WO2017192541A1 - Pompe pneumatique submersible avec prévention de décharge d'air - Google Patents

Pompe pneumatique submersible avec prévention de décharge d'air Download PDF

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Publication number
WO2017192541A1
WO2017192541A1 PCT/US2017/030574 US2017030574W WO2017192541A1 WO 2017192541 A1 WO2017192541 A1 WO 2017192541A1 US 2017030574 W US2017030574 W US 2017030574W WO 2017192541 A1 WO2017192541 A1 WO 2017192541A1
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Prior art keywords
pump
liquid
air
interior
valve
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PCT/US2017/030574
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English (en)
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Michael K. Breslin
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Individual
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Individual
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Priority claimed from US15/145,707 external-priority patent/US20170321724A1/en
Priority claimed from US15/583,866 external-priority patent/US11306742B2/en
Application filed by Individual filed Critical Individual
Priority to GB1819660.0A priority Critical patent/GB2565710B/en
Publication of WO2017192541A1 publication Critical patent/WO2017192541A1/fr
Anticipated expiration legal-status Critical
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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
    • F04F1/08—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 specially adapted for raising liquids from great depths, e.g. in wells
    • 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
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
    • F04F5/48—Control
    • F04F5/52—Control of evacuating pumps

Definitions

  • Pneumatically powered submersible pumps have been in use in many industries for many years for moving liquids from below ground or tanks to storage, treatment and/or disposal. Such pumps have the ability to move solids and operate in difficult
  • canister pumps have been and are used to move sewage from collection points, or lift stations, to the sewage treatment plants. They have also been used for underground environmental remediation where electricity was not desired or available or the environment required special materials that were not easily incorporated into electric pumps.
  • canister pump construction is fairly simple and their operation easy to understand. Such pumps can be operated and serviced with a minimal amount of training. Very few moving parts are in the pump, so they can be very reliable and easy to operate and service.
  • Compressed air is often preferred over electricity as the motive force for pumping such liquids when the liquid being pumped is flammable or the area in which the pump must operate, such as on an oil refinery, is susceptible to fire.
  • the fill and discharge cycles of such pumps are usually controlled using preset timer controls.
  • Submersible pneumatic pumps have been made with valves for allowing water to flow out of the bottom of the pump and remove what is above the water; see Edwards '546. They were not designed to prevent air from being pushed out of the pump discharge with liquid, nor do they do so.
  • Submersible pneumatic pumps have been made with float-actuated controls; see Ness '382, Breslin '405, and Breslin '494. These designs often necessitate rather large floats that require nearly the entire inside annular space of the pump. This is especially true with pumps being used to pump from wells where space is very limited. Such floats can be fouled by debris getting into the pump and thereby jamming the float or the air valves these floats operate. If material builds up on the pump wall or the float, the pump may not operate. The other moving parts in the pump can also be fouled. Aggressive liquids can attack the float and valve materials. Deposition of materials from the water, such as iron deposits, can jam the pump and necessitate frequent cleaning. Compressed air can facilitate the deposition of such material due to the oxygen compressed air introduces into the pump.
  • Casing-activated pumps (see Breslin '617, Breslin '314) have been designed to circumvent the need for an internal float to actuate pump air valves. Those casing- activated pumps with sliding seals for the casing can be fouled by deposits. Those with bellow seals have been found to need to operate within a relatively narrow pneumatic pressure range.
  • Pan ⁇ 75 shows a design for a large air/water separation tank that is filled via an external well pump.
  • Pan's design requires a vacuum pump on top of the tank to remove air from the tank and a third pump inside the tank to move the fluid from inside the tank. Also it requires three pumps to move water from a well. This system is designed to function outside of a well and so requires more equipment than is necessary for removing fluid from a well without air in the fluid.
  • Itaya shows a design for a large air/water separation tank. Itaya's tank is filled via an external pump. There is a floating ball in the discharge piping that prevents air from exiting with the water. Itaya shows an air outlet at the top of the tank. The pressure on the fluid leaving the tank is limited and determined by the height of the water inside the tank and/or imposed back pressure on the air exhaust. If the fluid discharge
  • a pneumatic submersible canister pump liquids can be safely moved from one place to another without the problem of compres sed air being discharged along with the liquid. Mixing compressed air with discharged liquids can create harmful and sometimes dangerous results.
  • This pump has a bottom-mounted inlet with a check valve for allowing liquid in, but not back out, and a top-mounted outlet with a check valve for allowing liquid out, but not back in.
  • the discharge pipe for the canister pump has a pipe tee at its b ase ins ide the pump, Qne end of the cross portion of the tee is attached to the bottom of the discharge pipe. The other end of the cross of the tee is attached to the inlet check valve.
  • the 90 degree branch of the tee has an L- shaped fitting attached.
  • the horizontal end of the L-shaped fitting is attached to the pipe tee on the bottom of the discharge pipe, while the vertical end faces upward with a cage, ball, and seat on its open end.
  • the ball has a lower specific gravity than water or any other liquid expected to enter the pump so that it floats on the liquid.
  • the ball is captive in the cage above the seat so it will reseat when the fluid level in the canister falls to the level of the floating ball seat.
  • the cage has almost all of its perforations near the base and a protective area for the ball in its upper area where the ball can float without being pulled down to the seat by discharging water.
  • One or more small perforations can be provided near the top of the cage for allowing air to escape from the protected area.
  • the protected area can be eliminated if the screened inlet to the air-exclusion valve is extended upward in the pump sufficiently away from the seat so the floating ball would not be entrained by discharging liquid and be pulled onto the seat until the water level nears the seat.
  • the floating ball closes off the discharge of fluid and air and thus no air can be pushed out of the pump with fluid.
  • the air-exclusion valve in combination with piping for allowing liquid flow to and/or from a discharge pipe in a pneumatic canister pump prevents compressed air and/or other gases that have entered the pump from being pushed up the discharge tube with the liquid in the pump, thus reducing turbulence in the liquid being discharged.
  • the arrangement also prevents compressed air and/or other gases that have entered the pump from being pushed up the discharge tube with the liquid in the pump thus reducing the chance that oxygen may mix with fumes from the liquids being pumped and other gases in the well which could result in a flammable or explosive mixture being created or hydrocarbons being released to the atmosphere.
