Pull rod device of conduction cooling superconducting magnet coil

Abstract

The invention discloses a pull rod device of a conduction cooling superconducting magnet coil. The pull rod device comprises a bracket base which is fixed on the inner edge of a low-temperature container and is made of nonmagnetic austenitic stainless steel, wherein the bracket base is provided with a circular arc opening and a bracket base circular pit; the bracket base is provided with a jackscrew bracket made of nonmagnetic austenitic stainless steel; the bracket base is connected with the jackscrew bracket through a jackscrew; and a pull rod made of nonmagnetic austenitic stainless steel or a titanium alloy is arranged between the bracket base and the jackscrew bracket, and passes through the jackscrew bracket and the circular arc opening. The pull rod device has the beneficial effects: the defects of the conventional pull rod are overcome specific to a heat conduction heat leakage source in conduction cooling magnet heat leakage, the position of the magnet coil in the low-temperature container can be adjusted conveniently through the pull rod device, heat conduction of a magnet system is reduced by reducing the contact area, heat leakage of a magnet is reduced, and the stability of the magnet is enhanced greatly; and the pull rod device has a good effect in practical application, and is convenient to use.

Description

technical field [0001] The invention belongs to the technical field of superconducting magnets, and relates to a pull rod device for conduction cooling superconducting magnet coils between a superconducting magnet coil skeleton and a cryostat. Background technique [0002] With the shortage of liquid helium resources and the development of refrigeration technology, the research on conduction-cooled (Conduction-Cooled, also known as refrigerator cooling, liquid-free helium, Cryogen-Free) superconducting magnet technology is gradually becoming practical. Most of the magnets currently in use are relatively mature low-temperature superconducting magnets soaked in liquid helium, especially the most widely used superconducting magnetic resonance imaging (MRI) system. The main magnets are all made of NbTi low-temperature superconducting wires. Soak in liquid helium. However, the cost of NbTi low-temperature superconducting magnets is high, and because they must work in the liquid ...

AI Technical Summary

Problems solved by technology

Due to the compactness of the superconducting magnet and the tight connection between the parts, it is very inconvenient to adjust the nut in the radial direction of the magnet coil; many tie rod structures are directly installed on the upper part of the coil, and the heat conduction path is relatively short, which is not conducive to suppressing heat conduction; many The structure of the tie rod is complicated, the materials are various, and the performance at low temperature is quite different. It is difficult to obtain the low temperature stability of the tie rod.

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