Method for detecting defect of inner wall of steel pipe for boiler based on phased array technology

A technology for detecting defects on the inner wall of steel pipes, applied to measuring devices, using sound waves/ultrasonic waves/infrasonic waves to analyze solids, and using sound waves/ultrasonic waves/infrasonic waves for material analysis, etc., can solve problems such as erosion, pipe inner wall corrosion, and inner wall corrosion, and achieve The implementation process is simple, the detection accuracy is high, and the effect of avoiding boiler tube bursting

Inactive Publication Date: 2017-09-08
STATE GRID CORP OF CHINA +2
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Problems solved by technology

[0002] In recent years, with the construction of supercritical and ultra-supercritical power plant boilers, the types of steel pipes used in boilers have continued to increase. During infrastructure construction and operation, due to poor protection measures or water quality, etc., it is easy to cause corrosion and erosion of the inner wall of the pipe; especially during infrastructure construction. Among them, due to the long construction period of the equipment and the use of unqualified pipes by many unscrupulous merc

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  • Method for detecting defect of inner wall of steel pipe for boiler based on phased array technology
  • Method for detecting defect of inner wall of steel pipe for boiler based on phased array technology

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[0025] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments of the specification.

[0026] Such as figure 1 with figure 2 As shown, the method for detecting inner wall defects of boiler steel pipes based on phased array technology in this embodiment includes the following steps:

[0027] S1: Detect the target steel pipe, and obtain the defect map of the inner wall of the target steel pipe using phased array inspection equipment;

[0028] S2: Match the defect map with a preset standard map library to determine the defect parameters of the target steel pipe. The standard map library contains the correspondence between different defect parameters and corresponding defect maps.

[0029] The defect parameter in step S2 includes at least one of shape, length, and depth.

[0030] In this embodiment, the step of generating the standard atlas library in step S2 includes:

[0031] S31: Select the steel pipe of the same material...

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Abstract

The invention discloses a method for detecting the defect of the inner wall of a steel pipe for a boiler based on a phased array technology. The method comprises the following steps: S1, detecting a target steel pipe and acquiring a defect map of the inner wall of a target steel pipe; S2, matching the defect map with a preset standard map database and determining defect parameters of the target steel pipe, wherein the standard map database contains a corresponding relation between different defect parameters and corresponding defect map. The method has the advantages of high detection speed, detection accuracy and capability of accurately judging the defect parameters of the inner wall of the pipe for the boiler.

Description

Technical field [0001] The invention relates to the technical field of non-destructive testing, in particular to a method for detecting defects on the inner wall of a boiler steel pipe based on phased array technology. Background technique [0002] In recent years, with the construction of supercritical and ultra-supercritical power station boilers, the types of boiler steel pipes have been increasing. In the process of infrastructure and operation, due to ineffective protection measures or water quality, it is easy to cause corrosion and erosion of the inner wall of the pipe; especially in the process of infrastructure construction. However, due to the long equipment construction period and the use of unqualified pipes by many unsatisfied businesses, the boiler’s internal wall corrosion and other defects due to the material itself or improper protection during the infrastructure construction process caused certain difficulties in the installation and operation of the boiler. Mor...

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Application Information

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IPC IPC(8): G01N29/06
CPCG01N29/069G01N2291/0234G01N2291/0289G01N2291/2636
Inventor 屈国民龙毅彭碧草熊亮刘云龙唐远富曹智
Owner STATE GRID CORP OF CHINA
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