Online visual internal detection device and method for gas pipeline

Abstract

The invention relates to an online visual internal detection device and method for a gas pipeline. The online visual internal detection device comprises a shell composed of a side front shell, a side rear shell and a side shell, the side front shell is arranged at the front part of the side shell, and the side rear shell is arranged at the rear part of the side shell; a head high-voltage-resistant integrated module is arranged at the end part of the side front shell, and a tail high-voltage-resistant integrated module is arranged at the end part of the side rear shell; four supporting legs are arranged in the middle of the side shell in the circumferential direction at intervals, and an auxiliary odometer wheel is arranged at the end of each supporting leg; and a plurality of side front high-voltage-resistant integrated modules are uniformly distributed in the circumferential direction of the front end of the side shell, and a plurality of side rear high-voltage-resistant integrated modules are uniformly distributed in the circumferential direction of the rear end of the side shell. The device is connected to a conventional in-pipeline detector or a geometric detector, the detection result of the conventional in-pipeline detector or the geometric detector can be completely and visually reflected, and the effective information amount and functions of the detection of the conventional in-pipeline detector or the geometric detector are increased.

Description

technical field [0001] The invention relates to an on-line visual internal detection device and method of a gas transmission pipeline, which is used in the technical fields of natural gas transmission pipelines, operation safety of natural gas pipeline networks, and pipeline internal detection. Background technique [0002] In-line detection of gas pipelines is the most direct, reliable and effective technical means to carry out "physical examination" of the actual quality status of the gas pipeline network in recent years, to discover and locate defects, to evaluate the aging of the body, and to evaluate the effective service. The situation is complex, there are many types of defects in the pipeline body, and there are deficiencies such as complex detection data analysis and identification algorithms, unintuitive output results, and lack of physical reference for defect location. [0003] In addition, there is another type of pipeline video detection crawler (CCTV) technolo...

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Problems solved by technology

[0002] In-line detection of gas pipelines is the most direct, reliable and effective technical means to carry out "physical examination" of the actual quality status of the gas pipeline network in recent years, to discover and locate defects, to evaluate the aging of the body, and to evaluate the effective service. The situation is complex, there are many types of defects in the pipeline body, and there are deficiencies such as complex detection data analysis and identification algorithms, unintuitive output results, and lack of physical reference for defect location.

[0003] In addition, there is another type of pipeline video detection crawler (CCTV) technology that has developed earlier. It is connected by cables or cables in atmospheric pipelines to perform lighting, photography, and video recording inside the off-line pipeline. Cable recovery, usually with a short crawl distance, up to hundreds of meters

This type of pipeline video detection crawler is usually used in municipal pipelines (sewage, drainage, etc.), and also in non-pressurized open oil and gas pipelines. It is used for short-distance detection and identification of the near-mouth end of the pipeline, and cannot be used for long-distance In-service pressurized gas pipeline

[0004] Existing detection technologies in gas pipelines have deficiencies such as complex detection data analysis and recognition algorithms, unintuitive output results, and lack of physical reference for defect location. However, the earlier developed pipeline video detection crawler (CCTV) technology requires external Connecting cables or cables can only be used for short-distance detection and identification at the near end of non-pressurized open oil and gas pipelines, and cannot be used in long-distance in-service pressurized gas pipelines

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