１０は、固定具１２により濾板９に固定されている。また、固定具１２の頂部が隆起部分１０の表面から突出しないよう、固定具１２の周囲にはざぐり１１が施されている。
なお、図１（ａ）,（ｂ）には、濾板９の表面である濾過面９ａ,９ｂのそれぞれに２箇所ずつ隆起部分１０を設けた普通濾板７を例に挙げて説明しているが、隆起部分１０は図１に示すものより多くても良い。
そして、本実施例に係る普通濾板用濾布は、図１（ｂ）において、破線で示される位置に装着されるものである。
Normally filter plate for a filter cloth according to the embodiment the present invention is a plain filter plate for a filter cloth attached to the surface of the ordinary filtration plate of center feed type filter press apparatus, a filtration surface formed on plain filter plate, A filter cloth having a shape corresponding to each of the raised portion surface and the inner surface of the stock solution hole is joined to each other.
First, a normal filter plate to which a filter cloth for a normal filter plate according to this embodiment is attached will be described in detail with reference to FIG.
Fig.1 (a) is a top view of the normal filter board concerning a filter press apparatus, (b) is the AA arrow directional cross-sectional view.
The normal filter plate 7 to which the filter cloth for the normal filter plate according to the first embodiment is attached is a filter plate that is thinner than the thickness of the frame 8 inside the rectangular frame 8 as shown in FIG. 9 is formed, and a stock solution hole 22 for feeding a slurry-like stock solution from one surface of the filter plate 9 toward the other surface is formed in a substantially central portion thereof.
Further, a plurality of raised portions 10, 10 that protrude to the same height as the surface 8 a are provided around the stock solution hole 22 in a radial pattern with respect to the outer periphery 22 a of the stock solution hole 22. Is fixed to the filter plate 9 by a fixture 12. A counterbore 11 is provided around the fixture 12 so that the top of the fixture 12 does not protrude from the surface of the raised portion 10.
1 (a) and 1 (b), an example of a normal filter plate 7 in which two raised portions 10 are provided on each of the filtration surfaces 9a and 9b, which are the surfaces of the filter plate 9, will be described. However, there may be more raised portions 10 than shown in FIG.
And the filter cloth for normal filter plates which concerns on a present Example is mounted | worn with the position shown with a broken line in FIG.1 (b).
図２は本発明の実施例に係る普通濾板用濾布の構成を示す概念図である。なお、図１に記載されたものと同一部分については同一符号を付し、その構成についての説明は省略する。
図２に示すように、本実施例に係る普通濾板用濾布１は、７点の個別の布により構成されるものであり、これらを、例えば、縫合して接合することで図１に示すような普通濾板７の表面を被覆する濾布が形成される。
具体的には、図２に示すように、略矩形状の２枚の第１の濾布２ａ,２ｂのそれぞれは、その中央部の普通濾板７に形成される原液孔２２と符合する位置に略円形の切欠き５ａ,５ｂが設けられ、その縁に沿って接合用の重なり部２４が形成され、さらに、普通濾板７に設けられる隆起部分１０と符合する位置には、隆起部分１０の底面の平面形状と略同一な平面形状を有する切欠き４ａ１,４ａ2,４ｂ１,４ｂ2が形成されている。
そして、切欠き４ａ１,４ａ 2,４ｂ１,４ｂ2のそれぞれを被覆しながら接合される第３の濾布３ａ１,３ａ2,３ｂ１,３ｂ2は、いずれも伸縮性を有し、第１の濾布２ａ,２ｂに取設するための重なり部２３が設けられている。
さらに、第３の濾布３ａ１,３ａ2が取設された第１の濾布２ａと、第３の濾布３ｂ１,３ｂ2が取設された第１の濾布２ｂとを連結する第２の濾布６は、ベルト状の濾布が略円筒状に形成されるものであり、その端部６ａ,６ｂには耳部が形成されている。なお、本実施例において耳部とは、濾布を構成する布地の端部が切断面でなく、繊維が端部において折り返されることで布地の端部にホツレが生じない形態となっていることを意味している。
FIG. 2 is a conceptual diagram showing a configuration of a filter cloth for a normal filter plate according to an embodiment of the present invention. In addition, the same code | symbol is attached | subjected about the part same as what was described in FIG. 1, and the description about the structure is abbreviate | omitted.
As shown in FIG. 2, the filter cloth 1 for a normal filter plate according to the present embodiment is composed of seven individual cloths. A filter cloth covering the surface of the normal filter plate 7 as shown is formed.
Specifically, as shown in FIG. 2, each of the two substantially rectangular first filter cloths 2a and 2b coincides with the stock solution hole 22 formed in the normal filter plate 7 at the center thereof. Are provided with a substantially circular notch 5a, 5b, a joining overlap portion 24 is formed along the edge of the notch 5a, 5b, and the raised portion 10 is located at a position coincident with the raised portion 10 provided on the normal filter plate 7. Cutouts 4a 1 , 4a 2 , 4b 1 , 4b 2 having substantially the same planar shape as the planar shape of the bottom surface are formed.
