Merry-go-round and see-saw powered water pumps
A couple of interesting rural technology nuggets on BoingBoing:
From the PlayPump web site:
The Play-Pump is capable of producing 1400 litres per hour at 16 rpm from a depth of 40m, and is effective up to a depth of 100m. A typical hand pump installation cannot compete with this delivery rate, even with substantial effort.
The Playpumps are specifically designed and patented roundabouts (1) that drive conventional borehole pumps (2), while entertaining children. The revolutionary pump design converts rotational movement to reciprocating linear movement by a driving mechanism consisting of only two working parts.
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To date OVER SIX HUNDRED installations have been completed, a large percentage of these installations are at primary schools. A partnership has been formed with the Department of Water Affairs and Forestry; Minister Buyelwa Sonjica has been vocal in her support and encouragement for the continued installation of this system in rural Africa.
Another link from the same post highlights the Gaviota eco-community project in Colombia, South America:
Tags: africa, south america, rural development, offgridA techno-tour of the llanos shows how Gaviotas has revolutionized life here. The most significant invention is a simple hand pump capable of tapping aquifers six times deeper than conventional models, but requiring so little effort that children can operate it. In normal pumps a heavy piston must be raised and lowered inside a pipe. Gaviotas engineers realized they could do the reverse; leave the piston stationary and lift an outer sleeve of lightweight, inexpensive PVC tubing instead.
In the open-air Gaviotas preschool, the children’s see-saw is actually a pump in disguise. As they rise and descend, water gushes from a vertical pipe into an open cement tank. Over the years Gaviotas technicians have installed these in thousands of school yards, using kid power to provide villages with clean water.
