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Dewar with magnetic shielding or electromagnetic shielding

An electromagnetic shielding and magnetic shielding technology, applied in the direction of pressure vessels, fixed-capacity gas storage tanks, mechanical equipment, etc., can solve the problems of reduced electrical conductivity and aggravated cooling burden of low-temperature systems, and achieves low cost, simple production, and easy popularization and application Effect

Inactive Publication Date: 2014-12-31
北京云电英纳超导电力技术有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Firstly, under the action of vertical magnetic field, the electrical conductivity of superconducting materials will be greatly reduced; secondly, the alternating magnetic field will cause eddy currents in the metal Dewar wall or other metal parts, resulting in heat loss and increasing the cooling burden of the cryogenic system

Method used

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  • Dewar with magnetic shielding or electromagnetic shielding
  • Dewar with magnetic shielding or electromagnetic shielding
  • Dewar with magnetic shielding or electromagnetic shielding

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Embodiment Construction

[0027] Refer to image 3 As shown, the Dewar with a magnetic shielding body or an electromagnetic shielding body of the present invention includes a Dewar body composed of an inner cylinder 2 and an outer cylinder 1, which is one of an integral type and a ring type Dewar. The inner cylinder and the outer cylinder A set of magnetic shielding body or electromagnetic shielding body 4 is installed between the magnetic fields.

[0028] The magnetic shielding body is made of high permeability materials such as magnetic conductive plates or steel plates, silicon steel sheets, magnetic plastics, etc. It essentially guides the magnetic field distribution, and uses the high permeability of the magnetic shielding layer to make the magnetic field pass through the magnetic shielding layer. Instead of passing through the shielded part, the magnetic shield is installed between the shielded magnetic field and the shielded part to separate the two. The magnetic shield of the superconducting magne...

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Abstract

The invention discloses a Dewar with magnetic shielding or electromagnetic shielding. The Dewar is composed of an inner barrel and an outer barrel, wherein the two closed barrels are in sleeve joint; and the space between the inner barrel and the outer barrel is vacuumized, and a group of magnetic shielding bodies or electromagnetic shielding bodies are arranged between the inner barrel and the outer magnetic field of Dewar. Each magnetic shielding body is made into a strip shape or sheet shape by the use of a silicon steel sheet, or is integrally formed by the use of an outer barrel wall made from magnetic-conduction stainless steel; the electromagnetic shielding body can adopt coils formed by winding conductive material; and the coils are closed end to end to form a short loop surrounding the main magnetic field, or metal plates are welded to form a closed barrel shape. Through the invention, adverse impacts of the outer magnetic field on a superconducting magnet can be shielded or reduced at the same time.

Description

Technical field [0001] The invention belongs to the manufacturing technology of low-temperature equipment, and particularly relates to a superconducting magnet Dewar, which is mainly used in the field of making superconducting magnet low-temperature Dewar. Background technique [0002] Compared with conventional conductors, superconducting materials have a strong flow capacity, and are often used to make magnets of various forms and purposes. Superconducting magnets need to work at low temperatures, and Dewar is usually used to maintain the low temperature environment during their work. [0003] The Dewar is composed of two closed cylinders, an inner cylinder and an outer cylinder. The enclosed space of the inner cylinder is a low temperature area, and the low temperature environment is maintained, and the superconducting magnet is placed in the inner cylinder. The closed space between the inner cylinder and the outer cylinder is a vacuum zone, which plays a role of heat insulati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F17C1/14
Inventor 王立中曹昆南龚伟志王达达王海珍宋萌魏子镪胡南南周年荣陈晓云
Owner 北京云电英纳超导电力技术有限公司
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