Gas cylinder with fully-wound plastic liner and molding technology thereof

Abstract

The invention relates to a cylinder for storing liquefied petroleum gas and discloses a gas cylinder with a fully-wound plastic liner and a molding technology thereof. The gas cylinder comprises a cylinder body and a cylinder opening, wherein the cylinder body comprises a plastic liner, the liner is wound with a composite material wound layer; the cylinder opening comprises a valve seat which is matched with the liner. According to the invention, a metal flange sealing principle and a unique molding process are adopted, the liner is used as a sealing base surface, a sealing pad is used as a sealing medium, the metal valve base is used as a sealing stressed base, the reliability and tightness of the connection between plastic and metal can be ensured by using a fixing flange to apply a rated sealing force so that the gas cylinder can achieve excellent gas tightness; in addition, a milled opening and a limit boss are arranged on the outer wall of the fixing flange, thereby improving the antitorque performance and shock resistance of the gas cylinder and meeting the technical and safety requirements of a rechargeable gas cylinder.

Description

[0001] technical field [0002] The invention relates to a storage bottle for liquefied petroleum, in particular to a fully wound gas cylinder with a plastic liner containing gas or a gas-liquid mixture with a pressure of 1-100 MPa, which is non-corrosive to the plastic liner and metal bottle mouth. Background technique [0003] Fully wound gas cylinders with plastic liners have broad prospects for replacing traditional metal gas cylinders due to their light weight, high strength, corrosion resistance and other excellent properties. However, due to the limitation of the strength of the plastic itself, the gas outlet of the plastic liner cylinder is usually made of metal materials. Due to the large difference in modulus and thermal expansion rate of the two materials, the joint of the two materials will be damaged when subjected to cyclic loads. Cracks appear due to discontinuous rigidity; under the action of ambient temperature, thermal stress will be generated, and cracks w...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the lack of sealing reliability and easy leakage in the prior art, the present invention provides a fully wound plastic liner gas cylinder, which can accurately control the sealing force between the plastic and metal bottle mouths, so that the gas cylinder The fully-wound gas cylinder structure with plastic liner is more reliable in sealing and extremely simple to assemble, which meets the safety requirements of fully-wound gas cylinders with plastic liner and is conducive to the automatic production of gas cylinders

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