A new type of internal rolling drag-reducing steam pipeline

Abstract

The invention discloses a direct-burial steam pipeline, and particularly relates to a direct-burial steam pipeline with a novel inner-rolling structure. The novel inner-rolling resistance-reduction type steam pipeline comprises a working steel pipe, an outer protection steel pipe, a heat preservation layer and a rolling support. The rolling support and the heat preservation layer are arranged between the outer protection steel pipe and the working steel pipe. The rolling support, the heat preservation layer and the outer protection steel pipe are fixed into a whole. A seam is formed between the heat preservation layer and the working steel pipe. The rolling support is composed of a clamping plate, an annular plate, wheels and a rolling shaft, wherein the wheels are installed on the rolling shaft which is fixed to a clamping groove of the annular plate, the annular plate is fixedly connected with the clamping plate, the clamping plate is fixedly connected with the inner wall of the outer protection steel pipe, and the wheels make linear contact with the outer surface of the working steel pipe. The heat transfer of the rolling support is reduced, the pipeline friction resistance is reduced, the problems that the manufacturing process is difficult and the working steel pipe and the heat preservation layer can hardly be completely separated are solved, the integrity of the heat preservation layer is achieved, and the free displacement of the working steel pipe and the safe running of the pipeline are ensured.

Description

technical field [0001] The invention relates to a directly buried steam pipeline, in particular to a directly buried steam pipeline with a novel inner rolling structure. Background technique [0002] The outer rolling structure of the directly buried steam pipeline is that when the working steel pipe undergoes thermal displacement, it and the insulation layer move synchronously as a whole, while the inner rolling structure is the opposite. The working steel pipe and the insulation layer move in relative motion. Compared with the outer rolling structure, the inner rolling structure can make the working steel pipe an independent entity, which can be freely extended or compressed when the pipeline is running or stopped without damaging the insulation material. As far as the existing domestic internal rolling structures are concerned, there are still many difficulties to overcome. difficult problems, such as: how to realize the complete separation of the working steel pipe and t...

AI Technical Summary

Problems solved by technology

Compared with the outer rolling structure, the inner rolling structure can make the working steel pipe an independent entity, which can be freely extended or compressed when the pipeline is running or stopped without damaging the insulation material. As far as the existing domestic internal rolling structures are concerned, there are still many difficulties to overcome. difficult problems, such as: how to realize the complete separation of the working steel pipe and the insulation layer, how to reduce the damage to the insulation layer caused by the thermal displacement of the parent material, how to reduce the heat transfer of the rolling bracket, how to realize the production and batch of the workshop, and how to so that the manufacturing cost will not be greatly increased, etc.

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