Comprehensive experiment testing device of flexible pipeline low-temperature circulation system

The invention discloses a comprehensive experiment testing device of a flexible pipeline low-temperature circulating system, and belongs to the related field of LNG low-temperature pipeline testing. Comprising a low-temperature circulating system, an air pressure loading system, a comprehensive experiment loading system and a connecting part. The low-temperature circulating system is respectively connected with the air pressure loading system and the comprehensive experiment loading system through a connecting part and is used for storing, conveying and recycling liquid nitrogen; the air pressure loading system 2 is used for pressurizing a total system, accelerating liquid nitrogen circulation and increasing pipeline internal pressure; the comprehensive experiment loading system is used for applying various loads to the flexible pipeline; and the connecting part is used for preventing each component from falling off in the experiment process. Field arrangement can be rapidly adjusted according to the size of