Swirling-eddy-method pipeline inwall fouling cleaning, rust removing and coating corrosion preventing technology

Abstract

A swirling-eddy-method pipeline inwall fouling cleaning, rust removing and coating corrosion preventing technology is formed through accumulation of several years of construction experience and unceasing research and development based on two patents of a high-pressure gas pipeline and water pipeline fouling removing and wall protecting method and a large and middle-sized pipeline inwall rust and fouling removing and paint film corrosion preventing method, and the efficiency is improved by 2-3 times. The invention relates to inwall fouling cleaning, rust removing and coating corrosion preventing of various pipelines and inwall coating pre-corrosion preventing of new-laid pipelines in the fields such as urban water supply and drainage, heating, fuel gas, petroleum and chemical engineering. The problems that original patients are narrow in application range and poor in control capability are solved, and the construction problems that in traditional non-excavation technologies, pipeline turning, reducing, perpendicularity, branching and the like cannot be treated are overcome. The swirling-eddy-method pipeline inwall fouling cleaning, rust removing and coating corrosion preventing technology has the beneficial effects that fouling is cleaned more thoroughly, coatings are more uniform and compacter, the adhesive force is stronger, the efficiency is higher and the labor cost is at least reduced by 50% or above. Close construction is carried out, and safety and environmentally friendliness are achieved.

Description

[0001] The "rotating air flow method" cleaning and rust removal of the inner wall of the pipeline, and the coating anti-corrosion technology are based on our "High-pressure gas and water pipeline cleaning and wall protection method" (Chinese patent authorization number: ZL02110830.7), "Large and medium-sized pipeline inner wall cleaning Rust descaling and coating film anticorrosion method" (Chinese patent authorization number: ZL200510024090.9) and our patents in the United States and Canada, based on years of experience accumulation and continuous research and development, improvement, the efficiency has increased by 2-3 times. technical field [0002] The invention relates to the technical field of scale and rust removal, coating anti-corrosion and coating pre-corrosion of the inner wall of newly laid pipelines in various fields such as urban water supply and drainage, heating, gas, fire protection, petroleum, chemical industry and so on. In particular, it relates to a new m...

AI Technical Summary

Problems solved by technology

PIG cleaning technical requirements: 1) Pipelines with a pipe diameter greater than DN50; 2) The radius of curvature of the pipe diameter elbow is not less than 1.5 times the pipe diameter; 3) The maximum deformation of the pipe diameter is not greater than 20% of the pipe diameter; 4) On the pipeline The shut-off valve should be a ball valve or a flat gate valve; 5) The inner diameter of the pipeline accessories on the pipeline should be the same as the inner diameter of the pipeline; 6) The temperature of the pipeline transmission medium should not exceed 70°C; 7) The cleaning of hard rust is not thorough; 8) No pipe repair function

[0005] The above-mentioned common pipeline repair methods, although they have pipeline repair functions, all have their own technical bottlenecks and problems that cannot be overcome. Difficulties such as branches and small-bore pipelines

[0006] If it is necessary to excavate and replace the old pipelines, it will inevitably cause many inconveniences in production and life due to the destruction of roads and pavement, suspension of production and transportation, etc.

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