RU2438754C2 - Self-bearing fluted filtration medium (versions) - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to filtration. Proposed filtration medium comprises filtration material web fluted longitudinally and folded in zigzag manner into a block. Versions of said medium comprises filtration material web fluted longitudinally laterally, spirally twisted or folded web. Multiple dead channels are formed in flutes of filtration material to feed and discharge filtered medium. Ends of channels are stopped by filtration material of folded section material.

EFFECT: reliable filtration and reduced consumption of sealing materials.

8 cl, 28 dwg

Description

The invention relates to devices for filtering various media, consisting of a corrugated (corrugated) filter material.

The filtering element (FE) with a radial feed of the filtered medium (FS) has an underdeveloped filtering surface area, which in shape occupies only the volume of the hollow cylinder. Attempts to increase this area lead either to an increase in the size of the PV or to a denser packing of the corrugated filter material (FM). The packing density of the FM on the outer diameter of the curtain is low, as it is determined by the packing density on the inner diameter. A denser FM installation reduces the area of the FS passage channels and, as a result, increases the hydraulic resistance. The same phenomenon is observed in panel PVs. A PE with a radial feed is usually installed in the filter housing, at the input and output of which the FS significantly changes the direction of movement, which leads to an additional increase in hydraulic resistance. Housing parts carrying FM increase the mass and cost of PV.

Thus, the problem arose of creating a photomultiplier with a sufficiently developed area of the filtering surface installed in the filter housing or the channel of motion of the FS with a minimum change in the direction of motion having a self-supporting FM structure.

A well-known aerosol filter (RF Patent No. 2192916, class B01D 46/52, published November 20, 2002, application No. 2000132697/12, 12/27/2000) made of a smooth FM fabric folded in a zigzag pattern. In the folds of the FM there are metal or polymer wave-like dividers, in the grooves of which the channels of motion of the FS are formed. Each FM fold has a fold that closes the channels on one side. On the other side, these channels are open to the movement of the FS. FE has two groups of folds. The first group is open on the side upstream of the FS and closed on the side downstream. The second group is open and closed in reverse order. A significant drawback of this PV is the need to use wave-like dividers and supporting housing elements with a significant total mass. PV has an underdeveloped filter surface.

Deprived of these drawbacks, the filter element for the air purification filter (RF Patent No. 2066232, class B01D 46/52, published September 10, 1996, application No. 5063258/26, September 18, 1992) is formed by collecting individual relief filter elements in the form of panels and their sealing on the front and side mating areas impregnated with thermoplastic or adhesive material. In corrugations of panels, many channels of two groups are formed. The first group is open on the side of the air inlet to the filter unit and closed on the opposite side of the air outlet. The second group is open and closed in reverse order. The ends of the channels on the sides of the supply and exhaust air are closed by the front mating sections of the panels. As the inventor himself notes, the bulk of filter defects appear in the sealing circuits. Therefore, this design leads to a decrease in filtering reliability due to a possible violation of the tightness of multiple adhesive joints in the front mating areas. Additionally, as a disadvantage, it can be noted that the filter unit is implemented only in a single external parallelepiped shape.

The closest analogue of the variants of the claimed invention is a self-supporting corrugated filter medium (SRFS) used to form a twisted-type PV, block type, "V" -shaped block type (US Patent No. 5,820,646, class B01D 27/06, published October 13, 1998, application No. 199606639371, 04/26/1996). SRFS contains twisted spirally or cut in width and laid in layers in a block strip of a double layer of FM. The strip of the double FM layer consists of a layer of transversely corrugated FM fabric and the covering layer - a smooth FM fabric. In the corrugations of the two-layer strip, a lot of deafs are formed, i.e. open at only one end, parallel channels directed along the flow of the filtered medium. Channels are divided into two groups: open and closed, mutually opposite on opposite sides. One group of FS supply channels has ends open on the inlet side of the contaminated FS located upstream and opposite ends closed by a sealing material in the form of an end chain sealing joint (SCSH) on the outlet side of the cleaned FS located downstream. The second group of FS removal channels has ends open on the output side of the cleaned FS, and opposite ends closed by another SCSH on the input side of the contaminated FS. SRFS on the outer sides contain an impermeable layer with a seal that prevents the flow of the FS bypassing the PV. The vertices of the corrugated layers are attached using sticky buttons from the adhesive to the flat layers, which together with chain seams provides structural rigidity of the corrugated self-supporting filter medium.

