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Multilayer composite structure conductor outer layer stainless steel welding line helium mass spectrum backpressure leakage detection method

A helium mass spectrometer leak detector and multi-layer composite technology, which is applied in the field of internal coil detection of superconducting tokamak devices, can solve problems such as leak detection of stainless steel armor layer 3, and achieve the effects of convenient operation, easy implementation, and guaranteed sealing

Active Publication Date: 2019-08-27
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing ITER conductor leak detection method is only suitable for conductors that can apply helium pressure inside. For the inner coil conductor, since the stainless steel armor layer 3 has an insulating layer 2 and a copper conductor 1 inside, it is impossible to apply helium pressure inside. Stainless steel armor layer 3 for leak detection

Method used

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  • Multilayer composite structure conductor outer layer stainless steel welding line helium mass spectrum backpressure leakage detection method
  • Multilayer composite structure conductor outer layer stainless steel welding line helium mass spectrum backpressure leakage detection method
  • Multilayer composite structure conductor outer layer stainless steel welding line helium mass spectrum backpressure leakage detection method

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Embodiment Construction

[0023] Such as image 3 As shown, a multilayer composite structure conductor outer layer stainless steel weld helium mass spectrometry back pressure leak detection method, the specific steps are as follows:

[0024] (1) Leak detection system assembly: the leak detection system includes a helium mass spectrometer leak detector, a leak detection tool and a rough pump, and the helium mass spectrometer leak detector and the rough pump all pass through the pipeline and the first vacuum valve It is connected with the leak detection tool, and the leak detection tool is connected with the standard leak hole through the pipeline and the second vacuum valve;

[0025] (2) Calibration: First, connect the helium mass spectrometer leak detector directly to the standard leak, and perform the calibration operation on the helium mass spectrometer leak detector. The output signal value of the standard leak on the helium mass spectrometer leak detector is the calibrated leak rate Q of the system...

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Abstract

The invention discloses a multilayer composite structure conductor outer layer stainless steel welding line helium mass spectrum backpressure leakage detection method. The method comprises the following steps: firstly pressurizing on a welding line region, after maintaining pressure for a certain time, detecting by using a leakage detection tool. Through the method disclosed by the invention, thebackpressure leakage detection of the multilayer composite structure conductor welding line can be realized, and a seal end socket design is performed on the pressurizing tool, the sealing under highatmospheric pressure is guaranteed, and the tool can be repeatedly and detachably mounted and used on the multilayer composite structure. The pressurizing tool end socket sealing design in the invention has the advantages of being simple in process, convenient to operate and easy to realize.

Description

technical field [0001] The invention relates to the technical field of a detection method for an internal coil of a superconducting tokamak device, in particular to a helium mass spectrometer back pressure leak detection method for a stainless steel weld seam on the outer layer of a multilayer composite structure conductor. Background technique [0002] ITER is currently the first self-sustaining combustion superconducting tokamak fusion reaction experimental device designed and built in the world. It integrates the main scientific and technological achievements of today's international controlled magnetic confinement nuclear fusion research, and is the first human controlled thermonuclear fusion It is an indispensable step in the process of research towards practicality, so it is highly valued by governments and scientific research circles of various countries. In order to improve the vertical stability of the plasma in the vacuum chamber and the safety of the device, ITER ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/26
CPCG01M3/26
Inventor 刘小川朱超金京高娟武玉秦经刚邹红飞
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI