Method for completely checking pressure pipeline with heat preservation function without stopping running

A technology for pressure pipelines and inspection methods, which is applied in measuring devices, instruments, and the use of wave/particle radiation, etc., can solve problems such as the difficulty of inspection of thermal insulation pipeline welds, the inability to judge the position of pipeline welds, and the inability to understand imaging quality in a timely manner. , to achieve high sensitivity, improve work efficiency, and high detection efficiency.

CN102519969AActive Publication Date: 2012-06-27北京市丰台区特种设备检测所 +1
1 Cites 15 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2012-06-27

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides a method for completely checking a pressure pipeline with a heat preservation function without stopping running. The method comprises the following steps of: (1) determining a key erosion detection measurement part of the pressure pipeline with the heat preservation function by using an infrared thermal imaging technology; and (2) detecting the part to be detected by using an x-ray real-time imaging technology. According to the method for completely checking the pressure pipeline with the heat preservation function without stopping running, the problem about detection for welding quality of a welded joint of the similar pipeline and selective examination and measurement for residual thickness of the pipeline is solved by using the infrared thermal imaging technology and the x-ray real-time imaging technology; therefore, the requirement of checking without stopping running can be met, and the work efficiency can be improved.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a non-stop comprehensive inspection method for a pressure pipeline with heat preservation. Background technique

[0002] "Regulations for Periodic Inspection of Industrial Pipelines in Use" (Trial) requires non-destructive testing of welded joints of pipelines and random inspection of remaining thickness of pipelines in the comprehensive inspection. Inspection of undercut and misalignment of pipe welds and random inspection of remaining thickness of pipes are difficult inspection points.

[0003] Conventional X-rays are more difficult to detect welds of pipes with insulation, because the position of welds in pipes cannot be judged. For some special media, such as liquid ammonia, which also has an absorption effect on X-rays, the quality of imaging cannot be known in time after detection, and the detection efficiency is low.

[0004] X-ray real-time imaging technology has been widely used in various industries. The mandatory ...

Examples

Embodiment Construction

[0064] The non-stop comprehensive inspection method for pressure pipelines with thermal insulation provided by the present invention specifically includes the following steps:

[0065] 1 Use infrared thermal imaging technology to determine the key measurement sites for spot checks of remaining thickness.

[0066] Infrared thermal imager uses infrared detector, optical imaging objective lens and optical-mechanical scanning system (the current advanced focal plane technology omits optical-mechanical scanning system) to accept the infrared radiation energy distribution pattern of the measured target and reflect it to the photosensitive sensor of the infrared detector. In terms of components, the infrared radiation energy is converted into electrical signals by the detector, and the infrared thermal image is displayed on the TV screen or monitor after amplification, conversion or standard video signal. This thermal image corresponds to the heat distribution field on the surface of...