SK288821B6 - Pocket filter and a clamping profile for attaching the pocket of the filter - Google Patents

Abstract

Pocket filter, comprising support frame construction (1) with at least two filter pockets (2), where the frame construction has profile elements (1a) and side clamping profiles (4) connected in pairs, parallel with corner connectors (3), each filter pocket (2) on the air inlet side in the Clamping bracket (6) has inserted edges, the edges of which are inserted within the frame structure parallel to a pair of profile elements (1a), whereas the free edges of the pocket are fixed accordingly in the profile elements (1a) of the frame structure (1). The clamping fixtures (6) are inserted into the openings (7) of the side clamping profiles (4), which are continuously built along at least one pair of profile elements (1a), the side clamping profiles (4) being between the connecting elements (3) of the profiles (1a ) and positioned within them mutually by supports (15) on the surface of each upper and lower stiffening wall (5b) of the connecting element (3).Taschenfilter, umfassend Tragrahmenkonstruktion (1) mit mindestens zwei Filtertaschen (2), wo die Rahmenkonstruktion über paarweise parallele, mit Eckverbindern (3) verbundene Profilelemente (1a) und Seitenklemmprofile (4) verfügt, wobei jede Filtertasche (2) auf der Lufteintrittsseite in der Klemmhaltung (6) eingesetzte Kanten aufweist, deren Ränder innerhalb der Rahmenkonstruktion parallel zu einem Paar der Profilelemente (1a) eingesetzt sind, die freien Ränder der Tasche werden hingegen entsprechend in den Profilelementen (1a) der Rahmenkonstruktion (1) befestigt. Die Klemmhaltungen (6) werden in den Öffnungen (7) der Seitenklemmprofile (4) eingesetzt , die durchlaufend entlang mindestens eines Paares von Profilelementen (1a) errichtet sind, wobei die Seitenklemmprofile (4) werden zwischen den Verbindungselementen (3) der Profile (1a) eingesetzt und innerhalb deren gegenseitig durch Stützen (15) an der Oberfläche von jeder oberen und unteren Versteifungswand (5b) des Verbindungselementes (3) positioniert. The profile (16) of the clamping bracket for fastening the filter pocket (2) in the frame structure (1a) has grooves (17) and webs (18) distributed along the edge, with the aid of which at least one positioning connection is formed within the clamping bracket, and for the locking connection (19) has locking elements provided with hooks (20) and chambers (21, 22). The locking element (19) and the insert chamber (21) have a shape and dimensions that give them such a shape that the locking element (19) thus formed can be pushed over the insert chamber (21) of the other profile, and its upper part is elastic is shaped in such a way that at least one distancing end (25) of the hook (20) determines the position of a corresponding web (18).

Description

Technical field

The invention relates to a bag filter for removing impurities from the air stream or the gas stream in industrial ventilation devices, in particular for filtering the supply air for gas turbines and turbochargers, as well as for air-conditioning devices. In addition, the invention relates to a clamping profile for making mechanical clamps for attaching a filter bag, which forms an element of the support frame of the bag filter.

Prior art

Air conditioning and ventilation equipment uses filters in which impurities from the flowing air are removed and retained on the surface of the filter or between the filter elements. Fabrics and fleece materials for filtration purposes are made mainly of polymer fibers, glass fibers, cellulose and cotton are also used.

Air filters have various designs, such as a cassette, pocket, compact, or other design, which determines their use. Bag filters, on the other hand, consist of several filter bags, which are fitted as part of a special construction in the supporting frame. The air inlet edges of the filter bags are hermetically clamped between the cooperating frame elements and the ribbed profiles, the edges of which are fixed within the support frame. In the finally mounted state, a stream of air flows through the side-mounted filter bags so that dust and other contaminants settle inside the bags.

The support frames for the bag filters are made of plastic or metal profiles as a combined frame system, as in EP 1883464 B1, or consist of components connected to connecting elements, as in EP2998010 (A2). Separate corner connectors (angle connectors) are also used, such as in WO9837945. In addition, the frames have means for attaching and supporting the filter bags.

