JP2004050039A - Supports for filter elements and filter element - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a support for a filter element having a new structure, and a filter element, in which a waste disposal is easily carried out, and manufacturing cost is reduced. <P>SOLUTION: The support 1 is disposed in an inner space of a cylindrical filter part of the filter element and constituted by an integral molding product of synthetic resin. The support has: an inner support part 10 surrounding a central part and axially extending; an outer support 30 approximately concentrically arranged at an outer side of the inner support part 10; and a radial support part 20 laid between the inner support part 10 and the outer support part 30 and radially extending. Notch parts 15, 35 and a through hole in which fluid is radially communicated respectively are formed on the inner support part 10 and the outer support part 30. The notch parts 15, 35 are formed such that they are gouged out from one axial end of the support 1 toward the other end. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a filter element support and a filter element.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there has been known a filter element in which a filtration unit is formed by making the whole into a hollow cylindrical shape and both end surfaces of the filtration unit are closed by upper and lower end plates. Such a filter element is disposed in a case, and allows a fluid such as a liquid or a gas to pass in a radial direction from the outside to the inside of the filtering unit or from the inside to the outside of the filtering unit, thereby forming a fluid. Is filtered.
For example, a filter device shown in FIG. 7 is known as a filter device using such a filter element. The filter device 60 is a filter for filtering a chemical solution used in an industrial machine. A liquid discharge hole 63 is provided at the center of the bottom 62 of the bottomed cylindrical case 61, and a liquid inflow hole 64 is provided on the outer peripheral side thereof. A lid 65 is attached to an open end of the case 61 opposite to the bottom 62. In the case 61, a cylindrical inner pipe 66 having a closed top 66 a is provided upright at the center of the bottom 62, and a through hole 67 for passing a fluid is formed on a side surface of the inner pipe 66. , And the discharge hole 63.
The filter element 50 has a hollow cylindrical filter section 51, and both end faces of the filter section 51 are closed by upper and lower end plates 55 and 56. Each of the end plates 55 and 56 is formed of a ring-shaped metal disk having an opening at the center, and has upright portions at the inner and outer peripheral edges. The filtration unit 51 is arranged on the outer peripheral side of the end plates 55 and 56, and is fixed to the end plates 55 and 56 with an adhesive. An outer porous cylinder 80 is provided on the inner peripheral surface of the filtering section 51 so as to be substantially along the inner peripheral surface. On the inner peripheral edge of the end plates 55 and 56, an inner porous cylinder 81 is provided.
The filter element 50 is mounted via a gasket 68 such that the inner pipe 66 in the case 61 is inserted into the center opening (opening of the end plate). A handle 70 for fixing the filter element 50 is attached to a top end of the inner pipe 66 via a gasket 69. The handle 70 is screwed into a screw portion 66b formed on a side surface of the inner pipe 66. By turning the handle 70, the filter element 50 is pressed axially through the gaskets 68 and 69, and the filter element 50 is sealed so that unfiltered fluid does not enter the inner pipe 66. It has become.
The outer perforated cylinder 80 and the inner perforated cylinder 81 are made of stainless steel having chemical resistance to the liquid so as not to be affected by the processing liquid, and are formed with a large number of through holes so that the fluid can pass therethrough. And a cylindrical body having a height substantially equivalent to the filtration unit 51. The outer porous cylinder 80 mainly supports the filter unit 51 from the inside so that the filter unit 51 is not deformed by a radial pressure difference between the inside and outside of the filter unit 51 due to the passage of the fluid, and retains the filter unit 51. Maintain shape. The inner perforated cylinder 81 secures the rigidity and strength of the filter element 50 so that the filter element 50 can mainly withstand the tightening force in the axial direction for sealing the filter element 50.
[0003]
[Problems to be solved by the invention]
Since the filtering performance of the filter element deteriorates with the passage of time, the filter element needs to be replaced. The filter element is composed of a mixture of different materials such as a filter section 51 made of flammable filter paper or the like and non-combustible metal porous cylinders 80 and 81. However, it is difficult to dispose it by incineration as it is.
Further, even if an attempt is made to recover and disassemble the filter element for reuse, it is not easy because the integrated filter element is not easily disassembled and its cost is high. Since the porous cylinders 80 and 81 are made of stainless steel, the production cost is high. The metal porous cylinder has the disadvantage of being heavy in weight and not easy to transport and handle.
