US20140311964A1 - Adjustable vacuum pan assemblies for belt filters - Google Patents
Adjustable vacuum pan assemblies for belt filters Download PDFInfo
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- US20140311964A1 US20140311964A1 US14/355,663 US201214355663A US2014311964A1 US 20140311964 A1 US20140311964 A1 US 20140311964A1 US 201214355663 A US201214355663 A US 201214355663A US 2014311964 A1 US2014311964 A1 US 2014311964A1
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- United States
- Prior art keywords
- cam
- arm
- vacuum pan
- filter
- frame portion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/056—Construction of filtering bands or supporting belts, e.g. devices for centering, mounting or sealing the filtering bands or the supporting belts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/04—Filters with filtering elements which move during the filtering operation with filtering bands or the like supported on cylinders which are impervious for filtering
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L5/00—Structural features of suction cleaners
- A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
Definitions
- This invention relates to filtration processes and equipment, and more particularly to horizontal belt filter apparatus, particularly for use in minerals processing.
- FIGS. 1 , 2 , and 4 show a horizontal belt filter 900 having a conventional vacuum pan assembly 990 .
- Horizontal belt filter 900 comprises a frame 930 , a plurality of return rollers 920 and a drainage belt 910 having a number of pores 912 provided therein which are configured to pass fluid and moisture from a slurry (not shown) to the conventional vacuum pan assembly 990 positioned below the belt 910 .
- Belt 910 supports filter media 914 such as a filter cloth.
- Conventional vacuum pan assembly 990 comprises a swing arm 940 which is pivotally attached to said frame 930 by way of a pivot bracket 941 having a first pivot member 946 , and a second pivot member 936 provided to the frame 930 .
- a vacuum pan 950 having an elongated inlet 951 and a channel 952 is mounted to the swing arm 940 via a number of fasteners 953 passing through at least one mount 957 on the pan 150 .
- a wear plate 959 having a number of apertures 955 may serve as a sacrificial interface between the pan 150 and the belt 910 . Apertures 955 in the wear plate 959 allow fluid and moisture from slurry passing through pores 912 to enter the conventional vacuum pan assembly 990 positioned below the belt 910 .
- a first securing portion 944 is provided to a distal end of the swing arm 940 , opposite the pivot bracket 941 and the first pivot member 946 .
- the first securing portion 944 is configured to mate with a complementary second securing portion (not shown) provided at a predetermined location on the frame 930 of the filter 900 . Engagement between the first securing portion 944 and the second securing portion (not shown) serves to keep vacuum pan 950 and wear plate 959 in close communication with belt 910 .
- At least one shim 960 is typically placed between the swing arm 940 and mount 957 to better align the inlet 951 of the pan 950 with the pores 912 in the belt 910 and sometimes to adjust the tilt of the pan 950 to match an inclination of the belt 910 .
- the exact number and/or configuration of shims 960 may vary between each swing arm 940 and mount 957 along the length of the filter 900 , and will frequently change as portions of wear plate 959 dimensionally change (e.g., in thickness) due to continued friction with the belt 910 .
- a significant disadvantage of using shims 960 is that when used wear plates 959 are replaced with thicker new wear plates (or when any portion of the conventional vacuum pan assembly 990 such as the pan 950 itself needs to be removed for routine maintenance or cleaning), there is no simple way to restore the position of the pan 950 to a “factory default” alignment configuration with respect to the swing arm 940 .
- shims 960 necessary for use with thin worn wear plates 959 which are removed from the assembly 990 to accommodate thick new wear plates 959 , will need to be replaced in a new configuration in a lesser number in order to bring the pan 950 into proper re-alignment with the belt 910 .
- Such re-configuring and adjustment steps require unnecessary downtime and labor.
- shims are typically custom-fabricated at each shim location. Multiple shims of varying thickness are required at each shim point to achieve the desired elevation required for belt-to-pan alignment and proper vacuum seal between the belt 910 and vacuum pan assembly 990 . Shims 960 are frequently lost, mixed up or accidentally confused with other shims 960 , and additional shims 960 may need to be quickly fabricated and provided in the field in order to adjust the positioning of the vacuum pan 950 during routine maintenance.
- Jack screws often “seize” in place after a short time in operation, thereby resulting in the inability to adjust the elevation or removal of vacuum pan 950 during routine maintenance.
- Neither shims 960 or jack screws (not shown) provide a quick and efficient way to re-establish “factory-set elevation points” for a vacuum pan 950 after maintenance adjustments are performed.
- vacuum pans 950 typically involves welding an adjusting plate (not shown) to the swing arm in-situ during assembly.
- an adjusting plate not shown
- additional cleaning of the weld area and protective repainting is required.
- These extra steps add to the total commissioning time and cost.
- welding exposes expensive components (e.g., belt 910 ) to potential damage.
- the adjustable vacuum pan assembly for a belt filter.
- the adjustable vacuum pan assembly comprises an arm configured to be attached to a frame portion of the filter, a vacuum pan adjustably connected to the arm, and a cam operatively coupled to the arm.
- the arm may comprise a swing arm which is pivotally attached to said frame portion of the belt filter.
- the cam is rotatable with respect to the arm and has a peripheral surface which contacts a portion of the vacuum pan.
- the assembly further comprises a locking member which serves to hold the cam against rotation with respect to the arm. Varying an angular rotational position of the cam effectively varies a spacing between the vacuum pan and the arm, thereby providing an amount of misalignment compensation therebetween.
- the cam is operatively coupled to the arm via a bracket which may be adjustably positionable with respect to the arm in at least one direction.
- the locking member selectively engages one of a plurality of engagement surfaces on the cam to maintain a spacing between the vacuum pan and the arm.
- means for applying a torque to the cam is provided.
- the cam rotates about an axis defined by a pin, and the position of the cam along said axis may be adjusted and then limited or maintained by a stop one or more retainers.
- a belt filter is also disclosed, wherein the belt filter comprises an adjustable vacuum pan assembly as described above.
- a retrofit kit for a filter comprises a bracket configured to be mounted to an arm or other frame portion of a filter, a cam configured to be operatively coupled to said bracket, and a locking member configured to hold the cam against rotation with respect to the bracket.
- the arm may comprise a swing arm which is pivotally attached to said frame portion of the belt filter.
- the cam is rotatable with respect to the bracket and has a peripheral surface which is configured to contact a portion of a vacuum pan or other component. In use, varying an angular rotational position of the cam effectively varies a spacing between a vacuum pan and said bracket, thereby providing an amount of misalignment compensation therebetween.
- a method of providing increased adjustability to a conventional vacuum pan assembly in a filter comprises the steps of providing a cam to an arm or frame portion of a filter, providing a locking member to hold the cam against rotation with respect to the arm or frame portion, varying an angular rotational position of the cam to effectively vary a spacing between a vacuum pan and the arm or frame portion, thereby providing an appropriate amount of misalignment compensation therebetween, locking the cam from rotation using the locking member, and maintaining an appropriate spacing between a vacuum pan and said arm or frame portion during operation of said filter.
