US3898018A - Pneumatic ejector - Google Patents
Pneumatic ejector Download PDFInfo
- Publication number
- US3898018A US3898018A US355622A US35562273A US3898018A US 3898018 A US3898018 A US 3898018A US 355622 A US355622 A US 355622A US 35562273 A US35562273 A US 35562273A US 3898018 A US3898018 A US 3898018A
- Authority
- US
- United States
- Prior art keywords
- vessel
- discharge pipe
- inlet opening
- liquid
- pipe
- 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.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F1/00—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped
- F04F1/06—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped
Definitions
- the ejector includes a vessel having a top cover secured thereto in an air tight manner.
- a vertical discharge pipe extends through the top cover into the vessel in an air tight manner.
- a U-tube positioned within the vessel with an end in fluid communication with the interior of the vessel, serves to control the operation of the ejector.
- a flapper type-check valve controls the entrance of liquid into the vessel through an inlet opening at the bottom of the vessel.
- An air inlet pipe extends through the top cover to continuously supply compressed air into the vessel.
- This invention relates to ejector type pumping units and more specifically to a hydraulically controlled pneumatic ejector for handling liquids containing solid material such as raw sewage or the like.
- Another object is to provide a hydraulically controlled pneumatic ejector for use in pumping raw sewage having only one moving part.
- a further object of the invention is to provide a hydraulically controlled pneumatic ejector which will continue operating when clogged with foreign matter.
- a still further object is to provide a hydraulically controlled pneumatic ejector having an inlet check valve which will continue operating when foreign matter holds the check valve open and will clear itself on the succeeding cycle.
- Another object is to provide a hydraulically controlled pneumatic ejector in which all internal piping is designed to be self-cleaning.
- an ejector unit which includes a housing or vessel having a top cover secured thereto in an air tight manner.
- a vertical discharge pipe extends through the top cover into the vessel in an air tight manner.
- a U-tube positioned within the vessel with one end in fluid communication with the discharge pipe and the other end in fluid communication with the interior of the vessel, serves to control the operation of the ejector.
- a flapper type check valve controls the entrance of raw sewage into the vessel through an inlet opening at the bottom of the vessel.
- An air inlet pipe extends through the top cover to continuously supply compressed air into the vessel and force sewage out the discharge pipe during the ejecting phase.
- Liquid entering and exiting the U-tube automatically switches the ejector between its ejecting phase and its filling phase.
- the positioning of the U- tube and the inlet opening with respect to the discharge pipe prevents solid particles from entering the U-tube and air from exiting from the inlet opening.
- FIG. 1 is an elevation, partially in section, of a some what diagrammatic representation of the pneumatic ejector of the present invention shown positioned within a sewage receiving wet well;
- FIG. 2 is a sectional view of an alternative inlet flapper valve arrangement.
- a pneumatic ejector constructed in accordance with the present invention is designated generally at 10.
- Ejector 10 is illustrated seated within a standard wet well 12, from which it pumps sewage received therein.
- a standard wet well 12 from which it pumps sewage received therein.
- the hereinbelow disclosed pneumatic ejector may be utilized in other environments which require the pumping of liquids containing solid material.
- Ejector 10 includes a rectangular housing 14 having a top cover I5 releasably secured thereto in an air tight relationship by bolts 16 so as to form an air tight vessel or tank 18.
- a substantially vertical discharge pipe 20 Extending into vessel 18 through cover 15 is a substantially vertical discharge pipe 20.
- the upper end of discharge pipe 20 is suitably attached to a coupling 22 which in turn is attached to an appropriate distribution pipe 23.
- the lower end of discharge pipe 20 extends into vessel 18 to a depth approximately equal to three-fourths the height of vessel 18.
- a U-tube or control tube 24 is formed within vessel 18 by a substantially horizontal pipe section 26, ninety degree connecting elbows 28, 30, and 32, and a pair of substantially vertical pipe sections 34 and 36.
- Pipe 26 has a first end 38 in fluid communication with discharge pipe 20 at a depth approximately equal to one-eighth the height of vessel 18, and a second end 40 attached to an upper end 42 of pipe 34 through elbow 28.
- the lower end 44 of pipe 34 is attached to elbow 30 which in turn is attached to elbow 32.
- the lower end 46 of pipe 36 is attached to elbow 32 and the upper end 48 extends upward to a level a short distance below cover 15.
