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Ultrasonic non-destructive testing device for pipeline defects

A non-destructive testing and ultrasonic technology, applied in the field of ultrasonic testing, can solve problems such as missing defects, and achieve the effect of strong waterproof ability and high detection accuracy

Active Publication Date: 2018-05-15
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the existing invention "Petroleum Pipeline Ultrasonic Detection Method and Detection Robot" (public number: CN1982889A) needs to use the oil in the pipe as a coupling agent, which can only be used for the defect detection of petroleum pipelines, and the ultrasonic probe of this invention Through the circumferential rotation detection, there will be missed detection of defects

Method used

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  • Ultrasonic non-destructive testing device for pipeline defects
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  • Ultrasonic non-destructive testing device for pipeline defects

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Embodiment Construction

[0042] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0043] The invention provides an ultrasonic nondestructive testing device for pipeline defects, the principle of which is as follows figure 1 shown. Utilize the ultrasonic echo time difference to quantitatively calculate the relative wall thickness of the pipe wall b to detect the defect of the pipe wall b. When the ultrasonic wave emitted by the ultrasonic transducer 4 propagates in the waveguide, the boundary of the waveguide will affect the propagation of the ultrasonic wave. Using this characteristic , the relative wall thickness of the pipe wall b at this position can be calculated through the time difference of the echo signal of the ultrasonic wave emitted by the ultrasonic transducer 4 . Such as figure 1 As shown, the ultrasonic transducer 4 is fixed on the wheel shaft 2, the rubber wheel 1 and the wheel shaft 2 are connected by an annular f...

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Abstract

The invention discloses a pipe defect ultrasonic nondestructive detecting device, and belongs to the technical field of ultrasonic detection. The detecting device comprises two parts of a wheel array and a control system; the wheel array consists of more than two support wheel systems; two adjacent support wheel systems are fixedly connected through hexagonal connecting pieces, and the connecting staggered angles are larger than 0 degree; and the support wheel systems include at least one wheel ultrasonic probe. The detecting device adopts the wheel ultrasonic probes to realize dry coupling with the inner walls of pipes, solves the trouble of needing to coat a coupling agent, dost not limit detection by mediums in the pipes, and realizes the defect detection for the pipes with various purposes. Centering mechanisms of the support wheel systems have the extending or quick replacing capacity, and can be suitable for detecting the pipes with various apertures; and the multiple sets of support wheel systems are connected in a staggered manner to realize all-covering layout of the pipes, so that the condition of detection missing cannot be generated.

Description

technical field [0001] The invention relates to the technical field of ultrasonic detection, in particular to an ultrasonic detection device applied to pipeline defects. Background technique [0002] As an important infrastructure of a city, pipelines undertake important functions such as information transmission, resource supply, and energy transmission. However, as the age of the pipeline increases, factors such as external damage, construction quality, and harsh working environment will cause pipeline defects such as corrosion and thinning of the pipeline, resulting in frequent pipeline leakage accidents and serious consequences. Therefore, in order to ensure the normal operation of pipelines, relevant departments urgently need to carry out necessary survey and maintenance of various underground pipelines. [0003] The core of pipeline maintenance is the non-destructive testing of pipelines in order to find out whether there is corrosion or collapse of the pipe wall. A ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F17D5/06G01N29/04
CPCF17D5/06G01N29/048G01N2291/023G01N2291/2634
Inventor 宋华葛昆山黄辉银
Owner BEIHANG UNIV
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