- FIG. 1 is an end cross-sectional view of a conventional horizontal belt filter
- FIG. 2 is a detailed end view of a vacuum pan of the belt filter shown in FIG. 1
- FIG. 3 shows an adjustable vacuum pan according to some embodiments
- FIG. 4 is a side view of the conventional vacuum pan shown in FIG. 1 ;
- FIG. 5 is a side view of the adjustable vacuum pan shown in FIG. 3 ;
- FIG. 6 is a detailed exploded view of the adjustable vacuum pan shown in FIG. 3 ;
- FIG. 7 is an isometric cross-sectional view of the adjustable vacuum pan shown in FIG. 3 ;
- FIG. 8 is broad isometric view of the adjustable vacuum pan shown in FIG. 3 .
- FIGS. 3 and 5 - 8 show an improved adjustable vacuum pan assembly 190 .
- the vacuum pan assembly 190 comprises a swing arm 140 which is pivotally attached to a frame portion of a filter 900 (e.g., a horizontal belt filter).
- Swing arm 140 comprises a pivot bracket 141 having a first pivot member 146 configured to communicate with a second pivot member 936 such as a pin, dowel, hinge, fulcrum, or other equivalent device provided to the frame 930 of the filter 900 .
- first pivot member 146 is provided as an aperture suitable for receiving a pin or rod; however, the first pivot member 146 may equally be a portion of a hinge or other pivoting mechanism without limitation.
- a vacuum pan 150 having one or more effluent ports 158 , an elongated inlet 151 , and a channel 152 suitable for collecting, retaining, and delivering fluid and moisture is mounted to the swing arm 140 via at least one fastener 153 passing through at least one mount 157 on the pan 150 .
- One or more wear plates 159 having a number of apertures 155 may serve as a sacrificial interface between the pan 150 and a belt 910 . Apertures 155 in each wear plate 159 allow fluid and moisture passing through pores 912 of a belt 910 to enter the vacuum pan assembly 190 positioned below the belt 910 .
- each wear plate 159 may alternatively comprise two parallel wear plates having therebetween, a spacing which similarly allows fluid to pass.
- a first securing portion 144 is provided to a distal end of the swing arm 140 , opposite the pivot bracket 141 and first pivot member 146 .
- the first securing portion 144 is configured to mate with a complementary second securing portion (not shown) provided at a predetermined location on the frame 930 of a filter 900 .
- Engagement between the first securing portion 144 and the second securing portion (not shown) serves to keep vacuum pan 150 and wear plate 159 in close communication with belt 910 .
- Fine adjustability of spacing between the pan 150 and the swing arm 140 is achieved through the use of at least one cam 170 which initially supports the mount 157 of the pan 150 in at least a Z-axis direction extending between an upper and lower portion of the filter 900 .
- Cam 170 is rotatable through a range of motion in at least one rotational degree of freedom.
- the at least one rotational degree of freedom is shown to be about an axis which is generally parallel with a long axis of the swing arm 140 extending between the pivot bracket 141 and first securing portion 144 .
- said at least one rotational degree of freedom may alternatively be about an axis which is generally perpendicular with respect to a long axis of the swing arm 140 as will be described in more detail below.
- the cam 170 is round and allows independent vertical adjustment of the pan 150 in the Z-axis direction in 0.5-5 mm increments, and even more preferably between 1 mm and 3 mm increments—for example, 1.5 mm increments.
- Swing arm 140 comprises a set of one or more oblong openings 142 which may extend longitudinally in an X-axis direction within an X-Z plane which is generally transverse to the filter 900 .
- One or more fasteners 163 extend through said oblong openings 142 and hold a bracket 160 to the swing arm 140 .
- the elongated nature of the oblong openings 142 allows bracket 160 to be mounted to the swing arm 140 with some amount of positional adjustability in at least said X-axis direction.
- bracket 160 comprises a set of one or more openings 161 which are configured to receive the fasteners 163 .
- oblong openings 142 may instead be provided on the bracket 160 , and openings 161 may be provided to the swing arm 140 .
- other means for X-axis positional adjustment may be provided, including, but not limited to: tracks, channels, sliding dovetail joints, linear bearings, or the like.
- Swing arm 140 further comprises a set of one or more oblong openings 143 which may extend longitudinally in an X-axis direction within an X-Y plane which is generally parallel to belt 910 .
- One or more fasteners 153 extend through said oblong openings 143 and hold mount 157 to the swing arm 140 .
- the elongated nature of the oblong openings 143 allows pan 150 to be mounted to the swing arm 140 with some amount of positional adjustability in at least the X-axis direction.
- one or more mounts 157 provided to the vacuum pan 150 may comprise a set of one or more oblong openings 156 which may extend longitudinally in a Y-axis direction within said X-Y plane.
- Fasteners 153 extend through said oblong openings 143 , 156 and secure the mount 157 (and therefore, pan 150 ) to the swing arm 140 .
- the elongated nature of the oblong openings 156 allows pan 150 to be mounted to the swing arm 140 with some amount of positional adjustability in at least the Y-axis direction. While not shown, it is contemplated that oblong opening sets 143 and 156 may be interchanged without negatively affecting function.
- oblong openings 143 , 156 may be collectively replaced with other means for X-Y planar positional adjustment including, but not limited to: perpendicular tracks, perpendicular channels, perpendicular sliding dovetail joints, planar bearings, etc. While specifically shown as nuts and bolts, it should be noted that fasteners 153 , 163 according to the invention may be of any suitable type including, but not limited to: headed rivets, clevis pins, weld studs, and the like.
- Bracket 160 comprises a pin 165 which is configured to receive a cam 170 via an aperture 177 provided to said cam 170 which is offset of center (i.e., the cam 170 is eccentric).
- Pin 165 may be modular (e.g., provided as a bolt secured to the bracket 160 with a nut), or pin 165 may be permanently attached to the bracket (e.g., a weld stud).
- a torque boss 171 may be provided to the cam 170 .
- torque boss 171 is concentric or otherwise co-axial with said aperture 177 .
- Cam 170 further comprises a plurality of engagement surfaces 178 which are displaced various distances from said aperture 177 and are positioned at different locations relative to the aperture 177 .
- the engagement surfaces 178 are configured to accept a locking member 169 which is adapted to fix the cam 170 in place in at least 5 degrees of freedom with respect to the bracket 160 . In the very least, locking member 169 prevents a rotational movement of the cam 170 .
- cam 170 may be permitted to move in a direction along the axis of pin 165 and aperture 177 (i.e., in an X-axis direction) and contact a stop 154 provided on the pan 150 or pan mount(s) 157 or other portion of the assembly 190 in order to limit lateral movement of the cam 170 .
- Smooth peripheral surfaces on the cam 170 enable some amount of horizontal displacement of the cam 170 in the X-axis direction or Y-axis direction, without affecting the vertical positioning of the vacuum pan 150 in the Z-axis direction, thereby eliminating the need for an additional adjusting plate and the step of welding said adjusting plate to the assembly 990 in-situ.