The profiles from which the supporting frames and the inner ribbed profiles are formed can have a shape which is completed after the assembly of the two profile elements with a form fit. Such a solution is the subject of patent EP1579904 131. In WO2006083239A1 a plastic frame for a bag filter 30 has been published in which the upper and lower parts are integrated and form the basic structure of the filter. Frames of open profiles are also known, as described in DE4239478C1, which serve to hang strips of fleece material, foil, net or other substances and are used in greenhouses, doorways and the like. The U-shaped metal frames contain a clamping bar which is fitted between the arms of the profile and serves to fasten the edges of the material.

The corner elements for connecting the frame are formed of open or closed profiles, the side surfaces of which have intermediate elements for plug-in connection. EP0610674 (01) discloses a corner joint of a profile frame, for example a window frame, which comprises obliquely cut blank profiles and a corner joint which is fitted with its arms into the inner chambers of the profiles. Between the side surfaces and the inner limiting surfaces of the profiles, there are slot spaces designated by means of spacers.

The essence of the invention

The bag filter according to the invention has a support frame construction with at least two filter bags, the frame construction has a pair of parallel profile elements connected to the corner joints as well as side clamping profiles, each filter bag having adjacent insert edges on the air inlet side in the mechanical clamp. the edges are arranged parallel to the pair of profile elements within the frame structure, the free edges of the pocket, on the other hand, are correspondingly fastened in the profile elements of the frame structure, in addition the mechanical clamping consists of two profiles with a group of positioning and locking / locking elements. The mechanical clamps are mounted in openings of the side clamping profile, which are made continuously along at least one frame of the profile elements, the side clamping profiles being fitted between the connectors of the profile elements and being mutually positioned within them by supports on the surface of each reinforcing wall of the connecting element.

The supports on the surface of each reinforcing wall are made in such a way that the end portions of each support, after assembling the frame with the connecting elements, are located in the area of the adjacent surfaces of the profile element.

In each connecting element, both corner walls have guides with mounted mounting arms.

In each connecting element, the reinforcing walls have a contour which complements the shape of the corner with a form fit.

Each C-shaped profile element has an empty section separated by a partition parallel to the profile web, each section being arranged on both sides with the fastening arms of the adjacent connecting element, the fastening arms having locking bridges corresponding to the profile web and / or crossbar openings.

In each profile element, there are free edges of the filter bags between the crosspiece and the side clamping profile pushing on them.

The openings in the side clamping profiles are located above their lower edge or are designed so that their lower edge is discontinuous.

The clamping profile for attaching the filter bag in the support frame has grooves and ribs arranged at the edge, by means of which at least one positioning lock and a locking lock by means of locking elements provided with hooks are formed within the mechanical clamping holder, in addition it has a profile one smaller and one larger chamber on both sides of the locking element between the grooved arms and the ribs, characterized in that

the locking element and the mounting chamber are designed and dimensioned in such a way that

- in the locking element, the upper part with the hooks is displaced by a path d _x with respect to a line perpendicular to its base and passing through the center O, and a part of the locking element forms a form-fitting support at its base,

- the area of the hooks with dimension Di is greater than the entrance width of the fitting chamber, the fixed end of the hook being spaced d _z from this OB line and below the upper end of the rib,

- the second spacer end of the hook, on the other hand, is at a distance d _g from this line and above the upper end of the groove which gives it such a shape that the locking element thus formed can be pushed through a larger chamber of another profile and its upper part elastically deformed that at least one spacer end of the hook determines the position of the respective rib.

In the locking element, the outer surface of the attached end has a shape that is at least partially configured with a support in the mounting chamber.

In the groove, the stop / abutment surface is inclined to the horizontal surface at an angle B in the range from 40 ° to 80 °, while the angle α between the stop arm and the abutment surface lies in the range from 65 ° to 120 °.

The form-fitting support has an outer surface which is determined by means of concave and convex arcs.

The surface of the hooks has an asymmetrical spongy shape.

