Super-pressure hydrogen cylinder manufacture method

Abstract

The invention relates to a preparation method of a super-pressure hydrogen cylinder, which comprises choosing seamless steel pipe which is hot-roll-formed by high grade chrome-molybdenum steel whose wall thickness is not less 27mm, S is smaller 0.01.%, and P is smaller 0.020% as base material, no existing the weakness of wall thickness 5%line size through supersonic inspection, processing the form of the two end by rotationally pressing reducing, flattening the heads of the two ends, removing inner and outer folds on the shoulder portion, shot-blasting the inner side and the outer side of the bottle, heat hardening with heating temperature of 850-950 DEG C, tempering in 580-700 DEG C, accurately processing the end face of the bottle and inner threads and outer threads, shot-blasting the inner side and the outer side of the bottle in second time to remove remanent stress concentration area, proceeding 100% magnetic particle detection for the bottle, proceeding 100% ultrasonic detection to the two ends, carrying out secondary 100% supersonic inspection to the bottle after proceeded water pressure experiment and pressure-tight experiment according to mating installation specification, drying the inner portion of the bottle, processing rust prevention on the outer portion of the bottle, assembling bottleneck switches on bottlenecks on the two ends, and evacuating the inner portion to replace nitrogen atmosphere for storage for use.

Description

technical field [0001] The invention belongs to a manufacturing method of an ultra-high pressure hydrogen cylinder, which is an improvement to the existing high-pressure hydrogen cylinder manufacturing process, and is especially suitable for mobile hydrogen stations or transport vehicles equipped with fuel hydrogen. technical background [0002] With the wide application and popularization of hydrogen as a fuel, hydrogen transportation and mobile gas stations have entered a period of rapid development. However, the current capacity of high-pressure gas cylinders is far from meeting the needs of market development due to the limitation of pressure bearing capacity. .The key to improving the transportation capacity of hydrogen is to improve the pressure resistance of hydrogen cylinders. Improving the pressure resistance of hydrogen cylinders is limited by materials, structures, processes and the phenomenon of "hydrogen embrittlement". The so-called "hydrogen embrittlement" phen...

AI Technical Summary

Problems solved by technology

At present, the pressure test of high-pressure hydrogen cylinders at home and abroad only reaches 20MPa. The domestic "Gas Cylinder Safety Supervision Regulations" only gives a pressure range of 1.0-30MPa. How to design according to the existing technical conditions and basic theory, It has become an urgent task to find a method of making ultra-high pressure hydrogen cylinders after rigorous experiments and inductive processing.

Images