JP2021186702A - Filter device and spacer member used in the same - Google Patents

Abstract

To provide a filter device which can smoothen flow of a liquid in a storage container while securing a space between a filter unit and a casing inner surface with a simple structure, and to provide a spacer member used in the filter device.SOLUTION: A filter device filters a liquid and includes: a casing having an end part; a filter unit disposed in the casing so that a gap in which the liquid may flow is formed between the filter unit and an inner peripheral surface of the casing, the filter unit having a first surface through which the liquid passes and a second surface which is provided at a position facing the first surface and through which the liquid passes; and a spacer member disposed between the first surface and the end part, the spacer member having a support part which supports the filter unit on the casing and a communication part which allows the gap and the interior of the filter unit to communicate with each other.SELECTED DRAWING: Figure 1

Description

The present invention relates to a filtration device capable of filtering a liquid and a spacer member used therein.

A filtration unit (ion-exchanger-filled cartridge) for removing trace metal ions in an organic solvent is disclosed (Patent Document 1). This filtration unit includes a cylinder, granular ion exchange resin filled in the cylinder, an upper lid and a lower lid having a plurality of through holes, and an insertion pipe provided in the upper lid and inserted into the discharge pipe of the main body of the apparatus. Has. Further, the filtration unit is installed in the storage container in a state of being connected to the discharge pipe.

International Publication No. 2018/110177

The filtration unit and the storage container for storing the filtration unit can be installed in various directions such as upward, downward, and sideways depending on the surrounding conditions and the availability of space. On the other hand, some filtration units are not small in weight. Therefore, depending on the installation direction of the filtration unit, the filtration unit may be displaced or dropped in the storage container due to the weight of the filtration unit itself. As a result, in the worst case, the inflow surface into the filtration unit may be blocked by the inner surface of the storage container.

Therefore, one of the problems of the present invention is a filtration device capable of smooth flow of liquid in a storage container while securing a space between the filtration unit and the inner surface of the casing with a simple structure, and a spacer used for the filtration device. The purpose is to provide a member.

The above problem is solved by the following invention. That is, the filtration device of the present invention (1) is
A filtration device that filters liquids
With a casing with an end
The liquid is stored in the casing so as to form a gap through which the liquid can flow between the inner peripheral surface of the casing, and the liquid is provided at a position facing the first surface through which the liquid passes and the first surface. A filtration unit having a second surface through which,
A spacer member arranged between the first surface and the end portion, which is a communication portion that communicates the support portion that supports the filtration unit with respect to the casing, the gap, and the inside of the filtration unit. And the spacer member with
To prepare for.

Further, the filtration device of the present invention (2) is the filtration device according to (1).
The ends are formed flat and
The support has an annular portion that abuts on the first surface and one or more legs that are passed between the annular portion and the end of the casing.
The communication portion has one or more cavities provided at positions adjacent to the one or more legs, and a second cavity provided inside the annular portion.

Further, the filtration device of the present invention (3) is the filtration device according to (1).
The ends are formed flat and
The support portion includes an annular portion that abuts on the first surface, a second annular portion that abuts on the end portion, and one or more leg portions that are passed between the annular portion and the second annular portion. Have,
The communication portion includes one or more cavities provided at positions adjacent to the one or more legs, a second cavity provided inside the annular portion, and a second cavity provided inside the second annular portion. It has 3 cavities and.

Further, the filtration device of the present invention (4) is the filtration device according to (1).
The ends are formed flat and
The support portion has a second annular portion that abuts on the end portion and one or more leg portions that are erected vertically from the second annular portion and abut on the first surface.
The communication portion has one or more cavities provided at positions adjacent to the one or more legs, and a third cavity provided inside the second annular portion.

Further, the filtration device of the present invention (5) is the filtration device according to (1).
The end is formed in a dome shape that is convex in the direction away from the filtration unit.
One or more rib portions protruding toward the inside of the casing are provided on the inner surface of the casing.
The support has an annular portion that abuts on the first surface and one or more legs that extend radially outward from the annular portion and have recesses into which the rib portions are inserted.
The communication portion has one or more cavities provided at positions adjacent to the one or more legs, and a second cavity provided inside the annular portion.

Further, the filtration device of the present invention (6) is the filtration device according to (1).
The end is formed in a dome shape that is convex in the direction away from the filtration unit.
The support portion has a flat plate portion that abuts on the first surface, and one or more leg portions that extend from the flat plate portion in an arc shape so as to imitate the dome-shaped end portion.
The communication portion has a plurality of through holes provided in the flat plate portion.

Further, the spacer member for the filtration device of the present invention (7) is
The first surface, which is housed in the casing so that a gap through which the liquid can flow is formed between the casing having an end portion and the inner peripheral surface of the casing, and the liquid passes through, faces the first surface. A spacer member for a filtration device provided with a second surface provided at a position where the liquid passes, and a filtration unit having the same.
It has a support portion that supports the filtration unit with respect to the casing, and a communication portion that communicates the gap with the inside of the filtration unit.

Further, the spacer member of the present invention (8) is the spacer member according to (7).
The support has an annular portion that abuts on the first surface and one or more legs that are passed between the annular portion and the end of the casing.
The communication portion has one or more cavities provided at positions adjacent to the one or more legs, and a second cavity provided inside the annular portion.

Further, the spacer member of the present invention (9) is the spacer member according to (7).
The support portion includes an annular portion that abuts on the first surface, a second annular portion that abuts on the end portion, and one or more leg portions that are passed between the annular portion and the second annular portion. Have,
The communication portion includes one or more cavities provided at positions adjacent to the one or more legs, a second cavity provided inside the annular portion, and a second cavity provided inside the second annular portion. It has 3 cavities and.

Further, the spacer member of the present invention (10) is the spacer member according to (7).
The support portion has a second annular portion that abuts on the end portion and one or more leg portions that are erected vertically from the second annular portion and abut on the first surface.
The communication portion has one or more cavities provided at positions adjacent to the one or more legs, and a third cavity provided inside the second annular portion.

According to the present invention, it is possible to provide a filtration device capable of smooth flow of liquid in a storage container while securing a space between the filtration unit and the inner surface of the casing with a simple structure, and a spacer member used thereof.

It is sectional drawing which shows the filtration apparatus of 1st Embodiment cut in the plane passing through the central axis of a casing. FIG. 3 is a perspective view showing a spacer member housed in a casing by seeing through the internal structure of the filtration device shown in FIG. 1. It is a perspective view which showed the internal structure transparently and showed the spacer member housed in the casing in the filtration apparatus of 2nd Embodiment. It is a perspective view which showed the internal structure transparently and showed the spacer member housed in the casing in the filtration apparatus of 3rd Embodiment. It is a side view which showed the spacer member of the filtration apparatus of 4th Embodiment from the side. It is a bottom view which shows the spacer member shown in FIG. 5 from the lower direction. It is sectional drawing which shows the filtration apparatus of 4th Embodiment cut in the plane passing through the central axis of a casing. It is sectional drawing which shows the filtration apparatus of the modification of 4th Embodiment cut in the plane which passes through the central axis of a casing. It is sectional drawing which shows the filtration apparatus of 5th Embodiment cut in the plane passing through the central axis of a casing. It is a bottom view which showed the spacer member of the filtration apparatus of 5th Embodiment from the lower direction. FIG. 5 is an exploded perspective view schematically showing an internal structure of the filtration device of the fifth embodiment by disassembling the spacer member and the rib portion. FIG. 3 is a cross-sectional view showing the filtration device shown in FIG. 10 cut at a position along the line F12-F12.

An embodiment of a filtration device and a spacer member used thereof will be described. The filtration device can be used, for example, to obtain ultrapure water, pure water, or treated water in a pre-stage for obtaining the pure water. The filtration device can be used for solvent purification of, for example, IPA (isopropanol), PGMEA (propylene glycol monomethyl ether acetate), PGME (propylene glycol monomethyl ether), PGEE (propylene glycol monoethyl ether) and the like. It can also be used for purification of a mixture of the above-mentioned solvent, a solution in which a polymer or the like is dissolved in the above-mentioned solvent, an acid or an alkaline aqueous solution. Alternatively, the filtration device can be used, for example, as a household water purifier for obtaining purified water at home.

The filtration device is a filtration device that filters liquids.
With a casing with an end
The liquid is stored in the casing so as to form a gap through which the liquid can flow between the inner peripheral surface of the casing, and the liquid is provided at a position facing the first surface through which the liquid passes and the first surface. A filtration unit having a second surface through which,
A spacer member arranged between the first surface and the end portion, which is a communication portion that communicates the support portion that supports the filtration unit with respect to the casing, the gap, and the inside of the filtration unit. And the spacer member with
To prepare for.

The inside of the filtration unit can be filled with various filtration materials (particles). The filter medium may be, for example, an ion exchanger, activated carbon, a synthetic adsorbent, or zeolite. Further, a fine particle removal filter may be installed on the upper part (outlet side) of the filtration unit and used in a structure capable of removing fine particles from the particles.

