Steel-sleeve steel steam insulation pipe and rolling supporting mechanism thereof

Abstract

The invention relates to a steel-sleeve steel steam insulation pipe and a rolling supporting mechanism thereof, wherein the nominal diameter of an inner sleeve steel pipe of the steel-sleeve steam insulation pipe is DN 600-DN 700. The rolling supporting mechanism comprises an upper steel hoop, a lower steel hoop, two upper idler wheels arranged on the upper steel hoop and distributed symmetrically, and four lower idler wheels arranged on the lower steel hoop and distributed symmetrically, wherein the four lower idler wheels are evenly divided into two groups; the end parts of the upper steel hoop and the lower steel hoop are connected by bolts; and when the axes of the inner sleeve steel pipe and an outer sleeve steel pipe are overlapped, the four lower idler wheels and the inner wall of the outer sleeve steel pipe are contacted in a rolling friction way, and gaps are left between the two upper idler wheels and the inner wall of the outer sleeve steel pipe. The steel-sleeve steel steaminsulation pipe comprises the rolling supporting mechanism and also comprises insulation material positioned between the rolling supporting mechanism and the inner sleeve steel pipe, heat-preservation material with the external diameter smaller than the internal diameter of the outer sleeve steel pipe, an air evaporation valve arranged on the outer sleeve steel pipe, and erosion resistant coatingsleeved outside the outer sleeve steel pipe. The rolling supporting mechanism has small friction force, therefore, the stress of the rolling supporting mechanism and the inner sleeve steel pipe is reduced.

Description

technical field [0001] The invention relates to a heat-insulating steam delivery pipeline, and further relates to a steel-sheathed steel steam heat-preservation pipeline with a nominal diameter of an inner steel pipe of DN600-DN700 and a rolling support mechanism thereof. Background technique [0002] Steel-sheathed steel steam insulation pipeline is a new technology developed in recent years, which is used to transport high-temperature steam (250-350°C). Its structure basically includes an inner steel pipe and an outer steel pipe, and some insulation materials are filled in the middle. Due to the high temperature of the steam, the deformation of the inner steel pipe is relatively large, which causes the inner steel pipe to float up and down or drift left and right inside the outer steel pipe. It is difficult for ordinary insulation materials to withstand the deformation caused by such a high temperature, resulting in The damage and heat flow leakage are difficult to solve....

AI Technical Summary

Problems solved by technology

Due to the high temperature of the steam, the deformation of the inner steel pipe is relatively large, which causes the inner steel pipe to float up and down or drift left and right inside the outer steel pipe. It is difficult for ordinary insulation materials to withstand the deformation caused by such a high temperature, resulting in The destruction and heat flow leakage are intractable problems

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