Traitement en cours

Veuillez attendre...

Paramétrages

Paramétrages

Aller à Demande

1. WO2007103335 - APPAREIL ET PROCEDE DE FILTRATION AVEC INDEXAGE ET ETANCHEITE SIMPLIFIES DE LA BANDE FILTRANTE

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS
1. A filter apparatus including:
a tank having an interior space adapted to receive and contain a liquid containing solids to be filtered out;
a closed loop filter belt having a segment extending within said tank space; a filter belt support located within said tank interior space and on which said segment of said filter belt is supported, said filter belt support having openings allowing liquid passing through said filter belt to be filtered to pass into a separate collection space in said tank;
a pump drawing filtered liquid out of said collection space for reuse;
said filter belt having a return segment connected to said one segment to allow periodic indexing movement thereof to bring successive sections onto said filter belt support and advance other sections out of said interior space to allow discharge of filtered solids deposited on said filter belt;
said filter belt passing around a filter belt support at either end to allow circulation of said filter belt back into said tank interior space by successive indexing movements of said filter belt;
said filter belt having a series of spaced apart parallel bars mounted thereto along the length thereof, each filter bar extending across said filter belt;
an indexing drive mechanism periodically acting on said filter belt by successively engaging each of said bars and advancing said engaged drive-flight bar and thereby said closed loop filter belt to cause said indexing movement of said filter belt. 2. The apparatus according to claim 1 wherein said indexing drive mechanism includes at least one extendible member carrying an associated engagement element into and out of engagement with said one of said filter belt drive-flight bar during each indexing drive mechanism operation.
3. The apparatus according to claim 2 wherein said element comprises a block having a stepped shape engaging a drive-flight bar during each indexing operation. 4. The apparatus according to claim 2 wherein said indexing drive mechanism includes a pivot member mounted to pivot about an axis of one of said filter belt rotary supports, said extendible member carried on said pivot member spaced from said filter belt passing around said rotary support and carrying said engagement element into engagement with a drive-flight bar on said one rotary support, and further including an actuator for pivoting said pivot member from a start position to an advanced position to produce periodic indexing movement of said filter belt.
5. The apparatus according to claim 2 wherein two extendible members are provided each carrying an associated engagement element, each element aligned with a respective end of each drive-flight bar engaged thereby.
6. The apparatus according to claim 5 wherein each of said drive-flight bar ends is spaced inwardly from a respective outer edge of said filter belt.
7. The apparatus according to claim 6 wherein each of said drive-flight bars 'are mounted to said filter belt by a pocket attached to an outer surface of said filter belt, said drive-flight bars each slidably received in an associated pocket with an end protrufiiinq from a respective side of an associated pocket.
8. The filter apparatus according to claim 1 wherein two indexing mechanisms are included, each indexing mechanism engaging a respective end portion of eachtof said drive-flight bars.
9. The filter apparatus according to claim 6 wherein said drive-flight bars are spaced apart a distance of approximately 8 inches.
10. The filter apparatus according to claim 6 wherein a pair of guide surfaces extend along the path of said filter belt confining said ends of said drive-flight bars to maintain the position of said one segment of said filter belt in said tank overlying said filter belt support. 11. The filter apparatus according to claim 8 wherein two pivot members are included, each associated with an index mechanism, an actuator pivoting said pivot members from a start position to cause indexing of said filter belt, and further including a pair of elongated seals extending along a respective said guide surface extending over a respective side edge of said filter belt said seals each comprising a sealed collapsible hose partially filled with a liquid; said pivot members each carrying a seal compressing member compressing a respective sealed hose when in said initial position and releasing said hose when said pivot member is actuated by moving said seal compressing member away from said respective hose.
12. A filter belt comprising:
a strip of woven filter fabric having opposite ends connected together to form an endless loop;
a series of elongated parallel pockets affixed to outer surface of said endless loop, each pocket extending across the width of said fabric strip and having opposite ends each spaced in from a respective side edge of said strip, said pockets each sized to receive and retain a rectangular bar.
13. The filter belt according to claim 13 wherein said pockets are spaced apart a distance of approximately 8 inches.
14. The filter belt according to claim 12 further including an elongated bar contained in each pocket on said belt, said bars each having a pair of opposite ends each end extending out of said pocket and over adjacent parts of said fabric strip towards a respective end of said strip but terminating short of a respective edge of said fabric strip. 15. The filter belt according to claim 10 wherein said bars have sides approximately VA" to 1 VT wide.
16. The filter belt according to claim 15 wherein said bars are of plastic.
17. The filter belt according to claim 13 wherein said fabric strip has a border along each side thereof impregnated with a plastic material.