The ion exchange body is, for example, a granular ion exchange resin such as a granular cation exchange resin, a granular chelate resin, a granular anion exchange resin, a combination of a granular cation exchange resin, a granular chelate resin, and a granular anion exchange resin; Monolithic organic porous cation exchanger, monolithic organic porous chelate exchanger, monolithic organic porous anion exchanger, monolithic organic porous cation exchanger, monolithic organic porous chelate exchanger and monolithic organic porous A monolithic organic porous ion exchanger such as a combination of anion exchangers; or a combination of a granular ion exchange resin and a monolithic organic porous ion exchanger. When the ion exchange body is a combination of a granular cation exchange resin, a granular chelate exchange resin, and a granular anion exchange resin, the granular cation exchange resin, the granular chelate exchange resin, and the granular anion exchange resin are uniformly mixed. When used as a mixed bed, the upstream side of the packed region of the ion exchanger is filled with a granular cation exchange resin and / or the granular chelate exchange resin, and the downstream side of the packed region of the ion exchanger is granular. The anion exchange resin of the above is filled, or the upstream side of the packed region of the ion exchange is filled with the granular anion exchange resin, and the downstream side of the filled region of the ion exchange is filled with the granular cation exchange resin and / Or may be used as a double bed filled with granular chelate exchange resin. When the ion exchanger is a combination of a monolithic organic porous cation exchanger and a monolithic organic porous anion exchanger, the monolithic organic porous cation and / or the monolithic organic porous cation and / or are located upstream of the packed region of the ion exchanger. The monolithic organic porous chelate exchanger is filled and the downstream side of the packed region of the ion exchanger is filled with the monolithic organic porous anion exchanger, or the upstream side of the filled region of the ion exchanger. , The monolithic organic porous anion exchanger is filled, and the downstream side of the packed region of the ion exchanger is filled with the monolithic organic porous cation exchanger and / or the monolithic organic porous chelate exchanger. Used as a double bed. When the ion exchanger is a combination of a granular ion exchange resin and a monolithic organic porous ion exchanger, the monolithic organic porous ion exchanger is filled on the upstream side of the packed region of the ion exchanger and the ions are formed. The downstream side of the packed region of the exchanger is filled with a granular ion exchange resin.

The granular cation exchange resin may be a strongly acidic cation exchange resin, a weakly acidic cation exchange resin, a chelate resin, or a combination thereof. Examples of the strongly acidic cation exchange resin include Orlite DS-1, Orlite DS-4 and the like. Examples of the weakly acidic cation exchange resin include amberlite IRC76 and the like. Examples of the chelate resin include Orlite DS-21 and DS-22.

The granular anion exchange resin may be a strong basic anion exchange resin, a weak basic anion exchange resin, or a combination thereof. Examples of the strong basic anion exchange resin include Orlite DS-2 and Orlite DS-5. Examples of the weakly basic anion exchange resin include Orlite DS-6 and the like.

The average particle size of the granular ion exchanger is not particularly limited, but is preferably 200 to 1000 μm, and particularly preferably 300 to 800 μm. The average particle size of the ion exchanger is a value measured by a laser diffraction type particle size distribution measuring device.

The monolithic organic porous ion exchanger is not particularly limited as long as it has an ion exchange group introduced into the monolithic organic porous body. For example, the monolithic organic porous ion exchanger shown below is not particularly limited. Can be mentioned.

The monolithic organic porous ion exchanger is composed of, for example, a continuous skeleton phase and a continuous pore phase, the thickness of the continuous skeleton is 1 to 100 μm, the average diameter of the continuous pores is 1 to 1000 μm, and the total pore volume is 0. .5 to 50 mL / g, cation exchange group or anion exchange group introduced, ion exchange capacity per weight in dry state is 1 to 6 mg equivalent / g, ion exchange group is organic porous ion Examples thereof include a monolithic organic porous ion exchanger uniformly distributed in the exchanger (hereinafter, also referred to as a monolithic organic porous ion exchanger of the first form).

Further, the monolithic organic porous ion exchanger of the first form is a continuous macropore structure in which bubble-shaped macropores overlap each other and the overlapping portion has an opening with an average diameter of 30 to 300 μm, and the total pore volume. 0.5 to 10 ml / g, a cation exchange group or an anion exchange group is introduced, the ion exchange capacity per weight in a dry state is 1 to 6 mg equivalent / g, and the ion exchange group is an organic porous ion. In the SEM image of the cut surface of the continuous macropore structure (dried body) that is uniformly distributed in the exchange body, the area of the skeleton appearing in the cross section is 25 to 50% in the image region. Examples include quality ion exchangers.

Further, as the monolithic organic porous ion exchanger of the first form, the monolithic organic porous ion exchanger has a crosslinked structural unit of 0.1 to 5 among all the structural units into which the ion exchange group has been introduced. From a three-dimensionally continuous skeleton made of an aromatic vinyl polymer containing 0.0 mol% and having an average thickness of 1 to 60 μm, and a three-dimensionally continuous pore having an average diameter of 10 to 200 μm between the skeletons. It is a co-continuous structure, has a total pore volume of 0.5 to 10 mL / g, has a cation exchange group or an anion exchange group introduced, and has an ion exchange capacity of 1 to 6 mg per weight in a dry state. Examples thereof include a monolithic organic porous ion exchanger having an equivalent amount / g and having ion exchange groups uniformly distributed in the organic porous ion exchanger.

When the particles are composed of an ion exchanger, the liquid to be treated (liquid) is, for example, IPA (isopropanol), PGMEA (propylene glycol monomethyl ether acetate), PGME (propylene glycol monomethyl ether), PGEE (propylene glycol monoethyl ether). ), NMP (N-methyl-2-pyrrolidone). An aqueous solution showing acidity to alkalinity may be used as the liquid to be treated (liquid). The impurities removed in the liquid to be treated (liquid) include, for example, metal ions such as Li, Na, Mg, Al, K, Ca, Cr, Mn, Fe, Co, Ni, Cu, Cd, and Pb, Cl, Anions such as SO4, NO3, PO4, CO3, and HCO3, organic acids such as formic acid, acetic acid, maleic acid, and proponic acid, and high-molecular compounds having positive or negative charges.

Activated carbon is a commercially available activated carbon. The diameter of the activated carbon particles is arbitrary. The activated charcoal has fine pores having a diameter of 0.7 nm to several tens of μm, and can physically remove organic impurities (organic acids, dyes, oils, etc.) in the liquid to be treated (liquid). In addition, chlorine can be decomposed by using the carbon component in activated carbon.

Hereinafter, a specific embodiment of the filtration device of the embodiment will be described with reference to the drawings.
[First Embodiment]

The filtration device 11 of the first embodiment will be described with reference to FIGS. 1 and 2. The filtration device 11 includes a filtration unit 13 housed in the casing 12 so that a gap 49 through which liquid can flow is formed between the casing 12 and the inner peripheral surface of the casing 12, and the casing 12 and the filtration unit 13. It has a spacer member 14 arranged between the two.

The casing 12 includes a hollow cylindrical outer cylinder portion 21, an end portion 22 provided at one end of the outer cylinder portion 21, and a flange portion 23 provided on the outer cylinder portion 21 on the opposite side of the end portion 22. , A lid 24 that covers an open portion in the vicinity of the flange portion 23 of the outer cylinder portion 21, a ring-shaped cap member 25 that engages with the collar portion 23, and an arrangement between the outer cylinder portion 21 and the cap member 25. The second O-ring 26 is provided with a first tube 31 integrally formed with the lid 24, and a second tube 32 integrally formed with the lid 24.

The outer cylinder portion 21, the end portion 22, the cap member 25, the lid body 24, the first tube 31, and the second tube 32 are made of, for example, a synthetic resin material, for example, PFA (perfluoroalkoxy alkane), PTFE (polytetrafluoroethylene). ) Etc. are formed. The outer cylinder portion 21, the end portion 22, the cap member 25, the lid body 24, the first pipe 31, and the second pipe 32 may be formed by coating a metal material with a synthetic resin material.

The outer cylinder portion 21 has a liquid draining hole 33 for draining liquid and a cap-shaped closing member 34 for closing the liquid draining hole 33 in the vicinity of the end portion 22. The end portion 22 is formed in a circular flat plate shape, and is integrally formed with the outer cylinder portion 21. The flange portion 23 is integrally formed with the outer cylinder portion 21, and projects outward in a disk shape from the end position opposite to the end portion 22 of the outer cylinder portion 21. The inner surface 35 of the casing 12 includes an inner peripheral surface 35A corresponding to the outer cylinder portion 21 and a bottom surface 35B corresponding to the end portion 22.

The cap member 25 has an engaging portion 36 projecting inward so as to engage the flange portion 23. The cap member 25 has a female screw 37 on the inner peripheral surface for fixing the lid body 24.

The lid 24 has a male screw 38 on the outer peripheral surface that engages with the female screw 37 of the cap member 25. The flow path formed in the first pipe 31 is provided so as to penetrate the lid body 24. Similarly, the flow path formed in the second pipe 32 is provided so as to penetrate the lid body 24.

