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 steel steam insulation pipe is DN 250-DN 500. The rolling supporting mechanism comprises an upper steel hoop, a lower steel hoop, two upper idler wheels and two lower idler wheels, wherein the upper idler wheels and the lower idler wheels are respectively arranged on the upper steel hoop and on the lower steel hoop and distributed symmetrically; the end parts of the upper steel hoop and the lower steel hoop are clamped tightly by bolts; and when the axes of the inner sleeve steel pipe and an outer sleeve steel pipe are overlapped, the two lower idler wheels and the inner wall of the outer sleeve steelpipe are contacted in a rolling friction way, and fit-up gaps are left between the upper idler wheels and the inner wall of the outer sleeve steel pipe. The steel-sleeve steel steam insulation pipe comprises the inner sleeve steel pipe, the outer inner sleeve steel pipe, the rolling supporting mechanism, insulation material and heat-preservation material, wherein the external diameter of the heat-preservation layer is smaller than the internal diameter of the outer sleeve steel pipe and an air layer is formed between the heat-preservation layer and the sleeve steel pipe. The rolling supportingmechanism 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 DN250-DN500 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. The general insulation material is difficult to withstand the deformation caused by such a high temperature, resulting in the destruction of the insulation layer. and the difficult pr...

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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. The general insulation material is difficult to withstand the deformation caused by such a high temperature, resulting in the destruction of the insulation layer. and the difficult problem of heat flow leakage

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