US3282226A - Air lift - Google Patents
Air lift Download PDFInfo
- Publication number
- US3282226A US3282226A US378745A US37874564A US3282226A US 3282226 A US3282226 A US 3282226A US 378745 A US378745 A US 378745A US 37874564 A US37874564 A US 37874564A US 3282226 A US3282226 A US 3282226A
- Authority
- US
- United States
- Prior art keywords
- pipe
- socket
- air
- pipe section
- liquid
- 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
- F04F1/18—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium being mixed with, or generated from the liquid to be pumped
Definitions
- streams of air are introduced into liquid standing in a vertical reach of pipe, where the pipe extends down into a pool of such liquid and has an open bottom end through which liquid may flow into the pipe.
- the liquid and air mixture resulting is lighter than the liquid in the pool, and thus the weight of the liquid in the pool forces liquid up through the pipe and produces flow. While such air lifts are relatively simple and have many advantages, a drawback common to many has been that they are prone to become clogged, and after such clogging are dificult to clean.
- an air lift operates best if there is intimate mixing of air with the liquid in the pipe, and such mixing is promoted if the passage of air int-o the pipe is by way of multiple fine streams of air.
- Small ports or apertures in the side wall of the pipe accommodate such air fiow, but such apertures, because of their size, and particularly if liquid mixtures containing solids are handled, render the lift susceptible to clogging. The problem becomes more acute in systems where the air lift is operated intermittently, and back flow of liquid into the apertures occurs periodically.
- a general object of this invention is to provide a novel form of air lift, which features a detachable pipe section (containing apertures or other air flow means for introducing air to the liquid handled) which is easily removed to facilitate cleaning.
- the invention concerns an air lift, including a removable pipe section with means to accommodate the flow of air inwardly through the sides thereof, and means around the outside of this pipe section which ordinarily remains in place and defines a chamber for the supply of air to the periphery of the pipe section.
- a seal provided between this last-mentioned means and the pipe section, is broken open on removal of the pipe section for cleaning purposes.
- the air lift may comprise an outer fixed part, also referred to herein as a socket, having open top and bottom ends, which receives the perforated bottom end of a removable pipe section and funnels fluid into this perforated end.
- Novel means around the top of the socket seals the socket to the outside of the removable pipe section, which seal is broken open by lifting the removable pipe section out of the socket.
- the removable pipe section may readily be dropped back into the socket to reassemble the air lift in proper operating condition.
- FIG. 1 is a side elevation of portions of a fluid-handling system constructed according to an embodiment of the invention
- FIG. 2 is an enlarged cross sectional view, illustrating an air lift in the fluid-handling system
- FIG. 3 is a cross sectional view, taken generally along the line 3-3 in FIG. 2.
- the air lift of the invention is particularly adapted for handling fluid mixtures where clogging presents a problem.
- a sewage treatment plant exemplifies a specific application for the air lift, as sewage in addition to water contains large amounts of solid and semisolid material. While the invention is described in connection with such a plant, it should be understood that this is for reasons of illustration only.
- 10 indicates a portion of a tank in a sewage treatment plant, such tank including a bottom 12 and a wall 16 dividing the tank into two compart-' ments or chambers.
- a compartment 18 on the right of wall 16 comprises a settling compartment, and for the purpose of this description, it will be assumed that it is desired to transport liquid from this compartment and deposit it to the left of wall 16 in a compartment 19. Also for purposes of this description, it will be assumed that the level of liquid in compartment 18 normally is approximately at the level indicated at 20.
- a sewage treatment plant of the general type described above is more fully disclosed in a copending application entitled Apparatus for Producing Gas-Liquid Mixtures, filed on the same date as this application.
- Fluid is carried from compartment 18 to compartment 19 by a conduit 22, which includes a vertical pipe section 24, a horizontal pipe section 26, open at end 2611, and an elbow 28 connecting the two pipe sections.
- Vertical section 24 is open at the bottom end thereof, as shown in FIG. 2 at 24a.