  • canister pump can be used in combination with timers to eliminate air being discharged with the fluid being pumped. That allows existing timer systems to be used with the improved pump design. Further, it allows the controls to use only one timer instead of the two that are normally used, thus reducing costs since pneumatic timers can be much more expensive than typical air valves.
  • Landfills and other sites currently use down-well submersible pneumatically- powered pumps that use an internal float to trigger pneumatic valves to allow compressed air into and out of the pump and thus allow the pump to alternately fill with fluid from the well and discharge it elsewhere.
  • a pump is shown by Breslin '405.
  • Such wells can contain viscous fluids and/or dissolved and suspended materials in the fluid being pumped which drop out of suspension due to the exposure to compressed air in the pump. Viscous fluids and previously suspended solids or dissolved materials can be deposited on the inside of such pumps along walls that do not experience rapid flow of fluid.
  • the inside wall of the pump casing, the outer wall of the discharge tube and the surfaces of the internal float have been shown to be especially prone to such deposits and the adherence of viscous fluids.
  • the outer wall of the float is usually within a half-inch of the inner wall of the casing and the inner wall of the float is within a quarter-inch of the outer wall of the discharge tube, so the jamming of the float is not unusual.
  • Such a large float is necessary to operate the linkage and valving within the pump.
  • the internal float or valve mechanism of such a pump is jammed by such deposits or viscous fluids, the pump can fail and have to be removed from the well to be cleaned. This is costly to the operator in labor and possibly replacement parts.
  • the removal of the pump from a well can have additional costly results because the fluid removal from the well is halted and can result in a rise in groundwater level that allows contaminants below a refinery to flow elsewhere than the well, or the reduced production of valuable, energy- generating methane gas at a landfill due to rising fluid levels closing off well openings through which methane reaches the well.
  • the present pump herein uses no such large internal float and corresponding pneumatic valve triggering mechanisms as shown in Breslin '405.
  • embodiments use only check valves and piping in its interior. These are the two components that have been proven to be the most resilient in resisting deposits in submersible pneumatically-powered canister pumps. This is due to the rapid flow of fluid through them and the movement of the balls or flappers in the check valves. Both actions prevent the buildup of deposits and promote the removal of any deposits that happen to occur. Deposits can build up on the inner wall of the pump casing and the outer wall of the discharge tube to a substantial level without affecting the operation of the pump.
  • any floats shown in embodiments that trigger valves or switches are relatively small and can be arranged to have much greater clearances than those in pumps as shown in Breslin '405. They are also at the upper end of the pump and are only partly submerged during a relatively small portion of the fill and discharge cycles of the pump. Pumps as in Breslin '405 have some of the areas of small clearances mentioned above constantly submerged and others exposed to compressed air and fluid during every pump cycle. Such submersion and such air/fluid interfaces are often the cause of corrosion and build up.
  • the pump does not incorporate internal floats with physically connected pneumatic triggering mechanisms to instigate the fill and discharge pump cycles as shown in Breslin '405 and thus will not suffer from the same jamming failure problems of those designs.
  • Every embodiment is designed to close off fluid flow to discharge piping when the interior fluid level reaches the lower area of the pump, thus preventing air from discharging from the pump. This is not true of prior art canister pumps controlled by timer controls even if there is no build up ins ide the pump .
  • the vital functioning components of the embodiments that employ only check valves and piping inside the pump casing will not be adversely affected by build-up of viscous materials or deposits on the inner wall of the casing or outer wall of the discharge pipe. This is a significant advantage over pumps as shown in Breslin '405.
  • Fig 1 shows prior art schematic view of a typical bottom-loading prior-art submersible pneumatic canister pump with a two-timer pump control currently in use in many industries.
  • Fig 2 shows a schematic view of a bottom-loading submersible pneumatic canister pump with a two-timer pump control currently in use in many industries with the addition of an air-exclusion valve connected to the pump discharge pipe via a tee and 90 degree elbow fitting near the bottom of the pump.
  • Fig 3 shows a schematic view of atop-loading submersible pneumatic canister pump with a generic pump control with a Y-shaped fitting at the top of the pump holding the inlet and discharge check valves and with an air-exclusion valve connected via a U- shaped fitting on the bottom of the discharge pipe.
  • Fig 4 shows a pneumatic schematic of a control system with only one timer that can be used to operate a submerged submersible pneumatic canister pump containing an air- exclusion valve.
  • Fig 5 shows a schematic of an electric/pneumatic control and a submersible pneumatic canister pump with an electric float switch and an air-exclusion valve.
  • Fig 6 shows a schematic of a pneumatic control and a submersible pneumatic canister pump with a pneumatic float switch and an air-exclusion valve.
  • Fig 7 shows an offset section of the discharge pipe in the area of the air-exclusion valve for allowing the discharge pipe to be centered in the pump casing.
  • Figs 8A and 8B show air-exclusion valves configured radially for allowing the discharge pipe to be centered in the pump casing.
  • Figs 9 A, 9B and 9C show schematics of a pneumatic canister pump with an air- exclusion valve with a quick-passage check valve mounted in fluid connection in different operation modes.
  • the operation modes shown are during filling (Fig 9A), during discharge (Fig 9B) at the end of the discharge mode Fig (9C).
  • Fig 1 shows a typical prior-art pneumatic submersible canister pump currently used in many industries. Such a punip is inexpensive to make, usually only has two internal moving parts, is easy to understand and use and is very durable. The problems arise when the controls for the pump allow compressed air to pass out of the pump with the discharged fluid.
  • Pneumatic submersible canister pump 12 is submerged in exterior liquid 23 to be pumped. It consists of a sealed pump casing 11 with an upper and a lower end, an interior and exterior and an opening 13 for compressed air to enter and exhaust air to exit casing 11.
  • An inlet check valve 21 allows exterior liquid 23 to enter casing 11, but does not allow interior liquid to be discharged 24 to exit.
  • a discharge check valve 17 allows interior liquid 24 to exit casing 11, but does not allow discharged liquid 29 to enter.
  • a discharge pipe 15 extends from near the bottom of casing 11 up through the top of easing 11 with discharge check valve 17 attached at the upper end.
  • Liquid discharge hose 19 carries discharged liquid 29 from pump casing 11 to a discharge point, such as a liquid holding pond 20.
  • a two-timer pump control 16 supplied with compressed air from compressed air source 18, alternately pressurizes and exhausts the interior of pump casing 11. Such a pump is typically operated using two timers.