As a result of possible deviations in the technology of production and operation of SRFS, there is a likelihood of leakage at the end sections of the channels. Increased consumption of sealing material increases the cost of PV.

In the claimed invention, the task of improving the reliability of filtering SRFS and saving sealing materials is solved by closing the ends of the blind channels of supply / removal of FS by the filtering material itself, forming SRFS.

An FM fabric with periodically changing peaks and troughs can be obtained from a smooth FM fabric by well-known methods of corrugation or corrugation. Since the cross-sectional dimensions of the SRFS channels are small, a few millimeters, the following terms use the general terms of corrugation, corrugated fabric FM.

A variant of the self-supporting corrugated filter medium of the first "Z" -shaped block type (SRFS-1Z) contains a longitudinally grooved FM cloth folded transversely to the web, zigzag ("Z" -shaped) into a block. In the following description, for a longitudinally grooved FM fabric, the name is corrugated filter material of the first type (RFM-1). Inside the fold, in the corrugations of adjacent sides, a series of blind channels are formed, which are closed only at one end by filtering material at the bend of the RFM-1 fold. Opposite ends of the channels are open. Obviously, when zigzag folding, the folds are performed alternately on two opposite sides of the block. Thus, two groups of RFM-1 folds are obtained, in which two groups of blind channels are formed, directed along the PS flow, the ends of which are open and closed mutually opposite on opposite sides of the block. One group of channels performs the function of supplying the contaminated filtered medium to the FM, the other - the removal of the purified filtered medium from the SRFS. The extreme side channels of the SRFS-1Z are sealed along the entire length to prevent the flow of the FS, bypassing the FM. The outer sides of the block contain an impermeable layer, which makes it possible to seal with the PV housing or the common FS motion channel.

SRFS-1Z in the filter element operates as follows. Upstream, on the inlet side of the contaminated FS, the flow enters SRFS-1Z through the open ends of the channels of one group, is cleaned on the FM, forming the walls of the channels, penetrating through it into the cavities of another group of channels, and exits through their open ends on the outlet side of the cleaned FS from SRFS-1Z, located downstream.

Variants of SRFS contain a strip of two-layer corrugated filtering material (DFSF), which is a longitudinal fold of the FM cloth corrugated in the direction transverse to the canvas. For a transversely corrugated cloth FM in the description, the name is a corrugated filter material of the second type (RFM-2). In the internal corrugations of the DPSF, between adjacent sides of the RFM-2 fold, a series of blind channels of the first group are formed, closed at one end of the FM in the place of the longitudinal fold of the fold and open at the opposite end. The sealing composition that fills the external corrugations of both layers of the DPSFM on the side of the open ends of the channels forms two SCCHS.

A variant of a self-supporting corrugated filter medium of the second twisted type (SRFS-2C) contains a DSRFM strip spirally twisted around a central mandrel. The first group of channels in the internal corrugations of the DPSF is described above. Blind channels of the other group, directed along the PS flow, are formed in the outer corrugations between adjacent turns of the DPSF band. Some ends of these channels are closed by the end-chain sealing seams of adjacent turns combined when twisting the DPSFM, forming a single end sealing seam. The other ends are open on the fold side of the DPSF. The ends of the channels in the groups are open and closed mutually opposite, on different sides of SRFS-2C. The extreme channels on the cutting line of the DSRFM strip at the beginning and end of the spiral twist, as well as the areas adjacent to the central mandrel, are sealed to prevent overflow of the contaminated filtered medium, bypassing the FM. The outer surface along the periphery contains an impermeable layer, which provides the ability to seal with the housing of the FE or the common channel of motion of the FS.

A variant of a self-supporting corrugated filter medium of the second block type (SRFS-2B) is distinguished by its external shape, namely, that it contains DSRFM strips cut in width and laid in layers in a block.

The action of SRFS-2C and SRFS-2B is similar to SRFS-1Z.

SRFS options are distinguished by different shapes of folds of the folds of the corrugated FM fabric, dimensions and cross-sectional shape of the channels, the direction of the corrugations of the FM fabric, the use of flat dividers of adjacent layers of corrugated FM, bonding of adjacent layers to increase structural rigidity, the use of a multilayer FM containing a prefilter layer or a special layer pollution absorber, methods of sealing extreme channels.