The second O-ring 26 is arranged between the flange portion 23 of the outer cylinder portion 21 and the cap member 25, and the space between them can be hermetically sealed. The second O-ring 26 is made of, for example, silicon rubber.

The filtration unit 13 is provided on a cylindrical tubular portion 41, a disk-shaped first lid 42 provided on the lower side (end 22 side of the casing 12), and an upper side (flame portion 23 side of the casing 12). The second lid 43, the first mesh 44 provided on the inner surface of the first lid 42, the second mesh 45 provided on the inner surface of the second lid 43, and the second lid 43 are provided so as to penetrate through the second lid 43. The position corresponding to the insertion tube 46, the O-ring 47 provided on the outer peripheral surface of the insertion tube 46, the filtering material (particles for filtration) 48 filled inside the tubular portion 41, and the first lid 42. It has a first surface 51 formed on the outside of the filtration unit 13 and a second surface 52 formed on the outside of the filtration unit 13 at a position corresponding to the second lid 43. The tubular portion 41, the first lid 42, and the second lid 43 are made of, for example, a synthetic resin material, for example, PE (polyethylene), PP (polypropylene), PFA (perfluoroalkoxy alkane), PTFE (polytetrafluoroethylene), PCTFE. It is formed of (polychlorotrifluoroethylene) or the like.

The first lid 42 has a plurality of through-hole portions 42A penetrating in the thickness direction thereof. The diameter of the filtration unit 13 is smaller than the diameter of the outer cylinder portion 21 of the casing 12. Therefore, with the filtration unit 13 housed in the casing 12, a gap is secured between the inner peripheral surface 35A of the casing 12 and the outer peripheral surface of the filtration unit 13.

The insertion tube 46 is integrally formed with the second lid 43. The insertion pipe 46 is connected to the second pipe 32, for example, by being inserted inside the second pipe 32 of the casing 12. An O-ring 47 is interposed between the second pipe 32 and the insertion pipe 46. The O-ring 47 is made of, for example, silicone rubber. The filtration unit 13 is fixed to the second pipe 32 by the grip force of the O-ring 47. The method of connecting the insertion tube 46 and the second tube 32 is an example. For example, the second tube 32 is inserted inside the insertion tube 46, and an O-ring 47 is provided between the insertion tube 46 and the second tube 32. It may be arranged.

The second surface 52 is provided at a position facing the first surface 51 with the filter material 48 interposed therebetween. The first surface 51 and the second surface 52 can pass a liquid (a liquid to be treated or a liquid to be treated). The flow direction of the liquid is, for example, from the inside of the first pipe 31 and the casing 12 (the gap formed between the inner peripheral surface 35A of the casing 12 and the outer peripheral surface of the filtration unit 13) through the first surface 51 and the filtration unit. It reaches the inside of 13, is filtered in the filtration unit 13, passes through the second surface 52, and reaches the insertion pipe 46 and the second pipe 32. The flow direction of the liquid is an example. For example, the insertion pipe 46 and the second pipe 32 reach the inside of the filtration unit 13 through the second surface 52, are filtered in the filtration unit 13, and pass through the first surface 51 to the casing 12. The liquid may flow in the direction toward the inside and the inside of the first pipe 31.

The first mesh 44 and the second mesh 45 are, for example, formed by molding a non-woven fabric into a disk shape and have a fineness such that the filter medium 48 does not pass through the first mesh 44 and the second mesh 45.

The filter medium 48 is composed of, for example, an ion exchanger, but instead of the ion exchanger, activated carbon, a synthetic adsorbent, or zeolite may be used.

As shown in FIG. 2, the spacer member 14 is arranged between the first surface 51 and the end portion 22. The spacer member 14 has a support portion 14A that supports the filtration unit 13 with respect to the casing 12, and a communication portion 14B that communicates the gap 49 with the inside of the filtration unit 13. The support portion 14A has an annular portion 53 that abuts on the first surface 51 of the filtration unit 13 and one or more leg portions 54 that are passed between the first surface 51 and the inner surface 35 of the casing 12. The communication portion 14B has one or more cavity portions 55 provided at positions adjacent to the one or more leg portions 54, and a second cavity portion 56 provided inside the annular portion 53.

The spacer member 14 is integrally molded of, for example, a synthetic resin material. The spacer member 14 is formed of, for example, PE, PP, PFA, PTFE, CTFE, or the like. The annular portion 53 is formed in a ring shape. A liquid flowing through a gap 49 formed between the inner peripheral surface 35A of the casing 12 and the outer peripheral surface of the filtration unit 13 can flow between the outer peripheral surface 53A of the annular portion 53 and the inner peripheral surface 35A of the casing 12. A gap 57 is formed. The diameter of the annular portion 53 is, for example, substantially the same as the diameter of the filtration unit 13.

In the present embodiment, the one or more leg portions 54 are composed of three, but the number of the leg portions 54 is arbitrary, and may be two or less, or four or more. The two or more leg portions 54 are, for example, discretely arranged on the circumference of the annular portion 53 at substantially equal intervals. In the present embodiment, the three leg portions 54 are arranged so as to be displaced by 120 degrees with respect to the center of the annular portion 53.

Each of the one or more leg portions 54 is provided so as to stand up from the annular portion 53. The leg portion 54 is passed between the first surface 51 and the bottom surface 35B of the casing 12 (the first surface 51 is in contact with the first surface 51 via the annular portion 53). The cross-sectional shape of the leg portion 54 is formed to be substantially rectangular, but the cross-sectional shape is not limited to this, and may be circular as a matter of course.

The method of assembling the filtration device 11 of the present embodiment will be described. The operator drops the spacer member 14 from above into the inside of the casing 12 and installs the spacer member 14 on the bottom surface 35B of the casing 12. At this time, the leg portion 54 of the spacer member 14 can come into contact with the end portion 22 formed in the shape of a flat plate. The operator inserts the insertion pipe 46 inside the second pipe 32 and fixes the filtration unit 13 to the second pipe 32. The filtration unit 13 is fixed to the second pipe 32 and the lid 24 by the grip force of the O-ring 47. In this state, the casing 12 is put on the outside of the filtration unit 13 and the filtration unit 13 is housed inside the casing 12. At this time, the second O-ring 26 is arranged between the flange portion 23 of the outer cylinder portion 21 and the lid body 24. The cap member 25 is passed from below to the outside of the outer cylinder portion 21 of the casing 12, and the female screw 37 of the cap member 25 is the male screw of the lid 24 in a state where the engaging portion 36 of the cap member 25 is engaged with the flange portion 23. Fasten to 38. By crushing the second O-ring 26 by the fastening force of the cap member 25, the outer cylinder portion 21 and the lid 24 are liquid-tightly fixed (so that the liquid does not leak). At this time, the spacer member 14 is interposed between the filtration unit 13 and the bottom surface 35B. In this way, the assembly of the filtration device 11 is completed. The second O-ring 26 prevents the liquid from seeping out from the inside of the casing 12.

Subsequently, the operation of the filtration device 11 of the present embodiment will be described. In the present embodiment, the spacer member 14 is interposed between the end portion 22 of the casing 12 and the filtration unit 13 to support the filtration unit 13. Therefore, the filtration unit 13 does not fall off from the second pipe 32 due to its own weight. As a result, the filtration unit 13 is prevented from being displaced in the casing 12.

As shown by the arrow in FIG. 2, the liquid supplied from the first pipe 31 passes between the inner peripheral surface 35A of the casing 12 and the filtration unit 13 (gap 49), and is annular with the inner peripheral surface 35A of the casing 12. It passes through the cavity portion 55 via the space between the portion 53 and the portion (gap 57). The liquid further passes through the second cavity 56 inside the annular portion 53, passes through the first surface 51 of the filtration unit 13 (through hole 42A of the first lid 42, first mesh 44), and passes through the filtration unit 13. Flow in. The liquid is filtered by the filtration unit 13, passes through the second surface 52 of the filtration unit 13 (the insertion pipe 46 of the second lid 43, the second mesh 45), and is discharged as a treatment liquid to the outside of the filtration unit 13. .. The liquid discharged to the outside of the filtration unit 13 is discharged to the outside of the casing 12 via the second pipe 32. As described above, in the present embodiment, even when the spacer member 14 is provided, the liquid processing is smoothly performed without obstructing the inflow of the liquid into the filtration unit 13.

According to this embodiment, the following can be said. The filtration device 11 is a filtration device 11 that filters the liquid, and is a casing so that a gap 49 through which the liquid can flow is formed between the casing 12 having the end portion 22 and the inner peripheral surface 35A of the casing 12. A filtration unit 13 having a first surface 51 housed in the 12 and through which the liquid passes, and a second surface 52 provided at a position facing the first surface 51 and through which the liquid passes, and the first surface 51 and the end portion 22. A spacer member 14 arranged between the spacer member 14 and having a support portion 14A for supporting the filtration unit 13 with respect to the casing 12 and a communication portion 14B for communicating the gap 49 with the inside of the filtration unit 13. A member 14 is provided.