The third filter cloth 3a to be joined while covering the respective notches 4a 1, 4a 2, 4b 1 , 4b 2 1, 3a 2, 3b 1, 3b 2 are both have elasticity, An overlapping portion 23 is provided for installation on the first filter cloths 2a and 2b.
Further, the first filter cloth 2a on which the third filter cloths 3a 1 and 3a 2 are installed is connected to the first filter cloth 2b on which the third filter cloths 3b 1 and 3b 2 are installed. The second filter cloth 6 is a belt-shaped filter cloth formed in a substantially cylindrical shape, and ears are formed at the end portions 6a and 6b. In the present embodiment, the end portion of the fabric constituting the filter cloth is not a cut surface, and the fiber is folded at the end portion so that the end portion of the fabric is not flared. Means.
なお、本実施例に係る普通濾板用濾布１においては、普通濾板７に装着した際に、原液孔２２の内側面２２ｂ上に、切欠き５ａ,５ｂに沿って形成される重なり部２４が配置されるため、切欠き５ａ,５ｂの直径Ｂを原液孔２２の直径Ｃよりも小さくする必要がある。
また、ベルト状で両端に耳部が形成される第２の濾布６は、略筒状に形成されて原液孔２２の内側面２２ｂを被覆するため、第２の濾布６の幅Ｄは原液孔２２の内側面２２ｂの長さＨ（図１を参照。）と同じであることが望ましい。
すなわち、第２の濾布６の幅Ｄは、濾板９の厚みＨと略同じか、あるいは、濾板９の厚みＨに第１の濾布２ａ,２ｂのそれぞれの厚みを加えた大きさにする必要がある。
In the normal filter plate filter cloth 1 according to the present embodiment, when the normal filter plate 7 is mounted, the overlapping portion formed along the notches 5 a and 5 b on the inner surface 22 b of the stock solution hole 22. 24 is arranged, it is necessary to make the diameter B of the notches 5 a and 5 b smaller than the diameter C of the stock solution hole 22.
Further, the second filter cloth 6 having a belt-like shape with ears at both ends is formed in a substantially cylindrical shape and covers the inner surface 22b of the stock solution hole 22, so that the width D of the second filter cloth 6 is It is desirable to be the same as the length H (see FIG. 1) of the inner surface 22b of the stock solution hole 22.
That is, the width D of the second filter cloth 6 is substantially the same as the thickness H of the filter plate 9, or the size obtained by adding the thicknesses of the first filter cloths 2a and 2b to the thickness H of the filter plate 9. It is necessary to.
図３は本発明の実施例に係る普通濾板用濾布の概念図である。なお、図１又は図２に記載されたものと同一部分については同一符号を付し、その構成についての説明は省略する。
図１に示すような本実施例に係る普通濾板用濾布１を構成するそれぞれのパーツを繋ぎ合わせると、図３に示すような形態となる。
すなわち、本実施例に係る普通濾板用濾布１は、第１の濾布２ａ,２ｂに形成される切欠き４ａ１,４ａ2,４ｂ１,４ｂ2（図示せず。）のそれぞれに、第１の濾布２ａ,２ｂの裏面２５側から第３の濾布３ａ１,３ａ2,３ｂ１,３ｂ2が、例えば、縫合するなどにより取設されて普通濾板７における隆起部分１０の表面を被覆するための被覆部２７が形成され、さらに、第１の濾布２ａ,２ｂの図示しない切欠き５ａ,５ｂに沿って形成される重なり部２４のそれぞれと、第３の濾布３ａ１,３ａ2,３ｂ１,３ｂ2に形成されるそれぞれの重なり部２３の一部（重なり部２３の原液孔２２側に配置される部分）を第１の濾布２ａ,２ｂの裏面２５側にそれぞれ折り曲げ、この折り曲げ部分の表面２６側に、第２の濾布６が筒状に形成されながら接合されたものである。
なお、本実施例に係る普通濾板用濾布１においては、普通濾板７の表面と接触する側の面を裏面２５、その反対側の面を表面２６としている。
また、本実施例においては、普通濾板用濾布１を普通濾板７に装着した際に、隆起部分１０の表面を実質的に被覆する部分を被覆部２７と呼び、第１の濾布２ａ,２ｂに取設され被覆部２７を形成する第３の濾布３ａ１,３ａ2,３ｂ１,３ｂ2と区別している。
FIG. 3 is a conceptual diagram of a filter cloth for a normal filter plate according to an embodiment of the present invention. In addition, the same code | symbol is attached | subjected about the same part as what was described in FIG. 1 or FIG. 2, and the description about the structure is abbreviate | omitted.
When each part which comprises the filter cloth 1 for normal filter plates which concerns on a present Example as shown in FIG. 1 is joined, it will become a form as shown in FIG.
That is, the filter cloth 1 for ordinary filter plates according to this embodiment is provided in each of the notches 4a 1 , 4a 2 , 4b 1 , 4b 2 (not shown) formed in the first filter cloths 2a, 2b. The third filter cloths 3a 1 , 3a 2 , 3b 1 , 3b 2 are installed from the back surface 25 side of the first filter cloths 2a, 2b by, for example, sewing, and the raised portion 10 in the normal filter plate 7 is attached. A covering portion 27 for covering the surfaces of the first filter cloth 2a and 2b, and an overlapping portion 24 formed along the notches 5a and 5b (not shown) of the first filter cloth 2a and 2b. A part of each overlapping portion 23 formed in 3a 1 , 3a 2 , 3b 1 , 3b 2 (a portion disposed on the stock solution hole 22 side of the overlapping portion 23) is replaced with the back surface 25 of the first filter cloth 2 a, 2 b The second filter cloth 6 is formed in a cylindrical shape on the surface 26 side of the bent portion. It is those that have been.
