Compressed natural gas bottle with 35MPa aluminum alloy inner container fully wound with basalt fiber

Abstract

The invention discloses a compressed natural gas bottle with a 35MPa aluminum alloy inner container fully wound with basalt fiber. The compressed natural gas bottle comprises a natural gas bottle bodywith the aluminum alloy inner container. A basalt fiber winding layer is arranged on the outer surface of the aluminum alloy inner container in a layered order in a fully winding mode, the basalt fiber winding layer comprises a circumferential winding layer winding around a aluminum alloy inner container cylinder body and a spiral winding layer winding around the aluminum alloy inner container cylinder body and heads at the two ends, and the spiral winding direction of the aluminum alloy inner container cylinder body and the heads at the two ends is consistent and continuous; and the aluminumalloy inner container is first subjected to shot blasting, and then is wound with the basalt fiber winding layer , after winding the aluminum alloy inner container, the outer surface of the basalt fiber winding layer is coated with a protective layer, and the protective layer is bisphenol A epoxy resin. The natural gas bottle can increase the working pressure of a CNG bottle for the vehicle to 35MPa, the utilization rate of the gas storage can be improved, the driving range of CNG vehicles is increased to reach the same mileage as gasoline vehicles, the strength of the aluminum alloy inner container is strengthened, and the anti-pressure ability, yield pressure, burst pressure and anti-fatigue ability of the natural gas bottle are improved.

Description

technical field [0001] The invention relates to the technical field of compressed natural gas cylinders, in particular to a compressed natural gas cylinder with a 35MPa aluminum alloy liner fully wound with basalt fibers. Background technique [0002] Compressed natural gas (CNG) cylinders for vehicles are important energy storage devices for gas vehicles. At present, CNG cylinders for vehicles mainly use traditional glass fiber (GF), aramid fiber (NF), carbon fiber (CF) and other fiber-wound composite material cylinders and steel cylinders. The working pressure of these two types of gas cylinders is lower than 20MPa, the gas contained in them is less, and the driving mileage is short. In addition, the safety of metal gas cylinders is low. Although composite gas cylinders make up for the lack of metal gas cylinders in terms of safety, they also improve the performance of gas cylinders. However, traditional glass fiber-wound aluminum alloy gas cylinders are heavy and carbon ...

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Problems solved by technology

[0006] The development of existing compressed natural gas cylinders is mostly focused on compressed natural gas cylinders for vehicles with a working pressure of 20 MPa and below, resulting in low mileage of compressed natural gas vehicles. The CNG cylinder disclosed in the patent document CN104913185A is a mixture of basalt fiber and carbon fiber. Although the working pressure of the composite gas cylinder reaches 35MPa, the strength structure layer of the composite gas cylinder is a basalt fiber and carbon fiber hybrid fiber winding layer, which does not reflect the unique superior performance of basalt fiber

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