- the air lift which produces flow upwardly in vertical pipe section 24 and thence out section 26 is shown generally at 30.
- the air lift it will be noted, is located well below the normal level of liquid in compartment 18, adjacent the base of pipe section 24. With air admitted by the air lift to liquid in pipe section 24, the liquid air mixture resulting above the air lift is lighter than the liquid in compartment 1-8, and the weight of the liquid in this compartment forces liquid upwardly in pipe section 24 and thence outwardly through pipe section 26 into compartment 19.
- the air lift comprises what is referred to herein as an outer pipe section, shell, or socket 34 normally mounted in a fixed position adjacent the base of the tank.
- a bracket 36 is shown fastened to wall 18 of the tank which is also fastened to the socket and supports the socket.
- Socket 34 is open at opposite ends, i.e., ends 34a and 34b.
- Top portion 34c of the socket has a larger diameter than bottom portion 34d, and intermediate the ends of the socket a ledge 38 is formed which constitutes means extending radially inwardly on the inside of the socket forming a sea-t.
- Pipe section 24 which extends into the socket has its open bottom end 24a adjacent ledge 38.
- annular chamber 40 Around the pipe section, and defined by the inside of the socket and the outside of the vertical pipe section is an annular chamber 40.
- a skirt 42 Integral with pipe section 24 and extending circumferentially thereabout, is a skirt 42, including around the perimeter thereof an axially extending flange 44. As shown in FIG. 2 with the parts in operative position, the flange extends downwardly over the outside of upper marginal portions of socket 34.
- a seal 46 Secured in any suitable manner to the underside of skirt 42, and interposed between the top of the socket and the skirt, is a seal 46.
- the top edge of the socket may be whereby a sealed relationship exists between the skirt and the top of the socket.
- a series of ports or apertures 50 extending through the wall of pipe section 24. These are distributed circumferentially about the pipe section and constitute air flow means through which air flows to the interior of the vertical pipe section from chamber 40.
- a supply pipe 54 Connected to socket 34 is a supply pipe 54 for supplying air from a suitable source of pressurized air to supply chamber 40.
- Supporting conduit means 22 including vertical pipe section 24 adjacentthe top of the tank is a notch 55 in wall 16. Pipe section 26 rests in this notch, with the sides and bottom of the notch cradling the pipe section.
- conduit means 22 including vertical pipe section 24 is lifted up with the lower end of pipe section 24 in the process drawing out of socket 34. With lifting up of section 24, the seal existing between skirt 42 and socket 34 is broken. Conduit means 22 may then be entirely removed from the tank, to enable a workman to clean the apertures or perforations of any sediment. After such cleaning, the conduit means is repositioned merely by dropping it downwardly into the tank, with the bottom end of vertical pipe section 24 fitting within the socket.
- the seal With the seal attached to the underside of skirt 42, the seal may be cleaned on removal of conduit means 22, and if necessary, replaced. Thus when cleaning of either apert-ures 50 or seal 46 is performed, there is no need to empty compartment 18 of its contents, nor is there any need to use tools to disconnect fittings at the location of the air lift.
- An air lift comprising a socket portion open at top and bottom ends,
- a pipe including a bottom end, which bottom end extends downwardly into said socket portion, said bottom end being removable through said open top of said socket portion,
- a removable pipe including a bottom end, which bottom end extends downwardly into the tank and into said socket portion, said bottom end being removable through said open top of said socket portion,
- air-supply means for supplying air to the inside of said socket portion.
