Vacuum insulation sleeve

Abstract

The invention provides a vacuum heat-insulating sleeve, comprising an inner pipe and an outer sleeve. The inner pipe is supported on the inner wall of the outer sleeve through an inner support, the inner support comprises a hoop encircling the outer surface of the inner pipe and a plurality of elastic supports, an heat-insulating layer is disposed between the hoop and the outer surface of the inner pipe, the elastic supports are fixed on the hoop and extend outward in a radial direction, and the ends of the elastic supports are supported on the inner wall of the outer sleeve. Only by providing the heat-insulating layer between the hoop and the outer surface of the inner pipe, can heat conduction between the inner pipe and the outer sleeve by the inner support be avoided; therefore, not only can the consumption of the thermal insulation material be greatly reduced, but also better heat insulation effect can be achieved. The vacuum heat-insulating sleeve is convenient to install; only pre-fixing of the hoop and the elastic supports on the inner pipe is needed so as to be inserted into the outer sleeve, no strict centering and aligning is required, thus the installation difficulty is lower, and the installation period is greatly shortened.

Description

technical field [0001] The invention relates to the technical field of vacuum heat insulation sleeves, in particular to a vacuum heat insulation sleeve composed of an inner tube supported in an outer sleeve. Background technique [0002] When the medium circulating in the steel pipe is a high-temperature or low-temperature medium, in order to maintain the original temperature of the medium, it is necessary to wrap the outer wall of the steel pipe with an insulating layer or use a vacuum sleeve or other means for heat insulation treatment, and at the same time, it is necessary to consider the influence of the temperature of the steel pipe The physical change of self-expansion with heat and contraction with cold. Among them, the heat insulation effect of the vacuum sleeve is the best. [0003] The main structural form of the existing vacuum sleeve is: on the outer wall of the inner tube, three welded brackets are distributed intermittently along the circumferential direction,...

AI Technical Summary

Problems solved by technology

The disadvantages of such a structural form are mainly: 1. Since the inner tube and the outer tube are in direct contact through brackets and brackets, complete heat insulation cannot be achieved, so it is necessary to wrap a heat insulating layer on the entire outer wall of the outer tube, not only Waste heat insulation materials, and the heat insulation effect is not good; 2. Due to the long length of the inner pipe and the outer pipe, it is necessary to set up multiple sets of brackets and brackets, which makes the centering installation of the inner and outer pipes very difficult

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