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MUFFLER HOLE DESIGN AND BURST PROTECTION FOR LOW CRYOGEN MAGNET BURST DISC

IP.com Disclosure Number: IPCOM000239450D
Publication Date: 2014-Nov-07
Document File: 3 page(s) / 185K

Publishing Venue

The IP.com Prior Art Database

Abstract

The present invention proposes a technique to vent out the helium gas by a burst disc. The technique includes a muffler holes for the burst disc. A low cryogen magnet (LCM) is provided with one burst disc for a helium loop. There are total eight holes provided with certain flow diameter that allows total discharge area of certain square meters (Sq.m). The number of holes and diameter is designed based on the minimum required discharge area requirement. Flow restriction created by the muffler is also calculated and compared to overall pressure loss in the magnet. The flow restriction created by the muffler is found to be negligible.

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MUFFLER HOLE DESIGN AND BURST PROTECTION FOR LOW CRYOGEN MAGNET BURST DISC

FIELD OF INVENTION

The invention generally relates to a burst disc and more particularly to muffler hole design for the burst disc.

BACKGROUND OF THE INVENTION

Liquid helium is generally used as a coolant for effective working of superconductive windings. Among other systems using superconductive windings, magnetic resonance imaging (MRI) systems also use helium as coolant for quenching. Quench systems are designed to discharge the potential lethal gaseous helium during an MRI quench in the safest possible manner.

A traditional MRI magnet includes a separate piping system for venting helium gas into atmosphere. During the assembly process or preventive maintenance, when the vent assembly is removed, and in case of disc rupture, helium gases from the magnet could potentially come in direct contact with a technician. Moreover, debris from the disc could potentially result in injury to the technician.

 It would be desirable to have an efficient technique to vent out helium gas safely. 

BRIEF DESCRIPTION OF THE INVENTION

The present invention proposes a technique to vent out helium gas downstream of a burst disc by providing a set of muffler holes. This design also includes a protective barrier for protecting technicians from direct impingement of oncoming helium gas. A low cryogen magnet (LCM) is provided with one burst disc for a helium loop.

DETAILED DESCRIPTION OF THE INVENTION

The present invention proposes a technique to vent out helium gas downstream of a burst disc by providing a set of muffler holes. This design also includes a protective barrier for protecting technicians from direct impingement of oncoming helium gas A low cryogen magnet (LCM) magnet is provided with one burst disc for a helium loop.

FIG.1

There are total eight hole...