Double-vacuum layer metal composite vacuum insulation plate and preparation method thereof

Abstract

The invention discloses a double-vacuum layer metal composite vacuum insulation plate. The double-vacuum layer metal composite vacuum insulation plate comprises a panel, a connecting layer and a vacuum cavity, and is characterized in that the panel is a metal plate or a metal composite plate; the panel and/or the connecting layer provide the additional strength to the vacuum cavity, and guarantee the flatness of the vacuum cavity under atmospheric pressure; the vacuum cavity is a closed cavity formed by performing the welding edge sealing under normal pressure and the high-temperature opening sealing under vacuum for the metal plate; the opening sealing is a step that an extraction opening prefabricated in the vacuum cavity is automatically sealed in a vacuum furnace by using a low-temperature solder according to a liquid sealing principle; the low-temperature solder comprises a low-temperature metal and an alloy solder; a spacing plate is arranged in the vacuum cavity for dividing the inside of the vacuum cavity into double vacuum layers; and support objects are arranged in the vacuum layers. A preparation method of the double-vacuum layer metal composite vacuum insulation plate is simple in process; and the prepared double-vacuum layer metal composite vacuum insulation plate can overcome the defects of a traditional insulation plate and a traditional vacuum insulation plate, and can be improved in strength, heat insulation, sound insulation and fire prevention performance.

Description

technical field [0001] The invention relates to the technical field of building energy conservation, in particular to a double-vacuum-layer metal composite vacuum heat insulation board and a manufacturing method thereof. Background technique [0002] my country's building energy consumption has accounted for more than 1 / 3 of the energy consumption of the whole society, and it is increasing year by year. The use of thermal insulation building materials is one of the main means to reduce building energy consumption. At present, many materials used for building exterior wall insulation are Class B insulation materials, such as polystyrene, polyurethane, foam rubber and other organic materials. These organic materials have poor heat resistance and are easy to burn. A large amount of toxic smoke can accelerate the spread of the fire; at the same time, organic materials will shrink during a fire, producing burning droplets, causing the tiles on the insulation layer to fall off, wh...

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Problems solved by technology

At present, many materials used for building exterior wall insulation are Class B insulation materials, such as polystyrene, polyurethane, foam rubber and other organic materials. These organic materials have poor heat resistance and are easy to burn. A large amount of toxic smoke can accelerate the spread of the fire; at the same time, organic materials will shrink during a fire, producing burning droplets, causing the tiles on the insulation layer to fall off, which may cause secondary fires and secondary fires. harm, so the relevant state departments explicitly prohibit the use of organic insulation materials for external wall insulation, especially in high-rise buildings and public buildings

Among the thermal insulation materials whose combustion performance reaches the A-level standard, inorganic materials represented by mineral wool and rock wool are mainly used. However, the existing domestic products have a large gap with the requirements of architectural applications in terms of water absorption, strength, and weather resistance. If it is directly used for building wall insulation, there will be problems such as water absorption, falling, softening, etc.

In addition, the cost of Class A thermal insulation materials is much higher than that of organic materials, and the construction process is complicated. The construction cost far exceeds the cost of Class B thermal insulation materials, and its thermal insulation performance is poor and energy consumption is high, which cannot meet the current needs of the country for energy conservation and emission reduction.

[0003] Vacuum insulation panels are a new type of insulation material developed in recent years, mainly including vacuum bags and core materials. There are obvious disadvantages such as difficulty in drying the core material, poor air tightness of the vacuum bag, low puncture resistance strength, fast vacuum decay, easy bag expansion, short heat preservation life, etc.

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