  • One timer controls the time to exhaust pressurized air from the interior of pump casing 11 to allow pump casing 11 to fill with interior liquid 24, while the other timer controls the time to pressurize the interior of casing 11 and force interior liquid 24 from inside casing 11.
  • a fill-time setting may be from 3 to 30 seconds or even longer.
  • the discharge time is usually in the same range.
  • a person skilled in pump design is able to initially select the most appropriate settings, depending upon the back pressure in liquid discharge hose 19, pump submergence, fluid flow, air pressure, the size of the pump, and other factors. These factors can vary site to site and even well to well and they can change over time.
  • the operating pressure for pumps on landfill sites typically ranges between 40 and 100 psi. However, the operating pressures can be higher for sites with deep water tables and/or high back pressure in liquid discharge lines 19. Clean Environment Equipment of Oakland, CA designed pneumatically-driven down-well pumps to operate at over 150 psi.
  • Discharge check valve 17 operates as inlet check valve 21 for allowing liquid flow to move in one direction only.
  • Crossbar 27 prevents ball 26 from traveling into discharge hose 19 and discharged liquid 29 is prevented from passing through discharge check valve 17 and entering pump casing 11 by ball 26, which rests on seat 28.
  • Fig 2 shows pneumatic canister pump with air-exclusion valve 86 in a bottom-loading configuration according to a first embodiment.
  • Pump 86 is submerged in exterior liquid 23 for the purpose of pumping such liquid out of its holding vessel (not shown), such as a well.
  • Pump 86 has an air-exclusion valve 33 and a fluid passage 39 for allowing interior liquid 24 to travel between discharge pipe 15 and air-exclusion valve 33.
  • Air-exclusion valve 33 consists of a floating ball 34 that has a density less than interior liquid 24; a floating ball seat 32; a screened floating ball cage 36; a protective cap 37 with air opening in protective cap 38.
  • Air-exclusion valve 33 is in fluid connection with discharge pipe 15 via a 90 degree elbow 31 and a tee 30. The other opening of tee 30 is attached to inlet check valve 21.
  • Two -timer pump control 16 and compressed air source 18 are the same as in FIG 1.
  • Pump 12 operates as follows: When the interior of pump casing 11 has a lower pressure than the hydrostatic pressure applied by exterior liquid 23 at inlet check valve 21., exterior liquid 23 enters pump casing 11 first through screened inlet 25 and then through inlet check valve 21. Check valve ball 26 lifts off seat 28 allowing flow into pump casing 11. Crossbar 27 prevents check valve ball 26 from traveling into pump casing 11. Interior liquid 24 travels through tee 30, fluid passage 39, and elbow 31 and flows up through opening in air-exelusibn valve ball seat 35. Interior liquid 24 carries floating ball 34 up into screened cage 36 and into protective cap 37, where it is shielded from liquid drag forces when interior liquid 24 is forced from the interior of easing 11.
  • Screened cage 36 confines floating ball 34 and allows floating ball 34 to move freely upward and downward and be directed toward seat 35 as the level of interior liquid 24 approaches air exclusion valve 33 when interior liquid 24 is being discharged.
  • Cap 37 has a small air opening 38 for allowing air to escape.
  • Interior liquid 24 flows out of screened cage 36 into easing 11. As interior liquid 24 ri ses in pump casing 11, the air inside pump casing 11 is exhausted through opening 13 and into air hose 14.
  • control 16 allows pressurized air supplied by compressed air source 18 to flow through air hose 14 and enter pump casing 11 through opening 13.
  • opening 13 constitutes an air passage means for allowing compressed air into pump casing 11 to pressurize the internal volume of pump casing 11.
  • ball 26 is forced onto seat 28, preventing interior liquid 24 from exiting through inlet check valve 21.
  • check valve 21 is a check Valve means for allowing exterior liquid 23 into pump casing 11, hut not allowing interior liquid 24 out.
  • Discharge check valve 17 acts like inlet check valve 21 to allow flow in only one direction in that ball 26 rises off seat 28 when interior liquid 24 flows in the direction from seat 28 to crossbar 27 and prevents discharged liquid 29 from flowing into casing 11 due to ball 26 resting on seat 28.
  • check valve 17 is a check valve means for allowing interior liquid 24 out of pump casing 11 and preventing discharged liquid from flowing into casing 11.
  • Air-exclusion valve 33 is an air exclusion means that prevents air from exiting pump 86 and mixing with discharged liquid 29. Since ball 34 resting on seat 32 prevents interior liquid 24 and compressed air from leaving casing 11, the air pressure in casing 11 increases toward that being delivered by compressed air source 18 unless compressed air is exhausted immediately. This increase in pressure is of little consequence in this embodiment, but will be shown to be of great use in subsequent drawing descriptions.
  • opening 13 constitutes an air passage means for allowing compressed air out of pump casing 11 to depressurize the internal volume of pump casing 11.
  • exterior liquid 23 is moved to another location such as holding pond 20.
  • Two-timer control 16 is a control means for pressurizing and exhausting the interior of casing 11.
  • >Immiscible liquids such as oil and water, are not churned together to form a suspension or dissolve the constituents of one into the other.
  • >Oxygen interaction with discharged liquid 29 is reduced so the formations of depositions from the oxygenation of dissolved and suspended minerals, such as iron, in discharged liquid 29 is reduced.
  • Such depositions can clog discharge pipe 15, foul discharge check valve 17, and clog discharge hose 19. If discharged liquid 29 contains volatile hydrocarbons, the introduction of oxygen may create a flammable environment.
  • check valves such as duckbill-type, swing-type and flapper-type can be used in place of some of the check valves shown herein as ball-type check valves.
  • Fig 3 Top -Loading Submersible Pneumatic Canister Pump With Air-exclusion valve
  • Fig 3 shows my submersible pneumatic pump in a top-loading embodiment submerged in liquid 23.
  • This embodiment is similar to that of Fig 2, except that inlet check valve 21 and discharge check valve 17 are both located in a Y-shaped fitting 42 attached to the top of discharge pipe 15.
  • Fitting 42 has a passage 44 below both inlet check valve 21 and discharge check valve 17.
  • Passage 44 allows interior liquid 24 to pass downward from inlet check valve 21 into discharge pipe 15 during the exhaust cycle of casing 11 and upward from discharge pipe 15 and out of discharge check valve 17 during the pressurization cycle of the interior of casing 11.
  • Discharge pipe 15 is fluidly connected with air-exclusion valve 33 via a U-shaped fitting 40.
  • Pump control 22 is shown as generic as it can be a two-timer control or one such as shown in FIG 4.
  • pump control 22 causes pressurized air supplied by compressed air source 18 to flow through air hose 14 and enter casing 11 through opening 13.
  • interior liquid 24 is forced back through opening 35, through U-shaped fitting 40, and up pipe 15.
  • Ball 26 is carried onto seat 28, preventing interior liquid 24 from exiting valve 21.
  • Interior liquid 24 in casing 11 is forced up and out of casing 11 through valve 17 and into hose 19.
  • ball 34 travels downward and eventually rests on seat 32, preventing interior liquid 24 and any compressed air from entering pipe 15.
  • the bottom of casing 11 is shown having a threaded opening 49 with threaded plug 51 sealing threaded opening 49. Threaded plug 51 can be removed and the outlet end of another inlet check valve 21 can be threaded into opening 49 to create a bottom-and-top-loading pump configuration. If only a bottom-loading configuration is desired, inlet check valve 21 can be removed from fitting 42 and attached at opening 49, Y-shaped fitting 42 can be removed from pipe 15, and outlet check valve 17 can be attached to the top of pipe 15.