In the filter cloth 1 for the normal filter plate according to the present embodiment, the surface on the side in contact with the surface of the normal filter plate 7 is the back surface 25 and the opposite surface is the surface 26.
In the present embodiment, when wearing the plain filter plates for filter cloth 1 on plain filter plate 7, a portion substantially covering the surface of the raised portion 10 is called a coating portion 27, the first filter cloth They are distinguished from the third filter cloths 3a 1 , 3a 2 , 3b 1 , 3b 2 which are attached to 2a, 2b and form the covering portion 27.
図４は本発明の実施例に係る普通濾板用濾布を普通濾板に装着した場合の断面図である。なお、図１乃至図３に記載されたものと同一部分については同一符号を付し、その構成についての説明は省略する。
図４に示すように、本実施例に係る普通濾板用濾布１を普通濾板７に装着すると、濾板９の濾過面９ａ,９ｂは第１の濾布２ａ,２ｂにより、隆起部分１０の表面は第３の濾布３ａ１,３ａ2,３ｂ１,３ｂ2により、原液孔２２の内側面２２ｂは第２の濾布６により被覆されて、普通濾板７の表面の全てが普通濾板用濾布１により被覆される。
このとき、被覆部２７の平面形状を隆起部分１０の底面と略同一平面形状とし、かつ、被覆部２７を形成する第３の濾布３ａ１,３ａ2,３ｂ１,３ｂ2がいずれも伸縮性を備えることで、隆起部分１０の表面に第３の濾布３ａ１,３ａ2,３ｂ１,３ｂ2を隙間なく密着させることができるという効果を有する。
なお、隆起部分１０の「底面」の概念については後述する。
FIG. 4 is a cross-sectional view of the normal filter plate according to the embodiment of the present invention attached to the normal filter plate. The same parts as those described in FIGS. 1 to 3 are denoted by the same reference numerals, and description of the configuration is omitted.
As shown in FIG. 4, when attaching the plain filter plates for filter cloth 1 according to the present embodiment on plain filter plate 7, filtering surface 9a of the filtration plate 9, 9b by the first filter cloth 2a, 2b, the raised portion The surface of 10 is covered with the third filter cloth 3a 1 , 3a 2 , 3b 1 , 3b 2 , and the inner surface 22b of the stock solution hole 22 is covered with the second filter cloth 6. The filter cloth 1 for ordinary filter plates is covered.
At this time, the planar shape of the covering portion 27 is substantially the same planar shape as the bottom surface of the raised portion 10, and the third filter cloths 3a 1 , 3a 2 , 3b 1 , 3b 2 forming the covering portion 27 are all expanded and contracted. By having the property, the third filter cloth 3a 1 , 3a 2 , 3b 1 , 3b 2 can be brought into close contact with the surface of the raised portion 10 without a gap.
The concept of the “bottom surface” of the raised portion 10 will be described later.
なお、本実施例でいう伸縮性とは、隆起部分１０の底面と略同一の平面形状（面積）を有する被覆部２７を、隆起部分１０の表面と少なくとも同じ大きさにまで広げられることを意味している。
そして、このような伸縮性を付与する方法としては、難伸縮性の糸を用いて織り方や編み方を適宜選択することにより濾布に伸縮性を付与する方法と、濾布を形成する糸又は繊維自体に伸縮性付与して編み方や織方によらず濾布に伸縮性を付与する方法の２種類があり、本実施例においてはいずれを用いてもよい。
The stretchability in this embodiment means that the covering portion 27 having a plane shape (area) substantially the same as the bottom surface of the raised portion 10 can be expanded to at least the same size as the surface of the raised portion 10. is doing.
As a method for imparting such stretchability, a method for imparting stretchability to a filter cloth by appropriately selecting a weaving method or a knitting method using a hardly stretchable yarn, and a yarn for forming a filter cloth Alternatively, there are two types of methods of imparting stretchability to the fiber itself and imparting stretchability to the filter cloth regardless of how to knit or weave, and any of them may be used in this embodiment.