- the cam 170 may be fixed in 6 degrees of freedom relative to the swing arm 140 by one or more retainers 164 , 166 located on either side of the cam.
- retainers 164 , 166 may comprise threaded lock nuts which engage threads provided to pin 165 .
- retainers 164 , 166 may comprise internal lock washers having biting teeth in the internal diameter surfaces which lock to pin 165 when axially pressed axially onto pin 165 .
- retainers 164 , 166 may comprise small locking detent pins, positive lock pins, or set screws which transversely engage the pin 165 .
- an operator inputs a torque on the torque boss 171 , which in turn rotates cam 170 about pin 165 .
- Outer peripheral surfaces of cam 170 ride/slide along mount 157 , which acts as a “follower”.
- pan 150 moves up or down in a Z-axis direction, thereby increasing or decreasing a distance between the belt 910 and the adjustable vacuum pan assembly 190 .
- the spacing between belt 910 and wear plate 159 can be reversibly set in place by engaging a locking member 169 with one of the engagement surfaces 178 provided on the cam 170 .
- Engagement surfaces 178 are preferably marked with indicia to indicate factory set points and indicate an amount of adjustment (e.g., in millimetres). This eliminates the need for a maintenance worker to go through several step iterations to realign the vacuum pan 150 following routine maintenance or disassembly.
- engagement surfaces 178 are apertures which are configured to receive a locking member 169 in the form of a pin.
- At least one oblong opening 167 may extend longitudinally in a Y-axis direction in a median/sagittal Y-Z plane.
- Locking member 169 may extend through said oblong opening 167 and thereby hold cam 170 against rotational freedom about pin 165 .
- Securement of locking member 169 may be facilitated by a retainer 162 provided on both an inside portion of bracket 160 , and an outside portion of bracket 160 , wherein the retainers 162 communicate with the locking member 169 and sandwich the oblong opening 167 and cam 170 therebetween. Consequently, pan 150 may be propped up to a desired elevation with respect to the belt 910 in at least a Z-axis direction.
- oblong opening 167 allows cam 170 to be fixedly positioned to the bracket 160 in a plurality of rotational angles utilizing a “peg-in-hole” configuration.
- oblong opening 167 , retainer 169 , and engagement surfaces 178 may be replaced with other means for securing against rotation of the cam 170 about pin 165 , including, but not limited to: pawl and ratchet systems, worm drives (e.g., wherein peripheral cam surfaces are toothed), clamp members, and/or semi-permanent tack welds or other form of reversible or temporary adhesive bonding.
- retainers 162 may be of any suitable type including, but not limited to: headed rivets, clevis pins, set screws, and the like.
- fastener 153 may be fully tightened or otherwise engaged to further secure the pan 150 to the swing arm 140 in at least a Z-axis direction.
- small horizontal positional adjustments of the vacuum pan 150 relative to belt 910 may be made by loosening fasteners 153 , 163 and subsequently sliding bracket 160 along the swing arm 140 in the X-axis direction, wherein the fasteners 163 , 153 slide in oblong openings 142 , 143 , respectively.
- the bracket 160 and pan 150 may then be fixed into place with respect to the swing arm 140 by tightening fasteners 153 , 163 .
- horizontal positional adjustments of the vacuum pan 150 relative to belt 910 may be made by loosening fastener 153 and subsequently sliding pan 150 along the swing arm 140 in the X-axis direction to a desired location, wherein the fasteners 153 slide in oblong openings 143 of the swing arm 140 .
- Securement of the pan 150 with respect to the swing arm 140 begins by tightening fasteners 163 so as to secure bracket 160 to swing arm 140 .
- Retainers 164 . 166 provided on pin 165 which extends from the bracket 160 are positioned along the pin 165 in an X-axis direction so as to move cam 170 laterally against stop 154 .
- the Z-axis position of the pan 150 may then be set by rotating cam 170 about pin 165 to a desired location, and then fixing the rotational position of cam 170 with locking member 169 . Thereafter, fastener 153 may be fully tightened or otherwise engaged to secure the pan 150 to the swing arm 140 in at least a Z-axis direction.
- a contractor or other entity may provide a belt filter, vacuum pan assembly, or component of vacuum pan assembly, or operate a belt filter or vacuum pan assembly in whole, or in part, as shown and described.
- the contractor may receive a bid request for a project related to designing or operating a belt filter or vacuum pan assembly, or the contractor may offer to design such a system or a process for a client.
- the contractor may then provide, for example, any one or more of the devices or features thereof shown and/or described in the embodiments discussed above.
- the contractor may provide such devices by selling those devices or by offering to sell those devices.
- the contractor may provide various embodiments that are sized, shaped, and/or otherwise configured to meet the design criteria of a particular client or customer.
- the contractor may subcontract the fabrication, delivery, sale, or installation of a component of the devices disclosed, or of other devices used to provide said devices.
- the contractor may also survey a site and design or designate one or more storage areas for stacking the material used to manufacture the devices, or for storing the devices and/or components thereof.
- the contractor may also maintain, modify, or upgrade the provided devices.
- the contractor may provide such maintenance or modifications by subcontracting such services or by directly providing those services or components needed for said maintenance or modifications, and in some cases, the contractor may modify a preexisting conventional filter, vacuum pan assembly, or parts thereof with a “retrofit kit” to arrive at a modified filter system comprising one or more method steps, devices, components, or features of the systems and processes discussed herein.
- swing arm 140 and corresponding vacuum pan 150 may comprise different shapes and sizes depending on the overall size and design specifications of a filter 900 .
- oblong openings 142 , 143 , 156 , 167 are primarily shown in the drawings as through holes, oblong openings may be blind openings and/or may comprise any one or more of the following without limitation: cutouts, a series of closely-spaced non-oblong apertures (threaded or non-threaded), notches, detent configurations, pockets, pawl and ratchet adjustment mechanisms, grooves, channels, depressions, dovetails, and/or undercuts.
- male members shown herein such as locking member 169 may comprise threads, for example, in the form of a set screw.
- adjustable vacuum pan assembly 190 may be modular, removable, “bolt-on”, or “weld-on” components which are provided individually or collectively within a “retrofit kit”. Such components may therefore be interchanged with or added to preexisting conventional vacuum pan assemblies 990 to achieve the benefits of the invention.
- a retrofit kit may comprise one or more mounts 157 or adapters to accommodate preexisting conventional mounts 957 . Said adapters can be bolted or welded to preexisting conventional mounts 957 or other portions of a preexisting conventional vacuum pan 950 .
- Such adapters may comprise one or more stops 154 , additional flanges or flange extenders, extension members, spacers, or one or more universal mounting features such as oblong openings 156 which are configured to accept at least one fastener 153 .
- torque boss 171 may be eliminated in favor of other means for applying a torque to the cam 170 .
- Such means may comprise, for instance, torque-application surfaces provided as one or more “flats” which are located at selected peripheral locations of the cam 170 .
- Such means may also comprise a lever or handle which extends from the cam, or a peripheral cavity which is engagable by a separate torque arm or cheater bar.
- male and female components disclosed herein may be reversed and still be within the scope of the disclosure.
