Patent ID: 6109042
Filing Date: 2000-08-29
Classification: F17C,H01F

Abstract:
A cryostat pressure relieving venting system for a superconducting magnet including a cryogen gas vent attached to the cryostat and connected to an exhaust vent in the enclosure in which the superconducting magnet is installed in order to vent cryogen gas from the cryostat to the atmosphere outside the magnet in the event of an undesired pressure buildup including a burst disk assembly comprising:a burst disk interposed in and blocking said vent during normal operation of said superconducting magnet;said burst disk selected to burst in the event of a cryogen gas pressure in said cryostat which exceeds a predetermined pressure in order to open a path between said cryostat to said atmosphere;a deformable circular gasket forming a ring with a substantially U-shaped cross section surrounding the peripheral edges of said burst disk to cover said peripheral edges and adjacent regions of said burst disk on the opposite sides thereof and form a unitary subassembly to seal said peripheral edges in the region between said burst disk and said vent; andsecuring means for said burst disk assembly extending substantially parallel to the axis of said vent to apply constant pressure to said subassembly to press said burst disk and deformable gasket toward each other to provide said seal;said unitary subassembly facilitating replacement thereof in the event of a burst disk.