このように、隆起部分１０の表面に隙間なく被覆部２７を密着させることで、隆起部分１０の周辺、及び、隆起部分の表面にシワ、ツレ、タルミが生じるのを抑制することができるという効果を有する。
よって、本実施例に係る普通濾板用濾布１によれば、普通濾板７に装着した状態でスラリー状の原液の圧搾を繰り返した場合に濾過面９ａ,９ｂ上にシワが生じてその部分に過大な付加がかかる等して普通濾板用濾布１が破損するのを防止することができるという効果を有する。
従って、本実施例に係る普通濾板用濾布１の耐久性を向上することができるという効果を有する。
また、第１の濾布２ａ,２ｂに第３の濾布３ａ１,３ａ2,３ｂ１,３ｂ2を接合する際に、第３の濾布３ａ１,３ａ2,３ｂ１,３ｂ2に形成される重なり部２３を、図４にも示されるように、普通濾板７の濾過面９ａ,９ｂに直接接触させるように配置することで、装着時に第３の濾布３ａ１,３ａ2,３ｂ１,３ｂ2に、隆起部分１０により押し上げられるような力が作用した際に、重なり部２３と第１の濾布２ａ,２ｂとの接合部２８を引き剥がすように力が作用するのを防止することができる。
言い換えると、第３の濾布３ａ１,３ａ2,３ｂ１,３ｂ2の外縁に形成される重なり部２３を普通濾板７の濾板９側に配置し、その上に第１の濾布２ａ,２ｂを配置してこれらを接合することで、第３の濾布３ａ１,３ａ2,３ｂ１,３ｂ2に引張力が作用した場合に、接合部２８の重なり部２３から第１の濾布２ａ,２ｂが剥がれたり、隙間が生じて、この隙間から濾板９と普通濾板用濾布１の間にスラリー状の原液が流入する等の不具合が生じるのを防止することができるという効果を有する。
In this way, by causing the covering portion 27 to be in close contact with the surface of the raised portion 10 without any gap, it is possible to suppress the occurrence of wrinkles, sag, and tarmi around the raised portion 10 and the surface of the raised portion. Have
Therefore, according to the ordinary filtration plate for filter cloth 1 according to the present embodiment, ordinary filtration plate 7 filtering surface when repeated squeezing of slurry stock while wearing a 9a, wrinkles occur on 9b thereof It has the effect that it can prevent that the filter cloth 1 for normal filter plates breaks, such as applying an excessive addition to a part.
Therefore, it has the effect that the durability of the filter cloth 1 for ordinary filter plates according to the present embodiment can be improved.
The first filter cloth 2a, when bonding the third filter cloth 3a 1, 3a 2, 3b 1 , 3b 2 to 2b, the third filter cloth 3a 1, 3a 2, 3b 1, the 3b 2 As shown in FIG. 4, the formed overlapping portion 23 is arranged so as to be in direct contact with the filtering surfaces 9 a and 9 b of the normal filter plate 7, so that the third filter cloths 3 a 1 and 3 a 2 are attached at the time of mounting. , 3b 1 , 3b 2 , when a force that is pushed up by the raised portion 10 acts, the force acts so as to peel off the joint portion 28 between the overlapping portion 23 and the first filter cloths 2a, 2b. Can be prevented.
In other words, the overlapping portion 23 formed on the outer edge of the third filter cloth 3a 1 , 3a 2 , 3b 1 , 3b 2 is arranged on the filter plate 9 side of the normal filter plate 7, and the first filter cloth is placed thereon. By arranging 2a and 2b and joining them, when a tensile force is applied to the third filter cloths 3a 1 , 3a 2 , 3b 1 , 3b 2 , the first overlap portion 23 of the joint portion 28 is connected to the first filter cloth 3a 1 It is possible to prevent problems such as peeling of the filter cloths 2a and 2b and a gap between the filter plate 9 and the filter cloth 1 for a normal filter plate . It has the effect.
さらに、図４に示すように、本実施例においては、第３の濾布３ａ１,３ａ2,３ｂ１,３ｂ2の重なり部２３と第２の濾布６との接合部２９、および、第１の濾布２ａ,２ｂの重なり部２４と第２の濾布６との接合部（図示せず。）を、原液孔２２内に収容することで、つまり、原液孔２２の内側面２２ｂ上に接合部２９及び、重なり部２４と第２の濾布６との接合部を配置することで、原液孔２２の外周２２ａ近傍の第１の濾布２ａ,２ｂを、濾板９の濾過面９ａ,９ｂに密着させることができるという効果を有する。（図示せず。）
この結果、原液孔２２の周辺にシワ、ツレ、タルミが生じるのを防止することができるという効果を有する。
よって、普通濾板７に本実施例に係る普通濾板用濾布１を装着して圧搾を繰り返した際に、普通濾板用濾布１の局所に原液が触れて擦れが生じたり、押圧力が作用して破損するのを防止することができる。
従って、普通濾板用濾布１の耐久性を向上させることができるという効果を有する。
Furthermore, as shown in FIG. 4, in this embodiment, the joint portion 29 between the overlapping portion 23 of the third filter cloth 3 a 1 , 3 a 2 , 3 b 1 , 3 b 2 and the second filter cloth 6, and The joint portion (not shown) between the overlapping portion 24 of the first filter cloths 2 a and 2 b and the second filter cloth 6 is accommodated in the stock solution hole 22, that is, the inner surface 22 b of the stock solution hole 22. The first filter cloths 2a and 2b in the vicinity of the outer periphery 22a of the stock solution hole 22 are filtered by the filter plate 9 by arranging the joint part 29 and the joint part between the overlapping part 24 and the second filter cloth 6 on the top. It has the effect that it can be made to stick to surfaces 9a and 9b. (Not shown)
As a result, there is an effect that it is possible to prevent wrinkles, sag and sagging around the stock solution hole 22.
