Bottleneck structure of composite gas cylinder with fiber fully-wound plastic inner container

Abstract

The invention discloses a bottleneck structure of a composite gas cylinder with a fiber fully-wound plastic inner container, and belongs to the technical field of hydrogen storage equipment. The bottleneck structure of the composite gas cylinder with the fiber fully-wound plastic inner container comprises the plastic inner container. The bottleneck structure is characterized in that a metal bottleneck is installed at a bottleneck of the plastic inner container and comprises a metal annular lining and a metal annular sleeve, the metal annular lining is inserted into the bottleneck of the plastic inner container, and the metal annular sleeve sleeves the outer portion of the bottleneck of the plastic inner container, the lower portion of the metal annular sleeve is wound and fixed with the plastic inner container through a carbon fiber layer, and the upper portion of the annular sleeve is fixedly connected with the plastic inner container through plastic hot riveting; and the bottom of the metal annular lining is in clamped and fixed connection with the bottleneck of the plastic inner container. Through the cooperation of the plastic hot riveting technology, a ball groove structure and screw connection, the metal bottleneck does not need to be embedded into the plastic inner container to be integrally formed with the plastic inner container, and cracks are prevented. Through the arrangement of an O-shaped sealing ring and a check ring, hydrogen is prevented from leaking from the joint between the metal bottleneck and the bottleneck of the plastic inner container, and the sealing performance of the device is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of hydrogen storage equipment, and in particular relates to a composite gas cylinder mouth structure with a fully fiber-wound plastic liner. Background technique [0002] Fully wound composite gas cylinder with plastic liner is a portable hydrogen storage device. This type of gas cylinder is mainly used to provide hydrogen for hydrogen energy vehicles. Fully wound composite gas cylinder with plastic liner is characterized by its light weight, high strength, corrosion resistance, etc. Excellent performance is used to replace traditional metal gas cylinders, and has broad prospects. [0003] The mouth of the plastic liner is usually provided with a high-strength metal mouth. When the plastic liner is blow-molded, the metal mouth will be put into the blow mold, so that the metal mouth can be used after the plastic liner is blow-molded. Embedded in the bottle mouth of the plastic liner, the non-metal liner fibe...

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Problems solved by technology

[0003] The mouth of the plastic liner is usually provided with a high-strength metal mouth. When the plastic liner is blow-molded, the metal mouth will be put into the blow mold, so that the metal mouth can be used after the plastic liner is blow-molded. Embedded in the bottle mouth of the plastic liner, the non-metal liner fiber fully wound gas cylinder has the defect of unreliable connection between the metal bottle mouth and the non-metal liner, and due to the material of the plastic liner bottle mouth and the metal bottle mouth The difference in modulus and thermal expansion rate is large, so that the joint between the two will crack due to the discontinuity of rigidity when subjected to cyclic loading

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