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Vacuum Break and Restraint of L-Shape Helium Vessel under Pressure and Temperature

This meeting provides updates on the vacuum break and restraint of the L-shape helium vessel, including the modeling of the vacuum break and the design of the support "cage" structure. It discusses the wall thickness, stiffening rings, external pressure, hanging load, and domes at different temperatures. The meeting also covers the modeling of the corrugated vacuum barrier membrane and the connection possibilities of the restraining arms to the vacuum vessel under internal pressure.

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Vacuum Break and Restraint of L-Shape Helium Vessel under Pressure and Temperature

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  1. DFX – Weekly Meeting (09.09.2019)Updates on vacuum break and restraint of L-shape helium vessel under pressure and temperature W Bailey, Y. Yang, J. Pelegrin 04 October 2019

  2. DFX Concept v.3.5.14 – Vacuum break modelling Support “cage” 3-pillars design – 1.5 mm wall thickness, 2 mm stiffening rings, length = 325 mm External pressure applied = 1.5 bar, 200 kg hanging load, Domes at 4.2 K Domes Weld ring Ring flange Cage structure Vacuum barrier membrane “Warm” vacuum flange DFX –CDR 04 Oct 2019

  3. DFX Concept v.3.5.14 – Vacuum break modelling Support “cage” 3-pillars design – 1.5 mm wall thickness, 2 mm stiffening rings, length = 325 mm External pressure applied = 1.5 bar, 200 kg hanging load, Domes at 4.2 K DFX –CDR 04 Oct 2019

  4. DFX Concept v.3.5.14 – Vacuum break modelling Support “cage” 3-pillars design – 1.5 mm wall thickness, 2 mm stiffening rings, length = 325 mm External pressure applied = 1.5 bar, 200 kg hanging load, Domes at 4.2 K DFX –CDR 04 Oct 2019

  5. DFX Concept v.3.5.14 – Vacuum break modelling Corrugated vacuum barrier membrane – 0.5 mm wall thickness, effective length ~ 780 mm External pressure applied = 1.5 bar, 200 kg hanging load, Domes at 4.2 K DFX –CDR 04 Oct 2019

  6. DFX Concept v.3.5.14 – Vacuum break modelling Corrugated vacuum barrier membrane – 0.5 mm wall thickness, effective length ~ 780 mm External pressure applied = 1.5 bar, 200 kg hanging load, Domes at 4.2 K DFX –CDR 04 Oct 2019

  7. DFX Concept v.3.5.14 – Vacuum break modelling Corrugated vacuum barrier membrane – 0.5 mm wall thickness, effective length ~ 780 mm Support “cage” 3-pillars design – 1.5 mm wall thickness, 2 mm stiffening rings, length = 325 mm DFX –CDR 04 Oct 2019

  8. DFX Concept v.3.5.14 – Vacuum break modelling Corrugated vacuum barrier membrane – 0.5 mm wall thickness, effective length ~ 780 mm Support “cage” 3-pillars design – 1.5 mm wall thickness, 2 mm stiffening rings, length = 325 mm DFX –CDR 04 Oct 2019

  9. DFX Concept v.3.5.14 – Vacuum break modelling Corrugated vacuum barrier membrane – 0.5 mm wall thickness, effective length ~ 780 mm Support “cage” 3-pillars design – 1.5 mm wall thickness, 2 mm stiffening rings, length = 325 mm DFX –CDR 04 Oct 2019

  10. DFX Concept v.3.5.14 – Helium vessel restraint Restraining arms = x 2 (25 mm OD x 5 mm wall x 850 mm long) Connection possible between reinforcing rib to be added to elbow and the vacuum vessel 3.5 bar internal pressure @ 300 K 3.5 bar internal pressure @ 4.2 K DFX –CDR 04 Oct 2019

  11. DFX Concept v.3.5.14 – Helium vessel restraint Restraining arms = x 2 (25 mm OD x 5 mm wall x 850 mm long) Connection possible between reinforcing rib to be added to elbow and the vacuum vessel 3.5 bar internal pressure @ 300 K 3.5 bar internal pressure @ 4.2 K DFX –CDR 04 Oct 2019

  12. DFX Concept v.3.5.14 – Helium vessel restraint Restraining arms = x 2 (25 mm OD x 5 mm wall x 850 mm long) Connection possible between reinforcing rib to be added to elbow and the vacuum vessel DFX –CDR 04 Oct 2019

  13. DFX Concept v.3.5.14 – Helium vessel restraint Restraining arms = x 2 (25 mm OD x 5 mm wall x 850 mm long) Connection possible between reinforcing rib to be added to elbow and the vacuum vessel 3.5 bar internal pressure @ 4.2 K Flange fixed 3.5 bar internal pressure @ 4.2 K Flange fixed DFX –CDR 04 Oct 2019

  14. DFX Concept v.3.5.14 – Helium vessel restraint Restraining arms = x 2 (25 mm OD x 5 mm wall x 850 mm long) Connection possible between reinforcing rib to be added to elbow and the vacuum vessel 3.5 bar internal pressure @ 4.2 K Top flange fixed 3.5 bar internal pressure @ 4.2 K Top flange fixed DFX –CDR 04 Oct 2019

  15. DFX Concept v.3.5.14 – Helium vessel restraint Restraining arms = x 2 (25 mm OD x 5 mm wall x 850 mm long) Connection possible between reinforcing rib to be added to elbow and the vacuum vessel 3.5 bar internal pressure @ 4.2 K Top flange roller 3.5 bar internal pressure @ 4.2 K Top flange roller DFX –CDR 04 Oct 2019

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