Prefabricated directly buried insulation pipe rigid polyurethane concentric device and its manufacturing method

Abstract

The invention relates to a prefabricated directly-buried thermal insulation pipe rigid polyurethane concentric device and a manufacturing method. According to a current domestic prefabricated directly-buried thermal insulation pipe, the technological means that a plastic support, a wood block and other materials are used as supporting concentric parts is adopted between an outer protecting pipe and a working pipeline; according to the most advanced international heat conductivity coefficient requirement, plastic and the wood block both have a heat conduction function, but due to the adoption of the plastic support and the wood block, the thermal insulation effect of polyurethane is destroyed invisibly, the thermal insulation temperature of the polyurethane is decreased, and the heat conductivity coefficient is increased. The prefabricated directly-buried thermal insulation pipe rigid polyurethane concentric device comprises a rigid polyurethane base material body (2) which is in a cylinder shape. The rigid polyurethane base material body is divided into three supporting concentric device blocks A (1) or two supporting eccentric device blocks B (3) with the front end face as the benchmark. The three supporting concentric device blocks A are of the same block-shaped structure, and the two supporting eccentric device blocks B are of symmetrical C-shaped clamping sleeve structures. The manufacturing method is used for the prefabricated directly-buried thermal insulation pipe rigid polyurethane concentric device.

Description

Technical field: [0001] The invention relates to the working field of energy transmission pipelines used in the fields of heating and cooling, in particular to a prefabricated direct-buried rigid polyurethane concentric device for thermal insulation pipes and a manufacturing method thereof. Background technique: [0002] At present, domestic prefabricated direct-buried insulation pipes, between the outer protection pipe and the working pipeline, use plastic brackets, wood blocks and other materials as supporting concentric technical means. According to the most advanced international thermal conductivity requirements, both plastic and wood blocks have heat conduction functions, but The use of plastic brackets and wooden blocks virtually destroys the thermal insulation effect of polyurethane, reduces the thermal insulation temperature of polyurethane, and improves the thermal conductivity. This product adopts a new supporting key technology, which replaces plastic brackets an...

AI Technical Summary

Problems solved by technology

[0002] At present, domestic prefabricated direct-buried insulation pipes, between the outer protective pipe and the working pipeline, use plastic brackets, wood blocks and other materials as supporting concentric technical means, according to the most advanced international Both plastic and wooden blocks have thermal conductivity, but the use of plastic brackets and wooden blocks virtually destroys the thermal insulation effect of polyurethane, reduces the thermal insulation temperature of polyurethane, and improves the thermal conductivity

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