Quick plugging method for fuel pipeline

Abstract

The invention relates to a quick plugging method for a fuel pipeline. The quick plugging method includes the following steps that front and back isolating valves of a leaked pipe section are closed, and a blow-down valve is opened to discharge oil stored in a pipeline; after water is injected into the pipe, the pipe section required to be replaced is sawed off manually; after the pipeline is broken, a specially-designed pipe plug is used for plugging the pipe, and water is injected into the pipelines at the two ends through the pipe plug; after a local small space, formed by the pipe plug andfractures, in the pipe is washed by the aid of a detergent, gas detection is performed, and a flange is welded at each of the front fracture and the back fracture after the space is qualified; and after the to-be-replaced pipeline is matched with the welded flanges, the pipe plug is dismounted, water stored in the pipeline is completely discharged, the flanges are fixed, and operation is restored.The quick plugging method has the advantages that according to the plugging method, through cooperation of the procedures of pretreatment, pipe section cutting, pipe section plugging, cleaning and detection as well as pipe section replacement, the pipeline washing range is shortened, the pipeline is isolated from the whole fuel pipeline, and on the basis that the safety is guaranteed, the leakedfuel pipeline is plugged quickly and permanently.

Description

technical field [0001] The invention relates to the field of power generation equipment maintenance, in particular to a method for quickly blocking a fuel pipeline. Background technique [0002] Fuel pipelines are pipelines responsible for transporting fuel. The common ones are petrochemical pipelines and natural gas pipelines: petrochemical pipelines are generally used as pressure transportation pipelines for flammable, explosive, high-temperature, high-pressure, or low-temperature toxic substances. Pipeline construction is technically difficult, Due to the large amount of engineering and the large number of welding joints in the pipeline, it is easy to have welding quality problems, which will cause the leakage of petrochemical fuels, which not only endangers the surrounding ecological environment, but even threatens people's life safety; the composition of natural gas pipelines includes two The main part is the chemical operation pipeline composed of pipelines and pipelin...

AI Technical Summary

Problems solved by technology

[0004] The pressure sealing method is a temporary treatment method. After a long time, it may leak again and cannot achieve the effect of permanent sealing.

[0005] Welding method, if repair welding directly on the fuel pipeline, there is a risk of deflagration, and welding after water flushing, because the pipeline is long, so the water flushing time is longer, and the entire cycle is longer, generally more than one week, which cannot meet the requirements of rapid recovery. Conditions affect the normal oil consumption of power plant units; and the sludge deposited in the pipeline is not easy to be washed away, and the residual oil gas will cause deflagration during welding; welding after steam washing requires a new line of steam, which increases new work and time also longer

Images