The spacer member 14 for the filtration device is housed in the casing 12 so that a gap 49 through which the liquid can flow is formed between the casing 12 having the end portion 22 and the inner peripheral surface 35 of the casing 12. A spacer member 14 for a filtration device comprising a filtration unit having a first surface 51 through which a liquid passes and a second surface provided at a position facing the first surface 51 and through which a liquid passes, with respect to a casing 12. It has a support portion 14A that supports the filtration unit 13 and a communication portion 14B that communicates the gap 49 with the inside of the filtration unit 13.

The inflow surface of the filtration unit 13 can be prevented from being blocked by a design change of the casing 12, but in that case, a design change is made for all the molds covering the product variations. It takes. Therefore, such a design change requires a large amount of mold repair cost.

According to the above configuration, by providing the spacer member 14, the problem that the first surface 51 of the filtration unit 13 comes into contact with the end portion 22 of the casing 12 and the liquid flow path is blocked is easily and at low cost. can. Further, since the liquid can be circulated through the communication portion 14B, it is possible to prevent the flow of the liquid from being obstructed even when the spacer member 14 is provided. Further, even if the size of the filtration unit 13 is changed, it is sufficient to change the design by changing the length of one or more legs 54 of the spacer member 14, and the design can be changed without requiring the design change of the entire casing 12. The cost can be reduced.

The end portion 22 is formed flat, and the support portion 14A includes an annular portion 53 that abuts on the first surface 51 and one or more leg portions 54 that are passed between the annular portion 53 and the end portion 22 of the casing 12. The communication portion 14A has one or more cavity portions 55 provided at positions adjacent to one or more leg portions 54, and a second cavity portion 56 provided inside the annular portion 53. According to this configuration, since the second cavity portion 56 is formed inside the annular portion 53, the annular portion 53 does not block the main portion of the first surface 51. As a result, the flow of the liquid entering and exiting the filtration unit 13 can be smoothed.

In the following embodiments, the parts different from the first embodiment will be mainly described, and the parts common to the first embodiment will not be illustrated or described. Further, in the following embodiments, the illustration of the drain hole portion 33 and the closing member 34 is omitted.
[Second Embodiment]

The filtration device 11 of the second embodiment will be described with reference to FIG. The structure of the spacer member 14 of the filtration device 11 of the second embodiment is different from that of the first embodiment.

The spacer member 14 has a support portion 14A that supports the filtration unit 13 with respect to the casing 12, and a communication portion 14B that communicates the gap 49 with the inside of the filtration unit 13. The support portion 14A includes an annular portion 53 that abuts on the first surface 51 of the filtration unit 13, one or more leg portions 54 that are passed between the first surface 51 and the inner surface 35 of the casing 12, and an end portion of the casing 12. It has a second annular portion 58 that abuts on 22. The communication portion 14B is provided inside one or more cavity portions 55 provided at positions adjacent to one or more leg portions 54, a second cavity portion 56 provided inside the annular portion 53, and inside the second annular portion 58. It has a third cavity 59 and the like.

The spacer member 14 is integrally molded of, for example, a synthetic resin material. The spacer member 14 is formed of, for example, PE, PP, PFA, PTFE, CTFE, or the like. The annular portion 53 and the second annular portion 58 are formed in a ring shape. A gap 57 is formed between the outer peripheral surface 53A of the annular portion 53 and the inner peripheral surface 35A of the casing 12. The diameters of the annular portion 53 and the second annular portion 58 are, for example, substantially the same as the diameter of the filtration unit 13. The second annular portion 58 has the same form as the annular portion 53. That is, in the present embodiment, when the annular portion 53 is on the upper side and the second annular portion 58 is on the lower side, the same embodiment is obtained even when the annular portion 53 is rotated so as to be interchanged up and down.

In the present embodiment, the one or more leg portions 54 are composed of three, but the number of the leg portions 54 is arbitrary, and may be two or less, or four or more. The two or more leg portions 54 are, for example, discretely arranged at equal intervals on the circumference of the annular portion 53. In the present embodiment, the three leg portions 54 are arranged so as to be displaced by 120 degrees with respect to the center of the annular portion 53.

Each of the one or more leg portions 54 is provided so as to stand up from the annular portion 53. The leg portion 54 is passed between the first surface 51 and the bottom surface 35B of the casing 12. The leg portion 54 is in contact with the first surface 51 via the annular portion 53, and is in contact with the bottom surface 35B via the second annular portion 58. That is, one end side of the leg portion 54 is connected to the annular portion 53, and the other end side of the leg portion 54 is connected to the second annular portion 58. The cross-sectional shape of the leg portion 54 is formed to be substantially rectangular, but the cross-sectional shape is not limited to this, and may be circular as a matter of course.

The method of assembling the filtration device 11 of the present embodiment will be described. The operator drops the spacer member 14 from above into the inside of the casing 12 and installs the spacer member 14 on the bottom surface 35B of the casing 12. At this time, the second annular portion 58 of the spacer member 14 can be brought into close contact with the end portion 22 formed in a flat plate shape. In the present embodiment, since there is no distinction between the upper and lower spacer members 14, there is no problem even if the spacer members 14 rotate inside out at the time of dropping.

The operator inserts the insertion pipe 46 inside the second pipe 32 and fixes the filtration unit 13 to the second pipe 32. The filtration unit 13 is fixed to the second pipe 32 and the lid 24 by the grip force of the O-ring 47. In this state, the casing 12 is put on the outside of the filtration unit 13 and the filtration unit 13 is housed inside the casing 12. At this time, the second O-ring 26 is arranged between the flange portion 23 of the outer cylinder portion 21 and the lid body 24. The cap member 25 is passed from below to the outside of the outer cylinder portion 21 of the casing 12, and the female screw 37 of the cap member 25 is the male screw of the lid 24 in a state where the engaging portion 36 of the cap member 25 is engaged with the flange portion 23. Fasten to 38. By crushing the second O-ring 26 by the fastening force of the cap member 25, the outer cylinder portion 21 and the lid body 24 are liquid-tightly fixed. At this time, the spacer member 14 is arranged between the filtration unit 13 and the bottom surface 35B. This completes the assembly of the filtration device 11. The second O-ring 26 prevents the liquid from seeping out from the inside of the casing 12.

Subsequently, the operation of the filtration device 11 of the present embodiment will be described. In the present embodiment, the spacer member 14 is interposed between the end portion 22 of the casing 12 and the filtration unit 13 to support the filtration unit 13. Therefore, the filtration unit 13 does not fall off from the second pipe 32 due to its own weight. As a result, the displacement of the filtration unit 13 in the casing 12 is prevented.

As shown by an arrow in FIG. 3, the liquid supplied from the first pipe 31 passes between the inner peripheral surface 35A of the casing 12 and the filtration unit 13 (gap 49), and is annular with the inner peripheral surface 35A of the casing 12. It passes through the cavity portion 55 via the space between the portion 53 and the portion (gap 57). The liquid further passes through the second cavity 56, passes through the first surface 51 of the filtration unit 13 (through hole 42A of the first lid 42, first mesh 44), and flows into the filtration unit 13. The liquid is filtered by the filtration unit 13, passes through the second surface 52 of the filtration unit 13 (the insertion pipe 46 of the second lid 43, the second mesh 45), and is discharged as a treatment liquid to the outside of the filtration unit 13. .. The liquid discharged to the outside of the filtration unit 13 is discharged to the outside of the casing 12 via the second pipe 32. As described above, in the present embodiment, even when the spacer member 14 is provided, the liquid treatment is smoothly performed without obstructing the inflow of the liquid into the filtration unit 13.

According to the second embodiment, the following can be said. The end portion 22 is formed flat, and the support portion 14A includes an annular portion 53 that abuts on the first surface 51, a second annular portion 58 that abuts on the end portion 22, and an annular portion 53 and a second annular portion 58. It has one or more leg portions 54 passed between the two, and the communication portion 14B is provided inside the annular portion 53 and one or more cavity portions 55 provided at positions adjacent to the one or more leg portions 54. It has a second cavity portion 56 to be formed, and a third cavity portion 59 provided inside the second annular portion 58.

According to this configuration, since the two annular portions 53 and 58 are connected by the leg portions 54, it is possible to eliminate the distinction between the upper and lower parts of the spacer member 14. Therefore, even when the spacer member 14 is dropped into the casing 12 from above and the spacer member 14 is installed, even if the spacer member 14 bounces off at the end portion 22 and the spacer member 14 rotates inside out, the end portion 14 is rotated. The annular portion that is in contact with the portion 22 can be referred to as the second annular portion 58, and the annular portion on the opposite side thereof can be referred to as the annular portion 53. Therefore, the assembly worker can install the filtration unit 13 from above as it is without worrying about the installation direction of the spacer member 14. Therefore, the efficiency of the assembly work of the filtration device 11 can be improved.
[Third Embodiment]

The filtration device 11 of the third embodiment will be described with reference to FIG. The structure of the spacer member 14 of the filtration device 11 of the third embodiment is different from that of the first embodiment.

