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Dewar with magnetic shielding or electromagnetic shielding

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

Inactive Publication Date: 2013-03-27
北京云电英纳超导电力技术有限公司 +1
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  • Claims
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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 shield or an electromagnetic shield in 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 an annular Dewar, and the inner cylinder and the outer cylinder A group of magnetic shields or electromagnetic shields 4 are arranged between the magnetic fields.

[0028] The magnetic shielding body is made of high-permeability materials such as magnet-conducting plates or steel plates, silicon steel sheets, and magnetic plastics. It essentially guides the distribution of the magnetic field, and utilizes the high permeability of the magnetic shielding layer to allow the magnetic field to pass through the magnetic shielding layer. It does not pass through the shielded part, so the magnetic shield is installed between the shielding magnetic field and the shielded part to separate the two. The magnetic shield of the superconducting magnet Dewar...

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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 low-temperature equipment manufacturing technology, and in particular relates to a superconducting magnet Dewar, which is mainly used in the production field of the 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 uses. Superconducting magnets need to work at low temperatures, and Dewars are usually used to maintain their low-temperature environment during operation. [0003] Dewar is composed of two closed cylinders, the inner cylinder and the outer cylinder. The closed space of the inner cylinder is a low-temperature zone, which maintains a low-temperature environment, and superconducting magnets are placed in the inner cylinder. The closed space between the inner cylinder and the outer cylinder is a vacuum area, which plays a role of heat insulat...

Claims

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Application Information

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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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