Therefore, when the normal filter plate filter cloth 1 according to this embodiment is attached to the normal filter plate 7 and the squeezing is repeated, the undiluted solution touches the local area of the normal filter plate filter cloth 1 to cause rubbing or pressing. It is possible to prevent the pressure from acting and breaking.
Therefore, it has the effect that durability of the filter cloth 1 for normal filter plates can be improved.
そして、第２の濾布６を一定の幅を有するベルト状とすることで、第３の濾布３ａ１,３ａ2,３ｂ１,３ｂ2の重なり部２３と第２の濾布６とを、又は、第１の濾布２ａ,２ｂの重なり部２４と第２の濾布６とを、例えば、縫合により接合する際には、単純な直線縫いをするだけでよい。
また、第２の濾布６としてその長手方向に難伸縮性を有するものを用いることで、縫合時に第２の濾布６が伸びるのを防止することができる。
すなわち、第２の濾布６に第１の濾布２ａを縫合し、その後、第２の濾布６に第１の濾布１ｂを縫合した場合に、第１の濾布２ａ,２ｂの間に相対的な位置ズレが生じるのを防止することができるという効果を有する。
従って、この点からも本実施例に係る普通濾板用濾布１の耐久性を向上させることができるという効果を有する。
Then, by making the second filter cloth 6 into a belt shape having a certain width, the overlapping portion 23 of the third filter cloths 3a 1 , 3a 2 , 3b 1 , 3b 2 and the second filter cloth 6 are formed. Alternatively, when the overlapping portion 24 of the first filter cloths 2a and 2b and the second filter cloth 6 are joined by, for example, stitching, simple straight stitches may be performed.
Moreover, it is possible to prevent the second filter cloth 6 from being stretched during stitching by using the second filter cloth 6 that is difficult to stretch in the longitudinal direction.
That is, when the first filter cloth 2a is stitched to the second filter cloth 6, and then the first filter cloth 1b is stitched to the second filter cloth 6, the gap between the first filter cloths 2a and 2b. It is possible to prevent relative displacement from occurring.
Therefore, also from this point, there is an effect that the durability of the filter cloth 1 for a normal filter plate according to the present embodiment can be improved.
ここで、本実施例に係る普通濾板用濾布１の被覆部２７について図５を参照しながら詳細に説明する。
図５（ａ）は本実施例に係る普通濾板用濾布１を装着するための普通濾板の外観を示す斜視図であり、（ｂ）はその隆起部分の部分拡大図である。なお、図１乃至図４に記載されたものと同一部分については同一符号を付し、その構成についての説明は省略する。また、隆起部分１０を濾板９に固定するための固定具１２の記載は省略した。
先にも述べたように、本実施例に係る普通濾板用濾布１においては、被覆部２７の平面形状を、図５（ａ）に示すような隆起部分１０の底面と略同一に形成している。
ここでいう隆起部分１０の底面１０ａとは、図５（ｂ）において斜線で示される濾板９と隆起部分１０との接触面のことである。なお、図１,４に示される普通濾板７においては、原液孔２２の外周２２ａに面取りが施された場合を示しているが、その場合、隆起部分１０の底面１０ａは、隆起部分１０を濾過面９ａ又は濾過面９ｂで切断した際の切断面とする。
この場合、普通濾板７に設けられる隆起部分１０に被覆部２７をあたかも嵌設するかのように装着することができるという効果を有する。
この結果、隆起部分１０の周辺の濾布にシワ、ツレ、タルミが生じるのを防止することができるという効果を有する。
Here, the covering portion 27 of the normal filter plate filter cloth 1 according to the present embodiment will be described in detail with reference to FIG.
Fig.5 (a) is a perspective view which shows the external appearance of the normal filter plate for mounting | wearing the filter cloth 1 for normal filter plates based on a present Example, (b) is the elements on larger scale of the protruding part. The same parts as those described in FIGS. 1 to 4 are denoted by the same reference numerals, and description of the configuration is omitted. Further, the description of the fixture 12 for fixing the raised portion 10 to the filter plate 9 is omitted.
As mentioned earlier, in the ordinary filter plate for filter cloth 1 according to the present embodiment, forming the planar shape of the covering portion 27, the bottom surface substantially identical raised portion 10 as shown in FIG. 5 (a) is doing.
Here, the bottom surface 10a of the raised portion 10 is a contact surface between the filter plate 9 and the raised portion 10 indicated by hatching in FIG. 1 and 4 show a case where the outer periphery 22a of the stock solution hole 22 is chamfered, but in this case, the bottom surface 10a of the raised portion 10 has the raised portion 10 in place. It is set as the cut surface at the time of cut | disconnecting with the filtration surface 9a or the filtration surface 9b.
In this case, there is an effect that the covering portion 27 can be mounted as if fitted to the raised portion 10 provided on the normal filter plate 7.
As a result, there is an effect that it is possible to prevent wrinkles, sag, and tarmi from occurring on the filter cloth around the raised portion 10.
