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Human-Powered Handpumps for Water Lifting

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Alan Stinchcombe said:

Communities that have formerly relied on spring water are often justifiably distrustful of open wells, because as Jane's brief mentions, an open well is vulnerable to accidental or deliberate contamination. A rubber bucket, where available, discourages placing the bucket on the ground, but the well remains open. Prof. Sandy Cairncross proposed a flexible hose hanging from the base of the bucket, and looping up to discharge through the well housing, but in the absence of an efficient and well maintained, low forward pressure, non return valve, the hose will drain down to the well’s water level when the bucket is lowered. The rise is then limited by the need for the volume of water required to refill the hose to be substantially less than the bucket’s capacity. For example, for a 20 m well, ½ inch garden hose would need 10 litres to refill it. In some localities, even VLOM pumps cannot be maintained for lack of spare parts and adequately skilled first and second line maintenance personnel. In such cases, a sustainable (sole or back up) solution would be to enable a windlass, rope and bucket to be operated within an enclosed well housing. To this end, I have developed a prototype of what I believe to be a novel solution. It consists of a slotted cylindrical mechanism for orienting the rising bucket so that, on arrival in the well-housing, the bucket's handle does not collide with an emptying mechanism. The emptying mechanism is a WC flushing siphon adapted to discharge over the side of the bucket. I would like to make contact with: - field workers who have already tackled this problem - field workers who would be interested in trialling the proposed solution - engineers who could suggest improved fabrication techniques, suitable for both DIY and small factory production I would therefore like to publish details of my prototype solution as a "Request For Comment". Please post a comment here or email me if you can offer an existing channel for publication. Alan Stinchcombe astinchcombe[AT]hotmail[DOT]com

Commented on: 2014-09-06 23:39:00

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Darren said:

What are your thoughts about this new hand pump machine? http://wellwaterboy.com/id88.html It operates the same pump cylinder system used for a 12 foot diameter windmill and pumps 6 gallons a minute. No hand pump in the world can do this!

Commented on: 2013-01-01 03:43:00

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Alan Stinchcombe said:

Communities that have formerly relied on spring water are often justifiably distrustful of open wells, because as Jane's brief mentions, an open well is vulnerable to accidental or deliberate contamination. A rubber bucket, where available, discourages placing the bucket on the ground, but the well remains open. Prof. Sandy Cairncross proposed a flexible hose hanging from the base of the bucket, and looping up to discharge through the well housing, but in the absence of an efficient and well maintained, low forward pressure, non return valve, the hose will drain down to the well’s water level when the bucket is lowered. The rise is then limited by the need for the volume of water required to refill the hose to be substantially less than the bucket’s capacity. For example, for a 20 m well, ½ inch garden hose would need 10 litres to refill it. In some localities, even VLOM pumps cannot be maintained for lack of spare parts and adequately skilled first and second line maintenance personnel. In such cases, a sustainable (sole or back up) solution would be to enable a windlass, rope and bucket to be operated within an enclosed well housing. To this end, I have developed a prototype of what I believe to be a novel solution. It consists of a slotted cylindrical mechanism for orienting the rising bucket so that, on arrival in the well-housing, the bucket's handle does not collide with an emptying mechanism. The emptying mechanism is a WC flushing siphon adapted to discharge over the side of the bucket. I would like to make contact with: - field workers who have already tackled this problem - field workers who would be interested in trialling the proposed solution - engineers who could suggest improved fabrication techniques, suitable for both DIY and small factory production I would therefore like to publish details of my prototype solution as a "Request For Comment". Please post a comment here or email me if you can offer an existing channel for publication. Alan Stinchcombe astinchcombe[AT]hotmail[DOT]com

Commented on: 2011-09-08 12:00:00

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