JPH0728898Y2 - Filter element mounting mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a filter for filtering foreign substances such as bacteria existing in a fluid, and more particularly to a mounting mechanism for a filter element.

[Conventional technology]

In recent years, for example, in a draft beer manufacturing process, it is necessary to filter the beer that has undergone so-called post-fermentation to remove bacteria.
Therefore, for example, the filter 30-1 as shown in the schematic view of FIG. 4 is installed in the manufacturing process flow. As shown in the schematic view of FIG. 4, the filter 30-1 includes the housing 30.
And a plurality of generally cylindrical filter elements 1 arranged therein. Filter element 1
Is roughly divided into a filter base B for mounting and fixing the filter element and a filter medium H for capturing and filtering foreign matters in the fluid, and the filter base B is a disk fixed above the housing. It is detachably attached to the plate-like mounting substrate 20 (the attached state is not clearly shown in the drawing).

At the time of this attachment, conventionally, the attachment method as shown in FIGS. 9 (a) to 9 (c) has been adopted.

[Problems to be solved by the device]

However, as shown in FIG. 9 (a), the nut 13
In the system in which 0 and the screw portion provided at the end of the filter base B are screwed together and the substrate 120 is clamped and fixed,
Although the mounting strength is satisfied, retention of the processing liquid cannot be effectively prevented, the cleaning property becomes insufficient, and the processing liquid is contaminated. The workability of replacing the filter element is also insufficient. On the other hand, as shown in FIG. 9 (b), the seal member 140 (O
Even if it is assembled from above via a ring) and screwed with the screw portion 121, the replacement workability, the contamination prevention of the processing liquid, and the cleaning property are not sufficient. Further, as shown in FIG. 7 (c), the two seal members 141, 142 (O
In the external twist lock system in which the ring) is provided on the side surface of the filter base B, the replacement workability is satisfied, but the mounting strength is not sufficient and the filter element causes axial runout.
Further, in this structure, since the claw portion T is located outside, there is a drawback that the filtering direction is limited.

In view of such circumstances, the present invention solves the above-mentioned problems, can effectively prevent the retention of the processing liquid, is sufficiently satisfied with the cleaning property, and has a filter element excellent in replacement workability and mounting strength. Providing a mounting mechanism.

[Means for Solving the Problems]

In order to solve the above problems, the present invention provides a mounting mechanism for removably mounting a filter element on a board mounting portion.
The filter element includes a protrusion formed on a part of the outer peripheral surface, a first peripheral surface that is larger than the protrusion on one side of the protrusion and that has a second diameter of a smaller diameter on the other side. A filter base portion having at least a peripheral surface is integrated with a filter material for capturing and filtering foreign matters and the like, and in the mounting portion, the first peripheral surface and the second peripheral surface of the filter base portion respectively have sealing members. Has a stepped annular inner peripheral surface to be fitted through, and the inner peripheral surface is provided with a cutout portion into which the projection portion fits and can lock the filter element, and the projection portion has at least two of It was configured to be arranged between the seal members, and the filter base portion and the base attachment portion were detachably attached.

[Action]

As described above, the attachment mechanism of the filter element of the present invention has a so-called twist lock mechanism, and is configured to seal the engagement outer peripheral surface by at least two seal members. Therefore, the replacement workability is extremely simple, and since there is no liquid pool or air pool, there is no contamination of the processing liquid and the cleaning property is good. Further, since the twist lock portion is between the double seals, there is no axial runout of the element, and sufficient mounting strength can be obtained. Therefore, even if a large force is applied, for example, when backwashing, the mounting portion is kept stable.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is a half-piece vertical sectional view of the filter element of the present invention attached to a mounting substrate, and FIGS. 2 (a) and 2 (b).
3A and 3B are a half-piece vertical sectional view and a plan view, respectively, of a filter element of the present invention, and FIGS. 3A and 3B are a plan view and a half-piece vertical sectional view, respectively, of a mounting substrate mounting portion of the filter element.

As shown in FIG. 2, the filter element 1 includes a filter base B for mounting and fixing the filter element 1 on a mounting substrate (not shown), and a filter medium H for trapping and filtering foreign matters in the fluid. Is roughly divided into

The filter base B is attached to the mounting substrate 20 for mounting the filter element 1 with substantially equal force, for example, 2 to
About 6 protrusions 4 are provided on the outer periphery at substantially equal intervals, and a flange having a diameter larger than that of the protrusion 4, that is, the first peripheral surface 2 is provided on the upper side of the protrusion 4 and the filter medium H on the other side is provided with The second peripheral surface 6 having a small diameter is formed coaxially with each other.