- an air inlet connection 50 passing through an appropriate opening in top cover 15.
- An air inlet pipe 52 having a control valve 54 associated therewith, is secured at one end to connection 50 and at its other end to a conventional source of compressed air (not shown).
- Air inlet opening 60 is provided through the side wall of vessel 18 adjacent the lower edge thereof.
- an inlet flapper type control valve 62 con trols the passage of sewage from wet well 12 through inlet opening 60 into vessel 18.
- Control valve 62 is shown in solid lines in FIG. 1 in its closed position and in phantom lines in its open position.
- Control valve 62 includes a rubber gasket/hinge 64 which extends beyond the outer periphery of opening 60 in a closing relationship thereto along the inner surface of vessel 18.
- the upper edge of gasket 64 is secured to vessel 18 by mounting bolts 66 and retaining member 67.
- a metallic flapper disk 68 Secured to the inner surface of gasket 64 in horizontal alignment with opening 60 is a metallic flapper disk 68 having an outer periphery extending beyond the periphery of opening 60. Secured to the outer surface of gasket 64 in horizontal alignment with opening 60 is a metallic back-up disk 69 having an outer periphery contained within the periphery of opening 60. Mounting bolt 70 sandwiches gasket 64 between disks 68 and 69. Gasket 64, being of a flexible material, acts as a hinge point at the point between retaining member 67 and flapper disk 68 to swing gasket 64 between its closed position in contact with vessel 18 and its open position spaced from vessel 18.
- Control valve 80 is a wafer type check valve including a body 82 having horizontally aligned openings 83 and 84 formed therethrough.
- a clapper assembly 85 is pivotally mounted about a horizontal stem 86 for movement between a closed position having a closing relationship to opening 84 and an open position having a spaced relationship to opening 84.
- a valve seat 87 is formed around the periphery of opening 84 to receive an O-ring 88 to contact clapper assembly 85 when in its closed position.
- Control valve 80 is sandwiched between a mounting plate 90 and the side wall of vessel 18 by bolts 92 such that opening 83 is in horizontal alignment with opening 60 and an opening 94 in plate 90 is in horizontal alignment with opening 84.
- ejector In operation, ejector is immersed in a sewage receiving wet well 12 and the pressure of the sewage within wet well 12 moves control valve 62 to its open position to permit the passage of sewage into vessel 18 through opening 60.
- the liquid level within vessel 18 continues to rise past the level indicated at A, the liquid enters discharge pipe 20 and rises therein until it reaches the level indicated at B. At this point the liquid enters control tube 24 and seals the bottom portion of the U-tube 24.
- the continuous flow of pressurized air entering vessel 18 Prior to the sealing of U-tube 24, the continuous flow of pressurized air entering vessel 18 is directed through U-tube 24 into discharge pipe 20 and out of vessel 18 through distribution pipe 23. The sealing of U'tube 24 prevents this air from passing through U-tube 24 and thereby increases the pressure within vessel 18.
- control valve 62 Should control valve 62 get stuck in its open position by a solid particle, the liquid within vessel 18 would be forced back through valve 62 into wet well 12 until the seal in U-tube 24 is broken. Liquid from wet well 12 will then rush in through control valve 62 and flush out the solid particle and thereby permit the return to normal operation.
- Control valve 62 is positioned low enough in vessel 18 to prevent air from leaking out therethrough and disrupting service.
- the operation of alternative control valve 80 performs in substantially the identical manner as does control valve 62 and therefore will not be discussed in further detail.
- the hereinabove disclosed hydraulically controlled pneumatic ejector is a simple device, capable of handling solids. and tends to be self-cleaning if clogged.
- the only moving part is the inlet control valve, which is specifically designed to be self-cleaning to increase the reliability of the ejector. Foreign matter holding the inlet control valve in its open position does not prevent operation. and will be cleared on succeeding cycles. Removal of top cover 15 allows complete access to all internal piping.