[0004]
On the other hand, it has been already proposed to use a hard synthetic resin porous cylinder formed by injection molding in place of the metal porous cylinder of the filter element, but it has a complicated structure such as a split mold. In addition, the filter elements are diversified, and the sizes thereof are different, so that the cost is inevitably increased. In the filter element as described above, split molds are required to manufacture the outer and inner porous cylinders.
[0005]
The present invention has been made in view of the above problems, and provides a filter element support and a filter element having a novel structure that can be easily disposed of and manufactured at low cost. The purpose is to:
[0006]
[Means for Solving the Problems]
(1) A support disposed in a space inside a cylindrical filtration portion of a filter element,
The support is made of a synthetic resin material,
An inner supporting portion surrounding the central portion and extending in the axial direction; an outer supporting portion arranged substantially concentrically outside the inner supporting portion; and a radially extending bridge between the inner supporting portion and the outer supporting portion. A radial support,
A filter element support in which a cut-out portion or a through hole through which fluid can be communicated in the radial direction is formed in each of the inner support portion and the outer support portion.
[0007]
The present invention can further have the following configuration.
(2) Notches formed in the inner support portion and the outer support portion are formed so as to be cut from one end in the axial direction of the support to the other end.
(3) The support is made of a synthetic resin integrally molded product.
(4) A plurality of supports are configured to be stacked in the axial direction.
(5) One end of the support in the axial direction and the other end of the support in the axial direction have an engaging portion, and the stacked supports are displaced in the radial direction and the circumferential direction. This is configured to prevent the above.
[0008]
Further, the filter element of the present invention, the support for the filter element as described above, is disposed in the inner space of the cylindrical filtration portion of the filter element,
Both ends of the inner support portion and the outer support portion in the axial direction are supported by end plates that close axial end surfaces of the filtration portion.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to examples.
FIG. 1 is a perspective view of a support 1 for a filter element according to an embodiment of the present invention, FIG. 2A is a plan view of the support 1 for a filter element, and FIG. 3 is a bottom view of the filter element support 1, and FIGS. 4 and 5 are front views (one side cross-sectional views) of a filter element 50 using the filter element support 1. FIG. 6 illustrates a filter device 60 using the filter element 50 shown in FIG. In each of the drawings, the same elements are denoted by the same reference numerals, and description thereof may be omitted.
[0010]
The support 1 for a filter element (hereinafter simply referred to as “support”) 1 shown in FIGS. 1 to 3 is formed using a synthetic resin material, for example, polypropylene, polyethylene, polyethylene terephthalate, polyamide, or the like. The synthetic resin is selected in consideration of the type and properties of the fluid to be treated, required strength, cost, and the like.
[0011]
The support 1 includes an inner support 10 surrounding the center portion S and extending in the axial direction, an outer support 30 substantially concentrically disposed outside the inner support 10, the inner support 10 and the outer support 30 and a radial support portion 20 extending radially.
[0012]
The inner supporting portion 10 surrounds the central portion S and extends in the axial direction. That is, the central portion S is surrounded by the inner support portion 10 to form a hollow space, and an inner pipe of a filter device described later is inserted into the central portion S. Therefore, the diameter of the central portion S (the inner diameter of the inner support portion 10) is formed to have a size that matches the outer diameter of the inner pipe. The planar shape of the central portion S (the planar shape of the inner support portion 10) is generally circular because it is adapted to the planar shape of the inner pipe, but may be any shape that matches the planar shape of the inner pipe. The drawing shows an example in which the central portion S is circular.
[0013]
The inner support 10 extends in the axial direction of the support 1 and has a height corresponding to the height of the support 1. A cutout 15 is formed in the inner support 10 so that fluid can be communicated in the radial direction. The notch 15 extends from one axial end (upper end of the support in FIGS. 1 and 2B) 2 of the support 1 to the other end (in the support of FIGS. 1 and 2B). The lower end portion 3 is formed so as to be caught. For this reason, the molding die is not complicated, and the molding is simple. However, a single or a plurality of through holes may be formed instead of the cutouts 15.
[0014]
Outside the inner support portion 10, an outer support portion 30 is disposed substantially concentrically with the inner support portion. The outer support part 30 is formed so as to have an outer diameter corresponding to the inner diameter of the filtration part of the filter element. The planar shape of the outer support portion 30 is generally circular because it matches the inner surface shape of the filtering portion of the filter element, but any shape that matches the inner surface shape of the filtering portion may be used. The illustrated one shows an example in which the planar shape of the outer support portion 30 is circular.
