DE2019329A1 - Filter spout and perforated plate for filter apparatus - Google Patents

Description

Pall 2497 VP / So / Pi

2019328

Wilhelm Schuler Filtertechnik GmbH.

6719 Eisenberg / Pfalz , Tiefenthaler Str. 16

Filter nozzle and perforated plate for filter apparatus

The invention relates to a filter spout made of ceramic, metal or plastic, for use from the clean side in filter apparatus and a perforated plate to hold the filter grommet.

The filter nozzles that have been used so far are filter tubes closed on one side, which have a Have covenant. The filter nozzles are inserted into the holes in the perforated plate from the clean side and with the help of Compression springs, tensioned by means of an additional perforated plate or by means of clamping irons of various designs on the perforated plate attached. These filter sleeves can be made of ceramic, metal, plastic or some other suitable material. Here the endangered cross-section is at the transition from the collar to the actual filter shaft. Especially about the strength To increase the number of ceramic filter spouts, the collar can be reinforced or a solid, solid collar can be arranged on the porous filter candle or a metal reinforcement can be used so that a filter tube by means of a rod or a metal tube between a loose flange and a fixed head with collar is clamped. Such fastenings of filter spouts and filter tubes mean but a considerable increase in the price and, moreover, the use of several materials limits the application possibilities such a filter in various chemical processes.

Compared to the known, the invention consists in that the upper insert end of the filter spouts is externally frustoconical is conical and the bores of the perforated plate a

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for receiving and guiding the insertion end of the filter grommets have appropriately designed inner contour.

This embodiment according to the invention achieves that the tensile forces occurring directly on the collar, which are always dangerous, especially with ceramic material, distributed over a larger area through a long conical transition and thus greatly mitigated. aside from that the coloring stresses that are present at the transition from the collar to the actual filter shaft are eliminated. By the filter nozzle is pulled into the cone by its own weight. This will only make the conical head of the filter spout loaded by compressive forces.

It is advantageous to the inner cone of the holes in the perforated plate and to give the outer cone of the filter spouts the same slope.

The slopes of the outer cones of the insert ends of the filter spouts and the inner cones of the holes in the perforated plate can also be designed so that they differ from one another.

It can also be advantageous between the outer cone of the filter spouts and the inner cone of the holes in the perforated plate to arrange a seal. This can be done in a simple manner that the filter sleeve over the outer cone a correspondingly shaped profile seal is pulled.

To form a type of labyrinth seal, the holes in the perforated plate can be stepped by adding a or a plurality of steps are obtained, in such a way that the step edges correspond to the kne slope of the insert end of the filter spouts are arranged lying to one another.

Advantageously, one of the stages can be correspondingly profiled seal be placed.

A further advantageous development of the external profile of the

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Insert end of the filter spouts can be that this is convex.

The arrangement of the outer profile of the insert end of the ■ filter grommets can be done in that this is sintered on from ceramic or other materials.

The invention is illustrated, for example, in the drawing, namely shows:

Fig. 1 shows a perforated plate with inserted filter grommet, in where the gradients of the inner cone of the hole in the perforated plate and the outer cone are the same,

FIG. 2 shows an arrangement similar to the embodiment according to FIG. 1 with a sealing insert,

Fig. 3 and

Fig. 4 application orders in which the cones of the bore of the perforated plate and the filter spout have different slopes,

Fig. 5 application orders with a stepped design of the Hole in the perforated plate and

Fig. 6 order of use with a stepped design of the hole in the perforated plate with an inserted seal.

The perforated plate 1 for a filter apparatus, which separates the leg side from the sludge side, is equipped with the bores 2 for use of the filter grommets 3. Here are the holes 2 of the lodi plate 1 has a conical design. Those to be used in these holes 2 Filter grommets 3 are at their insert end 4 * outside

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Truncated conical design, the slopes the outer cone 5 and the inner cone 6 of the holes 2 the perforated plate 1 are the same. Da3 plague the filter spouts 3 in the bores 2. of the perforated plate 1 takes place, for example, in a known manner by means of clamping iron 7 (Fig. 1).

To ensure a good seal between the inner cone 6 of the To achieve holes 2 in the perforated plate 1 and the outer cone 5 of the filter spouts 3, the outer cone 5 the filter spouts 3 pulled a correspondingly shaped profile seal 8 prior to their use (Fig. 2).

The slopes of the outer cones 5 of the insert ends A of the filter sleeves 3 can be designed so that they differ from one another (Fig. 3 and A).

The holes are used to form a kind of labyrinth seal 2 of the perforated plate 1 is provided with a step 9. The edge of the step 9 is arranged so that this together with the The upper edge of the hole 11 forms a line which runs in accordance with the slope of the outer cone 5 of the filter spouts 3 (Fig. 5).

To increase the sealing effect, a seal 12, z. B. in an annular configuration, arranged (Fig. 6).

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Claims (8)

Claim it Mj Filtertille made of ceramic, metal or plastic for Use from the clean side in filter apparatus and a perforated plate to accommodate the filter nozzle, thereby characterized in that the upper Einsatzen.de (4) of the filter troughs (3) has a truncated conical shape on the outside is and the bores (2) of the perforated plate (1) one for receiving and guiding the insert end (4) of the Filtertiillen (3) have appropriately designed inner contour. 2. Filter spout and perforated plate according to claim 1, characterized in that that the inner cone (6) of the bores (2) of the perforated plate (1) one of the slope of the outer cone (5) the filter spout (3) has a corresponding slope (Fig. 1). 3 filter spout and perforated plate according to claim 1, characterized in that that the slopes of the outer cones (5) of the insert ends (4) of the filter spouts (3) and the inner cones (6) of the bores (2) of the perforated plate (1) differ from each other (Fig. 3 and 4) 4. Filter spout and perforated plate according to claims 1 to 3t, characterized in that between the outer cone (5) of the filter spouts (3) and the inner cone (6) of the bores Is inserted a profiled seal (8) of the perforated plate (1) (2) (Fig.2). 5- filter spout and perforated plate according to claims 1 to 4 »characterized in that the bores (2) of the perforated plate (1) have steps (9) and the edges of the steps (9) have the conical slope of the insert end (4) of the filter spouts (3) are corresponding to each other (Fig. 5). 6 · filter spout and perforated plate according to claim 5 »thereby 109845/0816 indicates that a seal (12) is placed on one of the steps (9) (Fig. 6). 7 Filter nozzle according to one or more of the previous * - the claims, characterized in that the outer profile of the insert end (4) of the filter spouts (3) is convex. 8. Filter spout according to one or more of the preceding claims, characterized in that the outer profile of the insert end (4) of the filter sleeve (3) made of ceramic or other materials is sintered on. 109845/0816