RU2515893C2 - Aperture filter element - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to fluid filters and can be used in various industries for efficient cleaning of low-friction fluids, for example, water, kerosene, acetone, diesel fuel, etc, of mechanical impurities. Aperture filter element comprises set of impermeable plates secured at supports to make the variable-width channels at displacement of said supports. Said plates are made of metal and feature rectangular cross-section. Said supports are made of flexible metal bars spaced from each other at the distance corresponding to plate length and welded or soldered thereto. Note here that said bars are bent in parallel towards plates secured thereto to make channels diverging outwards between side surfaces of adjacent plates while plate ends opposite secured plate ends to make aperture filter surface.

EFFECT: new aperture filter of simpler design, higher reliability and efficiency.

3 cl, 1 dwg

Description

The invention relates to a device for filtering liquid media and can be used in various industries where effective cleaning of low-viscosity liquid media, such as water, kerosene, gasoline, acetone, diesel fuel and other similar media from mechanical impurities is required.

A device for cleaning liquid containing filter plates with holes made in the form of comb sections that enter one into the other, one of which is movable and connected to a reciprocating drive (author's certificate of the USSR No. 339299, class B015D 25/12, publ. 1972).

A disadvantage of the known device is its small effective filtering surface.

Known slot filter, including a filter element from fixed plates (US patent No. 3563388, CL 210-457, publ. 03.02.71).

A disadvantage of the known device is the difficulty of adjusting the size of the filter gap, which does not allow to obtain a given degree of purification of the liquid with solid inclusions of various sizes without disassembling the entire filter. In addition, the filter has a small total area of the slots, and therefore, insufficient performance. An increase in the total area of the slots of such a filter entails a significant increase in its dimensions.

Closest to the claimed technical essence and the achieved result is the filter element of the slit filter described in the author's certificate of the USSR No. 700168, cl. B01D 25/16, publ. 11/30/79 (prototype).

The slit filter element includes a set of impermeable plates pairwise connected by springs and pivotally mounted on a support associated with a drive for moving it, and spacer wedges are placed between pairwise connected plates to form variable width channels between adjacent pairs of plates.

The disadvantages of the known device are:

- design complexity;

- unreliability of the structure due to the possible failure of the articulated joints of the plates with the support under the influence of abrasive particles of the filtered media;

- insufficiently high filter performance due to the small usable area of the filter surface.

An object of the invention is the creation of a new filter element of the slit filter with a simpler design, high reliability and high performance.

The technical problem is solved when creating the design of the filter element of the slit filter, including a set of impermeable plates fixed to the supports and configured to form channels of variable width when moving the supports, in which according to the invention the plates are made of metal and have a rectangular cross-section and the supports are made of flexible metal rods located at a distance from each other, corresponding to the length of the plates placed on them at given distances, one from and fixed by welding or soldering, the rods being parallel curved towards the plates fixed to them with the formation of channels expanding outward between the side surfaces of adjacent plates, the ends of the plates opposite the fixed form a filtering slotted surface, and the value of the bending of the bars corresponds to a certain width each slit of the filter surface.

In such a filter element of the slit filter, the filter slit surface may be closed or open.

In the claimed design of the filter element of the slotted filter:

- the design of the supports and the filtering surface is characterized by a simpler solution, and they include fewer components;

- making connections of plates with supports by welding or soldering increases the reliability of the device;

- the creation of a filtering surface with slots, each of which is formed by the ends of two plates (rather than two pairs of plates), involves obtaining a more developed surface, which is characterized by an increased total area of the slots of the filtering surface, predetermining a higher performance of such a filter element of the slit filter.

A comparative analysis of the claimed object and the prototype reveals the presence of distinctive features of the inventive filter element of the slotted filter in comparison with the closest analogue, which suggests that the proposed solution meets the criteria of the invention of "novelty."

The presence of distinctive features makes it possible to obtain a positive effect, expressed in the creation of a new filter element of the slit filter, which has a simpler design, higher reliability and higher performance.

Since when examining the subject of the invention in patent and scientific literature, no solutions were found containing the features of the claimed invention that are different from the prototype, it should be concluded that the claimed solution meets the criterion of materiality of differences.

The assignment of the claimed object to devices for filtering liquid media used in various industries ensures compliance with its criterion ^w industrial applicability. "

The inventive filter element of the slit filter is shown in the drawing, which shows its General view in a perspective view.

The filter element of the slit filter includes a set of impermeable plates 1 mounted on supports and configured to form channels 2 of variable width when moving the supports, while the plates 1 are made of metal and have a rectangular shape in cross section, and the supports are made of flexible metal rods 3, 4 located at a distance from each other, corresponding to the length of the plates 1, placed on them at predetermined distances from one another and fixed by welding or soldering, and the rods 3, 4 are made pa bent parallel to the side of the fixed plates 1 with the formation between the side surfaces of adjacent plates 1 expanding outward channels 2, while the ends 5 of the plates 1, opposite the fixed ends 6, form a slit filter surface.

In the manufacture of the prototype of the filter element of the slit filter, the following plate sizes were adopted:

length - up to 500 mm, height - up to 100 mm, thickness - 1-5 mm, the distance between the supporting rods - up to 400 mm.

The plates are fastened to the rods by welding or soldering or by any other method that excludes their displacement.

During operation of the filter element of the slotted filter, the filtered liquid medium is fed into the internal cavity bounded by the slotted filtering surface with slots formed by the ends of the 5 plates 1. This liquid medium is filtered at the inlets in the slots and the filtered one enters the channels 2, expanding outward. The width of the slots is regulated by the values of the bending of the support rods 3, 4 and can be configured to filter the liquid medium with solid inclusions of particles of a certain size in each individual case.

A simpler design, higher reliability and higher performance determine the advantages of the inventive filter element of the slotted filter in comparison with the prototype.

Claims (3)

1. The filter element of the slit filter, including a set of impermeable plates fixed to the supports and configured to form channels of variable width when moving the supports, characterized in that the plates are made of metal and have a rectangular shape in cross section, and the supports are made of flexible metal rods located at a distance from each other, corresponding to the length of the plates placed on them at predetermined distances from each other and secured by welding or soldering, Nena parallel curved toward the plate fixed to them to form between the side surfaces of adjacent plates, expanding outwardly channels, the ends of the plates opposite fixed to form a slit filter surface. 2. The filter element of the slotted filter according to claim 1, characterized in that the filtering slotted surface is closed. 3. The filter element of the slotted filter according to claim 1, characterized in that the filtering slotted surface is made open.

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