- male pin 165 provided to bracket 160 and female aperture provided to cam 170 may be reversed so that the pin 164 extends from the cam 170 and into the bracket 160 .
- engagement surfaces 178 are shown to be provided on the cam 170
- oblong opening 167 is shown to be provided on the bracket 160
- the two may obviously be reversed such that the engagement surfaces are provided on the bracket 160
- oblong opening 167 is provided on the cam 170 .
- brackets 160 may further comprise one or more wear belt guides 180 —each having one or more rollers or bearing members 182 provided thereon to provide support and/or lateral guidance for a wear belt (not shown) which travels within upper grooves formed in wear plate 159 and contacts belt 910 .
- cams 170 may vary. For instance, while two cams 170 are shown in FIGS. 4-8 , a single cam 170 or more than two cams 170 may be employed without departing from the scope of the invention. Moreover, while cams 170 are shown to be mounted to the swing arm 140 , they may inversely be connected to mounts 157 , wherein peripheral surfaces of the cam 170 engage a portion of the swing arm 140 to effectively vary a spacing therebetween. Alternatively, cams 170 may be provided to the swing arm 140 directly, without the need for a bracket 160 .
- swing arm 140 may comprise a portion of a linkage (e.g., of the four-bar type), which moves pan 150 up and down in a Z-axis direction. Or the swing arm 140 may be configured to “tilt” or pivot with respect to the belt 910 and travel in an arcuate transverse path as shown. Additionally, bracket 160 may be mounted to other types of vacuum pan 150 raising and lowering systems such as those disclosed in U.S. Pat. Nos. 4,336,139, 4,080,298, 3,992,298, and 4,671,876. In some instances, swing arm 140 may not necessarily be configured to “swing” at all.
- an “arm”, where the term is used herein, may simply comprise a static portion of a filter's frame 930 , or may comprise an arm 140 which is connected at both ends to other frame portions 930 . Such connections may be realized using welding, bolting, or adjustable mounting means.
- the arm 140 may also be moved linearly in a Z-axis direction with respect to said belt 910 without swinging, for example, via the use of one or more mechanical actuators, compressible or incompressible fluid cylinders, or electric solenoids.
- arm 140 may ride on a track, and cams 170 may be fixed to frame portions 930 which are adjacent to end portions of the arm 140 . Z-axis positioning and tilt of the arm 140 with respect to frame 930 may be adjusted by rotating and then subsequently immobilizing the cams 170 relative to the frame 930 using a locking member 169 .
- adjustable vacuum pan assemblies 190 of the invention may be used in other applications requiring quick fine adjustment between two adjacent components.
- assemblies 190 and components thereof which are shown and described herein may have equal applicability on table filters and belt filter presses.
Abstract
Description
- This application claims priority to U.S. Provisional Patent Application Ser. No. 61/555,040 filed on 3 Nov. 2011.
- This invention relates to filtration processes and equipment, and more particularly to horizontal belt filter apparatus, particularly for use in minerals processing.
-
FIGS. 1 , 2, and 4 show ahorizontal belt filter 900 having a conventionalvacuum pan assembly 990.Horizontal belt filter 900 comprises aframe 930, a plurality ofreturn rollers 920 and adrainage belt 910 having a number ofpores 912 provided therein which are configured to pass fluid and moisture from a slurry (not shown) to the conventionalvacuum pan assembly 990 positioned below thebelt 910.Belt 910 supportsfilter media 914 such as a filter cloth. Conventionalvacuum pan assembly 990 comprises aswing arm 940 which is pivotally attached to saidframe 930 by way of apivot bracket 941 having afirst pivot member 946, and asecond pivot member 936 provided to theframe 930. Avacuum pan 950 having anelongated inlet 951 and achannel 952 is mounted to theswing arm 940 via a number offasteners 953 passing through at least onemount 957 on thepan 150. Awear plate 959 having a number ofapertures 955 may serve as a sacrificial interface between thepan 150 and thebelt 910.Apertures 955 in thewear plate 959 allow fluid and moisture from slurry passing throughpores 912 to enter the conventionalvacuum pan assembly 990 positioned below thebelt 910. A first securingportion 944 is provided to a distal end of theswing arm 940, opposite thepivot bracket 941 and thefirst pivot member 946. Thefirst securing portion 944 is configured to mate with a complementary second securing portion (not shown) provided at a predetermined location on theframe 930 of thefilter 900. Engagement between thefirst securing portion 944 and the second securing portion (not shown) serves to keepvacuum pan 950 and wearplate 959 in close communication withbelt 910. - As best shown in
FIGS. 2 and 3 , at least oneshim 960 is typically placed between theswing arm 940 andmount 957 to better align theinlet 951 of thepan 950 with thepores 912 in thebelt 910 and sometimes to adjust the tilt of thepan 950 to match an inclination of thebelt 910. The exact number and/or configuration ofshims 960 may vary between eachswing arm 940 andmount 957 along the length of thefilter 900, and will frequently change as portions ofwear plate 959 dimensionally change (e.g., in thickness) due to continued friction with thebelt 910. - A significant disadvantage of using
shims 960 is that when usedwear plates 959 are replaced with thicker new wear plates (or when any portion of the conventionalvacuum pan assembly 990 such as thepan 950 itself needs to be removed for routine maintenance or cleaning), there is no simple way to restore the position of thepan 950 to a “factory default” alignment configuration with respect to theswing arm 940. In other words,shims 960 necessary for use with thinworn wear plates 959, which are removed from theassembly 990 to accommodate thicknew wear plates 959, will need to be replaced in a new configuration in a lesser number in order to bring thepan 950 into proper re-alignment with thebelt 910. Such re-configuring and adjustment steps require unnecessary downtime and labor. - To add to the abovementioned problem, shims are typically custom-fabricated at each shim location. Multiple shims of varying thickness are required at each shim point to achieve the desired elevation required for belt-to-pan alignment and proper vacuum seal between the
belt 910 andvacuum pan assembly 990.Shims 960 are frequently lost, mixed up or accidentally confused withother shims 960, andadditional shims 960 may need to be quickly fabricated and provided in the field in order to adjust the positioning of thevacuum pan 950 during routine maintenance. - Jack screws often “seize” in place after a short time in operation, thereby resulting in the inability to adjust the elevation or removal of
vacuum pan 950 during routine maintenance. Neithershims 960 or jack screws (not shown) provide a quick and efficient way to re-establish “factory-set elevation points” for avacuum pan 950 after maintenance adjustments are performed. - Conventionally, the horizontal adjustment of
vacuum pans 950 typically involves welding an adjusting plate (not shown) to the swing arm in-situ during assembly. As a result of in-situ welding, additional cleaning of the weld area and protective repainting is required. These extra steps add to the total commissioning time and cost. Moreover, welding exposes expensive components (e.g., belt 910) to potential damage. - It is, therefore, an object of the invention to provide a vacuum pan assembly which reduces down time for users during routine maintenance.
- It is also an object of the invention to provide a vacuum pan assembly which requires less shop assembly time and does not require welding and subsequent protective painting.
