OSAT 3D Printable Treadle Pump: Difference between revisions

This page was part of an MTU course MSE4777 OA and MSE4777 OB/MSE5777/EE4777/EE5777: Open-source 3-D printingPlease leave comments using the talk page. The course runs in the Fall semester. It is not open edit.Read more...

3D Printable Treadle Pump

Project developed by Josh Kizer

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Abstract

1. The treadle pump is a lift pump designed to irrigate small plots of land. Treadle pumps are designed to be opperated by the farmer or hand in a "stair stepper" type motion to lift water from a depth of not over seven meters. Pumps manufacrtured today such as this one http://www.newdawnengineering.com/website/pumps/treadle/ are typically made of welded steel components with O ring seals. O rings are not readily available and having the skills and equipment to weld the components is rare in remote comunities. Another large conponent of cost is the check valves. These are typically not servicable and even more scarce than O rings. This design incorperates simple flap style check valves that are easy to understand and fix if necessary. The piston and rods are 3D printable as well the intake valve and top spout. The piston and valves utilize no seals however the pumping efficiancy is greatly reduced. This can be improved with the addition of seals made of silicon caulk or possibly the soles of worn shoes. The cylinders will be made of PVC pipe 4-6 inches in diameter, and the frame and pedels will be made of available local materials or 2x4's.
2. Picture of completed print using

   File:Name-of-your-image.png

Bill of Materials

1. 2x Piston Source STL
2. 8x Flap Source STL
3. 8x 30mm x 1.75mm Filament bits
4. 2x Intake Valve Source STL
5. 2x Bottom Cap Source STL
6. 1x Spout Source STL
7. 2x Rods
8. 2x 25mm x 10mm wooden dowels or carved pins
9. 2x 1ft section of PVC Pipe $9.34/foot http://www.usplastic.com/catalog/item.aspx?itemid=38267&catid=727

Tools needed for fabrication of the OSAT

1. MOST Delta RepRap or similar RepRap 3-D printer
2. Knife to clean prints as necessary
3. 1.75mm Drill Bit
4. 10mm Drill Bit
5. Metal Putty Knife
6. Lighter
7. Hot Glue Gun (could use lighter)

Skills and Knowledge Necessary to Make the OSAT

Basic carpentry for frame assembly and rod shaping

Technical Specifications and Assembly Instructions

1. Include print time estimate
2. Include assembly time estimate
3. Including drawings or pictures of the device at stage of assembly at minimum. (http://www.appropedia.org/Special:Upload)

1. Print all components as necessary
2. Clean parts (remove oozes and strings)
3. Ream Holes in piston, intake, and flaps using drill bits
4. Use hot glue to make gaskets on flaps.
   1. Apply glue to Flap
   2. Place putty knife over glue to flatten
5. Cut Filament pieces to length
6. Assemble flaps to Piston and Intake Valve using filament sections (heat ends of filament with lighter and bend over)
7. Form a Hot Glue Gasket on bottom of PVC Pipes
8. Assemble PVC Pipe over Intake Valve
9. Place PVC and Valve into Bottom Cap
10. Cut notches in the top of cylinders by scoring with knife
11. Whittle a stick to serve as pins in the piston to rod connection (should fit tightly into piston)
12. Whittle a stick to serve as rod
13. Assemble Rods to pistons using whittled sticks
14. Insert Piston and rod assembly into cylinder
15. Place Spout over cylinders
16. Assemble a frame and pedals using locally available materials and technology.

Common Problems and Solutions

• Include common mistakes/problems to avoid in building your OSAT and how to overcome them

Cost savings

• If your solution is not a low cost one then it is not really appropriate.

1. Estimate your costs
2. Find a commercial equivalent
3. Calculate $ savings and % savings

References

• The sources of information (e.g. engineering handbooks, journal articles, government documents, webpages, books, magazine articles etc.). References should use the <ref> </ref> and <references/> tags and can be in any format but should include all the information necessary for someone else to find the same information you did. For example: ^[1]

Based on the developmental needs addressed (e.g. food, heat, electricity, clean water, health care, etc.) be sure to label your device in the proper categories e.g. use [[Category:Water]]. Be sure to categorize your device so that it will be easy to find – for example “Low voltage connection basics” is categorized in [[Category:How tos]] [[Category:Electricity]] [[Category:Electric lighting]].