A composite material liner and method of making the same

Abstract

The invention discloses a composite material liner and a manufacturing method thereof, comprising a boss and a liner body. The liner body is mainly composed of an anti-crack structure layer, an anti-leakage plastic film layer and a boss composed of woven carbon fiber composite materials. The fixed structure is composed; the anti-leakage plastic film layer and the boss fixed structure are welded or bonded to form a first anti-leakage layer; the anti-crack structure layer is laid on the outside of the first anti-leakage layer; The boss fixing structure is provided with a rim; the boss fixing structure is connected with the anti-leakage plastic film layer through the rim; the present invention designs the weaving method of the composite woven fabric and optimizes the filling material, so as to improve the internal In the working stage of the gas cylinder, the composite material layer can share part of the load requirements of the structural layer, and at the same time share the leakage prevention function of the original inner tank, improve the failure mode and improve the safety of the gas cylinder.

Description

technical field [0001] The invention relates to the technical field of inner bladders, in particular to a composite material inner bladder and a manufacturing method thereof. Background technique [0002] The existing hydrogen storage bottles in my country are mainly 35Mpa type III bottles. The metal hydrogen embrittlement effect is more significant with the increase of hydrogen storage pressure, and the upgrade space of directly following the existing three-type bottle technology route is limited. The 70Mpa four-type bottle wrapped with plastic liner has the characteristics of corrosion resistance, light weight and high strength, and has a good development prospect. [0003] A conventional composite wound pressure vessel with an inner bladder with a composite outer layer typically designed to prevent structural damage due to bottle rupture and an inner bladder designed to contain enclosed fluids, but in fact the inner bladder It also assumes the role of the winding axis i...

AI Technical Summary

Problems solved by technology

[0003] A conventional composite wound pressure vessel with an inner bladder on which the composite outer layer is usually designed to prevent structural failure due to bottle rupture, and an inner bladder designed to hold the enclosed fluid, but in fact the inner bladder It also assumes the role of the winding axis in the production process of the winding layer of the bottle body, so it must maintain a certain strength. Under this technical route, there is a bottleneck in reducing the weight of the plastic liner.

Liners in pressure vessels are not efficient at withstanding the internal pressure loads of the pressure vessel, which makes the liner a burden prone to weight gain

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