The technical results provided by the claimed SRFS options are improved filtering reliability, material saving for sealing the ends of the blind channels of supply / removal of FS.

Description of drawings

Figure 1 shows a General view of the transverse folds of the RFM-1 with a straight shape of the plot of the bend.

Figure 2 shows a General view of the RFM-1, folded transversely to the canvas at 90 °.

Figure 3 shows a side view of the folds of the RFM-1 with a straight shape of the fold section.

Figure 4 shows a front view of the variants of the RFM-1 fold with straight and inclined forms of the fold section.

Figure 5 shows a top view of the folds of the RFM-1 with a straight shape of the fold section.

Figure 6 shows a local section of the folds of the RFM-1 with a straight shape of the fold section.

Figure 7 shows a General view of the folds of the RFM-1 with an inclined shape of the plot of the bend.

On Fig shows a top view of the folds of the RFM-1 with an inclined shape of the plot of the bend.

Figure 9 shows a local section of the folds of the RFM-1 with an inclined shape of the bend section.

Figure 10 shows a profile section of the folds of the RFM-1 with an inclined shape of the bend.

Figure 11 shows a General view of the folds of the RFM-1 with a depressed shape of the bend.

On Fig shows a front view of the folds of the RFM-1 with a depressed shape of the plot of the bend.

On Fig shows a top view of the folds of the RFM-1 with a depressed shape of the plot of the bend.

On Fig shows a local section of the folds of the RFM-1 with a depressed shape of the plot of the bend.

On Fig shows a profile section of the folds of the RFM-1 with a depressed shape of the bend.

On Fig shows a General view of the RSFSR-1Z.

On Fig shows a front view of a fragment of the RSFSR-1Z.

On Fig shows a stepped profile section of a fragment of the RSFSR-1Z.

On Fig shows a General view of the folds of the fabric FM with a wide form of corrugations.

On Fig shows a front view of the folds of the fabric FM with a wide form of corrugations.

On Fig shows a front view of the folds of the fabric FM, corrugated at an oblique angle "γ".

On Fig shows a top view of the folds of the fabric FM, corrugated at an oblique angle "γ".

On Fig shows a General view of the RFM-2 and the process of forming the end of the sealing chain seams.

In Fig.24 depicts a General view of two compatible bands DPSF.

On Fig depicts a General view of the RSFSR-2C from the side of the end chain sealing seams.

On Fig depicts a stepwise longitudinal section of a fragment of the RSFSR-2C.

On Fig shows a General view of the RSFSR-2C and the location of the corrugations on the generatrix of the cylinder.

On Fig shows a General view of the RSFSR-2B from the side of the end chain sealing seams.

RFM-1, folded transversely to the 180 ° web, FIG. 1, contains in the corrugations inside the fold, between the adjacent upper 1 and lower 2 sides, a series of blind channels (the cross section of one of them is shown by hatching). The channels at one end, at the fold of the fold, are covered with filter material in the form of sections 3 and 4. At the opposite end, the channels are open.

The transverse fold of a corrugated paper web has a complex fold shape compared to a simple fold of a flat paper web. The RFM-1 fold is made in the form of double folding 90 ° transversely to the canvas along the fold lines applied to the sides of the corrugations.

Figure 2 shows the RFM-1, once folded 90 ° transverse to the canvas along the lines from point 6 to point 5, the segment [5; 6], and from point 5 to point 6 ′, the segment [5; 6 ′], on each corrugation along the entire width of the RFM-1, with the fold of the corrugation vertices 8 around line 55 passing through points 5 at the corrugation vertices and the fold of the corrugation cavities 9 around line 66 passing through points 6 and 6 ′ at the corrugation cavities in the direction of arrow “ a ”. In areas beyond the folds, the corrugation peaks 8 are transformed into grooves of the corrugations 81, and the grooves of corrugations 9 are transformed into the corrugations peaks 91.

After re-folding the RFM-1 90 ° transversely to the web, as shown in FIGS. 3 and 2, along the lines from point 6 to point 7, the segment [6; 7], and from point 7 to point 6 ′, the segment [7; 6 ′], with the folds of the corrugation troughs 81 at point 7 in the direction of the “b” arrow around line 77 and the corrugation vertices 91 at point 6 ′ around line 66 along the entire width of the RFM-1 at each corrugation, the corrugation vertices 91 are converted into corrugation troughs 92 and the corrugation troughs 81 - to the corrugation peaks 82, if you look at the fold of the RFM-1 from below, which corresponds to the initial orientation of the corrugations on the RFM-1 before folding.