  • the design is versatile.
  • Fig 4 shows a schematic of a circuit that comprises a control means to control the pumping from a submersible pneumatic canister pump 86 containing an air-exclusion valve 33.
  • air exclusion valve 33 consists of check valve consisting of a buoyant ball that closes off the discharge passage of fluids by descending with the surface of fluid inside pump 86 to reside on a seat when pump 86 is nearly empty of such fluids.
  • Pump 86 is submerged in exterior liquid 23. Pump 86 is constructed and operates the same as shown in FIG 2.
  • the control means for controlling submersible canister pump with air-exclusion valve 86 comprises compressed air source 18, regulator 52, cycle reset valve 60, pneumatic timer 72, spring return valve 82 and operable connected air lines 14, 56, 64, 68, 70, and 74.
  • the circuit includes compressed air source 18, variable air regulator 52 that provides a desired pressure that determines the start of the exhaust cycle, and cycle reset valve 60 which in this case is a two-position, three-way valve.
  • Valve 60 has biasing actuator 58 that is pressurized by air from regulator 52, and cycle reset actuator 62 that is pressurized by pump air hose 14 through air line 64.
  • Pressure gauge 54 reads the bias pressure applied to actuator 58.
  • a single pneumatic timer 72 is utilized in this design versus two timers such as used currently in the industry. Timer 72 is shown as pneumatic but can also be electric.
  • Pneumatic timer 72 delays pressurized air from passing to pump air valve actuator 76 until a desired time has expired. This allows time for canister pump 86 to fill. This time is typically adjustable from 1 to 30 seconds and is set based upon the particular parameters of the environment and pump use. For slow-flow operations, this time may be extended to many minutes. An electro-pneumatic timer can also be used for this purpose.
  • Back pressure regulator 78 maintains a pressure in the circuitry that is above the minimum operating pressure of all components. The available pressure for control components can be read on gauge 79 with valve 82 open to atmosphere. Back pressure regulator 78 and gauge 79 are not necessary if the operation of pump 86 does not lower the air pressure below the minimum operating pressure of the pneumatic components. Gauge 54 is not required once variable regulator 52 is set or if the regulator used is not variable, but factory preset.
  • pump air valve 82 is a three-way, normally closed, spring return valve and is positioned between pump valve air supply line 80 and pump air line 14. Valve 82 prevents compressed air from passing to pump air line 14 until actuator 76 is pressurized during the pressurization cycle phase of pumping. After the pressurization phase actuator 76 is depressurized, valve 82 again prevents air from passing to pump air line 14 and simultaneously exhausts pump air line 14. Actuator 76 is pressurized by the output of timer 72 via pneumatic timer output air line 74.
  • Compressed air source 18 supplies air through compressed air supply line 70 to regulator 52, cycle reset valve 60, pneumatic timer 72, and back pressure regulator 78.
  • Regulator 52 is set to a pressure that will allow discharged liquid 29 to be pumped to a desired destination, such as holding pond 20.
  • Air line 56 conveys this pressure to actuator 58 that controls cycle reset valve 60.
  • Cycle reset valve 60 passes compressed air through timer reset air line 68 to timer actuator port 71 until the air pressure at actuator 62, which is the pressure inside pneumatic canister pump with air-exclusion valve 86, is greater than the air pressure pressurizing actuator 58.
  • the controls begin operation when air line 70 is pressurized by compressed air source 18.
  • Regulator 52 supplies compressed air to actuator 58, which shifts valve 60 to pass air to timer actuator port 71. This initiates the preset exhaust cycle of timer 72.
  • no compressed air passes out of timer 72 to actuator 76, so valve 82 remains in exhaust position, allowing compressed air to exhaust from pump 86 via air hose 14. This allows submerged pump 86 to fill.
  • air-exclusion valve 33 is a float-sealing means for preventing compressed air from being discharged with interior liquid 24 from pump 86.
  • the pressure in hose 14 is transmitted via air line 64 to cycle reset actuator 62 of valve 60.
  • valve 60 shifts to exhaust the compressed air in air line 68, thus removing pressurized air from timer actuator port 71.
  • timer 72 to exhaust air from line 74, causing valve 82 to close and exhaust air from air hose 14 and pump 86.
  • This allows pump 86 to again fill.
  • cycle reset valve 60 shifts, allowing compress ed air to pas s again to timer actuator port 71. This air pressure then activates timer 72 to begin timing the exhaust cycle.
  • timer 72 has been described as normally closed and designed to delay output of compressed air until a predetermined time cycle is completed.
  • Timer 72 can also be normally open, so that it would pass air immediately upon being activated and shut off and exhaust the downstream air after a predetermined time cycle is completed.
  • pump air valve 82 would be a normally open, spring return, three-way pump air valve. The resulting pressurization and exhausting cycling of pump 86 would be the same.
  • Timer 72 and pump air valve 82 have been shown separately for the sake of clarity. Pump air valve 82, pump air valve sensor 76 and air line 74 could be eliminated if timer 72, which by design incorporates a three-way air valve, could pass sufficient compressed air to discharge pump 86 at a desired rate.
  • Suitable Air controls and valves are available from Clippard Instrument Laboratory, Inc. of Cincinnati, OH, and Norgren Inc. of Littleton, CO. Pneumatic timers are available from Parker Hannifin Corporation of Cleveland, OH, Impulse Automation (formally H. Kuhnke, Ltd.) of Andover, UK and Ingersol Rand in Dublin, Ireland. Electric timers with solenoid valves are produced by Allenair Corporation of Mineola, NY.
  • This pneumatic control is an improvement over current canister pump controls in the following ways:
  • the single timer used in the present embodiment controls only the exhaust cycle, not the pressure cycle. If the exhaust cycle is too long or too short, no problem is created, other than reduction in pump rate and some waste in compressed air.
  • a typical pump control for a canister pump both the exhaust and pressure cycles are controlled by timers. During the pressure cycle such a pump control will supply compressed air to the canister pump until the pressure timing cycle ends regardless if all fluid has been pushed from the canister pump. With such a pump controller compressed air can exit the pump along with the pumped fluid. The addition of an air-exclusion valve and fluid passages as presented herein prevents this from occurring.
  • the pressurization cycle is ended and the exhaust cycle is automatically begun without the chance of compressed air exiting with the liquid being pumped.
  • Typical canister pump controls rely on a timer setting to regulate the pressurization cycle. Variations in compressed air pressure, humidity and purity, ground water levels, and liquid back pressure can cause such settings to over or under pressurize the canister pump. When this happens compressed air can be introduced into the liquid stream and is wasted. The negative effects of this have been listed previously.
  • pneumatic, electro-pneumatic and electric component arrangements are capable of the same pressurization and exhaust cycling of a pump and are easily designed by those familiar with pneumatic circuitry.
  • One example of this would be the use of a normally open timer that immediately passes air when connected to a compressed air source in combination with a normally open three-way pump air valve.