さらに、本実施例に係る普通濾板用濾布１においては、被覆部２７を構成する濾布（例えば、第３の濾布３ａ１,３ａ2,３ｂ１,３ｂ2）が、底面１０ａに外接する矩形３０を描いた際の略対角方向に、すなわち、図５（ｂ）中の符号Ｇ及びＦで示す方向に少なくとも伸縮するよう構成されている。
この場合、隆起部分１０に被覆部２７を装着した際に、被覆部２７の全面に作用する引張力を略均一にすることができる。
よって、隆起部分１０の表面にシワ、ツレ、タルミが生じるのを防止することができるという効果を有する。
従って、本実施例に係る普通濾板用濾布１によれば、被覆部２７の平面形状を隆起部分１０の底面１０ａと略同一にし、かつ、被覆部２７を構成する濾布が、少なくとも底面１０ａに外接する矩形３０を描いた際の略対角方向に伸縮するよう構成することで、装着時に濾布にシワ、タルミ、ツレが生じるのを好適に防止することができ、この結果、普通濾板用濾布１の耐久性を向上させることができるという効果を有する。
Furthermore, in the normal filter plate filter cloth 1 according to the present embodiment, the filter cloth (for example, the third filter cloths 3a 1 , 3a 2 , 3b 1 , 3b 2 ) constituting the covering portion 27 is formed on the bottom surface 10a. It is configured to expand and contract at least in the substantially diagonal direction when the circumscribed rectangle 30 is drawn, that is, in the directions indicated by the symbols G and F in FIG.
In this case, when the covering portion 27 is attached to the raised portion 10, the tensile force acting on the entire surface of the covering portion 27 can be made substantially uniform.
Therefore, it has the effect that it can prevent that a wrinkle, a slip, and a sagging occur on the surface of the protruding part 10.
Therefore, according to the normal filter plate filter cloth 1 according to the present embodiment, the planar shape of the covering portion 27 is substantially the same as the bottom surface 10a of the raised portion 10, and the filter cloth constituting the covering portion 27 is at least the bottom surface. by configuring to stretch substantially in a diagonal direction when painted rectangle 30 circumscribing the 10a, wrinkle filter cloth when worn, sagging, it is possible to suitably prevent the tsure occurs, as a result, usually It has the effect that the durability of the filter cloth 1 for filter plates can be improved.
最後に、本実施例に係る普通濾板用濾布１を装着した普通濾板７を備えるフィルタープレス装置によってスラリー状の原液が圧搾される仕組みについて図６を参照しながら説明する。
図６は本発明の実施例に係る普通濾板用濾布を装着したフィルタープレスの作動の様子を示す断面図である。なお、図１乃至図５に記載されたものと同一部分については同一符号を付し、その構成についての説明は省略する。
図６に示すように、フィルタープレス装置１９は普通濾板用濾布１を装着した普通濾板７と、濾布１８を装着した圧搾濾板１４とが、それぞれの枠体８の表面を被覆する普通濾板用濾布１と濾布１８同士を隙間なく接触させながら原液孔２２の中心線上に配設されるものである。
また、普通濾板７の濾板９と、圧搾濾板１４の濾板１５との間に形成される空間には、原液孔２２から送給される原液を収容するための原液収容部２１が形成されている。
このようなフィルタープレス装置１９により原液を圧搾して脱水するには、まず、フィルタープレス装置１９の外部から原液孔２２にスラリー状の図示しない原液を送給して、すなわち、図６中の符号Ｉで示す方向から原液孔２２にスラリー状の図示しない原液を送給して原液収容部２１を原液で満たしておく。
次いで、圧搾濾板１４の枠体８の内部に形成される流路１７に外部から液体を送給して濾板１５と、その表面に覆設される可撓材１６との隙間に流し込んでその静圧により、図６中に破線で示すように可撓材１６を原液収容部２１側に膨出させればよい。
そして、可撓材１６の膨出により原液収容部２１の容積が縮減する過程において、図示しない原液に含まれる液体が普通濾板用濾布１や濾布１８を介して染み出して、原液収容部２１内には脱水ケーキが残されるのである。
Finally, the slurry-like stock by the filter press device comprising a plain filter plate 7 equipped with a plain filter plates for filter cloth 1 according to the present embodiment will be explained with reference to FIG mechanism is squeezed.
FIG. 6 is a cross-sectional view showing the operation of the filter press equipped with the filter cloth for ordinary filter plates according to the embodiment of the present invention. The same parts as those described in FIGS. 1 to 5 are denoted by the same reference numerals, and description of the configuration is omitted.
As shown in FIG. 6, the filter press device 19 includes a normal filter plate 7 equipped with a normal filter plate filter cloth 1 and a compressed filter plate 14 fitted with a filter cloth 18 covering the surface of each frame body 8. The normal filter plate filter cloth 1 and the filter cloth 18 are arranged on the center line of the stock solution hole 22 while making contact with each other without a gap.
Further, in a space formed between the filter plate 9 of the normal filter plate 7 and the filter plate 15 of the squeezing filter plate 14, there is a stock solution storage portion 21 for storing the stock solution fed from the stock solution hole 22. Is formed.
In order to squeeze and dehydrate the stock solution by using such a filter press device 19, first, a slurry-like stock solution (not shown) is fed from the outside of the filter press device 19 to the stock solution hole 22, that is, a symbol in FIG. 6. A stock solution (not shown) in a slurry state is fed from the direction indicated by I to the stock solution hole 22 to fill the stock solution containing portion 21 with the stock solution.