As shown in FIG. 4, the spacer member 14 has a support portion 14A that supports the filtration unit 13 with respect to the casing 12, and a communication portion 14B that communicates the gap 49 with the inside of the filtration unit 13. The support portion 14A has a second annular portion 58 that abuts on the end portion 22 of the casing 12 and one or more leg portions 54 that are passed between the first surface 51 and the inner surface 35 of the casing 12. The communication portion 14B has one or more cavity portions 55 provided at positions adjacent to the one or more leg portions 54, and a third cavity portion 59 provided inside the second annular portion 58.

The spacer member 14 is integrally molded of, for example, a synthetic resin material. The spacer member 14 is formed of, for example, PE, PP, PFA, PTFE, CTFE, or the like. The second annular portion 58 is formed in a ring shape. The diameter of the second annular portion 58 is, for example, substantially the same as the diameter of the filtration unit 13.

In the present embodiment, the one or more leg portions 54 are composed of three, but the number of the leg portions 54 is arbitrary, and may be two or less, or four or more. The two or more legs 54 are, for example, discretely arranged at equal intervals on the circumference of the annular portion. In the present embodiment, the three leg portions 54 are arranged so as to be displaced by 120 degrees with respect to the center of the second annular portion 58.

Each of the one or more leg portions 54 is provided so as to stand up from the second annular portion 58. The leg portion 54 is passed between the first surface 51 and the bottom surface 35B of the casing 12. The leg portion 54 is in contact with the bottom surface 35B via the second annular portion 58. That is, one end side of the leg portion 54 is in contact with the first surface 51 at a position deviating from the central portion of the first surface 51. The other end side of the leg portion 54 is connected to the second annular portion 58. The cross-sectional shape of the leg portion 54 is formed to be substantially rectangular, but the cross-sectional shape is not limited to this, and may be circular as a matter of course. The spacer member 14 of the present embodiment may be configured by arranging the spacer members 14 of the first embodiment so as to be interchanged up and down.

The method of assembling the filtration device 11 of the present embodiment will be described. The operator drops the spacer member 14 from above into the inside of the casing 12 and installs the spacer member 14 on the bottom surface 35B of the casing 12. At this time, the second annular portion 58 of the spacer member 14 is installed so as to be in close contact with the flat bottom surface 35B. The operator inserts the insertion pipe 46 inside the second pipe 32 and fixes the filtration unit 13 to the second pipe 32. The filtration unit 13 is fixed to the second pipe 32 and the lid 24 by the grip force of the O-ring 47. In this state, the casing 12 is put on the outside of the filtration unit 13 and the filtration unit 13 is housed inside the casing 12. At this time, the second O-ring 26 is arranged between the flange portion 23 of the outer cylinder portion 21 and the lid body 24. The cap member 25 is passed from below to the outside of the outer cylinder portion 21 of the casing 12, and the female screw 37 of the cap member 25 is the male screw of the lid 24 in a state where the engaging portion 36 of the cap member 25 is engaged with the flange portion 23. Fasten to 38. By crushing the second O-ring 26 by the fastening force of the cap member 25, the outer cylinder portion 21 and the lid body 24 are liquid-tightly fixed. At this time, the spacer member 14 is arranged between the filtration unit 13 and the bottom surface 35B. This completes the assembly of the filtration device 11. The second O-ring 26 prevents the liquid from seeping out from the inside of the casing 12.

Subsequently, the operation of the filtration device 11 of the present embodiment will be described. In the present embodiment, the spacer member 14 is interposed between the end portion 22 of the casing 12 and the filtration unit 13 to support the filtration unit 13. Therefore, the filtration unit 13 does not fall off from the second pipe 32 due to its own weight. As a result, the displacement of the filtration unit 13 in the casing 12 is prevented.

As shown by the arrow in FIG. 4, the liquid supplied from the first pipe 31 passes between the inner peripheral surface 35A of the casing 12 and the filtration unit 13 (gap 49), and passes through the cavity portion 55. The liquid directly passes through the first surface 51 of the filtration unit 13 (through hole portion 42A of the first lid 42, first mesh 44) and flows into the filtration unit 13. The liquid is filtered by the filtration unit 13, passes through the second surface 52 of the filtration unit 13 (the insertion pipe 46 of the second lid 43, the second mesh 45), and is discharged to the outside of the filtration unit 13. The liquid discharged to the outside of the filtration unit 13 is discharged to the outside of the casing 12 via the second pipe 32. As described above, in the present embodiment, even when the spacer member 14 is provided, the liquid treatment is smoothly performed without obstructing the inflow of the liquid into the filtration unit 13.

According to this embodiment, the following can be said. The end portion 22 is formed flat, and the support portion 14A has a second annular portion 58 that abuts on the end portion 22 and one or more that are erected vertically from the second annular portion 58 and abut on the first surface 51. The communication portion 14B has one or more cavity portions 55 provided at positions adjacent to one or more leg portions 54, and a third cavity portion provided inside the second annular portion 58. 59 and. According to this configuration, the portion that abuts on the end portion 22 can be formed into an annular shape, whereby a large area of the portion that abuts on the end portion 22 in the spacer member 14 can be secured. As a result, the installation stability of the spacer member 14 can be improved, and the spacer member 14 can be prevented from tipping over. Therefore, for example, when the spacer member 14 is dropped into the casing 12 from above at the time of assembling the filtration device 11 and the spacer member 14 is installed, even if the spacer member 14 bounces off at the end portion 22, the spacer member 14 falls over. It is possible to prevent it from happening as much as possible. Therefore, the work efficiency of the worker who performs the assembly work can be improved. Further, by providing the third cavity portion 59, the amount of material required to form the spacer member 14 can be reduced, and the weight of the spacer member 14 can be reduced.
[Fourth Embodiment]

The filtration device 11 of the fourth embodiment will be described with reference to FIGS. 5 to 7. In the filtration device 11 of the fourth embodiment, the structure of the end portion 22 of the casing 12 and the structure of the spacer member 14 are different from those of the first embodiment.

As shown in FIG. 7, in the present embodiment, the end portion 22 of the casing 12 is formed in a dome shape that is convex in a direction away from the filtration unit 13.

The spacer member 14 has a support portion 14A that supports the filtration unit 13 with respect to the casing 12, and a communication portion 14B that communicates the gap 49 with the inside of the filtration unit 13. As shown in FIGS. 5 to 7, the support portion 14A has one or more annular portions 53 that abut on the first surface 51 of the filtration unit 13 and one or more that are passed between the first surface 51 and the inner surface 35 of the casing 12. It has a leg portion 54 and. The communication portion 14B has one or more cavity portions 55 provided at positions adjacent to the one or more leg portions 54, and a second cavity portion 56 provided inside the annular portion 53. The annular portion 53 is formed in a ring shape. The diameter of the annular portion 53 is, for example, substantially the same as the diameter of the filtration unit 13.

The spacer member 14 is integrally molded of, for example, a synthetic resin material. The spacer member 14 is formed of, for example, PFA, PTFE, CTFE, PE, PP or the like. The annular portion 53 is formed in a ring shape. A gap 57 is formed between the outer peripheral surface 53A of the annular portion 53 and the inner peripheral surface 35A of the casing 12. The diameter of the annular portion 53 is, for example, substantially the same as the diameter of the filtration unit 13.

In the present embodiment, one or more legs 54 are composed of two legs, but the number of legs 54 is arbitrary and may be one or three or more. The two legs 54 intersect at the intermediate portion 54A so as to be orthogonal to each other. As shown in FIG. 6, the legs 54 intersect each other in a cross shape when viewed from below. As shown in FIGS. 5 and 7, the leg portion 54 is formed in an arc shape that is convex in a direction away from the annular portion 53 (filtration unit 13) so as to follow the dome-shaped end portion 22. The two legs 54 are, for example, discretely arranged at equal intervals on the circumference of the annular portion 53. In the present embodiment, the two leg portions 54 are arranged so as to be displaced by 90 degrees with respect to the center of the annular portion 53.

Each of the one or more leg portions 54 is provided so as to stand up from the annular portion 53. The leg portion 54 is passed between the first surface 51 and the bottom surface 35B of the casing 12 (the first surface 51 is in contact with the first surface 51 via the annular portion 53). The cross-sectional shape of the leg portion 54 is formed to be substantially rectangular, but the cross-sectional shape is not limited to this, and may be circular as a matter of course.

