Stretching and retracting metal reflection type heat preservation unit

Abstract

The invention discloses a stretching and retracting metal reflection type heat preservation unit and belongs to the technical field of nuclear power pipeline and equipment heat preservation. The heat preservation unit comprises two semicircular unit block bodies. Each unit block body is formed by an end convex heat preservation block, an end concave heat preservation block and a radial convex heat preservation block in an embedded manner, wherein the outer end of the end convex heat preservation block and the outer end of the end concave heat preservation block extend in the radial direction of a circular pipe axis to form end faces and then extend outwards and inwards correspondingly to form an end face protrusion and an end face concave part which are matched; an axial moving pair is formed between the outer circle of the radial convex heat preservation block and the inner circle of an outer pipe segment, an outer circle of at least one of the end convex heat preservation block and the end concave heat preservation block extends in the axial direction to form a semi-arc outer cover plate, and an inner hole of at least one of the end convex heat preservation block and the end concave heat preservation block extends in the axial direction to form a semi-arc inner cover plate; and the heat preservation blocks are made of shells which are internally filled with a plurality of metal foil reflection heat preservation layers which are distributed at intervals in the radial direction. The heat preservation unit can change in an adaptive manner within a certain range according to installation needs, and the heat preservation needs can be met through the embedded relation among the heat preservation blocks.

Description

technical field [0001] The invention relates to a thermal insulation block, in particular to a stretchable metal reflective thermal insulation unit, which belongs to the technical field of nuclear power pipeline and equipment thermal insulation, and can be popularized and applied in thermal power, chemical industry, petroleum and other fields. Background technique [0002] Many pipes and equipment in nuclear power plants operate under high-temperature conditions. In order to reduce heat loss and ensure that the temperature and thermal stress of the concrete wall of the nuclear power plant meet the design requirements, the outer walls of high-temperature pipes and equipment must be covered with insulation layers. Due to the high radioactivity in the implementation of nuclear power, non-metallic insulation materials used in conventional industrial pipelines and equipment are not suitable for nuclear power applications. The main reason is that non-metallic insulation materials w...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a stretchable metal reflective heat preservation unit that can adapt to changes in the length and size of pipes and equipment on the premise of ensuring heat preservation performance, so as to properly solve the problem of difficulty in installing the heat preservation layer or shortage of dimensions

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