Compressed Air Water Pump

Main > Water

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Research

http://www.hydromissions.com/products.htm

http://www.hydromissions.com/slapshotconstruction.pdf

From http://www.airwellpumps.com/HowDoesItWork.aspx :

Timer

COTS Commercial Off The Shelf timers

• http://www.grainger.com/Grainger/items/2A560
• http://www.groworganic.com/item_GP797_7Day_Digital_Timer.html

Arduino timer by Ralf

• http://factorefarm.org/content/compressed-air-water-pump#comment-238

Do it yourself el-cheapo timer

By mimarob

This is my first attempt at the wiki so I hope I will do this right.

If you are really looking for an el-cheapo solution and all you need to do is to turn a solenoid on and off at adjustable intervals, take a look at the 555 IC.

It is about $1.69 at Radioshack, then you need two potentiometers (turning knobs), and a handful of passive components, getting away with the uC and laptop altogether.

With the values in the schematics, we would get 2 seconds on and 6 seconds off when putting the knobs in the middle.

I don't know enough about triacs so I would probably go for an old-fashioned relay and a transistor to amplify the current for the coil and isolate galvanically.

The relay could then in turn be used to control the air-solenoid.

Always be careful both with high currents, high voltages and pressurized air!

I took most of the construction from:

http://www.kpsec.freeuk.com/555timer.htm

Another timer circuit design by Earthling

• http://factorefarm.org/content/compressed-air-water-pump#comment-236

File:Timercurcuit.pdf

Solenoid valves

• http://export.farnell.com/camozzi/a331-1-c2-a7d/solenoid-valve-110vac/dp/285080

Design 1

BOM

• 2' x 2" PVC pipe
• 2" flat PVC cap
• 2" Spigot x 3/4" Fips [1]
  
• 3/4" male thread coupling
• 3/4" brass check valve
• 2 x 3/4" male threaded PVC plugs
• 2' x 3/4" PVC pipe
• 2 x 3/4" hoses long enough to go down the well

Construction

1. Ream out one 3/4" male threaded PVC plug with a 3/4" hole for the 2' x 3/4" pipe and attach them.
2. Drill two 5/8" holes in the flat PVC cap and tap them to 3/4" for the air in and water out 3/4" male threaded PVC plugs. Use plumbers tape and attach the plugs. Glue the PVC cap to the 2' x 2" pipe.
3. Remove the spring of the metal check valve like in the hydromissions slapshot instructions.
4. Glue the 2" to 3/4" plug to the other end of the 2' x 2" pipe, attach the 3/4" male threaded coupler and the 3/4" check valve.
5. Attach the hoses to the plugs with plumbers tape and clamps and test the pump.

Assembly Diagram

Katie's Work