- It is also an object of the invention to provide a vacuum pan assembly adjustment mechanism which is easily adapted for and configured to be used with current filters using shims and jacks, thereby providing a valuable aftermarket conversion kit.
- It is also an object of the invention to provide a device which enables a user of a filter to adjust a vacuum pan both vertically and horizontally using a single mechanism.
- It is also an object of the invention to provide adjustment means to a vacuum pan which allows horizontal adjustment without the need for a providing a separately-welded adjusting plate, and welding in assembly.
- These and many other objects of the invention will be apparent from the drawings and description herein. Although every object of the invention is believed to be attained by at least one embodiment of the invention, there is not necessarily any one embodiment of the invention that achieves all of the objects of the invention.
- An adjustable vacuum pan assembly for a belt filter is disclosed. The adjustable vacuum pan assembly comprises an arm configured to be attached to a frame portion of the filter, a vacuum pan adjustably connected to the arm, and a cam operatively coupled to the arm. The arm may comprise a swing arm which is pivotally attached to said frame portion of the belt filter. The cam is rotatable with respect to the arm and has a peripheral surface which contacts a portion of the vacuum pan. The assembly further comprises a locking member which serves to hold the cam against rotation with respect to the arm. Varying an angular rotational position of the cam effectively varies a spacing between the vacuum pan and the arm, thereby providing an amount of misalignment compensation therebetween. In some embodiments, the cam is operatively coupled to the arm via a bracket which may be adjustably positionable with respect to the arm in at least one direction. In some embodiments, the locking member selectively engages one of a plurality of engagement surfaces on the cam to maintain a spacing between the vacuum pan and the arm. In some embodiments, means for applying a torque to the cam is provided. In some embodiments, the cam rotates about an axis defined by a pin, and the position of the cam along said axis may be adjusted and then limited or maintained by a stop one or more retainers.
- A belt filter is also disclosed, wherein the belt filter comprises an adjustable vacuum pan assembly as described above.
- A retrofit kit for a filter is also disclosed. The kit comprises a bracket configured to be mounted to an arm or other frame portion of a filter, a cam configured to be operatively coupled to said bracket, and a locking member configured to hold the cam against rotation with respect to the bracket. The arm may comprise a swing arm which is pivotally attached to said frame portion of the belt filter. The cam is rotatable with respect to the bracket and has a peripheral surface which is configured to contact a portion of a vacuum pan or other component. In use, varying an angular rotational position of the cam effectively varies a spacing between a vacuum pan and said bracket, thereby providing an amount of misalignment compensation therebetween.
- Also disclosed is a method of providing increased adjustability to a conventional vacuum pan assembly in a filter. The method comprises the steps of providing a cam to an arm or frame portion of a filter, providing a locking member to hold the cam against rotation with respect to the arm or frame portion, varying an angular rotational position of the cam to effectively vary a spacing between a vacuum pan and the arm or frame portion, thereby providing an appropriate amount of misalignment compensation therebetween, locking the cam from rotation using the locking member, and maintaining an appropriate spacing between a vacuum pan and said arm or frame portion during operation of said filter.
-
FIG. 1 is an end cross-sectional view of a conventional horizontal belt filter; -
FIG. 2 is a detailed end view of a vacuum pan of the belt filter shown inFIG. 1 -
FIG. 3 shows an adjustable vacuum pan according to some embodiments; -
FIG. 4 is a side view of the conventional vacuum pan shown inFIG. 1 ; -
FIG. 5 is a side view of the adjustable vacuum pan shown inFIG. 3 ; -
FIG. 6 is a detailed exploded view of the adjustable vacuum pan shown inFIG. 3 ; -
FIG. 7 is an isometric cross-sectional view of the adjustable vacuum pan shown inFIG. 3 ; and, -
FIG. 8 is broad isometric view of the adjustable vacuum pan shown inFIG. 3 . - FIGS. 3 and 5-8 show an improved adjustable
vacuum pan assembly 190. Thevacuum pan assembly 190 comprises aswing arm 140 which is pivotally attached to a frame portion of a filter 900 (e.g., a horizontal belt filter).Swing arm 140 comprises apivot bracket 141 having afirst pivot member 146 configured to communicate with asecond pivot member 936 such as a pin, dowel, hinge, fulcrum, or other equivalent device provided to theframe 930 of thefilter 900. In the exemplary embodiment shown,first pivot member 146 is provided as an aperture suitable for receiving a pin or rod; however, thefirst pivot member 146 may equally be a portion of a hinge or other pivoting mechanism without limitation. Avacuum pan 150 having one or moreeffluent ports 158, anelongated inlet 151, and achannel 152 suitable for collecting, retaining, and delivering fluid and moisture is mounted to theswing arm 140 via at least onefastener 153 passing through at least onemount 157 on thepan 150. One ormore wear plates 159 having a number ofapertures 155 may serve as a sacrificial interface between thepan 150 and abelt 910.Apertures 155 in eachwear plate 159 allow fluid and moisture passing throughpores 912 of abelt 910 to enter thevacuum pan assembly 190 positioned below thebelt 910. While not shown, it is envisaged that eachwear plate 159 may alternatively comprise two parallel wear plates having therebetween, a spacing which similarly allows fluid to pass. Afirst securing portion 144 is provided to a distal end of theswing arm 140, opposite thepivot bracket 141 andfirst pivot member 146. Thefirst securing portion 144 is configured to mate with a complementary second securing portion (not shown) provided at a predetermined location on theframe 930 of afilter 900. Engagement between thefirst securing portion 144 and the second securing portion (not shown) serves to keepvacuum pan 150 and wearplate 159 in close communication withbelt 910. - Fine adjustability of spacing between the
pan 150 and theswing arm 140 is achieved through the use of at least onecam 170 which initially supports themount 157 of thepan 150 in at least a Z-axis direction extending between an upper and lower portion of thefilter 900.Cam 170 is rotatable through a range of motion in at least one rotational degree of freedom. The at least one rotational degree of freedom is shown to be about an axis which is generally parallel with a long axis of theswing arm 140 extending between thepivot bracket 141 and first securingportion 144. However, while not shown, said at least one rotational degree of freedom may alternatively be about an axis which is generally perpendicular with respect to a long axis of theswing arm 140 as will be described in more detail below. In some preferred embodiments, thecam 170 is round and allows independent vertical adjustment of thepan 150 in the Z-axis direction in 0.5-5 mm increments, and even more preferably between 1 mm and 3 mm increments—for example, 1.5 mm increments. -
Swing arm 140 comprises a set of one or moreoblong openings 142 which may extend longitudinally in an X-axis direction within an X-Z plane which is generally transverse to thefilter 900. One ormore fasteners 163 extend through saidoblong openings 142 and hold abracket 160 to theswing arm 140. The elongated nature of theoblong openings 142 allowsbracket 160 to be mounted to theswing arm 140 with some amount of positional adjustability in at least said X-axis direction. In the embodiment shown,bracket 160 comprises a set of one ormore openings 161 which are configured to receive thefasteners 163. However, it is contemplated that while not shown,oblong openings 142 may instead be provided on thebracket 160, andopenings 161 may be provided to theswing arm 140. Moreover, other means for X-axis positional adjustment may be provided, including, but not limited to: tracks, channels, sliding dovetail joints, linear bearings, or the like. -
