EP3060806A1 - Mécanisme de pompage pouvant être adapté à la taille utilisant un empilement de poly-diaphragmes anti-synchronisés - Google Patents

Mécanisme de pompage pouvant être adapté à la taille utilisant un empilement de poly-diaphragmes anti-synchronisés

Info

Publication number
EP3060806A1
EP3060806A1 EP14852826.8A EP14852826A EP3060806A1 EP 3060806 A1 EP3060806 A1 EP 3060806A1 EP 14852826 A EP14852826 A EP 14852826A EP 3060806 A1 EP3060806 A1 EP 3060806A1
Authority
EP
European Patent Office
Prior art keywords
diaphragm
diaphragm pump
pump according
drive
plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP14852826.8A
Other languages
German (de)
English (en)
Other versions
EP3060806A4 (fr
Inventor
Andrew C. ELLLIOTT
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Checkpoint Fluidic Systems International Ltd
Original Assignee
Checkpoint Fluidic Systems International Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Checkpoint Fluidic Systems International Ltd filed Critical Checkpoint Fluidic Systems International Ltd
Publication of EP3060806A1 publication Critical patent/EP3060806A1/fr
Publication of EP3060806A4 publication Critical patent/EP3060806A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/06—Pumps having fluid drive
    • F04B43/067—Pumps having fluid drive the fluid being actuated directly by a piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/04—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being hot or corrosive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/0009—Special features
    • F04B43/0054—Special features particularities of the flexible members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/06—Pumps having fluid drive
    • F04B43/073—Pumps having fluid drive the actuating fluid being controlled by at least one valve
    • F04B43/0736—Pumps having fluid drive the actuating fluid being controlled by at least one valve with two or more pumping chambers in parallel

