Novel directly buried thermal insulation pipe

Abstract

The invention provides a novel directly buried thermal insulation pipe, and relates to the building field. The novel directly buried thermal insulation pipe comprises an outer protective pipe, a thermal insulation layer and a work steel pipe; the thermal insulation layer is arranged on the inner side of the outer protective pipe, and the work steel pipe is arranged on the inner side of the thermal insulation layer; the outer protective pipe is a polyethylene outer protective pipe. According to the novel directly buried thermal insulation pipe, heat loss caused by a thermal bridge can be effectively avoided in an operation process of a pipe network, the thermal insulation effect, production efficiency and the percent of pass of finished products are guaranteed better, foam is even, the number of cavities of the thermal insulation layer of the pipe is reduced, heat loss is reduced, thermal energy is utilized to the maximum degree, and service life of the thermal insulation pipe is prolonged.

Description

Technical field: [0001] The invention relates to the field of construction, in particular to a novel direct-buried thermal insulation pipe produced and prefabricated in one step. Background technique: [0002] The prefabricated direct-buried thermal insulation pipe is a kind of direct-buried prefabricated thermal insulation pipe with good thermal insulation performance, safety and reliability, and low engineering cost. It effectively solves the problems of thermal insulation, sliding lubrication and waterproofing of exposed pipe ends for prefabricated direct-buried thermal insulation pipes for 130°C-600°C high-temperature heat transfer in urban central heating. High-temperature prefabricated direct-buried thermal insulation pipes not only have advanced technology and practical performance that are incomparable to traditional trenches and overhead laying pipelines, but also have significant social and economic benefits, and are also a powerful measure for heating and energy s...

AI Technical Summary

Problems solved by technology

[0003] However, the prefabricated direct-buried thermal insulation pipes cannot effectively avoid the heat energy lost by the thermal bridge during the operation of the pipe network, and cannot guarantee the thermal insulation effect, production efficiency and finished product qualification rate very well. The heat loss is large, resulting in a short working life of the thermal insulation pipes.

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