- a hydraulically controlled pneumatic ejector for handling liquids containing solid material comprising:
- a vessel constructed in a substantially air tight manner for receiving liquid thereinto;
- a gas inlet pipe extending into said vessel through an upper portion thereof for supplying gas thereinto to pressurize said vessel, said inlet pipe being in communication with a continuous source of pressurized gas;
- a U-tube positioned within said vessel having a first vertical pipe section in fluid communication with said discharge pipe at its upper end and a second vertical pipe section in fluid communication with the upper portion of said vessel at its upper end, said first and second pipe sections being connected at their lower ends so as to define a substantially horizontal passageway therebetween, said U-tube serving to vent gas therethrough into said discharge pipe when not sealed by liquid confined therein and preventing the passage of gas therethrough when sealed by liquid confined therein; and
- an inlet opening through a lower portion of said vessel e. an inlet opening through a lower portion of said vessel, the top of said inlet opening being positioned below at least a portion of said substantially horizontal passageway; and at or below the lower most portion of said discharge pipe so as to permit the passage of liquid thereinto, said inlet opening having a control valve means associated therewith operable to permit and prevent the passage of liquid therethrough into said vessel dependent upon the pressure differential across said inlet opening.
- control valve means includes a clapper member pivotally mounted about a substantially horizontal axis to permit movement between an open position permitting the passage of liquid through said inlet opening and a closed position preventing the passage of liquid through said inlet opening.
- control valve means includes a wafer type flapper valve which is secured to said vessel adjacent said inlet openmg.
- said vessel includes a removable top cover to close off an opening in said vessel and said discharge pipe and said air inlet pipe extend through said top cover so as to permit access into said vessel upon removal of said top cover.
- a hydraulically controlled pneumatic ejector for pumping sewage from a wet well comprising:
- a vessel constructed in a substantially air tight manner positioned below the liquid level of said wet well, said vessel including a top cover member closing off an opening through an upper portion thereof;
- a gas inlet pipe extending into said vessel through said top cover for supplying gas thereinto to pressurize said vessel, said inlet pipe being in communication with a continuous source of pressurized gas;
- a U-tube positioned within said vessel having a first vent pipe section, the upper end of said first pipe in fluid communication with an upper portion of said discharge pipe and a second vent pipe section in fluid communication with an upper portion of said vessel at its upper end, said first and second pipe sections being connected at their lower ends so as to define a substantially horizontal passageway therebetween, said U-tube serving to vent gas therethrough into said discharge pipe when not sealed by liquid confined therein and preventing the passage of gas therethrough when sealed by liquid confined therein, said discharge pipe extending into said vessel to a level below the bottom of said U-tube; and
- said inlet opening through a lower portion of said vessel, the top of said inlet opening being positioned below at least a portion of said substantially horizontal passageway and at or below the lowermost portion of said discharge pipe, so as to permit the passage of liquid thereinto, said inlet opening having a flapper type control valve means associated therewith operable to to permit and prevent the passage of liquid into said vessel dependent upon the pressure differential across said inlet opening, said control valve means being positioned a sufficient distance below the bottom of said discharge pipe to prevent gas from escaping through said inlet opening.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
Description
Claims (8)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US355622A US3898018A (en) | 1973-04-30 | 1973-04-30 | Pneumatic ejector |
CA191,065A CA996817A (en) | 1973-04-30 | 1974-01-28 | Pneumatic ejector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US355622A US3898018A (en) | 1973-04-30 | 1973-04-30 | Pneumatic ejector |
Publications (1)
Publication Number | Publication Date |
