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

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...

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Problems solved by technology

At the same time, it is inevitable that the geographical information of the pipeline will be leaked abroad, which brings great risks to the safety management of the pipeline.

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