[0015]
The outer support 30 extends in the axial direction of the support 1, similarly to the inner support 10, and has a height corresponding to the height of the support 1. A cutout portion 35 is formed in the outer support portion 30 so that fluid can be communicated in the radial direction. The notch 35 is formed so as to be cut from one end 2 in the axial direction of the support 1 toward the other end 3. For this reason, the molding die is not complicated, and the molding is simple. Of course, one or more through holes may be formed instead of the notch 35.
[0016]
Between the inner support part 10 and the outer support part 30, a radial support part 20 extending radially (extending substantially in the radial direction) is provided. Since the inner support 10 and the outer support 30 are connected by the radial support 20, the rigidity of the support 1 is increased.
The radial support portion 20 is preferably formed in a plate shape as in the illustrated example, because it is easy to mold, but is not limited to this. A through hole may be formed in the plate-like portion, or a plurality of rod-like portions may be arranged without being formed in a plate-like shape.
It is desirable to provide three or more radial support portions 20 at substantially equal intervals in the circumferential direction. The illustrated example shows an example in which eight pieces are provided at equal intervals in the circumferential direction.
Notches 15 and 35 through which fluid can communicate in the radial direction are formed in the inner support 10 and the outer support 30, respectively, between the radial supports 20 and 20 adjacent in the circumferential direction. The cutouts 15 and 35 are formed so as to be cut from one end 2 in the axial direction of the support 1 to the other end 3.
In other words, the notch portions 15 and 35 formed in the inner support portion 10 and the outer support portion 30, respectively, allow the inner support portion 10 and the outer support portion 30 to have the upright wall portion 11 substantially corresponding to the height of the support 1. , 31, and the radial support portion 20 is provided between the upright wall portions 11, 31.
[0017]
On the other end 3 side of the support 1, a plane portion 40 connecting the inner support portion 10, the outer support portion 30, and the radial support portions 20, 20 is provided. The flat portion 40 is not essential, but increases the rigidity of the support 1. Further, through-holes 41 are formed in the flat portion 40, and even when a plurality of supports are stacked and used, a fluid flows in the space between the inner support portion 10 and the outer support portion 30. The support members 1 and 1 can communicate with each other in the axial direction.
[0018]
The support 1 is preferably manufactured by integral molding using means such as injection molding so that the inner support portion 10, the outer support portion 30, and the radial support portion 20 are integrated from the beginning. Thereby, manufacture is simplified, the number of parts can be reduced, and attachment to the filter element is easy. Of course, the support 1 may be configured by appropriately forming the inner support 10, the outer support 30, and the radial support 20 as separate members in advance and then combining them.
[0019]
The diameter and height of the support 1 are determined by the size of the filter element. However, when the shape of the filter element is vertically long, that is, when the height is larger than the diameter, the inner support part 10 and the outer support part 30 The rigidity of the support 1 may decrease depending on the shapes of the cutouts 15 and 35 to be formed.
Therefore, even in such a case, it is preferable that a plurality of the supports 1 be stacked in the axial direction so that the rigidity of the supports 1 is not reduced. In this way, when the used filter element is disassembled and discarded, the support 1 can be divided into a plurality of pieces, so that it is possible to dispose the filter element without using an instrument. Further, it is easy to handle a plurality of filter elements having the same diameter but different heights.
[0020]
The stacking of the support 1 in the axial direction includes an engaging (including fitting) portion in which the one end 2 of the support 1 in the axial direction and the other end 3 of the support 1 in the axial direction are engaged. By providing the support, the supports 1 and 1 may be stacked at a predetermined position. This engaging portion can be provided at any part of the inner support part 10, the outer support part 30, or the radial support part 20, or a part where these are appropriately combined.
[0021]
4 and 5 are front views (one-side cross-sectional views) of the filter element 50 manufactured using the support 1. The support 1 is provided in a space inside the filter unit 51 of the filter element 50 having the hollow cylindrical filter unit 51. These filter elements 1 can be used for, for example, a filter device for filtering various chemicals used in industrial machines.
[0022]
The filter element 50 includes a hollow, substantially cylindrical filter part 51, and an upper end plate 55 and a lower end plate 56 for closing (sealing) each end face in the axial direction. In the illustrated example, the filter section 51 having a hollow cylindrical shape is formed by bending a sheet-like filter medium so as to have a substantially chrysanthemum flower shape in cross section to form a large number of pleats 52. A combustible material such as filter paper or non-woven fabric is used for the filtration unit 51.
