Steel sheathed steel steam heat preserving pipeline and lateral displacement sliding support mechanism thereof

Abstract

The invention relates to a steel sheathed steel steam heat preserving pipeline with the nominal diameter of an inner sheathed steel pipe below DN125 and a sliding support mechanism thereof. The mechanism comprises an upper steel hoop, a lower steel hoop, an upper sliding support plate and two lower sliding support plates, wherein the upper sliding support plate is positioned in the center of the upper steel hoop, and the two lower sliding support plates are symmetrically distributed on the lower steel hoop; when the inner sheathed steel pipe is displaced along an axis in an outer sheathed steel pipe, the lower sliding support plates are in contact with the inner wall of an outer steel sheath in a sliding friction way, and an assembly clearance is arranged between the upper sliding support plate and the inner wall of the outer steel sheath. The steel sheathed steel steam heat preserving pipeline comprises the inner sheathed steel pipe, the outer sheathed steel pipe, the sliding support mechanism, heat insulating materials, heat preserving material and a corrosion preventing layer, wherein the corrosion preventing layer is sleeved outside the outer sheathed steel pipe. The invention is just provided with the three sliding support plates and has quite simple process and low cost.

Description

technical field [0001] The invention relates to a heat-insulated steam delivery pipeline, and further relates to a sliding support mechanism for a steel-sheathed steam heat-preservation pipeline with a nominal diameter of an inner steel pipe less than DN125. 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 steam temperature, the thermal deformation of the inner steel pipe is large, which causes the inner steel pipe to float up and down or drift left and right in the outer steel pipe. The general insulation material is difficult to withstand the deformation caused by such a high temperature, resulting in the insulation layer. Damage and heat flow leakage are difficult problems to deal with. ...

AI Technical Summary

Problems solved by technology

Due to the high steam temperature, the thermal 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 insulation layer. Difficult problems of damage and heat leakage

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