A kind of insulation pipe and its preparation method

Abstract

The invention provides a thermal insulating pipe and a manufacturing method of the thermal insulating pipe. The thermal insulating pipe is composed of a crosslinked polyethylene layer, a polyethylene thermal insulating layer and an ultraviolet radiation resisting polyethylene layer which are arranged from inside to outside in sequence, wherein an electric heating device is arranged between the crosslinked polyethylene layer and the polyethylene thermal insulating layer. Compared with the existing split-type single piece water conveying thermal insulating pipe, the thermal insulating pipe is an integer composed of the crosslinked polyethylene layer, the polyethylene thermal insulating layer, the ultraviolet radiation resisting polyethylene layer and the electric heating device; firstly, the aging resistance performance of the thermal insulating pipe is improved by the ultraviolet radiation resisting polyethylene layer; secondly, as the thermal insulating pipe is an integer, no thermal insulating materials need to be wrapped, so that the use is convenient, and the working quantity during the installation process is reduced; thirdly, as the electric heating device is added, the electric heating can be carried out, so that the liquid is prevented from being refrozen in a low temperature environment; and moreover the crosslinked polyethylene layer is used as the inner layer of a water conveying pipe, and crosslinking can be carried out slowing by using the heat of the liquid, thus the heat-resisting oxidation susceptibility of the water conveying pipe is improved.

Description

technical field [0001] The invention belongs to the technical field of pipes, and in particular relates to a thermal insulation pipe and a preparation method thereof. Background technique [0002] There are two types of pipes (such as water pipes or air pipes) that do not require insulation and those that require insulation (that is, insulation pipes). The former is a commonly used pipe, such as a water pipe. The role of transportation; the latter is a special-purpose pipeline, such as hot water supply pipes, cold water supply pipes, steam pipes, etc. Existing thermal insulation pipes are made of the same material as ordinary pipes, the main material is steel or plastic, but both materials have the same problem, that is, the faster heat transfer, the energy of the medium (such as water or gas, etc.) in the pipe ( Heat or cold) is dissipated into the air through the heat transfer of the pipeline, resulting in large energy loss, resulting in energy waste, and is not conducive...

AI Technical Summary

Problems solved by technology

Existing thermal insulation pipes are made of the same material as ordinary pipes, the main material is steel or plastic, but both materials have the same problem, that is, the faster heat transfer, the energy of the medium (such as water or gas, etc.) in the pipe ( Heat or cold) is dissipated into the air through the heat transfer of the pipeline, resulting in large energy loss, resulting in energy waste, and is not conducive to environmental protection

[0003] The solution to heat preservation is mainly to cover the outside of the pipe with a layer of heat preservation layer. The disadvantage of this method is that: the installation is more troublesome, and the heat preservation layer needs to be temporarily covered; gaps, the effect of the heat preservation is not ideal, and there is still a large energy leakage; due to the energy leakage, it is not safe enough, especially in the case of damage to the insulation layer, it is easy to cause safety accidents such as burns or frostbite. Shorten the service life of the insulation pipe

The foamed pipe formed in this way is expensive because the inner pipe is a steel pipe, and continuous production cannot be achieved, resulting in low quality, high cost, easy rusting of the steel pipe, and low service life.

[0005] At present, the water-transfer insulation pipe used in solar water-conveyance water heaters is still a split single-piece type, that is, the inner pipe is made of high-density polyethylene and wrapped with polyethylene insulation material outside, and then wrapped and fixed with adhesive tape. Labor intensity, and the tape used for fixing is easy to age due to ultraviolet radiation, and the skin is brittle, causing the insulation material to fall off

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