[0023]
At the center of the upper end plate 55 and the lower end plate 56, openings 55a, 56a through which the inner pipe of the filter device is inserted are formed.
FIG. 4 illustrates an example in which the upper end plate 55 and the lower end plate 56 are formed of a pre-formed ring-shaped metal disk or a synthetic resin disk. In this case, the filtration unit 51 is fixed to each of the end plates 55 and 56 with an adhesive or the like.
FIG. 5 shows that the upper end plate 55 and the lower end plate 56 are made of a synthetic resin material, and a molten synthetic resin (for example, epoxy resin, polyurethane, or the like) is poured into a mold so that the end plates are filtered by the filtration unit 51 and An example in which the support 1 and the support 1 are integrally formed is illustrated. That is, the filtering unit 51 and the support 1 are embedded in the upper end plate 55 and the lower end plate 56.
By forming the upper end plate 55 and the lower end plate 56 from a synthetic resin material, the filter element 50 does not include a nonflammable metal member. Therefore, the filter element 50 is not disassembled after use. Can be incinerated as it is. When the upper end plate 55 and the lower end plate 56 are made of metal, by removing only the upper end plate 55 and the lower end plate 56, the filtration unit 51 and the support 1 can be discarded as they are. Of course, the filter element 50 may be disassembled after use and the support 1 may be reused.
[0024]
No metal cylinder having a large number of holes is provided inside the filtration unit 51. Instead, a support 1 is provided. The outer surface of the outer support portion 30 of the support 1 is positioned substantially along the inner surface of the filtration portion 51 (may have some clearance). The inner supporting portion 10 of the support 1 is located near the inner peripheral edge of the upper end plate 55 and the lower end plate 56.
A plurality of supports 1 are stacked, and the total height of the supports 1 corresponds to the height of the filtration unit 51. Both ends of each of the inner support 10 and the outer support 30 in the axial direction are upward. It is supported by an end plate 55 and a lower end plate 56.
[0025]
Engagement (fitting) in which one end 2 in the axial direction of the support 1 and the other end 3 in the axial direction of the support are engaged so that the support 1 is stacked at a predetermined position in the axial direction. Etc.).
In the present embodiment, an engagement portion 32 is formed on the lower surface of the other end of the outer support portion 30 so that one end of the upright wall portion 31 of the outer support portion of the other support 1 engages ( 1 to 3). The engagement portions 32 are provided at a plurality of locations so that the plurality of upright wall portions 31 are engaged. Further, as shown in FIG. 3, the engaging portion 32 is provided so as to surround the upright wall portion 31 so as to have a U-shape in plan view. The engagement of the upright wall portion 31 with the engagement portion 32 prevents the stacked supports 1 and 1 from shifting in the radial direction and the circumferential direction. Further, the lower surface of the other end of the inner support portion 10 is engaged with one end of the upright wall portion 11 of the inner support portion of the other support 1 so as to engage with the lower end. An engagement portion 12 is provided at an outer position.
[0026]
FIG. 6 illustrates a filter device 60 using the filter element 50 shown in FIG. The filter device 60 is a filter device used for industrial machines for filtering a chemical solution. A liquid discharge hole 63 is provided at the center of the bottom 62 of the bottomed cylindrical case 61, and a liquid inflow hole 64 is provided on the outer peripheral side thereof. A lid 65 is attached to an open end of the case 61 opposite to the bottom 62. In the case 61, a cylindrical inner pipe 66 having a closed top 66 a is provided upright at the center of the bottom 62, and a through hole 67 for passing a fluid is formed on a side surface of the inner pipe 66. , And the discharge hole 63.
[0027]
The filter element 50 is mounted via a gasket 68 such that the inner pipe 66 in the case 61 is inserted into the opening at the center (the openings 55a and 56a of the end plate). Note that, in FIG. 6, the filter element 50 is arranged in a form that is vertically inverted from that shown in FIGS. A handle 70 for fixing the filter element 50 is attached to a top end of the inner pipe 66 via a gasket 69. The handle 70 is screwed into a screw portion 66b formed on a side surface of the inner pipe 66. By turning the handle 70, the filter element 50 is pressed axially through the gaskets 68 and 69, and the filter element 50 is sealed so that unfiltered fluid does not enter the inner pipe 66. It has become.
