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Implement a pressure regulator valve when the over/under-pressure reaches <-30.00 Pa, 30.00 Pa> #6

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opened 2023-04-14 07:41:07 +02:00 by kreyren · 2 comments
kreyren commented 2023-04-14 07:41:07 +02:00
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Currently (31bae53305) we are keeping that BackPlate the weakest in terms of material thickness while it's the most stressed wall in terms of projected stress so that in case there is a material failure that it would ex/implode the BackPlate which is the furthest from the user.

In addition to that I want to add a pressure regular relief valve that shows the current pressure in the chamber and can be configured by the user to the desired safety e.g. 30.00 Pa as the design requirement was set on 25.00 Pa and i added 10.00 Pa safety margin (Designed for < -35.00 Pa, 35.00 Pa> of over/underpressure).

FEM simulations (submitted in 31bae53305)

project that the weakest and most stressed wall (BackPlate) will withstand:

<-69.65 kPa, 281.15 kPa> of pressure so the design should be kept modular so that the user can always adjust the pressure for their use.

Currently (https://git.dotya.ml/kreyren/CAD-Laboratory_Glove_Box/commit/31bae53305677c1fe2a299e8b3b7c58b623fd96a) we are keeping that BackPlate the weakest in terms of material thickness while it's the most stressed wall in terms of projected stress so that in case there is a material failure that it would ex/implode the BackPlate which is the furthest from the user. In addition to that I want to add a pressure regular relief valve that shows the current pressure in the chamber and can be configured by the user to the desired safety e.g. 30.00 Pa as the design requirement was set on 25.00 Pa and i added 10.00 Pa safety margin (Designed for < -35.00 Pa, 35.00 Pa> of over/underpressure). FEM simulations (submitted in https://git.dotya.ml/kreyren/CAD-Laboratory_Glove_Box/commit/31bae53305677c1fe2a299e8b3b7c58b623fd96a) ![](https://git.dotya.ml/attachments/7c5fd769-c09a-42ca-b2f2-a5303fa55725) project that the weakest and most stressed wall (BackPlate) will withstand: <-69.65 kPa, 281.15 kPa> of pressure so the design should be kept modular so that the user can always adjust the pressure for their use. ![](https://git.dotya.ml/attachments/a2994426-b4f2-43e0-937e-7fee956f7797)
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kreyren added this to the Initial Release milestone 2023-04-14 07:41:07 +02:00
kreyren self-assigned this 2023-04-14 07:41:07 +02:00
kreyren changed title from Implement a safety relief valve when the over/under-pressure surpasses 30 Pa to Implement a safety relief valve when the over/under-pressure reaches <-30.00 Pa, 30.00 Pa> 2023-04-14 07:50:52 +02:00
kreyren changed title from Implement a safety relief valve when the over/under-pressure reaches <-30.00 Pa, 30.00 Pa> to Implement a pressure regulator valve when the over/under-pressure reaches <-30.00 Pa, 30.00 Pa> 2023-04-14 08:18:58 +02:00
kreyren commented 2023-04-14 08:19:37 +02:00
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After brainstorm it was decided that pressure regulator valve is better implementation as it shows the current pressure and can be configured to relief it at set value.

After brainstorm it was decided that pressure regulator valve is better implementation as it shows the current pressure and can be configured to relief it at set value.
kreyren commented 2023-04-14 10:17:07 +02:00
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<Krey>: Is there any easy solution to implementing a safety relief valve for <-30.00 Pa, 30.00 Pa> to a glass structure? See #6

[discord] <A> Drill a hole and bolt through a pressure relief valve? Two 30Pa rated valves installed contra to each other would give you what you want

[discord] <A> I'd use a rubber or silicone washer on both sides of the glass between it and the metal

<Krey>: can't find any usable relief valve atm they are all in like 10 Bar range.. i guess i could just replace the incidator and the spring from these?

[discord] <A> I'd use a rubber or silicone washer on both sides of the glass between it and the metal

<Krey>: the rubber silicone washer is a good idea thanks, added it in the tracker

<Krey>: bcs like lowest they go is like 100 000 Pascals

<Krey>: also not sure that the relief valve would work for under-pressure even when installed like you describe

  • Krey goes to fetch techdraw


    light blue arrows^

<Krey>: Seems that is what handles the over-pressure so in under-pressure scenario is just seals shut and lets it implode eventually?

<Krey>: bcs afaik the idea is that if there is too much pressure sent in the input

<Krey>: to let the pressure escape this way

<Krey>: but if there is a pressure pulled from either blue or red it will just keeps it shut

https://matrix.to/#/!UFqNkMRTVpIBoLjbQy:libera.chat/$4e4Nm5D0-OzEboHWhrAMdC0fBq_umb8QCRI0F68_akU?via=libera.chat&via=matrix.org&via=karp.lol

\<Krey>: Is there any easy solution to implementing a safety relief valve for <-30.00 Pa, 30.00 Pa> to a glass structure? See https://git.dotya.ml/kreyren/CAD-Laboratory_Glove_Box/issues/6 [discord] \<A\> Drill a hole and bolt through a pressure relief valve? Two 30Pa rated valves installed contra to each other would give you what you want [discord] \<A\> I'd use a rubber or silicone washer on both sides of the glass between it and the metal \<Krey\>: can't find any usable relief valve atm they are all in like 10 Bar range.. i guess i could just replace the incidator and the spring from these? [discord] \<A\> I'd use a rubber or silicone washer on both sides of the glass between it and the metal \<Krey\>: the rubber silicone washer is a good idea thanks, added it in the tracker \<Krey\>: bcs like lowest they go is like 100 000 Pascals \<Krey\>: also not sure that the relief valve would work for under-pressure even when installed like you describe * Krey goes to fetch techdraw ![](https://git.dotya.ml/attachments/d29d410b-ff06-4657-aae0-389072b66f00) ![](https://git.dotya.ml/attachments/f2a9d0e3-c1d8-4804-b167-54b582e4e31b) light blue arrows^ \<Krey\>: Seems that is what handles the over-pressure so in under-pressure scenario is just seals shut and lets it implode eventually? \<Krey\>: bcs afaik the idea is that if there is too much pressure sent in the input ![](https://git.dotya.ml/attachments/94229f53-a015-4317-b0c9-c757610f4afe) ![](https://git.dotya.ml/attachments/ce65ff77-15a1-4ab5-a4c1-00273f43e120) \<Krey\>: to let the pressure escape this way \<Krey\>: but if there is a pressure pulled from either blue or red it will just keeps it shut ![](https://git.dotya.ml/attachments/3e5da4ed-a431-41ce-9342-5aaa4d9892e0) --- https://matrix.to/#/!UFqNkMRTVpIBoLjbQy:libera.chat/$4e4Nm5D0-OzEboHWhrAMdC0fBq_umb8QCRI0F68_akU?via=libera.chat&via=matrix.org&via=karp.lol
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Reference: kreyren/CAD-Laboratory_Glove_Box#6