As a result of double folding of the RFM-1 at 90 °, the final fold angle will be 180 °. The corrugation tops have two 90 ° bends, the corrugation bottoms have one 180 ° bend in the direction of arrow “c”.

The corrugation cross-section of RFM-1, in Fig. 3 (shown rotated and shaded in the same way as in other drawings), is a triangle 61, 51, 611, in which point 51 lies at the top of the corrugation, and points 61 and 611 are at the troughs. After a single 90 ° folding, the corrugation cross-sectional shape is transformed into a triangle 62; 52; 621, at which point 52 lies on the groove of the corrugation, and points 62 and 621 lie on the peaks. The position of the corrugated web is indicated by a dotted line. After re-folding 90 °, the corrugation cross-sectional shape is transformed into a triangle 63; 53; 631, at which point 53 lies at the top of the corrugation, and points 63 and 631 are at the troughs, if you look at the fold of the RFM-1 from below. Inside the fold, points 61 and 63 on the grooves of the corrugations of the upper 1 and lower 2 sides, respectively, and points 611 and 631 likewise adjoin each other, forming a quadrangle 61 (63) in cross section; 51; 611 (631); 53 corresponding to the shape of the cross section of the channel. Inside the fold along the width of the RFM-1, a number of such channels are formed. On the outer, upper 1 and lower 2, sides of the fold, the cross section of the corrugations has the shape of triangles 51; 61; 511 and 53; 63; 531, respectively, Fig.6.

By analogy with a fold of a flat sheet containing two flat sides having a common fold line, in the following description, the fold sections of the grooved FM fabric before transverse folding by 90 ° and after repeated transverse folding by 90 ° are called the sides of the fold, and the section between them is the fold section folds.

Shown in figures 1 and 3, the fold of the RFM-1 is made with the direct shape of the fold section (PFUS). Figure 4-6 explain its shape. PFUS has characteristic protrusions at points 6 (6 ′) of the bend of the corrugations of the corrugations by 180 °. Surfaces 3 and 4 are concave into the groove and have an “Λ” shaped shape in a plan view, with points 6 and 6 ′ at the edges and a concave point 5 in the middle of the shape. Surfaces 3 and 4, the groove of the corrugations 81, between points 5 and 7, are perpendicular to the planes in which the parallel sides of the RFM-1 fold lie. Corrugation parameters such as crease thickness "h", pitch "t", angle "α" and channel length are selected for specific filtering conditions and may differ for different types of SRFS.

The fold of the fabric of the RFM-1 with an inclined shape of the fold section (NFUS), Figs. 7-9, 10, comprises surfaces 3; 4 and the groove of the corrugations 81, located obliquely, at an angle “β” to the planes in which the sides of the fold of the RFM-1 lie. The characteristic protrusions at points 6 (6 ′) are smaller than in the version with PFUS. Figure 4 frontal views of the folds of the fabric of the RFM-1 for options with PFUS and NFUS match. The inclined shape of the fold section increases the laminarity of the FS flow at the inlet and outlet of the channels.

The fold of RFM-1 with a depressed shape of the bend portion (VFUS) is shown in FIGS. 11-15. VFUS is characterized by the absence of protruding points 6 (6 ′) on the grooves of the corrugations 9 and 92. Point 6, available on the PFUS, on the VFUS is converted into a group of three points 65, 67 and a depressed point 60 deepened into the fold between the corrugations of the corrugations 9 and 92. Lines 84 between points 5 and 7 remain the tops of the corrugations. Each of the surfaces 3 and 4 contained on the PFUS on VFUS is converted into a group of three triangular surfaces 30, 31, 33 and 40, 41, 43, respectively. Surfaces 30 and 40 are V-shaped in plan view with indented points 60 and 60 ′ at the edges and a point 7 in the middle of the form. Surfaces 31 and 41 are adjacent to the corrugation surfaces of the upper side 1 of the crease, and surfaces 33 and 43 are adjacent to the corrugation surfaces of the lower side 2. In general, points 65 and 67 do not meet. This leads to the fact that the cavities of adjacent internal grooves communicate with each other through a gap equal to the distance between points 61 and 63 or 611 and 631.

