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Petroleum pipeline detecting system

A detection system and oil pipeline technology, applied in pipeline systems, mechanical equipment, gas/liquid distribution and storage, etc., can solve the problems of unstable running speed of detectors, untimely data information transmission, and low positioning accuracy of pipeline defects. Achieve the effect of reducing missed detection of pipeline defects, realizing timing positioning, and improving accuracy

Inactive Publication Date: 2010-03-17
HARBIN ENG UNIV
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Problems solved by technology

[0004] Although there have been public reports on in-pipeline detection technology, these existing technologies have not solved the problem of unstable detector running speed due to changes in the liquid pressure in the pipe, which affects the accuracy of detection and low positioning accuracy for pipeline defects. Problems such as untimely transmission of data information inside and outside the pipe

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Embodiment Construction

[0024] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0025] combine figure 1 , the magnetic flux leakage detector of the present invention differs according to the order of the functions completed by each part in the detection process:

[0026] 1. Driving device 7. The magnetic flux leakage detector moves forward in the tube through the pressure difference generated by the liquid on the surface of the driving cup. Due to the change of the liquid pressure in the tube, the running speed of the detector is unstable and the accuracy of the detection is affected. Therefore, it is necessary to pass the speed The control device 8 changes the size of the driving surface in contact with the liquid, and then changes the driving force to achieve the purpose of adjusting the running speed of the detector. A battery section 14 is installed in the middle of the driving device 7 to provide the energy required for the normal oper...

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Abstract

The invention provides a petroleum pipeline detecting system which comprises an excitation device, a detecting device, a mileage wheel, a data processing unit, a pipe internal and external data transmission device based on an ultra-low frequency electromagnetic pulse emitter, a low frequency signal emitter based on 22Hz, a low frequency signal receiver based on 22Hz, a driving device, a speed control device, a receiving sensor array, and a data analyzing unit. The system guarantees the stable running of a petroleum pipeline detector by installing a supporting wheel below the pipe internal andexternal data transmission device based on the ultra-low frequency electromagnetic pulse emitter, reduces the situation that detects of the pipeline are undetected by installing the speed control device, improves the locating precision of the pipeline defects by installing a pipe external defect locating device of the low frequency signal generator based on 22Hz, is beneficial to timely finding out defect positions in the pipe by installing the pipe internal and external data transmission device based on the ultra-low frequency electromagnetic pulse emitter.

Description

(1) Technical field [0001] The invention relates to a pipeline defect detection device, mainly an in-service petroleum pipeline defect detection device, and particularly relates to a magnetic flux leakage pipeline detection technology. (2) Background technology [0002] In-pipeline detection technology is a pipeline integrity management tool used to judge and quantify the risk of pipeline corrosion failure. According to different detection methods, it can be divided into leakage flux type, ultrasonic waveform, eddy current type, far-field eddy current type, electromagnetic sound type etc. Among them, magnetic flux leakage detection is a relatively mature and widely used in-pipeline detection technology. The application of this technology can detect metal loss defects caused by internal and external corrosion of pipelines, and has low requirements for the cleanliness of the detected pipelines, and is mainly used for defect detection of oil pipelines. [0003] Public reports...

Claims

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Application Information

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IPC IPC(8): F17D5/06
Inventor 刘胜田凯刘洪丹刘杨
Owner HARBIN ENG UNIV
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