The solution according to the invention has a simple and light construction, which allows the use of open C-shaped profiles in the support frame and side clamping profile for attaching filter bags and clamping profiles, using materials of different thicknesses in filters, including fine, little resistant to damage. solid or mixed with glass fibers fitted with substances. The frame structure is also equipped with connecting elements which ensure the stability of the frame, which is additionally reinforced by means of partitions and a hollow section formed. In contrast, the construction of the clamping profile, in particular the rounded surface of the chambers and hooks, increases the space for the filter material to be attached, which reduces its tension in the mechanical clamping. In addition, the possibility of damage to the joint is limited, and fastening is ensured on the flat contact and not on the point contact as before.

Overview of figures in the drawings

The subject matter of the invention is shown in an exemplary embodiment in the drawings, in which:

FIG. 1 is an overall view of a bag filter, FIG. 2 is a section through a portion of a bag filter, FIG. 3 shows the pocket filter in a perspective exploded view, FIG. 4 shows a view of a part of the corner of the frame, FIG. 5 and 6 show in cross section the connection of a profile element with a corner connector, FIG. 7 and 8 show an overall view of a corner connector in constructional variants, fig. 9 shows a rear view of the corner connector of FIG. 7, FIG. 10 shows the attachment of the boundary edges of the filter bag in the clamping profiles, FIG. 11 shows the mechanical clamping in a front view, FIG. 12 shows the profile of the mechanical clamping in an overall view, and FIG. 13 shows the profile of the mechanical clamping in a front view.

Examples of embodiments of the invention

The bag filter shown in the exemplary embodiment of FIG. 1 in general view has a square construction of a support frame 1 made of plastic or metal. Inside the frame there are filter bags 2, the number and size of which are adapted to the requirements of the filtration system. The frame structure 1 consists of a pair of parallel profile elements 1a, which are connected to four corner connectors 3 (angular).

The profile elements 1a are designed as open profiles, have an external C-shaped shape and lateral clamping profiles 4 are fitted within each profile as well as within the length between the connecting elements 3.

Each of the six filter bags 2, as in the example in FIG. 2, on the air inlet side, it has the edges inserted into the adjoining mechanical clamps 6, the other free edges being correspondingly fixed in the frame structure 1, which is explained in the next part of the description. The ends of the mechanical clamps 6 are fitted into the openings 7 of the side clamping profile 4, these openings being made continuously along the pair of profile elements 1a so that the side clamping profiles 4 have a discontinuous lower edge or openings 7 are made above their lower edge as indicated on FIG. 2 - 4. In another pair of profile elements 1a, the side clamping profiles 4 have no openings and form a closing sleeve.

Each profile element 1a has displacement limiters 8 along both free edges on the inner side, which in the longitudinal direction form a support for the edges of the lateral clamping profile 4.

In each connecting element 3, both corner walls 5a have fastening arms 9, which are provided with guides 10. To fit these fastening arms 9, the profile element 1a has an empty section which is separated by a partition 11 parallel to the other profile 12. For easier insertion of the mounting arms, the guides 10 are also inclined.

Each section is arranged on both sides with the fastening arms 9 of the adjoining connecting elements 3, the fastening arms 9 being provided with locking ribs 13, which correspond to the continuous openings 14 of the partition 11 and the profile web 12.

In contrast, the upper and lower reinforcing walls 5b of the connecting element 3 are connected perpendicularly to the corner walls 5a and have a contour which complements the shape of the corner with a form fit. In the exemplary embodiment of the connecting element 3, in FIG. 7 or FIG. 8, this contour is quadratic, but other embodiments are also possible, for example a triangle, a trapezoid or the like, for which the side edges of the profile element 1a must be correspondingly cut to fit.

On the surface of each upper and lower reinforcing wall 5b there are supports 15 for adjusting the position of the side clamping profile 4. The supports 15 are made so that after connecting the frame 1 to the connecting elements 3 there are end portions of each support 15 in the adjoining surface of the profile element. la. The supports are shown in FIG. 7 and FIG. 8 shown in two exemplary embodiments as a one-piece or two-piece angular element on the surface of the reinforcing wall 5b.