- said socket portion has a beveled top edge
- said skirt portion has an axially extending flange around the perimeter thereof encompassing circumferential outer surface portions of said socket portion adjacent said beveled top edge
- said seal is attached to the underside of said skirt portion and is separated from said beveled top edge of the socket portion on removal of the bottom end of said pipe through the open top of said socket portion.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
Description
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US378745A US3282226A (en) | 1964-06-29 | 1964-06-29 | Air lift |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US378745A US3282226A (en) | 1964-06-29 | 1964-06-29 | Air lift |
Publications (1)
Publication Number | Publication Date |
---|---|
US3282226A true US3282226A (en) | 1966-11-01 |
Family
ID=23494380
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US378745A Expired - Lifetime US3282226A (en) | 1964-06-29 | 1964-06-29 | Air lift |
Country Status (1)
Country | Link |
---|---|
US (1) | US3282226A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3444821A (en) * | 1967-08-09 | 1969-05-20 | Bernard B Wolsh | Air-injector means for air-lift water pumps for removing scum or sludge from sewage treatment settling tanks |
US20120308407A1 (en) * | 2011-06-06 | 2012-12-06 | King Fahd University Of Petroleum And Minerals | Dual injection airlift pump |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US562266A (en) * | 1896-06-16 | And clifford shaw | ||
US2062799A (en) * | 1935-09-30 | 1936-12-01 | Sullivan Machinery Co | Air lift pumping apparatus |
US2144833A (en) * | 1936-11-02 | 1939-01-24 | Merla Tool Company | Well flowing apparatus |
US2730496A (en) * | 1953-06-04 | 1956-01-10 | Joseph L Zavod | Aquarium filter |
-
1964
- 1964-06-29 US US378745A patent/US3282226A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US562266A (en) * | 1896-06-16 | And clifford shaw | ||
US2062799A (en) * | 1935-09-30 | 1936-12-01 | Sullivan Machinery Co | Air lift pumping apparatus |
US2144833A (en) * | 1936-11-02 | 1939-01-24 | Merla Tool Company | Well flowing apparatus |
US2730496A (en) * | 1953-06-04 | 1956-01-10 | Joseph L Zavod | Aquarium filter |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3444821A (en) * | 1967-08-09 | 1969-05-20 | Bernard B Wolsh | Air-injector means for air-lift water pumps for removing scum or sludge from sewage treatment settling tanks |
US20120308407A1 (en) * | 2011-06-06 | 2012-12-06 | King Fahd University Of Petroleum And Minerals | Dual injection airlift pump |
US8596989B2 (en) * | 2011-06-06 | 2013-12-03 | King Fahd University Of Petroleum And Minerals | Dual injection airlift pump |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ROPER INDUSTRIES., INC., P.O. BOX 269., COMMERCE, Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:CORNELL MANUFACTURING CO.;REEL/FRAME:004031/0432 Effective date: 19820817 |
|
AS | Assignment |
Owner name: FIRST NATIONAL BANK OF CHICAGO THE, Free format text: SECURITY INTEREST;ASSIGNOR:ROPER INDUSTRIES, INC., A CORP OF DE.;REEL/FRAME:004498/0717 Effective date: 19841011 |
|
AS | Assignment |
Owner name: BANK SOUTH, N.A., 55 MARIETTA STREET, ATLANTA, GEO Free format text: SECURITY INTEREST;ASSIGNOR:FIRST NATIONAL BANK OF CHICAGO, THE;REEL/FRAME:004663/0381 Effective date: 19861209 |
|
AS | Assignment |
Owner name: ROPER INDUSTRIES, INC., A DE. CORP. Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:FIRST NATIONAL BANK OF CHICAGO, THE,;REEL/FRAME:004802/0561 Effective date: 19861231 Owner name: ROPER INDUSTRIES, INC., A DE. CORP.,STATELESS Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:FIRST NATIONAL BANK OF CHICAGO, THE,;REEL/FRAME:004802/0561 Effective date: 19861231 |
|
AS | Assignment |
Owner name: CORNELL PUMP COMPANY, OREGON Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CORNELL PUMP MANUFACTURING CORPORATION;REEL/FRAME:014822/0056 Effective date: 20031128 Owner name: ROPINTASSCO 2, LLC, GEORGIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CORNELL PUMP COMPANY;REEL/FRAME:014815/0949 Effective date: 20031128 Owner name: ROPINTASSCO HOLDINGS, L.P., GEORGIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ROPINTASSCO 2, LLC;REEL/FRAME:014797/0773 Effective date: 20031128 |