Inservice underground pipe line on-line internal coating protection construction equipment

Abstract

The invention relates to an in-service underground pipeline online internal coating protection construction process and a special equipment thereof. The construction process comprises the pre-processing of the pipeline, the construction of a plugging layer and the coating of the underlayer and the surface layer of an internal anticorrosion coating; the construction of the plugging layer comprises that a rendering of the plugging layer is applied in the pipeline, so as to plug up leaks and cracks; an enclosing disposal is carried out on the micropores and micro-cracks on the surface of the plugging layer; a diluted plugging layer micropore enclosing coating is applied on the surface of the dried plugging layer; the coating of the underlayer and the surface layer of the internal anticorrosion coating comprises that an internal anticorrosion coating underlayer is coated after the surface of the liner enclosing coating is dried, and an internal anticorrosion coating surface layer is finally coated after the surface of the underlayer coating of the internal coating is dried. The special equipment comprises a pipeline cleaning equipment, an online internal coating equipment and an internal coating quality detecting equipment. The invention is suitable for the plugging repair of used low pressure pipelines, the online construction of internal coatings, the plugging repair of urban coal gas pipelines; the plugging repair of urban water supply pipeline and the plugging repair of oilfield sewage pipelines.

Description

[0001] This application is a divisional application of the Chinese invention patent application. The application date of the original application: April 30, 2005, the application number: 200510046362.5, the name of the invention: the construction process and special equipment for the online inner coating protection of underground pipelines in service, Publication number: CN1858477A; During the patent examination process, this divisional application was filed because the hot extrusion method and the special mold in the original application did not belong to a general inventive concept. technical field [0002] The invention relates to the repair technology of in-service underground pipelines, in particular to an in-service underground pipeline in-line coating protection construction equipment. Background technique [0003] The oil, gas and water pipelines in service generally suffer from severe corrosion, scaling and early corrosion and cracking, which seriously affect normal ...

AI Technical Summary

Problems solved by technology

[0012] Among them, the airflow coating method and the hose coating method need to be coated and hose coated under elevated temperature conditions, the process and tooling equipment are complex, and the construction cost is high; moreover, it cannot be used for online construction of long-distance pipelines at room temperature

The hose coating method still cannot prevent the further development of the existing localized corrosion perforation and corrosion cracking

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