As already described, each of the six filter bags 2 on the air inlet side has adjacent fitted edges in the mechanical clamps 6, the free edges, on the other hand, being located in each profile element 1a of the frame 1 between the crosspiece 11a and the lateral clamping profile 4 pushing against it.

The mechanical clamping 6 has a surface which, with the shape of an opening 7, is configured in the side clamping profiles 4, including the clearance, the side clamping profiles in the exemplary embodiment according to FIG. 3 have a rectangular outline. To stably fit the mechanical clamps 6 in the openings 7, the side surface of each profile 16 has grooves 16a for forming a hook connection with the edge of the opening 7. The possibility of displacing the mechanical clamps 6 can also be limited by reducing the clearance between the mechanical clamps and the partition 11 of parallel profile elements 1a. The mechanical clamp 6 consists of two profiles 16, each profile having at its edge fastening arms with grooves 11a and positioning webs 18 for positioning, as well as locking elements 19 with hooks 20 for locking connection.

The groove 17 has a U-shape, the abutment surface 17a is inclined to the horizontal surface at an angle β in the range from 40 ° to 80 °, while the angle α between the stop / abutment arm 17b and the abutment / abutment surface 17a lies in the range from 65 ° to 120 °. The web 18 forms a "web groove" connection with the groove 17 and has a shape that allows the connection. In FIG. 9, the web 18 is shown as an angular bending of the edge of the arm inwards, the magnitude of which is determined in particular by the angle α.

The profile 16 also has a shoulder chamber 21, which is designed as a larger as well as a smaller chamber 22, both chambers being located on both sides of the locking element 19, which in contrast is located between the fastening arms with grooves 17 and ribs 18.

In the locking element 19, the upper part 19a with hooks 20 is shifted by a path d _x with respect to the OB line perpendicular to its base 23 and passing through the center O, which increases the area of the seating chamber 21. The lower part of the locking element 19 at the base 23 has outer surfaces formed of concave and convex arcs and forms its support with the form fit 19b.

The surface of the hooks 20 has an asymmetrical spongy shape with both edges in an arcuate shape, the width of the hook Di being greater than the inlet width Dwl of the chamber 21. In addition, the mounting end 24 of the hook 20 is spaced d _z from the OB line and below the lower end of the rib 18. the outer surface of the mounting end 24 is at least partially configured with a support 19b in the chamber 21.

The second spacer end 25 of the hook 20 is located at a distance d _g from this OB line and above the upper edge of the groove 17.

Said properties of the profile impart to the profile such a shape that the locking element 19 can pass axially or at an angle through the chamber 21 of the second profile, the upper part 19a of which is elastically formed so that the spacer end 25 of the hook determines the position of the respective rib 18.

The profiles forming the mechanical clamp 6 do not have to be identical, but this is desirable from a production economic point of view. To fasten and support the filter bag, it is sufficient if the fastening arms at the 10 edges with grooves and webs form a positionable connection, with locking elements provided with an asymmetrical sponge or similar profile, on the other hand, forming a locking connection with said properties.

List of reference marks support frame construction la profile element filter bag connecting element side clamping profiles

5a the corner wall of the connecting element 3

5b reinforcing wall of the connecting element 3 mechanical clamping of the openings of the side clamping profile displacement limiter in the profile element 1a fastening arms of the connecting element 3 arm guide 9 cross member in the profile element 1 and profile web in the profile element 1a locking ribs of the fastening arms 9 clamping profile in mechanical clamping 6

16a grooves in the profile grooves in the profile 16 of the mechanical clamping 6

17a stop / abutment surface

17b stop arm web in profile 16 mechanical clamping 6 locking element

19a the upper part of the locking element 19

19b support with positive engagement of the locking element 19 hooks of the locking element 19 profile mounting chamber 16 profile chamber 16 lock element base 19 fastening end of the hook 20 spacer end of the hook 20

OB to the base 23 perpendicular line d _x displacement of the upper part of the locking element as far as line OB d is concerned _{from the} distance of the fastening end 24 from the line OB d _{g the} distance of the spacer end 25 from the line OB

