Processing technology of large-volume thick-walled high-pressure hydrogen storage steel liner

Abstract

The invention discloses a processing technology for a large-volume thick-walled high-pressure hydrogen storage steel liner, which is formed by selecting a seamless steel pipe through two ends of the compression port, and the spinning process includes the following steps: step 1, the seamless steel pipe blank The closing section of the heating machine is heated to 1000~1180°C; step 2, spinning head and aggregate head: heat the closing section, clamp the outer wall of the seamless steel pipe blank with the claws of the main shaft of the spinning machine, and heat it at 180~ Rotate at a speed of 220r / min, and at the same time, put the working surface of the rotary wheel close to the outer wall of the closing section of the seamless steel pipe billet for 6~7 passes of hemispherical spinning; Step 3, thicken the aggregate head: continue to add heat to make the closing section The temperature is kept at 950~1180℃, and the spinning wheel arm drives the spinning wheel to carry out 5~6 passes of spinning at a speed of 0.10~0.14rad / s according to the arc trajectory, and the ratio of the step amount of each pass to the wall thickness of the closing section is 0.74~ 0.52:1, to form a head and aggregate head with increased wall thickness; step 4, rotate the wheel arm 12~14°, then feed the mold base along the axis of the seamless steel pipe blank, and at the same time, the wheel arm drives the wheel Oscillating spinning, through 2~3 passes, the structure of ellipsoidal bottle shoulder is smooth and extended to the bottleneck.

Description

technical field [0001] The invention belongs to the field of large-capacity high-pressure gas storage equipment, and in particular relates to a processing technology of a large-capacity high-pressure hydrogen storage steel liner with a volume of more than 500L. Background technique [0002] With the development of new energy technologies, especially the breakthrough of hydrogen energy technology, the demand for large-volume containers for storing and transporting hydrogen increases accordingly. Since the liquefaction temperature of hydrogen is low (-252.8°C), the easiest, practical and economical way to achieve storage and transportation is to increase the storage and transportation pressure of hydrogen. Among them, the large-capacity fully wound high-pressure hydrogen storage container can be used for high-pressure and large-volume hydrogen storage. Due to the limitation of the performance of metal materials, the development of large-capacity hydrogen storage tanks is limi...

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Problems solved by technology

[0004] The pressure bearing of the steel liner fully wound high-pressure hydrogen storage container is fully wound and the pressure is extremely high, so the wall thickness of the steel liner is designed to be thicker, greater than 20mm; the two ends of the liner are designed as dish-shaped bottle shoulders The shape and the wall thickness of the bottleneck are 1.5 to 2.5 times the thickness of the steel liner; due to the high working pressure, the shear stress of the internal thread of the bottleneck is large, and the thread is long, so the length of the straight side of the bottleneck is generally not less than 100mm. Compared with conventional high-pressure For gas cylinder products, spinning is very difficult, resulting in many quality problems in spinning, such as the spinning steel pipe moving back and forth, resulting in unformed spinning; the inner hole after spinning is too large to meet the machining requirements of the design process; the impact and vibration during spinning are relatively large. Easily damaged equipment, etc.

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