Smart pipeline with optical fiber sensing function and manufacturing method for smart pipeline

Abstract

The invention discloses a smart pipeline structure, which comprises a pipeline, a sensing optical cable and a 3-layer polyethylene (3PE) anticorrosive coating. The pipeline is coated by the 3PE anticorrosive coating. The sensing optical cable is positioned in the 3PE anticorrosive coating, and is laterally wound around the pipeline. The 3PE anticorrosive coating consists of an epoxy powder coating, an adhesive layer and a PE coating layer from inside to outside. The manufacturing method for the smart pipeline comprises the following steps of: performing intermediate-frequency heating on a de-rusted steel pipe; depositing and gelling epoxy powder on the surface of the steel pipe under the promotion of compressed air and the action of an electrostatic field; laterally winding the sensing optical cable around the pipeline under the condition of ensuring the gelled state of the epoxy powder coating; extruding an adhesive by using an extruder, and coating the adhesive on the surfaces of the gelled epoxy powder and the sensing optical cable; and extruding the PE coating layer by using the extruder, adhering the PE coating layer and the adhesive layer in the same way, and performing cooling forming under the action of water cooling. The leakage, corrosion, third-party interference and the like of the pipeline can be online monitored in real time.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing and civil engineering health detection and monitoring methods, and relates to an intelligent pipeline technology that can be used for active, online, real-time monitoring and early warning of various pipelines, especially crossing, damage of bridge pipes, and third-party interference. Background technique [0002] As the fifth largest means of transportation after railways, highways, waterways, and air transportation, pipeline transportation has the advantages of low cost, energy saving, high efficiency, safety and stability in the transportation of liquids, gases, and slurries, and plays an irreplaceable role in the petroleum and chemical fields. On the other hand, with the continuous development and construction of the municipal pipeline network, the urban water supply and gas systems also constitute a very large pipeline network, and the pipeline network has become a vital lifeline...

AI Technical Summary

Problems solved by technology

Existing application examples, technical solutions and products are laid by laying sensing optical cables on new pipelines or along existing pipelines (close to the pipeline surface or in the soil within a certain range around the pipeline), and the laying process is often accompanied by The process of excavation, cable fixing, protection and field testing is complex and requires a lot of manual participation. At the same time, the complex working environment on site may easily cause damage to the sensing cable.

The above factors lead to many problems to be solved in the application of this technology, such as the difficulty in laying the sensing optical fiber along the pipeline, the poor durability and easy damage of the optical cable laid on site, and the damage of some sensing optical cables before they are put into use, resulting in false alarms, etc.

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