18. The filter belt according to claim 17 wherein said plastic material is polyurethane. 19. A filter apparatus including:
a tank having an interior space adapted to receive and contain a liquid containing solids to be filtered out;
a closed loop filter belt having a segment disposed to extend within said tank interior space;
filter belt support located within said tank interior space and over which said segment of said filter belt extends, said filter belt support having openings allowing liquid passing through said belt to be filtered to pass into a collection space in said tank;
a pump drawing filtered liquid out of said collection space;
said filter belt having a return segment connected to said one segment to allow periodic indexing movement to bring successive sections thereof onto said filter support and advance other sections thereof out of said interior space to allow discharge of filtered solids deposited on said filter belt during filtering;
said filter belt passing around a rotary filter belt supports at each end of said tank to allow return of said filter belt back into said tank;
an elongated seal extending along a support surface extending along a respective side edge of said filter belt on which the edges of said belt segment passes when said filter belt is indexed, said seals each comprising a sealed collapsible hose partially filled with a liquid;
a seal compressing member compressing each sealed hose when said filter belt is at rest and releasing said hose when said filter belt is indexed by moving said seal compressing member away from said respective hose.
20. A filter apparatus including:
a tank having an interior space adapted to receive and contain a liquid containing solids to be filtered out;
a closed loop filter belt disposed to have a segment thereof extend within said interior space; and
a filter belt support within said tank and over which said segment of said filter belt extends, said filter belt support comprising an array of plastic pieces resting on a solid plate, said pieces having openings allowing liquid passing through said belt to be filtered to pass through said tiles into a collection space in said tank;
a pump drawing filtered liquid out of said collection space for reuse;
said filter belt having a return segment connected to said one segment to allow periodic indexing movement to bring successive sections onto said filter support and advance other sections out of said interior space to allow discharge of filtered solids on said filter belt;
said filter belt passing around a rotary filter belt support at either end of said tank to allow movement of said filter belt back into said tank interior space by periodic incremental indexing movement thereof;
an indexing drive mechanism periodically advancing said filter belt incrementally to produce said indexing movement of said filter belt.
21. The filter apparatus according to claim 18 wherein said pieces have lengthwise openings allowing filtered liquids to flow through and along said pieces to said collection space.
22. The filter apparatus according to claim 21 wherein said solid plate is curved in shape across the tank and said pieces are bendable to conform to said curved solid plate. 23. A method of indexing a closed loop filter belt extending within a filter tank and passing around a pair rotary supports to be able to recirculate around said rotary supports by periodic indexing movement comprising:
mounting a series of equally spaced bars to an outer surface of said filter belt;
successively engaging each of said bars with an engagement element as with each successive bar in position on one of said rotary supports; and
swinging said engagement element about an axis aligned with an axis of said one rotary support to advance said engaged bar around said axis and thereby also pull said filter belt to index said filter belt by advancing the same around said rotary support axis a corresponding distance.
24. The method according to claim 23 wherein said element is mounted to a pivot plate pivotable about said one rotary support axis and wherein said pivot plate is pivoted to swing said engagement element about said axis.
25. A method of releasably sealing the side edges of a filter belt extending within a tank comprising extending a sealed collapsible hose containing a liquid only partially filling said hose along each filter belt side edge;
squeezing at least a portion of each of said hoses to expand the same and create a sealing pressure on each filter edge.
26. The method of claim 25 further including installing a round tube within each of said collapsible hoses to partially distend the same to reduce the degree of squeezing necessary to fully inflate said hoses.
27. The method of claim 25 wherein said filter belt is periodically advanced to be indexed by pulling on said filter belt and wherein members are used to pull said filter belt and also squeeze said hoses and said squeezing is released when pulling on said filter belt.
28. The method of claim 23 further including guiding said filter belt by extending the opposite ends of each of said hose into a space on each side of said filter belt to guide said bars and thereby hold said filter belt in position.
29. A method of providing a support for a segment of a filter belt in a liquid tank which allows flow of liquid through said filter belt and into a collection space, comprising assembling a series of flat support pieces into an array on a solid support member to create a support surface on which said filter belt rests, each of said pieces having openings allowing said flow of liquid after passing through said filter belt.
30. The method according to claim 29 wherein said support member is curved and said support pieces are flexible to conform to said curved support member.
31. The method according to claim 29 wherein each of said support member have flow openings extending along the thickness thereof to a collection space in said filter.