JPS5842004Y2 - radial filter leaflet - Google Patents

Description

[Detailed description of the invention] The present invention makes it possible to change the filtration area of a radiation-type filter body used in a filter without changing the shape of each filter leaf constituting the filter body. Regarding the structure that was created.

As for this type of actiform filter body, the technique disclosed in Japanese Utility Model Publication No. 1984-5984, invented by the inventor of the present application, is known.

That is, in the known technique, as shown in FIGS. 1 and 2, each filter leaf a molded from synthetic resin is formed at one end edge of a cross-sectional model extending in the vertical direction. are arranged in an annular manner with their both sides adjacent to each other in close contact with the entire surface, thereby forming a vertical tubular liquid collection space C at the center of this assembly, and forming the annular collection. A recess d is formed at both the upper and lower ends of the bone part, and a collective retaining ring e is fitted into the recess d to maintain the shape of the radial filter leaf, and the outer periphery of each filter leaf a is Although the filter cloth F is provided on the surface in a meandering manner, the filtering area is constant in this configuration.

By the way, if we consider the effects of increasing or decreasing the filtration area on the filtration operation, it will naturally change the filtration speed, filtration pressure, filtration accuracy, and clogging cycle. The selection of the filtration area is considered important, and those skilled in the art pay particular attention to this point, determine it through repeated tests, and aim to improve filtration efficiency through more rational filtration operations. However, it is often the case that the filtration conditions differ from the initial plan compared to other processes, and in these cases it is wise to take into account the initial selection conditions when determining the filtration area. The reality is that we have no choice but to deal with this problem by increasing or decreasing the filtration area based on the results of actual tests.

Therefore, when increasing or decreasing the filtration area, using filter bodies of completely different sizes means that filter bodies of various sizes must be manufactured and stored in advance,
Its proper implementation is extremely difficult.

The present invention focuses on the above-mentioned points, and makes it possible to change the filtration area using the conventionally used filter leaves described above without changing the basic form of the filter body to a larger width. It is.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 3 shows a basic type in which there are 18 filter leaves a constituting the filter body A, and in this case, the unilateral edge of the filter leaf a is Both side surfaces b1 of the bone part of the cross-sectional model formed in the cross-sectional model and extending in the longitudinal direction are in full contact between the adjacent bone parts s and b, and the bone parts are in contact with each other at both the upper and lower ends of the filter leaf a. A collection holding ring e is fitted into a recess d provided in connection with the assembly holding ring e to collect and fix the assembly.

The retaining ring e is integrally provided with a detachable flange e1.

In the above configuration, when it becomes necessary to increase the filtration area, the collection holding ring e is taken out and a desired number of filter leaves a are added.

FIG. 4 shows a case in which there are 22 filter leaves a constituting the filter body A'. Since the present invention is constructed as described above so that b is in contact with
It has the feature that the filtration area can be easily changed as necessary without drastically changing the basic form of the filter body in use.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of the central part of a conventional radiation type filter body, Fig. 2 is a cross-sectional view taken along the line II-II of the same as above, and Fig. 3 is a sectional view of each filter leaf a.
, and a collective retaining ring e′ having a larger diameter and equal wall thickness than the collective retaining ring e of the basic type is fitted into the recess d,
The inner and outer peripheral surfaces of the recess d are the inner and outer surfaces d1. d2 to maintain its focused shape. On the other hand, if it becomes necessary to reduce the filtration area, a desired number of filter leaves a are removed. FIG. 5 shows a case where there are 14 filter leaves a constituting the filter body A″, and in this case, the bone parts adjoining each other with the inner end b3 on both sides b0 of the bone part are shown in FIG. Each filter leaf a is arranged so that they are in contact with each other, and a collective retaining ring e'' having a diameter smaller than that of the basic type collective retaining ring e and having an equal wall thickness is fitted into the recess, and its inner and outer circumferential surfaces are the inner and outer surfaces d1 of the recess d.
d2 to maintain its focused shape. The details of the increase/decrease in the filtration area, the dimensions of the gathering retaining ring, etc. on each side are as follows. Fig. 4 is a plan view of a part of the filter body before the area is changed, Figure 4 is a plan view of a part of the filter body when the filtration area is increased, and Figure 5 is a plan view of a part of the filter body when the filtration area is decreased. It is a partial plan view. a... filter leaflet, b... bony part, bl...
...both sides, b2...outer end, b3...
...Inner end, e'e''... Collective retaining ring.

Claims (1)

[Scope of utility model registration request] A filter leaf that has a longitudinally extending cross-sectional model bone on one end edge, and that can be brought into contact with the side surfaces of adjacent ones without engaging them to form an annular aggregate bone. In a radial type filter body in which a plurality of filter leaves are bundled by fitting collective retaining rings into recesses provided at both upper and lower ends of the filter leaves, a plurality of collective retaining rings with different diameters are used alternatively. The filter leaves are brought into contact with each other with one of the inner and outer ends of both side surfaces of the bone portion, and the inner and outer circumferential portions of the plurality of collecting retaining rings are brought into close contact with the inner and outer surfaces of the recess for convergence. The radial filter body is formed in this way.