Steel inner container big capacity high pressure tank and its preparation

Abstract

The present invention relates to a steel inner container big capacity high pressure tank and its preparation, which includes an inner bag made of steel high pressure seamless pipe, an intensive compound shell with the outwall wrap solidified and a protection course. The structure adopts the following steps to process: 1. selecting matching steel high pressure seamless pipe and adopting the spinning beading, heat treatment modulator, trueing machine processing to make the inner bag; 2. rotating the bracket to position the inner bag; 3. setting the high tensile fiber glue roller guide on the inner bag; 4. setting the initial wrap helix angle smaller than 40 degree and the pre-tension 5-15% of the fiber bundle tensile strength; 5. gapless thickly wrapping between the two beadings of the inner bag alternate in the clockwise and counter-clockwise; 6. adding the wrapping angle 0.5-1.5 degree completing the alternation every time; 7.maintaining the design thickness of the intensive compound layer when the wrapping angle increases to the 75-85 degree; 8. being posted into the curing oven for drying, curing, shaping process.

Description

technical field [0001] The invention relates to a large-volume high-pressure winding gas cylinder structure with a steel inner tank for storing and transporting high-pressure gas and a manufacturing method thereof. Background technique [0002] With the economic development and popularization and application of modern technology, the amount of gas such as hydrogen and helium has increased sharply, but this gas is difficult to liquefy. The liquefaction temperature of hydrogen is -252.8°C, and the liquefaction temperature of helium is -268.9°C . The simplest, most practical and economical way to achieve storage and transportation is to increase the storage and transportation pressure. At present, the pressure of transporting hydrogen internationally has been raised to 35MPa, and is developing to a pressure above 45MPa. The pressure of my country's aerospace, aviation, missile launch and ship storage for special needs gases is also above 35MPa. At present, there is no seamle...

AI Technical Summary

Problems solved by technology

Due to the welded structure, the strength of the steel is low, the weight of the equipment is large, the fatigue resistance is poor, and the volume put into transportation is also small

450-1000 liter gas cylinders can only be solved by imports

The single-angle cross-winding and so-called orthogonal winding in the prior art do not make full use of the tensile modulus of elasticity of the fiber to compensate for the failure process of the liner, resulting in heavy weight and high cost of the composite high-pressure gas cylinder , the larger the water volume, the more prominent the problem, the fundamental reason is that the contribution of overcoming the fatigue deformation of the inner tank has not been fully exerted

The role of different high-strength fibers in different parts has not been reasonably distributed, which is the main defect in structural design

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