Definitions

  • the present invention relates to pumps, and in particular to diaphragm type pumps.
  • Diaphragm pumps are known in the art, for example U.S. Patent Nos. 5,279,504 and 6,327,960 illustrate prior art diaphragm pumps.
  • U.S. Patent Nos. 5,279,504 and 6,327,960 illustrate prior art diaphragm pumps.
  • diaphragm pumps which are more economical to construct and offer improved performance characteristics.
  • One embodiment of the invention is a diaphragm pump including at least three body plates and at least two diaphragm assemblies positioned between the at least three body plates.
  • a series of drive fluid passages communicate with a drive side of the two diaphragm assemblies and a series of pumped fluid passages communicate with a pump side of the two diaphragm assemblies.
  • at least one of the body plates is a doubled faced plate having either drive fluid passages on both faces or pumped fluid passages on both faces.
  • Figure 1 is a cross-section of one embodiment of the diaphragm pump, including a reservoir and a driver.
  • Figure 2 is an exploded view of one embodiment of the diaphragm pump.
  • Figure 3 is an exploded view showing a drive fluid face of a body plate.
  • Figure 4 is an exploded view showing a chemical fluid face of a body plate.
  • Figure 5 is an enlarged view of one embodiment of the diaphragm assembly.
  • Figure 6 is a cross-section showing one example of a leak detection path.
  • Figure 7 is a first cross-section of the Figure 1 diaphragm pump illustrating the drive fluid passages.
  • Figure 8 is a second cross-section of the Figure 1 diaphragm pump illustrating the pumped fluid (or chemical) passages.
  • Figures 9A to 9C illustrate one embodiment of a pressure gauge assembly.
  • Figure 10 is a cross-section of an alternative embodiment of the diaphragm pump.
  • Figure 1 illustrates one embodiment of the present invention, the diaphragm pump 1.
  • the diaphragm pump is illustrated being used in combination with fluid reservoir 80 and driver or motor 100, but neither the motor, nor the reservoir need form part of the present invention.
  • the motor 100 seen in Figure 1 is a pneumatic, pilot valve controlled motor such as disclosed in U.S. Patent No. 6,736,046, Pilot Control Valve Utilizing Multiple Offset Slide Valves, which is incorporated by reference herein in its entirety.
  • Motor 100 includes the pilot valve 101 which controls pressurized air driving piston 102 in a reciprocating manner.
  • Piston stem 103 transmits the reciprocating force to the equipment being driven by motor 100.
  • the u-cup seal 104 prevents the loss of air pressure from around piston stem 103 to the exterior of motor 100. While the illustrated motor is a pilot controlled pneumatic motor, virtually any motor providing reciprocating motion, whether pneumatic, hydraulic, electric, or otherwise, could be employed.
  • the illustrated embodiment of fluid reservoir 80 is formed of a reservoir body 83 which includes a fluid space 88, a drive side 82 which makes a sealed connection with motor 100, and a pump side 81 which makes a sealed connection with diaphragm pump 1.
  • This embodiment of reservoir body 83 further includes the vent plug 86 and drain plug 87. Vent plug 86 allows the fluid in the fluid space 88 to remain at the exterior ambient pressure (e.g., atmospheric).
  • Extending through reservoir body 83 is plunger 90. On one end, plunger 90 is connected in a conventional manner (e.g., mating threads) to the piston stem 103 of motor 100.
  • the quad-ring seal 93 acts to prevent movement of fluid from reservoir space 88 into motor 100's interior.
  • the end of plunger 90 opposite piston stem 103 engages and is sized to move within the drive fluid passage 85 formed in reservoir body 83.
  • This end of piston stem 103 includes the center passage 92 which is open to the end of plunger 90 and extends into plunger 90 at least as far as the series of radial passages 91 which extend transversely through the diameter of plunger 90.
  • the drive fluid is an oil such as a conventional hydraulic fluid or a mineral oil.
  • the embodiment of diaphragm pump 1 seen in Figure 1 generally comprises a series of body plates 5 with diaphragm assemblies 50 positioned between the body plates.
  • Figures 2 and 7 better illustrate how this embodiment includes four body plates 5A to 5D.
  • a series of bolts 38 pass through apertures 39 in body plate 5A to 5C, engage threaded apertures in body plate 5D, and secure the body plates together.
  • the body plates 5 may be constructed of any material suitable to the pressure and corrosive conditions of anticipated use.
  • certain body plates exposed to corrosive fluids are constructed of a corrosion resistant material (e.g., 316 stainless steel) while other body plates exposed only to drive fluid may be constructed of a stronger and/or less expensive material (e.g., 4140 steel).
  • the body plates 5 will typically have a series of internal passages (described in detail below) allowing fluid to move between the perimeter area 6 of the body plate to at least one face 7 of the body plate.
