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A large bi-2212 superconducting coil heat treatment furnace system and its pressure control method

A bi-2212, superconducting coil technology, applied in superconducting magnets/coils, the usage of superconducting elements, coil manufacturing, etc., can solve the problems of equipment and process control complexity, to ensure surface cleanliness problems and system reliability. , cost-effective effect

Active Publication Date: 2021-09-07
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

[0010] (3) There is complexity in the equipment and process control in the heat treatment process

Method used

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  • A large bi-2212 superconducting coil heat treatment furnace system and its pressure control method

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Embodiment Construction

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0040] Such as figure 1 As shown, a large-scale Bi-2212 superconducting coil heat treatment furnace system includes a pressure-resistant furnace shell 19, a pressure-resistant furnace cover 7, a heat insulation layer 9, a heating chamber 37, a temperature-equalizing radiation screen 14, an equalizing pipeline 20, Support workbench 18, liquid argon tank 21, oxygen-argon mixed gas tank 1, uniform temperature radiation screen inlet pipeline 16, unifor...

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Abstract

The invention discloses a large-scale Bi‑2212 superconducting coil heat treatment furnace system and its pressure control method, including a pressure-resistant furnace shell, a pressure-resistant furnace cover, a heat insulation layer, a heating chamber, a uniform temperature radiation screen, a gas pipeline and safety devices etc. It meets the system design requirements of Bi-2212 superconducting coil heat treatment at high temperature and high pressure. The design of the uniform temperature radiation screen in the heat treatment furnace improves the uniformity of the heat treatment temperature of the superconducting coil on the one hand, and ensures the cleanliness of the superconducting coil on the other hand. The pressure control method includes the following stages: gas replacement in the pressure-resistant furnace shell; gas replacement in the uniform temperature radiation screen; synchronous pressurization and gas micro-introduction and micro-exhaust stages. The invention has the advantages that the system adopts an intrinsically safe design, has high safety reliability and high cost performance. This system is suitable for processing large Bi-2212 superconducting coils with an outer diameter of 0.1-3m and a height of 0.1-3m. The heat treatment temperature of the superconducting coil can be effectively controlled, and the temperature uniformity of the superconducting coil can reach ±5°C, which improves the superconducting performance of the Bi‑2212 superconducting coil.

Description

technical field [0001] The invention relates to the technical field of heat treatment of large Bi-2212 superconducting coils, in particular to a large Bi-2212 superconducting coil heat treatment furnace system and a pressure control method thereof. Background technique [0002] With the development of technology and research, the requirements for magnetic field strength have also increased, such as large accelerator magnets, fusion device magnets, etc., all need to provide ultra-high background magnetic fields. Low temperature superconductor Nb 3 Sn and NbTi are subject to the upper critical field (Hc 2 ) has been gradually unable to meet the demand. Therefore, high-temperature superconducting materials with high critical fields can meet the needs of future high-field magnet development. [0003] The critical temperature of Bi-2212 high-temperature superconducting material is 85K, and its upper critical magnetic field at 4.2K is 100T. Bi-2212 is currently the only high-t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27D7/06F27D19/00H01F41/04H01F6/06H01B12/02
CPCF27D7/06F27D19/00F27D2007/063F27D2019/0009F27D2019/0068H01B12/02H01F6/06H01F41/04Y02E40/60
Inventor 王维俊于敏杨东昇秦经刚陈俊凌武玉李建刚
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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