{"id":666,"date":"2020-07-29T19:06:44","date_gmt":"2020-07-29T23:06:44","guid":{"rendered":"http:\/\/www.mbeckler.org\/blog\/?p=666"},"modified":"2020-07-29T19:06:44","modified_gmt":"2020-07-29T23:06:44","slug":"3d-printable-blower-adapter-for-platypus-filter-hoses","status":"publish","type":"post","link":"https:\/\/www.mbeckler.org\/blog\/?p=666","title":{"rendered":"3D printable blower adapter for Platypus filter hoses"},"content":{"rendered":"\n

I just returned from a trip into the Boundary Waters Canoe Area Wilderness<\/a> (BWCA) where we had good luck using my Platypus gravity water filter<\/a> to easily produce safe water for drinking and cooking. When I return home from such a trip, I want to clean, disinfect, and dry out the bags and hoses to get them ready for the next expedition. I’ve often thought that it would be useful to have a source of high-volume, low-pressure airflow for drying out these sorts of things (also beer brewing equipment and hoses), but now I’ve finally found a good solution.<\/p>\n\n\n\n

I realized that the little inflator for our air mattress would be a great source of airflow, and that I could probably 3D print a set of adapter nozzles for each type of hose I want to dry out. Here’s the first adapter, for my Platypus filter hoses.<\/strong><\/p>\n\n\n\n

The design is in Open SCAD<\/a>, a free and open source parametric 3D modeling program that works great for simple geometric models. Once you install OpenSCAD you can copy\/paste this code into OpenSCAD and build the model and export an STL. Hopefully you should be able to customize the sizes to adjust for a differently-size blower output or hose diameter:<\/p>\n\n\n\n

\/\/ units = mm\n$fn=64;\n\n\/\/ blower output is 25mm diameter, 12mm along shaft\n\/\/ platypus hose ID is 6mm but the filter barbs are 8.9mm, so... 7mm?\n\n\/\/ Design intent:\n\/\/ Build an outer union and subtract a similar but smaller inner union\n\/\/ Each union is two cylinders connected by a sloping cylinder:\n\/\/ AAAB\n\/\/     B\n\/\/      B\n\/\/       BCCC\n\/\/\n\/\/       BCCC\n\/\/      B\n\/\/     B\n\/\/ AAAB\n\n\/\/ Some variables to adjust the design\nwide_ID = 25; \/\/ Wide end, inner diameter\nwide_OD = 30; \/\/ Wide end, outer diameter\nnarrow_ID = 4; \/\/ Narrow end, inner diameter\nnarrow_OD = 7; \/\/ Narrow end, outer diameter\nwide_h = 12; \/\/ Wide end height before angled part\nangled_h = 12; \/\/ Angled part height\nnarrow_h = 6; \/\/ Narrow end height before angled part\n\ndifference() {\n    \/\/ outer part\n    union() {\n        cylinder(h=wide_h,d=wide_OD);\n        translate([0,0,wide_h])\n            cylinder(h=angled_h,d1=wide_OD,d2=narrow_OD);\n        translate([0,0,(wide_h + angled_h)])\n            cylinder(h=narrow_h,d=narrow_OD);\n    };\n\n    \/\/ inner part to be subtracted\n    union() {\n        translate([0,0,-1])\n            cylinder(h=(wide_h + 1),d=wide_ID);\n        translate([0,0,wide_h])\n            cylinder(h=angled_h,d1=wide_ID,d2=narrow_ID);\n        translate([0,0,(wide_h + angled_h)])\n            cylinder(h=(narrow_h + 1),d=narrow_ID);\n    };\n};<\/code><\/pre>\n\n\n\n
If you add a #<\/code> before the union for the inner part to be subtracted, the OpenSCAD interface will show that component in translucent red:<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
Render the design (F6<\/code> key) and export to STL (F7<\/code> key), then slice and print. <\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
You may need to adjust the parameters to obtain a perfect fit with your specific equipment.<\/p>\n\n\n\n
\"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"
I just returned from a trip into the Boundary Waters Canoe Area Wilderness (BWCA) where we had good luck using my Platypus gravity water filter to easily produce safe water for drinking and cooking. When I return home from such a trip, I want to clean, disinfect, and dry out the bags and hoses to […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[88],"tags":[],"class_list":["post-666","post","type-post","status-publish","format-standard","hentry","category-3d-printing"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p2BznB-aK","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.mbeckler.org\/blog\/index.php?rest_route=\/wp\/v2\/posts\/666","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.mbeckler.org\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.mbeckler.org\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.mbeckler.org\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mbeckler.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=666"}],"version-history":[{"count":1,"href":"https:\/\/www.mbeckler.org\/blog\/index.php?rest_route=\/wp\/v2\/posts\/666\/revisions"}],"predecessor-version":[{"id":670,"href":"https:\/\/www.mbeckler.org\/blog\/index.php?rest_route=\/wp\/v2\/posts\/666\/revisions\/670"}],"wp:attachment":[{"href":"https:\/\/www.mbeckler.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=666"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.mbeckler.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=666"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.mbeckler.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=666"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}