  • a first fluid or a "drive" fluid will act on one side of the diaphragm(s) to cause displacement of the diaphragm.
  • the drive fluid originates in reservoir 80 and is placed under pressure by plunger 90.
  • a second fluid or a "pumped” fluid is moved through the pump by displacement of the diaphragm.
  • the pumped fluid is the fluid being employed in the chemical, industrial, or other process utilizing the pump.
  • drive fluid side When referring to a side of a diaphragm or a face of a body plate exposed to drive fluid, this may be described as the "drive fluid side" of the diaphragm or body plate.
  • the side of a diaphragm or a face of a body plate exposed to pumped fluid may be sometimes described as the "pumped fluid side” of the diaphragm or body plate.
  • the pumped fluid is typically a chemical composition, the pumped fluid side is more often simply referred to as the "chemical side" of the diaphragm or body plate face.
  • Figure 10 illustrates a slight modification to the embodiment seen in Figure 1.
  • the plunger 90 is solid, i.e., does not have the center passage 92 or the radial passages 91 formed in the plunger. Rather, the radial passage 91 in Figure 10 is placed through the section of the reservoir wall forming drive fluid passage 85.
  • the Figure 10 embodiment illustrates the addition of a replaceable bushing 105 between plunger 90 and the interior wall of drive fluid passage 85.
  • replaceable bushing 105 is formed of a material such as steel or a ceramic.
  • Figure 7 is a cross-section illustrating a series of internal passages in the body plates 5 on the drive fluid side 9 of the body plates.
  • body plate 5B is seen having a co- planar passages 12 (i.e., passages generally in the plane of the plate) on each face and traverse passages 13 passing though the plate generally perpendicular to the co-planar passages.
  • body plate 5D has the main drive fluid inlet 34 (which joins with the drive fluid passage 85 of reservoir 80 as seen in Figure 1 ), a short transverse passage 13, and a co-planar passage 12 for further distributing drive fluid to other body plates.
  • FIG. 7 further illustrates how the tubular connector bushing 22 forms part of a transverse passage 13 traversing body plate 5C.
  • Connector bushing 22 includes o-rings 23 and backup rings on each end which seal with body plates 5B and 5D.
  • connector bushing 22 is one example of an efficient manner to establish a fluid path through body plate 5C, there are of course other conventional techniques for creating such a sealed fluid path.
  • the diaphragm assembly includes three separate diaphragm "layers" (i.e., separate individual diaphragms), chemical side diaphragm layer 51 , center diaphragm layer 52, and drive side diaphragm layer 53. Additionally, the strainer plate 54 is positioned against the drive side diaphragm layer 53. The strainer plate serves at least two primary functions. First, it tends to more evenly distribute the pumped fluid. Second, it provides a more robust surface for sealing against the o-ring 57 (see Figure 7) on the pumped fluid face 8 of the body plates.
  • strainer plate 54 has a flat side abutting against the body plate and a slight concave curvature abutting the diaphragm layers.
  • Figure 4 suggests how strainer plate 54 includes a series of apertures 55.
  • Figure 3 shows the opposite face of strainer plate 54 seen in figure 4.
  • Figure 3 illustrates a web of grooves 56 which communicate with apertures 55 and act to distribute drive fluid across the face of strainer plate 54 which rests against diaphragm layer 53.
  • Figure 3 also illustrates a series of annular sealing grooves 58 formed near the perimeter of strainer plate 54. These sealing grooves 58 are best seen in the detail of Figure 6.
  • each diaphragm layer is an approximately 10 mil thick sheet of 316 stainless steel.
  • the diaphragms could be made of any number of suitable materials, including as nonlimiting examples, steel or an elastomer material.
  • Diaphragm assembly 50 could alternatively be formed of one, two, or more than three diaphragm layers.
  • strainer plate 54 is a 125 mil sheet of stainless steel with the above described apertures and grooves formed therein.
  • Figure 7 also illustrates a series of bleed passages 19 which have both a co-planar component and a transverse component within the body plates 5.
  • One end of the bleed passages are in fluid communication with either the drive fluid side of the diaphragm assembly or the chemical side of the diaphragm assembly, while the other end of the bleed passages terminate with bleed screws 75.
  • the bleed passages provide paths for air to be forced out of the pump when priming the pump (i.e., filling it with fluid) prior to commencing operation.
  • One preferred embodiment of bleed screws 75 include the bleed poppet 76 and biasing spring 77. The bleed poppet 76 and spring 77 function to provide slight resistance when air is being removed.
  • bleed passages are in communication with both the drive fluid side of the diaphragm assemblies 50 and the chemical side of the diaphragm assemblies 50 in order to allow air removal on both sides of the diaphragm assemblies.