In the present embodiment, seal members 2a, 6a such as O-rings are pre-fitted on the first peripheral surface 2 and the second peripheral surface 6 in the grooves provided on the respective peripheral surfaces. It is preferable that the seal members 2a and 6a are provided at the widest intervals as much as possible in order to prevent the liquid from entering the gap between the board mounting portion 20 and the shaft run-out between the seal members 2a and 6a. It is also possible to use a sheet-like sealing material that covers the entire width of the.

Note that, as described above, the number and shape of the protrusions 4 can be arbitrarily selected, and of course, it may be other than that, but the maximum diameter thereof does not project at least from the first peripheral surface, Further, it is required that the diameter is not smaller than the diameter of the second peripheral surface.

In addition, in FIG. 2, the protrusion 4 is illustrated as being formed on the central peripheral surface 4a provided between the first peripheral surface 2 and the second peripheral surface 6. The one with the peripheral surface is
The mounting stability of the filter element can be increased,
In addition, it is preferable that damage to the seal member can be suppressed during mounting.

However, it is also possible to form the protrusion 4 directly on the second peripheral surface 6 as shown in FIG.
Even in that case, the protrusion 4 has two sealing members.
It is preferable to provide it on the side of the first peripheral surface slightly so as to be located between 2a and 6a.

On the other hand, the filter medium H continuously provided to such a base B has a function of capturing and filtering foreign matters contained in the fluid, and usually includes, for example, a sintered body obtained by sintering ceramics or metal powder, and others. A porous body made of organic or inorganic material is formed into various shapes such as a bottomed cylindrical cup shape or a conical shape. Then, the filter medium H and the filter base B are integrated by a method such as welding or adhesion to form a filter element.

A reference numeral 9 in the drawing is a gripping portion when the filter element 1 is handled. In the case of operating while holding the grip portion 9, it is preferable to provide a small-diameter second peripheral surface on the filter medium H side as shown in the figure so that the replacement operation can be performed hygienically and easily.

Next, the board mounting portion 20 for fixing the filter element 1 will be described.

FIG. 3 exemplifies a mounting portion for mounting the filter element described in FIG. 2, and the first peripheral surface 2 and the second peripheral surface 6 have respective seal members on the inner peripheral surface thereof.
A stepped annular inner peripheral surface E is formed which is fitted through 2a and 6a.

The E2 surface has a cutout portion 24a having substantially the same shape as that of the projection portion 4 so that the projection portion 4 can be fitted therein, and a notch having an inner peripheral groove 24b for engaging the filter element by sliding this after fitting. The part 24 is formed.

The inner circumferential groove 24b may be provided over the entire circumference, but only a part of the inner circumferential surface continuing to the defective portion 24a serves as a stopper for facilitating attachment and detachment of the filter element. May be provided.

The filter element 1 and the substrate mounting portion 20 thus formed can be easily attached and detached. First, the protrusion 4 of the filter base portion B is inserted while being aligned with the defective portion 24a of the mounting portion 20.

Then, after the protruding portion 4 has passed the defective portion 24a, the filter element is rotated in a predetermined direction so that the protruding portion 4 is introduced into the groove 24a.

As a result, as shown in FIG.
The filter element 1 can be fixed while being sandwiched in 24b, and the upper and lower sealing members 2a and 6a completely seal the side gaps.

As a method of attaching the seal members 2a and 6a, the seal members 2a and 6a may be preliminarily fitted on the peripheral surface of the filter base B as described above, but other than that, for example, as shown in FIG. It can be implemented by various methods such as a method of providing it on each inner surface of the portion 20 side, a method of inserting it into the gap after attachment as shown in FIG. 7, or a combination thereof.

Further, at the time of mounting, in order to prevent operability and damage to the seal portion, for example, the peripheral edge portion is chamfered, or the peripheral surfaces 2 and 6 of the base B and the mounting portion 20 corresponding to them. For example, each inner peripheral surface may have a conical shape having a taper of about 1 to 15 °, or may have a mortar shape. Particularly, in the case of a conical shape, shaft runout can be further suppressed due to the elasticity of the seal member and the sealing effect can be expected to be improved.

