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Superconducting magnet cryogen quench path outlet assembly or method

A cryogen and path technology, applied in the direction of superconducting magnets/coils, container discharge methods, magnetic objects, etc., can solve the problems that refrigerant gas cannot escape, block, etc.

Inactive Publication Date: 2011-03-30
SIEMENS HEALTHCARE LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, if the passage neck 20 is blocked, or severely constricted, the cryogen gas will not be able to escape through the passage neck

Method used

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  • Superconducting magnet cryogen quench path outlet assembly or method
  • Superconducting magnet cryogen quench path outlet assembly or method
  • Superconducting magnet cryogen quench path outlet assembly or method

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Embodiment Construction

[0046] The present invention provides a pre-assembled, pre-tested quench outlet assembly that can be replaced after use and that is not susceptible to clogging by deposits of frozen air components.

[0047] image 3 A schematic axial section of a quench outlet assembly according to an embodiment of the invention is shown. The part is manufactured and leak tested independently of the cryostat. The quench outlet assembly includes a quench valve 26, as with respect to figure 2 as described. The quench valve 26 itself is seated within a flange 28 which provides a mounting surface 30 and connects to a refrigerant outlet conduit 32 . A burst disc is provided, either upstream of the quench valve, such as at position 34 , or downstream of the quench valve, at position 36 . Burst discs may be provided at both locations 34 and 36 if desired. The cryogen exit conduit 32 is sealed to the flange 28 and burst disk to provide a leak-tight assembly that is leak tested prior to assembly ...

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PUM

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Abstract

A pre-assembled, pre-tested quench path outlet assembly for providing a cryogen egress path from a cryogen vessel. A quench valve (26) is mounted within a flange (28). A cryogen egress tube (32) is sealed in leak-tight manner to the flange, to define a cryogen egress path (40) extending through the cryogen egress tube, the flange and the quench valve. The cryogen egress path is closed by a burst disc (34). In use, the pre-assembled, pre-tested quench path outlet assembly is mounted onto the cryogen vessel such that thermal stratification of gas within the cryogen vessel under normal conditions causes a lower end of the cryogen egress tube to be at a temperature below the freezing points of common air components.

Description

technical field [0001] The present invention relates to a quench path for a cryogen vessel containing a superconducting magnet. Background technique [0002] Superconducting magnets are well known and used in several applications such as Magnetic Resonance Imaging (MRI), Nuclear Magnetic Resonance (NMR) spectroscopy, particle acceleration and energy storage, to name a few. Typically, a magnet comprises a coil of superconducting wire cooled in a bath of liquid cryogen. Liquid helium and liquid nitrogen are commonly used cryogens, but others are known. [0003] The difficulty suffered by superconducting magnets is quench. In operation, a large current (typically several hundred amperes) is circulated around a closed superconducting loop comprising many turns of wire. If for some reason any part of the superconducting wire is heated, or subjected to an unbearably strong magnetic field, it will be quenched, reverting to a resistive state. Current passing through the resistiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17C1/00F17C3/00
CPCH01F6/02Y10T137/1714F16K17/16F17C13/04
Inventor 尼尔·C·泰格威尔菲利普·A·C·沃尔顿
Owner SIEMENS HEALTHCARE LTD
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