Grinding method applied to inner surface of elbow pipe

Abstract

The invention discloses a grinding method applied to the inner surface of an elbow fitting, comprising the following steps: injecting a working medium into the clamped and fixed petroleum elbow, and inserting a grinding head composed of two semicircular spheres and a runner into the elbow , the working medium quickly flows out from the gap between the grinding head and the inner wall of the elbow, and the flowing working medium drives the runner to rotate freely, and the runner sprays part of the working medium onto the pipe wall in rotation, so as to clean the inner wall of the elbow Auxiliary grinding, the working medium acts on the pipe wall, and the corners or protruding parts on the inner wall of the elbow are sheared and removed by the high-speed movement of the abrasive particles. Iron filings cleaning. Through the adjustment of the two semicircular spheres and the runner, the working medium can fully cover all parts of the elbow, reducing the probability of local protrusions on the inner wall of the elbow, so as to achieve the purpose of improving the service life of the oil pipeline.

Description

technical field [0001] The invention relates to the field of inner surface treatment of bent pipes, in particular to a grinding method applied to the inner surface of bent pipes. Background technique [0002] Pipeline transportation of petroleum has the advantages of high efficiency, low consumption, continuous transportation and high degree of automation. Pipeline transportation has become one of the important forms of current logistics and an indispensable "lifeline" for national economic and social development. Compared with that, the use of pipeline transportation has the following advantages: the safety guarantee rate of pipeline transportation is high, and green transportation can be realized. Oil and natural gas are explosive and volatile items. Into the atmosphere, it may cause an explosion as soon as it encounters Mars, and there are potential safety hazards. Most of the pipelines are buried underground and are less affected by adverse weather conditions and other e...

AI Technical Summary

Problems solved by technology

[0003] Oil pipeline transportation, in addition to the influence of external factors of the pipeline, the roughness of the inner wall of the pipeline will also affect the efficiency of oil transmission, especially the irregular protrusions on the inner surface of the oil bend, which will not only hinder the flow of oil, but also Accelerates the corrosion of oil on pipelines

Traditional pipe wall grinding usually uses abrasive water jet polishing technology, but the grinding head used often rubs against the inner wall of the pipe and is easily eroded by the working medium, which eventually leads to wear of the grinding head and reduces the polishing efficiency of the inner surface of the elbow

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