High-pressure vacuum sandwich pipeline

Abstract

The invention relates to a high-pressure vacuum sandwich pipeline, and the problems of resource waste and safety risk caused by a vacuum interlayer pipeline are solved. The high-pressure vacuum sandwich pipeline comprises an inner-layer conveying pipe, intermediate pre-cooling pipes, external vacuum heat insulation pipes, first supporting frames, first flexible connecting assemblies and second flexible connecting assemblies, wherein pre-cooling medium is arranged in the intermediate pre-cooling pipes; the inner-layer conveying pipe, the intermediate pre-cooling pipes and the external vacuum heat insulation pipes are sequentially arranged from inside to outside and are coaxial, the plurality of external vacuum heat insulation pipes are connected through the first flexible connection assemblies, and the plurality of intermediate pre-cooling pipes are connected through second flexible connecting assemblies; the first supporting frames are multiple, a plurality of first supporting frames are arranged between the intermediate pre-cooling pipes and the inner-layer conveying pipe and are provided with overflowing holes; a heat bridge is arranged at the two ends of the external vacuum heatinsulation pipes, and the heat bridge is of a multi-layer snake-shaped pipe structure; and a vacuumizing connector is arranged on the external vacuum heat insulation pipes, and molecular sieve filling cavities are formed in an inner cavity and are used for filling molecular sieves.

Description

technical field [0001] The invention relates to a conveying pipeline, in particular to a high-pressure vacuum interlayer pipeline. Background technique [0002] Vacuum interlayer pipelines are generally used for the transportation of ultra-low temperature media, such as liquid oxygen, liquid nitrogen, liquid hydrogen and other fluids, to transport media from cryogenic storage tanks to test equipment, and to provide oxidants for tests. At this stage, the liquid oxygen vacuum interlayer pipeline is generally divided into two layers. The inner layer is liquid oxygen, and the boiling point temperature of liquid oxygen is -183°C. Pipes, a sandwich is formed between the two layers of pipes, and the interlayer is evacuated to insulate the transfer of cold energy. [0003] When the test system starts to work, open the valve below the storage tank, and the liquid oxygen in the storage tank flows into the liquid oxygen vacuum pipeline. Since the liquid oxygen vacuum pipeline is at no...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problems of waste of resources and safety risks in the pre-cooling of existing vacuum interlayer pipelines, and provide a high-pressure vacuum interlayer pipeline

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