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Producing method of niobium three stannum cable-in-conduit conductors of large superconducting magnets

A technology of cable conductors and superconducting magnets in tubes, applied in the manufacture of rigid tube cables, etc., can solve problems such as irreversible performance degradation, and achieve the effects of reduced displacement and deformation, good contact and support, and good self-support

Inactive Publication Date: 2012-07-11
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of irreversible performance degradation of the cable conductor in the niobium-three-tin tube in the prior art after multiple electromagnetic cycles, a large superconducting magnet capable of long-term stable operation was manufactured

Method used

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  • Producing method of niobium three stannum cable-in-conduit conductors of large superconducting magnets
  • Producing method of niobium three stannum cable-in-conduit conductors of large superconducting magnets

Examples

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Effect test

Embodiment 1

[0025] Example 1: A method for manufacturing a cable conductor in a niobium-tritin tube of a large superconducting magnet comprises the following steps:

[0026] (1) Pressure, leak detection and flaw detection of stainless steel pipes used as conductor armor;

[0027] (2) Weld the stainless steel pipe into a whole pipe, and inspect the possible defects of the weld;

[0028] (3) Penetrate the superconducting cable of the multi-stage stranded cable into the stainless steel armor;

[0029] (4) Use multi-stage rollers to shrink and shape the conductor, control the void ratio in the conductor to 29-30%, and make the conductor into a rectangular conductor;

[0030] (5) Pre-bend the formed rectangular conductor, and carry out overall pressure leak detection to make the cable conductor in the niobium-three-tin tube.

Embodiment 2

[0031] Example 2: A method for manufacturing a cable conductor in a niobium-three-tin tube of a large superconducting magnet includes the following steps: welding the stainless steel tube 1 into a whole tube, and performing flaw detection and pressure leak detection on the possible defects of the stainless steel tube and the weld seam; The superconducting cable 2 of the twisted cable is penetrated into the stainless steel armor 1, and then passed through the multi-stage roller 3 to reduce the diameter and form it, so that the void ratio in the conductor is controlled at about 30%, and the conductor is made into a rectangular inner cable conductor 4; The formed conductor 4 is pre-bent, fixed on the take-up barrel 5, and subjected to overall pressure leak detection to make a niobium-three-tin inner cable conductor.

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Abstract

The invention discloses a producing method of niobium three stannum cable-in-conduit conductors of large superconducting magnets, which includes steps of conducting cleaning, pressing leakage detecting and flaw detection on a stainless steel tube serving as the conductor armor; welding the stainless steel tube into a homogeneous tube, and detecting probable flaws of welding beads; enabling superconducting cables of multistage stranded cables to penetrate into the stainless armor; conducting hole shrinkage and molding on the conductor by using multistage rollers, controlling the voidage inside the conductor within about 30%, and producing the conductor into a rectangle conductor; and pre-bending the molded rectangle conductor, conducting pressing leakage detecting and flaw detection of the whole to produce the niobium three stannum cable-in-conduit conductors. By means of the producing method, the niobium three stannum cable-in-conduit conductors can decrease and even eliminate the degradation of conductor superconducting performance caused by the electric magnetic circulation.

Description

technical field [0001] The invention mainly relates to the technical field of superconducting magnets, in particular to a method for manufacturing a cable conductor in a niobium-three-tin tube of a large superconducting magnet. Background technique [0002] The cable conductor in the tube is made of niobium-titanium or niobium-three-tin superconducting wire through multi-stage twisting to form a superconducting cable, and then the superconducting cable is inserted into a stainless steel pipe, and the cable conductor in the tube is made by reducing the diameter and forming, using supercritical helium Or superfluid helium for forced flow cooling. This method increases the contact area between the superconducting wire and helium, improves the heat transfer conditions, and makes the cable conductor in the tube have the characteristics of good self-support, low AC loss, less cooling medium required, safe and reliable operation, and high performance. It has become the preferred c...

Claims

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Application Information

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IPC IPC(8): H01B13/004
Inventor 谭运飞匡光力陈文革王福堂陈灼民潘引年陈治友
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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