Di hook width 20

Dwl inlet chamber width 21 α, β groove angle

Claims (12)

PATENT CLAIMS A bag filter comprising a support frame structure with at least two filter bags, wherein the support frame structure has a pair of parallel profile corner members and side clamping profiles connected to the corner connectors, each filter bag having abutting edges on the air inlet side in the mechanical clamp, the ends are mounted within the frame structure parallel to the pair of profile elements, the free edges of the pocket are in contrast correspondingly fastened in the profile elements of the frame structure, in addition the mechanical clamping consists of two profiles with a group of positioning and locking / locking elements; that the mechanical clamps (6) are fitted in the openings (7) of the side clamping profile (4), which are formed continuously along at least one pair of profile elements (1a), the side clamping profiles (4) being fitted between the connecting elements (3) profiles (1a) and in which frames are mutually positioned by means of supports (15) on the surface k the reinforcing wall (5b) of the connecting element (3). Filter according to Claim 1, characterized in that the supports (15) on the surface of each reinforcing wall (5b) are designed such that the ends of each support, after assembling the frame (1) with the connecting elements (3), are located in area of the adjacent surface of the profile element (1a). Filter according to Claim 1 or 2, characterized in that in each connecting element (3) the two corner walls (5a) have fastening arms (9) with guides (10). Filter according to Claim 1 or 2 or 3, characterized in that in each connecting element (3) the reinforcing walls (5b) have a contour which complements the shape of the corner in shape. Filter according to Claim 1, characterized in that each C-shaped profile element (1a) has an empty section which is separated by a partition (11) parallel to the other profile (12), each section being arranged on both sides. with the fastening arms (9) of the adjacent connecting element (3), the fastening arms (9) having locking bridges (13) which correspond to the openings (14) of the profile web (12) and / or the partition (11). Filter according to Claim 1, characterized in that in each profile element (1a) there are free edges of the filter bags (2) between the crosspiece (11) and the lateral clamping profile (4) which presses on it. Filter according to Claim 1, characterized in that the openings (7) in the side clamping profiles (4) are located above the lower edge or are designed in such a way that their lower edge is discontinuous. 8. Clamping profile of a mechanical clamp for attaching a filter bag in a frame structure having grooves and ribs spaced at the edge, by means of which at least one positioning connection is formed within the mechanical clamping and has locking elements provided with hooks for the locking connection, except the profile has chambers on both sides of the locking element between the outer fastening arms with grooves and ribs, characterized in that the locking element (19) and the shoulder chamber (21) are formed and dimensioned so that in the locking element (19) the upper the part (19a) with hooks (29) displaced by a path d _x with respect to the line OB perpendicular to its base (23) and passing through the center O, and the part of the locking element (19) on the base (23) forms its form-fitting support ( 19b), the area of the hook with dimension Di is larger than the inlet width Dwl of the shoulder chamber (21), the fixed end (24) of the hook (20) being spaced d _z from this line OB and below the upper end of the rib (18), second spacer k the end (25) of the hook (20), on the other hand, is at a distance d _g from this line and above the upper end of the groove (17) which lends them such a shape that the locking element (19) thus formed can be pushed through the mounting chamber by pushing (21) of a further profile and the upper part of which is elastically formed so that at least one spacer end (25) of the hook (20) determines the position of the respective rib (18). Profile according to Claim 8, characterized in that in the locking element (19) the outer surface of the fastened end (24) has a shape which is arranged at least partially with the form-fitting support (19a) in a shoulder chamber (21). Profile according to Claim 8, characterized in that in the grooves (17) the abutment surface (17a) is inclined to the horizontal surface by an angle β in the range from 40 ° to 80 °, while the angle α between the stop arm (17b) and the bearing surface (17a) lies in the range from 65 ° to 120 °. Profile according to Claim 8, characterized in that the form-fitting support (19a) has an outer surface which is defined by a concave and a convex arc. Profile according to claim 8, characterized in that the surface of the hooks (20) has an asymmetrical spongy shape. 6 drawings