Production line for producing prefabricated plastic insulation pipeline through one-step method

Abstract

The invention discloses a production line for producing a prefabricated plastic insulation pipeline through a one-step method. The production line comprises an extrusion device used for extrusion forming of a work inner pipe, a shaping and cooling device used for shaping and cooling the work inner pipe, a continuous foam forming device used for wrapping the work inner pipe with an insulation layer in a continuous foaming mode, an outer covering device used for continuously attaching an outer protective layer to the insulation layer, and a pulling device used for pulling the plastic insulation pipeline, wherein the extrusion device, the shaping and cooling device, the continuous foam forming device, the outer covering device and the pulling device are arranged in sequence. The extrusion device comprises a plastic extruder and a forming mold installed on the plastic extruder and used for forming the work inner pipe. The shaping and cooling device comprises a negative-pressure shaping box and a cooling device, and the negative-pressure shaping box and the cooling device are integrally arranged. A shaping mold used for shaping the work inner pipe is arranged in the negative-pressure shaping box. The continuous foam forming device comprises a foaming machine and an insulation layer forming device used for continuously wrapping the work inner pipe with the insulation layer. By the adoption of the production line for producing the prefabricated plastic insulation pipeline through the one-step method, continuous production of the plastic insulation pipeline can be achieved.

Description

technical field [0001] The invention relates to a production line of plastic thermal insulation pipes, in particular to a production line for producing prefabricated plastic thermal insulation pipes in one step. Background technique [0002] Traditional heat pipes are generally composed of steel working inner pipes, anti-corrosion layers, insulation layers and protective layers. A bracket is installed between the steel pipe straight pipe and the protective outer pipe to maintain the coaxial state between the steel pipe straight pipe and the protective outer pipe, and then the insulation layer is poured. Therefore, due to the structural characteristics of the existing thermal pipeline, only one section of straight pipe can be produced at a time, and it is connected by section-by-section electric welding at the time of production and installation. In recent years, some prefabricated heat pipe products, such as a plastic working pipe prefabricated direct-buried composite therm...

AI Technical Summary

Problems solved by technology

[0003] Since the existing thermal pipelines are all produced by section-by-section filling, there is no continuous production line specifically for thermal pipelines, that is, the existing thermal pipeline production equipment cannot achieve continuous production of thermal pipelines, and it needs to be installed step by step during construction and installation. Sectional installation not only leads to low production efficiency, but also leads to low construction and installation efficiency, and the many connection points between various sections of thermal pipelines cause safety hazards in the heating pipeline system

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