Although it is shown in FIG. 7 that there is a slight gap between the leg portion 54 and the end portion 22, the leg portion 54 is actually formed at the end portion 22 in the middle portion 54A and its vicinity. It is in contact. Further, in FIG. 7, the leg portion 54 is shown to be curved with a constant curvature, but may be formed so as to change the curvature in the middle. For example, in the middle portion 54A of the leg portion 54 and its vicinity, the curvature of the leg portion 54 is substantially equal to the curvature of the bottom surface 35B of the end portion 22, and the leg portion 54 is located outside the middle portion 54A of the leg portion 54. The curvature of may be larger than the curvature of the bottom surface 35B of the end portion 22. As a result, the intermediate portion 54A and its vicinity can be brought into contact with the end portion 22, and a gap can be formed between the bottom surface 35B of the end portion 22 and the leg portion 54 in the vicinity of the annular portion 53. As a result, a gap 57 can be secured between the outer peripheral surface 53A of the annular portion 53 and the inner peripheral surface 35A of the casing 12.

The method of assembling the filtration device 11 of the present embodiment will be described. The operator drops the spacer member 14 from above into the inside of the casing 12 and installs the spacer member 14 on the bottom surface 35B of the casing 12. At this time, since the leg portion 54 of the spacer member 14 has a shape that imitates the dome-shaped end portion 22, the spacer member 14 can be installed so as to be in close contact with the bottom surface 35B of the end portion 22. The operator inserts the insertion pipe 46 inside the second pipe 32 and fixes the filtration unit 13 to the second pipe 32. The filtration unit 13 is fixed to the second pipe 32 and the lid 24 by the grip force of the O-ring 47. In this state, the casing 12 is put on the outside of the filtration unit 13 and the filtration unit 13 is housed inside the casing 12. At this time, the second O-ring 26 is arranged between the flange portion 23 of the outer cylinder portion 21 and the lid body 24. The cap member 25 is passed from below to the outside of the outer cylinder portion 21 of the casing 12, and the female screw 37 of the cap member 25 is the male screw of the lid 24 in a state where the engaging portion 36 of the cap member 25 is engaged with the flange portion 23. Fasten to 38. By crushing the second O-ring 26 by the fastening force of the cap member 25, the outer cylinder portion 21 and the lid body 24 are liquid-tightly fixed. At this time, the spacer member 14 is arranged between the filtration unit 13 and the bottom surface 35B. This completes the assembly of the filtration device 11. The second O-ring 26 prevents the liquid from seeping out from the inside of the casing 12.

Subsequently, the operation of the filtration device 11 of the present embodiment will be described. In the present embodiment, the spacer member 14 is arranged between the end portion 22 of the casing 12 and the filtration unit 13, and can support the filtration unit 13. Therefore, the filtration unit 13 does not fall off from the second pipe 32 due to its own weight. As a result, the filtration unit 13 is prevented from being displaced in the casing 12.

As shown by an arrow in FIG. 7, the liquid supplied from the first pipe 31 passes between the inner peripheral surface 35A of the casing 12 and the filtration unit 13 (gap 49), and is annular with the inner peripheral surface 35A of the casing 12. It passes through the cavity portion 55 via the portion 53. The liquid further passes through the second cavity 56, passes through the first surface 51 of the filtration unit 13 (through hole 42A of the first lid 42, first mesh 44), and flows into the filtration unit 13. The liquid is filtered by the filtration unit 13, passes through the second surface 52 of the filtration unit 13 (the insertion pipe 46 of the second lid 43, the second mesh 45), and is discharged as a treatment liquid to the outside of the filtration unit 13. .. The liquid discharged to the outside of the filtration unit 13 is discharged to the outside of the casing 12 via the second pipe 32. As described above, in the present embodiment, even when the spacer member 14 is provided, the liquid treatment is smoothly performed without obstructing the inflow of the liquid into the filtration unit 13.

According to this embodiment, the following can be said. The end portion 22 is formed in a dome shape that is convex in a direction away from the filtration unit 13, and the spacer member 14 has an annular portion 53 that abuts on the first surface 51 and a second cavity provided inside the annular portion 53. Each of the one or more leg portions 54 having the portion 56 and one or more leg portions 54 extends in an arc shape so as to follow the dome-shaped end portion 22.

According to this configuration, when the spacer member 14 is dropped into the casing 12 from above and the spacer member 14 is installed, the spacer member 14 is fitted into the end portion 22, and the spacer member 14 is turned inside out when the spacer member 14 is dropped. It is possible to realize a structure that is difficult to become. This makes it possible to improve the work efficiency of the worker who assembles the filtration device 11.
(Modified example of the fourth embodiment)

The filtration device 11 according to the modified example of the fourth embodiment will be described with reference to FIG. The filtration device 11 according to the modified example of the fourth embodiment is different from the fourth embodiment in the size of the filtration unit 13 and the structure of the spacer member 14. In this modification, the gap 57 through which the liquid can flow is not formed between the outer peripheral surface 53A of the flat plate portion 53 and the inner peripheral surface 35A of the casing 12.

The filtration unit 13 is formed in a cylindrical shape having a diameter smaller than that of the filtration unit 13 of the fourth embodiment.

The spacer member 14 has a support portion 14A that supports the filtration unit 13 with respect to the casing 12, and a communication portion 14B that communicates the gap 49 with the inside of the filtration unit 13. As shown in FIG. 8, the support portion 14A is a flat plate portion 53 that abuts on the first surface 51 of the filtration unit 13, and one or more leg portions 54 that are passed between the first surface 51 and the inner surface 35 of the casing 12. And have. The communication portion 14B has one or more cavity portions 55 provided at positions adjacent to the one or more leg portions 54, and a plurality of through holes 71 (second cavity portions 56) formed in the flat plate portion 53. The flat plate portion 53 is formed in a ring shape. The diameter of the flat plate portion 53 is formed to be larger than the diameter of the filtration unit 13, for example. The area of the first surface 51 of the filtration unit 13 is smaller than the area of the portion of the flat plate portion 53 in which the plurality of through holes 71 are provided.

The spacer member 14 is integrally molded of, for example, a synthetic resin material. The spacer member 14 is formed of, for example, PE, PP, PFA, PTFE, CTFE, or the like. The flat plate portion 53 is formed in a disk shape. The flat plate portion 53 is formed in a grid pattern, and a plurality of through holes 71 are provided at equal intervals. Although the through hole 71 is composed of a round hole, it may be formed as a slit extending radially from the center to the periphery.

In the present embodiment, one or more legs 54 are composed of two legs, but the number of legs 54 is arbitrary and may be one or three or more. The two legs 54 intersect at the intermediate portion 54A so as to be orthogonal to each other. The legs 54 intersect each other in a cross shape when viewed from below. The leg portion 54 is formed in an arc shape that is convex in a direction away from the flat plate portion 53 (filtration unit 13) so as to follow the dome-shaped end portion 22. The two legs 54 are, for example, discretely arranged at equal intervals on the circumference of the flat plate portion 53. In the present embodiment, the two leg portions 54 are arranged so as to be displaced by 90 degrees with respect to the center of the flat plate portion 53.

Each of the one or more leg portions 54 is provided so as to stand up from the flat plate portion 53. The leg portion 54 is passed between the first surface 51 and the bottom surface 35B of the casing 12 (the first surface 51 is in contact with the first surface 51 via the flat plate portion 53). The cross-sectional shape of the leg portion 54 is formed to be substantially rectangular, but the cross-sectional shape is not limited to this, and may be circular as a matter of course. As shown in FIG. 8, the leg portion 54 is in close contact with the bottom surface 35B of the end portion 22.

The method of assembling the filtration device 11 of the present embodiment will be described. The operator drops the spacer member 14 from above into the inside of the casing 12 and installs the spacer member 14 on the bottom surface 35B of the casing 12. At this time, since the leg portion 54 of the spacer member 14 has a shape that imitates the dome-shaped end portion 22, the spacer member 14 can be installed so as to be in close contact with the bottom surface 35B of the end portion 22. The operator inserts the insertion pipe 46 inside the second pipe 32 and fixes the filtration unit 13 to the second pipe 32. The filtration unit 13 is fixed to the second pipe 32 and the lid 24 by the grip force of the O-ring 47. In this state, the casing 12 is put on the outside of the filtration unit 13 and the filtration unit 13 is housed inside the casing 12. At this time, the second O-ring 26 is arranged between the flange portion 23 of the outer cylinder portion 21 and the lid body 24. The cap member 25 is passed from below to the outside of the outer cylinder portion 21 of the casing 12, and the female screw 37 of the cap member 25 is the male screw of the lid 24 in a state where the engaging portion 36 of the cap member 25 is engaged with the flange portion 23. Fasten to 38. By crushing the second O-ring 26 by the fastening force of the cap member 25, the outer cylinder portion 21 and the lid body 24 are liquid-tightly fixed. At this time, the spacer member 14 is arranged between the filtration unit 13 and the bottom surface 35B. This completes the assembly of the filtration device 11. The second O-ring 26 prevents the liquid from seeping out from the inside of the casing 12.

Subsequently, the operation of the filtration device 11 of the present embodiment will be described. In the present embodiment, the spacer member 14 is interposed between the end portion 22 of the casing 12 and the filtration unit 13 to support the filtration unit 13. Therefore, the filtration unit 13 does not fall off from the second pipe 32 due to its own weight. As a result, the filtration unit 13 is prevented from being displaced in the casing 12.