Swing arm 140 further comprises a set of one or moreoblong openings 143 which may extend longitudinally in an X-axis direction within an X-Y plane which is generally parallel tobelt 910. One ormore fasteners 153 extend through saidoblong openings 143 and holdmount 157 to theswing arm 140. The elongated nature of theoblong openings 143 allowspan 150 to be mounted to theswing arm 140 with some amount of positional adjustability in at least the X-axis direction. Similarly, one ormore mounts 157 provided to thevacuum pan 150 may comprise a set of one or moreoblong openings 156 which may extend longitudinally in a Y-axis direction within said X-Y plane.Fasteners 153 extend through saidoblong openings swing arm 140. The elongated nature of theoblong openings 156 allowspan 150 to be mounted to theswing arm 140 with some amount of positional adjustability in at least the Y-axis direction. While not shown, it is contemplated that oblong opening sets 143 and 156 may be interchanged without negatively affecting function. Moreover,oblong openings fasteners -
Bracket 160 comprises apin 165 which is configured to receive acam 170 via anaperture 177 provided to saidcam 170 which is offset of center (i.e., thecam 170 is eccentric).Pin 165 may be modular (e.g., provided as a bolt secured to thebracket 160 with a nut), or pin 165 may be permanently attached to the bracket (e.g., a weld stud). - A
torque boss 171 may be provided to thecam 170. In some embodiments,torque boss 171 is concentric or otherwise co-axial with saidaperture 177.Cam 170 further comprises a plurality ofengagement surfaces 178 which are displaced various distances from saidaperture 177 and are positioned at different locations relative to theaperture 177. The engagement surfaces 178 are configured to accept a lockingmember 169 which is adapted to fix thecam 170 in place in at least 5 degrees of freedom with respect to thebracket 160. In the very least, lockingmember 169 prevents a rotational movement of thecam 170. In some embodiments,cam 170 may be permitted to move in a direction along the axis ofpin 165 and aperture 177 (i.e., in an X-axis direction) and contact astop 154 provided on thepan 150 or pan mount(s) 157 or other portion of theassembly 190 in order to limit lateral movement of thecam 170. Smooth peripheral surfaces on thecam 170 enable some amount of horizontal displacement of thecam 170 in the X-axis direction or Y-axis direction, without affecting the vertical positioning of thevacuum pan 150 in the Z-axis direction, thereby eliminating the need for an additional adjusting plate and the step of welding said adjusting plate to theassembly 990 in-situ. If desired, thecam 170 may be fixed in 6 degrees of freedom relative to theswing arm 140 by one ormore retainers retainers retainers pin 165. In yet even other embodiments,retainers pin 165. - In use, an operator inputs a torque on the
torque boss 171, which in turn rotatescam 170 aboutpin 165. Outer peripheral surfaces ofcam 170 ride/slide alongmount 157, which acts as a “follower”. Ascam 170 is rotated, pan 150 moves up or down in a Z-axis direction, thereby increasing or decreasing a distance between thebelt 910 and the adjustablevacuum pan assembly 190. Once the desired position of the adjustablevacuum pan assembly 190 is set in the Z-axis direction, the spacing betweenbelt 910 and wearplate 159 can be reversibly set in place by engaging a lockingmember 169 with one of the engagement surfaces 178 provided on thecam 170. Engagement surfaces 178 are preferably marked with indicia to indicate factory set points and indicate an amount of adjustment (e.g., in millimetres). This eliminates the need for a maintenance worker to go through several step iterations to realign thevacuum pan 150 following routine maintenance or disassembly. - In the particular embodiment shown, engagement surfaces 178 are apertures which are configured to receive a locking
member 169 in the form of a pin. At least oneoblong opening 167 may extend longitudinally in a Y-axis direction in a median/sagittal Y-Z plane. Lockingmember 169 may extend through saidoblong opening 167 and thereby holdcam 170 against rotational freedom aboutpin 165. Securement of lockingmember 169 may be facilitated by aretainer 162 provided on both an inside portion ofbracket 160, and an outside portion ofbracket 160, wherein theretainers 162 communicate with the lockingmember 169 and sandwich theoblong opening 167 andcam 170 therebetween. Consequently, pan 150 may be propped up to a desired elevation with respect to thebelt 910 in at least a Z-axis direction. - The elongated nature of the one or more
oblong openings 167 allowscam 170 to be fixedly positioned to thebracket 160 in a plurality of rotational angles utilizing a “peg-in-hole” configuration. However, while not shown, it is contemplated thatoblong opening 167,retainer 169, andengagement surfaces 178 may be replaced with other means for securing against rotation of thecam 170 aboutpin 165, including, but not limited to: pawl and ratchet systems, worm drives (e.g., wherein peripheral cam surfaces are toothed), clamp members, and/or semi-permanent tack welds or other form of reversible or temporary adhesive bonding. While specifically shown as clips, it should be noted thatretainers 162 according to the invention may be of any suitable type including, but not limited to: headed rivets, clevis pins, set screws, and the like. - Once the Z-axis position of the
pan 150 is set bycam 170 and fixed by lockingmember 169,fastener 153 may be fully tightened or otherwise engaged to further secure thepan 150 to theswing arm 140 in at least a Z-axis direction. However, prior to settingfastener 153, small horizontal positional adjustments of thevacuum pan 150 relative to belt 910 may be made by looseningfasteners bracket 160 along theswing arm 140 in the X-axis direction, wherein thefasteners oblong openings bracket 160 and pan 150 may then be fixed into place with respect to theswing arm 140 by tighteningfasteners - Alternatively, and more preferably, horizontal positional adjustments of the
vacuum pan 150 relative to belt 910 may be made by looseningfastener 153 and subsequently slidingpan 150 along theswing arm 140 in the X-axis direction to a desired location, wherein thefasteners 153 slide inoblong openings 143 of theswing arm 140. Securement of thepan 150 with respect to theswing arm 140 begins by tighteningfasteners 163 so as to securebracket 160 to swingarm 140.Retainers 164. 166 provided onpin 165 which extends from thebracket 160 are positioned along thepin 165 in an X-axis direction so as to movecam 170 laterally againststop 154. Forces acting in the X-axis direction are applied to thestop 154 by thecam 170 and move or bend thepan 150 into longitudinal alignment withpores 912 in thebelt 910. The Z-axis position of thepan 150 may then be set by rotatingcam 170 aboutpin 165 to a desired location, and then fixing the rotational position ofcam 170 with lockingmember 169. Thereafter,fastener 153 may be fully tightened or otherwise engaged to secure thepan 150 to theswing arm 140 in at least a Z-axis direction. - A contractor or other entity may provide a belt filter, vacuum pan assembly, or component of vacuum pan assembly, or operate a belt filter or vacuum pan assembly in whole, or in part, as shown and described. For instance, the contractor may receive a bid request for a project related to designing or operating a belt filter or vacuum pan assembly, or the contractor may offer to design such a system or a process for a client. The contractor may then provide, for example, any one or more of the devices or features thereof shown and/or described in the embodiments discussed above. The contractor may provide such devices by selling those devices or by offering to sell those devices. The contractor may provide various embodiments that are sized, shaped, and/or otherwise configured to meet the design criteria of a particular client or customer. The contractor may subcontract the fabrication, delivery, sale, or installation of a component of the devices disclosed, or of other devices used to provide said devices. The contractor may also survey a site and design or designate one or more storage areas for stacking the material used to manufacture the devices, or for storing the devices and/or components thereof. The contractor may also maintain, modify, or upgrade the provided devices. The contractor may provide such maintenance or modifications by subcontracting such services or by directly providing those services or components needed for said maintenance or modifications, and in some cases, the contractor may modify a preexisting conventional filter, vacuum pan assembly, or parts thereof with a “retrofit kit” to arrive at a modified filter system comprising one or more method steps, devices, components, or features of the systems and processes discussed herein.
