Natural gas long-distance pipeline three-dimensional high-definition magnetic leakage internal detection apparatus

A technology for long-distance pipelines and detection devices, applied in the direction of material magnetic variables, etc., can solve problems such as pipeline safety management risks and pipeline geographic information leakage.

Inactive Publication Date: 2013-08-07
国家管网集团西部管道有限责任公司
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Problems solved by technology

At the same time, it is inevitable that the geographical information of the pipeline...

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  • Natural gas long-distance pipeline three-dimensional high-definition magnetic leakage internal detection apparatus

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Embodiment Construction

[0022] The present invention is further described in conjunction with the accompanying drawings, and examples are given;

[0023] The three-dimensional high-definition magnetic flux leakage internal detection device of a long-distance natural gas pipeline according to the present invention is composed of an upper and lower frame, a leakage bypass valve system, a mileage wheel system, an excitation detection unit, a main probe, a universal joint, and a sealing skin. The bowl, the cavity, the universal connector and the inner and outer distinguishing probe are composed of the leakage bypass valve system. The discharge bypass valve 4 is fixed on the discharge bypass valve holder 12, and the lower end of the discharge bypass valve 4 is connected with the discharge regulating valve vertebral body 10, on both sides of the discharge bypass valve 4 There is a drain hole 11, and the drain bypass valve seat 12 is fixed in the cavity of the upper frame; the mileage wheel system is compos...

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Abstract

The invention relates to a natural gas long-distance pipeline three-dimensional high-definition magnetic leakage internal detection apparatus. The apparatus is composed of upper and lower frames, a venting bypass valve system, odometer wheel systems, an exciting detection unit, a main probe, a universal joint, a sealing rubber cup, a battery cavity, a universal coupling, and internal and external distinguishing probes. When the apparatus is used, the venting bypass valve system is mainly used for completing the adjustment of the travelling speed of the apparatus in a pipeline during the running of a detector in the gas convey pipeline in order to realize the transient speed control and the speed control under stationary running; the odometer wheel systems are used for realizing the gravity support of the internal detector in order to guarantee the positioning of the apparatus in the center of the pipeline; the sealing rubber cup guarantees the close contact of the internal detector and the inner wall of the gas convey pipeline to block the flow of a natural gas fluid and generate the travel thrust of the internal detector in order to drive the whole apparatus to forward; the exciting detection unit realizes the magnetization of the wall of the pipeline and the measurement through utilizing the above probes; and a movement contains a acquisition system to realize the acquisition and storage of flaw detection data. The apparatus has the advantages of simple structure, convenient installation and use, and high measure precision.

Description

technical field [0001] The invention relates to a three-dimensional high-definition magnetic leakage internal detection device of a Φ1219 gas transmission pipeline, which is suitable for the internal detection of a Φ1219 long-distance natural gas transmission pipeline. Background technique [0002] The Second West-East Gas Pipeline (Φ1219) is my country's first high-pressure, large-diameter gas pipeline. It starts from Horgos Port in the west and connects to the Central Asia Natural Gas Pipeline spanning Turkmenistan, Uzbekistan and Kazakhstan in the west. It reaches Hong Kong and Shanghai in the east, passing through 14 provinces, municipalities directly under the Central Government, autonomous regions and the Hong Kong Special Administrative Region. It is an important channel connecting China and Central Asia. have important strategic significance. [0003] MFL pipeline internal detection is the only online detection method to detect pipeline weld corrosion, interlayer cor...

Claims

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Application Information

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IPC IPC(8): G01N27/83
Inventor 闵希华杨理践陈勇伍奕饶心黄忠胜杨洲张广齐杨永和庞贵良肖连徐春燕贾海东耿丽媛
Owner 国家管网集团西部管道有限责任公司
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