Steel-sleeve-steel steam thermal insulation pipe

Abstract

The invention discloses a steel-sleeve-steel steam thermal insulation pipe. The steel-sleeve-steel steam thermal insulation pipe comprises an outer steel pipe, a thermal insulation layer, a bottom support, a hard asbestos insulation pad and a working steel pipe; the thermal insulation layer is arranged on the bottom support; a sliding support which can move vertically or horizontally is arranged between the thermal insulation layer and the hard asbestos insulation pad; the sliding support is formed by an upper support and a lower support; two ends of the upper support and the lower support are provided with bolt holes and rib plates; the upper support and the lower support are connected with bolts through the bolt holes respectively; a base is fixedly arranged on the lower support. According to the steel-sleeve-steel steam thermal insulation pipe which is an automatic stamping die, the working steel pipe is supported through the sliding support and accordingly the working steel pipe can smoothly run inside the outer steel pipe, the enough space around the working steel pipe is ensured, the thickness of the thermal insulation layer is ensured, the working steel pipe can expand and shift under the action of expansion and contraction, and the axial movement and the vertical movement of the working steel pipe can be ensured through the sliding support.

Description

technical field [0001] The invention relates to a steel-sheathed steel steam heat preservation pipe. Background technique [0002] At present, in the existing steel-sheathed steel steam insulation pipe, due to the characteristics of thermal expansion and cold contraction of the steel pipe, when the steel pipe is heated and expanded, the steel pipe will squeeze the hard asbestos heat insulation board, resulting in deformation and enlargement of the insulation layer; The steel pipe is pre-cooled, the steel pipe shrinks, one big and one small make the steel pipe not run smoothly, and the space around the steel pipe is reduced, and the insulation layer is reduced. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a structure that is simple, easy to install, and can ensure that the working steel pipe can run smoothly inside the outer protective steel pipe. [0004] In order to solve the above problems, the present inve...

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Problems solved by technology

[0002] At present, in the existing steel-sheathed steel steam insulation pipe, due to the characteristics of thermal expansion and cold contraction of the steel pipe, when the steel pipe is heated and expanded, the steel pipe will squeeze the hard asbestos heat insulation board, resulting in deformation and enlargement of the insulation layer; The steel pipe is pre-cooled, the steel pipe shrinks, one large and one small lead to the unsteady operation of the steel pipe, and the space around the steel pipe is reduced, and the insulation layer is reduced

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