- Although the invention has been described in terms of particular embodiments and applications, one of ordinary skill in the art, in light of this teaching, can generate additional embodiments and modifications without departing from the spirit of or exceeding the scope of the claimed.
- For example, it is envisaged that
swing arm 140 andcorresponding vacuum pan 150 may comprise different shapes and sizes depending on the overall size and design specifications of afilter 900. Moreover, while oblongopenings member 169 may comprise threads, for example, in the form of a set screw. - Furthermore, features and components of the adjustable
vacuum pan assembly 190 may be modular, removable, “bolt-on”, or “weld-on” components which are provided individually or collectively within a “retrofit kit”. Such components may therefore be interchanged with or added to preexisting conventionalvacuum pan assemblies 990 to achieve the benefits of the invention. In some instances, a retrofit kit may comprise one ormore mounts 157 or adapters to accommodate preexistingconventional mounts 957. Said adapters can be bolted or welded to preexistingconventional mounts 957 or other portions of a preexistingconventional vacuum pan 950. Such adapters may comprise one ormore stops 154, additional flanges or flange extenders, extension members, spacers, or one or more universal mounting features such asoblong openings 156 which are configured to accept at least onefastener 153. - It should be known that in some embodiments,
torque boss 171 may be eliminated in favor of other means for applying a torque to thecam 170. Such means may comprise, for instance, torque-application surfaces provided as one or more “flats” which are located at selected peripheral locations of thecam 170. Such means may also comprise a lever or handle which extends from the cam, or a peripheral cavity which is engagable by a separate torque arm or cheater bar. - It is contemplated that in some embodiments, male and female components disclosed herein may be reversed and still be within the scope of the disclosure. For example,
male pin 165 provided tobracket 160 and female aperture provided tocam 170 may be reversed so that thepin 164 extends from thecam 170 and into thebracket 160. Similarly, while engagement surfaces 178 are shown to be provided on thecam 170, andoblong opening 167 is shown to be provided on thebracket 160, the two may obviously be reversed such that the engagement surfaces are provided on thebracket 160, andoblong opening 167 is provided on thecam 170. - Moreover, the joining of
fasteners Mounts 157 and/orfasteners FIGS. 7-8 ,brackets 160 according to the invention may further comprise one or more wear belt guides 180—each having one or more rollers or bearingmembers 182 provided thereon to provide support and/or lateral guidance for a wear belt (not shown) which travels within upper grooves formed inwear plate 159 andcontacts belt 910. - Furthermore, the number and configuration of components described may vary. For instance, while two
cams 170 are shown inFIGS. 4-8 , asingle cam 170 or more than twocams 170 may be employed without departing from the scope of the invention. Moreover, whilecams 170 are shown to be mounted to theswing arm 140, they may inversely be connected tomounts 157, wherein peripheral surfaces of thecam 170 engage a portion of theswing arm 140 to effectively vary a spacing therebetween. Alternatively,cams 170 may be provided to theswing arm 140 directly, without the need for abracket 160. This may be accomplished, for example, by orienting thecam 170 ninety degrees from what is shown in the drawings, so that it is parallel to theswing arm 140, providingpin 165 directly to theswing arm 140—on which thecam 170 rotates, and providing a lockingmember 169 which engages or otherwise communicates with theswing arm 140 to prevent rotation of thecam 170 relative to theswing arm 140. - In some instances,
swing arm 140 may comprise a portion of a linkage (e.g., of the four-bar type), which movespan 150 up and down in a Z-axis direction. Or theswing arm 140 may be configured to “tilt” or pivot with respect to thebelt 910 and travel in an arcuate transverse path as shown. Additionally,bracket 160 may be mounted to other types ofvacuum pan 150 raising and lowering systems such as those disclosed in U.S. Pat. Nos. 4,336,139, 4,080,298, 3,992,298, and 4,671,876. In some instances,swing arm 140 may not necessarily be configured to “swing” at all. In other words, it is envisaged that an “arm”, where the term is used herein, may simply comprise a static portion of a filter'sframe 930, or may comprise anarm 140 which is connected at both ends toother frame portions 930. Such connections may be realized using welding, bolting, or adjustable mounting means. Thearm 140 may also be moved linearly in a Z-axis direction with respect to saidbelt 910 without swinging, for example, via the use of one or more mechanical actuators, compressible or incompressible fluid cylinders, or electric solenoids. In some embodiments,arm 140 may ride on a track, andcams 170 may be fixed to frameportions 930 which are adjacent to end portions of thearm 140. Z-axis positioning and tilt of thearm 140 with respect to frame 930 may be adjusted by rotating and then subsequently immobilizing thecams 170 relative to theframe 930 using a lockingmember 169. - It should also be noted that while shown specifically on a
horizontal belt filter 900, adjustablevacuum pan assemblies 190 of the invention may be used in other applications requiring quick fine adjustment between two adjacent components. For example,assemblies 190 and components thereof which are shown and described herein may have equal applicability on table filters and belt filter presses. - Accordingly, it is to be understood that the drawings and descriptions herein are proffered by way of example to facilitate comprehension of the invention and should not be construed to limit the scope thereof.