As shown by the arrow in FIG. 8, the liquid supplied from the first pipe 31 passes between the inner peripheral surface 35A of the casing 12 and the filtration unit 13 (gap 49), and is located at the outer edge portion of the flat plate portion 53. It passes through the cavity 55 via the through hole 71. The liquid further passes through the through hole 71 located in the central portion of the flat plate portion 53, passes through the first surface 51 of the filtration unit 13 (through hole portion 42A of the first lid 42, first mesh 44), and passes through the filtration unit. It flows in 13. The liquid is filtered by the filtration unit 13, passes through the second surface 52 of the filtration unit 13 (the insertion pipe 46 of the second lid 43, the second mesh 45), and is discharged as a treatment liquid to the outside of the filtration unit 13. .. The liquid discharged to the outside of the filtration unit 13 is discharged to the outside of the casing 12 via the second pipe 32. As described above, in the present embodiment, even when the spacer member 14 is provided, the liquid treatment is smoothly performed without obstructing the inflow of the liquid into the filtration unit 13.

According to this embodiment, the following can be said. The end portion 22 is formed in a dome shape that is convex in a direction away from the filtration unit 13, and the support portion 14A has a flat plate portion 53 that abuts on the first surface 51 and the dome-shaped end portion 22 from the flat plate portion 53. It has one or more leg portions 54 extending in an arc shape so as to imitate the above, and the communication portion 14B has a plurality of through holes 71 provided in the flat plate portion 53. According to this configuration, even when the end portion 22 is formed in a dome shape, a space is secured between the end portion 22 and the filtration unit 13, and the filtration unit 13 falls off due to its own weight. Can be prevented.
[Fifth Embodiment]

The filtration device 11 of the fifth embodiment will be described with reference to FIG. In the filtration device 11 of the fifth embodiment, the structure of the end portion 22 of the casing 12 and the structure of the spacer member 14 are different from those of the first embodiment.

As shown in FIG. 9, in the present embodiment, the end portion 22 of the casing 12 is formed in a dome shape that is convex in a direction away from the filtration unit 13.

As shown in FIG. 9, the spacer member 14 includes a base 61, a plurality of legs 54 extending radially outward from the base 61, and one or more cavities provided at positions adjacent to the plurality of legs 54. 55 and. The base 61 is formed, for example, in a spherical shape. Each of the plurality of legs 54 may have a circular cross-sectional shape or a flat plate-shaped cross-sectional shape. Since the spacer member 14 of the present embodiment has a plurality of leg portions 54 extending radially from the base portion 61, the spacer member 14 does not have up, down, left, and right sides. The plurality of leg portions 54 are passed between the first surface 51 and the inner peripheral surface 35A of the casing 12 via the base portion 61.

The spacer member 14 is integrally molded by, for example, an elastic body. Therefore, each of the plurality of legs 54 can exhibit flexibility. The spacer member 14 is preferably formed of, for example, a rubber material. As the material of the rubber material of the spacer member 14, for example, silicon rubber or the like is preferable.

The method of assembling the filtration device 11 of the present embodiment will be described. The operator drops the spacer member 14 from above into the inside of the casing 12 and installs the spacer member 14 on the bottom surface 35B of the casing 12. At this time, since the spacer member 14 does not have the upper, lower, left, and right sides, there is no problem even if the spacer member 14 rotates when it comes into contact with the bottom surface 35B. The operator inserts the insertion pipe 46 inside the second pipe 32 and fixes the filtration unit 13 to the second pipe 32. The filtration unit 13 is fixed to the second pipe 32 and the lid 24 by the grip force of the O-ring 47. In this state, the casing 12 is put on the outside of the filtration unit 13 and the filtration unit 13 is housed inside the casing 12. At this time, the second O-ring 26 is arranged between the flange portion 23 of the outer cylinder portion 21 and the lid body 24. The cap member 25 is passed from below to the outside of the outer cylinder portion 21 of the casing 12, and the female screw 37 of the cap member 25 is the male screw of the lid 24 in a state where the engaging portion 36 of the cap member 25 is engaged with the flange portion 23. Fasten to 38. By crushing the second O-ring 26 by the fastening force of the cap member 25, the outer cylinder portion 21 and the lid body 24 are liquid-tightly fixed. At this time, the spacer member 14 is arranged between the filtration unit 13 and the bottom surface 35B. This completes the assembly of the filtration device 11. The second O-ring 26 prevents the liquid from seeping out from the inside of the casing 12.

Subsequently, the operation of the filtration device 11 of the present embodiment will be described. In the present embodiment, the spacer member 14 is interposed between the end portion 22 of the casing 12 and the filtration unit 13 to support the filtration unit 13. Therefore, the filtration unit 13 does not fall off from the second pipe 32 due to its own weight. As a result, the filtration unit 13 is prevented from being displaced in the casing 12.

As shown by the arrow in FIG. 9, the liquid supplied from the first pipe 31 passes between the inner peripheral surface 35A of the casing 12 and the filtration unit 13, and passes through the cavity portion 55. The liquid directly passes through the first surface 51 of the filtration unit 13 (through hole portion 42A of the first lid 42, first mesh 44) and flows into the filtration unit 13. The liquid is filtered by the filtration unit 13, passes through the second surface 52 of the filtration unit 13 (the insertion pipe 46 of the second lid 43, the second mesh 45), and is discharged as a treatment liquid to the outside of the filtration unit 13. .. The liquid discharged to the outside of the filtration unit 13 is discharged to the outside of the casing 12 via the second pipe 32. As described above, in the present embodiment, even when the spacer member 14 is provided, the liquid treatment is smoothly performed without obstructing the inflow of the liquid into the filtration unit 13.

According to this embodiment, the following can be said. The end 22 is formed in a dome shape that is convex in a direction away from the filtration unit 13, the spacer member 14 has a base 61 that supports one or more legs 54, and the one or more legs 54 have one or more legs 54. It is composed of a plurality of legs 54 and extends radially outward from the base 61.

According to this configuration, the spacer member 14 can have no top, bottom, left, and right. Therefore, when the spacer member 14 is dropped into the casing 12 from above and the spacer member 14 is installed, even if the spacer member 14 bounces off at the end portion 22 and rotates, the filtration unit 13 is installed from above as it is. be able to. Therefore, the work efficiency of the worker who assembles the filtration unit 13 can be improved.
[Sixth Embodiment]

The filtration device 11 of the sixth embodiment will be described with reference to FIGS. 10 to 12. In the filtration device 11 of the sixth embodiment, the structure of the casing 12 and the structure of the spacer member 14 are different from those of the first embodiment.

As shown in FIG. 12, in the present embodiment, the end portion 22 of the casing 12 is formed in a dome shape that is convex in a direction away from the filtration unit 13.

As shown in FIG. 11, the casing 12 has one or more rib portions 62 protruding inward at positions straddling the outer cylinder portion 21 and the end portion 22. The one or more rib portions 62 are discretely arranged at equal intervals from each other. In the present embodiment, the three rib portions 62 are arranged so as to be displaced by 120 degrees with respect to the center of the outer cylinder portion 21. Each of the one or more rib portions 62 can be inserted into the recess 63 described later in the spacer member 14. The end portion 22 of the casing 12 may be formed on a circular flat plate, and in this case, one or more rib portions 62 protruding inward from the inner peripheral surface 35A of the casing 12 may be provided. It's fine.

The spacer member 14 has a support portion 14A that supports the filtration unit 13 with respect to the casing 12, and a communication portion 14B that communicates the gap 49 with the inside of the filtration unit 13. As shown in FIGS. 10 and 11, the support portion 14A has one or more annular portions 53 that abut on the first surface 51 of the filtration unit 13 and one or more that are passed between the first surface 51 and the inner surface 35 of the casing 12. It has a leg portion 54 and. The communication portion 14B has one or more cavity portions 55 provided at positions adjacent to the one or more leg portions 54, and a second cavity portion 56 provided inside the annular portion 53. The spacer member 14 has a first end surface 64 facing the first surface 51 of the filtration unit 13 and a second end surface 65 opposite to the first end surface 64.

The spacer member 14 is integrally molded of, for example, a synthetic resin material. The spacer member 14 is formed of, for example, PE, PP, PFA, PTFE, CTFE, or the like. The annular portion 53 is formed in a ring shape. A gap 57 (cavity portion 55) is formed between the outer peripheral surface 53A of the annular portion 53 and the inner peripheral surface 35A of the casing 12. The diameter of the annular portion 53 is, for example, substantially the same as the diameter of the filtration unit 13.

In the present embodiment, the one or more leg portions 54 are composed of three, but the number of the leg portions 54 is arbitrary, and may be two or less, or four or more. The one or more leg portions 54 are, for example, discretely arranged at equal intervals on the circumference of the annular portion 53. In the present embodiment, the three leg portions 54 are arranged so as to be displaced by 120 degrees with respect to the center of the annular portion 53.