  • Another example would be the elimination of the pump air valve and allow the timer to supply compressed air directly to the pump and exhaust compressed air from the pump. This is possible because timers by design incorporate three- way pneumatic valves to pass air downstream and exhaust air from downstream.
  • Fig 5 Electric/Pneumatic Control Schematic For Submersible Pneumatic Canister Pump With Air-exclusion valve and Float Switch
  • Fig 5 shows an electro-pneumatic system that can be used to control the pumping from a submersible pneumatically-driven canister pump with air-exclusion valve 86.
  • Pump 86 is submerged in exterior liquid 23.
  • Pump 86 is similar to the pump in Fig 2.
  • it has a float 101 with an internal magnet 99 that rides on a float guide 100 mounted near the upper end of the interior of pump 86.
  • Pump guide 100 contains an electric proximity switch 98 that operates when float 101 approaches the top of float guide 100.
  • magnet 99 constitutes a switch means that that causes electric proximity switch 98 to operate when float 101 is in proximity with electric proximity switch 98.
  • Float 101 with magnet 99, guide 100, and electric proximity switch 98 are shown internal to pump 86. These components can alternatively be located externally of pump 86.
  • the control system for pump 86 includes a low-voltage power source 103 and electric wires 105 that provides power to a pressure transducer 113, float switch 98, and electro-pneumatic three-way solenoid valves 102 and 112. Also included is compressed air source 18, a gauge 79 and a back pressure valve 78, pump air valve 82 with actuator 76, cycle reset valve 60 with actuators 62 and 58, and air lines 14, 80, 90, 104, 108, 111, and 114.
  • pump air valve 82 which in this embodiment is a three-way, spring-return valve, is positioned via spring bias to exhaust compressed air from air hose 14. This allows exterior liquid 23 to enter pump 86.
  • pump 86 When pump 86 is nearly full, float 101 rises on float guide 100 bringing magnet 99 in proximity to electric proximity switch 98 inside float guide 100, causing electric proximity switch 98 to operate.
  • the operation of electric proximity switch 98 causes solenoid valve 102 to open and connect air line 90 to air line 104.
  • air passes through solenoid valve 102 and through air line 104 to pressure actuator 58.
  • Actuator 58 shifts cycle reset valve 60, which in this embodiment is a two-position, three- way valve, to pass pressurized air through air line 108 to pump air valve actuator 76, causing pump air valve 82 to open.
  • Pump air valve 82 passes pressurized air through hose 14 to pump 86, forcing interior liquid 24 out of pump 86 and into discharge hose 19.
  • valve 102 As the level of interior liquid 24 falls in pump 86, float 101 falls to the bottom of float guide 100, returning proximity switch 98 inside float guide 100 to its original position. This causes valve 102 to close and exhaust the pressurized air in air line 104. This relieves pressure from actuator 58. Valve 60 remains in its shifted position until actuator 62 is pressurized. When the level of interior liquid 24 in pump 86 reaches air-exclusion valve 33, valve 33 closes to prevent air and interior liquid 24 from leaving pump 86, causing pressure in pump 86 and air hose 14 to rise. The pressure in air hose 14 is transmitted via air line 111 to transducer 113.
  • transducer 113 When sufficient pressure exists in air line 111, transducer 113 sends a signal to open solenoid valve 112, which passes compressed air to exhaust cycle actuator 62, causing cycle reset valve 60 to shift, since there is no pressure being exerted on actuator 58 from solenoid valve 102, exhausting pressurized air from line 108 and actuator 76. This closes pump air valve 82 and exhausts compressed air from air hose 14. This depressurizes pump 86, allowing exterior liquid 23 to again enter to begin the pumping cycle again.
  • the combination of pressure transducer 113, solenoid valve 112, cycle reset valve 60 and actuator 62 constitute a preset activation pressure means causing said compressed air to be exhausted from said sealed casing allowing exterior liquid 23 to be pumped to again enter pump 86.
  • Electric pressure transducers and electro -pneumatic valves are available through Omega Engineering Inc. of Stamford, CT. Float switches with electric proximity switches in their guide rods are available through Madison Company in Branford, CT.
  • Fig 6 Pneumatic Control Schematic For Submersible Pneumatic Canister Pump With Air-exclusion valve and Float Switch
  • Fig 6 shows a schematic of my design of a pneumatic circuit that can be used to control the pumping from a submersible pneumatic canister pump with an air-exclusion valve 86.
  • the combination of components shown can alternately pressurize and exhaust the interior of pump 86, which is submerged in exterior liquid 23, thus pumping exterior liquid 23 to another location.
  • This control comprises compressed air source 18, two-position three-way pump air valve 132 with actuators 134 and 136, variable regulator 52, gauge 54, cycle reset valve 60 with actuators 58 and 62 and air lines 14, 56, 64, 130, 131, 138, and 148.
  • back pressure regulator or back pressure gauge shown, since they may not be necessary if compressed air source 18 can supply sufficient pressure and flow of air.
  • Pump 86 is similar to that in Fig 2 with the exception that it has in addition float 142 with magnet 144 attached or riding on float guide 143.
  • Float 142 with magnet 144 float on interior liquid 24 and follows the level of interior liquid 24.
  • Float guide 143 is mounted near the upper end of the interior of pump 86.
  • pneumatic proximity switch 140 Located near the top of float guide 143 is pneumatic proximity switch 140 that pressurizes air line 138 when the level of interior liquid 24 rises, float 142 approaches the top of float guide 143 and brings magnet 144 in proximity to pneumatic proximity switch 140.
  • switch 140 exhausts the compressed air in air line 138 out of pneumatic proximity switch exhaust air line 148.
  • magnet 144 constitutes a switching means incorporated into float 142 that operates pneumatic proximity switch 140 when float 142 is in proximity with switch 140.
  • Float 142 with magnet 144, guide 143, and pneumatic proximity switch 140 are shown internal to pump 86. These components can alternatively be located externally of pump 86.
  • Compressed air source 18 supplies compressed air through air line 131 to pump air valve 132, regulator 52, cycle reset valve 60, and pneumatic proximity switch 140.
  • Regulator 52 is set to a pressure that will allow exterior liquid 23 to be pumped by pump 86 to a desired discharge location. That pressure is read on gauge 54.
  • compressed air source 18 When compressed air source 18 is connected to air line 131, compressed air flows from regulator 52, through regulated air line 56 to actuator 58, shifting reset valve 60 and causing air line 130 to exhaust and remove air pressure from actuator 134. If valve 132 is initially in exhaust mode, the air pressure in hose 14 will be exhausted and exterior liquid 23 can enter pump 86. When pump 86 is nearly full, float 142 will rise from float stop 146 and travel up float guide 142 to position magnet 144 close to pneumatic proximity switch 140, causing switch 140 to pass compressed air through air line 138. The compressed air in air line 138 pressurizes actuator 136, shifting pump air valve 132 to pass compressed air into hose 14 and pressurize the interior of pump 86. This moves interior liquid 24 out of pump 86.
  • valve 33 closes to prevent air and interior liquid 24 from leaving pump 86. This causes the air pressure in pump 86 and air hose 14 to rise. This pressure is transmitted via air line 64 to actuator 62.
  • cycle reset valve 60 shifts to allow compressed air to flow through air line 130 to actuator 134, shifting pump air valve 132 to exhaust air from air hose 14. This allows pump 86 to again fill.