  • FIG 8 is another cross-section of diaphragm pump 1 which illustrates the internal passages associated with the chemical side of the diaphragm assemblies 50.
  • the chemical or pumped fluid enters the diaphragm pump 1 via a one-way valve which is in this embodiment, check valve 41.
  • Check valve 41 is an "intake” or “inlet” valve in the sense that fluid can flow into pump 1 through this valve, but is blocked from flowing out of pump 1 through this valve.
  • this embodiment of check valve 41 is a poppet type check valve generally including the poppet and spring configuration of Figure 9C.
  • many other conventional or future developed one-way valves could be employed in the alternative.
  • the body plates 5A and 5C further have a series of distribution passages 18 communicating between the co-planar passages 16 and the chemical faces 30 of the body plates.
  • chemical faces 30 have a slight concave or inward (toward distribution passages 18) curvature.
  • the radius of curvature of the chemical face may be about 32 inches (i.e., a 32 inch radius of curvature).
  • the check valves form a means for allowing one-way fluid communication.
  • the diaphragm pump has a single inlet check valve 41 in body plate 5 A and a single outlet check valve 40 in a different body plate 5C.
  • other embodiments could have multiple inlet/outlet check valves in the same or different body plates.
  • the path from the inlet check valve, to the chemical side of the diaphragm assemblies, and to the outlet check valve, may be considered as the pumped fluid (or chemical fluid) passage.
  • FIG. 4 Another aspect of the illustrated embodiment is a diaphragm leak detection technique best understood viewing Figures 4 and 6.
  • Figure 4 suggests how diaphragm layers 52 and 51 have a leak detection aperture 62 as does body plate 5C.
  • a fluid path exists between diaphragm layer 51 and 52, through their apertures 62, and ultimately to the leak aperture 62 in body plate 5C.
  • This leak detection path is better seen in the cross-section of Figure 6.
  • the detail insert illustrates how fluid may travel between diaphragm layers 51 and 52 and ultimately into leak detection passage 67 in body plate 5C. As the leaked fluid fills passage 67, the increasing pressure will be registered by pressure gauge 65, thus notifying operators of a leak issue.
  • Figure 4 shows the alignment pin 64 engaging the diaphragm assemblies 50 and body plates 5 through the alignment apertures 63.
  • the alignment pins 64 ensure that the leak detection apertures through the diaphragm layers and into the leak detection passages of the body plates are all properly aligned.
  • pressure gauge 65 is seen in more detail in Figures 9A to 9C.
  • This pressure gauge 65 will include gauge stem 69 which houses poppet 70 biased in the closed position by spring 77. When pressure on poppet 70 is sufficient to overcome the force of spring 77, poppet 70 will be lifted and o-ring 72 moved out of the sealing position. Fluid may flow through poppet apertures 71 and the gauge stem 69 to act on the pressure sensing elements of the gauge.
  • a bleed screw 75 and ball 78 also engage valve stem 69. It can be seen how tightening of bleed screw 75 causes ball 78 to block the passage through bleed screw 75 and how loosening of bleed screw 75 would allow space for fluid to flow around ball 78 and out of the bleed screw.
  • the drive fluid in passage 85 is pressurized as plunger 90 moves toward pump 1.
  • the magnitude of the pressure imparted to the diaphragm assemblies is regulated by controlling the distance plunger 90 extends into fluid passage 85.
  • the end of plunger 90 threading into piston stem 103 allows rotation of plunger 90 to shorten or lengthen plunger 90 relative to piston stem 103, and thus plunger 90's travel into fluid passage 85.
  • the pressurized drive fluid is transmitted through co-planar passages 12 and transverse passages 13 to ultimately impart force against the drive fluid side of diaphragm assemblies 50.
  • the diaphragms 51 to 53 will flex toward the curvature 30 in the chemical face of the body plates. This pressurizes the fluid on the chemical side of pump 1 and will cause the discharge of a given volume of fluid from discharge check valve 40.
  • a lower pressure condition tends to be formed on the drive fluid side of pump 1 and the diaphragms 50 are pulled away from the chemical face of the body plates. This action lowers the pressure on the chemical side of pump 1 and will draw in a given volume of fluid through intake check valve 41.
  • the pump phase will then be repeated as plunger 90 transitions back to a power stroke.
  • the diameter of all the body plates is equal or approximately equal, as is the diameter of all the diaphragm assemblies.
  • this feature is not required for all embodiments.
  • the diameters of the body plates or diaphragm assemblies are considered approximately equal if they are within, alternatively 5%, 10%, or 20% of one another.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Abstract

