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Corrugated tube detection method

A detection method and bellows technology, applied in the field of ultrasonic detection, to achieve the effect of accurate detection of defects

Inactive Publication Date: 2019-04-30
润电能源科学技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no detection method for bellows in the prior art

Method used

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Embodiment Construction

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

[0025] Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe the steps as sequential processing, many of the steps may be performed in parallel, concurrently, or simultaneously. Additionally, the order of steps may be rearranged. The process may be terminated when its operations are complete, but may also have additional steps not included in the figure. The ...

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Abstract

The embodiment of the invention relates to the technical field of ultrasonic detection, in particular to a corrugated tube detection method. The corrugated tube detection method comprises steps: in the axial direction of the corrugated tube, at each first detection distance, a first ultrasonic probe is used to perform one-circle detection along the circumferential direction of the corrugated tube,and first circumferential detection echo is detected; in the axial direction of the corrugated tube, a second ultrasonic probe is used to perform continuous detection along the axial direction of thecorrugated tube, and first axial detection echo is detected; the height of the first circumferential detection echo is larger than a pre-acquired circumferential distance-amplitude curve, and the corrugated tube position corresponding to the first circumferential detection echo is judged to have defects; and the height of the first axial detection echo is larger than a pre-acquired axial distance-amplitude curve, and the corrugated tube position corresponding to the first axial detection echo is judged to have defects. According to the technical scheme provided by the embodiment of the invention, the effect of comprehensive corrugated tube defect detection can be realized.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of ultrasonic testing, and in particular to a bellows testing method. Background technique [0002] High temperature and high pressure pipelines are the most common equipment in thermal power plants. The bellows can be freely expanded and contracted within the allowable range of expansion and contraction of the pipeline, and the limit is limited when the maximum expansion and contraction is exceeded to ensure the safe operation of the pipeline. Corrugated pipes are widely used in pressure-bearing pipes of large thermal power units, especially in connecting pipes on the side of steam turbines. The bellows will crack due to stress and medium corrosion during operation. If it is operated for a long time, it will crack and form a penetrating opening, causing medium leakage and causing the unit to stop operating. [0003] Detecting the cracks of the bellows of the expansion joint of the pi...

Claims

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Application Information

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IPC IPC(8): G01N29/44G01N29/04
CPCG01N29/04G01N29/4409G01N2291/023G01N2291/0289
Inventor 靳峰李世涛李世铭侯家绪王志永
Owner 润电能源科学技术有限公司
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