Regulator, PSOL and pinch valves in assembly

[martukas]

This primarily focused on updating and placing the Oxygen pressure regulator assembly, but ended up making minor progress with some other parts. This progress is not intended to provide final solutions to any other tickets, only seeks to move us along and help inform priorities.

Adds new parts:

• regulator mounting bracket - had to be designed from scratch, manufacturer does not provide CAD
• additional push-to-connect fitting for inlet and PSOL

New assemblies designs

• new regulator assembly with pneumatic and mechanical interface
• updates SMC PSOL assembly with new fittings
• updates pinch valve assembly, simplifying mounting hardware (no washers)

Internals assembly now has preliminary placement of:

• Regulator
• PSOL
• both pinch valves
• oxygen mixer
• oxygen sensor and overpressure relief manifold

Acrylic has not been updated with cuts for protruding parts and hardware.

This helps us evaluate the overall fit of various parts and what else might need to be solved before we can finalize this.

closes #1252

My reccomendation is that following this PR, the following 2 CAD tasks be tackled before we can have a feasible pneumatics assembly design:

• Pinch valve mounting holes interfere with bracket #1340
• Design overpressure relief pathway #1254
• Make venturi flow sensor CAD model more logical/flexible #1122
• Possibly Design oxygen mixing chamber #915 - or at least merge the existing naive mixer with the oxygen sensor
• Main backup battery mounting #1198 might also help, though may not be absolutely necessary yet

I have tagged both as priority.

Self-review checklist:

• Self-review: looked through the Files changed tab, browsed repository in branch
• Documentation updated - reflects changes in code, electrical or mechanical design
• Documentation and graphics follow the documentation style guide
• New content is linked, easily discoverable, does not require too many clicks
• Follows other relevant parts of contributor wiki
• PR has a descriptive name
• Tagged relevant reviewers

CAD / mechanical only:

• Follows our mechanical engineering standards
• Everything is metric and ISO where possible
• All features and constraints are named
• Imported parts are well-named, with source URL and iProperties
• Screenshots and/or assembly photos updated

[codecov]

Codecov Report

Merging #1337 (ceaa4d9) into master (1f2cabc) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1337   +/-   ##
=======================================
  Coverage   57.53%   57.53%           
=======================================
  Files         102      102           
  Lines        3471     3471           
  Branches      333      333           
=======================================
  Hits         1997     1997           
  Misses       1474     1474           

Flag	Coverage Δ
common	95.90% <ø> (ø)
controller	57.37% <ø> (ø)
gui	29.42% <ø> (ø)

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[CLAassistant]

All committers have signed the CLA.