Next, a liquid is supplied from the outside to the flow path 17 formed inside the frame body 8 of the squeezed filter plate 14 and poured into the gap between the filter plate 15 and the flexible material 16 covered on the surface thereof. With the static pressure, the flexible material 16 may be swelled toward the stock solution containing portion 21 as indicated by a broken line in FIG.
Then, in the process of reducing the volume of the stock solution containing portion 21 due to the bulging of the flexible material 16, the liquid contained in the stock solution (not shown) oozes out through the normal filter plate filter cloth 1 and the filter cloth 18 and contains the stock solution. A dehydrated cake is left in the part 21.
以上述べたように、本実施例に係る普通濾板用濾布１によれば、図６に示すようなフィルタープレス装置１９の普通濾板７に装着した場合にその装着面に、シワ、ツレ、タルミが生じ難くすることができるので、圧搾作業を繰り返した場合でも普通濾板用濾布１の局所に過大な負荷がかかって破損するのを防止することができる。
従って、本実施例に係る普通濾板用濾布１の耐久性を向上させることができるという効果を有する。
また、このような普通濾板用濾布１を複数のパーツ成形する際に特別な縫製技術を要しないので、その生産効率を高めることができると同時に、製品の品質のバラツキを少なくすることができるという効果も有する。
なお、本実施例に係る普通濾板用濾布１に用いられる濾布は、圧搾しようとする原液の特性や、圧搾の目的に応じて適宜選択する必要がある。
このため、本実施例に係る普通濾板用濾布１に用いられる濾布は、上述のような構成に加え、原液中の固形分を透過することなく、かつ、原液中の液体を浸透させることができるものであればどのようなものも使用可能である。
さらに、本実施例においては、普通濾板用濾布１を構成する個々のパーツを縫合して接合した場合を例に挙げて説明しているが、普通濾板用濾布１を構成する個々のパーツは、たとえば、熱により圧着しても良いし、接着剤等を用いて接着しても良い。あるいは、例えば、重なり合った接合部の濾布を構成する繊維に外力を加えてこれらを混合することで一体化させて接合してもよい。
As described above, according to the filter cloth 1 for the normal filter plate according to the present embodiment, when it is mounted on the normal filter plate 7 of the filter press device 19 as shown in FIG. Since it is possible to make it difficult for tarmi to occur, it is possible to prevent an excessive load from being applied locally to the filter cloth 1 for a normal filter plate and prevent it from being damaged even when the pressing operation is repeated.
Therefore, it has the effect that the durability of the filter cloth 1 for ordinary filter plates according to the present embodiment can be improved.
In addition, since a special sewing technique is not required when forming such a filter cloth 1 for a normal filter plate , it is possible to increase the production efficiency and reduce variations in product quality. It also has the effect of being able to.
In addition, it is necessary to select suitably the filter cloth used for the filter cloth 1 for normal filter plates which concerns on a present Example according to the characteristic of the undiluted | stock solution which is going to be squeezed, and the objective of squeezing.
For this reason, the filter cloth used for the filter cloth 1 for the normal filter plate according to the present embodiment permeates the liquid in the undiluted solution without passing through the solid content in the undiluted solution in addition to the above-described configuration. Anything that can be used can be used.
Individual Further, in the present embodiment it is described by taking a case of joining by sewing the individual parts constituting the common filter plate for filter cloth 1 as an example, but that constitutes the common filter plate for filter cloth 1 These parts may be bonded by heat, for example, or may be bonded using an adhesive or the like. Alternatively, for example, an external force may be applied to the fibers constituting the filter cloths of the overlapping joints to mix them and join them together.
以上説明したように、本発明はフィルタープレス装置の普通濾板に装着した際にシワ、ツレ、タルミが発生するのを抑制することができる普通濾板用濾布であり、圧搾による脱水処理に関する分野において利用可能である。 As described above, the present invention is a filter cloth for a normal filter plate that can suppress the generation of wrinkles, sag, and tarmi when mounted on a normal filter plate of a filter press device, and relates to a dehydration treatment by pressing. Available in the field.