  • regulator 52, cycle reset valve 60 and actuators 58 and 62 constitute a preset pressure sensing means causing said compressed air to be exhausted from said sealed casing allowing said liquid to be pumped to again enter said pump.
  • valve 132 is initially in position to pass compressed air to pump 86 through hose 14, pump 86 will not fill because the air inside is not able to leave via hose 14.
  • the first cycle will be a pressure cycle, once compressed air source 18 is connected to the system.
  • the air delivered to pump 86 through hose 14 will force interior liquid 24 that is in pump 86 out, lowering the level of interior liquid 24.
  • This will cause float 142 to move downward, in turn causing pneumatic proximity switch 140 to exhaust air line 138 and removing air pressure from actuator 136.
  • valve 33 will close, causing the pressure inside of pump 86 to rise.
  • Magnetically actuated proximity valves are available through Impulse Automation, Ltd., supra.
  • the pump control has no timers, thus reducing initial costs and maintenance.
  • the pump control contains only two air valves, which are normally more robust than other designs that include timers.
  • the pump and control system is totally pneumatic and thus no electrical source is required. Electrical power can be hazardous, especially in areas with possible flammable atmospheres or liquids, such as on a refinery.
  • control can be made very compact and relatively simple so assembly and maintenance costs are reduced.
  • pneumatic component arrangements are capable of the same pressurization and exhaust cycling of a pump and are easily designed by someone familiar with pneumatic circuitry.
  • Fig 7 shows an embodiment of discharge pipe 15 that can be used to make manufacturing and servicing of the pump 86 easier and less expensive by having the ends of discharge pipe centered within casing 1 1 , A portion of discharge pipe 15 is offset to accomplish this.
  • Air- exclusion valve 33 is constructed and operates as described in Figs 2 and 3.
  • Discharge pipe 15 is offset in the area of air-exclusion valve 33 to allow discharge pipe 15 to be aligned with casing centerline 152 above and below air-exclusion valve 33.
  • Offset section of discharge pipe 150 is connected to air-exclusion valve 33 via 90° elbow 31 creating fluid passage 39,
  • the advantage of offsetting discharge pipe 15 in the area of air-exclusion valve 33 is that it positions discharge pipe 15 in the center of casing 11 at the bottom and top of casing 11.
  • Offset section 150 can be made as a separate part and installed in a standard canister pump that would accommodate the extra section by merely shortening discharge pipe 15 or lengthening casing 1 1. Offset section 150 can be attached to discharge pipe 15 by threads, welding or other means.
  • Figs 8A and 8B Radial Air-exclusion valve
  • Fig 8 A and 8B show design which allows discharge pipe 15 to be centered in casing 11 without having to create an offset section as shown in Fig 7.
  • Fig 8 A shows a top view of an air-exclusion valve manifold block 160 that is bored at several locations Section line 188 indicates the plane on which Fig 8B is taken.
  • Air-exclusion valve manifold block 160 contains center bore 165. Bored radially inward around the exterior of air-exclusion valve manifold block 160 are s everal of radial cross bore 170. The extremity of each radial cross bore 170 contains threads 171. Several of small vertical bores- 183 are formed around the periphery of the upper face of block 160 with each concentrically located within one large vertical bores- 180. Each of the small bores 183 intersects a cross bores- 170, whieh intersects with center bore 165. The base of large bore 180 creates bail seat 185.
  • Fig 8B shows a sectioned side view of air- exclusion valve manifold block 160 in exploded assembly within pump casing 11,
  • a sectional view of threaded ball cage 215 is shown above mating threads 187 located at the upper end of large vertical bore 180.
  • Floating ball 220 is shown inside threaded ball cage 215.
  • Threaded ball cage 215 is shown with screen 218, threads 217, and protective cap 216 with air opening 197.
  • Threaded discharge pipe 162 is shown above mating threads 167 located at the upper end of center bore 165.
  • Threaded nipple 190 is shown below mating threads 169 in the lower end of Center bore 165 and above threaded coupling 195.
  • Threaded coupling 195 is secured and sealed in pump casing 11 through casing penetration 198.
  • Threaded inlet check valve 210 is shown in exploded view below mating threads 196 in threaded coupling 195.
  • Threaded plug 173 is shown adjacent to mating threads 171 located at the outer end of cross bore 170.
  • Center bore 165 passes through block 160 and has threads 167 and threads 169 located at the top and bottom ends respectively.
  • Radial cross bore 170 intersects with small vertical bore 183 and center bore 165, forming internal liquid passage 175 which permits interior liquid 24 to flow between center bore 165 and bore 183.
  • Large vertical bore 180 is concentric with small vertical bore 183 and does not extend sufficiently to intersect cross bore 170, thus forming ball seat 185.
  • Pump casing 11 is shown submerged in exterior liquid 23.
  • Threaded plug 173 is threaded into threads 171 at the outer end of bore 170 to seal the radial extremity of cross bore 170.
  • Discharge pipe 162 is threaded into threads 167 at the upper end of block 160.
  • the upper end of nipple 190 is threaded into threads 169 in the lower end of center bore 165.
  • the lower end of nipple 190 is threaded into the upper end of coupling 195 that passes through casing penetration 198 and is secured and sealed to casing 11.
  • Inlet check valve 210 is threaded into the lower end of coupling 195.
  • Cage 215 with ball 220 inside is threaded into threads 187 in the upper end of large vertical bore 180.
  • Ball 220 is of such a size as to easily travel in, out and within cage 215 to be able to rest on seat 185 and thus prevent interior liquid 24 from passing downward.
  • interior liquid 24 that has exited inlet check valve 210 passes up into bore 165 of block 160, into internal liquid passage 175 and up through bore 183 and bore 180, lifting ball 220 from seat 185, carrying ball 220 up into cage 215 and up into protective cap 222 that has air opening 197 to allow air to escape and permit ball 220 to enter protective cap 222.
  • interior liquid 24 flows through screen 218, down through cage 215, large vertical bore 180 and small vertical bore 183, through passage 175 and up discharge pipe 162 and out of casing 11.
  • Figs 9 A, 9B and 9C Pump With Air-exclusion valve And Quick Passage Check Valve.
  • Fig 9-A shows another embodiment that lengthens the time period between serving pump 86 for viscous and particulate deposits and build up- Pump 86 is submerged in exterior liquid 23. and fitted with air-exclusion valve 33 (similar to Fig 2 with the exception that protective cap 37 with air opening 38 is replaced with a quick-passage check valve 250).
  • Check valve 250 is mounted in fluid connection with air-exclusion valve 33 and air- exclusion valve 33 has a non-perforated area of exclusion valve 285 and an air- exclusion valve cross bar 270 above screened floating ball cage 36, Screened floating ball cage 36 and cross bar 270 prevent floating ball 34 from traveling out of air- exclusion valve 33.
  • Fig 9 A shows pump 86 in the exhaust mode, filling with interior liquid 24. Compressed air is being exhausted out of opening 13 into air hose 14.
  • Check ball 26 in outlet check valve 17 is held on seat 28 by fluid pressure in discharge hose 19, preventing discharged fluid 29 from entering pump 86 from liquid discharge hose 19.
  • Check ball 26 in inlet check valve 21 is up, off seat 28 allowing pump 86 to fill. Liquid travels up through check valve 21, then through passage 39, up through air-exclusion valve 33 where floating ball 34 has risen off seat 32 and is resting against cross bar 270 within the non- perforated area 285. Liquid flows up through inlet check valve 21 , through passage 39 then a portion flows through screened floating ball cage 36 and the remainder flows through check valve 250 where sinking ball 260 is up off seat 265, allowing interior liquid 24 to enter into the interior of pump casing 11.
