JPH0753698Y2 - Stacked filter element - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a laminated filter element for microfiltration of chemicals and the like.

[0002]

2. Description of the Related Art As a filter element for purifying chemicals, pure water, gas bodies, etc. used in the production of various medicines and electronic parts, chemical resistance and submicron order filtration accuracy are desired. As one of those corresponding to this, a laminated type filter element as shown in FIGS. 4A and 4B has been known so far.

That is, it is made of a chemical resistant synthetic resin such as polytetrafluoroethylene or polypropylene, has a slightly elevated annular boss portion 1a at the center, and has a boss portion 1 at the peripheral edge portion 1b.
On the upper and lower surfaces of the disk-shaped disc 1 having a plurality of protruding ribs 4 having the same height as a, the ridges 2a meandering from the central boss portion 1a toward the peripheral portion 1b communicate with the boss portion 1a. A plurality of rows are formed by being divided by the grooves 2b, and the porous annular membrane filter material 3 made of the above resin material is disposed above and below the disk 1, and the inner and outer peripheral edges thereof are the disk 1.
Is attached by welding to the inner and outer peripheral portions thereof, or the inner peripheral edge thereof is attached by welding the upper filter material and the lower filter material to each other, and a large number of such discs 1 are stacked, and the end plates 5 are attached to the upper and lower ends thereof. 6
These are welded together at the peripheral ribs 4 and the outlet tube portion 5a provided on the upper end plate 5 is replaceably attached to the take-out tube 7a of the container 7 by screwing or the like.

[0004]

By the way, the above-mentioned conventional filter element is constructed so that the whole is connected only by the protruding rib portion provided at the peripheral portion of the disk, so that when assembled in a container, If a strong torsional force or tensile force is applied to the element by screwing or press-fitting the outlet tube of the upper end plate into the pipe, the element will have poor rigidity and the rib connection will be broken or the membrane filter will be damaged. It becomes useless.

Therefore, in the present invention, when the membrane-shaped filter medium is assembled into a container, no unreasonable twisting or tension acts on the membrane-shaped filter medium,
An object of the present invention is to provide a filter element that maintains rigidity and can be used for a long period of time.

[0006]

Based on the above-mentioned object, the present invention, as a laminated filter element, is made of a synthetic resin and has a plurality of ribs on the periphery thereof, and a porous membrane filter material is arranged above and below. A required number of discs are laminated, and an upper end plate having an outlet tube portion at its upper end and a plurality of radial protrusions at its periphery is provided, and a lower end plate is provided at the lower end to form a disc laminated body. The disc laminated body is housed in a cage-shaped outer frame, and the radial protrusions of the upper end plate are respectively locked to a plurality of upright ear pieces provided on the upper edge of the outer frame, while the ribs of each disc are It is characterized in that they are respectively engaged with the vertical recesses provided on the inner surface of the vertical piece of the outer frame.

[0007]

Function When the element is assembled, even if a twisting force or a vertical force is applied to the element, those forces are first received by the rigid outer frame body, and then the upright ear pieces provided on the outer frame body. Through the protrusions on the upper end plate and through the recesses formed in the vertical piece of the outer frame to the ribs on each disc, applying a strong force to a specific part. There is no.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 (a) shows a half-cut side surface of an embodiment of the present invention, and FIG. 1 (b) shows a partially cut flat surface of the disk-shaped disc 11 as described above. Is made of chemical-resistant synthetic resin such as polytetrafluoroethylene or polypropylene, has a slightly elevated annular boss 11a in the center, and has a protruding rib 14 at the same height as the boss 11a at the peripheral edge 11b. And a plurality of chevron-shaped protrusions that meander from the central boss portion 11a toward the peripheral portion 11b on the upper and lower surfaces.
A plurality of rows are formed by being divided by a radial groove communicating with. Further, a porous annular membrane filter material 13 made of the above synthetic resin material is disposed above and below the disk 11, and the inner and outer peripheral edges thereof are welded to the inner and outer peripheral portions of the disk 11, or the upper and lower inner peripheral edges thereof are formed. The filter media 13 are attached to each other by welding. A large number of such discs 11 are laminated, and end plates 15 and 16 of the same material are provided on the upper and lower ends thereof, and these are integrally joined by means such as welding at the ribs 14 at the periphery of the discs 11.

By the way, FIG. 2 (a) shows the upper end plate 15, which is an outlet tube portion 15a having a thread on the outer periphery at the center (this is not a screw but an O-ring is provided to be a press-fit type). The outer end surface 15c is provided with a plurality of radial projections 15b whose outer end surface 15c is a slope of a lower recess as shown in the figure or which is a normal standing surface.

FIG. 2B also shows the lower end plate 16 when it is turned upside down. The central portion with which the disk 11 contacts is formed thick as shown by the dotted line, and the lower surface (upper surface in the drawing).
A plurality of (four in the figure) arc-shaped main ribs 16a projecting downward at a position slightly inward of the peripheral edge are provided at regular intervals in the circumferential direction, and a gap is further provided inside the arc-shaped ribs. Arc-shaped sub-ribs 16b are provided so as to extend over the space between the 16a.

