A strong and sealed buried anti-corrosion insulation pipe and its preparation method

Abstract

The invention discloses a strong closed type buried anticorrosive thermal insulation pipe and a preparation method thereof. The thermal insulation pipe is mainly composed of a working pipe, a thermalinsulation pipe and an external protecting pipe, and the working pipe, the thermal insulation pipe and the external protecting pipe are sequentially arranged from inside to outside. The preparation method comprises the steps that S1, after feculence cleaning, leveling and drying treatments are carried out on the surface of the working pipe, and the working pipe is heated and coated with corrosionremovers uniformly; S2, ultraviolet radiation and corona treatment are carried out on the inner and outer surfaces of the external protecting pipe; and S3, the working pipe is nested with a bracket, then the working pipe is preheated, the working pipe with the bracket is sleeved with the external protecting pipe, and a gap between the working pipe and the external protecting pipe is filled with thermal insulation foam. In a word, the strong closed type buried anticorrosive thermal insulation pipe has high corrosion resistance, good thermal insulation effect, long service life, good whole performance, no welding, convenient connection and high practicability, and the leakproofness of the whole structure is guaranteed.

Description

technical field [0001] The invention relates to the technical field of thermal pipeline transmission and production, in particular to a strong and sealed buried anticorrosion heat preservation pipe and a preparation method thereof. Background technique [0002] In the thermal insulation pipes of the central heating system, due to the difference of the heat medium, the common ones are directly buried hot water pipes and steam insulation pipes. Due to the advantages of safe, reliable and convenient construction of hot water direct buried pipelines, it has gained popularity in recent decades. rapid development. At present, the areas with relatively developed central heating in the world are concentrated in Northern Europe. As early as the 1930s, it began to study and apply the heating method of direct buried laying instead of trench laying. Denmark, Sweden, Finland, Germany, Italy and other countries have factories specializing in the production of prefabricated insulation pi...

AI Technical Summary

Problems solved by technology

[0005] The existing thermal insulation pipes are mainly connected together by welding, and human operation errors will inevitably occur during the welding process, resulting in that the seam between the two pipes cannot be completely matched, and there are gaps in the weld between the two pipes. The gap makes the sealing of the insulation pipe poor, and it is prone to liquid leakage when transporting liquids, and even if the sealing of the welding joint is good, the welding joint will be damaged due to aging or long-term exposure to corrosive liquids during long-term use. Contact, the welding place is very easy to loosen and produce gaps. In addition, the insulation pipes welded together are more troublesome to disassemble, the maintenance of the insulation pipes is more troublesome, and the secondary utilization rate is low.

At the same time, the corrosion resistance and heat preservation effect of the traditional heat preservation pipe can still be improved, and the life of the heat preservation pipe can also be extended.

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