  • Ball 260 is prevented from leaving check valve 250 by quick-passage check valve cross bar 267.
  • check valve 250 allows fluid to pass rapidly past floating ball 34 which is held against cross bar 270 and not allow viscous portions of interior liquid 24 and particles to cling to walls or become trapped in small passages.
  • the size of the openings in screened floating ball cage 36 can be chosen so the majority of interior liquid 24 will pass up through check valve 250. This structure allows floating ball 34 to rattle within air-exclusion valve 33 thus causing particles or any portion of interior liquid 24 which is viscous to be shaken off, move quickly around, and flow away from floating ball 34 and the interior of air-exclusion valve 33.
  • Such rattling is caused by the fluid dynamic drag of moving interior liquid 24 pulling floating ball 34 from one side to the other side of cross bar 270 causing floating ball 34 to bounce around the interior of air exclusion check valve 33. This action helps to keep the interior of air-exclusion valve 33 and the surface of floating ball 34 free from particles and inhibits any viscous portion of interior liquid 24 from clinging to such surfaces.
  • Such rattling can create vibrations throughout pump 86 thus helping to also keep clean other areas within pump 86. The same vibrations are created with the rattling of sinking ball 260 moving from one side to the other side of cross bar 267 as interior liquid 24 passes through check valve 250.
  • Fig 9B shows pump 86 in the pressurization mode, moving interior liquid 24 out from the interior of pump 86.
  • Compressed air from air hose 14 enters through opening 13 into the upper interior of pump 86 at a greater pressure than the static pressure exerted by discharged liquid 29 in discharge hose 19, forcing interior liquid 24 up discharge pipe 15 and through outlet check valve 17.
  • Check ball 26 in outlet check valve 17 is up, off of seat 28 allowing interior liquid 24 to exit pump 86.
  • Check ball 26 in inlet check valve 21 is on seat 28 preventing interior liquid 24 from flowing out of the interior of pump casing 11 through inlet check valve 21.
  • Sinking ball 260 sinks onto seat 265 between the end of the exhaust cycle and the beginning of the pressurization cycle of pump 86, thus preventing interior liquid 24 from passing into non-perforated area 285 where floating ball 34 is held via buoyancy against cross bar 270.
  • sinking ball 260 onto seat 265 allows floating ball 34 to remain in a quiescent area up against cross bar 270, protected within non-perforated area 285 of air- exclusion valve 33 from drag forces of interior liquid 24 as it flows.
  • Interior liquid 24 passes through screened area 36, through opening 35 in seat 32, through passage 39, up discharge pipe 15 and out of pump 86 through discharge check valve 17.
  • Discharge hose 19 carries discharged liquid 29 away from pump 86.
  • Fouling prevention, cleaning, and protective means are also provided as will be appreciated.
  • Said means are comprised of check valve 250 through which interior liquid 24 passes rapidly into the interior of pump 86 thus helping to prevent buildup of deposits and viscous portions of deposits and viscous portions of interior liquid 24.
  • the internal surfaces of air-exclusion valve 33 and surface of floating ball 34 are maintained clean of deposits and viscous portions of interior liquid 24 through the rapid flow of interior liquid 24 and the vibration of both floating ball 34 and sinking ball 260 during the rapid flow of interior liquid 24.
  • Check valve 250 also comprises a cleaning means by which the internal surfaces of air-exclusion valve 33 and the surface of floating ball 34 are maintained clean of deposits and viscous portions of interior liquid 24 through the rapid flow of interior liquid 24 and the vibration of both floating ball 34 and sinking ball 260 during the rapid flow of interior liquid 24.
  • the protective means is comprised of check valve 250 which closes during the discharge cycle of pump 86 and prevents floating ball 34 from being dragged via fluid dynamic forces down onto seat 32 thus preventing interior liquid 24 from exiting pump 86 before the level of interior liquid 24 inside pump 86 comes in proximity to air- exclusion valve 33. This is accomplished by preventing flu interior liquid 24 from passing through check valve 250 into air-exclusion valve 33 because sinking ball 260 is on seat 265 during the discharge cycle of pump 86.
  • Fig 9C shows pump 86 toward the end of the pressurization cycle with interior liquid 24 prevented from entering or exiting pump 86.
  • Interior liquid 24 has been sufficiently driven from the interior of pump casing 11 to cause the level of interior liquid 24 to travel down near air-exclusion valve 33.
  • floating ball 34 traveled downward due to the falling fluid level and entered screened floating ball cage 36 where it was carried to seat 32 thus preventing interior liquid 24 and any compressed air from leaving pump 86.
  • This embodiment allows rapid passage of interior liquid 24 around floating ball 34 during the fill cycle of pump 86 and prevent rapid flow of interior liquid 24 around floating ball 34 during the discharge cycle of pump 86.
  • the rapid influx keeps floating ball 34 and the interior of air-exclusion valve clean, while the protection of floating ball 34 from the flow of interior liquid 24 during the discharge cycle of pump 86 prevents floating ball 34 from being seated too soon which would prevent pump 86 from emptying sufficiently.
  • the air-exclusion valve in combination with piping for allowing liquid flow to and from a discharge pipe in a pneumatic canister pump prevents compressed air and other gases that have entered the pump from being pushed up the discharge tube with the liquid in the pump, thus reducing turbulence in the liquid being discharged.
  • one embodiment of the controls need only one timer instead of the two that are normally used, thus reducing costs since pneumatic timers can be much more expensive than typical air valves.
  • the controls need only one pneumatic timer instead of the two that are normally used, thus reducing possible problems because pneumatic timers are more prone to failure than most pneumatic air valves.
  • Timers are not required to operate submitted embodiments of submersible, pneumatically-driven canister pumps with an air-exclusion valve.
  • Compressed air pressure in the pump can be used to actuate the exhaust/fill cycle of the pump. As far as I know this ability is unique to the field.
  • the quick-passage check valve is novel and helps to eliminate areas where particles and viscous fluids could build up, causing the floating ball to stick in the raised location and prevent it from seating when the fluid level reaches the air-exclusion valve.
  • the various embodiments provide a pump and control system with one or more of the following advantages: novelty, economical, highly reliable, increased safety, reduction of maintenance for controls and downstream discharge equipment.
  • the various embodiments have the capacity to successfully pump liquid without air being introduced to the liquid discharge stream.
  • a pneumatic valve may be actuated instead of an electrical switch when used in combination with the float at the top of the pump.
  • pneumatic float switches are available from Kenco Engineering Co. of Tulsa, Oklahoma. Those skilled in the art will envision many other possible variations are within its scope. Accordingly the reader is requested to determine the scope by the appended claims and their legal equivalents, rather than by the examples given.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Check Valves (AREA)