[0028]
The fluid that has flowed in from the inflow hole 64 passes through the filtration unit 51 from the outside to the inside, is filtered, and is discharged from the outflow hole 63 via the support 1 and the inner pipe 66. The outer supporting portion 30 mainly supports the filtering portion 51 from the inside so that the filtering portion 51 is not deformed due to a pressure difference in the radial direction between the inside and outside of the filtering portion 51 due to the passage of the fluid. Maintain shape. The inner supporting portion 10 mainly secures the rigidity and strength of the filter element 50 so that the filter element 50 can withstand the tightening force in the axial direction for sealing the filter element 50.
[0029]
The embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and can be implemented with appropriate modifications and the like within the scope of the present invention. For example, the configuration of the filter element formed by applying the support is not limited to the above. In addition, as the configuration of the case in which the filter element using the support is mounted and the means for mounting the filter element in the case, known means can be applied, and is not limited to the above. It is preferably used for a filter element in which the fluid to be treated is a liquid, but can also be applied to an air filter element or the like.
[0030]
【The invention's effect】
As described above, according to the support of the present invention, sufficient rigidity can be obtained by using a synthetic resin material, disposal is easy, and production cost is low. In addition, by increasing the porosity of the support, it is possible to obtain a filter element having a small airflow resistance.
A notch formed in the inner support portion and the outer support portion is formed so as to be cut from one end in the axial direction of the support to the other end, so that a molding die having a complicated structure can be formed. It can be manufactured without using it.
Since the filter element is constituted by a synthetic resin integrally molded product, the number of parts can be reduced, and the manufacture of the filter element is very simple.
By constructing a plurality of supports in the axial direction so that they can be stacked, when the used filter element is disassembled and discarded, the support can be divided into a plurality of pieces. It is possible. Further, it is easy to handle a plurality of filter elements having the same diameter but different heights.
One end in the axial direction of the support has an engaging portion with which the other end in the axial direction of the support is engaged, thereby preventing the stacked supports from shifting in the radial direction and the circumferential direction. With this configuration, the supports can be easily and reliably set at predetermined positions.
Further, since the filter element of the present invention uses the above-described support for a filter element, disposal of the filter element is simplified. Since the support is lighter than a metal support, the weight of the filter element can be reduced. When a synthetic resin is used for the end plate, it can be incinerated and discarded as flammable waste without disassembling the filter element.
[Brief description of the drawings]
FIG. 1 is a perspective view of a filter element support 1 according to an embodiment.
FIG. 2A is a plan view of a filter element support 1, and FIG. 2B is a front view (the right side is a cross-sectional view taken along line bb of FIG. 2A).
FIG. 3 is a bottom view of the filter element support 1. FIG.
FIG. 4 is a front view (one side sectional view) of a filter element 50 using the filter element support 1;
FIG. 5 is a front view (one side sectional view) of a filter element 50 using the filter element support 1;
FIG. 6 is a longitudinal sectional view illustrating a filter device 60 using the filter element 50.
FIG. 7 is a longitudinal sectional view illustrating a conventional filter device.
[Explanation of symbols]
1 Support 10 Inner Support 15 Notch 20 Radial Support 30 Outer Support 32 Engagement 35 Notch 50 Filter Element 51 Filter 55 Upper End Plate 56 Lower End Plate S Center

Claims (6)

A support disposed in the inner space of the cylindrical filtration portion of the filter element,
The support is made of a synthetic resin material,
An inner support that surrounds the central portion and extends in the axial direction; an outer support that is disposed substantially concentrically outside the inner support; and a radially extending bridge between the inner support and the outer support Having a radial support,
A support for a filter element, wherein a cutout portion or a through hole through which a fluid can be communicated in a radial direction is formed in each of the inner support portion and the outer support portion. The filter element support according to claim 1, wherein the cutouts formed in the inner support portion and the outer support portion are formed so as to be cut from one end in the axial direction of the support to the other end. body. The support for a filter element according to claim 1, wherein the support is formed of an integrally molded product of a synthetic resin. The filter element support according to any one of claims 1 to 3, wherein a plurality of supports are configured to be stacked in the axial direction. One end in the axial direction of the support has an engaging portion with which the other end in the axial direction of the support is engaged, thereby preventing the stacked supports from shifting in the radial direction and the circumferential direction. The support for a filter element according to claim 4, wherein the support is configured as described above. The support for a filter element according to any one of claims 1 to 5, which is arranged in a space inside a cylindrical filtering portion of the filter element,
A filter element, wherein both axial ends of an inner support portion and an outer support portion are supported by an end plate that closes an axial end surface of the filtration portion.

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