１…普通濾板用濾布 ２ａ,２ｂ…第１の濾布 ３ａ１,３ａ2,３ｂ１,３ｂ2…第３の濾布 ４ａ１,４ａ2,４ｂ１,４ｂ2…切欠き ５ａ,５ｂ…切欠き ６…第２の濾布 ６ａ,６ｂ…開口端 ７…普通濾板 ８…枠体 ８ａ…表面 ９…濾板 ９ａ，９ｂ…濾過面 １０…隆起部分 １０ａ…底面 １１…ざぐり １２…固定具 １３…縫目 １４…圧搾濾板 １５…濾板 １６…可撓材 １７…流路 １８…濾布 １９…フィルタープレス装置 ２０…補強リング ２１…原液収容部 ２２…原液孔 ２２ａ…外周 ２２ｂ…内側面 ２３,２４…重なり部 ２５…裏面 ２６…表面 ２７…被覆部 ２９…接合部 ３０…矩形 1 ... Average filter plate for filter cloth 2a, 2b ... first filter cloth 3a 1, 3a 2, 3b 1 , 3b 2 ... third filter cloth 4a 1, 4a 2, 4b 1 , 4b 2 ... notches 5a, 5b ... Notch 6 ... Second filter cloth 6a, 6b ... Open end 7 ... Normal filter plate 8 ... Frame body 8a ... Surface 9 ... Filter plate 9a, 9b ... Filtration surface 10 ... Raised portion 10a ... Bottom surface 11 ... Spot 12 DESCRIPTION OF SYMBOLS ... Fixing tool 13 ... Stitch 14 ... Squeeze filter board 15 ... Filter board 16 ... Flexible material 17 ... Flow path 18 ... Filter cloth 19 ... Filter press apparatus 20 ... Reinforcement ring 21 ... Stock solution accommodating part 22 ... Stock solution hole 22a ... Outer periphery 22b ... Inner side surface 23,24 ... Overlapping portion 25 ... Back surface 26 ... Front surface 27 ... Coating portion 29 ... Junction portion 30 ... Rectangle
Claims (5)
この濾布付普通濾板は、普通濾板と、この普通濾板に装着される普通濾板用濾布とを有し、
前記普通濾板は、略矩形の枠体と、この枠体の内側に前記枠体の厚さよりも薄く形成され,被濾過対象である原液を流通させるための原液孔が穿設される濾板と、この濾板の両面に形成されるそれぞれの濾過面の前記原液孔の周りに放射状に配置され，かつ, 前記濾板の厚さ方向に突出する隆起部分と、を備え、
前記普通濾板用濾布は、前記隆起部分の表面を被覆する被覆部を有し、
前記被覆部は、前記隆起部分と前記濾過面との接触面と略同一平面形状であり、かつ、前記接触面において前記原液孔に沿う辺の両端を結ぶ第１の直線を形成し、この第１の直線に直交しかつ前記接触面にそれぞれ接する第２及び第３の直線を形成し、さらに、前記第１の直線と平行でかつ前記接触面に接する第４の直線を形成し、前記第１乃至第４の直線により形成される前記接触面に外接する矩形を描いた場合にその略対角方向に伸縮性を有し、
この伸縮性は、前記被覆部を前記接触面と略同一平面形状から，前記隆起部分の表面と少なくとも同じ大きさにまで，広げられる程度の伸縮性であることを特徴とする濾布付普通濾板。 An ordinary filter plate with a filter cloth used in a squeeze type filter press device ,
Filter cloth with a normal filter plate of this has usually a filtration plate, and an ordinary filter plate for a filter cloth to be attached to this common filter plate,
The plain filter plate, filtration of a substantially rectangular frame body, the frame body is of thinner than the thickness of the inner to the frame, the stock holes for circulating the filtered target der Ru stock is bored comprising a plate, arranged radially around the stock holes of each filter surface formed on both sides of the filtration plate of this, and, and a raised portion that protrudes in the thickness direction of the filtration plate,
The plain filter plate for filter cloth has a covering portion you cover the front surface of the raised portion,
The covering portion, the substantially same planar shape der the contact surface between the raised portion and the filtering surface is, and to form a first straight line connecting both ends of the side along Oite the undiluted hole in the contact surface to form a second and third linear contact respectively orthogonal to the first straight line this and to the contact surface, further, the first straight line and parallel to and a fourth straight line that Sessu to the contact surface is formed and has a stretchability in its substantially diagonally when depicting a rectangle circumscribing the said contact surface that will be more formed on the first to fourth straight line,
Filtration The stretchability, wherein the cover portion contact surface and the substantially same planar shape or al, to the front side of the raised portion and to at least the same size, wherein the elastic der Rukoto degree that extended Normal filter plate with cloth .
前記隆起部分と符合する位置に前記接触面と略同一平面形状を有して形成される第１の切欠きと，前記原液孔と符合する位置に形成される第２の切欠きと,を設けた２枚の第１の濾布と、
これら２枚の第１の濾布の前記第１の切欠きに縫着され前記隆起部分の表面を被覆する前記被覆部と、
前記２枚の第１の濾布の前記第２の切欠きに沿って縫着され、前記原液孔の内側面を被覆するとともに、前記２枚の第１の濾布をつなぎ合わせる第２の濾布とを備えることを特徴とする請求項１に記載の濾布付普通濾板。 The filter cloth for ordinary filter plate is
A first notch formed so as to have substantially the same planar shape as the contact surface at a position coinciding with the raised portion, and a second notch formed at a position coinciding with the stock solution hole. Two first filter cloths,
And the covering portion of these two first filter cloth the the first sewn into the cutout you cover the surface of the raised portion,
The second filter is sewn along the second notch of the two first filter cloths, covers the inner surface of the stock solution hole, and joins the two first filter cloths together. The normal filter plate with a filter cloth according to claim 1, further comprising a cloth.
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| JP6116423B2 (en) * | 2013-07-19 | 2017-04-19 | 中尾フイルター工業株式会社 | A filter cloth for filter press and a filter cloth for filter press. |
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| CN113090192A (en) * | 2021-04-26 | 2021-07-09 | 中铁一局集团有限公司 | Complex stratum rotary drilling steel sleeve matched hole forming method |
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