Each of the one or more leg portions 54 extends from the annular portion 53 outward in the radial direction of the annular portion 53. The leg portion 54 is passed between the first surface 51 and the inner peripheral surface 35A of the casing 12 (the first surface 51 is in contact with the first surface 51 via the annular portion 53). The cross-sectional shape of the leg portion 54 is formed to be substantially rectangular, but the cross-sectional shape is not limited to this, and may be circular as a matter of course.

The leg portion 54 has a recess 63 extending from the second end surface 65 toward the first end surface 64. The recess 63 is recessed from the second end surface 65. The recess 63 has a bottom portion 63A on the way from the second end surface 65 to the first end surface 64. The recess 63 can receive and hold the rib portion 62 inside.

In the present embodiment, the total area of the plurality of through-hole portions 42A provided on the first surface 51 (first lid 42) of the filtration unit 13 is preferably 30% or more of the total area of the plurality of gaps 57. It is more preferable that the total area of the plurality of gaps 57 is 50% or more. This prevents the liquid pressure from becoming extremely high in the vicinity of the spacer member 14.

The method of assembling the filtration device 11 of the present embodiment will be described. The operator drops the spacer member 14 from above into the inside of the casing 12 and installs the spacer member 14 on the bottom surface 35B of the casing 12. At this time, the rib portion 62 of the casing 12 is correctly inserted into the recess 63 of the leg portion 54 of the spacer member 14. Further, the operator inserts the insertion pipe 46 inside the second pipe 32 and fixes the filtration unit 13 to the second pipe 32. The filtration unit 13 is fixed to the second pipe 32 and the lid 24 by the grip force of the O-ring 47. In this state, the casing 12 is put on the outside of the filtration unit 13 and the filtration unit 13 is housed inside the casing 12. At this time, the second O-ring 26 is arranged between the flange portion 23 of the outer cylinder portion 21 and the lid body 24.

The cap member 25 is passed from below to the outside of the outer cylinder portion 21 of the casing 12, and the female screw 37 of the cap member 25 is the male screw of the lid 24 in a state where the engaging portion 36 of the cap member 25 is engaged with the flange portion 23. Fasten to 38. By crushing the second O-ring 26 by the fastening force of the cap member 25, the outer cylinder portion 21 and the lid body 24 are liquid-tightly fixed. At this time, the spacer member 14 is arranged between the filtration unit 13 and the bottom surface 35B. This completes the assembly of the filtration device 11. The second O-ring 26 prevents the liquid from seeping out from the inside of the casing 12.

Subsequently, the operation of the filtration device of the present embodiment will be described. In the present embodiment, the spacer member 14 is interposed between the end portion 22 of the casing 12 and the filtration unit 13 to support the filtration unit 13. Therefore, the filtration unit 13 does not fall off from the second pipe 32 due to its own weight. As a result, the filtration unit 13 is prevented from being displaced in the casing 12.

As shown by the arrow in FIG. 12, the liquid supplied from the first pipe 31 passes between the inner peripheral surface 35A of the casing 12 and the filtration unit 13 (gap 49), and passes through the cavity 55 (inner circumference of the casing 12). It passes between the surface 35A and the annular portion 53). The liquid further passes through the second cavity 56, passes through the first surface 51 of the filtration unit 13 (through hole 42A of the first lid 42, first mesh 44), and flows into the filtration unit 13. The liquid is filtered by the filtration unit 13, passes through the second surface 52 of the filtration unit 13 (the insertion pipe 46 of the second lid 43, the second mesh 45), and is discharged as a treatment liquid to the outside of the filtration unit 13. .. The liquid discharged to the outside of the filtration unit 13 is discharged to the outside of the casing 12 via the second pipe 32. As described above, in the present embodiment, even when the spacer member 14 is provided, the liquid treatment is smoothly performed without obstructing the inflow of the liquid into the filtration unit 13.

According to this embodiment, the following can be said. The end portion 22 is formed in a dome shape that is convex in a direction away from the filtration unit 13, and one or more rib portions 62 projecting toward the inside of the casing 12 are provided on the inner surface of the casing 12, and the support portion 14A is provided. The communication portion 14B has an annular portion 53 that abuts on the first surface 51, and one or more leg portions that extend radially outward from the annular portion 53 and have a recess 63 into which the rib portion 62 is inserted. Has one or more cavity portions 55 provided at positions adjacent to one or more leg portions 54, and a second cavity portion 56 provided inside the annular portion 53.

According to this configuration, since the rib portion 62 is inserted into the recess 63, the position of the spacer member 14 can be stabilized with respect to the casing 12. As a result, the spacer member 14 can be reliably arranged between the first surface 51 and the end portion 22. This can prevent a problem that the position of the filtration unit 13 is displaced in the casing 12.

The above-described embodiment can be implemented with various replacements and modifications. That is, in the above embodiment, the liquid is supplied from the first pipe 31 to the inside of the casing 12, filtered by the filtration unit 13 and discharged to the second pipe 32, but the flow direction of this liquid is This is just an example, and is not limited to this. The liquid may be supplied from the second pipe 32 to the inside of the casing 12, filtered by the filtration unit 13, and discharged to the first pipe 31. Further, it is naturally possible to realize the invention by appropriately combining the above-described embodiments and modifications.

11 Filtration device 12 Casing 13 Filtration unit 14 Spacer member 22 End 35 Inner surface 35A Inner peripheral surface 35B Bottom surface 51 First surface 52 Second surface 53 Circular portion 54 Leg 55 Cavity 56 Second cavity 57 Gap 61 Base 62 Ribs Part 63 concave

Claims (10)

A filtration device that filters liquids
With a casing with an end
The liquid is stored in the casing so as to form a gap through which the liquid can flow between the inner peripheral surface of the casing, and the liquid is provided at a position facing the first surface through which the liquid passes and the first surface. A filtration unit having a second surface through which,
A spacer member arranged between the first surface and the end portion, which is a communication portion that communicates the support portion that supports the filtration unit with respect to the casing, the gap, and the inside of the filtration unit. And the spacer member with
A filtration device equipped with. The ends are formed flat and
The support has an annular portion that abuts on the first surface and one or more legs that are passed between the annular portion and the end of the casing.
The communication portion has one or more cavities provided at positions adjacent to the one or more legs, and a second cavity provided inside the annular portion.
The filtration device according to claim 1. The ends are formed flat and
The support portion includes an annular portion that abuts on the first surface, a second annular portion that abuts on the end portion, and one or more leg portions that are passed between the annular portion and the second annular portion. Have,
The communication portion includes one or more cavities provided at positions adjacent to the one or more legs, a second cavity provided inside the annular portion, and a second cavity provided inside the second annular portion. The filtration device according to claim 1, which has three cavities and a cavity. The ends are formed flat and
The support portion has a second annular portion that abuts on the end portion and one or more leg portions that are erected vertically from the second annular portion and abut on the first surface.
The filtration according to claim 1, wherein the communication portion has one or more cavities provided at positions adjacent to the one or more legs, and a third cavity provided inside the second annular portion. Device. The end is formed in a dome shape that is convex in the direction away from the filtration unit.
One or more rib portions protruding toward the inside of the casing are provided on the inner surface of the casing.
The support has an annular portion that abuts on the first surface and one or more legs that extend radially outward from the annular portion and have recesses into which the rib portions are inserted.
The communication portion has one or more cavities provided at positions adjacent to the one or more legs, and a second cavity provided inside the annular portion.
The filtration device according to claim 1. The end is formed in a dome shape that is convex in the direction away from the filtration unit.
The support portion has a flat plate portion that abuts on the first surface, and one or more leg portions that extend from the flat plate portion in an arc shape so as to imitate the dome-shaped end portion.
The communication portion has a plurality of through holes provided in the flat plate portion.
The filtration device according to claim 1. The first surface, which is housed in the casing so that a gap through which the liquid can flow is formed between the casing having an end portion and the inner peripheral surface of the casing, and the liquid passes through, faces the first surface. A spacer member for a filtration device provided with a second surface provided at a position where the liquid passes, and a filtration unit having the same.
A spacer member for a filtration device having a support portion that supports the filtration unit with respect to the casing, and a communication portion that communicates the gap with the inside of the filtration unit. The support has an annular portion that abuts on the first surface and one or more legs that are passed between the annular portion and the end of the casing.
The communication portion has one or more cavities provided at positions adjacent to the one or more legs, and a second cavity provided inside the annular portion.
The spacer member according to claim 7. The support portion includes an annular portion that abuts on the first surface, a second annular portion that abuts on the end portion, and one or more leg portions that are passed between the annular portion and the second annular portion. Have,
The communication portion includes one or more cavities provided at positions adjacent to the one or more legs, a second cavity provided inside the annular portion, and a second cavity provided inside the second annular portion. The spacer member according to claim 7, which has three cavities. The support portion has a second annular portion that abuts on the end portion and one or more leg portions that are erected vertically from the second annular portion and abut on the first surface.
The spacer according to claim 7, wherein the communication portion has one or more cavities provided at positions adjacent to the one or more legs, and a third cavity provided inside the second annular portion. Element.

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