Pipe inner wall polishing method

Abstract

The invention provides a pipe inner wall polishing method. A polishing fluid is injected in a petroleum elbow pipe which is clamped and fixed; a steel rope is connected with a lifting lug; under the drive of a traction device, a polishing mechanism enters the elbow pipe; the polishing fluid flows out rapidly from the gap between the polishing mechanism and the elbow pipe inner wall; the polishing fluid works on the pipe wall and the high speed movement of abrasive particles can cut and remove corners or protrusions on the elbow pipe inner wall; the flowing polishing fluid drives an impeller to rotate freely and the impeller can jet part of the polishing fluid to the pipe wall through rotation; when the polishing fluid hits the pipe wall, scrap iron falling off from the pipe wall is cleaned; two oppositely arranged protection shells can support and protect the impeller during rapid flow of the polishing fluid; flow holes are formed in the protection shells symmetrically and the polishing fluid quickly enters an expanded section; after flowing through a straight and flat section, the speed of the polishing fluid further increases, so that the polishing fluid has a higher momentum when entering the area where the impeller is located.

Description

technical field [0001] The invention relates to a polishing mechanism, in particular to a polishing method for the inner wall of a pipeline. 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 external factors, which can ensure safe...

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 Will accelerate the corrosion of oil on pipelines

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

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