SRFS-1Z has frontal sides: the inlet side of the contaminated FS located upstream and the opposite, downstream, outlet side of the purified FS; on the periphery - two sides, the upper and lower sides of the bases.

SRFS-1Z, Fig.16, contains RFM-1 with a width of "W", folded transversely to the canvas in a zigzag ("Z" -shaped) form in a block of a given height "H" at a distance "L" between the front sides. In this case, two groups of RFM-1 folds are formed, with fold sections on the front sides of the block, at the entrance and exit of the SRFS-1Z. In the inner corrugations of the folds, a lot of blind channels of two groups are formed, directed along the PS flow, the ends of which are open and closed mutually opposite on opposite sides of the block. Options SRFS-1Z provide for the shapes of the fold sections described above, the same or different on opposite front sides.

The blind channels 11 of the first group have one ends open on the input side of the contaminated FS (shaded arrow) in SRFS-1Z, and the second ends closed FM on the fold sections of the folds of the RFM-1 folds, on the outlet side of the cleaned filtered medium (light arrow) from SRFS- 1Z. The ends of the channels 12 of the second group are closed by the FM sections of the folds of folds of the RFM-1 on the inlet side of the contaminated FS and open on the output side of the cleaned FS.

The flow of contaminated FS, Fig. 18 and 17, enters the SRFS-1Z through the open ends of the channels 11, filling the cavity of the channels of the first group (dirty cavity). Further, the stream, being cleaned on FM 111, which forms the walls of the channels, penetrates into the cavities of the second group of channels 12 (clean cavity) and exits through their open ends on the outlet side of the purified FS.

To give the SRFS-1Z construction rigidity and strength, the sides inside the RFM-1 folds are connected along the corrugation depressions with the help of an adhesive composition “sticky buttons” 13 pointwise or along the entire length. In the SRFS-1Z variants, dividers 14 are additionally installed inside the fold in the form of thin strips, which keep adjacent sides from combining corrugations at their possible relative displacement and, thus, overlapping (collapse) of the channels. The number of elements 13, the number and width of the dividers 14 depend on the length and the required stiffness of the block. To increase the stiffness, the dividers 14 are attached to the layers of the RFM using an adhesive. The contacting grooves of the corrugations inside the crease are taken at the places of installation of the dividers 14. In the installation of the dividers 14, without the formation of grooves of the grooves, a gap is formed between the sides of the crease, which allows the PS to flow from one channel to the adjacent one of the same row (group). This allows you to maintain the health of SRFS-1Z when clogging with large contaminants the open ends of the supply channels of a contaminated FS. In this embodiment, the final fold angle will be slightly less than 180 °, depending on the thickness and installation locations of the dividers. The same effect of the overflow of the FS gives an opening 140 between the grooves of the corrugated FS supply channels that are in contact with a certain depth and at a certain length and do not have separators 14. In the SRFS-1Z variants, separators 141 are installed at the channel end sections, slightly protruding relative to the front sides of the block. In this embodiment, the dividers additionally serve as intermediate supports for axial loads and protect the FM in the folds of folds from possible damage during transportation, installation and operation of the PV.

On Fig-18 shows various options for bundles of folds obtained by applying a hardening, bonding (adhesive) composition to the surface of the FM sections of folds of folds. Point fold ligaments (TCC) 15 between adjacent folds or strip fold ligaments (PSS) 16 fix adjacent folds on the front sides of the block in a predetermined relative location by the block height. MSS 16 can be reinforced with threads, wire, etc. Strip corrugation knitting (RPS) 17 along the block width keeps the corrugations from straightening in the fold section of the fold, fixing the block width, and also protect the FM at bending points 6 (6 ′). The ligamentous ligaments 17 and 16 at the intersection form the ligament nodes (CS) 18. Option CSS 181 with the height of the bonding composition exceeding the sizes of the protrusions of points 6 (6 ′), serve as intermediate supports for axial loads.

The bonding composition at the fold folds further increases the rigidity and strength of the SRFS-1Z structure and makes it possible to increase the laminarity of the flow with the corresponding shape of the ligament surfaces.

