PauperPumper
Download the paper
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PauperPumper
This
design will pump water from shallow or deep wells. The pump cost
$3.60 at retail, single-piece pricing (17 Oct 2005). The tubing
and plunger costs depend, of course, on the depth of the well.
There are several options to close in the well head and route the
produced fluid.
There
are, of course, drawbacks and limitations. The ring seals will
eventually wear a hole in the barrel wall. The nail could deform
and allow the marble to seat, thereby restricting flow. The early
performance-to-price ratio is encouraging. Simplicity,
availability, longevity and so forth are likewise inviting.
Reviews,
field experience, optimizations, improvements and other comments are
welcomed and solicited.
Build
Plunger
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√
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Step
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Notes
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Drill
out the end of 0.50in plug (A)
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Cut
1.75in section (D) from 0.50in diameter, Sch40 pipe
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Drill
interference fit hole through the end of the pipe segment (D) and press
fit nail segment through end of the pipe segment. The nail
prevents the marble from seating on the end of the pipe segment on the
down stroke.
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Cut
3 rings (F) from 1.00in diameter Sch40 pipe and cut a 0.50in slot from
each ring. The ring serves as a friction fit seal to the inside
of the Barrel.
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Cut
24in section (G) from 0.50in diameter, Sch40 pipe
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Place
plug (A) into one end of coupling (C)
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Drop
marble (B) into coupling/plug assembly
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Capture
marble by placing nail-end of pipe section (D) into other end of
coupling (C)
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Place
coupling (E) onto non-nail-end of pipe section (D)
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Fit
pipe section (F) into other end of coupling (E)
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The
plunger is now complete
Build
Barrel
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√
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Step
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Notes
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Cut
2.00in section (Q) from 0.75in diameter, Sch40 pipe
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Drill
interference fit hole through the end of 1.00in-0.75in bushing (N) and
press fit nail segment through end of the bushing. The nail
prevents the marble from seating on the end of the bushing on the up
stroke.
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Place
coupling (N) over bushing (L)
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Drop
marble (M) into coupling/bushing assembly
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Fit
bushing (P) into other end of coupling (N)
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Fit
2.00in pipe section (Q) into open end of bushing (P)
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Place
bushing (R) onto pipe section (Q)
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Place
coupling (S) into bushing (R)
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Fit
pipe section (T) into other end of coupling (S)
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The
barrel is now complete
Build
Pump
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√
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Step
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Notes
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Fit
Plunger into Barrel.
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Compress
each of the rings while gently pressing the Plunger into the Barrel.
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Suggest
fitting threaded adapters to plunger and barrel ends. This allows
incremental installation and standardization.
Suggest
plunger T-handle with cap on one end; fluid produced out end of handle.
Bill
of Material
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Plunger
Assembly
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Part
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Qty
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Description
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Cost
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A
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1
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Plug, 0.50in
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0.17
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B
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1
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Marble, 0.625in dia
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0.01
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C
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1
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Coupling, 0.50in
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0.29
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D
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1.8
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Pipe, 0.50in x 1.75in
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0.02
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E
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1
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Coupling, 0.05in
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0.29
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F
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3
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Ring, 1in x 0.25in, w/
gap
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0.00
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G
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36
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Pipe, 0.50in
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0.46
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$1.24
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Barrel
Assembly
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Part
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Qty
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Description
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Cost
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L
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1
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Bushing, 1inx0.50in
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0.52
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M
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1
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Marble, 0.95in dia
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0.01
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N
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1
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Coupling, 1.00in
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0.33
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P
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1
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Bushing, 1inx0.75in
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0.43
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Q
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2
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Pipe, 0.75in
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0.02
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R
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1
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Bushing, 1inx0.75in
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0.43
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S
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1
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Coupling, 1.00in
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0.33
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T
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24
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Pipe, 1.00in
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0.28
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$2.36
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