Abstract

L'invention concerne un système de pompe de bidon pneumatique submersible, destiné à pomper un liquide depuis un réservoir ou un emplacement souterrain par incorporation d'une soupape à l'intérieur de la pompe afin d'empêcher l'air de sortie avec la décharge du liquide. La soupape à bille flottante est située à proximité de l'extrémité inférieure de la pompe et communique avec le tuyau de décharge. Lorsque le niveau de liquide s'approche de l'extrémité inférieure de la pompe, une bille de densité plus légère que le liquide repose sur un siège et empêche toute décharge supplémentaire du liquide et le passage de l'air hors de la pompe. Il est également possible d'utiliser plusieurs agencements de commande de pompe pour actionner la pompe et une soupape de retenue à passage rapide peut être utilisée pour améliorer le fonctionnement.
PCT/US2017/030574 2016-05-03 2017-05-02 Pompe pneumatique submersible avec prévention de décharge d'air Ceased WO2017192541A1 (fr)

Priority Applications (1)

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GB1819660.0A GB2565710B (en) 2016-05-03 2017-05-02 Submersible Pneumatic pump with air discharge prevention

Applications Claiming Priority (4)

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US15/145,707 2016-05-03
US15/145,707 US20170321724A1 (en) 2016-05-03 2016-05-03 Submersible pneumatic pump with air exclusion valve
US15/583,866 2017-05-01
US15/583,866 US11306742B2 (en) 2017-05-01 2017-05-01 Submersible pneumatic pump with air-exclusion valve

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023051804A1 (fr) * 2021-09-30 2023-04-06 Yunjing Intelligence Technology (Dongguan) Co., Ltd. Structure de pompe d'évacuation et station de base de nettoyage

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WO1995018685A1 (fr) * 1994-01-06 1995-07-13 Ricom Engineering Limited Appareil de recuperation de liquides
US5487647A (en) * 1994-10-19 1996-01-30 Breslin; Michael K. Pneumatically powered submersible fluids pump with casing activator and biasing means
WO1999064742A1 (fr) * 1998-06-11 1999-12-16 Marvel John E Pompe a liquides pour puits
US6027314A (en) * 1994-10-19 2000-02-22 Breslin; Michael K. Pneumatically powered submersible fluids pump with casing activator
US20030159828A1 (en) * 2002-01-22 2003-08-28 Howard William F. Gas operated pump for hydrocarbon wells
US20060045749A1 (en) * 2004-08-30 2006-03-02 Powermate Corporation Air compressor utilizing an electronic control system
US20120168030A1 (en) * 2011-01-04 2012-07-05 Ohm Patrick L Portable tire inflator and reflective device
US20130213026A1 (en) * 2010-09-15 2013-08-22 Kawasaki Jukogyo Kabushiki Kaisha Drive control method of operating machine

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Publication number Priority date Publication date Assignee Title
WO1995018685A1 (fr) * 1994-01-06 1995-07-13 Ricom Engineering Limited Appareil de recuperation de liquides
US5487647A (en) * 1994-10-19 1996-01-30 Breslin; Michael K. Pneumatically powered submersible fluids pump with casing activator and biasing means
US6027314A (en) * 1994-10-19 2000-02-22 Breslin; Michael K. Pneumatically powered submersible fluids pump with casing activator
WO1999064742A1 (fr) * 1998-06-11 1999-12-16 Marvel John E Pompe a liquides pour puits
US20030159828A1 (en) * 2002-01-22 2003-08-28 Howard William F. Gas operated pump for hydrocarbon wells
US20060045749A1 (en) * 2004-08-30 2006-03-02 Powermate Corporation Air compressor utilizing an electronic control system
US20130213026A1 (en) * 2010-09-15 2013-08-22 Kawasaki Jukogyo Kabushiki Kaisha Drive control method of operating machine
US20120168030A1 (en) * 2011-01-04 2012-07-05 Ohm Patrick L Portable tire inflator and reflective device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023051804A1 (fr) * 2021-09-30 2023-04-06 Yunjing Intelligence Technology (Dongguan) Co., Ltd. Structure de pompe d'évacuation et station de base de nettoyage

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GB201819660D0 (en) 2019-01-16
GB2587163B (en) 2021-11-10
GB2587163A (en) 2021-03-17
GB2565710B (en) 2021-01-20
GB202018413D0 (en) 2021-01-06

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