The fabric FM with a wide form of longitudinal corrugations (RFM-1sh), Fig.19, 20, has a platform "m" on the peaks and "n" on the hollows of the corrugations. At the tops of the corrugations, in contrast to the RFM-1, not one, but two lines 8 and 8 ′. Similarly, on the corrugation basins, two lines 9 and 9 ′. Area “m” is limited by lines 8 and 8 ′. Area "n" is limited by lines 9 and 9 ′. In the fold section of the fold of the RFM-1sh fold, unlike the RFM-1, point 5 is converted to points 5 and 5 ′, point 6 to points 6 and 6 ′, point 7 to points 7 and 7 ′, the platform “m” is converted to the platform "f", limited by points 5; 5'; 7 ′; 7. The channel cross section has the shape of a hexagon 61 (63); 51; 51 ′; 611 (631); 53 ′; 53 inside the crease.

Folds with a wide form of corrugations are more resistant to combining corrugations in the version without the use of dividers 14 and have smaller FM deformations at points 5; 6; 7.

On Fig and 22 shows the fold of the fabric FM, grooved at an oblique angle "γ" (RFM-1U). The corrugations of the upper and lower sides of the fold are not parallel, but at a mutual angle, intersecting. This design of corrugations increases the self-supporting properties of SRFS-1Z. In this case, without the use of dividers 14, the troughs of the intersecting corrugated sides of the folds are in contact at the contact points within the folds, preventing adjacent sides from overlapping and overlapping the channels. In this case, the channel section is divided into two parts: the upper one in the form of a triangle 61; 51; 611 and the bottom - triangle 63; 53; 631, which, as you move away from the fold fold section, are increasingly diverging from each other in different directions. The gaps between points 63 and 61, 631 and 611 increase. The cavities of adjacent channels in the same row (group) are interconnected, which will also help maintain the efficiency of the FE when clogging with large contaminants the open ends of some of the supply channels of the contaminated FS. The fold RFM-1u can be made with a wide form of corrugations and with various options for bending sections PFUS, NFUS, VFUS, as described above for RFM-1.

To prevent the flow of contaminated FS through the extreme side channels of supply or removal of FS bypassing the FM, they must be sealed along the entire length of the block, Fig. 16, 17. Moreover, for PV constructions with an external seal on an impenetrable outer layer around the periphery of SRFS-1Z, it is sufficient to seal the extreme side channels one of the groups of channels, depending on the location of the external seal. If the external seal is on the upstream side, then it is necessary to seal the extreme lateral channels for supplying contaminated FS, if downstream - the extreme side channels for withdrawing purified FS. In one embodiment of the invention, the sealing is in the form of strips of impermeable layers 192. In another embodiment, along the lateral mating portions 193 impregnated with a thermoplastic or adhesive material. A common impermeable layer 19 on the sides of the block seals the extreme side channels of both groups.

Impermeable layers 19 on the sides and 191 on the base of the block (fragments shown) provide the ability to seal with the housing of the PV or a common channel of movement of the FS. An impermeable layer can be applied in the manufacture of SRFS-1Z or in the assembly of PV.

Variants SRFS-2C and SRFS-2B contain a strip of DSRFM obtained from a web of transversely corrugated FM.

On Fig shows how on RFM-2 applicators 216 serves a sealing material 217, which, filling the grooves of the corrugations, forms two KTSGSh 218 and 219. Such seams can be formed by gluing a profiled tape of impermeable material, the protrusions of which coincide with the grooves of the corrugations FM . The “φ” angle of the RFM-2 corrugations can be equal to 90 ° (transverse corrugation angle) or slightly different from 90 ° (obtuse corrugation angle). For the FM web variant with an obtuse corrugation angle, the name used in the following description is a corrugated filter at an obtuse angle ( RFM-2γ).

The LSRM band is the longitudinally folded RFM-2 around line 66, in the direction of the arrow "e" or "e1", and the LSRM band is the longitudinally folded RFM-2u. In internal corrugations, between adjacent sides of the fold, a series (group) of blind channels 211 is formed, Fig.24, open at one end and closed at the opposite end with filter material of the folds of the fold. The resulting folds are similar to the folds of the RFM-1 (RFM-1u, RFM-1sh) described above.