L'invention porte sur une pompe à diaphragme, laquelle pompe comprend au moins trois plaques de corps et au moins deux ensembles de diaphragmes positionnés entre les trois ou plus de trois plaques de corps. Une série de passages de fluide d'actionnement communiquent avec un côté entraînement des deux ensembles de diaphragmes et une série de passages de fluide pompé communiquent avec un côté de pompe des deux ensembles de diaphragmes. En outre, un clapet de non-retour d'entrée communique avec la série de passages de fluide pompé et un clapet de non retour de sortie communique avec la série de passages de fluide pompé. Au moins l'une des plaques de corps est une plaque double face ayant soit des passages de fluide d'actionnement sur les deux faces soit des passages de fluide pompé sur les deux faces.
EP14852826.8A 2013-10-11 2014-10-10 Mécanisme de pompage pouvant être adapté à la taille utilisant un empilement de poly-diaphragmes anti-synchronisés Withdrawn EP3060806A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201361889899P 2013-10-11 2013-10-11
PCT/US2014/060077 WO2015054598A1 (fr) 2013-10-11 2014-10-10 Mécanisme de pompage pouvant être adapté à la taille utilisant un empilement de poly-diaphragmes anti-synchronisés

Publications (2)

Publication Number Publication Date
EP3060806A1 true EP3060806A1 (fr) 2016-08-31
EP3060806A4 EP3060806A4 (fr) 2017-07-12

Family

ID=52809837

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14852826.8A Withdrawn EP3060806A4 (fr) 2013-10-11 2014-10-10 Mécanisme de pompage pouvant être adapté à la taille utilisant un empilement de poly-diaphragmes anti-synchronisés

Country Status (4)

Country Link
US (1) US20150104336A1 (fr)
EP (1) EP3060806A4 (fr)
AU (1) AU2014331733A1 (fr)
WO (1) WO2015054598A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114165434B (zh) * 2021-12-16 2022-11-01 浙江大农机器有限公司 一种用于高盐高腐蚀介质的柱塞泵及其密封结构

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1912202A (en) * 1931-06-26 1933-05-30 Trico Products Corp Fuel pump
US2260306A (en) * 1938-04-16 1941-10-28 Sullivan Machinery Co Pump
GB572023A (en) 1944-01-20 1945-09-19 Hydrautomat 1931 Ltd Improvements in reciprocating diaphragm fluid pressure engines operating diaphragm pumps
US3208664A (en) * 1963-08-09 1965-09-28 Bendix Corp Fluid compressor
US3551076A (en) * 1968-03-22 1970-12-29 Interpace Corp Tubular diaphragm pump
US5292235A (en) 1986-09-26 1994-03-08 Karl Eickmann Membranes and neighboring members in pumps, compressors and devices
IL83259A (en) * 1987-07-20 1992-05-25 D F Lab Ltd Disposable cell and diaphragm pump for use of same
DE3903049A1 (de) * 1989-02-02 1990-08-23 Uraca Pumpen Membranpumpe
EP0582628B1 (fr) * 1991-05-03 1997-01-22 REGIPUR Polyurethan-Anlagentechnik GmbH Membrane a couches multiples a conduit d'evacuation de fuites pour pompes a membranes
JPH062664A (ja) * 1992-06-22 1994-01-11 Nippon Soken Inc ダイアフラム式ポンプ
US5279504A (en) 1992-11-02 1994-01-18 Williams James F Multi-diaphragm metering pump
DE19901893C1 (de) 1999-01-19 2000-06-15 Ott Kg Lewa Membranpumpe mit hydraulisch angetriebener Membran
US20040136843A1 (en) * 2002-04-12 2004-07-15 Bayer Aktiengesellschaft Diaphragm pump
US6824364B2 (en) * 2002-09-20 2004-11-30 Rimcraft Technologies, Inc. Master/slave pump assembly employing diaphragm pump
JP2007120488A (ja) * 2005-09-27 2007-05-17 Alps Electric Co Ltd ダイヤフラムポンプ
SE0900233A1 (sv) * 2009-02-24 2010-08-25 Tetra Laval Holdings & Finance Membranpumphuvud för en homogenisator

Also Published As

Publication number Publication date
US20150104336A1 (en) 2015-04-16
AU2014331733A1 (en) 2016-05-19
WO2015054598A1 (fr) 2015-04-16
EP3060806A4 (fr) 2017-07-12

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