The substrate mounting portion 20 of the filter element 1 combined by such a mechanism is hermetically sealed by, for example, as shown in FIG. 4, mounting a plurality of filter elements on the mounting portion and covering the periphery thereof with the housing 30. Configure the filter.

In this case, however, the housing can be removed at any time and only the element can be replaced if necessary.

Then, in the case of filtration treatment, the stock solution is made to flow into the housing 30 from one inlet, the foreign matter in the stock solution is captured by the filter medium H, and the filtrate once passing through the filter medium is discharged from the outlet on the opposite side to the outside. Is discharged to.

Further, when the filter material is clogged by the filtration, backwashing can be performed by flowing a washing liquid from the direction opposite to the filtration treatment, and continuous treatment can be performed by repeating the washing.

Up to now, the description has been given mainly only in the case where the second peripheral surface having a small diameter is provided on the filter base H side of the filter base B. However, it is also necessary to provide a large-diameter second peripheral surface on the filter medium H side as shown in FIG. 8 depending on the mounting condition of the filter element, which is also included in the present invention. ing. Therefore, the present invention can be applied to various applications including food manufacturing industries such as beer and the like, pharmaceutical industries, general chemical industries, and for liquids and gases.

[Effect of device]

As described above, the attachment mechanism of the filter element of the present invention has a so-called twist lock mechanism, and is configured to seal the engagement outer peripheral surface by at least two seal members. Therefore, the replacement workability is extremely simple, and since there is no liquid pool or air pool, the processing liquid is not contaminated and the cleaning property is good. Further, since the twist lock portion is between the double seals, there is no axial runout of the element, and sufficient mounting strength can be obtained. Therefore, even if a large force is applied, for example, when backwashing, the mounting portion is kept stable.

[Brief description of drawings]

FIG. 1 is a longitudinal half-sectional view of a filter element of the present invention attached to a mounting substrate, and FIGS. 2 (a) and 2 (b) are
FIG. 3 (a) and FIG. 3 (b) are respectively a plan view and a half-piece vertical sectional view of a filter element mounting substrate, and FIG. 4 is a filter element. FIG. 5 and FIG. 8 are half-section vertical cross-sectional views showing another modification of the filter element of the present invention, respectively.
FIG. 6 and FIG. 7 are half-piece vertical cross sections for explaining another method of fitting the seal member, and FIGS. 9 (a) to 9 (c).
[Fig. 3] is a cross-sectional view showing the attachment of a conventional filter element. B: filter base, H: filter medium, E: hole, 2 ...
First peripheral surface, 2a, 6a ... Sealing member, 4 ... Protrusion, 6 ...
… Second peripheral surface, 20 …… Mounting board, 22 …… Inner ring inner surface, 24…
… Notches.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yuichiro Sakai 6-26-1 Jingumae Shibuya-ku, Tokyo Kirin Beer Co., Ltd. (72) Yoshiyuki Kitamura 6-26-1 Jingumae Shibuya-ku, Tokyo Kirin Beer Co., Ltd. (72) Inventor Noboru Hibi 6-26-1, Jingumae Shibuya-ku, Tokyo Kirin Beer Co., Ltd. (72) Inventor Atsushi Yoshida 4-1-1 Ikenomiya, Hirakata, Osaka Japan Stock Inside the Hirakata factory (56) References JP-A-48-29066 (JP, A) JP-A-62-254813 (JP, A) Practical application Sho-63-152611 (JP, U)

Claims (3)

[Scope of utility model registration request] 1. A mounting mechanism for removably mounting a filter element on a substrate mounting portion, wherein the filter element has a protrusion formed on a part of an outer peripheral surface and a protrusion on one side of the protrusion. A filter base having at least a first peripheral surface larger than the protrusion and a second peripheral surface having a smaller diameter on the other side is integrated with a filter medium for capturing and filtering foreign matters and the like, Has a stepped annular inner peripheral surface on which the first peripheral surface and the second peripheral surface of the filter base are fitted via seal members, respectively, and the projection is fitted on the inner peripheral surface to form a filter element. A cutout portion that can be locked is provided, and the projection portion is configured to be disposed between at least two of the seal members, and the filter base portion and the base attachment portion are detachably engaged with each other. And filter eleme Door of the mounting mechanism. 2. The mounting mechanism according to claim 1, wherein the second peripheral surface is provided on the filter medium side. 3. The mounting mechanism according to claim 1, wherein the seal member is fitted on the first peripheral surface and the second peripheral surface, respectively.