Applying to the strip DPSFM of the lower layer 221 a strip of DPSFM of the upper layer 222, in the outer corrugations, between adjacent layers of the strips of the DPSFM, a second group of blind channels 212 are formed, closed at only one end, combined by the SCCH 219 and 218 ′, forming a single end sealing joint 220. The ends of the channels of the first and second groups are open and closed mutually opposite on different sides of the SRFS.

To fix the adjacent layers of DPSFM on the surfaces of the SCSH, point ligaments 215 can be created from the fastening (adhesive) composition or material of the SCGS themselves.

SRFS-2C, shown in Fig.25, is obtained by spiral twisting of the strip DSRFM 224, around a central mandrel 223 of a round or other cross-sectional shape, for example oval, giving the corresponding shape of the FE. The center mandrel may be plugged or hollow for mounting the fastener. In this case, a lot of blind channels are formed of two groups of open and closed oppositely on opposite sides of the SRFS-2C. In one group of channels 211 formed in the internal corrugations of the DPSFM bands, the ends shown on the near side are open, and the ends on the opposite side are closed by the FM sections of the bend of the RFM-2 web. In another group of channels 212 formed in the outer corrugations between adjacent coils of the DPSFM, the ends shown on the proximal side are closed aligned when twisting the SCSH, forming a single sealing seam, and the ends on the opposite side are open. SCSS can be formed by applying a sealing material directly when twisting the strip DPSF.

Sealing RSFSR-2C is made between the central mandrel 223 and the strip ДСРФМ 224 and along the cut line of the strip ДСРФМ at the beginning 292 and the end of twisting 293. On the outer surface along the periphery of the SRFS-2С contains an impermeable layer 294 (fragment shown), which allows sealing with the housing PE or a common channel of movement of the FS.

Options SRFS-2C contain dividers in the form of strips 214, 241 between the sides of the fold RFM-2, inside DPSFM, Fig.24, 26, and dividers 242, 243 between the layers DSSFM, “sticky buttons” 213 between the sides of the fold RFM-2 and 231 between the layers of the DPSF. To increase the rigidity, the dividers are installed with an adhesive. The number and installation locations of these elements are determined by the requirements for the strength and stiffness of SRFS-2C.

Option SRFS-2C contains a band DSRFMu. In order to ensure that the channels of the PS motion in corrugations made at an obtuse angle “φ” to the FM sheet do not substantially change their shape due to significant deformation of the FM in arbitrary sections of the corrugations, when the tops / troughs of the corrugations do not lie in a straight line (line “ g "), and along a helix on the generatrix of the cylinder surface (arc" p "), Fig.27, with small deformations of the FM along the entire length of the corrugations. For this purpose, in one of the SRFS-2C variants, RFM-2u was used, made of the initial FM, having small corrugations up to 1 mm deep, the "k" line, oriented along the FM fabric. A similar corrugated FM is offered by many manufacturers of FM. The use of DSRFMu without the use of dividers will not allow to combine corrugations and block the channels of the FS movement. The intersecting corrugations at the points of contact along the tops / troughs can be fastened with “sticky buttons” 213 between the sides of the fold of the RFM-2u and 231 - between the layers of the DSRFMu.

The SRFS-2B variant shown in FIG. 28 is formed by layering in a block of height “H” the strips of the DSFSF, cut along the width “W”, so that the SCCP of adjacent layers are aligned. In this case, similarly to SRFS-2C, a multitude of blind channels of two groups of length "L" are formed, directed along the flow of the filtered medium, open and closed opposite to each other on opposite sides of SRFS-2B. The ends shown on the near side of one group of channels 211 formed in the inner corrugations of the DPSF bands are open. The other ends on the opposite side are closed by FM sections of the folds of the RFM-2 strip. The second group of channels 212 is formed in the outer corrugations between adjacent bands of the DPSF. Their ends, shown on the near side, are closed by the combined SCGS, forming a single end sealing seam when laying strips of DPSFM. The other ends of the channels of the second group are open on the opposite side.

In SRFS-2B, as well as in SRFS-1Z, to prevent the overflow of contaminated FS, bypassing the FM, it is necessary to seal the extreme lateral channels of supply or removal of the FS along the entire length of the block. In one embodiment of the invention, the sealing is in the form of strips of impermeable layers 291. In another embodiment, a common impermeable layer 29 on the sides of the block seals the extreme side channels along the entire side surface of the block. Impermeable layers 29 on the sides and 295 on the base of the block (fragments shown) provide the ability to seal with the housing of the PV or a common channel of movement of the FS. An impermeable layer on the outer surfaces along the periphery can be applied in the manufacture of RSFS-2B, SRFS-2S or during the assembly of PV.

