CS249983B1 - Segment filter insert with molded jacket - Google Patents

Abstract

Segmented filter element with shaped casing for cylindrical filter element arrangement, consists of stacked filter material, the folds of which are grouped into segments whose filter material is interconnected and which is maintained and protected in the desired position by a suitably shaped casing. This arrangement simplifies the design and assembly of the element and also uses the side surfaces of the segments for filtration.

Description

BACKGROUND OF THE INVENTION The present invention relates to a segmented filter cartridge having a shaped casing which protects and spatially delimits it.

So far, two types of solutions for cylindrical filter cartridges exist according to the required airflow.

For low flow rates, it is a wound or oik-oak method folded into low storage pleated filter paper on a support roll.

For high flow through the filter element, the area of the filter material is increased by increasing the height of the paper fold and separators being inserted between the folds. The present invention also relates to this case.

However, increasing the height of the folds does not allow regular folding of the folds into the shape of a cylinder and the whole formation is unstable in shape. Existing solutions have been solving the stability of cylindrical filters using so-called inclined warehouses, ie warehouses of unequal height.

Folding warehouses of unequal amounts is very demanding and the shortcoming is that the active area. The amount of filter material is considerably smaller than the actual area of the material used. Therefore, there was another solution in which the filter cartridge was assembled into a cylinder from several separate cartridges in the frame itself.

The drawback of all solutions is the complicated construction, the demanding method of sealing the individual cartridges and the greater weight of the filter cartridge.

The proposed filter cartridges of the present invention solve the above drawbacks.

The essence of the segmental filter element according to the invention consists in the fact that it consists of segments composed of several folds of filter material of the same amount, interleaved with separators. The segments thus formed for one filter element are interconnected by a filter material which is either one piece or several pieces bonded together.

The segments interconnected by the filter material are provided on the outside with a shaped casing which defines them spatially. The shaped housing is provided with wedge-shaped projections provided with openings for the passage of air mass through the sides of the segments.

Perforated sheet metal, perforated foils or molina etc. are suitable for the molded sheath. The perforated sheath may be of one piece of material, but also of two or more pieces connected to each other.

The advantages of the solution according to the invention are very simple and lightweight construction and easy mounting of the filter element. The segments consist of only one piece of filter material and have a regular height of the folds. The number of warehouses can be optimally selected.

The side walls of the segments, which in the previous embodiments are obscured by the supporting structure, remain free here and are thus used for the filtration process.

The solutions corresponding to the subject matter of the invention are shown in Figures 1 and 2. The procedure for their preparation is described below.

The solution according to the invention can be advantageously used in biotechnology plants requiring sterile air and in microelectronics for the purification of process gaseous media.

The assembly procedure of the filter cartridge according to the invention is as follows. The zigzag-packed filter material and the interleaved interleaves are inserted into the molded casing to form a fold arranged in regular segments. The pleat is then wrapped around a support cylinder of perforated material. At the point where both ends of the filter material and the molded sheet meet, a gas-tight bonding of the composite and the ends of the molded sheet are performed.

The shape of the fold is secured by the tapes with which the fold is wrapped. This is followed by sealing both faces of the resulting cylinder, for example by means of lids filled with mastic.

Figure 1 is a view of a segmented filter cartridge having a shaped jacket.

Figure 2 shows a detail of the filter element segment and its connection to the secondary segments.

The figures show a construction of an 8-segment filter element with a shaped housing 3. The segments contain the same number of folds of filter material i, between which separators are inserted 2 ·

Separation of the segments and their position is provided by a shaped casing 3 provided with wedge-shaped projections 4. Sealing of the fronts 2 of all segments is ensured by lids 8 which are filled with suitable sealant before being pushed onto the fronts 7.

In order to reinforce the filter element and to facilitate its mounting, the element is secured with cable ties. In the filtration process, the air passes through the holes in the caps 8 and further passes through the holes of the support cylinder 10.

From there, it permeates through the stacked filter material 2 ^, even the sides of the segments 2. The ends of the filter material are joined at site 3, by procedures selected according to the type of filter material.

Claims (3)

Segmented filter element with a shaped casing, characterized in that the filter material is assembled into several segments arranged in a cylinder, for which a space-shaped casing (3) with wedge-shaped projections (4) defines a space. Segment filter element according to claim 1, characterized in that the shaped casing (3) has holes on the wedge-shaped projections (4) for the passage of air through the sides of the segments (9). Segment filter cartridge according to claim 1, characterized in that the filter material is interconnected between the segments.