Ultrasonic detection device and method for pipeline leakage

A technology of pipeline leakage and detection device, which is applied in pipeline systems, mechanical equipment, gas/liquid distribution and storage, etc., can solve the problem of inability to detect leakage of pipeline joints, and achieves prevention of man-made or normal leakage accidents, high detection accuracy, and improved detection. The effect of the signal-to-noise ratio

Inactive Publication Date: 2013-09-11
SHAANXI NORMAL UNIV
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  • Abstract
  • Description
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Problems solved by technology

[0005] In order to overcome the problem of inability to detect leakage at pipeline joints in the prior art, the present invention provides an ultra

Method used

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  • Ultrasonic detection device and method for pipeline leakage
  • Ultrasonic detection device and method for pipeline leakage

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Experimental program
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Effect test

Embodiment 1

[0036] Such as figure 1 As shown, the ultrasonic detection device for pipeline leakage in this embodiment is composed of a signal generator 1 , a transmitting ultrasonic transducer 2 , a receiving ultrasonic transducer 3 , a preamplifier 4 , a signal collector 5 and a computer 6 .

[0037] The transmitting ultrasonic transducer 2 of this embodiment is installed on one side of the oil pipeline joint, the receiving ultrasonic transducer 3 is installed on the other side of the oil pipeline joint, and the transmitting ultrasonic transducer 2 passes through the coaxial The cable is connected to the signal generator 1, receives the electrical signal generated by the signal generator 1, and converts it into an acoustic signal and transmits it along the oil pipeline, receives it by the receiving ultrasonic transducer 3, and converts it into an electrical signal output, and receives the ultrasonic transducer The output end of device 3 is connected with the input end of preamplifier 4 b...

Embodiment 2

[0056] The structure of the ultrasonic detection device for pipeline leakage in this embodiment is the same as that in Embodiment 1.

[0057] In the method for ultrasonic detection of oil pipeline joint leakage by using the detection device, step (1) is that the signal generator 1 sends out a rectangular pulse electrical signal with a power of 10W, a frequency of 1MHz, and a pulse width of half the signal period. Step (2) is that the above-mentioned rectangular pulse electrical signal is transmitted to the transmitting ultrasonic transducer 2 through the coaxial cable, and the transmitting ultrasonic transducer 2 converts the received rectangular pulse electrical signal into an ultrasonic signal for transmission along the oil pipeline; The transducer is a commercially available common piezoelectric ultrasonic transducer with a frequency of 1 MHz and a bandwidth of 30% of its center frequency. Step (4) is for the preamplifier 4 to amplify the received electrical signal, the gai...

Embodiment 3

[0060] The structure of the ultrasonic detection device for pipeline leakage in this embodiment is the same as that in Embodiment 1.

[0061] In the method for ultrasonic detection of oil pipeline joint leakage by using the detection device, step (1) is that the signal generator 1 sends out a rectangular pulse electrical signal with a power of 50W, a frequency of 5MHz, and a pulse width of half the signal period. Step (2) The above-mentioned rectangular pulse electrical signal is transmitted to the transmitting ultrasonic transducer 2 through the coaxial cable, and the transmitting ultrasonic transducer 2 converts the received rectangular pulse electrical signal into an ultrasonic signal for transmission along the oil pipeline; the transducer It is a commercially available common piezoelectric ultrasonic transducer with a frequency of 5 MHz and a bandwidth of 60% of its center frequency. Step (4) is for the preamplifier 4 to amplify the received electrical signal, the gain of ...

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Abstract

The invention relates to an ultrasonic detection device and method for pipeline leakage. According to the ultrasonic detection device and method for pipeline leakage, a transmitting ultrasonic transducer and a receiving ultrasonic transducer are respectively arranged at two ends of a pipeline connector or a pipeline, the transmitting ultrasonic transducer transmits ultrasonic signals, the receiving ultrasonic transducer receives ultrasonic signals, and a preamplifier is utilized to amplify the signals; after a signal collector collects the signals, the signals are subjected to related cancellation method treatment through a computer so that defect signals are extracted, and accordingly whether the pipeline leaks is judged. The ultrasonic detection device is simple in structure and convenient to operate, detection results are accurate, detection precision is high, and real-time monitoring can be performed. Besides, according to the ultrasonic detection method, not only can leakage of the transmission pipeline be detected, but also leakage at the position of the pipeline connector can be detected, detection sensitivity and accuracy are high, antijamming capability is strong, the signal-to-noise ratio of the received signals is improved, and the defect signals can be effectively extracted simultaneously through the related cancellation treatment of the signals.

Description

technical field [0001] The invention belongs to the technical field of pipeline detection, in particular to an ultrasonic detection device and method for pipeline leakage. Background technique [0002] In the petroleum industry, pipelines are very important transportation equipment, but pipeline leakage will occur due to erosion, mechanical failure, construction and other reasons, which will not only cause certain economic losses, but may also cause catastrophic events such as explosions. Therefore, the detection of pipeline leakage is of great significance to the oil and gas industry. [0003] At present, the phenomenon of pipeline leakage has attracted great attention from relevant departments and scientific research institutes. Many units have carried out research on pipeline leakage detection technology, and some severely damaged pipelines have been installed with leakage detection devices. These detection devices have also played a very important role in avoiding furth...

Claims

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Application Information

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IPC IPC(8): F17D5/06
Inventor 张小凤张光斌王彩峰郝君宇汪艳孙秀娜
Owner SHAANXI NORMAL UNIV
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