RU2732749C1 - Slot-type filter - Google Patents

Abstract

FIELD: physics.SUBSTANCE: invention relates to liquid media filtration devices and can be used for preliminary purification of liquid media, for example water, milk and mechanical impurities. Slot-type filter comprises a tubular body on which there is a perforation in the form of transverse slot-type holes arranged along the axis in parallel rows and made on the laser cutting machine with narrowing from the outer surface inside, wherein on the outer surface the size of holes is 250 mcm, on the inner surface - 200 mcm.EFFECT: technical result of this invention is longer service life of filter due to rigidity of frame, preventing deformation and destruction of filter with increase in pressure drop during filtration, as well as simplified design.1 cl, 5 dwg

Description

The invention relates to devices for filtering liquid media and can be used for preliminary purification of liquid media, for example water, milk from mechanical impurities.

Known slotted filter (RF patent No. 2140316, class B01D 29/44, publ. 27.10.1999), containing a tubular body, which is perforated in the form of transverse slot-like holes located along the axis in parallel rows. However, the filter has a complex and material-intensive design and does not fully adjust the gap, since the gap is not adjustable in the corner zones of the slots.

The technical problem is the elimination of the noted shortcomings. The technical result consists in increasing the service life of the filter due to the rigidity of the frame, which prevents deformation and destruction of the filter with an increase in the pressure drop during the filtration process, reducing operating costs by simplifying the design.

The problem is solved, and the technical result is ensured by the fact that the slotted filter contains a tubular body, on which perforations are made in the form of transverse slot-like holes arranged along the axis in parallel rows and made on a laser cutting machine with a narrowing from the outer surface to the inside, and on the outer surface the size of the holes is 250 microns, on the inner - 200 microns. Hole arrangement can be in-line or staggered

FIG. 1 shows a general view of a slotted filter; in fig. 2 - profile of the filter holes; in fig. 3 - the location of the slotted holes; in fig. 4 - accumulation of precipitation; in fig. 5 is a filter washing scheme.

The slotted filter contains a stainless tubular body, on which perforations are made in the form of narrow transverse slot-like holes located along the axis in parallel rows and having a narrowing from the outer surface to the inside. The slotted filter is installed in the housing between two rubber seals preventing the penetration of unfiltered liquid into the internal cavity of the slotted filter. The arrangement of the holes can be made in-line (Fig. 1) or spaced out (Fig. 3). The holes in the filter are made on a laser cutting machine and have a size of 250 microns on the outer surface of the housing and 200 microns on the inner surface. Flushing is carried out in the reverse way. The presence of a constriction makes it possible to retain particles with a size of 200 microns and above. During the filtration process, the trapped particles begin to play the role of additional filter elements.

Claims (2)

1. A slot filter containing a tubular body on which perforations are made in the form of transverse slot-like holes arranged along the axis in parallel rows, characterized in that the holes are made on a laser cutting machine with a narrowing from the outer surface to the inside, and on the outer surface the size of the holes is 250 microns, on the inner - 200 microns. 2. A slotted filter according to claim 1, characterized in that the arrangement of the holes is in-line or interdigitated.

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