Anti-pollution Technology of Continuous Vacuum Insulated Double-wall Pipe

Abstract

The invention discloses an anti-pollution process for a continuous type vacuum heat-insulation double-wall pipe. According to the anti-pollution process for the continuous type vacuum heat-insulationdouble-wall pipe, the selected and used heat-insulation form is double-wall vacuum, the defects of being prone to leaking and difficult to detect of conventional wrapped heat-insulation materials areeffectively avoided, strict anti-pollution measures are well performed on an inner pipe and an outer pipe of the double-wall pipe in the fabrication, storage-transportation and installation processesand after the installation process, the long-term stability of the vacuum is realized, and reliable and efficient results are achieved for final LNG nondestructive conveying.

Description

technical field [0001] The invention belongs to the field of double-wall pipe manufacturing technology, and more specifically relates to a continuous vacuum heat-insulated double-wall pipe anti-pollution technology. Background technique [0002] There are ultra-low temperature pipelines (design temperature is -165°C) in the fuel storage and supply system of the ship's LNG main engine. At present, for pipelines of this temperature level, stainless steel tubes are used to outsource thermal insulation materials to transport low-temperature media. This method has many problems, such as it is difficult to detect pipeline leakage; the volume of pipelines with outsourcing insulation is too large. It is easy to age and damage. [0003] In order to solve the above problems, the applicant adopts a continuous heat-insulated double-wall pipe to replace the original pipeline for transporting low-temperature medium, which includes an inner pipe and an outer pipe, a bracket is set between...

AI Technical Summary

Problems solved by technology

At present, for pipelines of this temperature level, stainless steel tubes are used to outsource thermal insulation materials to transport low-temperature media. This method has many problems, such as it is difficult to detect pipeline leakage; the volume of pipelines with outsourcing insulation is too large. Easy to age and damage

[0003] In order to solve the above problems, the applicant adopts a continuous heat-insulated double-wall pipe to replace the original pipeline for transporting low-temperature medium, which includes an inner pipe and an outer pipe, a bracket is set between the inner pipe and the outer pipe, and the inside of the entire heat-insulated double-wall pipe As a whole vacuum chamber, it is vacuumed, but it is actually installed and operated on a ship, and the environment is relatively harsh. How to prevent double-wall pipe pollution is particularly important

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