---|---|
US3898018A true US3898018A (en) | 1975-08-05 |
Family
ID=23398154
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US355622A Expired - Lifetime US3898018A (en) | 1973-04-30 | 1973-04-30 | Pneumatic ejector |
Country Status (2)
Country | Link |
---|---|
US (1) | US3898018A (en) |
CA (1) | CA996817A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4844699A (en) * | 1984-04-06 | 1989-07-04 | Hoppmann Corporation | Submersible pump |
EP0402468A1 (en) * | 1988-03-01 | 1990-12-19 | Yuugen Kaisha PARASIGHT | Continuous perfusion apparatus utilizing aeration |
US20110049047A1 (en) * | 2009-09-03 | 2011-03-03 | Jeff Cumin | Gas sparger for an immersed membrane |
US8371826B1 (en) | 2008-09-02 | 2013-02-12 | George E. Johnson | Geyser pump |
US8876089B2 (en) | 2011-09-15 | 2014-11-04 | Zenon Technology Partnership | Method and apparatus to keep an aerator full of air |
US9364805B2 (en) | 2010-10-15 | 2016-06-14 | General Electric Company | Integrated gas sparger for an immersed membrane |
US9463419B2 (en) | 2012-01-09 | 2016-10-11 | General Electric Company | Pulse aeration for immersed membranes |
US10422735B2 (en) * | 2017-05-23 | 2019-09-24 | Piab Ab | Filter monitoring in pneumatic transport systems |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU237594A1 (en) * | В. М. Милехин | PNEUMATIC PUMP | ||
FR344984A (en) * | 1904-07-20 | 1904-11-18 | Desire Eugene Duterme Fils | Water lifting system at any height |
GB541953A (en) * | 1940-08-23 | 1941-12-18 | James Frankland Bolton | Means for lifting and delivering liquids |
-
1973
- 1973-04-30 US US355622A patent/US3898018A/en not_active Expired - Lifetime
-
1974
- 1974-01-28 CA CA191,065A patent/CA996817A/en not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU237594A1 (en) * | В. М. Милехин | PNEUMATIC PUMP | ||
FR344984A (en) * | 1904-07-20 | 1904-11-18 | Desire Eugene Duterme Fils | Water lifting system at any height |
GB541953A (en) * | 1940-08-23 | 1941-12-18 | James Frankland Bolton | Means for lifting and delivering liquids |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4844699A (en) * | 1984-04-06 | 1989-07-04 | Hoppmann Corporation | Submersible pump |
EP0402468A1 (en) * | 1988-03-01 | 1990-12-19 | Yuugen Kaisha PARASIGHT | Continuous perfusion apparatus utilizing aeration |
EP0402468A4 (en) * | 1988-03-01 | 1991-11-13 | Yuugen Kaisya Parasight | Continuous perfusion apparatus utilizing aeration |
US8371826B1 (en) | 2008-09-02 | 2013-02-12 | George E. Johnson | Geyser pump |
US9358505B2 (en) | 2009-09-03 | 2016-06-07 | General Electric Company | Gas sparger for an immersed membrane |
US20110049047A1 (en) * | 2009-09-03 | 2011-03-03 | Jeff Cumin | Gas sparger for an immersed membrane |
US9433903B2 (en) | 2009-09-03 | 2016-09-06 | Zenon Technology Partnership | Gas sparger for a filtering membrane |
US10471393B2 (en) | 2009-09-03 | 2019-11-12 | Bl Technologies, Inc. | Gas sparger for an immersed membrane |
US11219866B2 (en) * | 2009-09-03 | 2022-01-11 | Bl Technologies, Inc. | Gas sparger for an immersed membrane |
US9364805B2 (en) | 2010-10-15 | 2016-06-14 | General Electric Company | Integrated gas sparger for an immersed membrane |
US10173175B2 (en) | 2010-10-15 | 2019-01-08 | Bl Technologies, Inc. | Integrated gas sparger for an immersed membrane |
US8876089B2 (en) | 2011-09-15 | 2014-11-04 | Zenon Technology Partnership | Method and apparatus to keep an aerator full of air |
US9463419B2 (en) | 2012-01-09 | 2016-10-11 | General Electric Company | Pulse aeration for immersed membranes |
US10422735B2 (en) * | 2017-05-23 | 2019-09-24 | Piab Ab | Filter monitoring in pneumatic transport systems |
Also Published As
Publication number | Publication date |
---|---|
CA996817A (en) | 1976-09-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SMITH & LOVERLESS, INC., A CORP. OF KS. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ECODYNE CORPORATION;REEL/FRAME:003924/0764 Effective date: 19811008 |
|
AS | Assignment |
Owner name: MARINE MIDLAND BUSINESS LOANS, INC., MISSOURI Free format text: SECURITY INTEREST;ASSIGNOR:SMITH & LOVELESS, INC.;REEL/FRAME:005317/0138 Effective date: 19900401 |
|
AS | Assignment |
Owner name: BOATMEN S NATIONAL BANK OF ST. LOUIS, THE A NAT Free format text: SECURITY INTEREST;ASSIGNOR:SMITH & LOVELESS, INC. A CORP. OF KANSAS;REEL/FRAME:006024/0068 Effective date: 19920212 Owner name: SMITH & LOVELOSS INC. Free format text: RELEASE BY SECURED PARTY OF SECURITY AGREEMENT RECORDED AT REEL 5317 FRAME 138.;ASSIGNOR:MARINE MIDLAND BUSINESS LOANS, INC.;REEL/FRAME:006032/0076 Effective date: 19920212 |