Arced vacuum heat insulation composite plate and manufacturing method thereof

Abstract

The invention discloses an arced vacuum heat insulation composite plate and a manufacturing method thereof. The arced vacuum heat insulation composite plate is characterized by comprising three layers, wherein the middle layer is a vacuum heat insulation plate, and two sides are heat-conservation organic foam; the organic foam is polyurethane foam and polypropylene foam; the polyurethane foam is composed of single-component polyurethane and double-component polyurethane; wherein the single-component polyurethane is used for wrapping the vacuum heat insulation plate to obtain a soft composite plate; and the double-component polyurethane is used for wrapping the vacuum heat insulation plate to obtain a hard composite plate. The arced vacuum heat insulation composite plate has the advantages that the heat conduction coefficient of a heat conservation layer material is relatively lower than the conventional heat conservation material, so that the thickness of the heat conservation layer is reduced greatly, the increase of the pipeline load caused by the pipeline temperature unevenness is avoided, and the service life of a pipeline is prolonged; meanwhile, the procedure that raw petroleum in a seabed petroleum transmission pipeline of which the heat conservation layer is made of the conventional heat conservation material can be heated at each certain distance so as to keep the flowability is omitted; the energy consumption is reduced; and working procedures are simplified.

Description

technical field [0001] The invention relates to a composite panel and a manufacturing method thereof, in particular to an arc-shaped vacuum heat-insulating composite panel and a manufacturing method thereof. Background technique [0002] With the increasing scope of offshore oil and gas exploitation, the continuous growth of consumption demand for clean energy represented by natural gas in various countries around the world, and the continuous improvement of urban heating systems, the society is demanding various pipelines such as oil pipelines, natural gas pipelines, and urban heat pipelines. The demand for it is increasing, and its requirements, especially the requirements for pipeline insulation materials, are becoming more and more stringent. [0003] Holland Semaflex International Holdings Co., Ltd. discloses a pipe insulation layer made of polyolefin heat-insulating foam and a manufacturing method thereof in a Chinese invention patent with a publication number of 00820...

AI Technical Summary

Problems solved by technology

But they all have the following deficiencies: (1) the thermal conductivity is not low enough, resulting in a large thickness of the insulation layer, which brings difficulties for the production of the mold and is not conducive to construction; (2) the compressive strength is low and easy to damage; (3) ) The closed cell rate cannot reach 100%, and there must be a reliable waterproof protective layer on the outside

It is obvious: (1) In this case, there is still the shortcoming that the insulation layer is too thick; (2) The insulation performance is uneven, causing some parts to freeze; even if the electric heat tracing method is used to alleviate this phenomenon, the electric heat tracing The need for permanent power supply will undoubtedly cause a great loss of energy consumption, which is not in line with the theme of energy conservation in today's world; (3) uneven temperature of the pipeline will also increase the load of the pipeline and accelerate the attenuation of its performance

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