Further, FIG. 3 (a) shows an outer frame 17 for accommodating the disc laminated body, and by combining the disc 11 and a plurality of vertical pieces 17a and horizontal pieces 17b with the synthetic resin, the upper surface Is formed into a cage shape having a large number of windows on its side surface, and a plurality of gate-shaped upright ear pieces 18 in which the upper edge inner surface 18a is slanted downwardly on the uppermost annular lateral piece 17b. Is provided so as to be flush with the vertical piece 17a, and the bottom portion 17c of the outer frame 17 has an annular shape as shown in FIG. 3B, and is formed on the plate portion between the outer peripheral edge and the inner peripheral edge. The arc-shaped elongated holes 19 having substantially the same lengths to fit the main ribs 16a on the lower end plate 16 are circumferentially formed in the same number and at the same intervals as the main ribs 16a. Further, a vertical recess 17d is provided on the inner surface of each vertical piece 17a of the outer frame body 17.

Then, the above-mentioned laminated body of the disks 11 is inserted into the cage-shaped outer frame body 17 from above, and the arc-shaped main ribs 16a on the lower surface of the lower end plate 16 are attached to the outer frame body bottom portion 17.
As shown in FIG. 1, the sub-ribs 16b are fitted in the inner holes along the inner peripheral edge of the elongated hole 19 of FIG. 15c and the upper edge inclined inner surface 18a of each gate-shaped ear piece 18 on the outer frame 17 are slid outwardly while pushing each ear piece 18 outward, and snap into and engage therewith. Each rib 14 of each disk 11 engages with a vertical recess 17d on the inner surface of the vertical piece 17a of the outer frame 17 to form a filter element in which the disk laminated body is covered with the outer frame 17 as shown in FIG. To be done.

In assembling to the container, the outlet tube portion 15a on the upper end plate 15 is replaceably connected to the thread groove provided on the inner surface of the take-out pipe 20a of the upper container 20 by screwing or press fitting, and then. , The lower half is inserted into the lower container 21, and the upper and lower containers 20, 21 are airtightly attached.

In this case, the disk laminated body is covered with a cage-shaped outer frame body 17, and a plurality of radial protrusions 15b on the periphery of the upper end plate 15 are engaged with a plurality of ear pieces 18 on the outer frame body 17. At the same time, since each rib 14 of each disk 11 is engaged with the recess 17d of the vertical piece 17a of the outer frame body 17 and integrated with the frame body, a force in the rotational direction or the vertical direction acts by screwing or press fitting. However, they are received by the outer frame body 17, and the rib coupling portion of the disk laminated body is not burdened. Also,
At this time, the main and sub ribs 16a and 16b on the lower surface of the lower end plate 16
Are held on the standing ribs 22 at the bottom of the lower container 21.
At the time of use, the fluid to be treated is sent into the case from the inlet pipe 21a of the lower container 21, and the fluid is passed from the peripheral portion of the filter element through the window hole of the outer frame 17 to each disc 1.
It enters the gap between the first and second parts, is purified by passing through the membrane filter medium 13, flows to the central part, and is taken out to the outside through the outlet tube part 15a and the take-out pipe 20a.

[0014]

As described above, according to the present invention, the disc laminated body is housed in the cage-shaped outer frame body as a filter element of the type in which the discs having the porous membrane-like filter media arranged one above the other are laminated. A plurality of radiating protrusions provided on the upper end plate are respectively locked to the standing ear pieces on the upper edge of the outer frame body, while a plurality of ribs provided on each disc are respectively engaged with the recesses of the vertical piece of the outer frame body. Therefore, even when twisting or vertical force is applied to the element when it is assembled to the container, those forces are received by the rigid outer frame body, and then the upright ear provided on the upper part of the outer frame body. Disperses uniformly on each projection of the upper end plate through the piece and on each rib of each disk through the recess provided in the vertical piece of the outer frame, and a strong force is applied to a specific portion. Never. Therefore, no load is applied to the joint portion of the disc laminated body, there is no fear of breaking the sealing property due to the disc separation or damaging the membrane filter medium, and stable use is possible. Even if a back pressure is applied by stopping the pump or the like, it is possible to prevent the membrane filter medium from expanding and breaking.

[Brief description of drawings]

FIG. 1A is a half sectional side view of an embodiment of the present invention,
(B) is a plan view in which a part is cut.

2A is a perspective view of an upper end plate, and FIG. 2B is a perspective view of a lower end plate turned upside down.

3A is a perspective view of an outer frame body, and FIG. 3B is a perspective view of a bottom portion taken along line XX in FIG.

4A is a sectional view of a conventional product, and FIG. 4B is a perspective view of a part of the disc.

[Explanation of symbols]

 11 Disc 13 Filter Material 14 Rib 15 Upper End Plate 15a Outlet Cylinder 15b Projecting Piece 16 Lower End Plate 16a Main Rib 16b Sub-Rib 17 Outer Frame 17a Vertical Piece 17b Horizontal Piece 17c Bottom 17d Recess 18 Standing Ear Piece 19 Long Hole

Claims (1)

[Scope of utility model registration request] 1. A required number of discs made of a synthetic resin and having a plurality of ribs on the periphery and porous membrane filters arranged on the top and bottom are laminated, and an exit cylinder is provided at the upper end and a plurality of radials are formed on the periphery. The upper end plate provided with the projecting piece is provided, and the lower end plate is provided at the lower end to form a disk laminated body, and the disk laminated body is housed in a cage-shaped outer frame, and the radial projecting piece of the upper end plate is provided. While engaging with the plurality of upright ear pieces provided on the upper edge of the outer frame, and by engaging the ribs of the discs with the vertical recesses provided on the inner surface of the vertical piece of the outer frame, respectively. Multi-layer type filter element.