Low Power Airlift Pump Explained (Pneumatic Ejector Pump aka Geyser Pump with Check Valve)

hi there so I received a few requests to explain in a little more detail my low powered air lift pump design so I made this presentation to do just that what you're seeing is a cross sectional view of the air lift pump I invented about a year ago it turns out it's actually called the pneumatic ejector pump patented in 1973 you'll note that it's very similar to a geyser pump the biggest difference in geyser pumps do not have this check valve at the bottom this ejector pump is comprised of five parts an enclosed chamber that can be pressurized a one-way valve to let liquid in a hold to let let air in and a spout for where the liquid will be purged out and an air siphon which allows the pump to refill so let me talk about how it works there really two stages a purge stage and a refill stage starting with the purge stage let's assume the chamber is completely full of water and to begin air is pumped into the chamber pressurizing it and as a result the one-way valve will be forced closed and the liquid will have no place but to be ejected out of the spout the volume of air will continue this place all the water inside the chamber and the amount of air that is pumped in is equivalent to the amount of water purged out next as the air travels down the chamber or should I say as the liquid level drops it will reach the bend in the air siphon at this point the air will creep around the bend and site the siphon will activate sucking out all of the air in one big gush if you look at this closely it's actually an automatic bell siphon flipped upside down and instead of siphoning water downwards it siphons air upwards due to the buoyancy of air the surrounding water so as the air gushes out the pressure in the chamber will decrease opening the one-way valve this will let water in and the chamber will refill until it gets to the inlet of the air siphon from at this point it will flood their siphon and plug it stopping the air siphoning effect from this point the air the pump will go back to state 1 and purge the liquid liquid out again and it'll keep going through the cycle until the air shut off I'd like to show you the actual unit now that I built here it is and let me show you the individual parts we have here as a Nalgene bottle I use these rubber grommets to interface the pipe into it what we have here is the automatic siphon that will siphon the air out this little 90 degree elbow I took from a shampoo bottle dispenser and just heated it up and Ben Tahir drilled the hole in the side of the pipe had this rubber grommet so I just stuck it in there this is a test tube that is concentric around this pipe here creating a bell siphon and I zip tied it on here I have four air inlet ports these are just one-way valves so air can be pumped in and can't escape this is not really necessary you can just use a tube because the air pump doesn't leak air and this is the one-way valve that I built all it is is just a marble inside these PVC unions so that's the marble there so it creates a seal there and then as the the water will go in it will lift up and I put a barbecue skewer through this pipe and when I push it together I prevents the marble falling out so that's it get the one-way valve the auto siphon pipe and the Chamber so thanks so much for watching if you like my videos please click like and subscribe if you have any questions please write them in the comment section below thanks for watching

Channel: Locke Lab

Views: 171,516

Rating: 4.8107529 out of 5

Keywords: Pump (Invention), Airlift Pump

Id: RccAa_qrPA8

Length: 5min 6sec (306 seconds)

Published: Mon Jun 29 2015