| abstract |
The invention proposes a double vacuum insulation device for an ultra-low temperature liquefied gas storage tank, which includes a tank, a surface of the tank is provided with a plurality of vacuum cavities, and a mesh cloth layer is arranged on the outside of the vacuum cavity, and the mesh The outer side of the cloth layer is sequentially provided with an open foam layer, an aluminum foil layer, a first protective layer, and an ordinary foam layer, and the open foam layer, the aluminum foil layer, the first protective layer, and the ordinary foam layer are sequentially distributed from the inside to the outside; Each of the vacuum chambers is provided with a connecting pipe, the tank body is provided with an air extraction pipe, and a vacuum pump is provided on the air extraction pipe, and each of the vacuum chambers is connected by the corresponding connection pipe and the vacuum pump. The trachea is set in communication, and each of the connecting pipes is provided with a vacuum gauge and a gas detector. The invention aims to provide a double vacuum heat preservation device for an ultra-low temperature liquefied gas storage tank body with good heat preservation effect. |