SRFS-2B provides options similar to SRFS-1Z and SRFS-2C. This applies to the use of DSPFMu, dividers 214, 241, 242, 243 and “sticky buttons” 213, 231, openings 140 between the pressed contiguous grooves of the supply channels of the contaminated PS without adjoining the separators, fastening the fold sections of the fold with point bundles of folds 15, strip bundles of folds 16, strip ligaments of corrugations 17, knots of ligaments 18, 181.

The action of SRFS-2C and SRFS-2B is similar to the action of SRFS-1Z. The stream of contaminated FS (shaded arrow), Fig.26, through the open ends on the side upstream, enters the cavity of the channels for supplying the FS (dirty cavity). Next, the FS is cleaned on FM 111, forming the walls of the channels, penetrating into the cavity of another group of channels (clean cavity), and exits through their open ends on the side downstream.

The folds of RFM-2, RFM-2u, as well as RFM-1, RFM-1u, can be made with a wide form of corrugations and with various options for bending sections PFUS, NFUS, VFUS.

SRFS options allow the use of multilayer filtering materials, for example, using layers of pre-filtering material, an absorbing layer such as activated carbon. Materials and the ratio of the thickness of their layers are selected for specific filtering conditions. The prefilter can be installed at the entrance to the PV containing SRFS, or cover it.

On the basis of SRFS-1Z, SRFS-2S and SRFS-2B, using well-known design principles, PVs of various types, purposes and sizes can be created. SRFS allow you to create filter housings without significant changes in the direction of movement of the FS, which reduces the hydraulic resistance of the filtering device. To form an external impermeable layer or a PV housing with external seals, pouring hardening compounds, such as urethanes and similar materials, can be used.

Claims (8)

1. Self-supporting corrugated filter medium of block configuration for use in filter elements, having an upstream side of the entrance of the filtered medium and an opposite, downstream side of the outlet of the purified filtered medium, containing an impermeable outer coating on the peripheral surfaces, corrugated layers of filter cloth, having formed in corrugations extending from the side upstream to the side downstream, many parallel blind channels of two groups, of which the channels of the first the groups are open on the upstream side and closed on the downstream side, the channels of the second group are open on the downstream side and closed on the upstream side, characterized in that a single grooved filter web longitudinally or at some acute angle is folded into a block transversely to the web in a zigzag fashion, the channels are closed at the ends with filter material of the folds of the folds. 2. The self-supporting corrugated filter medium according to claim 1, characterized in that it contains an adhesive composition on the sides of the corrugated filter material inside the folds. 3. The self-supporting corrugated filter medium according to claim 1, characterized in that it contains separator strips between the layers of corrugated filter material. 4. The self-supporting corrugated filter medium according to claim 1, or 2, or 3, characterized in that it contains a hardening composition laid on the filter material of the folds of the folds. 5. Self-supporting corrugated filter medium for use in filter elements, having an upstream side of the inlet of the filtered medium and an opposite, downstream side of the outlet of the cleaned filtered medium, containing an impermeable outer coating on the periphery of the surface, twisted spirally or layered in layers in a strip strip a two-layer filter material having a multitude of parallel deafs formed in the corrugations of the filter material directed from the upstream side to the downstream side x channels of two groups, of which the channels of the first group are open on the side upstream and closed on the side downstream, the channels of the second group are open on the side downstream and closed on the side upstream, the ends of the channels of one group between the layers of the two-layer filtering band material closed with a sealing material filling the corrugation, characterized in that both layers in a two-layer strip are sides of the longitudinal folds of the filter cloth, corrugated transversely or at an angle slightly different from transverse, the ends of another group of channels inside the folds are closed by the filter material of the folds of the fold. 6. The self-supporting corrugated filter medium according to claim 5, characterized in that it contains an adhesive composition on the sides of the folds of the corrugated filter material. 7. The self-supporting corrugated filter medium according to claim 5, characterized in that it contains separator strips between the corrugated filter material. 8. Self-supporting corrugated filter medium according to claim 5, 6 or 7, characterized in that it contains a hardening composition laid on the filter material of the folds of the folds.

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