Cryogenic fluid delivery pipeline

Abstract

The invention relates to the technical field of conveying of low-temperature fluid, in particular to a low-temperature fluid conveying pipeline, comprising an internal pipe, a vacuum pipe and an external pipe; the internal pipe is applied to conveying the low-temperature fluid; the external surface of the internal pipe is covered with a plurality of layers of heat insulating materials; the vacuum layer is arranged between the internal pipe and the vacuum pipe and is capable of effectively insulating heat; the internal pipe is installed inside the vacuum pipe by means of a radial support component; the internal pipe at the vertical section is fixed in the vacuum pipe by means of an axial support component; protective gases are filled between the vacuum pipe and the external pipe; the radial support component is arranged between the internal pipe and the vacuum pipe, so that the heat of the vacuum pipe can reach the internal pipe after being subjected to several point contacts; the heat transfer volume is proportional to the heat transfer area, so that the design of a large number of point contacts is capable of effectively reducing heat leakage amount of the support structure; in addition, the protective gasses are filled between the vacuum pipe and the external pipe and is beneficial to preventing the low-temperature fluid from being mixed with the air and exploded.

Description

technical field [0001] The invention relates to the technical field of cryogenic fluid delivery, in particular to a cryogenic fluid delivery pipeline. Background technique [0002] At present, in the cryogenic fluid transmission pipeline, in order to prevent the external heat from being transferred to the cryogenic fluid, a double-layer tube with a vacuum layer is generally used. This structure is widely used in the transmission of common fluids such as liquid nitrogen and liquid helium. [0003] However, due to the extremely low temperature of the cryogenic liquid, there is still a certain amount of heat leakage even if the vacuum layer is used for heat insulation. Fluid pipes have a huge temperature difference in heat conduction, which is one of the important reasons for heat leakage. Therefore, good support mechanism design is very important. In addition, if there are long-distance vertical cryogenic pipelines in the project, in addition to the radial support structure,...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the current low-temperature conveying pipe with a vacuum layer has poor heat insulation performance and is prone to explosion when conveying flammable and explosive liquids such as hydrogen, it provides a low-temperature fluid conveying pipe with higher heat insulation performance and safety performance

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