-
- 900 Filter
- 910 Drainage belt
- 912 Pores
- 914 Filter media
- 920 Return roller
- 930 Frame
- 936 Second pivot member
- 940 Swing arm
- 941 Pivot bracket
- 944 First securing portion
- 946 First pivot member
- 950 Pan
- 951 Inlet
- 952 Channel
- 953 Fastener
- 955 Aperture
- 957 Mount
- 959 Wear plate
- 960 Shim
- 990 Conventional vacuum pan assembly
- 140 Swing arm
- 141 Pivot bracket
- 142 Oblong opening (X-axis direction)
- 143 Oblong opening (X-axis direction)
- 144 First securing portion
- 146 First pivot member
- 150 Pan
- 151 Inlet
- 152 Channel
- 153 Fastener
- 154 Stop
- 155 Aperture
- 156 Oblong opening (Y-axis direction)
- 157 Mount
- 158 Port
- 159 Wear plate
- 160 Bracket
- 161 Opening
- 162 Retainer
- 163 Fastener
- 164 Retainer
- 165 Pin
- 166 Retainer
- 167 Oblong opening (Y-axis direction)
- 169 Locking member
- 170 Cam
- 171 Torque boss
- 177 Aperture
- 178 Plurality of engagement surfaces
- 180 Wear belt guide
- 182 Roller or bearing member
- 190 Adjustable vacuum pan assembly
Claims (27)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/355,663 US8857626B1 (en) | 2011-11-03 | 2012-11-02 | Adjustable vacuum pan assemblies for belt filters |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201161555040P | 2011-11-03 | 2011-11-03 | |
US14/355,663 US8857626B1 (en) | 2011-11-03 | 2012-11-02 | Adjustable vacuum pan assemblies for belt filters |
PCT/US2012/063323 WO2013067352A1 (en) | 2011-11-03 | 2012-11-02 | Adjustable vacuum pan assemblies for belt filters |
Publications (2)
Publication Number | Publication Date |
---|---|
US8857626B1 US8857626B1 (en) | 2014-10-14 |
US20140311964A1 true US20140311964A1 (en) | 2014-10-23 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/355,663 Expired - Fee Related US8857626B1 (en) | 2011-11-03 | 2012-11-02 | Adjustable vacuum pan assemblies for belt filters |
Country Status (12)
Country | Link |
---|---|
US (1) | US8857626B1 (en) |
EP (1) | EP2782655A4 (en) |
JP (1) | JP2014534064A (en) |
KR (1) | KR20140108224A (en) |
CN (1) | CN104136089B (en) |
AU (1) | AU2012332260B2 (en) |
BR (1) | BR112014010672A2 (en) |
CA (1) | CA2854002C (en) |
CL (1) | CL2014001117A1 (en) |
PE (1) | PE20141628A1 (en) |
WO (1) | WO2013067352A1 (en) |
ZA (1) | ZA201403199B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9381863B2 (en) * | 2013-09-05 | 2016-07-05 | James Blackwell | Dog step attachment for receiver hitch of pickup truck |
FI20155202A (en) * | 2015-03-24 | 2016-09-25 | Outotec Finland Oy | REMOVABLE WEAR BELT FOR A VACUUM BAND FILTER DEVICE |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3104223A (en) * | 1959-12-12 | 1963-09-17 | Nissan Chemical Ind Ltd | Vacuum-airtight arrangement for endless belt filter |
US4336139A (en) * | 1980-11-24 | 1982-06-22 | Envirotech Corporation | Vacuum pan raising and lowering system |
US4730526A (en) * | 1985-09-05 | 1988-03-15 | Gerber Garment Technology | Conveyorized vacuum table for feeding sheet material |
US20110266212A1 (en) * | 2008-12-30 | 2011-11-03 | Flsmidth A/S | Horizontal belt filter |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3117462A (en) * | 1958-08-01 | 1964-01-14 | Eimco Corp | Web aligning means |
US3675597A (en) * | 1969-05-20 | 1972-07-11 | Trygve R Oddsen | Table top support |
CA1033324A (en) * | 1974-08-26 | 1978-06-20 | Irving W. Shell | Upright and bracket arrangement |
US4065088A (en) * | 1974-08-26 | 1977-12-27 | Shell Irving W | Upright and bracket arrangement |
SE398972B (en) * | 1975-09-16 | 1978-01-30 | Nordengren Patenter | DEVICE FOR FILTER OF ROTARY BAND TYPE WITH A LONG-TERM VACUUM OUTLET UNDER THE BAND |
US4377480A (en) * | 1981-02-18 | 1983-03-22 | Pierson Henri G W | Vacuum belt filter |
US4483770A (en) * | 1982-09-27 | 1984-11-20 | Enviro-Clear Company, Inc. | Fluid film bearing for use in horizontal belt vacuum filters |
US7794605B2 (en) * | 2008-06-19 | 2010-09-14 | Flsmidth A/S | Horizontal belt filter with vacuum pan alignment |
-
2012
- 2012-11-02 EP EP12845167.1A patent/EP2782655A4/en not_active Withdrawn
- 2012-11-02 WO PCT/US2012/063323 patent/WO2013067352A1/en active Application Filing
- 2012-11-02 AU AU2012332260A patent/AU2012332260B2/en not_active Ceased
- 2012-11-02 CN CN201280065958.8A patent/CN104136089B/en not_active Expired - Fee Related
- 2012-11-02 US US14/355,663 patent/US8857626B1/en not_active Expired - Fee Related
- 2012-11-02 BR BR112014010672A patent/BR112014010672A2/en not_active IP Right Cessation
- 2012-11-02 JP JP2014540135A patent/JP2014534064A/en not_active Ceased
- 2012-11-02 KR KR1020147014491A patent/KR20140108224A/en not_active Application Discontinuation
- 2012-11-02 PE PE2014000634A patent/PE20141628A1/en not_active Application Discontinuation
- 2012-11-02 CA CA2854002A patent/CA2854002C/en not_active Expired - Fee Related
-
2014
- 2014-04-29 CL CL2014001117A patent/CL2014001117A1/en unknown
- 2014-05-02 ZA ZA2014/03199A patent/ZA201403199B/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3104223A (en) * | 1959-12-12 | 1963-09-17 | Nissan Chemical Ind Ltd | Vacuum-airtight arrangement for endless belt filter |
US4336139A (en) * | 1980-11-24 | 1982-06-22 | Envirotech Corporation | Vacuum pan raising and lowering system |
US4730526A (en) * | 1985-09-05 | 1988-03-15 | Gerber Garment Technology | Conveyorized vacuum table for feeding sheet material |
US20110266212A1 (en) * | 2008-12-30 | 2011-11-03 | Flsmidth A/S | Horizontal belt filter |
Also Published As
Publication number | Publication date |
---|---|
CA2854002A1 (en) | 2013-05-10 |
WO2013067352A1 (en) | 2013-05-10 |
JP2014534064A (en) | 2014-12-18 |
EP2782655A1 (en) | 2014-10-01 |
US8857626B1 (en) | 2014-10-14 |
ZA201403199B (en) | 2015-06-24 |
KR20140108224A (en) | 2014-09-05 |
BR112014010672A2 (en) | 2017-05-09 |
PE20141628A1 (en) | 2014-11-18 |
EP2782655A4 (en) | 2015-08-26 |
CN104136089A (en) | 2014-11-05 |
AU2012332260B2 (en) | 2014-06-26 |
CL2014001117A1 (en) | 2014-12-19 |
CA2854002C (en) | 2015-07-14 |
CN104136089B (en) | 2015-08-19 |
AU2012332260A1 (en) | 2014-05-22 |
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Owner name: FLSMIDTH A/S, DENMARK Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:WOOD, JOSEPH L;BREINHOLT, JAY;SIGNING DATES FROM 20140519 TO 20140611;REEL/FRAME:033312/0335 |
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Free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.) |
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Free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
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