Efficient heat-insulation liquid nitrogen storage tank

Abstract

The invention relates to the field of storage tank technical equipment, in particular to an efficient heat-insulation liquid nitrogen storage tank. The efficient heat-insulation liquid nitrogen storage tank comprises a shell, an inner tank and a vacuum heat-insulation interlayer arranged between the shell and the inner tank, an upper seal head coating quilt, a tank body coating quilt and a lower seal head coating quilt which are coated on the top, the tank body and the bottom of the inner tank respectively are arranged in the vacuum heat-insulation interlayer, and the three coating quilts areformed by superposing a plurality of layers of heat insulation paper and a plurality of layers of aluminum foil layers on the outer wall of the inner tank at intervals. According to the liquid nitrogen storage tank, the plurality of layers of overlapped heat insulation paper and aluminum foil layers are adopted to form a heat radiation prevention screen to block heat transmission, the problems about heat preservation, heat insulation and heat conduction of a vacuum heat insulation interlayer are solved, and the heat insulation and heat preservation performance of the liquid nitrogen storage tank is improved, so that the evaporation rate of liquid nitrogen in the tank is reduced, and the liquid nitrogen consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of storage tanks, in particular to a high-efficiency heat-insulated liquid nitrogen storage tank. Background technique [0002] Liquid nitrogen storage tank is a container device that uses the low-temperature environment generated by the evaporation of liquid nitrogen in the container to absorb heat for long-term storage of biological products (such as blood, sperm, embryos, stem cells, various biological tissues, etc.) and can effectively maintain biological activity. The liquid nitrogen storage tank is mainly composed of a container shell, a container liner, and a vacuum insulation interlayer between the container shell and the container liner. [0003] At present, the vacuum insulation interlayer adopts the structure of multi-layer winding thermal insulation paper, but the structure of multi-layer winding thermal insulation paper has the following disadvantages: [0004] 1. The multi-layer winding method...

AI Technical Summary

Problems solved by technology

[0004] 1. The multi-layer winding method must use a professionally designed mechanical winding machine (manual winding will cause defects such as pollution, breakage, damage, and uneven winding strength), which is costly and expensive;

[0005] 2. Due to the tank structure design of the liquid nitrogen storage tank, the winding is asymmetrical, which will lead to uneven winding layers. Some parts have more layers, and some parts have fewer layers. The tightness of the winding is also inconsistent

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